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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3729. Отображено 100.
10-05-2012 дата публикации

Schlieren type ultrasonic wave observer system

Номер: US20120113430A1
Автор: Chung-Cheng Kung, Hao-Li Liu, Ting-Chia Chang
Принадлежит: Chang Gung University CGU

The invention discloses the Schlieren type ultrasonic wave observer system. The invention states optics interference by the ultrasonic wave sound field after perturbation the medium, and combines to make the interference penetration optical projection the image, the goal lies in the observation ordinary naked eye blind ultrasonic wave sound field distribution. Characteristic of the invention using the spectroscope and the reflector combination, as well as microcontroller precise time delay control, might formerly be limited under the 4F optical field length limit to enhance largely the field of vision the several fold.

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Номер записи: 1
05-07-2012 дата публикации

Acoustic wave measuring apparatus, acoustic wave imaging apparatus and method for controlling acoustic wave measuring apparatus

Номер: US20120167693A1
Автор: Yasufumi Asao
Принадлежит: Canon Inc

An acoustic wave measuring apparatus includes a light source for radiating a light having a wavelength component in wavelength areas, light filters arranged in a light path from the light source to a subject and each to shut off or transmit the light in one of the wavelength areas, a detector for detecting an acoustic wave generated by the radiation, a controller for generating conditions having different combinations of the wavelength components contained in the light, and a signal processor for calculating an optical absorption coefficient of the subject for the light in each wavelength area based on a pressure of the acoustic wave detected under each of the conditions and a strength of the radiated light for each wavelength area under conditions.

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Номер записи: 2
02-08-2012 дата публикации

Simulator and method for simulating an acoustic field of an acoustic waveguide

Номер: US20120197604A1
Автор: Boris G. Katsnelson, Mohsen Badiey
Принадлежит: University of Delaware

Simulators and methods for simulating an acoustic field of an acoustic waveguide are provided. A sound speed profile of the acoustic waveguide is generated, where the acoustic waveguide has a region of a first fluid within a second fluid, and the first fluid has a different acoustic index of refraction than the second fluid. The sound speed profile and predetermined parameters of a sound source and a receiver are applied to a parabolic equation (PE) model of sound propagation in the acoustic waveguide. The acoustic field of the acoustic waveguide is determined from the PE model. The acoustic field includes an interference pattern from interference between an acoustic signal of the acoustic source and at least one signal refracted by the region of the second fluid.

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Номер записи: 3
27-09-2012 дата публикации

Subject information acquisition apparatus and subject information acquisition method

Номер: US20120243369A1
Автор: Kazuhiko Fukutani, Takao Nakajima, Yoshiaki Sudo, Yoshitaka Baba
Принадлежит: Canon Inc

A subject information acquisition apparatus includes: an acoustic wave detector which detects an acoustic wave which is generated from a subject by irradiating light and outputs a detection signal; an amplifier which amplifies the detection signal which is output from the acoustic wave detector; a gain control unit which changes a gain of the amplifier as time elapses, according to a gain control table, in order to correct a drop in intensity of the acoustic wave caused by attenuation of fluence inside the subject; and a signal processing unit which obtains information inside the subject based on the signal amplified by the amplifier. Measurement under a plurality of measurement conditions, where at least fluence distribution inside the subject or a position of the acoustic wave detector differs, is possible, and the gain control unit changes the gain control table according to the measurement conditions.

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Номер записи: 4
01-11-2012 дата публикации

Section-illumination photoacoustic microscopy with ultrasonic array detection

Номер: US20120275262A1
Автор: Konstantin Maslov, Liang Song, Lihong Wang
Принадлежит: Washington University in St Louis WUSTL

Imaging systems, probes for imaging systems, and methods for noninvasive imaging are disclosed. In one example, a probe for use with an imaging system includes a slit configured to spatially filter a light beam from a light source. The probe includes a focusing device configured to cylindrically focus the spatially filtered light beam into an object, and an ultrasound transducer array configured to detect a photoacoustic signal emitted by the object in response to the cylindrically focused light beam.

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Номер записи: 5
22-11-2012 дата публикации

Method and device for determining acoustic coefficients and acoustic power

Номер: US20120296600A1
Автор: Ysbrand Hans Wijnant
Принадлежит: Individual

A method for determining the acoustic absorption coefficient and/or the transmission coefficient at a chosen position in a space in which a certain sound field prevails as a result of the operation of a sound-emitting source.

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Номер записи: 6
27-12-2012 дата публикации

Automated Ultrasonic Elasticity Image Formation with Quality Measure

Номер: US20120330155A1
Автор: Amy Marie Sommer, Jingfeng Jiang, Timothy Jon Hall
Принадлежит: Individual

Image data and E-mode images used in ultrasonic elasticity imaging may be automatically evaluated for quality to provide a single value used as operator feedback or for automatic selection of images for averaging or animation.

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Номер записи: 7
09-05-2013 дата публикации

Cleaning apparatus, measurement method and calibration method

Номер: US20130112900A1
Автор: Etsuko Kubo, Masashi Uchibe, Teruo Haibara, Yoshihiro Mori
Принадлежит: SILTRONIC AG

A calibration method for calibrating a measurement device for measuring a concentration of a gas dissolved in a liquid includes varying the concentration of the gas dissolved in the liquid, and predetermining, as a reference concentration, a concentration of the gas at which an intensity of luminescence produced when the liquid is irradiated with ultrasonic waves shows a peak. The liquid is illuminated with ultrasonic waves while varying the concentration of the gas in the liquid and a measured value is measured, using the measurement device, as a concentration of the gas in the liquid when the intensity of the luminescence shows a peak. The measurement device is calibrated based on the measured value and the reference concentration.

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Номер записи: 8
16-05-2013 дата публикации

Constituent Concentration Measuring Apparatus and Constituent Concentration Measuring Apparatus Controlling Method

Номер: US20130118262A1
Автор: NAGANUMA Kazunori, OKABE Yuichi, SUDO Shoichi, TAJIMA Takuro
Принадлежит: Nippon Telegraph and Telephone Corporation

An object of the present invention is to provide a noninvasive constituent concentration measuring apparatus and constituent concentration measuring apparatus controlling method, in which accurate measurement can be performed by superimposing two photoacoustic signals having the same frequency and reverse phases to nullify the effect from the other constituent occupying large part of the object to be measured. The constituent concentration measuring apparatus according to the invention includes light generating means for generating two light beams having different wavelengths, modulation means for electrically intensity-modulating each of the two light beams having different wavelengths using signals having the same frequency and reverse phases, light outgoing means for outputting the two intensity-modulated light beams having different wavelengths toward a test subject, and acoustic wave detection means for detecting an acoustic wave generated in the test subject by the outputted light. 1175-. (canceled)176. A constituent concentration measuring apparatus comprising:light generating means for generating light;light modulation means for electrically intensity-modulating the light at a constant frequency, the light being generated by the light generating means;light outgoing means for outputting the intensity modulated light toward an object to be measured, the intensity modulated light being intensity-modulated by the light modulation means; andacoustic wave detection means for detecting an acoustic wave which is emitted from the object to be measured irradiated with said intensity modulated light,the constituent concentration measuring apparatus characterized in that an acoustic matching substance and said object to be measured can be arranged between said light outgoing means and said acoustic wave detection means, the acoustic matching substance having acoustic impedance substantially equal to that of said object to be measured.177. A constituent concentration ...

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Номер записи: 9
27-06-2013 дата публикации

Internal defect inspection method and apparatus for the same

Номер: US20130160552A1
Автор: Kazushi Yoshimura, Masahiro Watanabe, Takehiro TACHIZAKI, Tetsuya Matsui, Toshihiko Nakata
Принадлежит: HITACHI LTD

It is intended to provide an internal defect inspection method and an apparatus for implementing the method by which an ultrasonic wave is excited in a sample without contact with the sample and accordingly without damaging the sample, and an ultrasonic wave from any internal defect of the sample is detected without being affected by the sample surface, in a non-contact state and with high sensitivity. By the internal defect inspection method, an ultrasonic wave is emitted from an ultrasonic wave transmitter toward a sample, an ultrasonic wave reflected by the sample is detected as an interference signal with an imaging type common-path interferometer, an ultrasonic wave signal is obtained from the interference signal, and any defect within the sample is detected from the ultrasonic wave signal.

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Номер записи: 10
01-08-2013 дата публикации

Ultrasonic probe and inspection apparatus equipped with the ultrasonic probe

Номер: US20130197345A1
Автор: Katsumi Nakagawa, Kazuhiko Fukutani, Kenichi Nagae, Yasufumi Asao
Принадлежит: Canon Inc

An ultrasonic probe includes a light irradiating portion configured to radiate light for generating ultrasonic waves from a light absorber, an ultrasonic transducing portion configured to transduce the ultrasonic waves to an electric signal, and a light guide member configured to introduce light from a light source to the light irradiating portion. A light irradiating region of the light irradiating portion is included within an ultrasonic receiving region of the ultrasonic transducing portion.

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Номер записи: 11
08-08-2013 дата публикации

APPARATUS AND METHOD FOR OBTAINING OBJECT INFORMATION AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

Номер: US20130199300A1
Автор: Abe Hiroshi
Принадлежит: CANON KABUSHIKI KAISHA

An object information obtaining apparatus includes a signal processing unit configured to obtain weighted optical characteristic information about an object on the basis of feature information about the object obtained by elastography measurement or B-mode image measurement using an elastic wave signal acquired by transmission and reception of elastic waves to and from the object. 1. An apparatus for obtaining object information , comprising:a signal processing unit configured to obtain optical characteristic information about an object on the basis of a photoacoustic wave signal acquired by reception of a photoacoustic wave generated by irradiation of the object with light and obtain weighted optical characteristic information about the object on the basis of feature information about the object obtained by elastography measurement or B-mode image measurement using an elastic wave signal acquired by transmission and reception of elastic waves to and from the object.2. The apparatus according to claim 1 , wherein the signal processing unit obtains the weighted optical characteristic information on the basis of the feature information obtained by the elastography measurement.3. The apparatus according to claim 2 , wherein the feature information is an amount of distortion or an elastic modulus.4. The apparatus according to claim 1 , wherein the signal processing unit obtains the weighted optical characteristic information on the basis of the feature information obtained by the B-mode image measurement.5. The apparatus according to claim 4 , wherein the feature information is an acoustic impedance.6. The apparatus according to claim 1 , wherein the signal processing unit weights the signal intensity of the photoacoustic wave signal to obtain the weighted optical characteristic information.7. The apparatus according to claim 1 , wherein the signal processing unit weights the optical characteristic information to obtain the weighted optical characteristic information.8. ...

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Номер записи: 12
15-08-2013 дата публикации

Photoacoustic measuring device and method

Номер: US20130205903A1
Автор: Kenji Oyama
Принадлежит: Canon Inc

The present invention provides a photoacoustic measuring device and a method by which the presence of an object can be easily identifyied in a relatively short time in photoacoustic measurement while holding an object by a holding plate. The photoacoustic measuring device has a irradiating unit with which the object is irradiated with light, a holding unit holding the object by the holding plate, a detecting unit detecting the photoacoustic wave generated by irradiating light and an analyzing unit analyzing photoacoustic signal of the photoacoustic wave. The analyzing unit analyzes a photoacoustic signal to acquire information concerning change of a signal intensity of a component of the photoacoustic signal of produced in an interface between the detecting unit and the holding plate and an interface between the holding plate and the object, to identify the presence of the object.

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Номер записи: 13
15-08-2013 дата публикации

Detecting broadside and directional acoustic signals with a fiber optical distributed acoustic sensing (das) assembly

Номер: US20130211726A1
Автор: Jeffery Joseph Mestayer, Peter Berkeley Wills
Принадлежит: Individual

A Distributed Acoustic Sensing (DAS) fiber optical assembly comprises adjacent lengths of optical fiber A, B with different directional acoustic sensitivities, for example by providing the first length of optical fiber A with a first coating 35, such as acrylate, and the second length of optical fiber B with a second coating 36 , such as copper, wherein the first and second coatings 35 and 36 may be selected such that the Poisson's ratio of the first length of coated fiber A is different from the Poisson's ratio of the second length of coated fiber B. The different Poisson's ratios and/or other properties of the adjacent lengths of optical fiber A and B improve their directional acoustic sensitivity and their ability to detect broadside (radial) acoustic waves.

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Номер записи: 14
26-09-2013 дата публикации

Health monitoring method and system for drives

Номер: US20130253850A1
Автор: Antti Sakari Aulanko
Принадлежит: ABB Oy

In an exemplary method for condition monitoring of electric and mechanical drives, measurement data in a condition monitoring system of electric drives is collected at least from one electric drive. The measurement data is pre-treated, a frequency spectrum is created from the pre-treated measurement data with the Fast Fourier Transform transformation, and a detected vibration frequency and vibration amplitude are recorded from the frequency spectrum. The detected vibration frequency and vibration amplitude is compared to at least one detected vibration frequency and vibration amplitude successive in time. In the comparison, detrimental changes in vibration frequency and vibration amplitude are defined, and the detrimental changes are indicated.

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Номер записи: 15
26-09-2013 дата публикации

ULTRASONIC MEASUREMENT AND DETERMINATION OF CRYSTALLOGRAPHIC TEXTURE WITH RESPECT TO POSITION

Номер: US20130253858A1
Автор: Gilbert Jeffrey A., Glavicic Michael G.
Принадлежит: Rolls-Royce Corporation

A technique and device () may be utilized to determine a characteristic of a crystallographic texture of a sample () based on a detected ultrasonic waveform. The device may be configured to receive ultrasonic waveform data representative of a reflected ultrasonic waveform that propagated through a sample from an ultrasonic detector (). The device may select a portion of the ultrasonic waveform data and apply a Fast Fourier Transform to the portion of the ultrasonic waveform data to transform the portion from a time domain to a frequency domain. The device then may identify a dominant frequency () of the portion in the frequency domain and determine a characteristic of a crystallographic texture for the portion based on the dominant frequency of the portion. 1. A system comprising: receive from an ultrasonic waveform detector ultrasonic waveform data representative of a reflected ultrasonic waveform that propagated through a sample;', 'select a portion of the ultrasonic waveform data;', 'apply a Fast Fourier Transform to the portion of the ultrasonic waveform data to transform the portion from a time domain to a frequency domain;', 'identify a dominant frequency of the portion in the frequency domain; and', 'determine a characteristic of a crystallographic texture for the portion based on the dominant frequency of the portion., 'a data analysis device configured to2. The system of claim 1 , further comprising:an ultrasonic waveform generator; and 'cause the ultrasonic transducer to generate an ultrasonic waveform that propagates through a first surface of the sample to a second surface of the sample, wherein at least a portion of the ultrasonic waveform reflects from the second surface of the sample to form the reflected ultrasonic waveform.', 'the ultrasonic waveform detector, wherein the data analysis device is further configured to3. The system of claim 1 , wherein the sample comprises at least one of a polycrystalline material claim 1 , titanium claim 1 , or a ...

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Номер записи: 16
03-10-2013 дата публикации

PROBE AND OBJECT INFORMATION ACQUISITION APPARATUS USING THE SAME

Номер: US20130255388A1
Автор: Nakanishi Koichiro, Takeuchi Eiji
Принадлежит: CANON KABUSHIKI KAISHA

A probe is provided that can suppress the warp of an optical reflection member on a receiving surface and stably receive photoacoustic waves. The probe includes: an element having at least one cell in which a vibration film containing one electrode out of two electrodes that are provided so as to interpose a space therebetween is supported in a manner allowed to vibrate owing to the acoustic wave; an optical reflection layer 108 that is provided closer to the object than the element is; a support layer 104 supporting the optical reflection layer 108; and a warp suppressing layer 106 that is provided on at least one of the both surfaces of the support layer 104. 1. A probe receiving an acoustic wave from an object , comprising:an element having at least one cell in which a vibration film containing one electrode out of two electrodes that are provided so as to interpose a space therebetween is vibratably owing to the acoustic wave,;an optical reflection layer that is provided closer to the object than the element is;a support layer that is provided closer to the element than the optical reflection layer is, and supports the optical reflection layer; anda warp suppressing layer to suppress the warp of the support layer, that is provided on at least one of a surface of the support layer closer to the optical reflection layer and a surface of the support layer closer to the element.2. The probe according to claim 1 , wherein the warp suppressing layer has a Young's modulus of at least 100 MPa.3. The probe according to claim 1 , wherein the warp suppressing layer has a thickness equal to or less than 100 μm.4. The probe according to claim 1 , wherein the warp suppressing layer is made of inorganic material.5. The probe according to claim 4 , wherein the warp suppressing layer is an SiOfilm.6. The probe according to claim 1 , further comprising an acoustic impedance matching layer between the element and the support layer.7. The probe according to claim 6 , wherein the ...

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Номер записи: 17
28-11-2013 дата публикации

METHOD AND SYSTEM FOR THREE-DIMENSIONAL VIBRATION MEASUREMENT USING VIBROMETER

Номер: US20130312529A1
Автор: KIM Dong Kyu, PARK Kyi Hwan
Принадлежит: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY

Disclosed herein are a system and method for three-dimensional vibration measurement. The method includes measuring vibration components and shape information at a vibration measurement point of a measurement target by sequentially emitting laser beams to the vibration measurement point of the measurement target at each of three measuring positions for measuring vibration of the measurement target; obtaining transformation matrices between first to third coordinate systems with respect to each of the measuring positions and a local coordinate system with respect to the vibration measurement point of the measurement target, based on the shape information; measuring angles between unit vectors of respective axes of the local coordinate system and direction vectors of the laser beams emitted with reference to the first to third coordinate systems upon measuring the vibration components; and measuring three-dimensional vibration of the measurement target based on the vibration components and the angles. 1. A three-dimensional vibration measurement method comprising:by a distance-measuring device, obtaining shape information of a measurement target by measuring a distance from the measurement target;by a vibrometer, sequentially emitting laser beams to a vibration measurement point of the measurement target at each of three measuring positions for measuring vibration of the measurement target to measure vibration components at the vibration measurement point;by the vibrometer, obtaining transformation matrices between first to third coordinate systems with respect to each of the measuring positions and a local coordinate system with respect to the vibration measurement point of the measurement target, based on the shape information obtained by the distance-measuring device;by the vibrometer, measuring angles between unit vectors of respective axes of the local coordinate system and direction vectors of the laser beams emitted with reference to the first to third ...

