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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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Форма поиска

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 15414. Отображено 100.
24-05-2012 дата публикации

Downhole instrument calibration during formation survey

Номер: US20120125077A1
Автор: Adan Hernandez Herrera, Christopher Allen Golla, James H. Dudley, Joe Marzouk, Paul F. Rodney
Принадлежит: Halliburton Energy Services Inc

A downhole sensor calibration apparatus includes a rotational or gimbaling mechanism for guiding a sensing axis of an orientation responsive sensor through a three-dimensional orbit about three orthogonal axes. A method includes using measurements taken over the three-dimensional orbit to calibrate the sensor and determine other characteristics of the sensor or tool.

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Номер записи: 1
05-07-2012 дата публикации

Inertial sensor aided heading and positioning for gnss vehicle navigation

Номер: US20120173190A1
Автор: Ashutosh Joshi, Disha Ahuja, Joseph Czompo, Shanta Pavan NAMBURI
Принадлежит: Qualcomm Inc

An apparatus and method for providing an improved heading estimate of a mobile device in a vehicle is presented. First, the mobile device determines if it is mounted in a cradle attached to the vehicle; if so, inertia sensor data may be valid. While in a mounted stated, the mobile device determines whether it has been rotated in the cradle; if so, inertia sensor data may no longer be reliable and a recalibration to determine a new relative orientation between the vehicle and the mobile device is needed. If the mobile device is mounted and not recently rotated, heading data from multiple sensors (e.g., GPS, gyroscope, accelerometer) may be computed and combined to form the improved heading estimate. This improved heading estimate may be used to form an improved velocity estimate. The improved heading estimate may also be used to compute a bias to correct a gyroscope.

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Номер записи: 2
19-07-2012 дата публикации

Temperature detection circuit and sensor device

Номер: US20120183016A1
Автор: Masahiro Kanai
Принадлежит: Seiko Epson Corp

A temperature detection circuit capable of generating a temperature detection voltage with reduced noise level, and a sensor device using the same are provided. The temperature detection circuit includes a temperature detection voltage generator that generates a first temperature detection voltage of which the voltage level based on a reference voltage varies according to the temperature; a temperature detection voltage inverter that inverts the first temperature detection voltage on the basis of the reference voltage, and amplifies or attenuates the first temperature detection voltage to generate a second temperature detection voltage; and a temperature detection voltage adder that adds up the first temperature detection voltage and the second temperature detection voltage.

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Номер записи: 3
09-08-2012 дата публикации

System and Method for Calibrating an Accelerometer

Номер: US20120203486A1
Автор: Christopher Harris Snow, Nazih Almalki
Принадлежит: Research in Motion Ltd

A method and system are provided for obtaining data for calibrating an accelerometer. The method and system operate by using at least one magnetometer reading to detect that a first orientation is being maintained; obtaining a plurality of accelerometer readings at the first orientation; using at least one magnetometer reading to detect that a plurality of additional orientations are being maintained and, for each orientation, obtaining a plurality of accelerometer readings at that orientation; determining calibration parameters comprising, for each axis of the accelerometer, at least one of a gain value and an offset value, using the plurality of accelerometer readings at the first and plurality of additional orientations; and applying the calibration parameters to subsequent accelerometer readings.

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Номер записи: 4
04-10-2012 дата публикации

Test auxiliary device

Номер: US20120247176A1
Автор: Bing-Cheng Ou, Ching-Feng Hsieh, Tzu-Haomr Sheng
Принадлежит: Askey Computer Corp

A test auxiliary device for testing a portable data terminal having a plurality of sensors includes a base, a carrying unit, a driving unit, and a controlling unit. The carrying unit is disposed on the base and includes a carrying platform and a carrying base. The carrying platform and the carrying base form a first angle and a second angle with the base, respectively, and thereby together form a compound slope. The driving unit drives the carrying unit to move, allowing the carrying platform to move with acceleration and at an angular velocity. The controlling unit receives sensing values generated by the sensors, respectively. The test auxiliary device further includes a test matching unit for testing the sensors in operation. Accordingly, the test auxiliary device assists users in determining whether the sensors of the portable data terminal are functioning well.

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Номер записи: 5
27-12-2012 дата публикации

Method for a measuring instrument

Номер: US20120326709A1
Автор: Magnus Westermark, Mikael Hertzman
Принадлежит: TRIMBLE AB

A method for a measuring instrument is disclosed, for separating the angular deviation of a rotational axis of an instrument body from a corresponding true rotational axis due to imperfections in at least one rolling-element bearing effectuating the rotational mounting of the instrument body into different parts corresponding to type of imperfection. The method comprises detecting rotary position of the at least one rolling-element bearing, and determining angular deviation of the rotational axis from the corresponding true rotational axis in a plurality of rotational positions of the instrument body, wherein the instrument body is rotated a plurality of successive full or partial revolutions about the rotational axis. There is also disclosed a measuring system and a measuring instrument to be used in such a measuring system.

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Номер записи: 6
27-12-2012 дата публикации

Method for calibrating inertial sensor installed in arbitrary position on board vehicle and sensor system of dynamics of vehicle able to be installed on board in arbitrary position

Номер: US20120330497A1
Автор: Claudio De Tommasi
Принадлежит: Magneti Marelli SpA

A method calibrates an inertial-sensor device installed in an arbitrary position on board a vehicle and adapted to detect at least one entity indicative of vehicle dynamics along at least one direction of a local reference-coordinate system. The method includes steps of: acquiring by the inertial-sensor device at predetermined measuring times real-measured data indicative of the vehicle dynamics in the local reference-coordinate system; acquiring by a calibrating detector different from the inertial-sensor device, at sampling times coinciding with the measuring times, reference-measured data indicative of the vehicle dynamics in a vehicle-coordinate system; and generating a coordinate-transformation matrix adapted to correlate the entity measured in the local reference-coordinate system with a corresponding entity in the vehicle-coordinate system. Also, a sensor system of dynamics of the vehicle is able to be installed on board in an arbitrary position.

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Номер записи: 7
14-02-2013 дата публикации

Inertial sensor and method of manufacturing the same

Номер: US20130036818A1
Автор: Heung Woo Park, Jong Woon Kim, Min Kyu Choi, Sung Jun Lee, Won Kyu Jeung
Принадлежит: Samsung Electro Mechanics Co Ltd

Disclosed herein are an inertial sensor and a method of manufacturing the same. The inertial sensor 100 according to a preferred embodiment of the present invention is configured to include a plate-shaped membrane 110, a mass body 120 disposed under a central portion 113 of the membrane 110, a post 130 disposed under an edge 115 of the membrane 110 so as to support the membrane 110, and a bottom cap 150 of which the edge 153 is provided with the first cavity 155 into which an adhesive 140 is introduced, wherein the adhesive 140 bonds an edge 153 to a bottom surface of the post, whereby the edge 153 of the bottom cap 150 is provided with the first cavity 155 to introduce the adhesive 140 into the first cavity 155, thereby preventing the adhesive 140 from being permeated into the post 130.

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Номер записи: 8
16-05-2013 дата публикации

SENSOR AUTO-CALIBRATION

Номер: US20130121367A1
Автор: AHUJA Disha, DESAI Ashish Nagesh, Kulik Victor, Puig Carlos M.
Принадлежит: QUALCOMM INCORPORATED

Aspects of the disclosure relate to computing technologies. In particular, aspects of the disclosure relate to mobile computing device technologies, such as systems, methods, apparatuses, and computer-readable media for improving calibration data by increasing the diversity of orientations used for generating the calibration data. In one embodiment, the computing device receives a plurality of calibration measurements associated with one or more sensors of a device, determines a degree to which the plurality of calibration measurements were captured at different orientations of the device, and determines, based on the degree, whether to update one or more calibration parameters. 1. A method comprising:receiving a plurality of calibration measurements associated with one or more sensors of a device;determining a degree to which the plurality of calibration measurements were obtained at different orientations of the device; anddetermining, based on the degree, whether to update one or more calibration parameters.2. The method of claim 1 , wherein:determining the degree to which the plurality of calibration measurements were obtained at different orientations comprises calculating an orientation entropy for the plurality of calibration measurements.3. The method of claim 2 , further comprising:in response to determining that the orientation entropy exceeds a predetermined threshold, updating the one or more calibration parameters.4. The method of claim 2 , further comprising:in response to determining that the orientation entropy is below a predetermined threshold, discarding a calibration measurement for an orientation for which a calibration measurement has been previously received without updating the one or more calibration parameters.5. The method of claim 2 , further comprising:in response to determining that the orientation entropy is below a predetermined threshold, using a calibration measurement for an orientation for which a calibration measurement has been ...

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Номер записи: 9
16-05-2013 дата публикации

SENSOR AUTO-CALIBRATION

Номер: US20130124127A1
Автор: AHUJA Disha, DESAI Ashish Nagesh, Kulik Victor, Puig Carlos M.
Принадлежит: QUALCOMM Incorporation

Aspects of the disclosure relate to computing technologies. In particular, aspects of the disclosure relate to mobile computing device technologies, such as systems, methods, apparatuses, and computer-readable media to improve the calibration data by taking into account the effects of change in temperature on motion sensors. For instance, different levels of error may be associated with a motion sensor at different temperature levels. In one implementation, the sensor measurement data associated with the various orientations at a temperature is used in determining the calibration data for that temperature. 1. A method for generating calibration data , the method comprising:detecting temperature of an operating environment for a sensor coupled to a device;determining that diversity associated with sensor measurement data at or near the temperature is below a threshold; andin response to determining that the diversity associated with the sensor measurement data at or near the temperature is below the threshold, generating the calibration data for the sensor for the detected temperature using sensor measurement data from another temperature.2. The method of claim 1 , wherein the sensor is one or more of an accelerometer claim 1 , a gyroscope or a magnetometer.3. The method of claim 1 , further comprising identifying a temperature bin from a plurality of temperature bins for the sensor using the detected temperature claim 1 , in response to detecting temperature of an operating environment for the sensor claim 1 , wherein the temperature bin comprises a range of temperatures.4. The method of claim 3 , wherein the temperature bin has one or more sensor measurements received at a temperature within the range of temperatures associated with the temperature bin.5. The method of claim 4 , wherein the generating comprises using sensor measurement data from another temperature bin.6. The method of claim 5 , further comprising lowering a weight associated with the sensor ...

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Номер записи: 10
30-05-2013 дата публикации

GYRO SENSOR OFFSET AUTOMATIC CORRECTING CIRCUIT, GYRO SENSOR SYSTEM AND METHOD FOR AUTOMATICALLY CORRECTING OFFSET OF GYRO SENSOR

Номер: US20130133397A1
Автор: Kim Chang Hyun, KIM Sung Tae
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

Disclosed herein are a gyro sensor offset automatic correcting circuit, a gyro sensor system, and a method for automatically correcting offset of a gyro sensor. There is provided a gyro sensor offset automatic correcting circuit, including: a signal gain controller receiving and amplifying output signals of each sensor electrode, while removing at least some of offset by a driving signal component included in each output signal by controlling a variable resistor(s); and an amplitude detector detecting the output signal of the signal gain controller to control the variable resistor(s) so that the output signal of the signal gain controller is maintained within a predetermined range. Further, there are provided a gyro sensor system including the gyro sensor offset automatic correcting circuit and a method for automatically correcting offset of a gyro sensor. 1. A gyro sensor offset automatic correcting circuit , comprising:a signal gain controller receiving and amplifying output signals of each sensor electrode, while removing at least some of offset by a driving signal component included in each output signal by controlling a variable resistor(s); andan amplitude detector detecting the output signal of the signal gain controller to control the variable resistor(s) so that the output signal of the signal gain controller is maintained within a predetermined range.2. The gyro sensor offset automatic correcting circuit according to claim 1 , wherein the signal gain controller includes:a gain adjusting unit receiving the output signals of each sensor electrode and amplifying the received output signal to have a gain adjusted by controlling the variable resistor(s); anda differential amplifying unit receiving the output of the gain adjusting unit and differentially amplifying the received output to remove at least some of the offset by the driving signal component.3. The gyro sensor offset automatic correcting circuit according to claim 2 , wherein the gain adjusting unit ...

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Номер записи: 11
06-06-2013 дата публикации

Field interchangable boresight mounting system and calibration method

Номер: US20130139566A1
Автор: David Robert Storch, Douglas Mark Weed, Ralph R. Jones
Принадлежит: Honeywell International Inc

A calibration method comprises providing a mounting fixture including a tray coupled to a frame, and an alignment measurement sensor removably coupled to the tray. An angular orientation of the tray is determined using the alignment measurement sensor removably coupled to the tray in a first position. The alignment measurement sensor is then moved to a second position on the tray that is rotated from the first position, and the angular orientation of the tray is determined using the alignment measurement sensor at the second position. An axis misalignment for at least two of a pitch axis, a roll axis, or a yaw axis of the alignment measurement sensor is then calculated to determine one or more misalignment factors. The one or more misalignment factors are then applied to correct for misalignment of the alignment measurement sensor.

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Номер записи: 12
04-07-2013 дата публикации

MACHINE SENSOR CALIBRATION SYSTEM

Номер: US20130173201A1
Автор: EDARA Thandava Krishna, HUKKERI Ramadev Burigsay
Принадлежит: CATERPILLAR INC.

A sensor calibration system for a mobile machine is disclosed. The sensor calibration system may have a first machine mounted sensor disposed on the mobile machine and configured to sense a characteristic of an offboard object and to generate a corresponding signal, and a second machine mounted sensor disposed on the mobile machine and configured to sense the characteristic of the offboard object and to generate a corresponding signal. The sensor calibration system may also have a controller in communication with the first and second machine mounted sensors. The controller may be configured to compare the characteristic of the offboard object as sensed by the first machine mounted sensor to the characteristic of the offboard object as sensed by the second machine mounted sensor, and to correct subsequent signals received from the first machine mounted sensor based on the comparison. 1. A sensor calibration system for a mobile machine , comprising:a first machine mounted sensor disposed on the mobile machine and configured to sense a characteristic of an offboard object and to generate a corresponding signal;a second machine mounted sensor disposed on the mobile machine and configured to sense the characteristic of the offboard object and to generate a corresponding signal; and compare the characteristic of the offboard object as sensed by the first machine mounted sensor to the characteristic of the offboard object as sensed by the second machine mounted sensor; and', 'correct subsequent signals received from the first machine mounted sensor based on the comparison., 'a controller in communication with the first and second machine mounted sensors, the controller being configured to2. (canceled)3. The sensor calibration system of claim 1 , further including a third machine mounted sensor disposed on the mobile machine and configured to sense the characteristic of the offboard object and generate a corresponding signal claim 1 , wherein the controller is in further ...

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Номер записи: 13
11-07-2013 дата публикации

MOVING STAGE ESTIMATION APPARATUS, METHOD AND PROGRAM

Номер: US20130179107A1
Автор: Cho Kenta, HATTORI Masanori, Iketani Naoki, SETOGUCHI Hisao
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a moving state estimation apparatus includes a sensor, a storage, a first estimation unit, a second estimation unit, a calculation unit and a correction unit. The sensor detects acceleration data. The first estimation unit estimates certainty degrees of the moving states. The second estimation unit calculates orientations of the terminal based on the acceleration data, and to estimate terminal states. The calculation unit calculates reliability degrees of the moving states. The correction unit corrects the certainty degrees in accordance with the reliability degrees, to obtain corrected moving states with the certainty degrees corrected. 1. A moving state estimation apparatus comprising:a sensor configured to detect at least three-axis acceleration of a terminal as acceleration dataa storage configured to store a moving state estimation model including moving states of a user of the terminal;a first estimation unit configured to estimate certainty degrees of the moving states based on the acceleration data and the moving state estimation model, the certainty degrees indicating degrees of certainty with which the user may be in the respective moving states;a second estimation unit configured to calculate orientations of the terminal based on the acceleration data, and to estimate terminal states indicating states of the terminal, based on the orientations of the terminal and the acceleration data;a calculation unit configured to calculate reliability degrees of the moving states, the reliability degrees indicating degrees with which combinations of the moving states and the terminal states coincide with a combination of an actual moving state of the user and an actual terminal state of the terminal; anda correction unit configured to correct the certainty degrees in accordance with the reliability degrees, to obtain corrected moving states with the certainty degrees corrected.2. The apparatus according to claim 1 , wherein the terminal ...

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Номер записи: 14
01-08-2013 дата публикации

N-use automatic calibration methodology for sensors in mobile devices

Номер: US20130197845A1
Автор: Anjia Gu, James Lim, Shang-Hung Lin, William Kerry Keal, Yuan Zheng
Принадлежит: InvenSense Inc

A method, system and computer readable medium for calibrating an accelerometer in a portable device is disclosed. The method, system and computer readable medium comprises receiving data from the accelerometer, and providing accelerometer samples from the data based upon one or more selection rules that adaptively selects data that satisfy certain criteria. The method system and computer readable medium also includes fitting the accelerometer samples to a mathematical mode. The method system and computer readable medium further includes providing a bias of the accelerometer based upon a center of the mathematical model.

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Номер записи: 15
01-08-2013 дата публикации

THICKNESS MEASUREMENT APPARATUS AND METHOD THEREOF

Номер: US20130197846A1
Автор: Kuroda Hidehiko, Sumita Akio, Yamashita Yoshihiro
Принадлежит: KABUSHIKI KAISHA TOSHIBA

A thickness measurement apparatus and method thereof being possible to measure an object to be inspected with required sensitivity stability and accuracy is provided. 1. A thickness measurement apparatus comprising:an ultrasonic wave transmission/reception device that receives and transmits an ultrasonic wave to/from a wall of a pipe to be inspected, covered with a heat insulation material;a support device that supports the ultrasonic wave transmission/reception device from an outer surface of the pipe to be inspected;a thickness calculation device that measures a propagation time of the ultrasonic wave received and transmitted by the ultrasonic wave transmission/reception device, and calculates a thickness of the pipe to be inspected;a calibration board of which a thickness is predetermined and more than a thickness of a dead zone of the ultrasonic wave transmission/reception device; anda calibration board adjustment device that moves the calibration board between a gap between the ultrasonic wave transmission/reception device and the outer surface of the pipe to be inspected and the position being different from the gap.2. The thickness measurement apparatus according to claim 1 , wherein the support device is fixed to the heat insulation material.3. The thickness measurement apparatus according to claim 1 , wherein the ultrasonic wave transmission/reception device includes an electromagnetic acoustic transducer.4. The thickness measurement apparatus according to claim 1 , wherein the ultrasonic wave transmission/reception device includes an ultrasonic wave probe including an ultrasonic wave vibrator.5. The thickness measurement apparatus according to claim 1 , further comprising a heat radiation device of which one end is contacted with an outer surface of the heat insulation material and another end is contacted with the support device claim 1 ,wherein the heat radiation device radiates a heat generated from the ultrasonic wave transmission/reception device ...

