ИЗМЕРЕНИЕ ТЕМПЕРАТУРЫ МОЧЕВОГО ПУЗЫРЯ ДЛЯ ВЫСОКОИНТЕНСИВНОГО СФОКУСИРОВАННОГО УЛЬТРАЗВУКА

FIELD: medicine.SUBSTANCE: group of inventions relates to medical equipment, namely to body temperature measurement means when performing high-intensity focused ultrasonic action. Medical instrument comprises high-intensity focused ultrasonic system for ultrasonic action on target area inside subject, light source for excitation of heat-sensitive fluorescent dye, wherein the light source is configured to be connected to the urinary catheter fiber optic cable, a light sensor for measuring fluorescence emitted by the heat-sensitive fluorescent dye, wherein the light sensor is configured to be connected to the fiber optic cable, the fluorescent dye container and the pumping system configured to be connected to the urinary catheter, wherein the pumping system is further connected to the fluorescent dye container and is configured to be pumped from the fluorescent dye container to the distal end of the urinary catheter, memory for storing computer-executable instructions and a processor for managing the medical instrument, wherein execution of computer-executable instructions causes processor to receive ultrasound exposure plan to target area, measure fluorescence using light sensor, calculating bladder temperature using fluorescence, and generating ultrasonic exposure commands using an ultrasound exposure plan and urinary bladder temperature, wherein the ultrasonic action commands are intended to control a high-intensity focused ultrasonic system for ultrasonic action on the target area. Device is equipped with a machine-readable carrier storing a computer program product containing computer-executable instructions for execution by a processor controlling a medical instrument.EFFECT: use of inventions makes it possible to increase efficiency of body temperature measurement, which is compatible with HIFU.13 cl, 9 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 686 294 C1 (51) МПК A61N 7/02 (2006.01) G01K 11/32 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ ( ...

Fernmessung physikalischer Variablen mit faseroptischen Systemen

OPTICAL-FIBRE SENSOR FOR MEASURING PHYSICAL QUANTITIES

Faseroptische Messvorrichtung

Für eine faseroptische Messvorrichtung mit einem optisch transparenten Sensorkopf (2), der mit zumindest einer Lichtsendefaser (4) und zumindest einer Lichtempfangsfaser (5) oder einem zweiten Lichtleiter verbunden ist, mit einer Lichtquelle, die direkt oder wirkungsmäßig mit der Lichteigangsfaser (5) verbunden ist, wobei die Lichtsendefaser (4) zumindest einen Teil des Lichtes der Lichtquelle in den Sensorkopf (2) leitet, welches an zumindest einer optischen Grenzschicht (7) des Sensorkopfes (2) mindestens einmal reflektierbar ist und in die Lichtempfangsfaser (5) auskoppelbar ist und mit einem Lichtdetektor verbunden ist, soll eine Lösung geschaffen werden, die sich durch eine weitgehende Unempfindlichkeit gegenüber elektromagnetischen Störungen und sehr geringe eigene Abstrahlungen auszeichnet und mit der die Messung mehrerer Parameter wie der Betauungszustand und die Temperatur mittels eines Sensors möglich ist. Dies wird dadurch erreicht, dass in dem Sensorkopf (2) zumindest ein temperaturabhängiger ...

Optical sensor

Temperature sensing system

A temperature sensing and measuring system in which a luminescent material is excited using a light source. The luminescence emitted decays with time, the decay time being dependent on temperature. Thus by monitoring the excitation and luminescence transmitted to and from the material via an optical fibre, the decay time constant and thus the temperature can be determined.

Improvements relating to pressure sensitive paint

Fiber-optic temperature-measuring apparatus

A fiber-optic temperature-measuring apparatus which monitors the photo-luminescence of a body of solid material subjected to the temperature to be measured. Exciting radiation is conducted by means of at least one optical fiber towards a material with temperature-dependent luminescence which is in optical contact with the fiber, whereby luminescence occurs. The radiation emitted as a consequence of the luminescence is transmitted via at least one optical fiber from the body to a place of measurement, where a measure of the temperature may be obtained. The luminescent body may consist of a semiconductor material.

FIBRE OPTIC TEMPERATURE-MEASURING APPARATUS

OPTICAL SENSOR

USES FOR THE WAERMEFLUSSAENDERUNG OF A THERMOMETRIC BULB.

FIBEROPTIC SENSING OF TEMPERATURE AND/OR OTHER PHYSICAL PARAMETERS

Abstract of the Disclosure Several specific types of optical sensors capable of measuring temperature, pressure, force, accel-leration, radiation and electrical fields, fluid level, vapor pressure, and the like, are disclosed, along with an electro-optical system for detecting the optical signal developed by the sensor. One such probe utilizes a convex shaped structure consisting of an elastomeric material attached to an end of an optical fiber, the elastomeric material being coated with a luminescent material, a combination that is capable of measuring both temperature and pressure. Such a probe is also specifi-cally adapted for measuring surface temperature by making a good physical contact with the surface being measured. Another such probe utilizes a similar structure but of a non-elastomeric material for the purpose of detecting both temperature and either index of refraction or vapor pressure changes. Improvements in other existing sen-sors of a wide variety of physical parameters other than temperature are also described wherein temperature is simultaneously measured for correcting such physical parameter measurements that are affected by temperature variations.

OPTICAL SENSOR HAVING ATOMICALLY LOCALIZED LUMINESCENCE CENTERS

A fiber optical sensor for detecting a change in a physical quantity which comprises a body of a solid, and substantially optically transparent bonding material, the bonding material determining the mechanical properties of said body. At least 1% by weight of atomically localized liminescent centers are included as a solution in the bonding material, these centers substantially determining the luminescent properties of said body.

SINGLE PIECE FABRY-PEROT OPTICAL SENSOR AND METHOD OF MANUFACTURING THE SAME

An optical sensor and a method of manufacturing such as sensor are provided. The sensor includes a lead optical fiber with a single piece optical element joined permanently joined to its forward end. The optical element defines a spacer with a cavity therein at one end, and a diaphragm at the opposite end. The diaphragm is flexible in response to a parameter and the sensor defines a sensing Fabry-Perot resonator.

PHOTOLUMINESCENT TEMPERATURE SENSOR UTILIZING A SINGULAR ELEMENT FOR EXCITATION AND PHOTODETECTION

A photoluminescent temperature sensing system and method utilizes a single semi-conductor optical device adapted to operate as both a light-emitting device and a light detection device, a photoluminescent material, and a processor operatively connected to the driving circuit and configured to execute a method comprising the steps of driving the optical device to emit a pulse of incident light, producing photoluminescent light, receiving the photoluminescent light with the optical device, and creating signal information associated with a temperature-dependent characteristic of the photoluminescent light, and deriving temperature information from the signal information.

RUBY DECAY-TIME FLUORESCENCE THERMOMETER

Ruby fluorescence-based fiber optic thermometer using the change in the fluorescent characteristics of a small sample of doped ruby (Al2O3 +0.05%Cr) crystal as a function of temperature. This sensor is based on exciting the crystal by light from bright LED (lightemitting diodes) emitting at 565 nm and the measurement of the fluorescent decay time is made to determine temperature. The system provide a high degree of accuracy and resolution combined with an overall simplicity of design and small size, with very low cost.

AGENCEMENT D'APPAREIL SUJET A UN CHAUFFAGE INTERNE ET DE CAPTEUR DE TEMPERATURE

AGENCEMENT D'APPAREIL SUJET A UN CHAUFFAGE INTERNE ET DE CAPTEUR DE TEMPERATURE. L'AGENCEMENT SELON LA PRESENTE INVENTION COMPREND UNE STRUCTURE QUI EST SUJETTE A UN CHAUFFAGE INTERNE ET UN CAPTEUR DE TEMPERATURE POUR DETECTER LA TEMPERATURE A UN ENDROIT PREDETERMINE A L'INTERIEUR DE LADITE STRUCTURE ET POUR FOURNIR UN SIGNAL REPRESENTANT LA TEMPERATURE DETECTEE. LE CAPTEUR DE TEMPERATURE COMPREND UNE SONDE 14 A FIBRE OPTIQUE ET UN TUBE 12 PROTECTEUR QUI EST REALISE ET AGENCE DE MANIERE QUE L'ON PUISSE Y INTRODUIRE LIBREMENT LA SONDE A FIBRE OPTIQUE ET L'EN RETIRER LIBREMENT. CET AGENCEMENT PERMET D'INSTALLER LE CAPTEUR DE TEMPERATURE ESSENTIELLEMENT SANS RISQUE D'ENDOMMAGER LA SONDE A FIBRE OPTIQUE ET D'ENLEVER ET REMPLACER FACILEMENT CETTE DERNIERE APRES SON MONTAGE. APPLICATION: ENTRE AUTRES, TRANSFORMATEURS, MOTEURS ET GENERATEURS ELECTRIQUES.

APPAREIL DE MESURE DE TEMPERATURE A FIBRES OPTIQUES

L'invention concerne la mesure des températures. Un appareil de mesure de température est basé sur la photoluminescence d'une matière solide soumise à la température à mesurer. Des fibres optiques 2-3 transmettent de la lumière vers une matière 1 qui peut être par exemple un semi-conducteur présentant une photoluminescence qui est fonction de la température. La lumière émise par luminescence est transmise par des fibres optiques 2-4-5 vers un emplacement de mesure 11. Application aux mesures de température en présence de champs électriques ou magnétiques intenses. (CF DESSIN DANS BOPI) ...