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Номер записи: 18
19-12-2013 дата публикации

Property measurement system for metal material

Номер: US20130335745A1
Автор: Mitsuhiko Sano
Принадлежит: Toshiba Mitsubishi Electric Industrial Systems Corp

A property measurement system for a metal material includes: a laser oscillator that emits a pulse laser beam; a lens array that has small lenses with a same shape, the small lenses being laid in a matrix on a plane perpendicular to an optical axis of the pulse laser beam, and arranged so that a part of a cross section of the pulse laser beam can be made incident onto each of small lenses; a condensing lens that overlaps and condenses emitted beams coming from the small lenses on a same region of a surface of a metal material as a measurement target; a laser interferometer that detects, as an electric signal, a pulse ultrasonic wave that is excited by the pulse laser beam condensed and propagates through an inside of the metal material; and a signal processing device that processes the electric signal.

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Номер записи: 19
23-01-2014 дата публикации

STRUCTURE MONITORING

Номер: US20140022530A1
Автор: Farhadiroushan Mahmoud, Finfer Daniel, Kamil Yousif, Kutlik Roy Lester
Принадлежит:

A method and apparatus for monitoring a structure using an optical fiber based distributed acoustic sensor (DAS) extending along the length of the structure. The DAS is able to resolve a separate acoustic signal with a spatial resolution of 1 m along the length of the fibre, and hence is able to operate with an acoustic positioning system to determine the position of the riser with the same spatial resolution. In addition, the fiber can at the same time also detect much lower frequency mechanical vibrations in the riser, for example such as resonant mode vibrations induced by movement in the surrounding medium. By using vibration detection in combination with acoustic positioning then overall structure shape monitoring can be undertaken, which is useful for vortex induced vibration (VIV) visualisation, fatigue analysis, and a variety of other advanced purposes. The structure may be a sub-sea riser. 1. A method of vibration detection in a structure using an optical fiber distributed acoustic sensor deployed in a known relationship with respect to the structure such that a known part of the optical fiber corresponds to and moves with a known part of the structure , the method comprising:detecting backscattered light on the fiber, the backscatter being dependent on strain induced in the fibre due to mechanical strain in the structure to which the fibre relates caused by vibrations in the structure;from the detected backscatter, processing a signal representative thereof to determine a frequency of oscillation of the vibrations in the structure.2. A method according to claim 1 , and further comprising frequency filtering the signal detected by the optical fibre DAS to obtain low frequencies claim 1 , wherein the low frequencies are used for vibration detection.3. A method according to claim 2 , wherein the low frequencies comprise frequencies of less than 100 Hz.4. A method according to claim 1 , and further comprising undertaking passive acoustic monitoring.5. A method ...

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Номер записи: 20
23-01-2014 дата публикации

STRUCTURE MONITORING

Номер: US20140025319A1
Автор: Farhadiroushan Mahmoud, Finfer Daniel, Kamil Yousif, Kutlik Roy Lester
Принадлежит:

A method and apparatus for monitoring a structure using an optical fiber based distributed acoustic sensor (DAS) extending along the length of the structure. The DAS is able to resolve a separate acoustic signal with a spatial resolution of 1 m along the length of the fibre, and hence is able to operate with an acoustic positioning system to determine the position of the riser with the same spatial resolution. In addition, the fiber can at the same time also detect much lower frequency mechanical vibrations in the riser, for example such as resonant mode vibrations induced by movement in the surrounding medium. By using vibration detection in combination with acoustic positioning then overall structure shape monitoring can be undertaken, which is useful for vortex induced vibration (VIV) visualisation, fatigue analysis, and a variety of other advanced purposes. The structure may be a sub-sea riser. 1. A method of monitoring the position of a structure using an optical fiber distributed acoustic sensor deployed in a known relationship with respect to the structure such that a known part of the optical fiber corresponds to a known part of the structure , the method comprising:using the optical fiber as a distributed acoustic sensor to detect, at a plurality of acoustic sensor positions along the fibre, acoustic signals emitted by a plurality of acoustic sources deployed at known positions in an area in which the structure to be monitored is located;calculating relative positions of a plurality of the acoustic sensors in dependence on the detected acoustic signals from the acoustic sources; andfrom the calculated positions of the sensors along the fibre, determining a shape, or shape and position, of the structure in dependence on the known relationship between the fiber and the structure.2. A method according to claim 1 , wherein the relative position of one of the acoustic sensors on the fiber is determined in dependence upon the relative position determined for one ...

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Номер записи: 21
03-01-2019 дата публикации

ACOUSTIC WAVE DETECTION PROBE AND PHOTOACOUSTIC MEASUREMENT APPARATUS PROVIDED WITH THE SAME

Номер: US20190000323A1
Автор: IRISAWA Kaku
Принадлежит: FUJIFILM Corporation

In an acoustic wave detection probe provided with a light guide section that guides measuring light such that the measuring light is outputted toward a subject and an acoustic wave transducer that detects a photoacoustic wave generated in the subject by the projection of the measuring light, the light guide section includes a homogenizer that flat-tops an energy profile of the measuring light entered from the upstream side of the optical system, a light condensing member that condenses the measuring light transmitted through the homogenizer, and a bundle fiber which includes a plurality of optical fibers and is disposed such that the measuring light transmitted through the light condensing member enters from an entrance end of the bundle fiber. 2. A photoacoustic measuring apparatus as defined in claim 1 , wherein:the homogenizer is a light shaping diffuser in which small lenses are disposed randomly on one side of a substrate so that the measuring light is further diffused.3. A photoacoustic measuring apparatus as defined in claim 1 , wherein:the holding section is configured to hold the entrance end portion of the optical fibers so as to cover the input surface of the bundle fiber, and the holding section has a window at a portion at which the measuring light enters.4. A photoacoustic measuring apparatus as defined in claim 3 , wherein:the window is constituted by an ND filter.5. A photoacoustic measuring apparatus as defined in claim 1 , further comprising:an aperture member having an aperture that allows the measuring light, which is to enter the bundle fiber, to pass through and is provided at the entrance end of the bundle fiber, and gradually reduces the diameter of the aperture toward the entrance end to a size corresponding to the diameter of the bundle fiber.6. A photoacoustic measuring apparatus as defined in any one of claim 1 , wherein:the holding section includes therein a light guide member formed of a cap member and a ring shaped chip made of a ...

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Номер записи: 22
01-01-2015 дата публикации

OBJECT INFORMATION ACQUIRING APPARATUS AND LASER APPARATUS

Номер: US20150000411A1
Автор: Nagao Daisuke, Watanabe Tadaki
Принадлежит:

Used is an object information acquiring apparatus including an irradiation unit for irradiating an object with a laser beam, a wavelength switching unit for selecting a wavelength of the laser beam, a restriction unit for restricting an output value of the laser beam, a probe for receiving acoustic waves that are generated from the object irradiated with the laser beam, and a configuration unit for generating characteristic information relating to the object in use of the acoustic waves, wherein the restriction unit restricts the output value according to the wavelength selected by the wavelength switching unit. 1. An object information acquiring apparatus , comprising:irradiation means configured to irradiate an object with a laser beam;wavelength switching means configured to select a wavelength of the laser beam;restriction means configured to restrict an output value of the laser beam;a probe configured to receive acoustic waves that are generated from the object irradiated with the laser beam;construction means configured to generate characteristic information relating to the object in use of the acoustic waves; anda variable voltage power source in which a voltage is controlled by the restriction means,wherein the restriction means restricts the output value according to the wavelength selected by the wavelength switching means, andwherein the irradiation means irradiates a laser beam as a result of laser medium excitation by a flash lamp that has received a high current pulse, which was created according to the voltage value of the variable voltage power source in a pulse-forming network, and also a result of Q-switching of a laser medium by a Q-switch.2. The object information acquiring apparatus according to claim 1 , wherein claim 1 , for each wavelength of the laser beam claim 1 , the laser medium has a different gain claim 1 , which represents an output value of the laser beam relative to the voltage value of the variable voltage power source.3. The ...

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Номер записи: 23
01-01-2015 дата публикации

OBJECT INFORMATION ACQUIRING APPARATUS AND LASER APPARATUS

Номер: US20150000412A1
Автор: Nagao Daisuke, Watanabe Tadaki
Принадлежит:

An object information acquiring apparatus is used, which includes: an irradiation unit for irradiating an object with a laser beam; a restriction unit for restricting an output of the laser beam from the irradiation unit; a control unit for controlling an irradiation of the laser beam and an activation of the restriction unit; a probe for receiving acoustic waves that are generated from the object irradiated with the laser beam; and a construction unit for generating characteristic information relating to the object in use of the acoustic waves, wherein the control unit performs irradiation control of not irradiating the laser beam when the restriction unit is being activated. 1. An object information acquiring apparatus , comprising:irradiation means configured to irradiate an object with a laser beam;restriction means configured to restrict an output of the laser beam from the irradiation means;control means configured to control an irradiation of the laser beam and an activation of the restriction means;a probe configured to receive acoustic waves that are generated from the object irradiated with the laser beam; andconstruction means configured to generate characteristic information relating to the object in use of the acoustic waves,wherein the control means performs irradiation control of not irradiating the laser beam when the restriction means is being activated.2. The object information acquiring apparatus according to claim 1 ,wherein the restriction means is a shutter disposed on a light path of the laser beam, andwherein the control means performs the irradiation control during an open/close operation of the shutter.3. The object information acquiring apparatus according to claim 1 ,wherein the irradiation means irradiates a laser beam of a wavelength selected from among a plurality of wavelengths, andwherein the control means performs the irradiation control, upon changing the wavelength of the laser beam.4. The object information acquiring apparatus ...

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Номер записи: 24
07-01-2016 дата публикации

Recording device and recording method

Номер: US20160003777A1
Автор: Gerhard Krampert, Helmut Lippert, Tobias Schmitt-Manderbach, Wibke Hellmich
Принадлежит: CARL ZEISS AG, CARL ZEISS MICROSCOPY GMBH

The invention relates to a recording device comprising an excitation module ( 2, 10; 9, 10 ) which stimulates the sample ( 3 ) for emitting pressure waves, an acoustic module ( 9, 10 ) for detecting the generated pressure waves, and a control module ( 10 ) which determines an acoustic image based on the data from the acoustic module ( 9, 10 ). Said recording device also comprises a reproduction module ( 5 ) for optically reproducing the sample ( 3 ) and the control module ( 10 ) determines a sample limit and/or a segment limit within the sample ( 3 ) based on the optical reproduction of the sample ( 3 ) and when the acoustic image is detected, the determined sample limit and/or segment limit are taken into consideration.

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Номер записи: 25
07-01-2016 дата публикации

OBJECT INFORMATION ACQUIRING APPARATUS AND LASER APPARATUS

Номер: US20160003781A1
Автор: Ichihara Shigeru, Ohkoba Minoru
Принадлежит:

There is used an object information acquiring apparatus including a laser resonator configured to include two reflection bodies and a Q switch provided between the two reflection bodies and determining a Q value based on a voltage to be applied, an excitation section configured to optically excite a laser medium, a detector configured to detect light output from one of the reflection bodies, a controller configured to control the laser resonator and determine a value of the voltage based on a detection result of the detector and applies the voltage to the Q switch, a receiver configured to receive an acoustic wave propagating from an object based on irradiation of the object with laser light output from one of the reflection bodies, and an acquisition section configured to acquire information on the object based on a reception result of the receiver. 1. An object information acquiring apparatus comprising:a laser resonator configured to include two reflection bodies and a Q switch provided between the two reflection bodies and determining a Q value based on a voltage to be applied;an excitation section configured to optically excite a laser medium;a detector configured to detect light output from one of the reflection bodies;a controller configured to control the laser resonator and determine a value of the voltage based on a detection result of the detector and applies the voltage to the Q switch;a receiver configured to receive an acoustic wave propagating from an object based on irradiation of the object with laser light output from one of the reflection bodies; andan acquisition section configured to acquire information relate to the object based on a reception result of the receiver.2. The object information acquiring apparatus according to claim 1 , further comprising a branch optical element configured to be provided at a stage prior to the detector and guides part of the laser light output from one of the reflection bodies to the detector claim 1 , ...

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Номер записи: 26
07-01-2016 дата публикации

SYSTEM FOR PREDICTION AND PREVENTION OF ELECTRIC TRANSFORMER FAILURES

Номер: US20160003782A1
Автор: VAN FLEET Steven, Von Herzen Brian
Принадлежит:

The present application relates to systems for detection of partial discharges in a power transformer. In embodiments, the systems utilize fiber optic acoustic sensors to monitor the pressure waves associated with partial discharges and localize the discharges using appropriate measurement and analysis software. 1. A system for detection of a partial discharge in a power transformer , comprising:a) a control module, positioned outside the power transformer;b) a data acquisition module, positioned outside the power transformer; and i. an optical fiber at least partially disposed within the power transformer; and', 'ii. one or more mirrors configured to phase rotate an optical signal of the optical fiber by 90°±1°, the one or more mirrors positioned outside the power transformer., 'c) a fiber optic acoustic sensor coupled to the control module and the data acquisition module, the fiber optic acoustic sensor comprising2. The system of claim 1 , further comprising a dissolvable coating surrounding the optical fiber.3. The system of claim 1 , wherein the optical fiber comprises a coiled optical fiber.4. The system of claim 3 , wherein the coiled optical fiber is wound around a mandrel having a Young's modulus of about 0.01 GPa to about 1.0 GPa and a dielectric strength of about 40 MV/m to about 200 MV/m.5. The system of claim 3 , wherein the coiled optical fiber is wound around a mandrel comprising Teflon.6. The system of claim 1 , further comprising a reference optical fiber disposed outside the power transformer.7. The system of claim 1 , wherein a laser of the control module is a pulsed laser or a continuous wave laser.8. The system of claim 1 , comprising at least 3 optical fibers.9. A system for detection of a partial discharge in a power transformer claim 1 , comprising:a) a control module, positioned outside the power transformer;b) a data acquisition module, positioned outside the power transformer; and 'i. an interferometer comprising a coiled optical fiber at ...

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Номер записи: 27
04-01-2018 дата публикации

Comprehensive Checking Fixture for Steering Knuckle

Номер: US20180003475A1
Автор: Guo Jiandong, XUE Bowen
Принадлежит: CITIC Dicastal CO., LTD

A checking fixture for a steering knuckle. In use, a workpiece is mounted on the checking fixture, three locating points of the workpiece in the X direction respectively correspond to a supporting pin I, a supporting pin II and a supporting pin III, a locating taper hole limiting the motion of the workpiece in a YZ plane corresponds to the floating pin, and a locating point of the workpiece in the Y direction levelly fit to a supporting surface of a locating pin; after location is completed, the workpiece is tightly clamped by a jacking clamp, a press clamp I and a press clamp II. The checking fixture for the steering knuckle can measure the position accuracy of each hole of the steering knuckle workpiece, and can detect whether the relative height of the flange plane of the workpiece relative to the X-direction locating points is qualified. 1. A comprehensive checking fixture for a steering knuckle , comprising:landing legs, a base plate, a support I, a detection pin I, a guide sleeve I, a supporting pin I, a detection board, a standard ring, a detection pin II, a guide sleeve II, a floating pin, a keyway, a spring, a gasket, a supporting pin II, a supporting pin III, a support II, a locating pin, a jacking clamp, a press clamp I and a press clamp II;wherein four landing legs are fixed on the lower surface of the base plate;the guide sleeve I is mounted on the support I, the support I is fixed on the left side of the upper surface of the base plate, and the detection pin I matches with the guide sleeve I;the supporting pin I, the supporting pin II and the supporting pin III are all fixed at corresponding positions of the upper surface of the base plate;the locating pin is fixed on the support II, the support II is also fixed at a corresponding position of the upper surface of the base plate, and the tail end of the locating pin corresponds to a position of a locating point of the workpiece in the Y direction;the jacking clamp, the press clamp I and the press clamp ...

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Номер записи: 28
04-01-2018 дата публикации

PHOTO-ACOUSTIC DEVICE AND METHOD FOR NON-CONTACT MEASUREMENT OF THIN LAYERS

Номер: US20180003679A1
Автор: ABEL Bernd, Bauer Andreas, CHARVAT ALES, ERDMANN STEFAN, PRINZHORN Heinrich, WUTTKE THOMAS
Принадлежит: Novelis Inc.

A measuring device for non-mechanical-contact measurement of a layer, the measuring device including a light source operative to generate a pulse adapted to interact with the layer so as to generate a thermal wave in a gas medium present adjacent the layer. The thermal wave causes an acoustic signal to be generated. The measuring device further includes a detector adapted to detect a first signal responsive to the acoustic signal, the detector not being in mechanical contact with the layer. The first signal is representative of the measured layer. 120-. (canceled)21. An apparatus , comprising: an acoustic detector spaced apart from the moving layer; and', 'a light exit port spaced apart from the moving layer, wherein the light exit port is optically couplable to a light source to convey an optical pulse through the gas medium and towards the moving layer to generate a thermal wave in the gas medium adjacent the moving layer that is sufficient to generate an acoustic signal detectable by the acoustic detector;, 'a measurement head positionable opposite a gas medium from a moving layer for measuring the moving layer, the measurement head comprisingwherein the light exit port is rigidly fixed to the measurement head, and wherein the acoustic detector is rigidly fixed to the measurement head at a distance from the light exit port.22. The apparatus of claim 21 , wherein the light exit port is rigidly fixed to the measurement head such that the optical pulse is directed towards the moving layer at an angle that is greater than 80° and less than 90° with respect to a surface of the moving layer.23. The apparatus of claim 22 , wherein the angle is greater than 86°.24. The apparatus of claim 21 , further comprising:an optical subsection containing the light source; anda flexible optical fiber cable optically coupling the light exit port and the optical subsection.25. The apparatus of claim 24 , wherein the optical subsection is located remote from the measurement head.26. ...