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Номер записи: 16
08-08-2013 дата публикации

METHOD AND ARRANGEMENT FOR DETERMINING ALTITUDE

Номер: US20130204567A1
Автор: LINDMAN ERIK, Nieminen Heikki
Принадлежит: SUUNTO OY

The invention relates to a portable electronic device and method for determining altitude. The device can comprise a satellite-positioning sensor for determining the elevation of the device on the basis of satellite data, a barometric sensor for measuring atmospheric-pressure information and/or an acceleration sensor for measuring acceleration information, and means for determining the altitude reading on the basis of the satellite-based elevation and the atmospheric-pressure and/or acceleration information. According to the invention, the means for determining the altitude reading are arranged to calculate a corrected altitude reading with the aid of the rate of change in elevation determined at least partly on the basis of the elevation determined on a satellite basis and atmospheric-pressure and/or acceleration information. With the aid of the invention, the altitude profile of exercise can be measured precisely. 1. A system for determining altitude comprising:a portable electronic device;a satellite-positioning sensor coupled to the device, the satellite-positioning sensor configured for determining a satellite-based elevation of the device on the basis of satellite data;at least one of a barometric sensor coupled to the device and an acceleration sensor coupled to the device, the barometric sensor configured for measuring atmospheric-pressure information at the device, the acceleration sensor configured for measuring acceleration information of the device; anda processor coupled to the device, the processor configured for determining an altitude reading on the basis of the satellite-based elevation, and at least one of the atmospheric-pressure information and the acceleration information, the processor arranged to calculate a corrected altitude reading with the aid of a rate of change of the elevation determined at least partly on the basis of a satellite-based determined elevation and at least one of the atmospheric pressure information and the acceleration ...

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Номер записи: 17
22-08-2013 дата публикации

METHOD AND A SYSTEM FOR HARMONIZING A FRAME OF REFERENCE OF AN ANGULAR POSITIONER RELATIVE TO A TERRESTRIAL FRAME OF REFERENCE

Номер: US20130213111A1
Автор: Bourzier Laurent
Принадлежит: MBDA France

A method for harmonizing a frame of reference of an angular positioner to receive a moving body relative to the terrestrial frame of reference, the angular positioner carrying a measurement device for taking inertial measurements of the moving body, the method includes obtaining, using inertial measurements taken by a measurement device on-board the angular positioner during at least one predetermined operating period, values representative of a local magnitude of gravity as perceived by the measurement device and/or of a speed of rotation of the earth, the angular positioner being held stationary during the at least one operating period; evaluating, using the obtained values, at least one angular bias affecting the frame of reference of the positioner; and harmonizing the frame of reference of the positioner relative to the terrestrial frame of reference by compensating for the at least one angular bias as evaluated in this way. 1. A harmonization method for harmonizing a frame of reference of an angular positioner suitable for receiving a moving body or a flying vehicle relative to the terrestrial frame of reference , said angular positioner carrying a measurement device for taking inertial measurements of said moving body or flying vehicle , the method comprising:obtaining, inertial measurements taken by the measurement device during at least one predetermined operating period, values representative of a local magnitude of gravity as perceived by the measurement device and/or of a speed of rotation of the earth, the angular positioner being held stationary during said at least one operating period with the values representative of a local magnitude of gravity as perceived by the measurement device and/or of a speed of rotation of the earth being obtained by summing said inertial measurements taken over said at least one operating period;evaluating, using the obtained values, at least one angular bias affecting the frame of reference of the positioner; ...

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Номер записи: 18
22-08-2013 дата публикации

ESTIMATION OF CONVENTIONAL INERTIAL SENSOR ERRORS WITH ATOMIC INERTIAL SENSOR

Номер: US20130218504A1
Автор: Fall Robert H., McJunkin Barton, Novack Mitchell
Принадлежит: HONEYWELL INTERNATIONAL INC.

Embodiments described herein provide for a method for obtaining an inertial measurement. The method includes obtaining multiple contiguous high sample rate readings during a time period from a conventional inertial sensor. Non-contiguous low sample rate reading of accumulated motion are also obtained over the time period from an atomic inertial sensor. One or more observable errors are estimated for the conventional inertial sensor based on comparing the low sample rate reading to the multiple high sample rate readings. A compensated hybrid reading is determined by compensating the high sample rate readings for the one or more observable errors based on the estimating of the one or more observable errors. 1. A method for obtaining an inertial measurement comprising:obtaining multiple contiguous high sample rate readings during a time period from a conventional inertial sensor;obtaining a non-contiguous low sample rate reading of accumulated motion over the time period from an atomic inertial sensor;estimating one or more observable errors for the conventional inertial sensor based on comparing the low sample rate reading to the multiple high sample rate readings; anddetermining a compensated hybrid reading by compensating the high sample rate readings for the one or more observable errors based on the estimating of the one or more observable errors.2. The method of claim 1 , wherein the one or more observable errors include one or more of bias claim 1 , a scale factor claim 1 , scale factor nonlinearities claim 1 , and input axis alignments.3. The method of claim 1 , wherein estimating includes using a Kalman filter to estimate the one or more observable errors and to determine a compensated hybrid reading.4. The method of claim 1 , wherein the time period is longer than a time period in which the separated atom clouds of the atomic inertial sensor accumulate a wavelength of phase difference; andresolving ambiguity of the phase difference of the second reading with ...

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Номер записи: 19
12-09-2013 дата публикации

Multiple data sources pedestrian navigation system

Номер: US20130238237A1
Автор: Ari Abramson Liani, Ilan Efrat, Ilya Leizerson
Принадлежит: Elbit Systems Ltd

A method of pedestrian navigation, based on an external positioning system and a Dead Reckoning (DR) system is provided herein. The method may employ the following steps: obtaining external positioning readings from an external positioning source and DR position readings from a pedestrian-carried platform; estimating an external positioning error, based at least partially on the external positioning and the DR position readings; and applying an estimation function to the external position readings, the DR position readings, and the external positioning errors, to yield a corrected estimated position.

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Номер записи: 20
19-09-2013 дата публикации

APPARATUSES AND METHODS FOR MAGNETOMETER ALIGNMENT CALIBRATION WITHOUT PRIOR KNOWLEDGE OF THE LOCAL MAGNETIC FIELD

Номер: US20130245984A1
Автор: Sheng Hua
Принадлежит: HILLCREST LABORATORIES, INC.

Apparatuses and methods calibrate attitude dependent magnetometer alignment parameters of a magnetometer mounted together with other angular position sensors on a device without prior knowledge of the local magnetic field and allowing a constant but unknown offset of the yaw angle in the reference attitudes with respect to an earth-fixed coordinate system. The method includes acquiring magnetic field measurements from the magnetometer and corresponding estimated angular positions subject to an unknown yaw offset relative to a gravitational reference system. The method further includes iteratively computing a scale and vector components of a quaternion representing a misalignment matrix, an inclination angle of local magnetic field, and a yaw angle offset, using an extended Kalman filter (EKF) infrastructure with a specific designed model and constraints, based on the magnetic field measurements and the corresponding estimated angular positions. 1. A method for calibrating attitude dependent magnetometer alignment parameters of a magnetometer mounted together with other angular position sensors on a device , the method comprising:acquiring magnetic field measurements from the magnetometer and corresponding estimated angular positions subject to an unknown yaw offset relative to a gravitational reference system; anditeratively computing a scale and vector components of a quaternion representing a misalignment matrix, an inclination angle of local magnetic field, and a yaw angle offset using an extended Kalman filter (EKF) infrastructure with a specific designed model and constraints, based on the magnetic field measurements and the corresponding estimated angular positions.3. The method of claim 2 , wherein the error covariance matrix of the process model of EKF is updated dynamically by multiplying a baseline constant matrix witha first factor depending on an angle difference between estimated misalignment angles between of a current system state and of a system ...

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Номер записи: 21
26-09-2013 дата публикации

Inertial sensor mode tuning circuit

Номер: US20130247668A1
Автор: Janusz Bryzek
Принадлежит: Fairchild Semiconductor Corp

This document discusses, among other things, an mode matching circuit for a inertial sensor including an oscillator circuit configured to selectively couple to a sense axis of an inertial sensor and to provide sense frequency information of the sense axis, a frequency comparator configured to receive the sense frequency information of the sense axis and drive frequency information of the inertial sensor, and to provide frequency difference information to a processor, and a programmable bias source configured to apply a bias voltage to the sense axis to set a sense frequency of the sense axis in response to a command from the processor, and to maintain a desired frequency difference between the sense frequency and a drive frequency of the inertial sensor.

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Номер записи: 22
03-10-2013 дата публикации

Information processing apparatus, information processing method, and program

Номер: US20130261962A1
Автор: Tomohisa Takaoka
Принадлежит: Sony Corp

There is provided an information processing apparatus including a traveling pitch acquiring section configured to acquire a current traveling pitch, and a speed acquiring section configured to acquire a current traveling speed extracted from an association table showing correspondence between a traveling pitch and a traveling speed based on the current traveling pitch.

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Номер записи: 23
03-10-2013 дата публикации

Compass calibration

Номер: US20130262011A1
Автор: Farshad Nourozi, Scott J. Graybill, Shawn D. Weisenburger
Принадлежит: TRIMBLE NAVIGATION LTD

A system, method, and computer program product are provided for calibrating a sensor device, such as an accelerometer, gyroscope, and/or magnetometer. The sensor device provides measurements, and a determination if the sensor device is in a steady state is made based at least partly on the measurements. If the sensor device is in a steady state then measurement data is stored in a memory, and the sensor device is calibrated at least partly with the stored data. A set of such steady points is gathered with the sensor device in various spatial orientations, preferably with the steady point orientations spaced appropriately apart to ensure precise calibration throughout the range of possible orientations. Calibration parameters are determined by fitting the set of steady point measurements to an ellipsoid. Active audio and visual guidance may be provided to a user to assist with orienting the sensor device during calibration.

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Номер записи: 24
10-10-2013 дата публикации

SENSOR DEVICE, MANUFACTURING METHOD OF SENSOR DEVICE AND ELECTRONIC APPARATUS

Номер: US20130263660A1
Автор: SHIBATA Tsunenori
Принадлежит: SEIKO EPSON CORPORATION

A sensor device includes a first sensor element which detects an angular velocity around z axis and a second sensor element which detects an angular velocity around x axis, the relationship fd>fd and fmfd and fmfs and fd>fs is satisfied, when a detection frequency of the first sensor element is set to fs and a detection frequency of the second sensor element is set to fs.'}5. The sensor device according to claim 1 ,wherein the first sensor element and the second sensor element each ...

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Номер записи: 25
10-10-2013 дата публикации

MEMS DEVICE AUTOMATIC-GAIN CONTROL LOOP FOR MECHANICAL AMPLITUDE DRIVE

Номер: US20130268227A1
Автор: Lee Shungneng, Opris Ion, Tao Hai
Принадлежит: Fairchild Semiconductor Corporation

This document discusses, among other things, apparatus and methods for digital automatic gain control for driving a MEMS device, such as a proof mass. In an example, an apparatus can include a driver configured to oscillate a proof mass of a MEMS device, a charge-to-voltage (C2V) converter configured to provide oscillation information of the proof mass, an analog-to-digital converter (ADC) configured to provide a digital representation of the oscillation information, and a digital, automatic gain control circuit to provide oscillation amplitude error information using a comparison of the oscillation information to target amplitude information, and to provide a digital drive command signal using an amplified representation of the oscillation amplitude error information. 1. An apparatus comprising:a driver configured to oscillate a proof mass of a MEMS gyroscope;a charge-to-voltage (C2V) converter configured to receive a sense signal from a MEMS gyroscope and to provide oscillation information of the proof mass;an analog-to-digital converter (ADC) configured to receive the oscillation information of the proof mass and to provide a digital representation of the oscillation information; anda digital, automatic gain control circuit configured to receive the digital representation of the oscillation information, to provide oscillation amplitude error information using a comparison of the oscillation information to target amplitude information, and to provide a digital drive command signal using an amplified representation of the oscillation amplitude error information.2. The apparatus of claim 1 , wherein the ADC is configured to provide the digital representation of the sense signal using a single-bit data stream.3. The apparatus of claim 2 , wherein the digital claim 2 , automatic gain control circuit includes a down-sample module to receive the single-bit data stream and provide a second digital representation of the sense signal using a first multi-bit data stream.4. ...

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Номер записи: 26
10-10-2013 дата публикации

MEMS DEVICE QUADRATURE SHIFT CANCELLATION

Номер: US20130268228A1
Автор: Lee Shungneng, Opris Ion, Tao Hai
Принадлежит: Fairchild Semiconductor Corporation

This document discusses, among other things, apparatus and methods quadrature cancelation of sense information from a micro-electromechanical system (MEMS) device, such as a MEMS gyroscope. In certain examples, a quadrature correction apparatus can include a drive charge-to-voltage (C2V) converter configured to provide drive information of a proof mass of a MEMS gyroscope, a sense C2V converter configured to provide sense information of the proof mass, a phase-shift module configured to provide phase shift information of the drive information, a drive demodulator configured to receive the drive information and the phase shift information and to provide demodulated drive information, a sense demodulator configured to receive the sense information and the phase shift information and to provide demodulated sense information, and wherein the quadrature correction apparatus is configured to provide corrected sense information using the demodulated drive information and the demodulated sense information. 1. A quadrature correction apparatus comprising:a drive charge-to-voltage (C2V) converter configured to provide drive information of a proof mass of a MEMS gyroscope;a sense C2V converter configured to provide sense information of the proof mass;a phase-shift module configured to provide phase shift information of the drive information;a drive demodulator configured to receive the drive information and the phase shift information and to provide demodulated drive information;a sense demodulator configured to receive the sense information and the phase shift information and to provide demodulated sense information; andwherein the quadrature correction apparatus is configured to provide corrected sense information using the demodulated drive information and the demodulated sense information.2. The apparatus of claim 1 , including:a summing node configured to provide the corrected sense information using the demodulated drive information and the demodulated sense information. ...

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Номер записи: 27
17-10-2013 дата публикации

MEMS QUADRATURE CANCELLATION AND SIGNAL DEMODULATION

Номер: US20130269413A1
Автор: Opris Ion, Tao Hai
Принадлежит: Fairchild Semiconductor Corporation

In certain examples, a quadrature cancellation apparatus can include a drive charge amplifier configured to couple to a proof mass of a MEMS device and to provide oscillation motion information, a first sense charge amplifier configured to couple to the proof mass and to provide first sense information of a first movement of the MEMS device, a first programmable amplifier configured to receive the oscillation motion information and provide amplified oscillation motion information, a first summer configured to cancel quadrature error of the first sense information using the first sense information and the amplified oscillation motion information to provide quadrature-corrected first sense information, a phase shifter configured to receive the oscillation motion information and to provide carrier information, and a first multiplier configured to provide demodulated first sense information using the quadrature-corrected first sense information and the carrier information. 1. A quadrature cancellation apparatus comprising:a drive charge amplifier configured to couple to a proof mass of a MEMS device and to provide oscillation motion information;a first sense charge amplifier configured to couple to the proof mass and to provide first sense information of a first movement of the MEMS device;a first programmable amplifier configured to receive the oscillation motion information and provide amplified oscillation motion information;a first summer configured to cancel quadrature error of the first sense information using the first sense information and the amplified oscillation motion information to provide quadrature-corrected first sense information;a phase shifter configured to receive the oscillation motion information and to provide carrier information; anda first multiplier configured to provide demodulated first sense information using the quadrature-corrected first sense information and the carrier information.2. The apparatus of claim 1 , including a first baseband ...

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Номер записи: 28
17-10-2013 дата публикации

Vibrating gyroscope and corresponding manufacturing process

Номер: US20130269433A1
Автор: Alain Jeanroy
Принадлежит: Sagem Defense Securite SA

The invention relates to a vibrating gyroscope ( 1 ), characterised in that it comprises a base ( 2 ), a resonator ( 3 ) comprising a body ( 4 ) of generally cylindrical shape terminating in a distal face ( 5 ), to the side opposite the base ( 2 ), said face ( 5 ) comprising at least one through hole ( 13 ), a plurality of piezoelectric elements ( 10 ) placed in contact with the resonator ( 3 ), vibration control and processing modules ( 18 ) arranged at least in part on the base ( 2 ), and at least one electrical connection ( 15 ) passing through the body ( 4 ) of the resonator ( 3 ) via said hole ( 13 ), and electrically connecting said modules ( 18 ) of the base ( 2 ) and the plurality of piezoelectric elements ( 10 ) for controlling and measuring the vibration of the resonator ( 3 ).

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Номер записи: 29
31-10-2013 дата публикации

MODE-MATCHED SINGLE PROOF-MASS DUAL-AXIS GYROSCOPE AND METHOD OF FABRICATION

Номер: US20130283911A1
Автор: Ayazi Farrokh, Sung Wang-kyung, Zaman Mohammad
Принадлежит:

A single proof-mass, dual-axis gyroscope apparatus comprises a resonating body member and first and second electrodes each capacitively coupled to the resonating body member by a respective lateral capacitive air gap and a vertical capacitive air gap. The width of one of the lateral capacitive air gap of the first electrode is substantially smaller than the vertical capacitive air gap. The width of one of the vertical capacitive air gap of the second electrode is substantially smaller than the lateral capacitive air gap. The apparatus claimed can address the process variation such as vertical and lateral dimension variation by electrostatic tuning method. 1. A single proof-mass , dual-axis gyroscope apparatus comprising:a resonating body member;first and second electrodes each capacitively coupled to the resonating body member by a respective lateral capacitive dielectric gap and a vertical capacitive dielectric gap; andwherein a width of one of the lateral capacitive dielectric gap and the vertical capacitive dielectric gap of the first electrode is substantially smaller than that of a similar dielectric gap of the second electrode.2. The apparatus of claim 1 , wherein the resonating body member is connected to a central structure.3. The apparatus of claim 2 , wherein the resonating body member is supported by at least one support member connecting the resonating body member to the central structure.4. The apparatus of claim 1 , wherein the resonating body member is an annulus.5. The apparatus of claim 1 , wherein the resonating body member is a polygon.6. The apparatus of claim 1 , wherein the first electrode is capacitively coupled to the resonating body member by a first lateral capacitive dielectric gap substantially smaller than a first vertical capacitive dielectric gap claim 1 , and wherein the second electrode is capacitively coupled to the resonating body member by a second vertical capacitive dielectric gap substantially smaller than a second lateral ...