CAPTEUR DE TEMPERATURE A FIBRE OPTIQUE

CAPTEUR DE TEMPERATURE A FIBRE OPTIQUE COMPORTANT UNE SUBSTANCE FLUORESCENTE DONT LE TEMPS D'AMORTISSEMENT DE LA FLUORESCENCE DEPEND DE LA TEMPERATURE. DANS CE CAPTEUR, LE RAYONNEMENT DE FLUORESCENCE ARRIVANT AU RECEPTEUR 3 EST COUPLE EN REACTION AU RAYONNEMENT D'EXCITATION PROVENANT DE L'EMETTEUR 1 DANS UN CIRCUIT OSCILLANT, PAR L'INTERMEDIAIRE D'UN SYSTEME TEMPORISATEUR 4, DES MOYENS 8 ETANT PREVUS POUR MESURER LA FREQUENCE DU CIRCUIT OSCILLANT. CETTE FREQUENCE, FONCTION DU TEMPS D'AMORTISSEMENT DE LA FLUORESCENCE, PERMET DONC DE CONNAITRE LA TEMPERATURE. APPLICATION A DE NOMBREUX DOMAINES DE LA TECHNIQUE ET DE LA MEDECINE, POUR LA TRANSMISSION DE TEMPERATURES A DISTANCE.

DEVICE FOR THE TEMPERATURE MEASUREMENT USING A DETECTING ELEMENT

a) Dispositif pour la mesure de température à l'aide d'un élément détecteur. b) Caractérisé en ce que l'élément détecteur 10 est fixé par une soudure de verre 16 à une extrémité d'au moins un premier guide d'ondes optique 14, en ce que la soudure de verre 16 et le premier guide d'ondes optique 14 présentent des coefficients de dilatation thermique qui sont au moins égaux au coefficient de dilatation thermique de l'élément détecteur 10, et en ce que l'autre extrémité du premier guide d'ondes optique 14 est raccordée, dans une zone de basse température, à un second guide d'ondes optique 24. c) L'invention concerne un dispositif pour la mesure de température à l'aide d'un élément détecteur. a) Device for temperature measurement using a sensor element. b) Characterized in that the detector element 10 is fixed by a glass weld 16 to one end of at least a first optical waveguide 14, in that the glass weld 16 and the first waveguide optical 14 have thermal expansion coefficients which are at least equal to the thermal expansion coefficient of the detector element 10, and in that the other end of the first optical waveguide 14 is connected, in a low temperature region , to a second optical waveguide 24. c) The invention relates to a device for measuring temperature using a detector element.

Fibre-optic temperature sensor

Fibre-optic temperature sensor comprising an optical fibre (1) combined with a temperature-sensitive element and fitted with a mirror (3) at its end, means for emitting a signal into the said fibre and means for receiving the signal returned by the said mirror in this fibre, characterised in that the said temperature-sensitive element is a segment of amplifier optical fibre (10) doped with a chosen rare earth interacting with an optical pumping source and welded to the said optical fibre (1).

TEMPERATURE GAUGE HAS FIBEROPTIC

THERMALLY COMPENSATED FLUORESCENCE DECAY RATE TEMPERATURE SENSOR AND METHOD OF USE

The present invention provides a thermally compensated fluorescence decay rate temperature sensor capable of measuring the true temperature of a sample surface and its associated method of use.

IN SITU OPTICAL SURFACE TEMPERATURE MEASURING

A temperature sensor that has a thermally conducting contact with a surface that emits electromagnetic radiation in proportion to the temperature of the contact is disclosed. The sensor has a resilient member attached to the contact and configured to extend the contact toward the object to be measured. A first light waveguide is attached to the contact and is configured to transmit the electromagnetic radiation from the contact. The sensor has a guide with a bore formed therein that the first waveguide is insertable into. When the contact is moved, the first waveguide moves within the bore. A second waveguide is attached to the guide such that a variable gap is formed between the ends of the first waveguide and the second waveguide. Electromagnetic energy from the first waveguide traverses the gap and can be transmitted by the second waveguide. The guide allows the first waveguide to move with the contact in order to ensure that the contact is fully engaged with the surface of the object.

Fiber optic temperature probe for oil-filled power transformers

A temperature probe for use in oil-filled transformers comprises an optical fiber, a temperature sensitive member, and a protective cylindrical sheath. The optical fiber and the sensitive member are located in the protective sheath, and continuous longitudinal slit is defined along the length of the sheath to allow oil to flow therein. The optical fiber is mounted in and to the sheath using a bonding material and at a distance from the sheath. The sensitive member is adhesively mounted to the optical fiber, within the sheath, and at a distance thereof.

Temperature probe

A temperature probe measures temperature changes within biological material while the tissue is being irradiated with microwaves. In order to measure tissue temperatures accurately a probe must be designed to function in a microwave field while causing minimum perturbation to the microwave field. This generally requires a probe being constructed of dielectric (non-metallic) material which utilizes physical phenomena which are thermally dependent yet unaffected by electromagnetic fields at the field strength and frequencies of interest. In one embodiment the structure of the probe basically includes an optical fiber bundle for conducting light both toward and away from a temperature sensitive luminescent element located at one end of the optical fiber bundle, the source for exciting the temperature sensitive element and a light responsive detection element located at the output end of the optical fiber bundle for detecting light emitted from the temperature sensitive element which is temperature ...

Optical systems for sensing temperature and other physical parameters

Optical sensors for physical parameters use a parameter-dependent relative distribution of the intensity of interrogating light of wavelengths (lambda)1 between two light-guiding regions of a light-guiding probe. The relative distribution can be determined by a plurality of means including the spatial separation of the lights carried by the two light-guiding regions, and/or the conversion of one of the lights into light of wavelengths (lambda)2 different and easily separable from light of wavelength (lambda)1. The sensors can be adapted to measure diverse physical parameters, including but not limited to temperature, and to measure infrared radiation by measuring its heating effect on the sensing probes.

Remote sensing of physical variables with fiber optic systems

The invention relates to methods and devices for measuring physical parameters by converting a fraction of the intensity of the interrogating light into a positive optical signal with wavelengths and/or light propagation modes different from those of the interrogating light, and having at least one characteristic which is a known function of the physical parameter being measured. The invention is adapted to the measurement of distributed forces and/or temperatures along a continuous length of optical fiber, and to the non-invasive coupling of information into an optical fiber from the side at any point or a multiplicity of points. The optical fiber is so designed that information signals coupled into it simultaneously at different points are separable at one end of the fiber and measurable without interference from each other.

Temperature measurement with combined photo-luminescent and black body sensing techniques

High temperature range black body techniques are combined with lower temperature range photoluminescent techniques to provide an optical method and apparatus for measuring temperature over a very wide range. Various optical probe configurations are disclosed which combine the black body and photoluminescent technologies. Signal detection and processing can be combined, and temperature measurements made by the photoluminescent technique within an overlap of the two temperature ranges can be used to calibrate measurements made in the higher range by the black body technique.

APPARATUS FOR DETERMINING A TEMPERATURE OF A SUBSTRATE AND METHODS THEREFOR

An apparatus for measuring a temperature of a substrate is disclosed. The apparatus includes a phosphor material in direct contact with the substrate and in thermal contact with the substrate, the phosphor material producing a fluorescent response in a first wavelength range when exposed to a electromagnetic radiation in a second wavelength range, the fluorescent response decaying at a decay rate that is related to a temperature of the phosphor material, and the phosphor material producing a first set of non volatile byproducts when exposed to a plasma.

Fluorescent temperature sensor

To provide a fluorescent temperature sensor wherein light is propagated reliably with an easy adjustment. A fluorescent temperature sensor for producing a temperature signal from fluorescent light of an optically excited fluorescent material includes: a light emitting device for projecting light to the fluorescent material; a photoreceiving element for receiving fluorescent light emitted from the fluorescent material 1; a case for housing both the light emitting device and the photoreceiving element; and an optical fiber, between the case and the fluorescent material, for propagating the light of both the light emitting device and the fluorescent material. The case and the optical fiber are positioned so that the light from the light emitting device is received within the optical fiber, and so that the light from the fluorescent material is incident on the photoreceiving element from within the optical fiber.

FIBER OPTIC TEMPERATURE CONTROL SYSTEM

Examples of a fiber optic temperature control system is provided. The fiber optic temperature control system comprises two or more independent temperature measuring system combined into single fiber optic probe. The fiber optic temperature control system comprises at least one temperature control measuring system and an overtemperature measuring protection system. The least one temperature control measuring system comprises a first temperature controller, a first opto-electronic converter with a first light source, a first detector and a first processor, and a first fiber optic bundle with a plurality of optical fibers to provide temperature measurement from at least one point. The over temperature measuring protection system comprises a second controller, a second opto-electronic convertor with a second detector and second processor, and a second fiber optic bundle with a plurality of optical fibers. A splitter coupled to the first and the second fiber optic bundles to physically separate ...

Measuring sensor for combined pressure and temperature measurement of e.g. gas, in common-rail-system in automobile, has optical pressure sensor producing optical pressure signal corresponding to pressure of fluid medium

The sensor (110) has an optical temperature sensor (136) i.e. fiber optic temperature sensor, producing an optical temperature signal corresponding to temperature of fluid medium. An optical pressure sensor (138) i.e. fiber optic pressure sensor, produces an optical pressure signal corresponding to pressure of the fluid medium. The temperature sensor includes a sensor crystal (148) i.e. yttrium-aluminum-granite crystal, changing optical property e.g. luminescence property, corresponding to the temperature of the fluid medium. The temperature sensor measures a decay period of luminescence.

Verfahren zum Betreiben eines Hochofens

Fibre optic sensing system

Temperature measurement of fiber optics by means of thermal induced fluorescence

FIBER-OPTIC TEMPERATURE-MEASURING APPARATUS

FIBRE OPTIC TEMPERATURE SENSOR

OPTICAL TEMPERATURE MEASURING TECHNIQUE.

MEASUREMENT OF SURFACE TEMPERATURE

WAVEGUIDE CONTAINING COMMUNICATION AND SENSING SYSTEMS

WAVEGUIDE-CONTAINING COMMUNICATION AND SENSING SYSTEMS An optical system, including a waveguide such as an optical fiber, in which optical signals are noninvasively coupled into the waveguide at any point along the length of the waveguide, is disclosed. This is achieved by coupling substantially constant intensity electromagnetic radiation into the waveguide, and then impinging upon the waveguide a directed beam of energy, such as electromagnetic radiation or heat, from an energy source. Alternatively, the waveguide is impinged upon by a combination of an energy beam and a stimulus, e.g., a temperature change. The energy beam, or energy beam and stimulus, induce at least partial absorption of the guided, substantially constant intensity electromagnetic radiation by radiation-absorbing material in the waveguide, to produce the desired optical signal.