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Номер записи: 29
07-01-2021 дата публикации

PHOTOACOUSTIC APPARATUS AND METHODS

Номер: US20210003536A1
Автор: BITAULD David
Принадлежит:

A photoacoustic apparatus, comprising: 1. A photoacoustic apparatus , comprising:at least one optical amplifier, configured to produce light;at least one photonic integrated circuit, configured as a tunable light filter;a light guide, wherein the at least one optical amplifier, at least one photonic integrated circuit and light guide are configured as an optical cavity to produce laser light having an optical path within the optical cavity; andat least one acoustic sensor configured to detect sound produced by analyte introduced into the optical path of the laser light.2. A photoacoustic apparatus as claimed in claim 1 , wherein the at least one optical amplifier comprises at least one semiconductor optical amplifier.3. A photoacoustic apparatus as claimed in claim 1 , wherein the at least one acoustic sensor comprises at least one quartz fork.4. A photoacoustic apparatus as claimed in claim 1 , comprising inlet configured to introduce analyte into the optical path of the laser light.5. A photoacoustic apparatus as claimed in claim 1 , wherein the light guide comprises a light coupler configured to couple light between the at least one optical amplifier and the at least one photonic integrated circuit.6. A photoacoustic apparatus as claimed in claim 1 , wherein the at least one acoustic sensor is located between the at least one optical amplifier and the at least one photonic integrated circuit.7. A photoacoustic apparatus as claimed in claim 1 , wherein light guide comprises a lens configured to focus the laser light to pass between prongs of the quartz fork.8. A photoacoustic apparatus as claimed in claim 7 , wherein the lens comprises a ball lens.9. A photoacoustic apparatus as claimed in claim 1 , wherein the at least one optical amplifier is formed as a first chip and the at least one photonic integrated circuit is formed as a second claim 1 , separate chip.10. A photoacoustic apparatus as claimed in claim 1 , wherein the at least one optical amplifier and the ...

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Номер записи: 30
03-01-2019 дата публикации

METHOD FOR OBTAINING DATA RELATING TO THE ELASTICITY OF MATERIALS, USING TORSIONAL WAVES

Номер: US20190004015A1
Автор: MASSÓ GUIJARRO Paloma, MELCHOR RODRIGUEZ Juan Manuel, RUS CALBORG Guillermo
Принадлежит:

The invention relates to a method or operating mode which, using a device for emitting and receiving sonic and/or ultrasonic torsional waves, can be used to obtain data relating to the consistency or elasticity of quasi-incompressible solid media, preferably quasi-fluids or biological tissues, based on the separation of non-linear parameters. 1. Method for obtaining data relating to the elasticity of materials using torsional waves comprising the following steps of:emitting a sonic or ultrasonic torsional wave train on a specimen;selecting a time window of the received wave, originating from reflection on the specimen;calculating the Fourier transform of the wave function determined by the foregoing selection of time window;extracting the amplitudes from the fundamental harmonics, a, and from at least one of the harmonics of the second order, b, or higher;calculating one or more non-linearity parameters based on the extracted amplitudes of the harmonics.2. Method according to the preceding claim , characterized in that the emitted wave train consists of between 2 and 80 cycles , preferably between 3 and 10 cycles.3. Method according to any of the preceding claims , characterized in that the emitted torsional waves have a signal magnitude greater than 2 mV , more preferably greater than or equal to 5 mV.4. Method according to any of the preceding claims , characterized in that the excitation energy used for generating the wave train , in terms of the maximum amplitude of the preceding sinusoidal wave , is comprised between 0.1 V and 20 V , preferably between 2 and 10 V.5. Method according to any of the preceding claims , characterized in that the sinusoidal excitation frequency is in the range between 100 Hz and 100 kHz , preferably between 500 Hz and 5 kHz.6. Method according to any of the preceding claims , characterized in that the time window commences at the moment after the commencement of the received wave cycles and is associated with a number of cycles ...

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Номер записи: 31
01-01-2015 дата публикации

System and method for filtering noise from acoustic energy from a valve

Номер: US20150006091A1
Автор: Larry Gene Schoonover
Принадлежит: Dresser LLC

Embodiments of systems and methods that can filter acoustic energy from sources remote from the valve. These embodiments utilize signals from sensors that manifest acoustic energy from various locations on and/or about the valves. In one embodiment, the system includes sensors at locations proximate the valve and locations spaced apart from the valve. The system can further process the signals from these locations and, in one example, combines samples of data to form an energy signature of the valve that is effectively free of noise that emanates from upstream and/or downstream of the valve.

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Номер записи: 32
05-01-2017 дата публикации

APPARATUS

Номер: US20170005450A1
Автор: Yamamoto Hiroshi
Принадлежит:

Provided is an apparatus for acquiring object information, the apparatus including: first and second laser output unit outputting first and second pulsed laser; a laser controlling unit configured to control each laser output unit; a first or second detecting unit configured to detect an emission timing of laser and output a first or second detection signal; a probe configured to receive an acoustic wave from an object being irradiated with the laser; and a signal processing unit configured to acquire specific information of the object, based on the acoustic wave. The laser controlling unit controls output of at least one of the laser output units so as to decrease a time difference between subsequent first and second pulsed lasers to be output. 1. An apparatus , comprising:a first and a second laser output unit configured to output a first and a second pulsed laser respectively;a laser controlling unit configured to control the first and the second laser output unit;a first detecting unit configured to detect an emission timing of the first pulsed laser and output a first detection signal; anda second detecting unit configured to detect an emission timing of the second pulsed laser and output a second detection signal, whereinthe laser controlling unit controls output of at least one of the first and the second laser output unit, based on a time difference between the first and the second detection signals.2. The apparatus according to claim 1 , whereinthe laser controlling unit controls output of at least one of the first and the second laser output unit so as to decrease a time difference between subsequent first and second pulsed lasers to be irradiated to the object.3. The apparatus according to claim 1 , whereinthe laser controlling unit controls a temperature of a laser medium of the first laser output unit or the second laser output unit.4. The apparatus according to claim 1 , whereinthe laser controlling unit controls the emission timings of the first and ...

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Номер записи: 33
08-01-2015 дата публикации

ACOUSTIC ISOLATION CHAMBER

Номер: US20150007661A1
Автор: Allen David, Cunningham Michael, Fryar James, Horan Kenneth
Принадлежит:

An acoustic isolation chamber. The chamber comprises a housing defining a volume. A first region of the volume is configured to receive a photoacoustic sensor head. A second region of the volume is configured to receive the UUT. A sound proofing means encompassing at least a portion of the volume. 1. An acoustic isolation chamber comprising:a housing defining a volume,a first region of the volume is configured to receive one or more photoacoustic measurement cells,a second region of the volume is configured to receive a unit under test (UUT), anda sound proofing means encompassing at least a portion of the volume.2. An acoustic isolation chamber as claimed in claim 1 , wherein the sound proofing means comprises a cavity.3. An acoustic isolation chamber as claimed in claim 1 , wherein the sound proofing means comprises a cavity and the cavity is evacuated.4. An acoustic isolation chamber as claimed in claim 1 , further comprising a safety interlock mechanism configured for switching a laser when tripped.5. An acoustic isolation chamber as claimed in claim 1 ,wherein the first region is located in a first compartment and the second region is located in a second compartment; andwherein the acoustic isolation chamber further comprises a third compartment for accommodating utilities therein.6. An acoustic isolation chamber as claimed in claim 5 , further comprising an isolating member located intermediate the second compartment and the third compartment for providing both acoustic and particle isolation of the third compartment from the second compartment.7. An acoustic isolation chamber as claimed in claim 1 , wherein the UUT is mounted on a moveable carrier member operably coupled to a drive means.8. An acoustic isolation chamber as claimed in claim 1 , wherein the UUT is mounted on a moveable carrier member operably coupled to a drive means. the carrier member utilises a vacuum for securing the UUT thereon.9. An acoustic isolation chamber as claimed in claim 1 , ...

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Номер записи: 34
11-01-2018 дата публикации

BIOPSY NEEDLE AND PHOTOACOUSTIC MEASUREMENT APPARATUS

Номер: US20180008243A1
Автор: IRISAWA Kaku, MURAKOSHI Dai
Принадлежит: FUJIFILM Corporation

In a biopsy needle having a hollow tubular outer needle, an inner needle that is disposed in a hollow portion of the outer needle so as to be movable in the tube axis direction relative to the outer needle, and a recessed sample collection portion that is cut inward from a circumferential surface of the inner needle, an inner hole that extends in the longitudinal direction of the inner needle on each of the inner needle distal end side and the inner needle rear end side of the sample collection portion and are opened to the sample collection portion is provided in the inner needle, and a light guide member is disposed in the inner holes. At least a part of the light guide member is fixed by filler filled in the inner holes. 1. A biopsy needle , comprising:a hollow tubular outer needle;an inner needle that is movable in a tube axis direction relative to the outer needle and that is disposed in a hollow tube of the outer needle;a sample collection portion that has a recessed shape and that is provided on a circumferential surface of the inner needle;an inner hole that is provided on each of a distal end side and a rear end side of the sample collection portion in the inner needle and that extends in the tube axis direction of the inner needle;a first light guide member that is disposed in the inner hole and that is disposed from the rear end side of the inner needle to vicinity of the distal end of the inner needle;a first light absorber that absorbs light emitted from a distal end of the first light guide member and emits a photoacoustic wave; anda filler that is filled in the inner hole to fix at least a part of the first light guide member.2. The biopsy needle according to claim 1 ,wherein the first light guide member is fixed to a bottom surface of the sample collection portion by a fixing member that covers at least a part of the first light guide member.3. The biopsy needle according to claim 1 ,wherein a bottom surface of the inner hole and a bottom surface of ...

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Номер записи: 35
27-01-2022 дата публикации

DEFECT INSPECTION APPARATUS AND DEFECT INSPECTION METHOD

Номер: US20220026396A1
Автор: HATAHORI Takahide, Takubo Kenji, Yoshida Koki
Принадлежит: SHIMADZU CORPORATION

A defect inspection apparatus () is provided with and an excitation unit () for exciting elastic waves, an irradiation unit () for emitting laser light, a measurement unit () for measuring interference light, and a control unit (). The control unit is configured to acquire an image () representing a vibration state of an inspection target object () in a measurement area based on a measurement result of the measurement unit (), detect a discontinuous portion in a vibration state in the measurement area from the image representing the vibration state as a defect (), and identify a type of the defect based on at least one of a shape () of the detected defect and the vibration state of a defective portion. 1. A defect inspection apparatus comprising:an excitation unit configured to excite elastic waves in an inspection target object;an irradiation unit configured to emit laser light to a measurement area of the inspection target object in a state in which the elastic waves are excited by the excitation unit;a measurement unit configured to cause the laser light reflected at mutually different positions in the measurement area to interfere with each other to acquire interference light and measure the interference light; anda control unit, the control unit being configured toacquire an image representing a vibration state of the inspection target object in the measurement area based on a measurement result of the measurement unit,detect a discontinuous portion in the vibration state in the measurement area from the image representing the vibration state as a defect, andidentify a type of the defect based on at least one of a shape of the detected defect and the vibration state of a defective portionwherein the image representing the vibration state is a moving image in which a temporal change of a vibration displacement is displayed.2. The defect inspection apparatus as recited in claim 1 ,wherein the control unit is configured toextract an area where the vibration state ...

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Номер записи: 36
08-01-2015 дата публикации

Analysis of Periodic Information in a Signal

Номер: US20150012247A1
Автор: Bowers, III Stewart V., Skeirik Robert D.
Принадлежит: CSI TECHNOLOGY, INC.

A “periodic signal parameter” (PSP) indicates periodic patterns in an autocorrelated vibration waveform and potential faults in a monitored machine. The PSP is calculated based on statistical measures derived from an autocorrelation waveform and characteristics of an associated vibration waveform. The PSP provides an indication of periodicity and a generalization of potential fault, whereas characteristics of the associated waveform indicate severity. A “periodic information plot” (PIP) is derived from a vibration signal processed using two analysis techniques to produce two X-Y graphs of the signal data that share a common X-axis. The PIP is created by correlating the Y-values on the two graphs based on the corresponding X-value. The amplitudes of Y-values in the PIP is derived from the two source graphs by multiplication, taking a ratio, averaging, or keeping the maximum value. 1. A method for analyzing periodic information in a signal associated with a machine or process , the method comprising:(a) acquiring the signal over a time period using a sensor associated with the machine or process;(b) generating an autocorrelation waveform based on the signal;(c) determining a periodic signal parameter value based at least in part on the autocorrelation waveform, the periodic signal parameter value comprising a single real number indicative of a level of periodic information in the signal.2. The method of wherein step (c) comprises determining the periodic signal parameter value based at least in part on a combination of statistical values calculated from the autocorrelation waveform.3. The method of wherein step (c) comprises:(c1) determining a standard deviation of the autocorrelation waveform;(c2) determining a maximum absolute peak amplitude over all of the time period of the autocorrelation waveform;(c3) determining a maximum absolute peak amplitude after the first three percent of the time period of the autocorrelation waveform;(c4) determining a crest factor of ...

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Номер записи: 37
14-01-2016 дата публикации

Nondestructive Inspection Using Acousto-Optics

Номер: US20160011152A1
Автор: Georgeson Gary Ernest
Принадлежит:

A method and apparatus for inspecting an object. The apparatus comprises a vibration generator and an acousto-optical sensor. The vibration generator is positioned relative to a surface of an object. The vibration generator excites the object at a location on the object such that the portion of the object vibrates. The acousto-optical sensor is coupled to the surface of the portion of the object. The acousto-optical sensor detects a vibratory response generated by the portion of the object in response to excitation of the portion of the object and generates an image of the portion of the object based on the vibratory response. 1. An apparatus comprising:a vibration generator positioned relative to a surface of an object, wherein the vibration generator excites the object at a location on the object such that at least a portion of the object vibrates; andan acousto-optical sensor coupled to the surface of the portion of the object, wherein the acousto-optical sensor detects a vibratory response generated by the portion of the object in response to excitation of the portion of the object and generates an image of the portion of the object based on the vibratory response.2. The apparatus of claim 1 , wherein the vibratory response includes a feature response that is produced when a feature is present within the portion of the object and wherein the image of the portion of the object generated based on the feature response includes an indication that visually represents the feature.3. The apparatus of claim 1 , wherein the vibration generator is a mechanical resonator that causes a feature that is present within the portion of the object to resonate when a frequency at which the portion of the object is excited is substantially equal to a natural frequency of the feature within selected tolerances.4. The apparatus of claim 3 , wherein the mechanical resonator excites the portion of the object at ultrasonic frequencies between about 1 kilohertz and about 500 kilohertz ...

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Номер записи: 38
11-01-2018 дата публикации

OBJECT INFORMATION ACQUIRING APPARATUS AND SIGNAL PROCESSING METHOD

Номер: US20180011061A1
Автор: Furukawa Yukio
Принадлежит:

an object information acquiring apparatus comprises a light emission unit configured to emit light beams from a plurality of emission positions; a conversion unit configured to convert acoustic waves generated when an object is irradiated with the light beams emitted by the light emission unit into electric signals; a beam profile acquisition unit configured to acquire information relating to beam profiles of the light beams emitted by the light emission unit, the beam profiles corresponding respectively to the plurality of emission positions; and a characteristic information acquisition unit configured to acquire characteristic information of the object on the basis of the information relating to the beam profiles corresponding to the plurality of emission positions and the electric signals. 1. An object information acquiring apparatus comprising:a light emission unit configured to emit light beams from a plurality of emission positions;a conversion unit configured to convert acoustic waves generated when an object is irradiated with the light beams emitted by the light emission unit into electric signals;a beam profile acquisition unit configured to acquire information relating to beam profiles of the light beams emitted by the light emission unit, the beam profiles corresponding respectively to the plurality of emission positions; anda characteristic information acquisition unit configured to acquire characteristic information of the object on the basis of the information relating to the beam profiles corresponding to the plurality of emission positions and the electric signals.2. The object information acquiring apparatus according to claim 1 , wherein the characteristic information acquisition unit is configured to:acquire information relating to respective light fluence distributions of the light beams emitted from the plurality of emission positions in an interior of the object by using the information relating to the beam profiles corresponding to the ...

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Номер записи: 39
11-01-2018 дата публикации

SYSTEM FOR MONITORING THE CONDITION OF STRUCTURAL ELEMENTS

Номер: US20180011063A1
Автор: Loveday Philip Wayne
Принадлежит:

A system for monitoring the condition of elongate structural elements, for example, railway rails, and a method of designing and manufacturing the system is disclosed. The method includes identifying and selecting suitable modes of propagation and signal frequencies that can be expected to travel large distances through an elongate structural element; designing a transducer that will excite the selected mode at the selected frequency; numerically modelling the transducer as attached to the elongate structural element; validating the transducer design by analysing a harmonic response of the selected mode of propagation to excitation by the transducer, and manufacturing one or more transducers for use in the system. 1. A system for monitoring and detecting cracks or breaks in rails of a railway track , the system including a plurality of transducers defining transmitting and receiving stations of the system , characterised in that the transducers are located on the inner sides of the rails.2. The system of in which the plurality of transducers is in the form of a series of transducers located at predetermined spaced apart positions claim 1 , with at least one transducer provided at each predetermined position claim 1 , and with ultrasonic waves periodically being transmittable along the rail from one transducer used as a transmitter to a spaced apart transducer used as a receiver.3. The system of in which an array of the transducers is located at each predetermined position.4. The system of in which the plurality of transducers is in the form of a series of transducers located at predetermined spaced apart positions claim 1 , with at least one transducer provided at each predetermined position claim 1 , with ultrasonic waves periodically being transmittable along the rail from one transducer used as a transmitter claim 1 , and reflected by a crack in the rail to the same transducer claim 1 , which is also used as a receiver.5. The system of in which an array of the ...

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Номер записи: 40
11-01-2018 дата публикации

Machine Fault Prediction Based on Analysis of Periodic Information in a Signal

Номер: US20180011065A1
Автор: Bowers, III Stewart V., Skeirik Robert D.
Принадлежит: COMPUTATIONAL SYSTEMS, INC.

A “periodic signal parameter” (PSP) indicates periodic patterns in an autocorrelated vibration waveform and potential faults in a monitored machine. The PSP is calculated based on statistical measures derived from an autocorrelation waveform and characteristics of an associated vibration waveform. The PSP provides an indication of periodicity and a generalization of potential fault, whereas characteristics of the associated waveform indicate severity. A “periodic information plot” (PIP) is derived from a vibration signal processed using two analysis techniques to produce two X-Y graphs of the signal data that share a common X-axis. The PIP is created by correlating the Y-values on the two graphs based on the corresponding X-value. The amplitudes of Y-values in the PIP is derived from the two source graphs by multiplication, taking a ratio, averaging, or keeping the maximum value. 1. An apparatus for acquiring and analyzing periodic information in vibration associated with a machine , the apparatus comprising:a vibration sensor securely attached to the machine in a location providing a solid transmission path from a source of vibration within the machine to the vibration sensor, the vibration sensor for generating a vibration signal; an analog-to-digital converter for converting the vibration signal to digital vibration data; and', 'memory for buffering the digital vibration data; and, 'a data collector in communication with the vibration sensor, the data collector configured to receive and condition the vibration signal, the data collector comprising generate an original waveform based on the digital vibration data;', 'perform an autocorrelation function on the original waveform to generate an autocorrelation waveform;', 'perform a Fast Fourier Transform on the original waveform to generate an original spectrum;', 'perform a Fast Fourier Transform on the autocorrelation waveform to generate an autocorrelation spectrum;', 'compile a first list of amplitude peaks from ...