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Номер записи: 30
07-11-2013 дата публикации

VIBRATING PIECE AND MANUFACTURING METHOD FOR THE VIBRATING PIECE, GYRO SENSOR, AND ELECTRONIC APPARATUS AND MOBILE BODY

Номер: US20130291639A1
Автор: NISHIZAWA Ryuta
Принадлежит: SEIKO EPSON CORPORATION

A vibrating piece includes a driving arm at least partially formed by a piezoelectric body, the driving arm including a first surface spreading along the direction of excited vibration, a second surface on the opposite side of the first surface, a first side surface configured to connect the first surface and the second surface, and a second side surface arranged on the opposite side of the first side surface and configured to connect the first surface and the second surface. The vibrating piece includes first electrodes arranged at least on one surface side of the first surface and the second surface and second electrodes arranged on at least one surface side of the first side surface and the second side surface. The first electrodes are provided asymmetrically with respect to an equally dividing plane of the driving arm orthogonal to the direction of the excited vibration of the driving arm. 1. A vibrating piece comprising:a driving arm at least partially formed by a piezoelectric body, the driving arm including a first surface spreading along a direction of excited vibration, a second surface on an opposite side of the first surface, a first side surface configured to connect the first surface and the second surface, and a second side surface arranged on an opposite side of the first side surface and configured to connect the first surface and the second surface;first electrodes arranged at least above one surface side of the first surface and the second surface; andsecond electrodes arranged above at least one surface side of the first side surface and the second side surface, whereinthe first electrodes are provided asymmetrically with respect to an equally dividing plane of the driving arm orthogonal to the direction of the excited vibration of the driving arm.2. The vibrating piece according to claim 1 , whereinthe first electrodes are arranged above the first surface side,the second electrodes are arranged above the first side surface side and the second ...

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Номер записи: 31
07-11-2013 дата публикации

Technique for calibrating dead reckoning positioning data

Номер: US20130297204A1
Автор: Florian Bartels
Принадлежит: ELEKTROBIT AUTOMOTIVE GMBH

A technique for calibrating sensor data used for dead reckoning positioning comprises the steps of simultaneously recording sensor data of at least one dead reckoning positioning sensor and position data of a position sensor during travel, comparing a first travel path derived from the position data with a second travel path derived from the sensor data, and calibrating the sensor data based on the comparison.

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Номер записи: 32
21-11-2013 дата публикации

Method for determining a measurable target variable and corresponding system

Номер: US20130311123A1
Автор: Erik Lindman, Heikki Nieminen
Принадлежит: SUUNTO OY

The invention relates to a method and a system for determining a target variable to be measured in a mobile device. A first physical variable is measured with the aid of a first sensor and a second physical variable with the aid of a second sensor. The second physical variable is different to the first physical variable, or is measured using a different technique. The value of the target variable is calculated with the aid of the measurement of the first and second physical variables. An estimate for the target variable is determined with the aid of at least the measurement of the first physical variable. At least a first error estimate is determined, which depicts the accuracy of the measurement of the first physical variable. The estimate of the target variable is filtered using both the first error estimate and the measurement of the second physical variable.

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Номер записи: 33
28-11-2013 дата публикации

VIBRATOR ELEMENT, METHOD OF MANUFACTURING VIBRATOR ELEMENT, ANGULAR VELOCITY SENSOR, ELECTRONIC DEVICE, AND MOVING BODY

Номер: US20130312519A1
Автор: ICHIKAWA Fumio
Принадлежит: SEIKO EPSON CORPORATION

A vibrator element including: a base portion; vibrating arms which extend from the base portion; a first drive section and a second drive section, and a first detecting section and a second detecting sensor which are respectively provided in the vibrating arms; adjusting arms which extend from the base portion in parallel to the vibrating arms; and a first adjusting section and a second adjusting section which are respectively provided on a principal surface of the adjusting arms, wherein, in the first adjusting section and the second adjusting section, a first electrode, piezoelectric layers, and adjustment electrodes are laminated on the first principal surface to be formed, and output signals of the first adjusting section and the second adjusting section are in antiphase to charges generated by the first detecting section and the second detecting section when no angular velocity is added to the vibrating arms. 1. A vibrator element comprising:a base portion;a vibrating arm which extends from the base portion;a drive section and a detecting section provided in the vibrating arm;an adjusting arm which extends from the base portion along an extension direction of the vibrating arm; andan adjusting section which is provided above a principal surface of the adjusting arm,wherein the adjusting section has a first electrode, a second electrode, and a piezoelectric layer provided between the first and second electrodes, andan output signal of the adjusting arm is in antiphase to a charge output from the adjusting section when no physical amount is added to the vibrating arm.2. The vibrator element according to claim 1 ,wherein, at a tip end portion of the detecting section on an opposite side to the base portion, a wide portion having a greater area than other parts of the detecting section is provided closer to a tip end side than the drive section.3. The vibrator element according to claim 1 ,wherein a length of the adjusting arm is shorter than a length of the ...

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Номер записи: 34
05-12-2013 дата публикации

METHOD AND DEVICE FOR ASCERTAINING A PHYSICAL VARIABLE IN A POSITION TRANSDUCER SYSTEM

Номер: US20130325384A1
Автор: Buehrle Ralf, WAGNER Alexandre
Принадлежит: ROBERT BOSCH GMBH

A method for ascertaining a value of a physical variable in a position transducer system includes the steps of providing a computation model, which maps a response of the position transducer system, wherein the computation model includes a model function and one or multiple parameter(s); ascertaining a value of at least one system variable at one or multiple points in time; determining the parameters of the computation model from one or multiple value(s) of the at least one system variable determined at different points in time; and determining the value of the physical variable as a function of the one or the multiple determined parameters. 1. A method for ascertaining a value of a physical variable in a position transducer system , comprising:providing a computation model, which maps a response of the position transducer system, the computation model including a model function and one or multiple parameters;ascertaining a value of at least one system variable at one or multiple points in time;determining the parameters of the computation model from one or multiple values of the at least one system variable determined at different points in time; anddetermining the value of the physical variable as a function of the one or the multiple determined parameters.2. The method according to claim 1 , wherein a position of the actuator and/or an electric trigger variable that is a trigger voltage of a position transducer drive of the position transducer system claim 1 , is/are used as the at least one system variable.3. The method according to claim 1 , wherein a temperature or a current in a position transducer drive of the position transducer system is determined as the physical variable.4. The method according to claim 1 , wherein the parameters are determined anew at regular intervals in real time.5. The method according to claim 1 , wherein the physical variable is determined with the aid of an allocation function from the determined parameters.6. The method according ...

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Номер записи: 35
12-12-2013 дата публикации

METHODS FOR IMPROVED HEADING ESTIMATION

Номер: US20130332098A1
Автор: Funk Benjamin E., Hakim Dan, Karvounis John, Teolis Carole, Young Travis
Принадлежит:

Methods for calibrating a body-worn magnetic sensor by spinning the magnetic sensor 360 degrees to capture magnetic data; if the spin failed to produce a circle contained in an x-y plane fit a sphere to the captured data; determining offsets based on the center of the sphere; and removing the offsets that are in the z-direction. Computing a magnetic heading reliability of a magnetic sensor by determining an orientation of the sensor at one location; transforming the orientation between two reference frames; measuring a first vector associated with the magnetic field of Earth at the location; processing the first vector to generate a virtual vector when a second location is detected; measuring a second vector associated with the magnetic field of Earth at the second location; and calculating the magnetic heading reliability at the second location based on a comparison of the virtual vector and the second vector. 1. A method for calibrating in real-time a body-worn magnetic sensor , the method comprises:capturing magnetic data from the magnetic sensor when the sensor moves along a 360 degree spun path;if the captured magnetic data fails to produce a circle contained in an x-y plane, fitting a sphere to the captured magnetic data;determining x-axis, y-axis and z-axis offsets for the captured magnetic data fit to the sphere based on a center of the sphere;removing the z-axis offsets; andusing the x-axis offsets and y-axis offsets to calibrate the magnetic sensor.2. A computing system for computing an indicator of a magnetic heading reliability of a magnetic sensor , the computing system comprising:a processor; determine an orientation of the magnetic sensor at a first location;', 'generate a filter that transforms the orientation between two reference frames;', 'measure a first vector associated with the magnetic field of Earth at the first location;', 'when a second location of the magnetic sensor is detected, process the first vector through the filter to generate a ...

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Номер записи: 36
19-12-2013 дата публикации

MICROMACHINED PIEZOELECTRIC Z-AXIS GYROSCOPE

Номер: US20130333175A1
Автор: Acar Cenk, Black Justin Phelps, Ganapathi Srinivasan Kodaganallur, Petersen Kurt Edward, Shenoy Ravindra V., STEPHANOU Philip Jason
Принадлежит: QUALCOMM MEMS Technologies, Inc.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for making and using gyroscopes. Such gyroscopes may include a central anchor, a sense frame disposed around the central anchor, a plurality of sense beams configured for connecting the sense frame to the central anchor and a drive frame disposed around and coupled to the sense frame. The gyroscope may include pairs of drive beams disposed on opposing sides of the sense frame. The gyroscope may include a drive frame suspension for substantially restricting a drive motion of the drive frame to that of a substantially linear displacement along the first axis. The sense frame may be substantially decoupled from drive motions of the drive frame. Such devices may be included in a mobile device, such as a mobile display device. 1. A method of fabricating a gyroscope , comprising:depositing conductive material on a substrate;forming a central anchor;forming a sense frame disposed around the central anchor;forming a plurality of sense beams, each of the sense beams including piezoelectric sense electrodes, the sense beams capable of connecting the sense frame to the central anchor;forming a drive frame disposed around and coupled to the sense frame, the drive frame including a first side and a second side;forming at least one pair of drive beams disposed on opposing sides of the sense frame, the drive beams capable of driving the first side of the drive frame in a first direction along a first axis in the plane of the drive frame, the drive beams being further capable of driving the second side of the drive frame in a second and opposing direction along the first axis;forming a drive frame suspension capable of substantially restricting a drive motion of the drive frame to that of a substantially linear displacement along the first axis, wherein forming the drive frame suspension involves forming a plurality of flexures, each flexure of the plurality of ...

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Номер записи: 37
19-12-2013 дата публикации

HYBRID LOCATION TEST SYSTEM AND METHOD

Номер: US20130338958A1
Автор: Butler Brock, Davis Jason, Ford Colin, Garapaty Ram, Parameswaran Manikantan, Pottle John, Shanishchara Kunal
Принадлежит: Spirent Communications, Inc.

The technology disclosed relates to testing hybrid positioning systems, including systems that rely on MEMS sensors. In particular, it relates to methods and devices for configuring and running tests of hybrid positioning systems. 1. A method of testing positioning capabilities of a portable device under test , the method including: a micro-electromechanical sensor signal emulator; and', 'a GNSS satellite constellation RF signal emulator;, 'communicating with and controlling operation of one or more test instruments, wherein the test instruments includepopulating a first panel to be displayed with an identification of the test instruments being controlled; a travel path or reference to a travel path followed by the portable device during a test, including for at least the micro-electromechanical sensor signal emulator a pedestrian model or a vehicle ride model that describes orientation and motion of the portable device as it moves along the travel path; and', 'instructions or references to instructions to be run on the test instruments as the portable device is tested along the travel path;, 'retrieving from storage a test specification file that includesdistributing the retrieved instructions or references to the instructions to the test instruments; andduring the test, populating third and fourth panels to be displayed, respectively, with reports of signals from the micro-electromechanical sensor signal emulator and the GNSS satellite constellation RF signal emulator.2. The method of claim 1 , wherein during the test claim 1 , populating a second panel to be displayed with a map representing at least a section of the travel path and showing a current location of the portable device.3. The method of claim 1 , wherein the micro-electromechanical sensor signal emulator injects sensor signals representing at least magnetometer directional orientation and inertial acceleration.4. The method of claim 1 , wherein the pedestrian model or the vehicle ride model describes ...

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Номер записи: 38
26-12-2013 дата публикации

Method and system for compensating for soft iron magnetic disturbances in a heading reference system

Номер: US20130345972A1
Автор: Shahram Askarpour
Принадлежит: Individual

A method and system for compensating for significant soft iron magnetic disturbances in a heading reference system, such as an aircraft heading reference system, such as an integrated standby unit; or a vehicle inertial system, provides a heading correction signal to the heading reference system when a detected difference in value between a gyro heading relative to magnetic north and a magnetometer reading during a defined measurement period exceeds a predetermined acceptable threshold value of change, such as one based on the expected gyro drift over that period. Upon receipt of the heading correction signal, the gyro heading is adjusted to maintain an accurate heading relative to true magnetic north. If this threshold value is not exceeded, then the magnetometer reading is used for the heading value. This method is iteratively repeated in order to continually maintain an accurate heading and may be employed for each heading measurement axis.

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Номер записи: 39
02-01-2014 дата публикации

VIBRATORY GYROSCOPE

Номер: US20140000366A1
Автор: BLOMQVIST Anssi
Принадлежит:

A sensing device comprising a micromechanical gyroscope, the gyroscope comprising an improved sensing device with a micromechanical gyroscope, where the resonance frequency of the first mechanical resonator and the resonance frequency of the second mechanical resonator are adjusted to essentially coincide. The device comprises a feed-back loop connected to the second mechanical resonator, the quality factor of the combination of the feed-back loop and the second mechanical resonator being less than 10. More accurate sensing is achieved without essentially adding complexity to the sensor device configuration. 1. A sensing device comprising a micromechanical gyroscope , the gyroscope comprising:a first mechanical resonator for drive mode vibration;a second mechanical resonator coupled to the first mechanical resonator for sense mode vibration corresponding to the angular velocity, wherein the resonance frequency of the first mechanical resonator and the resonance frequency of the second mechanical resonator are initially adjusted to essentially coincide;a damping feed-back loop connected to the second mechanical resonator, the quality factor of the combination of the feed-back loop and the second mechanical resonator being less than 10.2. A sensing device according to claim 1 , whereinthe feed-back loop comprises a transducer element and a controlling element;the transducer element comprises a first transducer and a second transducer;the first transducer is configured to output a first electrical signal that corresponds to the sense mode vibration;the control element is configured to receive from the first transducer the first electrical signal and generate a second electrical signal according to a specific response function, the response function defining correspondence between values of the first electrical signal and the second electrical signal;the control element is configured to feed the second electrical signal to the second transducer;the second transducer is ...

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Номер записи: 40
09-01-2014 дата публикации

DOWNHOLE INSTRUMENT CALIBRATION DURING FORMATION SURVEY

Номер: US20140007646A1
Автор: Dudley James H., Golla Christopher Allen, Herrera Adan Hernandez, Marzouk Joe, Rodney Paul F.
Принадлежит: Halliburton Energy Services, Inc.

A downhole sensor calibration apparatus includes a rotational or gimbaling mechanism for guiding a sensing axis of an orientation responsive sensor through a three-dimensional orbit about three orthogonal axes. A method includes using measurements taken over the three-dimensional orbit to calibrate the sensor and determine other characteristics of the sensor or tool. 1. A downhole sensor calibration apparatus comprising:a body having an axis; anda rotational mechanism supported by the body, the mechanism including at least one sensor;wherein the rotational mechanism is operable to rotate the sensor relative to three orthogonal axes.2. The apparatus of wherein the rotational mechanism is operable to rotate the sensor in three orthogonal planes.3. The apparatus of wherein the rotational mechanism includes an outer cage rotatable about the body axis claim 1 , and a sensor chassis supported in the outer cage and rotatable about an axis orthogonal to the body axis.4. The apparatus of wherein the rotational mechanism comprises a gimbaling mechanism.5. The apparatus of wherein the at least one sensor comprises an orientation responsive sensor wherein a sensing axis of the sensor is sensitive to the orientation of the sensor.6. The apparatus of wherein the at least one sensor comprises an accelerometer claim 5 , a magnetometer claim 5 , an inclinometer claim 5 , a gyroscope claim 5 , or a combination thereof.7. The apparatus of wherein the rotational mechanism contains a second sensor.8. The apparatus of wherein a second sensor is mounted outside of the rotational mechanism.9. The apparatus of wherein the sensor chassis comprises:rotational support members to rotate a sensing axis of the sensor about the orthogonal axis; anda gear;wherein the gear is rotatably coupled to a second gear;wherein the gears comprise interlocking, beveled gears; andwherein the second gear is coupled to a rotatable shaft.10. The apparatus of wherein the rotational mechanism is operable to move a ...

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Номер записи: 41
16-01-2014 дата публикации

Micromachined piezoelectric x-axis gyroscope

Номер: US20140013557A1
Автор: Cenk Acar, Justin Phelps Black, Kurt Edward Petersen, Philip Jason Stephanou, Ravindra V. Shenoy, Srinivasan Kodaganallur Ganapathi
Принадлежит: Qualcomm Mems Technologies Inc

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for making and using gyroscopes. Such gyroscopes may include a sense frame, a proof mass disposed outside the sense frame, a pair of anchors and a plurality of drive beams. The plurality of drive beams may be disposed on opposing sides of the sense frame and between the pair of anchors. The drive beams may connect the sense frame to the proof mass. The drive beams may be configured to cause torsional oscillations of the proof mass substantially in a first plane of the drive beams. The sense frame may be substantially decoupled from the drive motions of the proof mass. Such devices may be included in a mobile device, such as a mobile display device.