Method and apparatus for measuring a distributed physical value of an optical device under test

PROCESS AND DEVICE TO REMOTELY MEASURE the DISTRIBUTION Of a PHYSICOCHEMICAL PARAMETER IN a MEDIUM

PROBE OF MEASUREMENT COMPRISING AT LEAST A FIBEROPTIC, DEVICE OF MEASUREMENT ETINSTALLATION COMPRISING AT LEAST SUCH A PROBE

FITTING Of PRONE APPARATUS HAS an INTERNAL HEATING AND OF TEMPERATURE GAUGE

FIBER OPTIC TEMPERATURE SENSOR.

PROCEDE ET DISPOSITIF POUR MESURER A DISTANCE LA DISTRIBUTION D'UN PARAMETRE PHYSICO-CHIMIQUE DANS UN MILIEU

Le procédé consiste à exciter à travers une fibre optique 18 successivement des points de mesure 20 situés dans un milieu 17, l'excitation de chaque point 20 étant effectuée simultanément par deux impulsions optiques de longueurs d'ondes différentes décalées d'un intervalle de temps, chaque point de mesure renvoyant un rayonnement d'une troisième longueur d'onde, représentatif de la température du point de mesure. Le dispositif comporte deux lasers 3, 4 émettant à des longueurs d'onde différentes, un circuit de retard 5 de l'impulsion optique d'un 4 des deux lasers, les points de mesure comprenant un matériau sensible à une excitation biphotonique. Application à la mesure des températures. (CF DESSIN DANS BOPI) ...

PROCESS AND OPTICAL DEVICE OF DETERMINATION OF THE TEMPERATURE USING PHOSPHORESCENT MATTERS

MEASURING DEVICE OF TEMPERATURE HAS FIBEROPTICS

TEMPERATURE GAUGE HAS FIBEROPTIC

ELECTRODE FORMING METHOD FOR CERAMIC CONDENSER

The method forms electrode on two surfaces of ceramic condenser through inserting electrode printing board with inserted ceramic condenser into electrode printing device. The methode includes electrode printing board (1) with perforated holes (8), for inserting ceramic disc (4); support plate (9) not to separate ceramic disc from perforated hole; screen patterning member for forming the adhesive (10) on the disc (4); electrode printing device having two screen patterns (11a) for printing electrode on two surfaces of the board (1), two rollers (12)(12a) for printing electrode. Copyright 1997 KIPO ...

APPARATUS FOR DETERMINING A TEMPERATURE OF A SUBSTRATE AND METHODS THEREFOR

An apparatus for measuring a temperature of a substrate is disclosed. The apparatus includes a phosphor material in thermal contact to the substrate, the phosphor material producing a fluorescent response in a first wavelength range when exposed to an electromagnetic radiation in a second wavelength range, the fluorescent response decaying at a decay rate that is related to a temperature of the phosphor material, and the phosphor material producing a first set of non volatile byproducts when exposed to a plasma. The apparatus also includes a barrier window positioned between the phosphor material and a plasma, wherein the barrier window allows at least a portion of the first wavelength and the second wavelength to be transmitted, and wherein the barrier window produces a second set of non volatile byproducts that is less than the first set of non volatile byproducts when exposed to the plasma, wherein when the electromagnetic radiation is transmitted to the phosphor material through the ...

Cryogenic thermometer employing molecular luminescence

A cryogenic thermometer using molecular luminescence determines temperature. A sensor material is used which is capable of emitting radiant energy from a spin multiplet when excited, the excited state being characterized by a large zero field splitting (ZFS), and in which two of the sublevels split by the ZFS are radiative in the visible or near infrared region and are optically resolvable from each other. Spin-lattice relaxation rates between the sublevels are much larger than the sublevel decay rates to other states in order that their populations remain close to thermal equilibrium during optical pumping. The relative intensity of the two bands of radiation is determined and the temperature calculated therefrom. Xanthione (XS) dissolved in n-hexane may be used as a sensor material in the optimum range of 3 to 10K, with estimated precision varying between 0.4 mK and 3.0 mK within this range. Other disclosed sensor materials should allow extension of the optimal range to about 20K on the ...

Nanoparticle thermometry and pressure sensors

A nanoparticle fluorescence (or upconversion) sensor comprises an electromagnetic source, a sample and a detector. The electromagnetic source emits an excitation. The sample is positioned within the excitation. At least a portion of the sample is associated with a sensory material. The sensory material receives at least a portion of the excitation emitted by the electromagnetic source. The sensory material has a plurality of luminescent nanoparticles luminescing upon receipt of the excitation with luminance emitted by the luminescent nanoparticles changing based on at least one of temperature and pressure. The detector receives at least a portion of the luminance emitted by the luminescent nanoparticles and outputs a luminance signal indicative of such luminance. The luminescence signal is correlated into a signal indicative of the atmosphere adjacent to the sensory material.

Method and apparatus for measurement of the fluorescence relaxation period of a fluorescent substance

The subject of the present invention consists of a method and an apparatus for measurement of the fluorescence relaxation period of the radiation of a fluorescent substance whose fluorescence relaxation period is a function of at least one physical parameter. The fluorescence radiation is fed back to the output radiation in a regulating circuit, whose regulating parameter is a parameter for the physical parameter. This is accomplished by advancing the fluorescence radiation to a photoelectric receiver whose output signals are supplied to a voltage controlled oscillator following phase-sensitive rectification and integration. The fluorescence radiation is alternately phase-sensitively rectified only during the relaxation phase. The total durations of the different rectification periods in the two directions are identical. The alternatingly rectified signals are integrated.

FIBRE OPTIC SENSOR SYSTEM

Waveguide-containing communication and sensing systems

"FASEROPTISCHE TEMPERATURMESSANORDNUNG"

OPTISCHE TEMPERATURSENSOREN UND OPTRODEN MIT OPTISCHER TEMPERATURKOMPENSATION

Vorrichtung zur Messung der Fluoreszenz-Abklingdauer einer fluoreszierenden Substanz.

FIBRE OPTIC TEMPERATURE SENSOR

APPARATUS FOR MEASURING TEMPERATURES USING A SENSOR ELEMENT

OPTICAL TEMPERATURE MEASUREMENT TECHNIQUE UTILIZING PHOSPHORS

OPTICAL TEMPERATURE MEASUREMENT TECHNIQUE UTILIZING PHOSPHORS A technique wherein an object or environment to be measured is provided with a phosphor material layer that emits at least two optically isolatable wavelength ranges whose intensity ratio depends upon the object or environment temperature. This technique is applied to remote hostile environment point temperature measurements, such as in large enclosed electrical power transformers and other large equipment, to the measurement of surface temperatures, such as in airplane structures being tested in wind tunnels, and elsewhere.

TEMPERATURE PROBE

A temperature probe for use in a chamber. The temperature probe includes a hollow standoff mounted on a floor of the chamber, and equipped with a side-hole. The temperature probe further includes a cap fixed to the top of the standoff. The bottom surface of the cap includes a coating. The temperature probe also includes a light pipe disposed perpendicularly to the standoff and a shield disposed around the light pipe. A top surface of the cap is co-planar with a bottom surface of an object whose temperature is being measured. A sensing end of the light pipe is inserted into the side-hole of the standoff. An opening in the shield allows transmission of light between the sensing end of the light pipe and the coating. The light pipe and the shield pass through a feed-through in a sidewall of the chamber.

FIBRE OPTIC SENSOR SYSTEM

A combined pressure and temperature sensor, the sensor comprising at least one first optical sensing element of a first type and at least one second optical sensing element of a second type, wherein the sensor is adapted to compensate for temperature and/or pressure effects in the first or second optical sensing element using a response of the other of the second or first optical sensing elements.

PROBE OF MEASUREMENT COMPRISING AT LEAST A FIBEROPTIC, DEVICE OF MEASUREMENT AND INSTALLATION COMPRISING AT LEAST SUCH A PROBE

La sonde comporte au moins une fibre optique (13, 20) et un circuit électronique (12) comportant un dispositif de maintien (14) de la fibre optique en liaison optique avec des moyens convertisseurs (4, 21) de signaux. Le circuit électronique comporte un connecteur électrique amovible (15) connecté aux moyens convertisseurs de signaux tels qu'une diode électroluminescente et/ ou un photo-détecteur pour fournir ou recevoir des signaux électroniques (17, 22) utilisés par un circuit de traitement (6). Un dispositif de mesure comporte au moins une sonde à fibre optique connectée à l'aide du connecteur amovible (15) à un circuit de traitement (6). Application notamment aux sondes et aux dispositifs de mesure de température qui comportent des fibres optiques et aux installations comportant des conducteurs électriques. The probe comprises at least one optical fiber (13, 20) and an electronic circuit (12) comprising a device (14) for holding the optical fiber in optical connection with signal converter means (4, 21). The electronic circuit comprises a removable electrical connector (15) connected to the signal converting means such as a light-emitting diode and / or a photo-detector for supplying or receiving electronic signals (17, 22) used by a processing circuit (6 ). A measuring device comprises at least one fiber optic probe connected by means of the removable connector (15) to a processing circuit (6). Application in particular to probes and temperature measurement devices which include optical fibers and to installations comprising electrical conductors.