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Номер записи: 41
14-01-2021 дата публикации

Snapshot photoacoustic photography using an ergodic relay

Номер: US20210010976A1
Автор: Lei Li, Lihong Wang, Yang Li
Принадлежит: California Institute of Technology CalTech

A photoacoustic imaging system is disclosed that includes an ergodic relay coupled optically to a light source configured to produce a light pulse and further coupled acoustically to a transducer. The ergodic relay is further configured to direct at least two PA signals to the transducer. Each of the at least two PA signals are produced at different positions within the field of view of the object to be imaged in response to illumination by a single light pulse. The transducer detects each of the at least two PA signals after each of at least two delays that correspond to the position at which each PA signal was produced.

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Номер записи: 42
14-01-2021 дата публикации

SYSTEM IDENTIFICATION DEVICE, SYSTEM IDENTIFICATION METHOD, AND RECORDING MEDIUM

Номер: US20210010980A1
Автор: Inoue Hirofumi, Kikuchi Katsumi, Shinoda Shigeki, Takata Soichiro
Принадлежит: NEC Corporation

A system identification device includes an analysis unit that calculates a self-frequency response function on the basis of an input signal and an output signal measured by a measurement unit at a position where a subject physical system has been excited by a vibrating unit . The analysis unit performs system identification of the subject physical system by using an impulse response function obtained from the calculated self-frequency response function and an impulse response function of a virtual two-degrees-of-freedom model modeling the subject physical system that is the subject of analysis. This makes it possible to perform system identification of systems with close eigenvalues.

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Номер записи: 43
10-01-2019 дата публикации

Method and Apparatus for Non-Destructive Measurement of Modulus of Elasticity and/or the Compressive Strength of Masonry Samples

Номер: US20190011405A1
Автор: Booth James, Brzev Svetlana, Cox Neil, Kennedy Diane, McEwen Bill
Принадлежит:

A method and apparatus for determining the compressive strength of masonry units based on airborne sonic signals generated by stimulating the samples with short duration, mechanical impulses are described. The non-destructive testing apparatus consists of a specimen support unit which mechanically isolates the masonry unit from the environment and from the support, a mechanical stimulator, and an acoustic response detector. The signals recorded are analyzed to extract the pertinent features which are then used to compute the compressive strength of the sample. The pertinent signals are deduced through a calibration of the masonry type being analyzed (material and shape) based on physical analysis of the sample's normal modes of vibration, or through Finite Element Analysis of the vibrations, or through direct empirical calibration. This non-destructive testing method is low-cost, readily implemented and provides a reliable technique for compressive strength estimation. 1. An apparatus for non-destructive measurement of a masonry specimen having prescribed physical attributes , the apparatus comprising:a stimulator arranged to apply a non-destructive stimulus to the specimen that will elicit an acoustic response;a response sensor arranged to capture sonic signals from the acoustic response to said non-destructive stimulus and generate a response signal that is representative of the captured sonic signals;a signal processor operatively associated with the response sensor for receiving the response signal from the response sensor and being arranged to execute programming instructions stored thereon so as to:analyse the response signal and quantify pertinent features of the response signal, andcalculate a compressive strength of the specimen based upon said prescribed physical attributes and the pertinent features quantified by the signal processor.2. The apparatus according to wherein the signal processor quantifies the pertinent features of the response signal ...

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Номер записи: 44
03-02-2022 дата публикации

Component Concentration Measuring Device

Номер: US20220031200A1
Автор: Matsunaga Daichi, Nakamura Masahito, Seyama Michiko, Tanaka Yujiro
Принадлежит:

A measurement unit is attached to a measurement subject and measures acceleration in time series. A body movement calculation unit obtains the magnitude of body movement indicating the magnitude of a motion of the measurement subject based on acceleration measured by the measurement unit. A singular point extraction unit extracts, as a singular point, a time point at which the magnitude of body movement obtained by the body movement calculation unit exceeds a threshold value. A matching unit rectifies a change in a photoacoustic signal between before and after the singular point extracted by the singular point extraction unit. 16.-. (canceled)7. A component concentration measuring device comprising:a light emitting device configured to emit a light beam toward a measurement site of a measurement subject, wherein the light beam has a wavelength that is absorbed by a measurement target substance;a detector configured to detect a photoacoustic signal generated in the measurement site irradiated with the light beam in time series;a measurement device configured to be attached to the measurement subject and measure an acceleration in time series;a body movement calculator configured to obtain a magnitude of body movement of the measurement subject based on the acceleration measured by the measurement device;a singular point extraction circuit configured to extract, as a singular point, a time point at which the magnitude of body movement obtained by the body movement calculator exceeds a first threshold value; anda matching circuit configured to rectify a change in the photoacoustic signal between a time before and a time after the singular point extracted by the singular point extraction circuit.8. The component concentration measuring device according to claim 7 , wherein the matching circuit is configured to subtract an amount of the change in the photoacoustic signal between the time before and the time after the singular point extracted by the singular point ...

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Номер записи: 45
09-01-2020 дата публикации

FINGERPRINTING AND ANALYZING GEMSTONES

Номер: US20200011837A1
Автор: MAGANA Sally Catherine, Rhodes George Wyatt
Принадлежит: GEMOLOGICAL INSTITUTE OF AMERICA, INC. (GIA)

The embodiments disclosed herein relate to the examination of gemstones including diamonds, both cut/polished and rough, using the technology of Resonant Ultrasound Spectroscopy. The resonant frequencies are obtained by mechanically causing the stone to vibrate using a swept sine oscillator, sensing the resonance vibrations, and displaying the spectrum to yield a pattern describing the stone. The resonance fingerprints can be used to both track an individual stone to verify its integrity or to grade a rough stone to establish potential value. 1. A method , comprising: [ 'wherein the first input transducer is contacting a gemstone under evaluation;', 'sending an input signal to a first input transducer,'}, 'wherein the second receiver transducer is contacting the gemstone under evaluation;', 'receiving a resonance signal from a second receiver transducer,'}, 'stepping the input signal through a range of input frequencies;', 'receiving a range of received signals;, 'by a signal generator and a signal processor,'}processing, with algorithms, the range of received signals; andsending the processed range of received signals for the gemstone under evaluation to a computer for storage and display.2. The method of wherein the input signal is sent from the signal generator to the first transducer through an input amplifier; andwherein the received signal is received at the signal processor from the receiver transducer through a receiver amplifier.3. The method of wherein processing the received signal includes in-phase and quadrature components of the received signal.4. The method of wherein the signal processor includes a phase sensitive detector and digital signal processor.5. The method of wherein stepping the input signal through a range of input frequencies is stepped by 1 to 1000 Hz.6. The method of wherein the range of input frequencies is between 0.1 MHz and 4 MHz.7. The method of wherein the signal generator and the signal processor are configured on a chip claim 1 ...

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Номер записи: 46
19-01-2017 дата публикации

SCANNER FOR PHOTO-ACOUSTIC TOMOGRAPHY AND PHOTO-ACOUSTIC TOMOGRAPHY APPARATUS USING SAME

Номер: US20170014031A1
Автор: JEON Man Sik, Kim Chul Hong, Kim Jin Young, LEE Chang Ho, Lim Geun Bae
Принадлежит:

Provided is a scanner for photoacoustic tomography including: a mirror which reflects light and a photoacoustic signal for the photoacoustic tomography; a first driving member which is attached with the mirror; a second driving member which is connected to the first driving member; first driving force supply units which are disposed under two ends of the first driving member in a first direction to exert a driving force for allowing the first driving member to perform tilting movement in the first direction; and second driving force supply units which are disposed under two ends of the second driving member in a second direction to exert a driving force for allowing the second driving member to perform tilting movement in the second direction. 1. A scanner for photoacoustic tomography comprising:a mirror which reflects light and a photoacoustic signal for the photoacoustic tomography;a first driving member which is attached with the mirror;a second driving member which is connected to the first driving member;first driving force supply units which are disposed under two ends of the first driving member in a first direction to exert a driving force for allowing the first driving member to perform tilting movement in the first direction; andsecond driving force supply units which are disposed under two ends of the second driving member in a second direction to exert a driving force for allowing the second driving member to perform tilting movement in the second direction.2. (canceled)3. (canceled)4. (canceled)5. The scanner according to claim 1 ,wherein the first and second driving force supply units are configured with a pair of a permanent magnet and an electromagnet,wherein the permanent magnet and the electromagnet in the pair face each other,wherein one of the permanent magnet and the electromagnet is positioned to be attached to the first and second driving member, and the other is positioned to be separated from the first and second driving member,wherein the ...

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Номер записи: 47
03-02-2022 дата публикации

DISPLACEMENT MEASUREMENT DEVICE AND DEFECT DETECTION DEVICE

Номер: US20220034822A1
Автор: HATAHORI Takahide, Takubo Kenji
Принадлежит:

A displacement measurement device is provided with: a laser light source for emitting laser light to a measurement area R of a measurement target object S; a focusing optical system (the beam splitter , the first reflecting mirror , the condenser lens ) having a front focal point in the measurement area R and a rear focal point on a predetermined imaging surface (the detection surface ); a non-focusing optical system (the beam splitter , the diffuser , the second reflecting mirror , and the condenser lens ) in which light from a measurement area R of a correspondence point in the measurement area corresponding to each point of the imaging surface with respect to the focusing optical system is incident on the point of the imaging surface; and a photodetector (image sensor ) configured to detect light intensity on the imaging surface for each point. Thus, corresponding to each of a large number of points in the measurement area R, main reflected light reflected at the point and reference light reflected at the surrounding range of the point are incident on each of a large number of points in the imaging surface, and the main reflected light and the reference light interfere at a large number of points in the imaging surface. Thus, an interference pattern is obtained. 1. A displacement measurement device comprising:a laser light source configured to emit laser light to a measurement area on a surface of a measurement target object;a focusing optical system having a front focal point in the measurement area and a rear focal point on a predetermined imaging surface;a non-focusing optical system in which light from a surrounding range of a correspondence point in the measurement area corresponding to each point of the imaging surface with respect to the focusing optical system is incident on the point of the imaging surface; anda photodetector configured to detect light intensity on the imaging surface for each point.2. The displacement measurement device as recited in ...

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Номер записи: 48
03-02-2022 дата публикации

TESTING DEVICE

Номер: US20220034851A1
Автор: IKEDA Takayuki, Shishido Hideaki
Принадлежит: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

A cost of a testing device is reduced. A structure of a testing device is simplified. A testing device capable of testing with higher accuracy is provided. A testing device () has a structure including a sending unit (), a receiving unit (), a control unit (), and a display (). The control unit includes a memory portion () and an arithmetic portion (). The sending unit has a function of generating a pulse signal for a probe () to generate an ultrasonic wave (). The receiving unit has a function of generating a first signal including a first analog data (D) on the basis of the input single input from the probe. The memory portion has a function of storing the first analog data. The arithmetic portion has a function of generating an image signal (S0) output to the display on the basis of the first analog data stored in the memory portion. The display has a function of displaying an image based on the image signal. 1. A testing device comprising a sending unit , a receiving unit , a control unit , and a display ,wherein the control unit comprises a memory portion and an arithmetic portion,wherein the sending unit has a function of outputting a pulse signal for a probe to generate an ultrasonic wave,wherein the receiving unit has a function of generating a first signal including a first analog data on the basis of an input signal input from the probe and outputting it to the control unit,wherein the memory portion has a function of storing the first analog data,wherein the arithmetic portion has a function of generating an image signal output to the display on the basis of the first analog data stored in the memory portion, andwherein the display has a function of displaying an image based on the image signal.2. The testing device according to claim 1 ,wherein the receiving unit comprises an amplifier portion, andwherein the amplifier portion has a function of amplifying a potential of the input signal and generating a potential of the first analog data.3. The testing ...

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Номер записи: 49
17-01-2019 дата публикации

Photoacoustic gas detection

Номер: US20190017966A1
Автор: Angelo SAMPAOLO, Gregory Ham, Sebastian Csutak, Weichang Li
Принадлежит: Saudi Arabian Oil Co

A downhole system includes a quartz enhanced photoacoustic spectrometer (QEPAS) configured to be positioned within a wellbore formed in a subterranean zone of a hydrocarbon formation, a sampling system coupled to the QEPAS, and a computer system connected to the QEPAS. The sampling system is configured to be positioned in the wellbore and obtain a sample of a wellbore fluid at a downhole location in the subterranean zone. The QEPAS is configured to spectroscopically scan the sample and to determine a plurality of quantities of a corresponding plurality of hydrocarbons in the same. The computer system includes one or more processors to perform operations including receiving the plurality of quantities of the plurality of hydrocarbons in the sample and determining a plurality of ratios, where each ratio is a ratio of one of the plurality of hydrocarbons with another of the plurality of hydrocarbons.

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Номер записи: 50
21-01-2021 дата публикации

PHOTOACOUSTIC EXPLOSIVES DETECTORS

Номер: US20210018466A1
Автор: Barcelo Steven, Shkolnikov Viktor
Принадлежит:

The present disclosure is drawn to a photoacoustic explosives detector, including a sample chamber, an aerosolizing ejector, a light source, and a pressure differential sensor. The sample chamber can include a photoreaction region, and the aerosolizing ejector can be positioned to eject 3 pL to 10 nL droplets of a liquid sample into the photoreaction region. A light source can be directed to emit focused light through the photoreaction region, and a pressure differential sensor can be positioned with respect to the photoreaction region to sense degradation of the droplets exposed to the focused light. 1. A photoacoustic explosives detector , comprising:a sample chamber including photoreaction region;an aerosolizing ejector positioned to eject 3 pL to 10 nL droplets of a liquid sample into the photoreaction region;a light source directed to emit focused light through the photoreaction region; anda pressure differential sensor positioned with respect to the photoreaction region to sense degradation of the droplets exposed to the focused light.2. The photoacoustic explosives detector of claim 1 , wherein the aerosolizing ejector comprises a thermal fluid jet ejector claim 1 , a piezoelectric fluid ejector claim 1 , an acoustic fluid detector claim 1 , an ultrasonic droplet generator claim 1 , or a nebulizer.3. The photoacoustic explosives detector of claim 2 , wherein the aerosolizing ejector is the thermal fluid jet ejector having a jetting frequency of 1 kHz to 50 kHz.4. The photoacoustic explosives detector of claim 1 , wherein an interior volume of the sample chamber is from 0.001 mmto 1 cm claim 1 , and the photoreaction region is within the interior volume.5. The photoacoustic explosives detector of claim 1 , wherein the light source includes a scanning wavelength laser claim 1 , a xenon lamp or a mercury lamp claim 1 , a scanning electron beam emitter claim 1 , glow bar claim 1 , black body emitter claim 1 , or a light-emitting diode.6. The photoacoustic ...

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Номер записи: 51
17-04-2014 дата публикации

METHOD FOR THE DYNAMIC QUANTITATIVE CHARACTERIZATION OF THE AGEING OF SOLID MATERIALS

Номер: US20140107945A1
Автор: Gregori Giovanni
Принадлежит:

A method, starting from acoustic emission signals of a material under examination, for determining parameters dynamically characterizing an ageing state of a material is described. The method focuses on solid material properties that are widely sub-microscopic and as such are non-observable by any other known experimental method. 1. A method for a quantitative dynamic characterization of an ageing of a material , to which at least one acoustic transducer is applied , which is dedicated to a corresponding pre-defined acoustic oscillation frequency ν to provide an acoustic emission signal AE emitted by the material in a pre-defined time interval , the AE emission signal provided by each acoustic transducer being composed by a discrete series of rms values f(t) of electrical potential values as measured at subsequent time points twith j=0 , 1 , 2 , . . . , which are spaced apart by a time interval Δt that is pre-determined as a function of the material and the wished speed of analysis of the same material , the method comprising execution of the following analysis steps of the AE acoustic emission signals:{'sub': 'j', 'claim-text': a process of elementary material collapsing or leak domain,', 'a time sequence of the outliers denoting a time evolution of the leak domains associated to frequency ν, and', 'a state change occurring in the material;, 'A. finding outliers of said AE emission signal for each frequency ν, each outlier indicating a tail in a statistical distribution of the values f(t) and therefore indicating{'sub': 'j', 'B. starting from said discrete series of values f(t), removing from said values the outliers as found in step A, and constructing a hammer diagram;'}{'sub': h', 'h, 'C. calculating a function of a hammer index H(t) at time instants t=1, 2, 3, . . . , from the hammer diagram in step B, wherein the hammer index only assumes either value +1, representing an average anti-clockwise curvature in a trajectory described by the hammer diagram and ...

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Номер записи: 52
28-01-2016 дата публикации

MANAGING A SOUND SYSTEM

Номер: US20160025683A1
Автор: Davis Mark Charles
Принадлежит:

For managing a sound system, a method is disclosed that includes identifying a location for measuring sound, directing light from a light emitter to the location, determining a speckle pattern at the location based on data received from an optical interferometer, and adjusting a sound producer based on the determined speckle pattern. 1. An apparatus comprising:a light emitter;an optical interferometer;a location module that identifies a location for measuring sound, the location module directing light from the light emitter to the location;a detection module that determines a speckle pattern at the location based on data received by the optical interferometer; anda sound module that adjusts a sound producer based on the determined speckle pattern.2. The apparatus of claim 1 , wherein the sound module adjusts two or more sound producers to balance a sound level measured at the location.3. The apparatus of claim 1 , wherein the location module determines the location by identifying a person at the location.4. The apparatus of claim 1 , wherein the sound module adjusts the sound producer in response to an event selected from the group consisting of a change in volume claim 1 , beginning playback of media content claim 1 , a change in one or more of the locations claim 1 , a change in one or more sound producers claim 1 , and a command from a user.5. The apparatus of claim 1 , wherein the sound module adjusts the sound producer with a modification selected from the group consisting of phase claim 1 , volume claim 1 , direction claim 1 , and balance.6. The apparatus of claim 1 , wherein the sound module adjusts two or more sound producers operating as part of a sound system in a room for media presentations.7. The apparatus of claim 1 , wherein the sound module notifies a user in response to adjusting a sound producer outside a threshold range.8. A method comprising:identifying a location for measuring sound;directing light from a light emitter to the location; ...

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Номер записи: 53
26-01-2017 дата публикации

METHOD AND APPARATUS FOR CHARACTERIZING A MEDIUM USING ULTRASOUND MEASUREMENTS

Номер: US20170023532A1
Автор: BOUVET Francois Louis Denis Marie, CROZAT Sophie, PIERRE Guillaumeé Lucien Gérard, van Neer Paul Louis Maria Joseph, Volker Arno Willem Frederik
Принадлежит: Sonaxis S.A.