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Номер записи: 42
16-01-2014 дата публикации

POSTURE CALIBRATION FOR ACTIVITY MONITORING

Номер: US20140015687A1
Автор: FERDOSI Nima, NARASIMHAN Ravi
Принадлежит: VITAL CONNECT, INC.

A method and system for activity monitoring of a user are disclosed. In a first aspect, the method comprises calibrating posture by the user to determine a calibration vector. The method includes validating the calibration vector by comparing an anteroposterior axis to a threshold, wherein activity of the user is monitored using the validated calibration vector. In a second aspect, a wireless sensor device comprises a processor and a memory device coupled to the processor, wherein the memory device includes an application that, when executed by the processor, causes the processor to receive a posture calibration request from the user and to determine a calibration vector based on the received request. The application, when executed by the processor, further causes the processor to validate the calibration vector by comparing an anteroposterior axis to a threshold, wherein activity of the user is monitored using the validated calibration vector. 1. A method for activity monitoring of a user , the method comprising:calibrating posture by the user to determine a calibration vector;validating the calibration vector by comparing an anteroposterior axis to a threshold, wherein activity of the user is monitored using the validated calibration vector.2. The method of claim 1 , further comprising:in response to a validation failure, monitoring the activity of the user independent of the calibration vector and reporting an unknown posture for the user; andcalibrating the posture implicitly when the user is walking.3. The method of claim 2 , further comprising:in response to the validation failure, determining whether to recalibrate the posture explicitly.4. The method of claim 1 , wherein the validating further comprises:ensuring a magnitude of acceleration along the anteroposterior axis is less than the threshold.5. The method of claim 2 , wherein the validation failure occurs when a magnitude of acceleration along the anteroposterior axis is greater than or equal to the ...

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Номер записи: 43
30-01-2014 дата публикации

CONTROL MOMENT GYROSCOPES INCLUDING TORSIONALLY-STIFF SPOKED ROTORS AND METHODS FOR THE MANUFACTURE THEREOF

Номер: US20140026688A1
Автор: Davis Porter, Johnson Theodis, Stevens Carlos J.
Принадлежит: HONEYWELL INTERNATIONAL INC.

Embodiments of control moment gyroscopes (CMGs) are provided, as are embodiments of a method for fabricating CMGs. In one embodiment, a CMG includes a stator housing, an inner gimbal assembly (IGA), and a torque motor coupled to the stator housing and configured to rotate the IGA housing about a gimbal axis to selectively generate a desired output torque during operation of the CMG. The IGA includes, in turn, an IGA support structure housing rotatably coupled to the stator housing, a monolithic CMG rotor rotatably mounted to the IGA support structure housing, and a spin motor coupled to the IGA support structure housing and configured to rotate the monolithic CMG rotor about a spin axis. 1. A control moment gyroscope (CMG) , comprising:a stator housing; an IGA support structure rotatably coupled to the stator housing;', 'a monolithic CMG rotor rotatably mounted to the IGA support structure; and', 'a spin motor coupled to the IGA support structure and configured to rotate the monolithic CMG rotor about a spin axis; and, 'an inner gimbal assembly (IGA), comprisinga torque motor coupled to the stator housing and configured to rotate the IGA support structure housing about a gimbal axis to selectively generate a desired output torque during operation of the CMG.2. A CMG according to wherein the monolithic CMG rotor comprises:a rotor shaft;a rotor rim; anda plurality of torsionally-stiff radial spokes circumferentially spaced about the spin axis, each of the plurality of torsionally-stiff radial spokes having an inner spoke end integrally joined to the rotor shaft and having an outer spoke end integrally joined to the rotor rim.3. A CMG according to wherein the average axial height of each of the plurality of torsionally-stiff radial spokes is at least twice a chordal thickness thereof4. A CMG according to wherein an axial height of the inner spoke end is closer in magnitude to the length of the rotor shaft than to an axial height of the outer spoke end.5. A CMG ...

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Номер записи: 44
13-02-2014 дата публикации

MICROMACHINED PIEZOELECTRIC X-AXIS GYROSCOPE

Номер: US20140041174A1
Автор: Acar Cenk, Black Justin Phelps, Ganapathi Srinivasan Kodaganallur, Petersen Kurt Edward, Shenoy Ravindra V., STEPHANOU Philip Jason
Принадлежит: QUALCOMM MEMS Technologies, Inc.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for making and using gyroscopes. Some gyroscopes include a drive frame, a central anchor and a plurality of drive beams disposed on opposing sides of the central anchor. The drive beams may connect the drive frame to the central anchor. The drive beams may include a piezoelectric layer and may be configured to cause the drive frame to oscillate torsionally in a plane of the drive beams. The gyroscope may also include a proof mass and a plurality of piezoelectric sense beams. At least some components may be formed from plated metal. The drive frame may be disposed within the proof mass. The drive beams may constrain the drive frame to rotate substantially in the plane of the drive beams. Such devices may be included in a mobile device, such as a mobile display device. 1. A method of fabricating a gyroscope , the method comprising:depositing conductive material on a substrate;forming an anchor on the substrate;forming a drive frame on the anchor;forming pairs of drive beams on opposing sides of the anchor, the drive beams connecting the drive frame to the anchor, the drive beams being configured to constrain the drive frame to rotate substantially in the plane of the drive beams;forming a proof mass around the drive frame; andforming a plurality of sense beams that connect the drive frame to the proof mass, the sense beams being tapered sense beams having a width that decreases with increasing distance from the anchor, the sense beams being configured to allow sense motions of the proof mass in a sense plane substantially perpendicular to the plane of the drive beams in response to an applied angular rotation.2. The method of claim 1 , wherein forming the drive beams includes the following:depositing a first metal layer that is in contact with the conductive material;depositing a piezoelectric layer on the first metal layer;depositing a second metal ...

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Номер записи: 45
13-03-2014 дата публикации

HEMITOROIDAL RESONATOR GYROSCOPE

Номер: US20140068931A1
Автор: Cabuz Eugen, Compton Robert, Horning Robert D., Johnson Burgess R.
Принадлежит: HONEYWELL INTERNATIONAL INC.

A method for fabricating a vibratory structure gyroscope is provided herein. An annular cavity is formed in a first surface of a substrate, the annular cavity defining an anchor post located in a central portion of the annular cavity. A bubble layer is formed over the first surface of the substrate and over the annular cavity. The substrate and the bubble layer are heated to form a hemitoroidal bubble in the bubble layer over the annular cavity. A sacrificial layer is deposited over the hemitoroidal bubble of the bubble layer and an aperture is formed in the sacrificial layer, the aperture disposed over the anchor post in the annular cavity. A resonator layer is deposited over the sacrificial layer and the sacrificial layer between the bubble layer and the resonator layer is removed. 1. A method of fabricating a vibratory structure gyroscope , the method comprising:forming an annular cavity in a first surface of a substrate, the annular cavity defining an anchor post located in a central portion of the annular cavity;forming a bubble layer over the first surface of the substrate and over the annular cavity;heating the substrate and the bubble layer to form a hemitoroidal bubble in the bubble layer over the annular cavity;depositing a sacrificial layer over the hemitoroidal bubble of the bubble layer;forming an aperture in the sacrificial layer, the aperture disposed over the anchor post in the annular cavity;depositing a resonator layer over the sacrificial layer; andremoving the sacrificial layer between the bubble layer and the resonator layer.2. The method of claim 1 , further comprising:depositing a first conductive layer over the hemitoroidal bubble in the bubble layer before depositing the sacrificial layer;etching the first conductive layer to form a plurality of electrodes;depositing a second conductive layer over the sacrificial layer; andetching the second conductive layer to form an electrode layer.3. The method of claim 2 , further comprising:depositing ...

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Номер записи: 46
13-03-2014 дата публикации

IMAGING RANGE FINDER FABRICATION

Номер: US20140071427A1
Автор: LAST Matthew Emanuel
Принадлежит: Apple Inc.

Fabrication of an imaging range finder is disclosed. The range finder can be formed of an imaging lens and an array of emitters and photodetectors in optical communication with the lens. The emitters in the array can be formed to emit light that is directed by the lens toward a target object. The photodetectors in the array can be formed to detect light received from the object through the lens and onto the photodetectors. The lens, the array, or both can be movable to adjust the light emitted by the range finder. The range finder can be formed to find the object's range based on characteristics of the emitted light and/or the detected light. 1. An imaging range finder comprising:an array formed of a set of emitters capable of emitting light and a set of photodetectors capable of detecting light;an imaging lens formed proximate to and in optical communication with the array and capable of collimating the emitted light from the emitters and focusing light received from an object onto the photodetectors; anda driver circuit formed proximate to the array and capable of driving the array.2. The range finder of claim 1 , further comprising:a device coupled to at least one of the array or the lens to move the array or the lens,wherein the driver circuit is coupled to the device to drive the device.3. The range finder of claim 1 , further comprising:a movable prism formed between the lens and the array,wherein the driver circuit is coupled to the prism to cause the prism to move.4. The range finder of claim 1 , further comprising:a second imaging lens formed in alignment with the imaging lens; anda device coupled to the imaging lens and the second imaging lens to move the lenses,wherein the driver circuit is coupled to the device to drive the device.5. The range finder of claim 1 , further comprising:a second imaging lens formed adjacent to the imaging lens to receive scattered light from the object and focus the scattered light onto the photodetectors.6. The range finder ...

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Номер записи: 47
13-03-2014 дата публикации

Using magnetometer data to calculate angular rate measurement bias

Номер: US20140074424A1
Автор: Hengliang Zhang, Hung A. Pham
Принадлежит: Apple Inc

Implementations are disclosed for using magnetometer measurements to estimate bias for angular rate measurements provided by an angular rate sensor (e.g., a gyro sensor). In some implementations, a bias estimator running on a device is configured to determine if the device is rotating based on the magnetometer measurements. If the device is not rotating, a dynamic bias is calculated and added to a temperature compensated static bias to provide a total angular rate measurement bias. The total angular rate measurement bias can be provided to an attitude estimation system where it is used to update an attitude (orientation) of the device. In some implementations, the angular rate measurements are used to determine if the device is oscillating according to a threshold value. If the device is not rotating and the device is oscillating according to a threshold value, the static bias is updated in a calibration table.

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Номер записи: 48
20-03-2014 дата публикации

POSITIONING METHOD AND ELECTRONIC DEVICE UTILIZING THE SAME

Номер: US20140081588A1
Автор: Chen Jie-Min, HSIEH Tsung-Ying, Hsu Chin-Lien, Tien Kai-Wen
Принадлежит: Quanta Computer Inc.

A positioning method and an electronic device utilizing the same are disclosed. The positioning method, adopted by an electronic device for positioning a mobile device, includes: determining a preliminary plane location of the mobile device; obtaining a tilt angle of the mobile device; and correcting an error in the preliminary plane location based on the tilt angle, to obtain the correct plane location of the mobile device. 1. A positioning method , adopted by an electronic device for positioning a mobile device , comprising:determining a preliminary plane location of the mobile device;obtaining a tilt angle of the mobile device;correcting an error in the preliminary plane location based on the tilt angle, to obtain a correct plane location of the mobile device;obtaining a first distance between the mobile device and a first reference device, and a first spatial location of the first reference device;obtaining a second distance between the mobile device and a second reference device, and a second spatial location of the second reference device;determining two possible vertical locations for the mobile device according to the correct plane location, the first distance, and the first spatial location; anddetermining one of the two possible vertical locations as a correct vertical location for the mobile device according to the correct plane location, the second distance, and the second spatial location;wherein the first reference device and second reference device have different vertical locations.2. The positioning method of claim 1 , wherein the step of correcting the preliminary plane location comprises looking up the tilt angle in a lookup table to obtain the error in the preliminary plane location.3. The positioning method of claim 1 , wherein the step of obtaining the tilt angle comprises:obtaining, by an image sensor on the electronic device, an image of the mobile device; anddetermining the tilt angle of the mobile device by processing the image of the mobile ...

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Номер записи: 49
27-03-2014 дата публикации

Liquid Capacitive Micro Inclinometer

Номер: US20140082953A1
Автор: Chen Bo-Ting, Chen Cheng-Szu, Chen Jung-Hsiang
Принадлежит: Sagatek Co., Ltd.

The present invention relates to a liquid capacitive micro inclinometer, comprising a pair of differential electrodes and a common electrode, all formed in the same plane in a sealed chamber. Immersing liquid is filled in the sealed chamber. The shape of the differential electrodes forms a sector of a circular plane. The inclinometer may further integrate a reading circuit. The present invention also discloses preparation method for the invented inclinometer. 1. A liquid capacitive micro inclinometer , comprising a pair of differential electrodes and a common electrode , all positioned in substantially a same plane in a sealed chamber , and immersing liquid filled in the sealed chamber , wherein each differential electrode has the shape of a part of a circular plane.2. The liquid capacitive micro inclinometer according to claim 1 , wherein the differential electrodes respectively have a semicircular shape.3. The liquid capacitive micro inclinometer according to claim 1 , wherein shape of the differential electrodes forms sector of a semicircular claim 1 , wherein the inclinometer further comprises one or more pair of differential electrodes formed in the same plane claim 1 , and wherein all differential electrodes have substantially a same shape.4. The liquid capacitive micro inclinometer according to claim 1 , further comprising a reading circuit to generate reading values of capacitance represented by each of the differential electrodes.5. The liquid capacitive micro inclinometer according to claim 2 , further comprising a reading circuit to generate reading values of capacitance represented by each of the differential electrodes.6. The liquid capacitive micro inclinometer according to claim 3 , further comprising a reading circuit to generate reading values of capacitance represented by each of the differential electrodes.7. The liquid capacitive micro inclinometer according to claim 1 , further comprising a lubrication layer provided in at least a partial ...

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Номер записи: 50
06-01-2022 дата публикации

Sensor apparatus

Номер: US20220003542A1
Автор: Ashley NAPIER, Chris Hamblin, Josh Kiff, Laura Moreira, Mathew Holloway, Shubham Wagh
Принадлежит: Q Bot Ltd

There is provided a portable sensor apparatus (10) for surveying within a room (30) of a building. The sensor apparatus (10) comprises: a sensor unit (12) for temporary insertion into a room (30), the sensor unit (12) being moveable in a scanning motion, and comprising a plurality of outwardly directed sensors (16, 20, 24) arranged to capture sensor data associated with an environment of the sensor apparatus (10) as the sensor unit is moved through the scanning motion. The plurality of sensors (16, 20, 24) comprises: a rangefinder sensor (16); a thermal imaging sensor (20); and a camera (24).

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Номер записи: 51
02-01-2020 дата публикации

METHODS FOR MONITORING THE OUTPUT PERFORMANCE OF STATE ESTIMATORS IN NAVIGATION SYSTEMS

Номер: US20200001886A1
Автор: Bageshwar Vibhor L., Dunik Jindrich, Kana Zdenek, Sotak Milos
Принадлежит: HONEYWELL INTERNATIONAL INC.

A system and methods for monitoring the integrity of navigation measurement information are disclosed. One method includes receiving a plurality of navigation measurement values, computing a first set and second set of estimates of the navigation measurement values, comparing the first set to the second set, and if the second set is statistically consistent with the first set, computing a plurality of sub-sets of the second set of estimates, computing a sub-solution for each sub-set of the second set of estimates, and computing an integrity value for each sub-solution. 1. A method for monitoring the integrity of navigation measurement information , comprising:receiving a plurality of navigation measurement values;computing a first set of estimates of the plurality of navigation measurement values utilizing a global filter or a local filter having an order O and a system model;computing a second set of estimates of the plurality of navigation measurement values utilizing a local filter having an order lower than O and the system model;comparing the first set of estimates to the second set of estimates;determining if the second set of estimates is statistically consistent with the first set of estimates; andif the second set of estimates is statistically consistent with the first set of estimates, computing a plurality of sub-sets of the second set of estimates of the plurality of navigation measurement values, computing a sub-solution for each sub-set of the second set of estimates of the plurality of navigation measurement values, and computing an integrity value for each sub-solution.2. The method of claim 1 , wherein the computing the first set of estimates comprises computing the first set of estimates utilizing an extended Kalman filter (EKF).3. The method of claim 1 , wherein the computing the first set of estimates comprises computing the first set of estimates utilizing a global or high-order filter (G/HF).4. The method of claim 1 , wherein the computing the ...

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Номер записи: 52
05-01-2017 дата публикации

Calibration Fixture For Range Finding Sensors On A Vehicle

Номер: US20170003141A1
Автор: Callanan Patrick, Friton Gerald E., Strege Timothy A., Voeller David A.
Принадлежит:

An apparatus and method for aligning, calibrating, or inspecting an onboard vehicle sensor having an external field of view by providing a calibration component on a support structure for positioning at a short calibration distance of said sensor. The calibration component is configured to appear to the sensor as if it was positioned at a predetermined linear calibration distance from the vehicle which is greater than the actual short calibration distance. 1. A calibration fixture for use in the alignment , calibration , or inspection of a sensor onboard a vehicle having an external field of view , comprising:a support structure for positioning at a short calibration distance from said vehicle within the field of view of said sensor; andat least one calibration component disposed on said support structure, said calibration component visible to said sensor onboard said vehicle and configured to appear to said sensor as if said at least one calibration component was positioned at a predetermined linear calibration distance from said vehicle which is greater than said short calibration distance.2. The calibration fixture of wherein said sensor onboard said vehicle is a signal-emitting range-finding sensor; andwherein said at least one calibration component includes at least one reflector establishing a non-linear signal pathway carried by said support structure, said non-linear signal pathway having a signal travel distance measured from a signal entry point to a signal exit point, said signal travel distance related to said predetermined linear calibration distance associated with said signal-emitting range-finding sensor.3. The calibration fixture of wherein said at least one calibration component establishing said non-linear signal pathway further includes a signal retro-reflector in spaced apart alignment with said entry point claim 2 , such that said signal entry point and said signal exit point are at the same location.4. The calibration fixture of wherein said ...