온도 프로브

... 챔버에서 사용하기 위한 온도 프로브가 개시된다. 온도 프로브는, 챔버의 바닥 상에 장착되는 사이드-홀이 구비된 중공 스탠드오프를 포함한다. 온도 프로브는, 스탠드오프의 상부에 고정되는 캡을 더 포함한다. 캡의 바닥면은 코팅을 포함한다. 온도 프로브는 또한, 스탠드오프에 수직으로 배치되는 광 파이프, 및 광 파이프 둘레에 배치되는 쉴드를 포함한다. 캡의 상면은, 온도가 측정되는 오브젝트의 바닥면과 동일-평면 상에 있다. 광 파이프의 감지 단부는 스탠드오프의 사이드-홀에 삽입된다. 쉴드의 개구는, 광 파이프의 감지 단부와 코팅 사이의 광의 송신을 허용한다. 광 파이프 및 쉴드는 챔버의 측벽에서 피드-스루를 통과한다.

TEMPERATURE SENSOR PROBE MEASURING STEADILY THE TEMPERATURE BY FIXING POWDERY FLUORESCENT SUBSTANCE AND A MANUFACTURING METHOD THEREOF

PURPOSE: A temperature sensor probe and a manufacturing method thereof are provided to maintain the constant fluorescence intensity even if the vibration is applied in the probe by fixing the fluorescent substance at a tip end of a waveguide member. CONSTITUTION: A temperature sensor probe comprises: a fluorescent material(21) mixing the fluorescent substance and transparent material; a heat actuating element(24) having a concave part(22a) in which the fluorescent material is arranged; waveguide member(23) propagating the fluorescence and excitation light generated in the fluorescent material; a protection pipe(22) covering the side of the waveguide member; and a cap comprising the heat actuating element and fixed to one end of the protection pipe. © KIPO 2009 ...

METHOD FOR DETERMINING A TEMPERATURE IN A WINDING OF SUBCONDUCTORS OF AN ELECTRIC MACHINE

The invention relates to a method for determining a temperature at a predetermined location in a winding of subconductors (2) of an electric machine, each subconductor being encased in electric subconductor insulation (3), and said method comprising the following steps: predetermining the location between one of the subconductors (2) and the associated subconductor insulation (3); arranging, in said winding, an optical fibre (5) with a sensor material piece (9) that is fixed to the predetermined location, the optical properties of said sensor material piece (9) being temperature-dependent and uninfluenced by stretching; exposing the sensor material piece (9) to light via the optical fibre (5) such that, following an interaction with the sensor material piece (9), light is emitted from said sensor material piece (9); measuring the spectrum of the light; and using this spectrum to determine the temperature at the predetermined location.

MODULAR LUMINESCENCE-BASED MEASURING SYSTEM USING FAST DIGITAL SIGNAL PROCESSING

A luminescence-based integrated optical (11) and electronic system (29, 37, 51, 55, 59) for measuring temperature or some other parameter from the decay time of a luminescent sensor (25) is disclosed. A high bandwidth, low noise amplifier (31) applies a detected decaying luminescent signal to a digital system (29, 37, 51) that acquires that signal and processes it in order to determine its decay time characteristics that are related to temperature or another parameter being measured. The digital signal processing includes use of a digital curve-fitting technique. A preferred luminescent material for temperature measurement is a chromium-doped yttrium gallium garnet material. The entire optical and electronic portions of the measuring system can be accommodated on a small single circuit card (131).

OPTIC TEMPERATURE SENSOR

An optic system (10) having a lens arrangement (38) for collimating a beam of light carried by a first array (20) of a bifurcated fiber bundle (18) to uniformly illuminate the entire surface (36) of a fluorescent material (30) to create an output signal corresponding to the temperature of the fluorescent material (30). The lens arrangement (38) focuses the output signal onto the end (34) of bifurcated fiber bundle (18) where a second array (24) communicates up to one half of the output signal generated by the glow of the fluorescent material (30) to a detector (44) which processes the output signal to inform an operator of the temperature of the fluorescent material (30).

Remote sensing of physical variables with fiber optic systems

The invention relates to methods and devices for measuring physical parameters by converting a fraction of the intensity of the interrogating light into a positive optical signal with wavelengths and/or light propagation modes different from those of the interrogating light, and having at least one characteristic which is a known function of the physical parameter being measured. The invention is adapted to the measurement of distributed forces and/or temperatures along a continuous length of optical fiber, and to the non-invasive coupling of information into an optical fiber from the side at any point or a multiplicity of points. The optical fiber is so designed that information signals coupled into it simultaneously at different points are separable at one end of the fiber and measurable without interference from each other.

Fiber optic sensing techniques in laser medicine

Methods and devices for medical treatment of biological tissue use fiber optic tips attached to the end of an optical fiber light guide for thermal treatment or photo-irradiation of said tissue, said tip including a photoluminescent material capable of acting as the tip's temperature probe. The photoluminescent material allows the tip to act as a controlled temperature surgical device or as a simple, efficient and easy to fabricate laser light diffuser.

TEMPERATURE SENSOR PROBE AND MANUFACTURING METHOD OF THE SAME

To provide a temperature sensor probe that can conduct stable measurements, and the manufacturing method of the same. The temperature sensor probe related to the present invention provides: a fluorescent material that is a mixture of a fluorescent substance and a transparent material; a thermosensitive part having a concave part in which the fluorescent material is arranged; a waveguide route rod that propagates excitation light, which is irradiated on the fluorescent material, and fluorescent light, which is produced by the fluorescent substance; and a protective tube that covers the side surfaces of the waveguide route rod. Then, the fluorescent material is affixed to the tip of the waveguide route rod using the transparent material, and the waveguide route rod bites into the fluorescent material.

Photo-detection device and temperature distribution detection device using the same

A photo-detection device comprising a base plate made of an insulation material and having a plurality of through holes formed in the base plate at a substantially equal distance, a plurality of optical fibers each having one end including a light receiving section from an object to be detected inserted and fixed to the respective through holes and another end provided with a light output section, and a light detection section connected to the light output section.

Single-use catheter with thermo-optical temp. sensor - in fluorescent-crystal form glued into side recess and in contact with optical fibre

A temp. sensor (19) in thermal contact with the surroundings is integrated in a flexible catheter (10). An optical fibre (22) passing through the latter has one end in contact with the sensor and the other end connectable to a pulse-driven light source and an evaluator contg. a photo detector. The temp. sensor is of fluorescent crystal, pref. in powder from emedded in a binder matrix. The sensor is held in a recess (18) by an optically transparent, heat-conductive glue (20). It is coupled to the optical fibre via the latter. USE/ADVANTAGE - monitoring patients circulation in intensive care medicine. Simply and cheaply produced for single use.

Vorrichtung zur optischen Messung von Kryogentemperaturen

Faseroptischer Drei-Parameter Sensor und System.

Messsensor mit wenigstens einem optischen Fiber, Messvorrichtung und Messsystem mit wenigstens so einem Sensor

OPTICAL TEMPERATURE SENSING MEANS

Temperature measurement of fiber optics by means of thermal induced fluorescence

A method for temperature measurement includes measuring intensities of two adjacent wavelengths emitted from a heated optical fiber and calculating the thermal population distribution between associated energy levels.

TEMPERATURE SENSING SYSTEM

OPTICAL TEMPERATURE SENSORS AND OPTRODEN WITH OPTICAL TEMPERATURE COMPENSATION

Method for producing fibre optic sensor for detection and monitoring of temperature

FIBER OPTIC THERMAL ANEMOMETER

Abstract To measure the heat transfer coefficient of a sample, an element with temperature sensitive optical properties is placed in contact or implanted in the sample. The element is heated or cooled. The temper-ature difference between the element and the unheated sample and the rate of heating or cooling indicate the heat transfer coefficient of the sample. In one embo-diment, the element is heated or cooled at a constant rate. The heat transfer coefficient of the sample is then inversely related to the difference in temperature between the element and the unheated sample. Alter-natively, the element may be heated or cooled at such a rate that the temperature difference between the element and the unheated sample remains substantially constant. The heat transfer coefficient of the sample then varies directly with the rate of heating or cooling. The heat transfer coefficient of a sample is a measure of its composition and other physical properties. The compo-sition of gasses, liquids, the presence of bubbles in a liquid, and fluid levels can be detected by the optical technique. Pressure and flow rates of fluids can also be detected. The technique can be used also to more accurately measure the thermal conductivity and temper-ature of small objects with small heat capacities.

FIBER OPTIC SENSING SYSTEM

The invention provides a fiber optic sensing system for use in environments hostile to electronics. The system comprises an optical module comprising a light source and a photodetector, a probe comprising a glass optical fiber core, preferably with a transducer sensitive to the measurement parameter coupled thereto, an extension comprising a plastic optical fiber core, a first connector configured to optically couple the extension to the probe and a second connector configured to optically couple the extension to the optical module. Light emitted from the light source is transmitted to the transducer on the probe and returned to the photodetector by the extension.

FIBER OPTIC THERMAL ANEMOMETER

Temperature sensor probe

To provide a temperature sensor probe that can take stable measurements. The temperature sensor probe related to the present invention is a temperature sensor probe for measuring temperature using a fluorescent substance that changes fluorescent characteristics depending on temperature. Then, a powdered fluorescent substance, a guide wave route member that propagates excitation light, which is irradiated on the fluorescent substance, and fluorescent light, which is produced by the fluorescent substance, are provided. Further, the particle size of the powdered fluorescent substance is confined to the range of 60 to 100 mum.

PROCESS AND DEVICE TO REMOTELY MEASURE the DISTRIBUTION Of a PHYSICOCHEMICAL PARAMETER IN a MEDIUM

FIBRE OPTIC SENSOR SYSTEM

A combined pressure and temperature sensor, the sensor comprising at least one first optical sensing element of a first type and at least one second optical sensing element of a second type, wherein the sensor is adapted to compensate for temperature and/or pressure effects in the first or second optical sensing element using a response of the other of the second or first optical sensing elements.