Properties of a medium, such as its particle size distribution, are characterized using a measurement cell containing a medium between walls of the cell, with ultrasound transducers on opposite walls. Ultrasound is transmitted from the ultrasound transducers on both sides and transmission and reflection responses are detected. An ultrasound frequency dependent ratio of a Fourier transform value of a product of signals obtained from transmission responses in opposite directions and a Fourier transform value of a product of signals obtained from reflections at the transducers is computed. Preferably, the first received reflected and transmitted pulses in response to pulse excitation are used to compute the ratio. Ultrasound frequency dependent ultrasound speed and/or attenuation data of ultrasound in the medium are computed as a function of the ultrasound frequency from the ratio. This eliminates the effect of the walls. 1. A method of ultrasound reflection measurement using a measurement cell containing a medium and a first ultrasound transducer and a second ultrasound transducer on mutually opposite first and second walls of the cell respectively , the method comprisingtransmitting ultrasound from the first ultrasound transducer to the second ultrasound transducer and vice versa, through the walls of the measurement cell and the medium between the walls;detecting a first and second reflection response using the first and second ultrasound transducer respectively in response to their own transmissions;using the second and first ultrasound transducer to detect a first and second transmission response to the ultrasound using transmitted by the first and second ultrasound transducer respectively;computing an ultrasound frequency dependent ratio of a Fourier transform value of a product of signals obtained from the first and second transmission response and a Fourier transform value of a product of signals obtained from the first and second reflection response;computing ...

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Номер записи: 54
28-01-2021 дата публикации

OPTOACOUSTIC PROBE

Номер: US20210022680A1
Автор: Do Tam Thien, Harris Jeffrey Nelson, Richards Cook Lisa Michelle, Saenz Xavier Rey
Принадлежит: Seno Medical Instruments, Inc.

An optoacoustic probe for optoacoustic imaging of a volume, the optoacoustic probe having a distal end operable to contact the volume and a proximal end. The optoacoustic probe includes at least one primary light source and an auxiliary light source that is configured to generate auxiliary light carried through an optical window to a volume. A detection device is configured to detect signals generated from the auxiliary light or primary light reflecting from the volume or the optical window. A microcontroller including one or more processors is also provided, that receives the signals generated from the auxiliary light reflecting from the volume from the detection device, determines contact between the volume and the optoacoustic probe based on the auxiliary light reflecting from the volume, and prevents the at least one primary light source from generating light until the optoacoustic probe is contacting the volume. 1. An optoacoustic probe for optoacoustic imaging of a volume , the optoacoustic probe having a distal end operable to contact the volume and a proximal end , the optoacoustic probe comprising:at least one primary light source configured to generate light that is transmitted along a light path to generate optoacoustic return signals when the light reacts with the volume;a transducer assembly including a transducer configured to receive the optoacoustic return signals and an acoustic lens provided over the transducer;an optical window configured to carry light along the light path to the volume;an auxiliary light source configured to generate auxiliary light carried through the optical window to the volume;a detection device configured to detect signals generated from the auxiliary light or primary light reflecting from the volume or the optical window; and receive the signals generated from the auxiliary light reflecting from the volume from the detection device;', 'determine contact between the volume and the optoacoustic probe based on the auxiliary ...

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Номер записи: 55
28-01-2021 дата публикации

METHOD AND SYSTEM FOR NON-CONTACT BIO-SIGNAL DETECTION USING ULTRASOUND SIGNALS

Номер: US20210022713A1
Автор: Chakravarty Tapas, Khasnobish Anwesha, Rakshit Raj, SINHARAY Arijit
Принадлежит: TATA CONSULTANCY SERVICES LIMITED

This disclosure relates generally to bio-signal detection, and more particularly to method and system for non-contact bio-signal detection using ultrasound signals. In an embodiment, the method includes acquiring an in-phase I(t) baseband signal and a quadrature Q(t) baseband signal associated with an ultrasound signal directed from the sensor assembly towards the target. Magnitude and phase signals are calculated from the in-phase and quadrature baseband signals, and are filtered by passing through a band pass filter associated with a predefined frequency range to obtain filtered magnitude and phase signals. Fast Fourier Transformation (FFT) of the filtered magnitude and phase signals is performed to identify frequency of dominant peaks of spectrum of the magnitude and phase signals in the ultrasound signal. Value of the bio-signal associated with the target is determined based on weighted values of the frequency of the dominant peaks of the magnitude and phase signals. 2. The processor implemented method of claim 1 , wherein the bio-signal comprises one of a heart rate and breath rate of the target.3. The processor implemented method of claim 2 , wherein the predefined frequency range of the band pass filter for heart rate is about 0.9-3 Hz claim 2 , and the predefined frequency range of the band pass filter for the breath rate is about 0.2-0.9 HZ.4. The processor implemented method of claim 1 , wherein the in-phase baseband signal and the quadrature baseband signal are acquired using a sensor assembly located in a line-of-sight of the target claim 1 , and wherein the sensor assembly comprises a first transducer for excitation of the target with the ultrasound signal and a second transducer for receiving a reflected signal from the target.5. The processor implemented method of claim 1 , wherein the magnitude and phase signals are obtained from the In-phase I(t) and the quadrature Q(t) baseband signals using the equations:{'br': None, 'i': I', 't', 'Q', 't, ' ...

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Номер записи: 56
23-01-2020 дата публикации

Far-field optical super-resolution microscopy method

Номер: US20200025682A1
Автор: Feng Li, Honglian GUO
Принадлежит: South China University of Technology SCUT

The present invention discloses a far-field optical super-resolution microscopy method, and particularly relates to an optical super-resolution microscopy method for micro-structures on the surface of a sample. The present invention measures the vibration modes of different micro-samples via a laser interference vibrometer, and utilizes different eigen-vibration frequencies of the micro-structures on the surface of the sample to render, under the cooperation of a sub-nanometer two-dimensional displacement scanning translation stage, a high-resolution spatial position, an excitation frequency vibration spectrum and an image pattern, thus realizing super-resolution microscopy imaging. Since the present invention utilizes the different vibration frequencies of the micro-structures on the surface of the sample to perform marking, and adopts a laser to excite and detect the vibration of the micro-structures, the method has the characteristics of causing no mark, no damage and no contamination to the sample.

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Номер записи: 57
28-01-2021 дата публикации

REMOTE WIDE BANDWIDTH ULTRASONIC INSPECTION METHOD AND APPARATUS

Номер: US20210025853A1
Автор: Safai Morteza
Принадлежит:

Methods, systems, and apparatuses are disclosed for non-destructively inspecting a substrate by measuring the Doppler effect in sound waves comprising wide bandwidth ultrasound wavelengths generated from a piezoelectric polymer coating material with the sound waves read by a laser in communication with a Doppler velocity meter. 1. A method for non-destructively inspecting a substrate comprising:applying a piezoelectric polymer coating material to a substrate, said substrate comprising a substrate surface;orienting at least one electrode in communication with the piezoelectric polymer coating material;applying a current from a power source to the electrode;generating sound waves from the piezoelectric polymer coating material, said sound waves comprising wide bandwidth ultrasound wavelengths;transmitting a read beam from a laser, said laser positioned remotely from the substrate at a predetermined distance away from the substrate, and wherein said read beam engages the wide bandwidth ultrasound wavelengths;reflecting the read beam from the substrate to form a reflected read beam;receiving the reflected read beam at a receiver, said receiver configured to be in communication with the laser, wherein the reflected read beam comprises a reflected beam signal;interpreting the reflected read beam by generating a read beam signal from the receiver; anddetermining a characteristic of the substrate based upon the read beam signal.2. The method of claim 1 , wherein the receiver is in communication with a Doppler velocity meter claim 1 , and wherein the characteristic of the substrate determined based upon the read signal beam comprises determining an amount of Doppler shift.3. The method of claim 1 , further comprising:{'b': '202', 'non-destructively determining a presence of anomalies in the substrate by comparing a known wide bandwidth ultrasound wavelength to a wide bandwidth ultrasound signal read by the read beam and received by the receiver.'}4. The method of wherein the ...

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Номер записи: 58
28-01-2021 дата публикации

METHOD AND DEVICE FOR MAPPING COMPONENTS FOR DETECTING ELONGATION DIRECTION

Номер: US20210025855A1
Автор: BAELDE Aurelien, JENSON Frederic, PRADA Claire
Принадлежит:

The invention concerns a method for the non-destructive mapping of a component, in order to determine an elongation direction of the elongate microstructure of the component at at least one point of interest, characterised in that it comprises at least two successive intensity measurement steps comprising the following steps: a sub-step of rotating a linear transducer into a plurality of angular positions, said linear transducer comprising a plurality of transducer elements, a sub-step of emitting a plurality of elementary ultrasonic beams at each angular position, a sub-step of measuring a plurality of backscattered signals resulting from the backscattering of the elementary ultrasonic beams by said elongate microstructure, the intensity measurement steps making it possible to obtain two series of intensities measured according to two axes of rotation, and in that the method comprises a step of combining the measured series of intensities so as to determine the elongation direction of the microstructure at said at least one point of interest. 1. Method for the non-destructive mapping of a component comprising an elongated microstructure , to determine an elongation direction of the elongated microstructure at at least one point of interest of the component , wherein said method includes at least two successive intensity measurement steps comprising the following steps:a sub-step of rotating a linear transducer in a plurality of angular positions each defining an angle of rotation about an axis of rotation passing through said at least one point of interest, said linear transducer extending along a main plane and comprising a plurality of transducer elements aligned along a main direction of said linear transducer,a sub-step of emitting a plurality of elementary ultrasonic beams at each angular position by each of said plurality of transducer elements in the direction of said point of interest,a sub-step of measuring by each of said plurality of transducer elements ...

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Номер записи: 59
29-01-2015 дата публикации

SURFACE AND SUBSURFACE DETECTION SENSOR

Номер: US20150029819A1
Автор: Yacoubian Araz
Принадлежит:

A sensor can include a plurality of imaging components configured to perform (1) subsurface imaging by acoustical excitation and optical detection, and (2) interferometric surface topographic measurement.

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Номер записи: 60
28-01-2021 дата публикации

METHOD FOR DETECTING THE SPLITTING OF A SUBSTRATE WEAKENED BY IMPLANTING ATOMIC SPECIES

Номер: US20210028036A1
Автор: Ben Mohamed Nadia, Kononchuk Oleg, Landru Didier, Mazen Frederic, Rieutord François
Принадлежит:

A method for monitoring a heat treatment applied to a substrate comprising a weakened zone formed by implanting atomic species for splitting the substrate along the weakened zone, the substrate being arranged in a heating chamber, the method comprising recording sound in the interior or in the vicinity of the heating chamber and detecting, in the recording, a sound emitted by the substrate during the splitting thereof along the weakened zone. A device for the heat treatment of a batch of substrates comprises an annealing furnace comprising a heating chamber intended to receive the batch, at least one microphone configured to record sounds in the interior or in the vicinity of the heating chamber, and a processing system configured to detect, in an audio recording produced by the microphone, a sound emitted when a substrate splits. 1. A method for monitoring a heat treatment applied to a substrate comprising a weakened zone formed by implanting atomic species for splitting the substrate along the weakened zone , the substrate being located in a heating chamber , the method comprising recording sound in the interior or in the vicinity of the heating chamber and detecting , in the recording , a sound emitted by the substrate during the splitting thereof along the weakened zone.2. The method of claim 1 , wherein the recording is made with a microphone located in the interior of the heating chamber.3. The method of claim 1 , wherein the recording is made with a microphone arranged on an exterior wall of an annealing furnace containing the heating chamber.4. The method of claim 1 , wherein the recording is made with a microphone located between a thermal screen and a door of an annealing furnace allowing access to the heating chamber.5. The method of claim 1 , wherein the recording is made with a microphone located in a tube that opens onto the interior of the heating chamber.6. The method of claim 1 , further comprising claim 1 , from the recording of the sound in the ...

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Номер записи: 61
02-02-2017 дата публикации

PHOTOACOUSTIC APPARATUS, CONTROL METHOD OF PHOTOACOUSTIC APPARATUS, AND SUBJECT HOLDING MEMBER FOR PHOTOACOUSTIC APPARATUS

Номер: US20170030866A1
Автор: Yamamoto Hiroshi
Принадлежит:

A photoacoustic apparatus that reduces the possibility of unnecessary high density light entering the eyes of a subject and/or an operator when photoacoustic measurement is not performed includes a holding unit that holds a subject, a light irradiation unit that irradiates the subject with light via the holding unit, and a probe that receives an acoustic wave propagated from the subject, wherein the holding unit includes a light diffusion surface that diffuses the light and of which a degree of diffusion of the light is lowered when an acoustic matching material is applied thereto. 1. A photoacoustic apparatus comprising:a holding unit configured to hold a subject;a light irradiation unit configured to irradiate the subject with light via the holding unit; anda probe configured to receive an acoustic wave propagated from the subject,wherein the holding unit includes a light diffusion surface that diffuses the light and of which a degree of diffusion of the light is lowered when an acoustic matching material is applied thereto.2. The photoacoustic apparatus according to claim 1 , wherein surface roughness of the light diffusion surface is greater than or equal to 20 nm.3. The photoacoustic apparatus according to claim 1 , wherein when a sampling frequency and a number of sampling points in a case that the probe receives the acoustic wave and a sound speed of the acoustic matching material are respectively defined as f claim 1 , N claim 1 , and c claim 1 , andwherein surface roughness of the light diffusion surface is less than or equal to N·c/f.4. The photoacoustic apparatus according to claim 1 , wherein surface roughness of the light diffusion surface is less than or equal to 1.5 mm.5. The photoacoustic apparatus according to claim 1 , further comprising a removal unit configured to remove the acoustic matching material applied to the light diffusion surface.6. The photoacoustic apparatus according to claim 5 , wherein the removal unit dries the acoustic matching ...

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Номер записи: 62
17-02-2022 дата публикации

DEVICE AND METHOD FOR TESTING A TEST OBJECT

Номер: US20220050084A1
Автор: FISCHER Lukas Balthasar, PANZER Nils, ROHRINGER Wolfgang
Принадлежит:

The invention comprises a device () for testing a test object (), comprising an excitation system () for generating broadband ultrasound pulses (′) in the test object, a detection system () for detecting ultrasound waves (), which are generated through the broadband ultrasound pulses (′) in the test object () and emitted by the test object (). The device () comprises a processing unit () for processing the detected ultrasound waves (), while the excitation system () being one of a thermoacoustic emitter or a pulsed laser and the detection system () is a broadband detection system. The excitation system () comprises a modulator () for modulating the broadband ultrasound pulses (′). Furthermore, the invention comprises a method for testing a test object. 1101002002503004004014024034044013113213243313413201202203204202112122132142112112212312412401402403404404014024034044030130330430211212213214211311321324331341320120220320420131132132433134131111112112212312412. Device (; ; ; ; ; ) for testing a test object (; ; ; ; ) , comprising an excitation system (; ; ; ; ; ) for generating broadband ultrasound pulses in the test object , a detection system (; ; ; ; ) for detecting ultrasound waves (; ; ; ; ) which are generated through the broadband ultrasound pulses (′; ′; ′; ′; ′) in the test object (; ; ; ; ) and emitted by the test object (; ; ; ; ) , a processing unit (; ; ; ) for processing the detected ultrasound waves (; ; ; ; ) , the excitation system (; ; ; ; ; ) being one of a thermoacoustic emitter or a pulsed laser , the detection system (; ; ; ; ) is a broadband detection system and the excitation system (; ; ; ; ; ) comprises a modulator (; ) for modulating the broadband ultrasound pulses (′; ′; ′; ′; ′).21010020025030040030130330430211212213214211211221231241230130330430131132132433134132012022032042012112212312412. Device (; ; ; ; ; ) according to claim 1 , characterized in that the processing unit (; ; ; ) is able to execute a correlation between a reference ...

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Номер записи: 63
01-05-2014 дата публикации

ACOUSTIC SIGNAL RECEIVING APPARATUS AND IMAGING APPARATUS

Номер: US20140118749A1
Автор: Asao Yasufumi, Nakajima Takao
Принадлежит: CANON KABUSHIKI KAISHA

There is used an acoustic signal receiving apparatus including a wavelength-tunable light source for irradiating measurement light, a controller for controlling a wavelength of the measurement light, a Fabry-Perot probe having a first mirror on a side where the measurement light enters, a second mirror on a side where an elastic wave from an object enters, and a spacer film positioned between the first and second mirrors and deforms in response to the elastic wave, an array photosensor for detecting a reflected light amount of the measurement light by the Fabry-Perot probe, and a signal processor for acquiring an intensity of the incident elastic wave based on a change in the reflected light amount. The controller sweeps the wavelength of the measurement light, and the signal processor determines the wavelength based on the reflected light amount at each wavelength subjected to the sweep. 1. An acoustic signal receiving apparatus comprising:a wavelength-tunable light source for irradiating measurement light;a controller for controlling a wavelength of the measurement light;a Fabry-Perot probe including a first mirror positioned on a side where the measurement light enters, a second mirror positioned on a side where an elastic wave from an object enters, and a spacer film that is positioned between the first and second mirrors and deforms in response to the entrance of the elastic wave;an array photosensor for detecting a reflected light amount of the measurement light by the Fabry-Perot probe; anda signal processor for acquiring an intensity of the elastic wave having entered the Fabry-Perot probe based on a change in the reflected light amount resulting from the deformation of the spacer film, whereinthe controller sweeps the wavelength of the measurement light, andthe signal processor determines, based on the reflected light amount at each position of the Fabry-Perot probe that is acquired at each wavelength subjected to the sweep, the wavelength of the ...

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Номер записи: 64
31-01-2019 дата публикации

Fluid consumption meter with noise sensor

Номер: US20190033261A1
Автор: Jens Lykke Sørensen, Martin Christian Høj Petersen, Peter Schmidt Laursen, René Gajda Kristensen, Soren Tonnes Nielsen
Принадлежит: Kamstrup AS

A consumption meter, e.g. a water or heat meter, for measuring a flow rate of a fluid supplied in a flow tube. First and second ultrasonic transducers are arranged at the flow tube for transmitting and receiving ultrasonic signals transmitted through the fluid and operated by a flow measurement sub-circuit for generating a signal indicative of the flow rate of the fluid. A noise measurement sub-circuit operates a sensor arranged at the flow tube for detection of acoustic signals of the flow tube, and being arranged to generate a signal indicative of a noise level of the flow tube accordingly. This sensor may comprise a separate transducer, or the sensor may be constituted by one or both of the first and second ultrasonic transducers. The consumption meter may communicate data representative of the noise level via a communication module along with data consumed amount of water, heat etc. Such consumer noise level measurement at the consumer site allows collection of noise level data to assist in locating fluid leakages in a fluid supply pipe system.