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Номер записи: 53
04-01-2018 дата публикации

METHOD FOR PERFORMING FUNCTION USING SENSOR DATA AND ELECTRONIC DEVICE FOR PROVIDING SAME

Номер: US20180003520A1
Автор: BAE Donghwan, CHO Jeongho, CHOI Kyonggon, CHUNG Dohyoung, Lee Cheoljun, OH Jiwoong, PARK JeongMin, Suh Jungwon
Принадлежит:

An electronic device and method utilizes an external sensor group to facilitate miniaturization the device and repair/replacement of external sensors. An interface connected to an external sensor package including at least one sensor. A processor that when the external sensor package is connected through the interface, determines from which group the external sensor package is included in among pre-configured groups and controls the performance of a function corresponding to the determined group. 1. An electronic device comprising:an interface that is communicatively coupled to an accessory including an external sensor package including at least one sensor; and identify whether the accessory including the external sensor package is communicatively coupled to the electronic device through the interface,', 'determine, if the accessory including the external sensor package is coupled to the electronic device, a type of the sensor included in the external sensor package,', 'determine, based on the determined the type of the sensor, and', 'control a performance of a function corresponding to the determined the type of the sensor., 'a processor configured to2. The electronic device of claim 1 , wherein the processor sequentially determines respective sensor types when multiple sensors are included in the recognized external sensor package.3. The electronic device of claim 2 , wherein claim 2 , when the processor sequentially determines the respective sensor types on the basis of at least one information value among a voltage information value sensed by the processor corresponding to the respective sensors and identification information values corresponding to the respective sensors.4. The electronic device of claim 1 , wherein the processor is configured to deactivate a function corresponding to the type of the sensor that includes the external sensor package on a basis of status information regarding the electronic device.5. The electronic device of claim 4 , wherein the ...

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Номер записи: 54
07-01-2021 дата публикации

IMU CALIBRATION

Номер: US20210003655A1
Автор: Mahfouz Mohamed R.
Принадлежит: TechMah Medical, LLC

A method of calibrating an inertial measurement unit, the method comprising: (a) collecting data from the inertial measurement unit while stationary as a first step; (b) collecting data from the inertial measurement unit while repositioning the inertial measurement unit around three orthogonal axes of the inertial measurement unit as a second step; (c) calibrating a plurality of gyroscopes using the data collected during the first step and the second step; (d) calibrating a plurality of magnetometers using the data collected during the first step and the second step; (e) calibrating a plurality of accelerometers using the data collected during the first step and the second step; (f) where calibrating the plurality of magnetometers includes extracting parameters for distortion detection and using the extracted parameters to determine if magnetic distortion is present within a local field of the inertial measurement unit. 122.-. (canceled)23. A method of calibrating at least two magnetometers of an inertial measurement unit , where the inertial measurement unit includes at least two accelerometers , the method comprising:presuming at least one of the following: (1) a vector angle and a vector length of the at least two magnetometers have approximately identical values; (2) each of a plurality of magnetometer vectors is approximately unity in magnitude; (3) an angle between a calibrated magnetometer vector and a calibrated accelerometer vector should not change; (4) a radius of the at least two magnetometers post calibration is approximately equal to one; and, (5) quaternions calculated using different ones of the at least two magnetometers are approximately equal;collecting data from the inertial measurement unit, while stationary as a first step;collecting data from the inertial measurement unit while repositioning the inertial measurement unit as a second step;calibrating the at least two magnetometers using the data collected during the first step and the second ...

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Номер записи: 55
03-01-2019 дата публикации

INTEGRATED SENSOR AND HOMOLOGOUS CALIBRATION STRUCTURE FOR RESONANT DEVICES

Номер: US20190003854A1
Автор: DOGIAMIS Georgios C., EID Feras, Oster Sasha, SOUNART Thomas L.
Принадлежит:

An apparatus is provided which comprises: a substrate; a sensor including a sensing element, wherein the sensor is integrated within the substrate; and a calibration structure integrated within the substrate, wherein the calibration structure is to exhibit one or more physical or chemical properties same as the sensor but without the sensing element. 1. An apparatus comprising:i. a substrate;ii. a sensor including a sensing element, wherein the sensor is integrated within the substrate; andiii. a calibration structure integrated within the substrate, wherein the calibration structure is to exhibit one or more properties same as the sensor but without the sensing element.2. The apparatus of claim 1 , wherein the sensor is to exhibit a first indication corresponding to a state of a first stimulus to which the apparatus is subjected.3. The apparatus of claim 2 , wherein the first indication is modulated by changes corresponding to a state of a second stimulus to which the apparatus is subjected.4. The apparatus of claim 3 , wherein the calibration structure is to exhibit a second indication corresponding to the state of the second stimulus to which the apparatus is subjected.5. The apparatus of comprises circuitry to receive:a. a first signal from the sensor, andb. a second signal from the calibration structure.6. The apparatus of claim 5 , wherein the circuitry is to compare the first signal from the sensor to the second signal from the calibration structure and to calibrate the first signal based on the second signal.7. The apparatus of claim 6 , wherein the circuitry is to be operable to cancel out the modulation by the at least one secondary stimulus of the first input signal claim 6 , and wherein the electronic circuit is to exhibit an output signal that corresponds to a demodulated first input signal from the sensor structure.8. The apparatus of claim 1 , further comprising at least one cavity formed within said substrate.9. The apparatus of claim 8 , wherein the ...

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Номер записи: 56
13-01-2022 дата публикации

INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND PROGRAM

Номер: US20220011137A1
Автор: KIMISHIMA Masato
Принадлежит: SONY CORPORATION

A temperature characteristic of an inertial sensor is simply acquired. An information processing apparatus includes: an inertia measuring unit (, IMU); an information processing unit () that performs arithmetic processing that is accompanied by a change in temperature according to a load during operation; a temperature detection unit () that detects temperature; a temperature control unit () that controls the temperature detected by the temperature detection unit by applying the load to the information processing unit to cause the information processing unit to operate; and a data acquisition unit () that acquires temperature characteristic data indicating a relationship between a correction value and the temperature, the correction value being used to correct a measurement value of the inertia measuring unit. 1. An information processing apparatus comprising:an inertia measuring unit;an information processing unit that performs arithmetic processing that is accompanied by a change in temperature according to a load during operation;a temperature detection unit that detects temperature;a temperature control unit that controls the temperature detected by the temperature detection unit by applying the load to the information processing unit to cause the information processing unit to operate; anda data acquisition unit that acquires temperature characteristic data indicating a relationship between a correction value and the temperature, the correction value being used to correct a measurement value of the inertia measuring unit.2. The information processing apparatus according to claim 1 , further comprising a correction processing unit that corrects the measurement value measured by the inertia measuring unit claim 1 , on a basis of the correction value obtained from the temperature detected by the temperature detection unit and the temperature characteristic data.3. The information processing apparatus according to claim 1 , further comprising a state determination ...

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Номер записи: 57
01-01-2015 дата публикации

Detecting Mount Angle of Mobile Device in Vehicle Using Motion Sensors

Номер: US20150006099A1
Автор: Chow Sunny Kai Pang, Menzel Martin M., Pham Hung A., Tu Xiaoyuan
Принадлежит:

Motion sensors of a mobile device mounted to a vehicle are used to detect a mount angle of the mobile device. The motion sensors are used to determine whether the vehicle is accelerating or de-accelerating, whether the vehicle is turning and whether the mount angle of the mobile device is rotating. The mount angle of the mobile device is obtained from data output from the motion sensors and can be used to correct a compass heading. Data from the motion sensors that are obtained while the vehicle is turning or the mobile device is rotating are not used to obtain the mount angle. 1. A method comprising:obtaining motion data from a motion sensor of a mobile device mounted to a vehicle, where the motion data is obtained while the vehicle is moving;obtaining a subset of the motion data obtained while the vehicle was not turning and the mobile device was not rotating;obtaining a motion vector from the subset of motion data; andobtaining a mounting angle from the motion vector, where the method is performed by one or more hardware processors.2. The method of claim 1 , further comprising:determining from the motion data that the mobile device is mounted in the vehicle.3. The method of claim 2 , where determining that a mobile device is mounted in a vehicle claim 2 , comprises:determining that the mobile device is in a mounted state.4. The method of claim 1 , where obtaining a subset of motion data comprises:obtaining peak acceleration data obtained from a first motion sensor of the mobile device;comparing the peak acceleration data with angular rate data obtained from a second motion sensor; andobtaining the subset of motion data according to results of the comparing.5. The method of claim 1 , where obtaining a motion vector from the subset of motion data further comprises:obtaining the motion vector from a locus of acceleration data points obtained over a period of time while the vehicle was moving.6. The method of claim 4 , where the motion vector is obtained from the ...

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Номер записи: 58
20-01-2022 дата публикации

FAULT DETECTION, CONTAINMENT, ISOLATION, AND RESPONSE ARCHITECTURE FOR A POSITION, NAVIGATION, AND TIMING (PNT) SYSTEM

Номер: US20220018681A1
Автор: Li Rongsheng
Принадлежит:

A PNT system for a user includes a plurality of sensors configured to collect measurements, where the sensors are grouped into a plurality of subsets of sensors. The PNT system individually compares a measured value collected by each of the plurality of sensors with a corresponding threshold value. The PNT system determines a potential fault condition for a particular sensor exists when the measured value exceeds the corresponding threshold value. In response to detecting the potential fault condition, the PNT system contains the potential fault condition by determining a replacement value. In response to determining a number of times that the potential fault condition is detected exceeds a predetermined value, the PNT system determines a confirmed fault condition with the particular sensor and re-groups the plurality of subsets of sensors. The PNT system proceeds to a second level of fault detection for determining a plurality of individual navigation solutions. 1. A position , navigation , and timing (PNT) system for a user , comprising:a plurality of sensors configured to collect measurements related to the user, wherein the plurality of sensors are grouped into a plurality of subsets of sensors;one or more processors in electronic communication with the plurality of sensors; and individually compare a measured value collected by each of the plurality of sensors with a corresponding threshold value, wherein the measured values are compared individually at a first level of fault detection;', 'determine a potential fault condition for a particular sensor exists when the measured value exceeds the corresponding threshold value;', 'in response to detecting the potential fault condition, containing the potential fault condition by determining a replacement value;', 'count a number of times that the potential fault condition is detected;', 'compare the number of times that the potential fault condition is detected with a predetermined value;', 'in response to ...

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Номер записи: 59
12-01-2017 дата публикации

INERTIAL MEASUREMENT UNIT FOR ELECTRONIC DEVICES

Номер: US20170010126A1
Автор: Andiappan Rajasekaran, Ding Ke, Han Ke, HU Yong, Li Liang
Принадлежит: Intel Corporation

In one example an inertial measurement unit comprises an autocalibration module to compute a covariance matrix from data received from a plurality of sensors, an adaptive weight control module to determine state-based feedback parameters for the gyroscope sensor, accelerometer sensor, and magnetometer sensor, and a sensor characteristic adjustment module to determine a modified covariance matrix based on an input from the adaptive weight control module. Other examples may be described. 1. An inertial measurement unit , comprising:an autocalibration module to compute a covariance matrix from data received from a plurality of sensors;an adaptive weight control module to determine state-based feedback parameters for the gyroscope sensor, accelerometer sensor, and magnetometer sensor; anda sensor characteristic adjustment module to determine a modified covariance matrix based on an input from the adaptive weight control module.2. The inertial measurement unit of claim 1 , wherein the plurality of sensors comrprises at least one of a gyroscope sensor claim 1 , an accelerometer sensor claim 1 , and a magnetometer sensor.3. The inertial measurement unit of claim 1 , further comprising:a prediction module; anda correction module.4. The inertial measurement unit of claim 3 , wherein the modified covariance matrix is input to the correction module.5. The inertial measurement unit of claim 2 , wherein the autocalibration module comprises logic claim 2 , at least partially including hardware logic claim 2 , configured to:monitor an output of the accelerometer sensor; andin response to a determination that the inertial measurement unit remained still for a predetermined period of time, to compute the covariance matrix.6. The inertial measurement unit of claim 2 , wherein the autocalibration module comprises logic claim 2 , at least partially including hardware logic claim 2 , configured to:determine a state based on an input from the accelerometer sensor and the magnetometer ...

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Номер записи: 60
12-01-2017 дата публикации

OPTOELECTRONIC MEASURING DEVICE AND METHOD FOR DISTURBANCE DETECTION

Номер: US20170010127A1
Автор: ANNEN Ivo, SCHILLER Marzell
Принадлежит:

The invention relates to a method () for monitoring the accuracy of the azimuthal orientation of a handheld optoelectronic measuring device to be determined () by means of an electronic magnetic compass, including an automatic ascertainment () of an estimated accuracy value by the measuring device based on measured data of the magnetic compass, characterized by a safety check (), within the scope of which a probability that the estimated accuracy value meets a previously determined () accuracy criterion is automatically ascertained () by the measuring device, and the ascertained probability is provided () to a user as a return value. The invention also relates to a handheld optoelectronic measuring device including an electronic magnetic compass for carrying out the method according to the invention. 1. A method for monitoring the accuracy of the azimuthal orientation (a) of a handheld optoelectronic measuring device to be determined by means of an electronic magnetic compass , including an automatic ascertainment of an estimated accuracy value by the measuring device based on measured data of the magnetic compass ,further comprising:a safety check, within the scope of whicha probability that the estimated accuracy value meets a previously determined accuracy criterion is automatically ascertained by the measuring device, andthe ascertained probability is provided to a user as a return value.3. The method according to claim 1 ,wherein,an automatic check is carried out by the measuring device within the scope of the safety check of whether the probability, that the estimated accuracy value meets a previously determined accuracy criterion, meets a previously determined probability criterion, whereinif the probability criterion is met, the measuring device automatically provides a signal to an external receiver which includes at least information about the azimuthal orientation (a), andif the probability criterion is not met, the measuring device automatically outputs ...

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Номер записи: 61
12-01-2017 дата публикации

Decomposition of Error Components Between Angular, Forward, and Sideways Errors in Estimated Positions of a Computing Device

Номер: US20170010128A1
Автор: Le Grand Etienne, Williams Brian Patrick
Принадлежит:

Examples include systems and methods for decomposition of error components between angular, forward, and sideways errors in estimated positions of a computing device. One method includes determining an estimation of a current position of the computing device based on a previous position of the computing device, an estimated speed over an elapsed time, and a direction of travel of the computing device, determining a forward, sideways, and orientation change error component of the estimation of the current position of the computing device, determining a weight to apply to the forward, sideways, and orientation change error components based on average observed movement of the computing device, and using the weighted forward, sideways, and orientation change error components as constraints for determination of an updated estimation of the current position of the computing device. 1. A method performed by one or more processors executing instructions stored in memory , comprising:determining an estimation of a current position of a computing device;determining a forward error component of the estimation of the current position of the computing device, wherein the forward error component is indicative of error in the estimation of the current position along a forward direction of travel of the computing device;determining a sideways error component of the estimation of the current position of the computing device, wherein the sideways error component is indicative of error in the estimation of the current position along a sideways direction that is substantially perpendicular to the direction of travel of the computing device;determining a weight to apply to the forward error component and determining a weight to apply to the sideways error component, in each case based on average observed movement of the computing device; andusing the weighted forward error component and the weighted sideways error component as constraints for determination of an updated estimation of ...

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Номер записи: 62
14-01-2016 дата публикации

PORTABLE TERMINAL DEVICE, RECORDING MEDIUM, AND CORRECTION METHOD

Номер: US20160011004A1
Автор: Matsumoto Mahito
Принадлежит: MegaChips Corporation

A portable terminal device carried by a user is provided with: a gyro sensor measuring an angular velocity to acquire angular velocity information; an acceleration sensor measuring an acceleration to acquire acceleration information; a camera capturing an image of a subject in surroundings to acquire image information; a vector calculation unit calculating a motion vector of the subject based on the image information; a correlation decision unit deciding a relative relation between a traveling direction by a walking motion of the user and an image-capturing direction of the camera in accordance with the angular velocity information and the acceleration information; a rectilinear walking decision unit deciding whether the user is in a rectilinear state in accordance with the calculated motion vector of the subject and correlation decision information; and a correction unit correcting the angular velocity information acquired by the gyro sensor in response to decision that the user is in the rectilinear state. 1. A portable terminal device carried by a user comprising:a gyro sensor configured to measure an angular velocity in movement of the portable terminal device to acquire angular velocity information;an acceleration sensor configured to measure an acceleration in the movement of the portable terminal device to acquire acceleration information;a camera configured to capture an image of a subject in surroundings during a time period in which the portable terminal device is moving, to acquire image information;a vector calculation element configured to calculate a motion vector of the subject based on the image information;a correlation decision element configured to decide a relative relation between a traveling direction by a walking motion of the user and an image-capturing direction of the camera in accordance with the angular velocity information acquired by the gyro sensor and the acceleration information acquired by the acceleration sensor;a rectilinear ...

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Номер записи: 63
11-01-2018 дата публикации

Precision calibration method of attitude measuring system

Номер: US20180010923A1
Автор: Qiang YUE, Rui Tu, Wending DAI, Wenlong ZHAO, Xuefeng SHEN
Принадлежит: SHANGHAI HUACE NAVIGATION TECHNOLOGY LTD

A precision calibration method of attitude measuring systems is provided. The precision calibration method of attitude measuring systems includes the following steps: calibrating a zero-deviation, a scale coefficient, and a non-orthogonal angle between axes of an accelerometer to the attitude measuring system via an ellipsoid fitting model (S 1 ); compensating original data of the accelerometer using a calculated ellipsoid parameter (S 2 ); calibrating an electronic compass via the ellipsoid fitting model according to compensated accelerometer data (S 3 ); compensating original electronic compass data by the calculated ellipsoid parameter (S 4 ); calculating an attitude according to the compensated data of the accelerometer and compensated data of the electronic compass (S 5 ). The above steps of the method have a reliable calibration result and a high precision with a less time consumption of calibration.