FIBER OPTIC SENSOR SYSTEM

A fiber optic system (10, 210) including a plurality of optical sensors, each with an identification system (20, 120, 220, 320). The fiber optic system (10) includes a fiber (12, 112) extending a distance, a demodulator (14), and at least one coupler (16, 116), optical sensor (18, 118) and corresponding identification system (20, 120). The identification system (20, 120) is powered by light shunted from the fiber (12, 112) by the coupler (16, 116) to a modulating device (24, 124). The modulating device (24, 124) modulates the light and transmits it to a power converting device (16, 116), which transforms the light energy into electrical energy. The electrical energy powers a high temperature integrated circuit (28, 128) upon which is stored a digital identification of a respective optical sensor (18, 118). The integrated circuit (28, 128), upon being powered up, sends a modulated response (30, 130) back up to the surface through the modulating device (24, 124). Alternatively, a passive ...

Fiber Optic Temperature Probe

There is provided a fiber optic temperature probe having a base, a first tube connected to the base, a second tube provided coaxially within the first tube, a probe tip extending through an opening in a distal end of the first tube; and an optical fiber extending from within the base through an opening in the proximal end of the first tube and being substantially coaxial with respect to the first tube. There is also provided a fiber optic temperature probe having a base, a first tube connected to the base, a probe tip extending through an opening in a distal end of the first tube, an optical fiber extending from within the base through an opening in the proximal end of the first tube and being substantially coaxial with respect to the first tube, and a first lens positioned between the probe tip and the optical fiber.

Lens system for optic temperature sensor

An optic system (10) having a lens arrangement (38) for collimating a beam of light carried by a first array (20) of a bifurcated fiber bundle (18) to uniformly illuminate the entire surface (36) of a fluorescent material (30) to create an output signal corresponding to the temperature of the fluorescent material (30). The lens arrangement (38) focuses the output signal onto the end (34) of bifurcated fiber bundle (18) where a second array (24) communicates up to one half of the output signal generated by the glow of the fluorescent material (30) to a detector (44) which processes the output signal to inform an operator of the temperature of the fluorescent material (30).

Cardiac blood flow sensor and method

A cardiac blood flow sensor includes a light source and a photodetector within a housing. The light source projects a beam through a fiber optic line having a first end optically connected to the housing and a distal tip positioned within the patient's heart. A ruby positioned at the distal tip is heated by the beam, and fluoresces for a period of time after illumination ceases. The period of time depends on the temperature of the ruby, so that the fluorescent light is transmitted back through the optic line to the photodetector. The signal generated by the photodetector may be analyzed to estimate the blood flow rate, due to the thermal effect of blood flowing past the heated ruby. The flow sensor may be contained in a common housing with a defibrillator that is implanted in a patient. The sensor may remain inactive until a tachycardia or rapid heart rate is detected, upon which the light source is activated. The cardiac condition is analyzed based on the detected heart rate and blood ...

Photoluminescence built-in-test for optical systems

A built-in-test capability is provided for determining the integrity of an optical fiber connecting: (a) an optical firing unit having a primary light source emitting a first wavelength, a test light source emitting a second wavelength different from the first wavelength, a mechanism both for coupling light from the light sources to the optical fiber and also for coupling the return light to a detector; and (b) an optically-initiated device which is coupled to a second end of the optical fiber. The apparatus includes a photoluminescent material disposed at a junction of the optically-initiated device and the second end of the optical fiber. In test mode, this photoluminescent material is exposed to the test light source, which results in photoluminescence at a third wavelength. The photoluminescent light travels through the optical fiber to the detector, and when detected indicates optical fiber continuity. The present system can also measure the temperature at the distal end of the optical ...

Optical temperature measurement technique utilizing phosphors

A technique wherein an object or environment to be measured is provided with a phosphor material layer that emits at least two optically isolatable wavelength ranges whose intensity ratio depends upon the object or environment temperature. This technique is applied to remote hostile environment point temperature measurements, such as in large enclosed electrical power transformers and other large equipment, to the measurement of surface temperatures, such as in airplane structures being tested in wind tunnels, and elsewhere.

TEMPERATURE SENSING DEVICE FOR A HIGH VOLTAGE DISCONNECTING SWITCH AND HIGH VOLTAGE DISCONNECTING SWITCH INCLUDING A TEMPERATURE SENSING DEVICE

A sensing device for a high voltage disconnecting switch comprises a light emitting element, which is configured to align its temperature with a temperature of the high voltage disconnecting switch, and an optical fiber, which is configured to receive a light emission from the light emitting element and configured to guide the light emission. Further, a deriving unit is configured to receive the light emission from the optical fiber and derive information about the temperature of the high voltage disconnecting switch based on a duration of the received light emission.

TEMPERATURE MEASUREMENT APPARATUS, MOUNTING PLATFORM STRUCTURE HAVING THE SAME, AND HEAT TREATMENT APPARATUS

PROBLEM TO BE SOLVED: To provide a temperature measurement apparatus preventing a metal contamination, and drastically improving the measurement accuracy of a temperature, by placing a diffraction grating in an measuring object. SOLUTION: The temperature measurement apparatus 50 for measuring the temperature of the measuring object 42 comprises: the diffraction grating 68 formed in the measuring object; a light emitting section 75 for generating a measurement light L1 for measuring the temperature; a first optical waveguide 70A-1(70) for guiding the measurement light to the diffraction grating; a second optical waveguide 70A-2(70) for guiding a diffraction light from the diffraction grating; a frequency analysis section 78 for receiving the diffraction light guided by the second light waveguide, and analyzing a frequency; and a temperature analysis section 80 for obtaining the temperature of the measuring object, based on an output from the frequency analysis section. COPYRIGHT: (C)2010 ...

Optische Temperatursensoren und Optroden mit optischer Temperaturkompensation

The invention relates to a device for temperature compensated determination of chemical parameters. Said device comprises an optical temperature sensor which contains a temperature indicator with a temperature-related decay time and/or intensity of the luminescence in a form inert in relation to the surrounding medium. It also contains a chemical sensor which contains an indicator sensitive to a chemical parameter, means for luminescence excitation of the temperature indicator and the chemical indicator, means for measuring the luminescence of the temperature indicator and the chemical indicator, means for optical connection between the indicator, excitation means and measuring means, and means for detecting luminescence rays.

Fluorescence based thermometry

A temperature sensor includes a photon source, a fluorescent element and a photodetector. The fluorescent element includes a temperature-insensitive first fluorophore and a temperature-sensitive second fluorophore. The photodetector includes a first photosensor exhibiting a first spectral responsivity and a second photosensor exhibiting a second spectral responsivity. The first fluorophore may be selected to optimize the first spectral responsivity and the second fluorophore may be selected to optimize the second spectral responsivity. To measure a temperature of a surface, the fluorescent element may be placed adjacent to the surface and irradiated with a photon beam. First photons emitted from the first fluorophore and second photons emitted from the second fluorophore are collected. The first and second photons may be transmitted as a single dichromatic beam to a photodetector that includes two photosensors having different respective spectral responsivities such that the two photosensors generate two different electrical output signals, the ratio of which may be correlated to temperature.

A sensor for measuring a flow of a fluid

A sensor is provided for measuring a flow of a fluid in a physiological environment, such as within a vessel of a human or animal subject. The sensor comprises an interrogation light guide extending from a proximal end to a distal end of the sensor. The interrogation light guide is configured to transmit interrogation light to, and receive reflected interrogation light from, the distal end of the sensor. The sensor further comprises an excitation light guide configured to transmit excitation light to the distal end of the sensor. The excitation light is provided for heating the fluid (directly or indirectly). The sensor further comprises a sensing element located at the distal end of the sensor. The sensing element comprises at least two etalons for reflecting interrogation light back along the interrogation light guide towards the proximal end of the sensor. Each etalon has a respective optical path length and further has at least one reflective surface external to the interrogation light guide. The sensing element is configured to be in thermal contact with the fluid such that the optical path length of at least one etalon is dependent on a temperature of the fluid. The reflected interrogation light forms an interferogram which is dependent on the optical path lengths of the respective etalons.

Optoelectronic transducer module for thermographic temperature measurements

Examples of a optoelectronic transducer module with integrated signal processing for use in thermographic temperature measurement are disclosed. The module includes a light source to provide an excitation light, an optical element to couple the light to an optical port, a connector configured to connect the optoelectronic transducer module to a fiber optic sensor, a detector coupled to the optical port to detect an emitted light from the fiber optic sensor and convert the detected emitted light into an electrical signal, a module processing unit coupled to the light source and the detector configured to convert the electrical signal into a set of digital results, a high speed circuitry in communication with an external processing unit for data aggregation and a low speed circuitry in communication with the external processing unit for configuration and firmware upgrade in the module.

Phosphor Thermometry Fiber Sensor

High precision phosphor temperature sensors are disclosed. The sensors include a light source that emits an excitation light through one or more optical fibers to one or more phosphors that produce fluorescent emission(s) when engaged by the excitation light. The fluorescent emission(s) is transmitted optically from the phosphor(s) directly to a detector or an optical diffraction grating before the light is received at a detector. The detector is linked to a controller, which measures the lifetime(s) of the fluorescent emission(s) and calculates the temperature at the phosphor(s) from said lifetime(s). 1. A temperature sensor comprising:a light source optically coupled to at least one phosphor, the light source emitting an excitation light onto the at least one phosphor, the at least one phosphor producing at least one fluorescent emission when engaged by the excitation light;the at least one phosphor being optically coupled to a detector; andthe detector being linked to a controller having a memory programmed to calculate temperature from at least one lifetime of the at least one fluorescent emission.2. The temperature sensor of wherein the at least one phosphor is optically coupled to the light source by at least one optical fiber claim 1 , and wherein the at least one phosphor and at least one optical fiber are coated with an opaque material.3. The temperature sensor of wherein the light source is an ultra-violet light source.4. The temperature sensor of wherein the detector is a photo detector.5. The temperature sensor of wherein the light source is optically coupled to a first optical fiber;the first optical fiber being connected to a second optical fiber and a third optical fiber at a coupler;the second optical fiber connecting the coupler to a detector;the third optical fiber connecting the coupler to a sensing end of the third optical fiber that is coated with the at least one phosphor; andthe third optical fiber transmitting at least one fluorescent ...