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Номер записи: 65
09-02-2017 дата публикации

OBJECT INFORMATION ACQUIRING APPARATUS AND CONTROL METHOD FOR THE OBJECT INFORMATION ACQUIRING APPARATUS

Номер: US20170035300A1
Автор: Watanabe Tadaki
Принадлежит:

An object information acquiring apparatus comprises a receiver receiving an acoustic wave propagating inside an object and convert the acoustic wave into an electric signal; a scanning unit configured to causing the receiver to scan the object; a control unit configured to controlling operation of the scanning unit; a detection unit configured to detecting a status of the acoustic wave reception; and a processing unit for acquiring characteristic information on the inside of the object on the basis of the electric signal, wherein the control unit decides whether or not the operation of the scanning unit is changed, on the basis of a result of detection by the detection unit. 1. A photoacoustic apparatus comprising:a receiver that receives an acoustic wave from an object and converts the acoustic wave into an electric signal;a controller that controls an acoustic wave reception operation using the receiver;a detector that detects an error; anda processor that acquires characteristic information on the inside of the object on the basis of the electric signal,wherein the controller determines whether or not to change the acoustic wave reception operation on the basis of detection of an error by the detector.2. The photoacoustic apparatus according to claim 1 , wherein claim 1 , in a case in which the detector detects an error that influences the acoustic wave reception claim 1 , the controller determines whether or not to continue the acoustic wave reception operation depending on a content of the error.3. The photoacoustic apparatus according to claim 2 , further comprising:a scanner that moves the receiver relative to the object,wherein, in a case in which the controller determines to continue the acoustic wave reception operation, the controller determines a position to which the receiver is moved from a position where the acoustic wave is received when the error occurred.4. The photoacoustic apparatus according to claim 3 , wherein the controller resumes the ...

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Номер записи: 66
04-02-2021 дата публикации

SYSTEMS AND METHODS OF CAPTURING TRANSIENT ELASTIC VIBRATIONS IN BODIES USING ARRAYS OF TRANSDUCERS FOR INCREASED SIGNAL TO NOISE RATIO AND SOURCE DIRECTIONALITY

Номер: US20210033567A1
Автор: Burks Brian M., Ziola Steven M.
Принадлежит: HEXAGON TECHNOLOGY AS

Provided herein are systems and methods for real time processing of signals from an array of transducers for detecting transient elastic waves originating from unknown locations in a body, which may propagate in a dispersive fashion. The systems and methods allow real time combination and analysis of signals, including decisions regarding storage as new data is received. The methods described herein include designing arrays of detectors and methods for processing signals in real time given the constraints of the body under test determining whether to store the set of information while a new set of information is received for processing within a real time environment. The methods described herein include methods which result in the determination or small time shifts which place all signals into a coherent time base which are then combined achieving a composite waveform that possesses an increased signal-to-noise ratio over any single element. 1. A method comprising:determining in real time whether to store in a computer memory a first set of samples from a plurality of signals from a multi-element transducer array that is coupled to a body of material under test within a real time processing environment, wherein:(a) the first set of samples represents a first time range and ends with a first boundary set of samples that are later also processed along with a second set of samples representing the plurality of signals for a second time range possessing a necessary overlap at the end of the first time range, thereby creating an overlapping plurality of processed samples including samples that are processed with the first set of samples and processed with the second set of samples; i. sensed by a first portion of the multi-element transducer array during the first time range; and', 'ii. sensed by a second portion of the multi-element transducer array during the second time range;, '(b) wherein the overlapping plurality of processed samples is sufficient to capture in the ...

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Номер записи: 67
05-02-2015 дата публикации

Photoacoustic measurement device and probe for photoacoustic measurement device

Номер: US20150038825A1
Автор: Takeya Abe
Принадлежит: Fujifilm Corp

An object of the invention is to reduce the size of a probe for a photoacoustic measurement device. A light guide 71 is arranged such that one of a two side surfaces 71 a is closer to a probe axis C which faces a subject than the other side surface and a light emission end surface 71 c is closer to the probe axis C than a light incident end surface 71 b when the probe is used. When a refractive index of the light guide 71 with respect to the light is n1 and a refractive index of a medium around the light guide with respect to the light during photoacoustic measurement is n2 (n2<n1), the light emission end surface 71 c is obliquely formed such that an angle α[°] (where 90°−arcsin(n2/n1)<α<90°) is formed between the light emission end surface 71 c and the side surface 71 a.

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Номер записи: 68
08-02-2018 дата публикации

ULTRASOUND PROBE

Номер: US20180035975A1
Автор: ABE Takeya, TSUJITA Kazuhiro
Принадлежит: FUJIFILM Corporation

An optical fiber guides light output from a light source to an ultrasound probe. The ultrasound probe includes a light guiding section that guides the light from a light input end, which is optically coupled with the optical fiber to a light output end provided in the vicinity of ultrasonic transducers. The light guiding section has a first light guiding portion that includes the light input end, and a second light guiding portion that includes the light output end. The first light guiding portion is formed by glass, and magnifies input light. The second light guiding portion is formed by resin, and emits the light toward a subject from the light output end. 1. A probe , comprising:an optical transmission portion that guides light emitted from a light source to a probe main body;a light guiding section that guides light from a light input end, which is optically coupled with the optical transmission portion, to a light output end; anda detecting portion that detects photoacoustic waves that are generated within a subject due to light guided by the light guiding section being emitted onto the subject,the light guiding section including:a first light guiding portion that includes the light input end, that guides input light from the light input end toward the light output end, and that enlarges a cross sectional area of the input light, at an output end of the first light guiding portion; anda second light guiding portion that includes the light output end, that guides light guided by the first light guiding portion to the light output end, and that emits light from the light output end toward the subject, anda light diffusing surface being formed at an end surface of the second light guiding portion toward a light input side thereof.2. The probe as defined in claim 1 , wherein a detecting surface of the detecting portion and the light output end of the light guiding section are in the same plane.3. The probe as defined in claim 1 , wherein the first light guiding ...

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Номер записи: 69
09-02-2017 дата публикации

BOX-IN-BOX GAS SENSOR HOUSING

Номер: US20170038343A1
Автор: Barjatya Amit, Dandekar Chinmaya Rajiv, Khandelwal Taruna, KSHIRSAGAR ABHIJEET VIKRAM, Tripathy Shalini
Принадлежит:

A housing for a gas sensor module is described herein. The housing can include an outer portion and an inner portion disposed within the outer portion. The outer portion can include at least one wall forming a first cavity. The outer portion can also include an inlet tube coupling feature disposed at a first location in the at least one first wall, and an outlet tube coupling feature disposed in a second location in the at least one first wall. The inner portion can include at least one second wall forming a second cavity, and a distribution channel coupling feature disposed at a third location in the at least one second wall. The inner portion can also include a receiving channel coupling feature disposed in a fourth location and a tuning fork coupling feature disposed at a fifth location in the at least one second wall. 1. A housing for a gas sensor module , the housing comprising: at least one first wall forming a first cavity;', 'an inlet tube coupling feature disposed at a first location in the at least one first wall, wherein the first location is adjacent to the first cavity;', 'an outlet tube coupling feature disposed in a second location in the at least one first wall, wherein the second location is adjacent to the first cavity; and, 'an outer portion comprising at least one second wall forming a second cavity;', 'a distribution channel coupling feature disposed at a third location in the at least one second wall, wherein the third location is adjacent to the second cavity;', 'a receiving channel coupling feature disposed in a fourth location in the at least one second wall, wherein the fourth location is adjacent to the second cavity; and', 'a tuning fork coupling feature disposed at a fifth location in the at least one second wall, wherein the fifth location is adjacent to the second cavity., 'an inner portion disposed within the first cavity, wherein the inner portion comprises2. The housing of claim 1 , wherein the inner portion is substantially shaped ...

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Номер записи: 70
11-02-2016 дата публикации

OPTICAL ACOUSTIC SUBSTRATE ASSESSMENT SYSTEM AND METHOD

Номер: US20160043008A1
Автор: KOTELYANSKII Michael, Mair Robin, MEHENDALE Manjusha, Mukundhan Priya, Murray Todd
Принадлежит:

A system and method for identifying one or more characteristics of a structure formed into a substrate is herein disclosed. Surface and bulk acoustic waves are induced in the substrate and travel past a structure of interest where the acoustic waves are sensed. Information concerning one or more characteristics of the structure is encoded in the wave. The encoded information is assessed to determine the characteristic of interest. 1. A method for nondestructively examining subsurface structures on semiconductor devices comprising:inducing at least an acoustic wave at a first location on an outer surface of a semiconductor device adjacent a structure that is at least partially embedded below the outer surface of the semiconductor device;detecting with a probe laser an effect of the induced acoustic wave at a second location on the outer surface of a semiconductor device, the structure being positioned at least partially between the first and second locations; and,measuring the time the acoustic wave takes to travel from the first location to the second location,repeating the inducing, detecting and measuring steps at a plurality of respective different first and different second positions relative to the structure to identify at least one characteristic of the structure.2. The method of claim 1 , wherein the detecting step includes using the probe laser to measure data representative of at least one of a physical distortion or index of refraction at the second location.3. The method of claim 1 , further comprising determining the frequency of the induced acoustic wave at the second location.4. The method of claim 1 , wherein the step of inducing at least an acoustic wave includes pulsing a pump laser for a first predetermined period of time.5. The method of claim 4 , wherein the first predetermined period of time is between one to one hundred nanoseconds.6. The method of claim 1 , wherein the characteristic of the structure that is identified is a position of the ...

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Номер записи: 71
24-02-2022 дата публикации

SYSTEMS AND METHODS FOR MODELING SUBSTANCE CHARACTERISTICS

Номер: US20220057368A1
Автор: Goodman Harvey Edwin, LEI Zhou, REMILLIEUX Marcel, Rougier Esteban, ULRICH Timothy James
Принадлежит:

Structure information for a substance within a volume may be obtained. The structure information may characterize structural non-linearity of the substance within the volume. A structure model for the substance within the volume may be generated based on the structure information and/or other information. The structure model may simulate one or more characteristics of the substance within the volume. Presentation of information on the characteristic(s) of the substance within the volume may be effectuated based on the structure model and/or other information. 1. A system for modeling substance characteristics , the system comprising:{'claim-text': ['obtain structure information for a substance within a volume, the structure information characterizing structural non-linearity of the substance within the volume;', 'generate a structure model for the substance within the volume based on the structure information, the structure model simulating a characteristic of the substance within the volume; and', 'effectuate presentation of information on the characteristic of the substance within the volume based on the structure model.'], '#text': 'one or more physical processors configured by machine-readable instructions to:'}2. The system of claim 1 , wherein the structure information is determined based on resonance frequencies of the substance within the volume.3. The system of claim 2 , wherein the determination of the structure information based on the resonance frequencies of the substance within the volume includes:receiving an acoustic wave that travels through the substance within the volume;determining the resonance frequencies of the substance within the volume based on the received acoustic wave;selecting a resonance frequency from the resonance frequencies;sending a resonance frequency acoustic wave through the substance within the volume multiple times, the resonance frequency acoustic wave having the selected resonance frequency and having different amplitudes ...

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Номер записи: 72
24-02-2022 дата публикации

SIGNAL PROCESSING TECHNIQUES FOR IMPROVING TARGET DETECTION AND/OR RESOLUTION

Номер: US20220057494A1
Автор: Krause Perin Jose, Moorti Rajendra Tushar, Rezk Mina, Viswanatha Kumar Bhargav
Принадлежит:

A system including an optical receiver to receive a return beam from the target. The optical receiver is to combine a second frequency modulate signal portion transmitted towards a local oscillator with a first frequency modulate portion to produce a beat frequency. The system further including a processor and a memory to store instructions executable by the processor. The processor to sample the beat frequency to produce a plurality of frequency subbands, and classify the plurality of frequency subbands into a plurality of subband types based on a subband criteria. The processor further to select one or more subband processing parameters based on the subband criteria, and process the plurality of frequency subbands, using the subband processing parameters, to determine a range and velocity of the target. 1. A light detection and ranging (LIDAR) system , comprising:an optical source to transmit a first portion of a light signal towards a target;an optical receiver to receive a return beam from the target based on the light signal, wherein the return beam comprises a first frequency modulated (FM) signal portion, the optical receiver is further to combine a second (FM) signal portion transmitted towards a local oscillator with the first (FM) portion to produce a beat frequency signal;circuitry; and{'claim-text': ['sample the beat frequency signal to produce a plurality of frequency subbands;', 'classify the plurality of frequency subbands into a plurality of subband types based on a subband criteria corresponding to different frequencies of different targets positioned relative to the LIDAR system;', 'select one or more subband processing parameters based on the subband criteria; and', 'process the plurality of frequency subbands, using the subband processing parameters, to determine information related to the target.'], '#text': 'a memory to store instructions that, when executed by the circuitry, cause the system to:'}2. The system of claim 1 , wherein the ...

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Номер записи: 73
07-02-2019 дата публикации

MODAL VIBRATION ANALYSIS SYSTEM

Номер: US20190041365A1
Автор: Zhao Weijie, Zhuge James Q.
Принадлежит: Crystal Instruments Corporation

A modal vibration analysis system and corresponding method is provided. A set of one or more exciters is coupled to a structure under test for generating vibrations in the structure. A set of sensors are coupled to the structure at multiple locations for sensing vibrations generated in the structure in response to the excitations. A controller receives sensor signals corresponding to the sensed vibrations from the set of sensors and provides drive signals to the set of exciters such that the sensor signals have a target output spectrum with specified characteristics in multiple designated frequency domains of the spectrum, characterized by a random phase for each frequency. Modal analysis processes digitized sensor signals with a Fast Fourier Transform conducted at two or more specified data sample rates to synthesize a spectrum containing data points with higher resolution for lower frequency range, and regular resolution for higher frequency range. From the multi-resolution spectra, natural frequencies and damping coefficients are determined at each mode, a mode shape at each natural frequency is computed using all measured data from all sensor locations. 1. A modal vibration analysis system , comprising:a set of one or more exciters coupled to a structure under test for generating vibrations in the structure;a set of sensors coupled to the structure at multiple locations for sensing vibrations generated in the structure in response to excitation;a controller receiving sensor signals corresponding to the sensed vibrations from the set of sensors and providing drive signals to the set of exciters such that the sensor signals have a target output spectrum with specified characteristics in multiple designated frequency domains of the spectrum, wherein the set of exciters simultaneously excite multiple coupled modes of vibration in the structure; anda modal analysis system receiving the excitation reference signal and sensor signals to compute a set of frequency ...

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Номер записи: 74
06-02-2020 дата публикации

ULTRASOUND IMAGE-BASED CONCENTRATION MEASUREMENT

Номер: US20200041400A1
Автор: Anthony Brian W., Boning Duane S., Lee John Haeseon
Принадлежит:

The systems and methods of the present disclosure are directed to ultrasound-based concentration measurement techniques in which both scatterer count and image volume are measured concurrently to provide absolute concentration measurements. In particular, through the techniques of the present disclosure, the effective thickness of an ultrasound beam can be determined based on the spreading of individual scatterers within ultrasound images. Based on the effective thickness of the ultrasound beam, the volume of the image and, thus, the concentration of particles in the image can be determined directly, without the need for estimation, approximation, or use of a reference sample. 1. A method comprising:acquiring an ultrasound image of a medium with an ultrasound transducer, wherein the ultrasound image includes at least a portion of a two-dimensional image obtained from the ultrasound transducer and wherein the medium contains a number of scatterers;determining an effective volume of the ultrasound image in which one or more of the number of scatterers in the medium produce an echo detectable within the two-dimensional image;counting the scatterers in the ultrasound image; andbased on the counted scatterers and the effective volume of the ultrasound image, determining an absolute concentration of the scatterers in the medium.2. The method of claim 1 , wherein determining the absolute concentration of the scatterers in the medium includes determining the absolute concentration of the scatterers without contacting the medium.3. The method of claim 1 , wherein determining the effective volume of the ultrasound image is based on echogenicity of the scatterers and attenuation of the medium.4. The method of claim 1 , wherein determining the effective volume of the ultrasound image is based on a ratio of an elevational beam profile to a lateral beam profile.5. The method of claim 1 , wherein determining the effective volume of the two-dimensional image includes determining an ...

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Номер записи: 75
06-02-2020 дата публикации

Capacitive transducer and ultrasonic probe using same

Номер: US20200041459A1
Автор: Ayako Maruyama
Принадлежит: Canon Inc

A capacitive transducer includes an element including a plurality of cells. Each of the cells includes a first electrode and a vibrating membrane including a second electrode opposed to the first electrode via a gap. The second electrode of one of the plurality of cells is electrically connected to the second electrode of at least one adjoining cell by first electrical wiring. The first electrical wiring over the gap of a first cell provided on a periphery of the element among the plurality of cells has a structure different from that of the first electrical wiring over the gap of a second cell provided on an inner side of the element than the first cell is.

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Номер записи: 76
06-02-2020 дата публикации

PHOTOACOUSTIC GAS SENSOR AND METHOD

Номер: US20200041460A1
Автор: Glacer Christoph, Tumpold David
Принадлежит:

A method for measuring the concentration of a gas includes heating a first gas with a pulse of light, the pulse of light having a wavelength absorbed by the first gas, wherein the first gas exerts pressure on a flexible membrane. The method includes receiving a first signal indicating a first deflection of the membrane, wherein the first deflection is due to a change in pressure of the first gas and receiving a second signal indicating a second deflection of the membrane occurring after the first signal, wherein the second deflection is due to the change in pressure of the first gas. The method includes determining a difference between the first signal and the second signal and, based on the difference between the first signal and the second signal, determining a first concentration of the first gas. 1. A photoacoustic gas sensor comprising:a chamber containing a gas;a pressure sensor disposed in the chamber, the pressure sensor comprising a flexible membrane and configured to output an output signal indicating a deflection of the flexible membrane;an emitter configured to illuminate the gas with light; and a sampling circuit configured to sample a first value of an output signal of the pressure sensor after a first duration of time and configured to sample a second value of the output signal of the pressure sensor after a second duration of time;', 'an analysis circuit configured to receive the first value and the second value and determine a correlation value from a difference between the first value and the second value; and', 'a correlation circuit configured to receive the correlation value and determine a concentration of the gas based on the correlation value and a predetermined correlation between correlation values and concentrations of the gas., 'a control circuit coupled to the pressure sensor and the emitter, wherein the control circuit comprises2. The photoacoustic gas sensor of claim 1 , wherein the analysis circuit comprises an analog circuit.3. The ...