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Номер записи: 64
14-01-2016 дата публикации

Gnss and optical guidance and machine control

Номер: US20160011597A1
Автор: Andrè C. Roberge, John A. McClure, Keith R. Jones, Mark R. Webber, Michael L. Whitehead, Walter J. Feller
Принадлежит: AgJunction LLC

A global navigation satellite sensor system (GNSS) and gyroscope control system for vehicle steering control comprising a GNSS receiver and antennas at a fixed spacing to determine a vehicle position, velocity and at least one of a heading angle, a pitch angle and a roll angle based on carrier phase position differences. The system also includes a control system configured to receive the vehicle position, heading, and at least one of roll and pitch, and configured to generate a steering command to a vehicle steering system. The system includes gyroscopes for determining system attitude change with respect to multiple axes for integrating with GNSS-derived positioning information to determine vehicle position, velocity, rate-of-turn, attitude and other operating characteristics. Relative orientations and attitudes between motive and working components can be determined using optical sensors and cameras. The system can also be used to guide multiple vehicles in relation to each other.

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Номер записи: 65
10-01-2019 дата публикации

Pendulum-based laser leveling device with calibration guard function

Номер: US20190011246A1
Автор: Hung-Ying Yuen, Louis Chan, Thomas Kohlert
Принадлежит: ROBERT BOSCH GMBH

A pendulum-based laser leveling device comprises a micro controller unit connected to a shock sensor for sensing a shock experienced by the laser leveling device. The micro controller unit is configured to send out a warning message when the magnitude of the shock sensed by the shock sensor exceeds a shock threshold.

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Номер записи: 66
10-01-2019 дата публикации

NAVIGATION DEVICE WITH TURNTABLE FOR INDEX MEASURING AND METHOD FOR OPERATING THE NAVIGATION DEVICE

Номер: US20190011264A1
Автор: DECK Matthias, HERBERTH Uwe, PROBST Uwe
Принадлежит: NORTHROP GRUMMAN LITEF GMBH

The invention relates to a navigation device comprising a turntable which can be rotated about an axis in at least two different rotary positions, in accordance with a rotary control signal. An inertial measuring unit is arranged on the rotary table which can be rotated with the rotary table. The quality of the measurement data can be determined by the initial measuring unit with the help of an evaluation device. When the determined quality does not reach a predetermined minimum quality, the rotary table rotates in the respective other rotary position. 1. A navigation device comprisinga turntable that can be rotated depending on a rotary control signal around an axis into at least two different rotary positions;an inertial measuring unit that is arranged on the turntable and can be rotated together with the turntable; andan evaluation unit for evaluating of measurement data of the inertial measuring unit; whereinby the evaluation unit the quality of the measurement data can be detected; and whereinby the evaluation unit a rotary control signal can be generated, if the determined quality does not reach a predetermined minimum quality, such that then the turntable is rotated to the respective other rotary position.2. The navigation device according to claim 1 , wherein the evaluation unit comprises a Kalman filter.3. The navigation device according to claim 1 , wherein the rotary positions are offset with respect to each other by an arbitrary angle claim 1 , in particular by 180 degree.4. The navigation device according to claim 1 , wherein the quality of the measurement data can be determined based on the variance of the measurement data.5. The navigation device according to claim 1 , wherein the minimum qualityis a predefined, fixed threshold; oris a dynamic threshold that can be changed by the evaluation unit depending on further conditions.6. The navigation device according to claim 1 , wherein the inertial measuring unit is configured to determining a heading.7. ...

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Номер записи: 67
14-01-2021 дата публикации

METHOD FOR DECOUPLING ANGULAR VELOCITY IN TRANSFER ALIGNMENT PROCESS UNDER DYNAMIC DEFORMATION

Номер: US20210010812A1
Автор: CHEN Xiyuan, FANG Lin, WANG Junwei, Yang Ping
Принадлежит: SOUTHEAST UNIVERSITY

A method for decoupling an angular velocity in a transfer alignment process under a dynamic deformation includes: (1) generating, by a trajectory generator, information about an attitude, a velocity, and a position of a main inertial navigation system and an output of an inertial device, and simulating a bending deformation angle {right arrow over (θ)} between the main inertial navigation system and a slave inertial navigation system and a bending deformation angular velocity {right arrow over (ω)} by using second-order Markov; (2) decomposing the dynamic deformation into a vibration deformation and a bending deformation, and establishing an angular velocity model under the dynamic deformation of a wing; (3) deducing an error angle Δ{right arrow over (ϕ)} between the main inertial navigation system and the slave inertial navigation system; and (4) deducing an expression Δ{right arrow over (ω)} of a coupling error angular velocity, and applying that to an angular velocity matching process of transfer alignment to improve the precision of the transfer alignment. 1. A method for decoupling an angular velocity in a transfer alignment process under a dynamic deformation , comprising:{'sub': 'θ', 'step (1): generating, by a trajectory generator, information about an attitude, a velocity, and a position of a main inertial navigation system and an output of an inertial device, and simulating a bending deformation angle {right arrow over (θ)} between the main inertial navigation system and a slave inertial navigation system and a bending deformation angular velocity {right arrow over (ω)} by using second-order Markov;'}step (2): decomposing the dynamic deformation into a vibration deformation with a high frequency and a low amplitude, and a bending deformation with a low frequency and a high amplitude, and establishing an angular velocity model under the dynamic deformation of a wing;step (3): considering the vibration deformation with the high frequency and the low ...

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Номер записи: 68
09-01-2020 дата публикации

Motion Sensor with Drift Correction

Номер: US20200011669A1
Автор: Seth Rohit
Принадлежит:

Systems and/or devices for implementing a tracking device for tracking a position/location and orientation of an object are provided herein. The device comprises one or more sides that define a predetermined shape, and a plurality of inertial measurement units (IMU) mounted to the one or more sides of the predetermined shape. Each IMU is configured to detect movement of the object and generate inertial output data representing a position and/or orientation of the object. Each IMU includes a first sub-sensor and a second sub-sensor. Each IMU is positioned at a predetermined distance and orientation relative to a center point of the tracking device. The device also comprises a controller communicatively coupled to the plurality of IMUs, the controller configured to receive output data from each of the plurality of IMUs, and determine position/location and orientation of the object based on the received output data from the plurality of IMUs and known data points for the predetermined shape to eliminate drift from sensor data. 1. A tracking device for tracking a location and orientation of an object , the tracking device comprising:one or more sides that define a predetermined shape;a plurality of inertial measurement units (IMU) mounted to the one or more sides of the predetermined shape, wherein each IMU is configured to detect movement of the object and generate inertial output data representing the location and/or orientation of the object, wherein each IMU includes a first sub-sensor and a second sub-sensor, wherein each IMU is positioned at a predetermined distance and orientation relative to a center of mass of the tracking device; receiving first sub-sensor inertial output data and second sub-sensor inertial output data from each of the plurality of IMUs at a high sampling rate;', generating calibrated inertial output data based on the first sub-sensor inertial output data and the second sub-sensor inertial output data;', 'cross-correlating the first sub-sensor ...

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Номер записи: 69
09-01-2020 дата публикации

SYSTEMS AND METHODS FOR MATERIALS HANDLING VEHICLE ODOMETRY CALIBRATION

Номер: US20200011674A1
Автор: Estep Ryan Michaels, Fanselow Timothy William, Thode Justin Forbes
Принадлежит: Crown Equipment Corporation

Systems and methods for calibrating odometry of a materials handling vehicle. One embodiment of a method includes determining a current location of the materials handling vehicle, determining an odometry distance from the current location to a destination based on a calculation of a determined number of rotations of a wheel and a circumference of the wheel, and determining a positioning system distance from the current location to the destination. Some embodiments include comparing the odometry distance with data from the positioning system distance to calculate a scaling factor, applying the scaling factor to a fast alpha filter to achieve a fast filter result, and applying the scaling factor to a slow alpha filter to achieve a slow filter result. Similarly, some embodiments include applying the fast alpha filter to the scaling factor to smooth noise, calculating an updated odometry distance utilizing the scaling factor, and utilizing the updated odometry distance. 1. A materials handling vehicle comprising materials handling hardware , a wheel , an odometer , a positioning system , and a vehicle computing device , wherein the vehicle computing device stores logic that when executed by a processor , causes the materials handling vehicle to perform at least the following:determine a current location of the materials handling vehicle;determine, via the odometer, an odometry distance from the current location to a destination;determine, via the positioning system, a positioning system distance from the current location of the materials handling vehicle to the destination;compare the odometry distance with the positioning system distance to determine a difference and to calculate a scaling factor based on the odometry distance and the positioning system distance;utilize an exponential moving average filter to adjust the scaling factor when the difference exceeds a threshold;calculate an updated odometry distance utilizing the adjusted scaling factor; andutilize the ...

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Номер записи: 70
09-01-2020 дата публикации

METHODS AND SYSTEMS FOR SELF-TESTING MEMS INERTIAL SENSORS

Номер: US20200011702A1
Автор: Clark William A.
Принадлежит: ANALOG DEVICES, INC.

Techniques for self-testing of microelectromechanical systems (MEMS) inertial sensors are described. Some techniques involve testing inertial sensor characteristics such as an accelerometer's sensitivity to acceleration and a gyroscope's sensitivity to angular motion. The tests may be performed by providing a test signal, which simulates a stimulus such as an acceleration or angular rate, to a MEMS inertial sensor and examining the sensor's output. The efficacy of such self-tests may be impaired by spurious signals, which may be present in the sensor's environment and may influence the sensor's output. Accordingly, the self-testing techniques described herein involve detecting the presence of any such spurious signals and discarding self-test results when their presence is detected. In some embodiments, the presence of spurious signals may be detected using a signal obtained by mixing the response of the MEMS inertial sensor with a reference signal substantially in quadrature with the test signal. 1. A system for testing a microelectromechanical system (MEMS) inertial sensor , the system comprising: receive a response signal representing a response of the MEMS inertial sensor to a test signal generated by a signal generator;', 'generate an in-phase response signal by mixing an in-phase reference signal with the response signal;', 'generate a quadrature response signal by mixing the response signal with a quadrature reference signal;', 'determine, based on the quadrature response signal, whether the in-phase response signal is to be used for assessing a characteristic of the MEMS inertial sensor; and', 'when it is determined that the in-phase response signal is to be used for assessing the characteristic of the MEMS inertial sensor, assess the characteristic of the MEMS inertial sensor using the in-phase response signal., 'test circuitry configured to2. The system of claim 1 , wherein the in-phase reference signal and the test signal are substantially in-phase ...

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Номер записи: 71
09-01-2020 дата публикации

System for Calibration and Inspection of Range Finding Sensors On A Vehicle

Номер: US20200011703A1
Автор: Callanan Patrick, Friton Gerald E., Strege Timothy A., Voeller David A.
Принадлежит:

An apparatus and method for aligning, calibrating, or inspecting an onboard vehicle sensor having an external field of view by providing a calibration component on a support structure for positioning at a short calibration distance from the vehicle and which is within the field of view of said sensor. The calibration component is configured to appear to the sensor as if it was positioned at a predetermined linear calibration distance from the vehicle which is greater than the actual short calibration distance. 1. A multi-function calibration fixture for use in the alignment , calibration , or inspection of a plurality of vehicle onboard sensors having external fields of view , including at least one optical sensor unit and at least one radar sensor unit , comprising:a support structure for positioning at a first calibration distance from said vehicle within the fields of view of said vehicle onboard sensors;a plurality of calibration components disposed on said support structure, said plurality of calibration components each visible to at least one of said plurality of vehicle onboard sensors and configured to appear to said at least one vehicle onboard sensor as if said visible calibration component was positioned at a predetermined linear calibration distance from said vehicle which is greater than said first calibration distance;wherein at least one of said plurality of calibration components is an optical calibration component visible to said at least one optical sensor unit; andwherein at least one of said plurality of calibration components is a radar target component configured to transform an emitted radar signal from said radar sensor unit into a return signal by conveyance along a non-linear signal pathway from a signal entry to a signal exit, said non-linear signal pathway comprising only passive elements altering a travel direction of said emitted signal such that said return signal appears to said radar sensor unit as if said radar target component is ...

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Номер записи: 72
03-02-2022 дата публикации

MEMS GYROSCOPE CONTROL CIRCUIT

Номер: US20220034659A1
Автор: ALWARDI Milad, FANG Deyou, Hu Yamu, McClure David, TSAI Chao-Ming
Принадлежит: STMicroelectronics, Inc.

A microelectromechanical system (MEMS) gyroscope includes a driving mass and a driving circuit that operates to drive the driving mass in a mechanical oscillation at a resonant drive frequency. An oscillator generates a system clock that is independent of and asynchronous to the resonant drive frequency. A clock generator circuit outputs a first clock and a second clock that are derived from the system clock. The drive loop of the driving circuit including an analog-to-digital converter (ADC) circuit that is clocked by the first clock and a digital signal processing (DSP) circuit that is clocked by the second clock. 1. A control circuit for driving a driving mass of a microelectromechanical system (MEMS) gyroscope in a mechanical oscillation at a resonant drive frequency , comprising:an analog sensing circuit configured to sense the mechanical oscillation;a digital circuit clocked by a digital clock signal and configured to process output from the analog sensing circuit and generate a drive signal for application to cause movement of the driving mass;an oscillator configured to generate a system clock independent of and asynchronous to the resonant drive frequency; anda clock generator circuit configured to generate the digital clock signal from the system clock.2. The control circuit of claim 1 , wherein the digital circuit is an analog-to-digital converter (ADC) circuit.3. The control circuit of claim 1 , wherein the digital circuit is a digital signal processor (DSP) circuit.4. The control circuit of claim 1 , wherein the analog sensing circuit comprises:an analog front end circuit configured to generate an analog sinusoid signal having a frequency corresponding to a frequency of the mechanical oscillation of the driving mass and an amplitude corresponding to an amplitude of the mechanical oscillation of the driving mass; andan analog signal processing circuit configured to generate an oscillation clock signal from the analog sinusoid signal and demodulate the ...

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Номер записи: 73
03-02-2022 дата публикации

INDOOR/OUTDOOR DETECTION USING WIRELESS SIGNALS

Номер: US20220035001A1
Автор: Chhokra Kumar Gaurav, Jadidian Jouya, LIU Shun, Pathak Vaneet, Patole Sujeet Milind, Shirahatti Harsha, Tsiklauri Mikheil, Wang Lei
Принадлежит:

An electronic device may utilize various methods or systems to determine whether the electronic device is indoors or outdoors. The electronic device transmits wireless signals (e.g., radio detection and ranging (RADAR) signals). The electronic device receives reflections of the wireless signals. Using these received reflections of the wireless signals, the electronic device determines whether a power amplitude of the reflections is greater than or equal to a threshold value. In response to a determination that the power amplitude is not greater than or equal to the threshold value, the electronic device operates in an outdoor mode or an indoor mode. 1. A method , comprising:transmitting wireless signals from an electronic device;receiving reflections of the wireless signals at the electronic device;determining whether a power amplitude of the reflections is greater than or equal to a threshold value; andin response to a determination that the power amplitude is not greater than or equal to the threshold value, operating the electronic device in an outdoor mode.2. The method of claim 1 , wherein transmitting the wireless signals comprises transmitting the wireless signals in an upward direction from the electronic device.3. The method of claim 2 , wherein the wireless signals comprise radio detection and ranging signals.4. The method of claim 2 , comprising detecting an orientation of the electronic device to determine which direction is the upward direction.5. The method of claim 1 , wherein transmitting the wireless signals from the electronic device comprises broadcasting from multiple directions using multiple transmitters located at multiple locations in or on the electronic device.6. The method of claim 1 , wherein the outdoor mode comprises:initiating calibration of a barometer of the electronic device; ordetecting an altitude of the electronic device using outdoor settings and the barometer.7. The method of claim 1 , wherein the outdoor mode comprises ...

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Номер записи: 74
19-01-2017 дата публикации

METHOD OF FABRICATING MICRO-GLASSBLOWN GYROSCOPES

Номер: US20170016742A1
Автор: Ahamed Mohammed, Senkal Doruk, Shkel Andrei M.
Принадлежит: The Regents of the University of California

A method of making a Coriolis vibratory gyroscope with a three dimensional mushroom resonator element includes defining a cavity in a substrate wafer; bonding a cap wafer onto the substrate over the cavity from which cap wafer the resonator element will be formed; heating the substrate and cap wafer to generate a pressure build-up within the cavity; plastically deforming the cap wafer by the pressure build-up to form the mushroom resonator element having a perimeter around the mushroom resonator element; releasing the three dimensional mushroom resonator element at the perimeter by selectively removing material so that the perimeter of mushroom resonator element is free to vibrate; and disposing a layer of conductive material on the mushroom resonator element to form electrodes thereon for use in driving and sensing vibrations of the mushroom resonator element and its perimeter. A microgyroscope made by such a method is also included within the embodiments. 1. A method of making a Coriolis vibratory gyroscope with a three dimensional mushroom resonator element comprising:defining a cavity in a substrate wafer;bonding a cap wafer onto the substrate over the cavity from which cap wafer the mushroom resonator element will be formed;heating the substrate and cap wafer to generate a pressure build-up within the cavity;plastically deforming the cap wafer by the pressure build-up to form the mushroom resonator element having a perimeter around the mushroom resonator element;releasing the three dimensional mushroom resonator element at the perimeter by selectively removing material so that the perimeter of mushroom resonator element is free to vibrate; anddisposing a layer of conductive material on the mushroom resonator element to form electrodes thereon for use in driving and sensing vibrations of the mushroom resonator element and its perimeter.2. The method of where releasing the three dimensional mushroom resonator element comprises etching a circular trench into the ...

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Номер записи: 75
19-01-2017 дата публикации

CALIBRATION DEVICE AND CALIBRATION METHOD FOR A LASER BEAM HORIZONTAL TRUENESS TESTING DEVICE

Номер: US20170016743A1
Автор: BRODER Katherine, Dumoulin Charles Leopold Elisabeth
Принадлежит: LEICA GEOSYSTEMS AG

Calibration device and calibration method for calibration of a laser beam horizontal trueness testing device whereby the calibration device comprises an elongated support body for support of an elongated laser housing with a longitudinal axis and a laser source, whereby a laser beam is emittable in a direction of the longitudinal axis. According to the calibration method, calibration parameters are determined based on at least three impinging positions of the laser beam of the laser housing for at least two different rotational positions of the laser housing in a first face and at least one position of the laser housing in a second opposing face. 2. The calibration device as claimed in claim 1 , wherein: are made of high-speed steel, glass or ceramics, and/or', 'are single piece units and/or', {'sup': −6', '−1, 'are made of a material with a coefficient of thermal expansion in the range of 0 to 9·10K,'}], 'the laser housing and/or the support body are precision ground, smooth and surface hardened, wherein the laser housing and/or the support bodyand/or both ends of the laser housing are enclosed by a sleeve each, whereby the sleeves are precision ground, smooth and surface hardened, wherein each sleeve is designed as the race of a bearing or as a fixed ball bearing.3. The calibration as claimed in claim 1 , wherein:the points of support form lines parallel to the inserted direction whereforethe support body is designed as a block with a v-shaped support array and the laser housing is designed as a straight cylinder orthe support body is designed as a u-shaped support array or as two bars parallel to each other and to the inserted direction, and the laser housing is designed as a straight cylinder or a straight prism,and/or the points of support are designed as single points spaced to each other wherefore the support body comprises single spheres providing the points of support.4. The calibration device as claimed in claim 1 , wherein:the laser source is designed as ...