Radio Frequency Heating System with Temperature Measuring Component Based on Fluorescence

A radio frequency heating system includes a radio frequency heating chamber, a fluorescence temperature measuring transmitter, and a central control unit connected to the fluorescence temperature measuring transmitter. A radio frequency heating container is arranged at the bottom of the radio frequency heating chamber. The radio frequency heating container comprises a fluorescent material with temperature-sensitive fluorescent characteristics, which is excitable by excitation light to produce fluorescence. A light path is provided between the radio frequency heating container and the fluorescence temperature measuring transmitter. The fluorescence temperature measuring transmitter includes a light emitting device for generating excitation light and a driving circuit thereof, a photoelectric converter device for receiving fluorescence, and a signal processing and output circuit for processing output signals of the photoelectric converter device. 1. A radio frequency heating system comprising:a radio frequency heating chamber,a fluorescence temperature measuring transmitter, anda central control unit, said central control unit is connected to said fluorescence thermometer transmitter, wherein: said radio frequency heating container is disposed at the bottom of said radio frequency heating chamber, said radio frequency heating container comprises a fluorescent material having temperature sensitive fluorescent characteristics, said fluorescent material is excitable by excitation light to generate fluorescence, and there is a working optical path between said RF heating container and said fluorescent temperature measuring transmitter,said fluorescence temperature measuring transmitter comprises a light emitting device for generating the excitation light and a driving circuit thereof, an optoelectronic converter component for receiving said fluorescence, and a signal processing output circuit for processing output signals of the optoelectronic converter component, andsaid ...

Temperature sensor

A temperature sensor includes a sensing member, a retention member configured to secure the sensing member, an optical fiber configured to irradiate the sensing member with light and guide the light reflected from the sensing member, and a cylindrical sleeve configured to accommodate the optical fiber. The retention member is a plate-shaped component and has a cut-out portion formed on at least one of a peripheral portion of a non-retention surface of the retention member opposite to a retention surface to which the sensing member is secured and a side surface of the retention member. The retention member is secured to a tip of the sleeve so that the non-retention surface is exposed to the outside, and the tip of the sleeve is engaged with the cut-out portion.

MULTI-FIBER OPTIC SENSING SYSTEM

A fiber optic sensing system includes a plurality of optical probes, a light source, and a light splitting unit connecting the light source to the plurality of optical probes. The light splitting unit splits a light emitted from the light source into a plurality of divided lights, the divided lights being transmitted to the plurality of optical probes. 1. A fiber optic sensing system comprising:a plurality of optical probes;a light source; anda light splitting unit connecting the light source to the plurality of optical probes,wherein the light splitting unit splits a light emitted from the light source into a plurality of divided lights, the divided lights being transmitted to the plurality of optical probes.2. The fiber optic sensing system according to claim 1 , wherein the light splitting unit includes at least two groups of light splitters.3. The fiber optic sensing system according to claim 2 , wherein the light splitting unit includes a first group of splitter connected to the light source claim 2 , and a second group of splitters disposed between the first group of splitter and the optical probes.4. The fiber optic sensing system according to claim 2 , wherein the first group of splitter includes a primary splitter for splitting a light emitted from the light source into a first divided light and a second divided light.5. The fiber optic sensing system according to claim 4 , wherein the second group of splitters include two secondary light splitters for splitting the first and second divided lights into two third divided lights and two fourth divided lights claim 4 , respectively.6. The fiber optic sensing system according to claim 1 , wherein the light splitting unit includes n groups of light splitters for splitting the light from the light source into 2divided lights for used with 2optical probes claim 1 , wherein n is a natural number.7. The fiber optic sensing system according to claim 6 , wherein the first group of light splitter is directly connected ...

Methods and Devices for Standoff Differential Raman Spectroscopy with Increased Eye Safety and Decreased Risk of Explosion

A compact, portable Raman spectrometer makes fast, sensitive standoff measurements at little to no risk of eye injury or igniting the materials being probed. This spectrometer uses differential Raman spectroscopy and ambient light measurements to measure point-and-shoot Raman signatures of dark or highly fluorescent materials at distances of 1 cm to 10 m or more. It scans the Raman pump beam(s) across the sample to reduce the risk of unduly heating or igniting the sample. Beam scanning also transforms the spectrometer into an instrument with a lower effective safety classification, reducing the risk of eye injury. The spectrometer's long standoff range automatic focusing make it easier to identify chemicals through clear and translucent obstacles, such as flow tubes, windows, and containers. And the spectrometer's components are light and small enough to be packaged in a handheld housing or housing suitable for a small robot to carry. 1. A method of Raman spectroscopy of a sample , the method comprising:measuring a range of between about 2 centimeters and 400 centimeters from a Raman spectroscopy system to the sample;automatically focusing a Raman pump beam emitted by the Raman spectroscopy system based on the range from the Raman spectroscopy system to the sample;detecting a Raman signal from the sample in response to the Raman pump beam; andestimating a Raman signature of the sample based on the Raman signal.2. The method of claim 1 , wherein measuring the range from the Raman spectroscopy system to the sample comprises:illuminating the sample with a beam propagating along an optical axis of a telescope of the Raman spectroscopy system to form a spot on the sample;detecting the position of spot with a camera that is in optical communication with the spot and that is not located on the optical axis of the telescope;calculating the range based on the position of the image of the spot formed on the camera.3. The method of claim 1 , wherein measuring the range from ...

Method and apparatus for measuring a distributed physical value of an optical device under test

A method for measuring a distributed physical value of an optical device under test (DUT), includes the steps of: launching into the DUT a probe signal that includes a plurality of optical pulses at at least one test wavelength, and receiving at least one optical signal backscattered by the DUT, wherein the optical pulses are obtained with at least the following steps: generating a first time sequence of first pulses that corresponds to a word of a first code, the first time sequence lasting not shorter than a time of flight and being formed by a number of time slots that is equal to the number of bits of the word of the first code; generating a second time sequence of second pulses that corresponds to a word of a second code; and amplitude modulating the second time sequence with the first time sequence.

GAS TEMPERATURE SENSOR WITH THERMALLY LUMINESCENT COMPOUNDS

A thermally luminescent temperature sensor with a rare earth emitter having a first selective electromagnetic light energy emission band and a second selective electromagnetic light energy emission band in which the rare earth emitter converts thermal energy to electromagnetic light energy within the first and second selective energy emission bands. The sensor also has a selective optical detector in optical communication with the rare earth emitter, wherein the selective optical detector independently detects each the first and second selective electromagnetic light energy emission bands. Lastly, the thermally luminescent temperature sensor determines the temperature based on the electromagnetic light energy measured within the first and second selective energy emission bands relative to each other. Optionally additional emission bands may be used in the evaluation of the temperature.

Bladder temperature measurement for high intensity focused ultrasound

The invention provides for a medical instrument ( 100 ) comprising: a high intensity focused ultrasound system ( 122 ) for sonicating a target region ( 139 ) within a subject ( 118 ); a light source ( 158 ) for exciting a temperature sensitive fluorescent dye, wherein the light source is configured for coupling to an optical fiber cable ( 148 ) of a urinary catheter ( 140 ); a light source ( 160 ) for measuring fluorescence ( 190 ) emitted by the temperature sensitive fluorescent dye, wherein the light source is configured for coupling to the optical fiber cable; a memory ( 178 ) for storing machine executable instructions ( 180 ); and a processor ( 174 ) for controlling the medical instrument. Execution of the machine executable instructions cause the processor to: receive ( 200 ) a sonication plan ( 188 ) descriptive of a sonication of the target region; measure ( 202 ) the fluorescence using the light sensor; calculate ( 204 ) a bladder temperature ( 192 ) using the fluorescence; and generate ( 206 ) sonication commands ( 194 ) using the sonication plan and the bladder temperature, wherein the sonication commands are adapted for controlling the high intensity focused ultrasound system to sonicate the target region.

Methods and Devices for Standoff Differential Raman Spectroscopy with Increased Eye Safety and Decreased Risk of Explosion

A compact, portable Raman spectrometer makes fast, sensitive standoff measurements at little to no risk of eye injury or igniting the materials being probed. This spectrometer uses differential Raman spectroscopy and ambient light measurements to measure point-and-shoot Raman signatures of dark or highly fluorescent materials at distances of 1 cm to 10 m or more. It scans the Raman pump beam(s) across the sample to reduce the risk of unduly heating or igniting the sample. Beam scanning also transforms the spectrometer into an instrument with a lower effective safety classification, reducing the risk of eye injury. The spectrometer's long standoff range automatic focusing make it easier to identify chemicals through clear and translucent obstacles, such as flow tubes, windows, and containers. And the spectrometer's components are light and small enough to be packaged in a handheld housing or housing suitable for a small robot to carry. 1. A method of Raman spectroscopy , the method comprising:acquiring interleaved measurements of a first Raman signal of a sample using a Raman pump beam at a first wavelength, a second Raman signal of the sample using a Raman pump beam at a second wavelength different than the first wavelength, and ambient light transmitted and/or scattered by the sample; andgenerating a post-processed signature based on the interleaved measurements of the first Raman signal, the second Raman signal, and the ambient light, measuring the first Raman signal over first measurement periods equal to a first integer multiple of a base period;', 'measuring the second Raman signal over second measurement periods equal to a second integer multiple of the base period; and', 'measuring the ambient light over third measurement periods equal to a third integer multiple of the base period., 'wherein acquiring the interleaved measurements comprises2. The method of claim 1 , wherein generating the post-processed signature comprises determining a difference between the ...