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Номер записи: 77
06-02-2020 дата публикации

METHOD AND SYSTEM FOR MEASURING A WIDEBAND LOOP SENSITIVITY FOR AN ACOUSTIC TRANSDUCER

Номер: US20200041461A1
Автор: LAI Wen-Pin, YANG Fu-Chieh, YAO Jen-Chih, YUAN Ying-Wei
Принадлежит:

A method and system is disclosed for measuring a wideband loop sensitivity S(f) for an acoustic transducer in an acoustic probe. A pulse signal is employed as a wideband reference signal V(t); and, in a pulse-echo measurement a corresponding wideband echo signal V(t) is obtained. A normalized loop frequency response {circumflex over (X)}(f) for the acoustic transducer is defined as a ratio of a Fourier Transform of the V(t) to a Fourier Transform of the V(t). A wideband loop sensitivity S(f) for the acoustic transducer is defined as an absolute square of the {circumflex over (X)}(f) in decibel. 1. A system for measuring a wideband loop sensitivity for an acoustic transducer among a plurality of acoustic transducers in an acoustic probe , the system comprising:a pulse generator; anda control unit electrically coupled to the pulse generator,whereinthe pulse generator is configured to be selectively electrically coupled to a predetermined load for generating, by the pulse generator, a first pulse to create a wideband signal as a reference signal, and [{'sub': 'r', 'obtain a wideband reference signal V(t), and'}, {'sub': r', 'r, 'obtain a function {circumflex over (V)}(f) that is a Fourier Transform of the wideband reference signal V(t).'}], 'the control unit includes a memory storing therein a program or firmware for causing the control unit to'}2. The system as claimed in claim 1 , wherein the first pulse is one of a unipolar pulse and a bipolar pulse.3. The system as claimed in claim 2 , wherein the unipolar pulse is one of a negative-going pulse and a positive-going pulse.4. The system as claimed in claim 2 , wherein the bipolar pulse is a negative-going pulse first and a positive-going pulse second.5. The system as claimed in claim 2 , wherein the bipolar pulse is a positive-going pulse first and a negative-going pulse second.6. The system as claimed in claim 1 , wherein{'sub': 'r', 'the control unit is further configured to store the function {circumflex over (V ...

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Номер записи: 78
18-02-2016 дата публикации

III-V NITRIDE RESONATE STRUCTURE BASED PHOTOACOUSTIC SENSOR

Номер: US20160047781A1
Автор: Koley Goutam
Принадлежит:

A microcantilever based photoacoustic sensor is generally provided. In one embodiment, the microcantilever includes: a substrate; a GaN layer on the substrate, wherein the GaN layer defines a cantilever extending beyond an edge of the substrate, with a base area of the cantilever defined by the area spanning the edge of the substrate; a HFET deflection transducer positioned on the cantilever; a pair of electrical contacts, each electrically connected to the HFET deflection transducer; and a microfluidic channel in fluid communication with an analyte reservoir, wherein the analyte reservoir is positioned at the base of the cantilever. A sensing system is also generally provided. 1. A microcantilever based photoacoustic sensor , comprising:a substrate;a GaN layer on the substrate, wherein the GaN layer defines a cantilever extending beyond an edge of the substrate, with a base area of the cantilever defined by the area spanning the edge of the substrate;a HFET deflection transducer positioned on the cantilever;a pair of electrical contacts, each electrically connected to the HFET deflection transducer; anda microfluidic channel in fluid communication with an analyte reservoir, wherein the analyte reservoir is positioned at the base of the cantilever.2. The microcantilever based photoacoustic sensor of claim 1 , wherein the HFET deflection transducer comprises an AlGaN layer.3. The microcantilever based photoacoustic sensor of claim 1 , further comprising:a sapphire window positioned over the microfluidic channel such that the microfluidic channels are encapsulated.4. The microcantilever based photoacoustic sensor of claim 3 , wherein the microcantilever is encapsulated by the sapphire window within a vacuum.5. The microcantilever based photoacoustic sensor of claim 1 , wherein the microfluidic channels and the reservoir are defined by surfaces coated with parylene.6. The microcantilever based photoacoustic sensor of claim 5 , wherein the parylene has a thickness of ...

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Номер записи: 79
16-02-2017 дата публикации

VIBRATION SENSOR ASSEMBLY FOR PROGNOSTIC AND DIAGNOSTIC HEALTH ASSESSMENT OF A POWER CIRCUIT BREAKER'S POWER TRANSMISSION AND DISTRIBUTION SYSTEM IN REAL TIME

Номер: US20170045481A1
Автор: Ashtekar Koustubh Dnyandeo, Benke James Jeffery, CHEN Jiong, de Vries Wilbert, Wu Fangji, YANG He, Yu Li
Принадлежит: EATON CORPORATION

A component monitoring system structured to monitor circuit breaker assembly component characteristics is provided. The component monitoring system includes a record assembly, a number of vibration sensor assemblies, a comparison assembly, and an output assembly. The record assembly includes selected nominal data for a selected circuit breaker component. The vibration sensor assembly is structured to measure a number of actual component characteristics for a substantial portion of the circuit breaker assembly and to transmit actual component characteristic output data. The comparison assembly is structured to receive an electronic signal from said record assembly and said sensor assemblies, to compare each sensor assembly actual component characteristic output data to said selected nominal data and to provide an indication signal as to whether said sensor assembly output data is acceptable when compared to the selected nominal data. The output assembly includes a communication assembly and an output device. 1. A circuit breaker assembly component monitoring system structured to monitor circuit breaker assembly component characteristics , said system comprising:a record assembly including selected nominal data for a selected circuit breaker component;a number of vibration sensor assemblies structured to measure a number of actual component characteristics of a substantial portion of said circuit breaker assembly and to transmit actual component characteristic output data;a comparison assembly structured to receive an electronic signal from said record assembly and said vibration sensor assemblies, to compare said vibration sensor assembly actual component characteristic output data to said selected nominal data and to provide an indication signal as to whether said vibration sensor assembly output data is acceptable when compared to the selected nominal data;an output assembly including a communication assembly and an output device;said communication assembly ...

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Номер записи: 80
19-02-2015 дата публикации

OBJECT INFORMATION ACQUISITION APPARATUS, OBJECT INFORMATION ACQUISITION METHOD AND PROGRAM

Номер: US20150049581A1
Автор: Fukutani Kazuhiko
Принадлежит:

An object information acquisition apparatus includes: a plurality of acoustic wave detecting elements configured to detect an photoacoustic wave generated when an object is irradiated with light and output time-series detection signals; a member disposed outside the object; and a signal processing unit configured to acquire optical property information inside the object by performing image reconstruction through iterative reconstruction method in accordance with the time-series detection signals and an operand for which a response of the photoacoustic wave deriving from the member has been considered. 1. An object information acquisition apparatus , comprising:a plurality of acoustic wave detecting elements configured to detect an photoacoustic wave generated when an object is irradiated with light and output time-series detection signals;a member disposed outside the object; anda signal processing unit configured to acquire optical property information inside the object by performing image reconstruction through iterative reconstruction method in accordance with the time-series detection signals and an operand which represents reflection of the photoacoustic wave deriving from the member.2. The object information acquisition apparatus according to claim 1 , wherein the signal processing unit is configured to acquire the optical property information inside the object by performing image reconstruction through iterative reconstruction method in accordance with the time-series detection signals the operand which represents multiple reflection of the photoacoustic wave within the member.3. The object information acquisition apparatus according to claim 1 , wherein the member is disposed between the object and the plurality of acoustic wave detecting elements.4. The object information acquisition apparatus according to claim 1 , wherein the operand is an operand which is determined in accordance with the positions of the plurality of acoustic wave detecting elements ...

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Номер записи: 81
08-05-2014 дата публикации

Systems and Methods to Determine and Monitor Changes in Rail Conditions

Номер: US20140123761A1
Автор: Christopher Kube, Joseph A. Turner
Принадлежит: University of Nebraska

The embodiments disclosed herein relate to various systems and methods for determining the residual stress in polycrystalline materials.

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Номер записи: 82
14-02-2019 дата публикации

Photoacoustic probe

Номер: US20190046042A1
Автор: Toshinobu Tokita
Принадлежит: Canon Inc

A photoacoustic probe is used, which includes: a reception element configured to receive an acoustic wave generated in and propagated from an object which is irradiated with light; an elastic body configured to contact with the object when receiving the acoustic wave and to diffuse or transmit the light having a wavelength that generates the acoustic wave; an acoustic matching layer disposed between the elastic body and the reception element; and a reflection film disposed between the acoustic matching layer and the elastic body.

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Номер записи: 83
19-02-2015 дата публикации

Device and Method for Determining Particle Size Distribution On-line Using Acoustic Spectroscopy Through a Pipe

Номер: US20150051864A1
Автор: Dukhin Andrei S.
Принадлежит:

A device for determining particle size distribution on-line for concentrated dispersions or emulsions. The device includes an electronic block for generating electric pulses of specified frequencies on MHz scale and measuring magnitude and phase thereof. An acoustic sensor has an ultrasound transmitter to convert the electric pulses into ultrasound pulses of a same frequency and an ultrasound receiver to convert the ultrasound pulses back into electric pulses. The transmitter and the receiver each have a respective face. A stepping motor is connected to a movable piston, which carries one of the ultrasound transmitter or the ultrasound receiver thereon. A pipe with a flexible wall to conduct the dispersion or emulsion past the acoustic sensor. The pipe is disposed between the transmitter and the receiver, and the pipe has an exterior surface. The face of the transmitter and the face of the receiver are affixed to the exterior surface of the pipe. 2. The device according to claim 1 , wherein said exterior surface of said pipe is affixed to said face of said receiver and to said face of said transmitter so that said faces and said surface do not move relative to one another during compression of said pipe.3. A method for determining particle size distribution on-line for concentrated dispersions and emulsions claim 1 , the method comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'providing the device according to ;'}driving the stepping motor to a point where a distance between the transmitter and the receiver faces equals twice a thickness of the pipe wall for defining a closed system;subsequent to defining the closed system, transmitting pulses at the specified frequencies through the closed system for measuring a first energy loss of the transmitter, the receiver, and the pipe at each of the specified frequencies;moving a sample through the pipe and driving the stepping motor in specified multiple increments for opening the pipe to gap positions between ...

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Номер записи: 84
03-03-2022 дата публикации

ULTRASONIC METHOD AND SYSTEM FOR FLUID QUALITY MEASUREMENT, CLASSIFICATION, AND MONITORING

Номер: US20220065824A1
Автор: SILVERMAN Eugene B.
Принадлежит: BERKELEY SPRINGS INSTRUMENTS LLC

A system and method for determining fluid quality or change in quality by training machine learning algorithms using ultrasound Fast Fourier Transform (FFT) signatures. The system includes one or more ultrasonic transducers embedded inside or outside of a pipe, piping, or vessel that allows a fluid to flow past or between the ultrasound transducers. The transducer's acoustic energy creates ultrasound pressure waves and localized heat due to acoustic cavitation. The cavitation creates bubbles that collapse creating ultrasound sonic energy in the time domain. Unique sonic time-domain signatures, distinctively associated with the characteristics of the fluids, are converted to FFTs to produce unique, well-defined frequency response signatures. Machine learning algorithms are used to identify, measure, and classify the unique frequency response signatures associated with a wide range of fluids.

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Номер записи: 85
14-02-2019 дата публикации

FIBER OPTIC ACOUSTIC EMISSION SENSOR AND APPARATUS

Номер: US20190049412A1
Автор: Cranch Geoffrey A.
Принадлежит:

A method of monitoring a structure for stresses or cracks. A single mode optical fiber is adhered to a structure. The single mode optical fiber includes a first optical cavity. The first optical cavity includes two fiber Bragg gratings with a distance therebetween. The first optical cavity includes a resonance. A frequency shift of the resonance of the first optical cavity is measured with a frequency discriminator. An acoustic emission from the structure is detected based on the frequency shift. 1. A method comprising:adhering a single mode optical fiber to a structure, the single mode optical fiber comprising a first optical cavity, the first optical cavity comprising two fiber Bragg gratings with a distance therebetween, the first optical cavity comprising a resonance;measuring a frequency shift of the resonance of the first optical cavity with a frequency discriminator; anddetecting an acoustic emission from the structure based on the frequency shift.2. The method according to claim 1 , wherein the single mode optical fiber comprising an optical gain medium claim 1 , 'exciting the optical gain medium using an optical pump, thereby generating lasing in the optical cavity.', 'wherein the method further comprises3. The method according to claim 2 , wherein the optical gain medium comprises one of an erbium-doped optical gain medium and a neodymium-doped optical gain medium.4. The method according to claim 1 , wherein the optical pump comprises an optical wavelength claim 1 ,wherein the first optical cavity comprises an optical cavity width, the optical cavity width being about a multiple of half of the optical wavelength.5. The method according to claim 1 , wherein said adhering a single mode optical fiber to a structure comprises using one of a viscous liquid and an adhesive to impedance-match the single mode optical fiber to the structure.6. The method according to claim 5 , wherein the viscous liquid comprises one of gel and grease.7. The method according to ...

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Номер записи: 86
25-02-2016 дата публикации

METHOD AND SYSTEM FOR BURIED LAND MINE DETECTION THROUGH DERIVATIVE ANALYSIS OF LASER INTERFEROMETRY

Номер: US20160054270A1
Автор: LOUCHARD Eric M.
Принадлежит:

A method of detecting land mines includes pre-processing a raw laser interferometer image, processing pre-processed image by calculating one or more derivatives having one or more peaks, along vectors extending in at least two different directions, mapping the peaks of said derivatives to create a derivative map, and detecting an anomalous signature in the derivative map. 1. A method of locating objects buried under ground , comprising steps of:insonifying the ground with a system which can distinguish buried objects,forming a raw image of the ground with a laser interferometer,preprocessing the raw image with a computer to form a preprocessed image,processing the preprocessed image with a computer, wherein the processing step comprises calculating one or more derivatives having one or more peaks,mapping the one or more derivatives and the one or more peaks, to create a derivative map,detecting anomalous signatures in the derivative map, andhighlighting said preprocessed image at locations corresponding to said anomalous signatures.2. The method of claim 1 , wherein the step of pre-processing comprises filtering the raw laser interferometer image with a Gaussian blur filter.3. The method of claim 1 , wherein claim 1 , in the processing step claim 1 , derivatives are calculated along pixel vectors extending in two different directions claim 1 , and said derivatives are added to produce a magnitude map.4. The method of claim 3 , wherein said directions are row and column directions.5. The method of claim 3 , wherein only derivative values above a predetermined threshold are added to produce the magnitude map.6. The method of claim 3 , further comprising a step of masking to eliminate derivative values at points exceeding a predetermined maximum brightness on the preprocessed image.7. The method of claim 1 , wherein said objects are land mines.8. A system for detecting land mines claim 1 , said system comprisingan apparatus for insonifying a target area,a laser ...

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Номер записи: 87
25-02-2021 дата публикации

Scatterometer and Method of Scatterometry Using Acoustic Radiation

Номер: US20210055215A1
Автор: PANDEY Nitesh, PISARENCO Maxim, POLO Alessandro
Принадлежит: ASML Netherlands B.V.

An acoustic scatterometer has an acoustic source operable to project acoustic radiation onto a periodic structure and formed on a substrate. An acoustic detector is operable to detect the −1st acoustic diffraction order diffracted by the periodic structure and while discriminating from specular reflection (0th order). Another acoustic detector is operable to detect the +1st acoustic diffraction order diffracted by the periodic structure, again while discriminating from the specular reflection (0th order). The acoustic source and acoustic detector may be piezo transducers. The angle of incidence of the projected acoustic radiation and location of the detectors and are arranged with respect to the periodic structure and such that the detection of the −1st and +1st acoustic diffraction orders and discriminates from the 0th order specular reflection. 1. A scatterometer comprising:an acoustic source configured to project acoustic radiation at an angle of incidence onto a target formed on a substrate to produce first and second acoustic diffraction orders;a first acoustic detector configured to detect the first acoustic diffraction order while discriminating from spectral reflection and to produce a first detection signal; anda second acoustic detector configured to detect the second acoustic diffraction order while discriminating from spectral reflection and to produce a second detection signal,wherein the scatterometer is configured to determine a property of the substrate based on the first and second detection signals, and a first periodic structure;', 'a second periodic structure overlaying the first periodic structure; and', 'a layer disposed between the first and second periodic structures., 'wherein the target comprises2. The scatterometer of claim 1 , wherein the layer transmits acoustic radiation but is opaque to optical radiation.3. The scatterometer of claim 1 , wherein the angle of incidence of the projected acoustic radiation and location of the first and ...

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Номер записи: 88
10-03-2022 дата публикации

BONDING LAYER EVALUATION SYSTEM AND BONDING LAYER EVALUATION METHOD

Номер: US20220074895A1
Автор: KAMO Sota, MATSUDA Naoki, MORI Naoki, TAKAGI Kiyoka
Принадлежит:

A bonding layer evaluation system includes an elastic wave generation device configured to generate an elastic wave from a sample including a bonding layer; an elastic wave reflection body configured to reflect the elastic wave generated from the sample; a sample installation unit provided between the elastic wave generation device and the elastic wave reflection body; an elastic wave detection device disposed in a direction in which the elastic wave is reflected by the elastic wave reflection body, and configured to detect the reflected elastic wave; and a control device configured to evaluate a parameter related to the bonding layer. The control device evaluates the parameter related to the bonding layer by comparing the actual value of the elastic wave detected by the elastic wave detection device with a theoretical value of the elastic wave calculated based on a theoretical model related to the sample. 1. A bonding layer evaluation system comprising:an elastic wave generation device configured to generate an elastic wave from a sample including a bonding layer;an elastic wave reflection body configured to reflect the elastic wave generated from the sample;a sample installation unit provided between the elastic wave generation device and the elastic wave reflection body;an elastic wave detection device disposed in a direction in which the elastic wave is reflected by the elastic wave reflection body, the elastic wave detection device being configured to detect the reflected elastic wave; anda control device configured to evaluate a parameter related to the bonding layer of the sample, wherein an elastic wave generation control unit configured to cause the elastic wave generation device to generate the elastic wave from the sample,', 'an elastic wave detection control unit configured to cause the elastic wave detection device to detect an actual value of the reflected elastic wave, and', 'a detection wave evaluation unit configured to evaluate the parameter ...