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Номер записи: 76
21-01-2016 дата публикации

METHOD FOR CALIBRATING VIBRATORY GYROSCOPE

Номер: US20160018243A1
Автор: BEITIA JOSE, OKON ISAAK MARKOVICH, RENAULT ALAIN
Принадлежит:

The present invention is concerned with a method of calibrating a vibrating gyroscope. The method comprises exciting a vibration along an excitation axis of a resonant structure wherein the excitation axis is positioned at a first angular position, sensing the vibration of the resonant structure on a first sensing axis of the resonant structure while the excitation axis is positioned at the first angular position, generating a first sensing signal indicative of the sensed vibration of the resonant structure on the first sensing axis, rotating the excitation axis in a continuous manner around the resonant structure to a second angular position, sensing the vibration of the resonant structure on a second sensing axis of the resonant structure while the excitation axis is positioned at the second angular position, generating a second sensing signal indicative of the sensed vibration of the resonant structure on the second sensing axis and adding the first sensing signal to the second sensing signal in order to derive a bias of the gyroscope.

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Номер записи: 77
18-01-2018 дата публикации

MULTIPLE SENSOR INTEGRATION

Номер: US20180017389A1
Автор: Faulkner Nicholas Mark, Sheard John Keith
Принадлежит: Atlantic Inertial Systems Limited

A method of compensating for signal error is described, comprising: receiving a first signal from a first sensor, said first signal indicative of a movement characteristic; applying an error compensation to said first signal to produce an output signal; applying a variable gain factor to said error compensation; receiving a second signal from a second sensor indicative of said movement characteristic; wherein said error compensation is calculated using the difference between said output signal and said second signal, and said variable gain factor is calculated using said first signal. 1. A method of compensating for sensor signal error , comprising:receiving a first signal from a first sensor, said first signal indicative of a movement characteristic;applying an error compensation to said first signal to produce an output signal;applying a variable gain factor to said error compensation;receiving a second signal from a second sensor indicative of said movement characteristic;wherein said error compensation is calculated using the difference between said output signal and said second signal, and said variable gain factor is calculated using said first signal.2. The method as claimed in claim 1 , wherein said first signal and said second signal are each from a gyroscope or accelerometer claim 1 , and said movement characteristic is angular rate.3. The method as claimed in claim 1 , wherein said first sensor is a different type of sensor claim 1 , or has different characteristics than said second sensor.4. The method as claimed in claim 1 , wherein said first sensor exhibits a lower high frequency noise than said second sensor.5. The method as claimed in claim 1 , wherein said second sensor exhibits better bias claim 1 , scale factor or long-term stability.6. The method as claimed in claim 1 , wherein said gain factor is varied as a function of one or more operating conditions corresponding to said movement characteristic.7. The method as claimed in claim 6 , wherein ...

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Номер записи: 78
21-01-2016 дата публикации

PHYSICAL ORIENTATION CALIBRATION FOR MOTION AND GESTURE-BASED INTERACTION SEQUENCE ACTIVATION

Номер: US20160018908A1
Автор: Forsblom Nils
Принадлежит:

The presentation of interaction sequences to a user on a mobile communications device is disclosed. A first external input corresponding to a triggering of an interaction sequence delivery is received on a first input modality. An overlay is displayed in a graphical user interface in response to receiving the external input. Interaction sequence invocation instructions are displayed within the overlay. A second external input is received on a second input modality different from the first input modality. The second external input is translated to a set of quantified values. An interaction sequence results content is then displayed within the overlay in response to a substantial match between the set of quantified values translated from the received second external input to the set of predefined values corresponding to the interaction sequence invocation instructions.

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Номер записи: 79
17-04-2014 дата публикации

ROTATION RATE SENSOR AND METHOD FOR CALIBRATING A ROTATION RATE SENSOR

Номер: US20140102168A1
Автор: Bennini Fouad, Claus Thomas, Kohn Oliver
Принадлежит:

A rotational rate sensor is provided having a substrate and a Coriolis element, the rotational rate sensor having a drive means for exciting the Coriolis element to a Coriolis oscillation, and the rotational rate sensor having a detection device for producing a sensor signal as a function of a deflection of the Coriolis element relative to the substrate on the basis of a Coriolis force acting on the Coriolis element, and in addition the rotational rate sensor being configured to carry out a self-calibration when a rotational acceleration signal produced as a function of the sensor signal falls below a specified threshold value. 111-. (canceled)12. A rotational rate sensor , comprising:a substrate;a Coriolis element;a driver to excite the Coriolis element to a Coriolis oscillation; anda detection device to produce a sensor signal as a function of a deflection of the Coriolis element relative to the substrate based on a Coriolis force acting on the Coriolis element;wherein the rotational rate sensor is configured to carry out a self-calibration when a rotational acceleration signal produced as a function of the sensor signal falls below a threshold value.13. The rotational rate sensor as recited in claim 12 , further comprising:a comparator to compare the rotational acceleration signal to the threshold value.14. The rotational rate sensor as recited in claim 12 , further comprising:at least one of: i) a difference value formation unit configured to produce the rotational acceleration signal from a difference between at least two sensor values of the sensor signal; and ii) a differentiator that is configured to produce the rotational acceleration signal from a mathematical derivative of the sensor signal.15. The rotational rate sensor as recited in claim 12 , further comprising:an intermediate storage device configured to store a multiplicity of sensor values of the sensor signal during execution of the self-calibration, the intermediate storage device being configured ...

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Номер записи: 80
19-01-2017 дата публикации

NINETY-DEGREE PHASE SHIFTER CIRCUIT AND CORRESPONDING NINETY-DEGREE PHASE-SHIFTING METHOD

Номер: US20170019087A1
Автор: Garbarino Marco, Guanziroli Federico, Modaffari Roberto, Nicollini Germano
Принадлежит:

A phase shifter, which carries out a ninety-degree phase shift of a sinusoidal input signal having an input frequency, at the same input frequency, envisages: a continuous-time all-pass filter stage, which receives the sinusoidal input signal and generates an output signal phase-shifted by 90° at a phase-shift frequency that is a function of a RC time constant of the all-pass filter stage; and a calibration stage, which is coupled to the all-pass filter stage and generates a calibration signal for the all-pass filter stage, such that the phase-shift frequency is equal to the input frequency of the sinusoidal input signal, irrespective of variations of the value of the input frequency and/or of the RC time constant with respect to a nominal value. 1. A phase-shifter circuit , comprising:a continuous-time all-pass filter stage configured to receive a sinusoidal input signal and generate an output signal phase-shifted by 90° at a phase-shift frequency that is a function of a RC time constant of said all-pass filter stage; anda calibration stage coupled to the all-pass filter stage and configured to generate a calibration signal for said all-pass filter stage such that the phase-shift frequency is substantially equal to an input frequency of the sinusoidal input signal.2. The circuit according to claim 1 , wherein said all-pass filter stage includes a variable capacitive element that determines said RC time constant claim 1 , wherein said calibration signal is configured to vary a value of capacitance of said variable capacitive element.3. The circuit according to claim 1 , said all-pass filter stage including:a fully differential operational amplifier having first and second differential input terminals, and first and second differential output terminals;a first gain resistor, the first differential input terminal being coupled to a first input terminal of said phase-shifter circuit via the first gain resistor;a first variable capacitor coupled in series with a first ...

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Номер записи: 81
16-01-2020 дата публикации

Measurement device and program

Номер: US20200018600A1
Автор: Hiromichi Nakamoto, Kazuyoshi KITAJIMA, Takeshi Korenaga, Tomokazu Shimoda
Принадлежит: Mitsubishi Heavy Industries Machinery Systems Co Ltd

This measurement device for measuring the angular velocity or acceleration of a two-wheel vehicle, is provided with a main detection unit which detects the three-axis angular velocity or three-axis acceleration, a support unit which can support the main detection unit on the body of the two-wheel vehicle, and a correction unit which cancels the lean of the body to the left and right in the main detection unit.

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Номер записи: 82
16-01-2020 дата публикации

METHOD AND TEST SYSTEM FOR SENSOR FUSION POSITIONING TESTING

Номер: US20200018617A1
Автор: CARDALDA-GARCIA Adrian, MAIER Stefan
Принадлежит:

A test system for testing the positioning functionality of a device under test (DUT) is provided. The test system includes a high precision global navigation satellite system (GNSS) simulator configured to simulate real-time kinematic (RTK) signals. The test system further includes a sensor simulator configured to simulate ideal sensor signals, and a sensor error model unit. The sensor error model unit is further configured to simulate sensor errors based on a real sensor datasheet. The simulated ideal sensor signals are combined with the simulated sensor errors to form real simulation signals. 1. A test system for testing the positioning functionality of a device under test (DUT) , comprising:a high precision global navigation satellite system (GNSS) simulator configured to simulate real-time kinematic (RTK) signals;a sensor simulator configured to simulate ideal sensor signals; anda sensor error model unit; andwherein the sensor error model unit is further configured to simulate sensor errors based on a real sensor datasheet, andwherein the simulated ideal sensor signals are combined with the simulated sensor errors to form real simulation signals.2. The test system according to claim 1 , wherein the ideal signals are of one or more of an inertial measurement unit (IMU) sensor claim 1 , a barometer sensor claim 1 , an odometer sensor and a magnetometer sensor.3. The test system according to claim 1 , wherein the simulated sensor errors include at least package to frame misalignment claim 1 , inter-axis misalignment claim 1 , sensitivity error claim 1 , bias and noise.4. The test system according to claim 1 , wherein one or more of the simulated ideal sensor signals and the real simulation signals are configured to be used by the DUT to perform positioning calculations.5. The test system according to claim 1 , wherein one or more of the simulated ideal sensor signals and the real simulation signals are configured to simulate a specific condition that triggers a ...

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Номер записи: 83
16-01-2020 дата публикации

SYSTEMS AND METHODS FOR ANNOTATING MAPS TO IMPROVE SENSOR CALIBRATION

Номер: US20200018618A1
Автор: Cohen Schuyler H., Ozog Paul J., Wolcott Ryan W.
Принадлежит:

System, methods, and other embodiments described herein relate to improving calibration of an onboard sensor of a vehicle. In one embodiment, a method includes, in response to acquiring sensor data from a surrounding environment of the vehicle using the onboard sensor, analyzing the sensor data to determine calibration parameters for the onboard sensor. The method includes identifying a suitability parameter that characterizes how well the surrounding environment provides for determining the calibration parameters. The method includes generating annotations within a map that specify at least the suitability parameter for a location associated with the sensor data. In further aspects, the method includes identifying, from the map, a calibration route for the vehicle that is a deviation from a current route in response to determining that the calibration state of the onboard sensor does not satisfy the calibration threshold. 1. A calibration system for improving calibration of an onboard sensor of a vehicle , comprising:one or more processors; a calibration module including instructions that when executed by the one or more processors cause the one or more processors to, in response to acquiring sensor data from a surrounding environment of the vehicle using the onboard sensor, analyze the sensor data to determine calibration parameters for the onboard sensor; and', 'an annotation module including instructions that when executed by the one or more processors cause the one or more processors to identify a suitability parameter that characterizes how well the surrounding environment provides for determining the calibration parameters, wherein the annotation module includes instructions to generate annotations within a map that specify at least the suitability parameter for a location associated with the sensor data., 'a memory communicably coupled to the one or more processors and storing2. The calibration system of claim 1 , wherein the annotation module includes ...

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Номер записи: 84
16-01-2020 дата публикации

NAVIGATION SYSTEM AND A VEHICLE INCLUDING THE NAVIGATION SYSTEM

Номер: US20200018619A1
Автор: Detloff Shaun, Gingrich James K.
Принадлежит:

A navigation system includes a Coriolis vibratory gyroscope, a voltage input supply, and a controller. The voltage input supply is configured to supply a first voltage input to the Coriolis vibratory gyroscope at a first bias voltage, and supply a second voltage input to the Coriolis vibratory gyroscope at a second bias voltage, the second bias voltage being different than the first bias voltage. The controller is configured to detect a difference in responses of the Coriolis vibratory gyroscope to the first bias voltage and the second bias voltage, and determine a gyro rate of the Coriolis vibratory gyroscope as a function of the difference in responses and a correction term. 1. A navigation system comprising:a Coriolis vibratory gyroscope;a voltage input supply configured tosupply a first voltage input to the Coriolis vibratory gyroscope at a first bias voltage, andsupply a second voltage input to the Coriolis vibratory gyroscope at a second bias voltage, the second bias voltage being different than the first bias voltage; anda controller configured to detect a difference in responses of the Coriolis vibratory gyroscope to the first bias voltage and the second bias voltage, and determine a gyro rate of the Coriolis vibratory gyroscope as a function of the difference in responses and a correction term.2. The navigation system of claim 1 , wherein the Coriolis vibratory gyroscope outputs a first response in response to the first bias voltage and a second response in response to the second bias voltage and the correction term represents a sum of the time dependent instrument bias in the first response and the second response.3. The navigation system of claim 1 , wherein the controller is configured to determine the gyro rate of the Coriolis vibratory gyroscope independent of a scale factor of the Coriolis vibratory gyroscope.4. The navigation system of claim 1 , wherein the correction term is a predetermined constant value based on an initial voltage output and ...

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Номер записи: 85
17-04-2014 дата публикации

Gyroscope conditioning and gyro-camera alignment

Номер: US20140104445A1
Автор: Christopher Brunner, Mahesh Ramachandran, Murali R. Chari, Serafin Diaz Spindola
Принадлежит: Qualcomm Inc

An apparatus and method for generating parameters for an application, such as an augmented reality application (AR app), using camera pose and gyroscope rotation is disclosed. The parameters are estimated based on pose from images and rotation from a gyroscope (e.g., using least-squares estimation with QR factorization or a Kalman filter). The parameters indicate rotation, scale and/or non-orthogonality parameters and optionally gyroscope bias errors. In addition, the scale and non-orthogonality parameters may be used for conditioning raw gyroscope measurements to compensate for scale and non-orthogonality.

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Номер записи: 86
16-01-2020 дата публикации

PRODUCT TESTING SYSTEM WITH AUXILIARY JUDGING FUNCTION AND AUXILIARY TESTING METHOD APPLIED THERETO

Номер: US20200019853A1
Автор: Chang Pei-Ming, CHAO PAO-CHUNG, Hsu Shih-Chieh, HUANG WEI-LUNG
Принадлежит:

A product testing system and an auxiliary testing method are provided. The product testing system includes a computer and a test fixture. The computer has a machine learning model. The auxiliary testing method includes the following steps. Firstly, the test fixture tests the plural under-test products sequentially, and generates corresponding test data to the computer. Then, the computer generates plural trend line graphs corresponding to the test data. Then, the operator determines corresponding human judging results according to the trend line graphs. The test data, the trend line graphs and the human judging results are inputted into the machine learning model, and a learning process is performed. If the number of samples reaches a predetermined threshold value, the machine learning model generates auxiliary judging results according to the corresponding test data and the corresponding trend line graphs. 1. An auxiliary testing method for a product testing system and plural under-test products , the product testing system comprising a computer and a test fixture , the computer being in communication with the test fixture , the computer having a machine learning model , the auxiliary testing method comprising steps of:the test fixture testing the plural under-test products sequentially, and generating corresponding test data to the computer;the computer generating plural trend line graphs corresponding to the test data;the operator judging contents of the trend line graphs, and determining corresponding human judging results;inputting the test data, the trend line graphs and the human judging results into the machine learning model, and performing a learning process; andif the number of samples in the learning process reaches a predetermined threshold value, the machine learning model generating auxiliary judging results according to the corresponding test data and the corresponding trend line graphs.2. The auxiliary testing method according to claim 1 , wherein a ...

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Номер записи: 87
22-01-2015 дата публикации

LASER-DRIVEN OPTICAL GYROSCOPE WITH PUSH-PULL MODULATION

Номер: US20150022818A1
Автор: Digonnet Michel J.F., Fan Shanhui, Lloyd Seth
Принадлежит:

A system and method for reducing coherent backscattering-induced errors in an optical gyroscope is provided. A first time-dependent phase modulation is applied to a first laser signal and a second phase modulation is applied to a second laser signal. The phase-modulated first laser signal propagates in a first direction through a waveguide coil and the phase-modulated second laser signal propagates in a second direction opposite the first direction through the waveguide coil. The first time-dependent phase modulation is applied to the phase-modulated second laser signal after the phase-modulated second laser signal propagates through the waveguide coil to produce a twice-phase-modulated second laser signal. The second time-dependent phase modulation is applied to the phase-modulated first laser signal after the phase-modulated first laser signal propagates through the waveguide coil to produce a twice-phase-modulated first laser signal. The twice-phase-modulated first and second laser signals are transmitted to a detector. 1. A method of reducing coherent backscattering-induced errors in an output of an optical gyroscope , the method comprising:splitting laser light into a first laser signal and a second laser signal;applying a first time-dependent phase modulation to the first laser signal to produce a phase-modulated first laser signal;applying a second phase modulation to the second laser signal to produce a phase-modulated second laser signal, the second time-dependent phase modulation substantially equal in amplitude and of opposite phase with the first time-dependent phase modulation;propagating the phase-modulated first laser signal in a first direction through a waveguide coil;propagating the phase-modulated second laser signal in a second direction through the waveguide coil, the second direction opposite to the first direction;applying the first time-dependent phase modulation to the phase-modulated second laser signal after the phase-modulated second ...