Methods and Devices for Standoff Differential Raman Spectroscopy with Increased Eye Safety and Decreased Risk of Explosion

A compact, portable Raman spectrometer makes fast, sensitive standoff measurements at little to no risk of eye injury or igniting the materials being probed. This spectrometer uses differential Raman spectroscopy and ambient light measurements to measure point-and-shoot Raman signatures of dark or highly fluorescent materials at distances of 1 cm to 10 m or more. It scans the Raman pump beam(s) across the sample to reduce the risk of unduly heating or igniting the sample. Beam scanning also transforms the spectrometer into an instrument with a lower effective safety classification, reducing the risk of eye injury. The spectrometer's long standoff range automatic focusing make it easier to identify chemicals through clear and translucent obstacles, such as flow tubes, windows, and containers. And the spectrometer's components are light and small enough to be packaged in a handheld housing or housing suitable for a small robot to carry. 1. A method of Raman spectroscopy , the method comprising:projecting a first Raman pump beam at a first wavelength onto a sample from a standoff distance of at least 10 centimeters;detecting a first Raman signal emitted by the sample in response to the first Raman pump beam, the first Raman signal representing a first Raman signature and a first background signature;projecting a second Raman pump beam at a second wavelength different than the first wavelength onto the sample from the standoff distance;detecting a second Raman signal emitted by the sample in response to the second Raman pump beam, the second Raman signal representing a second Raman signature and a second background signature; andgenerating a post-processed signature based on at least one of the first Raman signal or the second Raman signal, the post-processed signature having a background lower than or equal to the first background signature.2. The method of claim 1 , wherein generating the post-processed signature comprises determining a difference between the first ...

In situ optical surface temperature measuring techniques and devices

A temperature sensor that has a thermally conducting contact with a surface that emits electromagnetic radiation in proportion to the temperature of the contact is disclosed. The sensor has a resilient member attached to the contact and configured to extend the contact toward the object to be measured. A first light waveguide is attached to the contact and is configured to transmit the electromagnetic radiation from the contact. The sensor has a guide with a bore formed therein that the first waveguide is insertable into. When the contact is moved, the first waveguide moves within the bore. A second waveguide is attached to the guide such that a variable gap is formed between the ends of the first waveguide and the second waveguide. Electromagnetic energy from the first waveguide traverses the gap and can be transmitted by the second waveguide. The guide allows the first waveguide to move with the contact in order to ensure that the contact is fully engaged with the surface of the object.

Thermally Compensated Dual-Probe Fluorescence Decay Rate Temperature Sensor and Method of Use

The present invention provides a dual-probe thermally compensated fluorescence decay rate temperature sensor capable of measuring the true temperature of a sample surface and its associated method of use.

Thermally compensated dual-probe fluorescence decay rate temperature sensor and method of use

The present invention provides a dual-probe thermally compensated fluorescence decay rate temperature sensor capable of measuring the true temperature of a sample surface and its associated method of use.

Three-parameter optical fiber sensor and system

A single sensor is provided as part of a fiberoptic probe to measure up to three parameters, namely pressure (or force or displacement), temperature, and heat flow or fluid velocity. A solid elastomeric optical element is formed at the end of optical fiber transmission medium, and adjacent light reflective and temperature dependent materials are formed on the resulting convex surface of the optical element. The amount of light reflected is proportional to the force or pressure against the element. The temperature dependent material is preferably a luminescent material. Over the luminescent material is formed a layer of material that is absorptive of infrared radiation, thereby allowing a determination of characteristics of heat or fluid flow by measuring the rate at which heat is carried away from the infrared heated layer. The sensor can be formed at the end of a single optical fiber, thereby having extensive applications where a very small sensor is required. One such application is a medical or clinical one, where the sensor is mounted in a catheter for providing pressure, flow and temperature of the blood in a blood vessel.

Optical-fibre sensor for measuring physical quantities

Faseroptischer Sensor zur Messung physikalischer Größen, z. B. einer Temperatur, einer Lage, einer Kraft, eines Niveaus, eines Druckes, eines Flusses, einer Beschleunigung, einer magnetischen Feldstärke, einer elektrischen Feldstärke oder einer mechanischen Verformung, wobei der Sensor lumineszierendes Material enthält, das aus atomar verteilten Lumineszenzzentren (1) besteht, die in fester Lösung in einem amorphen oder monokristallinen Trägermaterial (2, 4) enthalten sind. Fiber optic sensor for measuring physical quantities, e.g. B. a temperature, a position, a force, a level, a pressure, a flow, an acceleration, a magnetic field strength, an electrical field strength or a mechanical deformation, wherein the sensor contains luminescent material consisting of atomically distributed luminescent centers (1) exists, which are contained in a solid solution in an amorphous or monocrystalline support material (2, 4).

FIBER OPTICAL TEMPERATURE MEASURING DEVICE

Temperature measuring apparatus

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Optical fiber bending sensor

The present invention relates to an optical bending sensor using optical sensor with a shielding layer structure and an optical fiber Bragg grating. The present invention provides the optical fiber bending sensor comprises a transformation part to which an external force is applied; and an optical fiber grating separated from the transformation part. The transformation part and the optical fiber grating are made from optical fiber with a shielding layer structure. Also the optical fiber with the shielding layer structure includes a core; a shielding layer formed on the outer side of the core; and a cladding layer formed on the outer side of the shielding layer. A refractive index of the core is bigger than that of the cladding layer and a refractive index of the shielding layer is smaller than that of the cladding layer.

Apparatus for measuring temperature and thermal energy

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Methods and devices for the optical measurement of temperature with luminescent materials

The present invention provides new methods and their associated materials and devices for the remote optical measurements of temperatures with luminescent sensors. These methods allow the use of a single sensor to measure temperatures over a wide range from the cryogenic regions to well above ambient temperatures, up to about 800 K depending on the sensor. Using fiber optic links a single, inexpensive light source, for example a light emitting diode, and a single photodetector are used to obtain normalized measurements from a sensor, only minimally affected by fluctuations in the intensity of the excitation light source, fiber and/or connector losses or detector drift. One preferred embodiment of this invention can be used with most luminescent materials and does not require a temperature-dependent change in the luminescence properties of the sensor within the temperature range being measured. Another preferreed embodiment uses temperature-dependent luminescence decay times as temperature indicators, using a class of materials the luminescence quantum efficiency of which does not degrade within the temperature range being measured. The invention permits the use of a single sensor in two independent operative modes, thus providing redundancy and a self-checking feature.

Methods and devices for standoff differential Raman spectroscopy with increased eye safety and decreased risk of explosion

A compact, portable Raman spectrometer makes fast, sensitive standoff measurements at little to no risk of eye injury or igniting the materials being probed. This spectrometer uses differential Raman spectroscopy and ambient light measurements to measure point-and-shoot Raman signatures of dark or highly fluorescent materials at distances of 1 cm to 10 m or more. It scans the Raman pump beam(s) across the sample to reduce the risk of unduly heating or igniting the sample. Beam scanning also transforms the spectrometer into an instrument with a lower effective safety classification, reducing the risk of eye injury. The spectrometer's long standoff range automatic focusing make it easier to identify chemicals through clear and translucent obstacles, such as flow tubes, windows, and containers. And the spectrometer's components are light and small enough to be packaged in a handheld housing or housing suitable for a small robot to carry.

Method of operating blast furnace

용선을 제조하는 고로의 조업방법은, 금속관으로 피복된 광 화이버를 준비하는 공정, 고로의 출선구에서 배출된 용선흐름의 온도를 상기 금속관으로 피복된 광 화이버를 이용 측정하여 용선온도정보를 얻는 공정과 얻어진 용선온도정보에 근거하여 고로의 로의 열을 제어하는 공정으로 이루어진다. The operation method of the blast furnace manufacturing molten iron, the process of preparing the optical fiber coated with a metal tube, the process of obtaining the molten iron temperature information by measuring the temperature of the molten iron flow discharged from the outlet of the blast furnace using the optical fiber coated with the metal tube And controlling the heat of the blast furnace furnace based on the obtained molten iron temperature information. 로의 열의 제어는 로의 열 추정모델을 이용하여 로의 열 레벨 및 로의 열추이를 추정함으로써 행하여진다. The row control of the furnace is performed by estimating the row level and the row trend of the furnace using the furnace thermal estimation model.

DEVICE AND METHOD FOR THE OPTICAL DETERMINATION OF TEMPERATURE USING A PHOSPHORESCENT MATERIAL

Photoluminescent temperature sensor utilizing a singular element for excitation and photodetection

A photoluminescent temperature sensing system and method utilizes a single semi-conductor optical device adapted to operate as both a light-emitting device and a light detection device, a photoluminescent material, and a processor operatively connected to the driving circuit and configured to execute a method comprising the steps of driving the optical device to emit a pulse of incident light, producing photoluminescent light, receiving the photoluminescent light with the optical device, and creating signal information associated with a temperature-dependent characteristic of the photoluminescent light, and deriving temperature information from the signal information.

OPTICAL FIBER TEMPERATURE MEASURING DEVICE

L'INVENTION CONCERNE LES MESURES DE TEMPERATURE. UN DISPOSITIF DE MESURE DE TEMPERATURE UTILISE LA PHOTOLUMINESCENCE D'UNE MATIERE A L'ETAT SOLIDE QUI EST SOUMISE A LA TEMPERATURE A MESURER. CETTE MATIERE EST DISPOSEE DANS PLUSIEURS CAPTEURS 9-15 SITUES A DIVERS EMPLACEMENTS ET CHAQUE CAPTEUR EST RELIE A UNE DIODE ELECTROLUMINESCENTE 2, 3, 30-32 PAR AU MOINS UNE FIBRE OPTIQUE 5, 6. LA LUMIERE DE LUMINESCENCE EMISE PAR LES CAPTEURS EST TRANSMISE PAR DES FIBRES OPTIQUES VERS UN RECEPTEUR COMMUN 16 ASSOCIE A UNE UNITE DE MESURE. APPLICATION AUX MESURES DE TEMPERATURE DANS LES MACHINES ELECTRIQUES. THE INVENTION RELATES TO TEMPERATURE MEASUREMENTS. A TEMPERATURE MEASURING DEVICE USES THE PHOTOLUMINESCENCE OF A MATTER IN A SOLID STATE WHICH IS SUBJECT TO THE TEMPERATURE TO BE MEASURED. THIS MATERIAL IS ARRANGED IN SEVERAL 9-15 SENSORS LOCATED AT VARIOUS LOCATIONS AND EACH SENSOR IS CONNECTED TO A 2, 3, 30-32 LIGHT DIODE BY AT LEAST ONE 5, 6 OPTICAL FIBER. THE LUMINESCENT LIGHT EMITTED BY THE SENSORS IS TRANSMITTED BY OPTICAL FIBERS TOWARDS A COMMON RECEIVER 16 ASSOCIATED WITH A UNIT OF MEASUREMENT. APPLICATION TO TEMPERATURE MEASUREMENTS IN ELECTRIC MACHINES.