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Номер записи: 89
21-02-2019 дата публикации

Method and Apparatus for Spectroscopy

Номер: US20190056359A1
Автор: BITAULD David
Принадлежит:

A method including: generating a first comb optical signal; generating a second comb optical signal; exciting a sample using in combination the first comb optical signal and the second comb optical signal; and detecting at the sample an acoustic response of the sample. 1. A method comprising:generating a first comb optical signal;generating a second comb optical signal;exciting a sample using in combination the first comb optical signal and the second comb optical signal; anddetecting at the sample an acoustic response of the sample.2. A method as claimed in claim 1 , wherein the sample is optically excited along an axis claim 1 , andthe acoustic response of the sample is detected off-axis.3. A method as claimed in claim 1 , comprising using one or more pressure transducers to detect pressure variations caused by the acoustic response of the sample.4. A method as claimed in claim 1 , comprising using multiple pressure transducers to detect pressure variations caused by the acoustic response of the sample claim 1 , wherein each of the multiple pressure transducers is optimized for a different range of acoustic frequencies.5. A method as claimed in claim 4 , wherein in combination the first comb optical signal and the second comb optical signal enter a holder for the sample along an axis via an on-axis window claim 4 , wherein multiple pressure transducers are configured within the holder off-axis.6. A method as claimed in claim 1 , performing spectral analysis of the detected acoustic response of the sample using a spectrum analyzer configured to measure a range of lower frequency heterodyne beats produced by the combination of the first comb optical signal and the second comb optical signal.7. A method as claimed in claim 1 , wherein when an optical mode of the first comb optical signal and a paired optical mode of the second comb optical signal both fall with an absorption spectrum of the sample claim 1 , a heterodyne beating of those modes excites the sample to ...

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Номер записи: 90
01-03-2018 дата публикации

Optical fiber sensor device and vibration position specifying method

Номер: US20180058886A1
Автор: Yoshihiro Kanda
Принадлежит: Oki Electric Industry Co Ltd

The optical fiber sensor device comprises a probe light supply unit, an optical fiber sensor unit, and a polarization state measuring unit. The probe light supply unit generates and outputs a polarization switched light beam by alternately switching a polarized CW light beam in polarization directions orthogonal to each other with elapse of time. The optical fiber sensor unit includes a loop-state optical fiber into which the polarization switched light beam is input and which outputs a light wave reflecting a change of birefringence according to a stress applied from an outside in the polarization switched light beam. The polarization state measuring unit observes polarization states of the respective light waves propagating clockwise and counterclockwise through the optical fiber. The polarization state measuring unit calculates an angular velocity vector ω b defined by an equation that specifies a relationship between a temporal change rate ds out (t)/dt of a Stokes vector s out (t) giving a polarization state of the light wave from the optical fiber and the Stokes vector s out (t) for each of the clockwise and counterclockwise light waves. The angular velocity vector ω b gives a direction of a rotation center axis and a rotation angular velocity of the Stokes vector s out (t).

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Номер записи: 91
01-03-2018 дата публикации

GAS ANALYZER

Номер: US20180059066A1
Автор: Dehe Alfons, Glacer Christoph, Tumpold David
Принадлежит:

A gas analyzer is provided. The gas analyzer may include: a tubular housing having a housing wall extending along an axial direction of the tubular housing and surrounding a gas chamber configured to receive a gas to be analyzed therein, an excitation element positioned at a first axial end of the tubular housing and configured to selectively excite gas molecules of a specific type that is to be detected in the gas received in the gas chamber in a time-varying fashion, thereby generating acoustic waves, and a sensor positioned at a second axial end of the tubular housing and configured to detect acoustic waves generated by the excitation element. 1. A gas analyzer , comprising:a tubular housing having a housing wall extending along an axial direction of the tubular housing and surrounding a gas chamber configured to receive a gas to be analyzed therein;an excitation element positioned at a first axial end of the tubular housing and configured to selectively excite gas molecules of a specific type that is to be detected in the gas received in the gas chamber in a time-varying fashion, thereby generating acoustic waves; anda sensor positioned at a second axial end of the tubular housing and configured to detect acoustic waves generated by the excitation element.2. The gas analyzer of claim 1 ,wherein the excitation element comprises or is configured as a radiation source configured to emit radiation, wherein the radiation is adapted to selectively excite in a time-varying fashion the type of gas molecules that is to be detected.3. The gas analyzer of claim 2 ,wherein the radiation source is configured to emit electromagnetic radiation.4. The gas analyzer of claim 3 ,wherein the radiation source is configured to emit electromagnetic radiation in the infrared and/or in the visible and/or in the ultraviolet frequency range.5. The gas analyzer of claim 4 ,wherein the radiation source comprises at least one of a group comprising: a black-body radiator, a photodiode, and a ...

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Номер записи: 92
02-03-2017 дата публикации

ACOUSTIC WAVE PROBE, ACOUSTIC WAVE TRANSDUCER UNIT, AND OBJECT INFORMATION ACQUISITION APPARATUS

Номер: US20170059530A1
Автор: Kandori Atsushi
Принадлежит:

An acoustic wave probe includes a support member including a plurality of through holes and a concave portion which is concave facing an object disposed in a measurement position at the time of measurement, and an acoustic wave transducer unit including at least a transducer. The acoustic wave transducer unit is mounted in the through hole facing approximately a center of curvature of the concave portion, and a thickness of the acoustic wave transducer unit is thinner on a side of the center of curvature. 1. An acoustic wave probe comprising:a support member including a plurality of through holes and a concave portion, the concave portion being concave facing an object disposed in a measurement position at the time of measurement; andan acoustic wave transducer unit including at least a transducer,wherein the acoustic wave transducer unit is mounted in the through hole approximately facing a center of curvature of the concave portion, andwherein a thickness of the acoustic wave transducer unit is thinner on a side of the center of curvature.2. The acoustic wave probe according to claim 1 , wherein in the acoustic wave transducer unit claim 1 , an area of a cross section of an end portion on a side of the center of curvature is smaller than an area of a cross section of another end portion on a side opposite to the side of the center of curvature claim 1 , and an area of cross section of a portion between the end portion and the another end portion is equal to or smaller than the area of the cross section of the another end portion.3. The acoustic wave probe according to claim 1 , wherein the concave portion of the support member is approximately spherical.4. The acoustic wave probe according to claim 1 , wherein an alignment mechanism is provided between the support member and the acoustic wave transducer unit.5. The acoustic wave probe according to claim 4 , wherein the alignment mechanism is a fitting mechanism comprising a set of a portion in an outward shape of ...

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Номер записи: 93
28-02-2019 дата публикации

ULTRASONIC PROBE AND PHOTOACOUSTIC APPARATUS INCLUDING THE ULTRASONIC PROBE

Номер: US20190059738A1
Автор: Abe Naoto, SUZUKI Koichi
Принадлежит:

An ultrasonic probe includes a light irradiation unit configured to irradiate a subject with light, an acoustic wave receiving unit configured to receive an acoustic wave generated when the subject is irradiated with the light and convert the acoustic wave into an electric signal, an analog-to-digital conversion unit configured to convert the electric signal into a digital signal, an integration unit configured to integrate a plurality of the digital signals obtained when the subject is irradiated with the light multiple times and output an integrated signal, and a communication unit configured to perform a communication of the integrated signal. 1. An ultrasonic probe comprising:a light irradiation unit configured to irradiate a subject with light;an acoustic wave receiving unit configured to receive an acoustic wave generated when the subject is irradiated with the light and convert the acoustic wave into an electric signal;an analog-to-digital conversion unit configured to convert the electric signal into a digital signal;an integration unit configured to integrate a plurality of the digital signals obtained when the subject is irradiated with the light multiple times and output an integrated signal; anda communication unit configured to perform a communication of the integrated signal.2. The ultrasonic probe according to claim 1 , wherein the communication unit is configured to perform a wireless communication of the integrated signal.3. The ultrasonic probe according to claim 1 , wherein the integration unit is configured to be able to perform division processing for dividing the integrated signal.4. The ultrasonic probe according to claim 1 , wherein the integration unit is configured to be able to change the number of times to perform the integration of the digital signals.5. The ultrasonic probe according to claim 1 , wherein the acoustic wave receiving unit is configured to be able to perform ultrasonic wave transmission.6. The ultrasonic probe according to ...

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Номер записи: 94
28-02-2019 дата публикации

SURFACE PROPERTY MEASUREMENT METHOD, SURFACE PROPERTY MEASUREMENT APPARATUS, AND RECORDING MEDIUM

Номер: US20190059857A1
Автор: HARA Yusuke, HOZUMI Naohiro, Kobayashi Kazuto, OGURA Yuki, YOSHIDA Sachiko
Принадлежит:

A surface property measurement technology by which a surface property of a substance can be evaluated with high accuracy, is provided. 1. A surface property measurement method comprising:radiating an ultrasonic wave to a measurement target and acquiring a reflected signal from the measurement target;calculating, by a measurement apparatus, a maximum value of a cross-correlation function between the reflected signal from the measurement target and a reference reflected signal from a reference substance acquired in advance;calculating a reflection component at an interface, by using the maximum value of the cross-correlation function; andoutputting, as a measurement value, one of an acoustic impedance of the measurement target or an acoustic impedance of the reference substance, according to a result of comparing the reflection component with the reference reflected signal.2. The surface property measurement method according to claim 1 , further comprising:calculating and outputting the acoustic impedance of the measurement target, upon determining that an intensity of the reflection component is lower than an intensity of the reference reflected signal.3. The surface property measurement method according to claim 1 , further comprising:outputting the acoustic impedance of the reference substance, upon determining that an intensity of the reflection component is not lower than an intensity of the reference reflected signal.4. The surface property measurement method according to claim 1 , wherein the calculating of the reflection component includes multiplying the reference reflected signal by a ratio of the reflected signal from the measurement target to the reference reflected signal and by the maximum value of the cross-correlation function.5. The surface property measurement method according to claim 1 , further comprising:one-dimensionally or two-dimensionally and relatively scanning the ultrasonic wave to the measurement target; andoutputting the measurement ...

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Номер записи: 95
17-03-2022 дата публикации

Method for ultrasound imaging using two-dimensional fourier transform, corresponding computer program and ultrasound probe device

Номер: US20220082526A1
Автор: Claire Prada Julia, Lucas MERABET, Sebastien Robert
Принадлежит: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS, Commissariat a lEnergie Atomique et aux Energies Alternatives CEA

This two-dimensional Fourier transform ultrasound imaging method includes by controlling transmitting and receiving transducers: obtaining M matrices MRm, 1≤m≤M, of sampled ultrasonic time signals; two-dimensional Fourier transforming each matrix MRm to obtain M spectral matrices FTMRm; converting each spectral matrix FTMRm to obtain M spectral images FTIm; combining the M spectral images FTIm and two-dimensional inverse Fourier transforming the resulting spectral image FTI to obtain an ultrasound image I. The conversion includes taking into account a change of propagation mode during a backscatter, by adding a parameter characterizing this change of mode in equations (SYS) of change of reference frame, and/or taking into account a reflection against a wall, by adding a phase shift term in a relation (REL) of matrix transformation.

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Номер записи: 96
10-03-2016 дата публикации

SYSTEM AND METHOD FOR PIPE AND CEMENT INSPECTION USING BOREHOLE ELECTRO-ACOUSTIC RADAR

Номер: US20160069842A1
Автор: Bonavides Clovis, Donderici Burkay
Принадлежит:

An example method for pipe inspection in a subterranean formation using borehole electro-acoustic radar may include emitting mechanical energy from a mechanical energy source disposed in a pipe, which may cause the pipe to vibrate. Electromagnetic (EM) energy from an electromagnetic energy source disposed in the borehole may then be transmitted and received. A vibration signature of the medium may be identified by comparing the transmitted EM energy to the received EM energy. This may include determining the phase difference between the transmitted and received EM energy, which can be correlated to the vibration of the pipe. 1. A method for pipe inspection in a subterranean formation , comprising:emitting mechanical energy from a mechanical energy source disposed in a borehole, wherein the mechanical energy causes a medium within the borehole to vibrate according to a first vibration signature; andtransmitting first electromagnetic (EM) energy from an EM energy source disposed in the borehole;receiving the first EM energy; andidentifying the first vibration signature of the medium by comparing the transmitted first EM energy to the received first EM energy.2. The method of claim 1 , wherein the EM energy source comprises an array of antennae.3. The method of claim 1 , wherein the EM energy source comprises electric or magnetic dipoles.4. The method of claim 3 , wherein the electric or magnetic dipoles comprise at last one of a Horn antenna claim 3 , a phase array claim 3 , and a parabolic antenna.5. The method of claim 1 , wherein the EM energy source comprises a microwave source claim 1 , and the transmitted first EM energy comprises microwave energy pulses.6. The method of claim 1 , wherein the EM energy source comprises an optical source claim 1 , and the transmitted first EM energy comprises laser pulses.7. The method of claim 1 , wherein identifying the first vibration signature of the medium by comparing the transmitted first EM energy to the received first EM ...

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Номер записи: 97
09-03-2017 дата публикации

TRANSDUCER UNIT, ACOUSTIC PROBE INCLUDING THE TRANSDUCER UNIT, AND PHOTOACOUSTIC APPARATUS INCLUDING THE ACOUSTIC PROBE

Номер: US20170067856A1
Автор: Kandori Atsushi
Принадлежит:

A transducer unit includes a substrate, a capacitive transducer provided on the substrate and configured to receive an acoustic wave generated when a subject is irradiated with light from a light source and output an electric signal, a circuit substrate including a current/voltage conversion circuit configured to convert a current output from the capacitive transducer into a voltage, and a flexible printed wiring that electrically connects the capacitive transducer to the current/voltage conversion circuit, in which the circuit substrate is provided on a surface side opposite to a surface where the capacitive transducer is provided among surfaces of the substrate. 1. A transducer unit comprising:a chip;a capacitive transducer provided on the chip and configured to receive an acoustic wave generated when a subject is irradiated with light from a light source and output an electric signal;a circuit substrate including a current/voltage conversion circuit configured to convert a current output from the capacitive transducer into a voltage; anda flexible printed wiring that electrically connects the capacitive transducer to the current/voltage conversion circuit,wherein the circuit substrate is provided on a surface side opposite to a surface where the capacitive transducer is provided among surfaces of the chip.2. The transducer unit according to claim 1 , wherein the chip includes a through wiring claim 1 , and the through wiring connected to an electrode of the capacitive transducer is drawn out to the surface opposite to the surface where the capacitive transducer is arranged among the surfaces of the chip.3. The transducer unit according to claim 2 , further comprising:a rigid flexible printed circuit board in which the flexible printed wiring and a rigid substrate are integrated to each other,wherein the surface opposite to the surface where the capacitive transducer is arranged among the surfaces of the chip is arranged at a position facing an electrode provided ...

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Номер записи: 98
09-03-2017 дата публикации

Apparatus and Method for In-Situ Calibration of a Photoacoustic Sensor

Номер: US20170067859A1
Автор: Dehe Alfons, Huber Jochen, Jost Franz, Kolb Stefan, Theuss Horst, Woellenstein Juergen
Принадлежит: INFINEON TECHNOLOGIES AG

An apparatus for in-situ calibration of a photoacoustic sensor is provided. The apparatus includes a light emitter to emit light along a transmission path to a gas and an acoustic sensor element configured to detect an acoustic signal emitted from the gas based on the received light. Furthermore, the apparatus includes a sensing unit configured to detect the light transmitted along the transmission path and to provide an output signal, and a calibration unit to receive the output signal from the sensing unit and to provide a calibration information based on the output signal received from the sensing unit. 1. An apparatus for in-situ calibration of a photoacoustic sensor , the apparatus comprising:a light emitter to emit light along a transmission path to a gas;an acoustic sensor element configured to detect an acoustic signal emitted from the gas based on received light;a sensing unit configured to detect the light transmitted along the transmission path and to provide an output signal; anda calibration unit to receive the output signal from the sensing unit and to provide a calibration information based on the output signal from the sensing unit.2. The apparatus according to claim 1 , wherein the sensing unit is located at a first distance to an acoustic sensor of the photoacoustic sensor and at a second distance to the light emitter of the photoacoustic sensor claim 1 , wherein the first distance is smaller than the second distance.3. The apparatus according to claim 1 , wherein the sensing unit is located at a spatial position such that the light detected from the sensing unit and the light reaching the gas are both attenuated by a same amount.4. The apparatus according to any of claim 1 , wherein the sensing unit is located at a spatial position with respect to an acoustic sensor of the photoacoustic sensor such that a length of an effective transmission path of a physical characteristic to the sensor and to the sensing unit differs by not more than 20%.5. The ...

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Номер записи: 99
09-03-2017 дата публикации

Control Area Network Machine Diagostic

Номер: US20170067860A1
Автор: Grabill Paul, Varak Denis
Принадлежит:

A method of monitoring and balancing rotary machinery utilizing bus-based smart vibration sensors with dedicated tachometer signals fed, via a wire or wirelessly, to each bus-based smart vibration sensor. 1. A method for machinery monitoring and balancing comprising the steps of i) developing a composite tachometer signal , ii) attaching a plurality of bus-based smart vibration sensors to said machinery , and iii) feeding a dedicated tachometer signal to at least one of said bus-based smart vibration sensor.2. The method of machinery monitoring and balancing of wherein said dedicated tachometer signal is transmitted to at least one of said bus-based smart vibration signal by a wire.3. The method of machinery monitoring and balancing of wherein said dedicated tachometer signal is transmitted to at least one of said bus-based smart vibration signal by a wireless connection.4. The method for machinery monitoring of and balancing wherein said composite tachometer signal sums resultant shaft speeds from many associated shafts claim 1 , said composite signal being simultaneously broadcast to at least one of of said bus-based smart vibration sensors.5. The method for machinery monitoring and balancing of further comprising the step of providing setup information in the memory of the tachometer bus signal processing device.6. The method for machinery monitoring and balancing of further comprising the step of creating the composite tachometer signal using a summing of tachometer signals.7. The method for machinery monitoring and balancing of further comprising the step of creating the composite tachometer signal using amplitude modulation.8. The method for machinery monitoring and balancing of creating the composite tachometer signal using frequency modulation.9. The method for machinery monitoring and balancing of creating the composite tachometer signal using a digital summing.10. The method for machinery monitoring and balancing of wherein said method step of feeding a ...

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Номер записи: 100