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Номер записи: 88
28-01-2016 дата публикации

MEASURING DEVICE HAVING A FUNCTION FOR CALIBRATING A DISPLAY IMAGE POSITION OF AN ELECTRONIC RETICLE

Номер: US20160025491A1
Автор: GÄCHTER TOYA Stefan Martin Benjamin, KOTZUR Norbert, ZOGG Hans-Martin
Принадлежит:

Some embodiments of the invention relate to a measuring device, in particular a video theodolite or video tachymeter. The measuring device may include a base, a support, a telescope optics having a lens, a physical target marking, an eyepiece, and a camera. The measuring device may also include an evaluation and control unit containing stored calibration parameters with respect to an image position indicating the target direction as target image position in the captured image, and a display for displaying a captured image having marking for the target image position. In some embodiments, a function may be included to respect and/or restore. In some embodiments, the function may be in form of an application on the user-device interface that can be called up. 115-. (canceled)16. A surveying device , comprising:a base;a support, which is pivotable in relation to the base about a first axis; an objective,', 'a physical targeting marking defining a targeting direction,', 'an ocular, and', 'a camera for recording an image through the objective;, 'a targeting unit, which is pivotable in relation to the support about a second axis, having telescope optics defining an optical beam path having'}goniometers for measuring pivot positions of the support and the targeting unit;an analysis and control unit, which contains stored calibration parameters with respect to an image position indicating the targeting direction in the recorded image as the targeting image position; anda display screen for displaying a recorded image with marking for the targeting image position,wherein a partially automatic function for checking and/or recalibrating the targeting image position,wherein a sequence is defined for the function and corresponding items of sequence information are stored for this purpose in the analysis and control unit, during which sequence targeting actions of an identical target are successively performed at least once using the physical targeting marking and at least once ...

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Номер записи: 89
26-01-2017 дата публикации

OPPORTUNISTIC CALIBRATION OF A SMARTPHONE ORIENTATION IN A VEHICLE

Номер: US20170023379A1
Автор: Basir Otman A., El-Ghazal Akrem, Miners William Ben, Toonstra Jason
Принадлежит:

An opportunistic calibration method continuously monitors a smartphone orientation and compensates for its variation, as necessary. The method relies on the probabilistic fusion of built-in sensors; in particular, the GPS, accelerometer, gyroscope, and magnetometer. The calibration method may utilize a state-machine approach along with an orientation stability detection algorithm to keep track of the smartphone orientation over time and to coordinate the calibration process in an opportunistic manner. An orientation calibration method may rely mainly on the probabilistic fusion of GPS and magnetometer sensory data. 1. A method for calibrating a relative orientation of a smartphone in a vehicle including the steps of:a) determining a stability of the orientation of the smartphone based upon first sensory data;b) collecting second sensory data;c) estimating the relative orientation of the smartphone based upon the second sensory data collected in said step b) while the orientation of the smartphone was determined to be stable in said step a).2. The method of further including the step of receiving accelerometer data from an accelerometer in the smartphone and re-orienting the accelerometer data based upon said step c).3. The method of wherein the first sensory data in said step a) includes rates of rotation from a gyroscope in the smartphone.4. The method of wherein said step a) further includes the steps of comparing the first sensory data to a low threshold value to detect potential instability claim 1 , and validating the instability to determine whether the orientation is stable.5. The method of wherein the step of validating includes the step of comparing a recent sample of the first sensory data to an average of the first sensory data.6. The method of wherein the step of validating includes the step of determining instability based upon the recent sample exceeding the average by more than a threshold.7. The method of wherein the second sensory data includes GPS ...

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Номер записи: 90
22-01-2015 дата публикации

METHOD AND APPARATUS FOR DIAGNOSING INERTIA SENSOR

Номер: US20150025707A1
Автор: Babala Mike, Morningstar Greg, Zatyko Paul
Принадлежит:

A control system adapted to be mounted on a motor vehicle for control of a motor vehicle system in accordance with the inertial state of the motor vehicle. The control system includes an inertial sensor providing an inertial measurement output in accordance with the inertial state of the motor vehicle, where the inertial measurement output is referenced to a reference voltage. A controller is provided for controlling the motor vehicle system at least partially in accordance with the inertial measurement output. The controller includes a circuit for comparing the reference voltage used by the inertial sensor to a nominal voltage. The circuit causes the controller to discontinue use of the inertial measurement output when the reference voltage deviates from the nominal voltage. 1. Apparatus for providing inertial measurements , comprising an inertial sensor providing an inertial measurement output referenced to a reference value , and a circuit for evaluating the reference value and for selectively using the inertial measurement output in response to said evaluation.2. Apparatus as set forth in claim 1 , wherein an inertial measurement output equal to said reference value denotes zero angular rate of said sensor.3. Apparatus as set forth in claim 1 , wherein said evaluating circuit accepts or rejects said inertial measurement output in response to said evaluation.4. Apparatus as set forth in claim 1 , wherein said evaluation circuit rejects said inertial measurement output unless said reference is at or near a nominal value.5. Apparatus as set forth in claim 1 , wherein said inertial sensor is adapted to be powered by a DC power signal that is single ended claim 1 , and said reference is generally midway between said DC power signal and ground.6. A control system adapted to be mounted on a motor vehicle for control of a motor vehicle system in accordance with the inertial state of the motor vehicle claim 1 , comprising:an inertial sensor providing an inertial ...

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Номер записи: 91
25-01-2018 дата публикации

SYSTEMS AND PROCESSES FOR CALIBRATING UNMANNED AERIAL VEHICLES

Номер: US20180024571A1
Автор: Peasgood Michael
Принадлежит:

An unmanned aerial vehicle and process for automatically calibrating the unmanned aerial vehicle having at least one magnetic sensor is described. The calibration process involves receiving an internal or external control command to initiate a take-off process by the unmanned aerial vehicle. A hover mode maintains the unmanned aerial vehicle at hover position, and a calibration rotation sequence rotates the unmanned aerial vehicle. The calibration process further involves receiving measurement data from sensors of the unmanned aerial vehicle during the calibration rotation sequence and calculating calibration parameters using the measurement data. The calibration process may implement corrections using the calibration parameters. 1. An unmanned aerial vehicle comprising:a frame;an operations control to control operation of the unmanned aerial vehicle;a calibration control to initiate automatic calibration of the unmanned aerial vehicle by a hover mode for maintaining the unmanned aerial vehicle at hover position, and a calibration rotation sequence for rotating the unmanned aerial vehicle around at least one axis of the frame;flight control and navigation control for controlling motion of the unmanned aerial vehicle to implement the hover mode and the calibration rotation sequence;sensors to obtain measurement data during the calibration rotation sequence, wherein the sensors include at least one magnetic sensor for calibration;a calibration calculator to calculate calibration parameters using the measurement data obtained during the calibration rotation sequence.2. The unmanned aerial vehicle of wherein the calibration control updates or corrects measurement or compensation values of the magnetic sensor or other instrument using the calibration parameters.3. The unmanned aerial vehicle of wherein the calibration parameters comprise a bias factor and a scale factor.4. The unmanned aerial vehicle of further comprising a communication device to transmit the ...

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Номер записи: 92
28-01-2021 дата публикации

METHOD AND SYSTEM FOR AUTONOMOUS VEHICLE CONTROL

Номер: US20210024081A1
Автор: Johnson-Roberson Matthew, Vasudevan Ram
Принадлежит:

The method for autonomous vehicle control preferably includes sampling measurements, determining refined sensor poses based on the measurements, determining an updated vehicle pose based on the measurements and operation matrix, optionally determining evaluation sensor poses based on the refined sensor poses, optionally updating the operation matrix(es) based on the evaluation sensor poses, and/or any other suitable elements. The system for autonomous vehicle control can include one or more vehicles, one or more sensors, one or more processing systems, and/or any other suitable components. 1. A system for autonomous vehicle control , comprising:a vehicle;a plurality of sensors mounted to the vehicle; and receive measurements from the plurality of sensors;', 'determine an observation calibration for the plurality of sensors;', 'calculate sensor poses for each of the plurality of sensors based on the measurements and the operation calibration using a bundle adjustment;', 'calculate an evaluation calibration based the sensor poses using a Kalman filter, wherein the evaluation calibration represents an updated version of the operation calibration; and', 'selectively update the operation calibration based on the evaluation calibration., 'a processor, configured to2. The system of claim 1 , wherein the vehicle weighs no more than 100 pounds in an unloaded state.3. The system of claim 1 , wherein a stopping distance of the vehicle in a loaded state is less than 5 feet.4. The system of claim 1 , wherein the processor is further configured to:calculate a vehicle pose using the bundle adjustment; andcontrol the vehicle based on the vehicle pose.5. The system of claim 1 , wherein the plurality of sensors comprises a visual system claim 1 , wherein the visual system comprises a camera and an inertial measurement unit (IMU) claim 1 , and wherein the measurements comprise acceleration measurements from the IMU that were contemporaneously sampled with visual measurements from the ...

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Номер записи: 93
24-01-2019 дата публикации

Method and system for finding handling trolleys

Номер: US20190025058A1
Автор: Henri Teboulle
Принадлежит: Sagemcom Energy and Telecom SAS

System for finding at least one mobile trolley in a locale, the system including at least one communication beacon which has a range covering the locale and which is connected to a computer control unit, and at least one electronic module mounted on the trolley and including a transmission device arranged to transmit position data to the communication beacon, and an inertial motion detection hub that includes a device for detecting linear motion along axes of a detection reference system and a device for detecting angular motion about the axes of the detection reference system and that is arranged to provide position data on the basis of linear motion measurement data and angular motion measurement data, the module being mounted on an element of the trolley such that any movement of the trolley within the locale causes angular movement of the element, the system being arranged to detect when the trolley is stopped when the angular motion measurement data correspond to zero angular motion at one measurement instant and being arranged to set to zero speeds calculated on the basis of the linear motion measurement data corresponding to the same measurement instant.

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Номер записи: 94
10-02-2022 дата публикации

Optical sensor for odometry tracking to determine trajectory of a wheel

Номер: US20220044418A1
Автор: Boon-How KOK, Dennis Dominic Donald, Keen-Hun LEONG
Принадлежит: PixArt Imaging Inc

An optical sensor system mounted in a wheel arch of a car for determining trajectory of the car includes: a first optical sensor mounted in the wheel arch above a wheel and located behind a first clear casing that does not touch the wheel; and a second optical sensor mounted in the wheel arch on one side of the wheel and located behind a second clear casing that does not touch the wheel. The first optical sensor and second optical sensor perform a plurality of counts corresponding to respectively capturing a plurality of images of the wheel. The captured images are compared with a reference image to determine a 2D displacement of the wheel from its original position. The trajectory of the car is determined by calculating a turning degree of the wheel according to a trigonometric manipulation of the measured 2D displacement.

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Номер записи: 95
23-01-2020 дата публикации

NAVIGATION SYSTEM UTILIZING YAW RATE CONSTRAINT DURING INERTIAL DEAD RECKONING

Номер: US20200025572A1
Автор: Bobye Michael
Принадлежит:

A system operating in a dead reckoning mode accumulates relative yaw measurements, i.e., measurements of rotation about a z-axis, made by one or more over mechanization update intervals and produces dead reckoning mechanization update values. The system accumulates the values over a turn rate accumulation period, calculates a yaw rate and determines if the yaw rate exceeds a turn rate threshold. If so, the system directs an INS filter to perform a zero yaw rate update at the start of a next mechanization update interval, to correct for the z-axis drift errors of the gyroscopes based on the sensed rotation in the relative yaw measurements over the previous mechanization update interval. The system then sets the z-axis drift errors to zero. If the system determines that the yaw rate exceeds the turn rate threshold, the zero yaw rate update is not performed at the start of the next mechanization update interval. 1. A method includingprocessing information from a plurality of IMU sensors including one or more gyroscopes that measure rotation about a z axis to produce IMU measurements for the respective sensors,accumulating the z-axis measurements over mechanization update intervals to produce dead reckoning mechanization update values, accumulating the values over a turn rate accumulation period, and calculating a yaw rate,during a dead reckoning mode determining at the start of a mechanization update interval if the yaw rate exceeds a turn rate threshold, and if not, directing that a zero yaw update be performed, andperforming the zero yaw rate update if directed to do so at the start of a next mechanization update interval to update z-axis error states and constrain the z-axis drift errors of the one or more gyroscopes,setting the INS-based position, velocity and attitude at the end of the previous mechanization update interval as the INS-based position, velocity and attitude for start of a next mechanization update interval, andproducing one or more of INS-based ...

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Номер записи: 96
23-01-2020 дата публикации

SYSTEM WITH OVEN CONTROL AND COMPENSATION FOR DETECTING MOTION AND/OR ORIENTATION

Номер: US20200025795A1
Автор: CHALLONER Anthony, Lee Sangwoo, MITCHELL Jay
Принадлежит:

Motion and/or orientation sensing systems can utilize gyroscopes, accelerometers, magnetometers, and other sensors for measuring motion or orientation of connected objects. Temperature changes affect the precision of the data output by the motion/orientation sensing device. A system is provided for controllably heating a device within a package to a desired temperature that varies based on the ambient temperature. The operating temperature of the device can then be known and controlled. The ambient temperature can be known through an ambient temperature sensor, for example. Given this information, a controller compensates the data output by the device to further improve the accuracy in the measurements. Like the amount of heating provided to the package, the amount of compensation is also based on the ambient temperature and/or the device temperature. 1. A system for improving accuracy in a motion or orientation sensing device , the system comprising:an isolation platform having a device mounting region and an isolation structure providing mechanical and electrical connections between the device and components not located on the device-mounting region;a heat source disposed on the isolation platform;a device disposed on the isolation platform; andat least one internal temperature sensor disposed in a local area on the isolation platform adjacent the device and configured to detect a temperature of the local area; receive internal temperature signals from the at least one internal temperature sensor indicating the temperature of the local area,', 'receive signals indicating an ambient temperature of an ambient environment,', 'control the heat source to achieve a desired temperature of the local area,', 'receive signals from the device, and', 'compensate the received signals from the device by a compensation factor that varies based on a combination of the temperature of the local area and the ambient temperature., 'at least one controller programmed to2. The system ...

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Номер записи: 97
28-01-2021 дата публикации

Maintaining a Trained Neural Network in Magnetic Fingerprint based Indoor Navigation

Номер: US20210025732A1
Автор: Huberman Sean, Ohab Henry L.
Принадлежит: MAPSTED CORP.

A method and system of maintaining a trained neural network for mobile device indoor navigation and positioning. The method comprises receiving a set of magnetic measured parameters acquired at a mobile device positioned at a first location of an indoor area; computing, at an output layer of a trained neural network, an output error based on comparing a magnetic input feature in accordance with the magnetic measured parameters to a magnetic output feature generated at the output layer, the magnetic output feature being generated at least in part based on a matrix of weights associated with at least a first neural network layer; and if the output error exceeds a threshold value, re-training the neural network based at least in part upon re-initializing the matrix of weights associated with the at least a first neural network layer. 1. A method , executed in a processor of a server computing device , of maintaining a trained neural network for mobile device indoor navigation , the method comprising:receiving a set of magnetic measured parameters acquired at a mobile device positioned at a first location of an indoor area;computing, at an output layer of a trained neural network, an output error based on comparing a magnetic input feature in accordance with the magnetic measured parameters to a magnetic output feature generated at the output layer, the magnetic output feature being generated at least in part based on a matrix of weights associated with at least a first neural network layer; andif the output error exceeds a threshold value, re-training the neural network based at least in part upon re-initializing the matrix of weights associated with the at least a first neural network layer.2. The method of wherein re-initializing the matrix of weights comprises re-initializing the matrix of weights to a matrix of weights corresponding to magnetic input parameters in accordance with a magnetic infrastructure profile of at least a portion of the indoor area.3. The ...

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Номер записи: 98
24-01-2019 дата публикации

Optical sensor for odometry tracking to determine trajectory of a wheel

Номер: US20190026903A1
Автор: Boon-How KOK, Dennis Dominic Donald, Keen-Hun LEONG
Принадлежит: PixArt Imaging Inc

An optical sensor system for determining trajectory of a car, the optical sensor system being mounted in a wheel arch of the car, includes: a plurality of optical sensors mounted in the wheel arch above a wheel, the optical sensors being located behind a plurality of clear casings that do not touch the wheel, for performing a plurality of counts corresponding to respectively capturing a plurality of images of the wheel according to an outer surface of the wheel evenly covered with wheel treads. The captured images are compared with a reference image to determine a 2D displacement of the wheel from its original position. This measured 2D displacement is converted into a distance the wheel travels along a path, and the wheel trajectory is determined by calculating a turning degree of the wheel according to a trigonometric manipulation of the captured 2D displacement.

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Номер записи: 99
04-02-2016 дата публикации

System and Method for Attitude Correction

Номер: US20160033301A1
Автор: Chang Edward, Yang Qingxuan
Принадлежит:

A system and method for attitude correction is provided. An acceleration and an attitude of an electronic device are detected. A period of time where a velocity of the electronic device at the beginning of the period of time and a velocity of the electronic device at the end of the period of time are equal is identified. An attitude correction is calculated based on the identified period of time and the detected acceleration of the electronic device during the period of time. The detected attitude of the electronic device is corrected with the calculated attitude correction. 1. A computer-implemented method for attitude correction , the method comprising:detecting an acceleration and an attitude of an electronic device;identifying a period of time wherein a velocity of the electronic device at the beginning of the period of time and a velocity of the electronic device at the end of the period of time are equal;calculating an attitude correction based on the identified period of time and the detected acceleration of the electronic device during the period of time; andcorrecting the detected attitude of the electronic device with the calculated attitude correction.2. The computer-implemented method of claim 1 , wherein the electronic device is in a static state at the beginning of the period of time and the end of the period of time.3. The computer-implemented method of claim 2 , wherein identifying the period of time comprises:periodically storing a detected acceleration value in a signal queue at a first time interval;for each detected acceleration value over a second time interval, comparing a difference between the detected acceleration value and a previously stored acceleration value with a threshold value; anddesignating the beginning of the second time interval as the beginning of the period of time and the end of the second time interval as the end of the period of time if the differences between the detected acceleration values and the previously stored ...

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