Multi-fiber detection system

Patent FR2484639B1

Temperature sensor and temperature measuring method

A temperature sensor for measuring temperature in accordance with a time-of-life of a fluorescent light that is produced by a fluorescent material, and is provided with a light source for imaging an excitation light, a fluorescent material for producing fluorescent light by the excitation light, a photoreceptor element for detecting the fluorescent light and outputting a fluorescent light signal in accordance with the fluorescent light intensity, and a signal processing circuit for calculating a temperature based on the fluorescent light signal from the photoreceptor element, where the signal processing circuit calculates integral values for the fluorescent light signals in the respective intervals A through C that have identical time durations, and then, based on the integral values, for two intervals, calculates a difference value, and then calculates a ratio of two difference values, to be a variable that varies in accordance with the temperature, and then references the relationship between the temperature and the ratio between difference values, stored in advance, to convert the calculated variable into the temperature.

Remote temperature sensing of small volume and related apparatus thereof

Multi-fiber optic sensing system

一光纖感測系統包括多個光學探針、一光源、及將該光源連接到該等多個光學探針的一分光單元。此分光單元將從該光源發射的一光分成多道分光，該等分光被傳送至該等多個光學探針。

Patent JPH033171B2

System and method of measuring and controlling temperature of optical fiber tip in a laser system

A system and method of sensing temperature at an optical fiber tip, including the steps of positioning a slug of fluorescent material adjacent the optical fiber tip, providing an optical stimulus having a wavelength within a first predetermined range through at least one fiber optically linked to the optical fiber tip, wherein a desired optical fluorescent response having a wavelength within a second predetermined range from the fluorescent slug is generated, detecting a signal representative of the optical stimulus, detecting a signal representative of the optical fluorescent response, digitally processing the optical stimulus signal and the optical fluorescent response signal to determine a phase difference therebetween, and calculating a temperature for the optical fiber tip as a function of the phase difference. The phase difference between the optical stimulus signal and the optical fluorescent response signal may be determined directly or indirectly as a function of the phase difference between a reference signal and the optical stimulus signal and the phase difference between the reference signal and the optical fluorescent response signal.

Fiber optic thermal anemometer

To measure the heat transfer coefficient of a sample, an element with temperature sensitive optical properties is placed in contact or implanted in the sample. The element is heated or cooled. The temperature difference between the element and the unheated sample and the rate of heating or cooling indicate the heat transfer coefficient of the sample. In one embodiment, the element is heated or cooled at a constant rate. The heat transfer coefficient of the sample is then inversely related to the difference in temperature between the element and the unheated sample. Alternatively, the element may be heated or cooled at such a rate that the temperature difference between the element and the unheated sample remains substantially constant. The heat transfer coefficient of the sample then varies directly with the rate of heating or cooling. The heat transfer coefficient of a sample is a measure of its composition and other physical properties. The composition of gasses, liquids, the presence of bubbles in a liquid, and fluid levels can be detected by the optical technique. Pressure and flow rates of fluids can also be detected. The technique can be used also to more accurately measure the thermal conductivity and temperature of small objects with small heat capacities.

Temperature sensor and temperature measuring method

本发明提供一种温度传感器及温度测定方法，该温度传感器及温度测定方法能够以高响应速度进行准确测量。本发明的温度传感器是一种根据荧光材料(21)产生的荧光的寿命测定温度的温度传感器，其具有：射出激发光的光源(12)、通过激发光产生荧光的荧光材料(21)、检测荧光并输出与荧光强度对应的荧光信号的受光元件(13)、以及基于来自受光元件(13)的荧光信号算出温度的信号处理电路(14)，信号处理电路(14)分别算出具有相同时间幅度的期间(A～C)中的荧光信号的积分值，基于两个期间中的积分值，算出差分值，从两个差分值之比算出随测定温度变化的变量，参照事先存储的温度和差分值之比的关系，将所算出的变量换算成温度。

Optical systems for sensing and measuring physical quantities

Patent SE8203297L

Fiber optic temperature sensor

Remote temperature sensing of small volume and related apparatus thereof

Optical-fibre sensor for measuring physical quantities

Method and device for measuring temperatures using semiconducting nanocrystals

Method and device for measuring temperatures, in particular cryogenic temperatures, with the aid of semiconducting nanocrystals. To measure the temperature of an object (20), use is made of a sensor (24) comprising semiconducting nanocrystals, the nanocrystals are placed in thermal contact with the object, the nanocrystals are irradiated with an excitation light (26) such that they emit a fluorescence radiation (28), the decay time of the radiation is determined and the temperature is determined on the basis of this time. According to the invention, the excitation light (26) is modulated with a modulation signal, the phase shift between the modulation signal for the excitation light, which is reflected by the sensor, and the fluorescence radiation detected (28) is measured, and the decay time is determined on the basis of the phase shift thus measured.

Optical cryogenic temperature measurement device.

La présente invention concerne un dispositif de mesure optique de températures de fluides cryogéniques ou de surfaces mobiles dans de tels fluides par analyse du déclin de la luminescence d'un cristal dopé, ce dispositif comportant une source lumineuse (1) d'excitation dudit cristal, une fibre optique (50, 51, 52, 53) pour transporter le flux lumineux émis par cette source jusqu'au cristal et pour retransmettre vers un ensemble de détection (3) l'émission lumineuse luminescente du cristal en résultant, et une sonde de mesure en regard de laquelle le fluide ou la surface mobile se déplace, caractérisé en ce que le cristal dopé (22) est constitué par l'un des éléments du groupe comprenant un fluorure de strontium dopé à l'ytterbium divalent (SrF2: Yb2+) et un fluorure de calcium dopé à l'ytterbium divalent (CaF2: Yb2+). Dans un mode de réalisation destiné à la mesure de températures de surfaces mobiles, la sonde de mesure comporte une fibre de transmission (50) du flux lumineux émis par la source lumineuse (1) et au moins une fibre réceptrice (51, 52) de retransmission de l'émission lumineuse renvoyée par le cristal dopé présent sous la forme d'un revêtement cristallin (22) recouvrant un endroit déterminé de la surface à explorer, ces fibres étant entourées chacune par un capillaire métallique (24). The present invention relates to a device for optical measurement of temperatures of cryogenic fluids or of moving surfaces in such fluids by analyzing the decline in luminescence of a doped crystal, this device comprising a light source (1) for excitation of said crystal, an optical fiber (50, 51, 52, 53) for transporting the luminous flux emitted by this source to the crystal and for retransmitting to a detection assembly (3) the luminescent light emission of the resulting crystal, and a sensor of measure opposite which the fluid or the mobile surface moves, characterized in that the doped crystal (22) is constituted by one of the ...

Thermal imagery temperature sensor and the method for manufacturing thermal imagery temperature probe

本发明提供一种热像温度传感器以及制造热像温度探针的方法。所述热像温度传感器包括探针，所述探针具有外壳和安置于所述外壳内的光管。所述光管包括可以响应于吸收光而发磷光的热像磷光体。所述热像磷光体发磷光以表示接触所述探针的流体的温度，且所述光管的表面积不接触所述外壳的内表面。

Multiplexing and calibration techniques for optical signal measuring instruments

An optical temperature measuring instrument for detecting illuminescense of phosphor temperature sensing elements, wherein a two or more point temperature calibration system allows compensating for different temperature sensor characteristics, and a single optical system is utilized for simultaneously reading the temperatures of a plurality of temperature sensors in a multiplexing arrangement.

Fluorescence based thermometry

A temperature sensor includes a photon source, a fluorescent element and a photodetector. The fluorescent element includes a temperature-insensitive first fluorophore and a temperature-sensitive second fluorophore. The photodetector includes a first photosensor exhibiting a first spectral responsivity and a second photosensor exhibiting a second spectral responsivity. The first fluorophore may be selected to optimize the first spectral responsivity and the second fluorophore may be selected to optimize the second spectral responsivity. To measure a temperature of a surface, the fluorescent element may be placed adjacent to the surface and irradiated with a photon beam. First photons emitted from the first fluorophore and second photons emitted from the second fluorophore are collected. The first and second photons may be transmitted as a single dichromatic beam to a photodetector that includes two photosensors having different respective spectral responsivities such that the two photosensors generate two different electrical output signals, the ratio of which may be correlated to temperature.

Nanoparticle thermometry and pressure sensors

A nanoparticle fluorescence (or upconversion) sensor comprises an electromagnetic source, a sample and a detector. The electromagnetic source emits an excitation. The sample is positioned within the excitation. At least a portion of the sample is associated with a sensory material. The sensory material receives at least a portion of the excitation emitted by the electromagnetic source. The sensory material has a plurality of luminescent nanoparticles luminescing upon receipt of the excitation with luminance emitted by the luminescent nanoparticles changing based on at least one of temperature and pressure. The detector receives at least a portion of the luminance emitted by the luminescent nanoparticles and outputs a luminance signal indicative of such luminance. The luminescence signal is correlated into a signal indicative of the atmosphere adjacent to the sensory material.

Sensor apparatus used in measurement of fluorescent decay

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Calibration system for fiber optic temperature probe

A temperature sensing system comprising: an optical temperature sensing probe; a cable coupled to the probe for interfacing the probe with a converter via a connector; an optical fiber carried through the cable from the probe; and a calibration module positioned in the probe or connector, wherein the connector comprises at least two electrical conductors to enable the calibration module to communicate with the converter via the connector. A connector for connecting the probe to a converter via a cable coupled to the connector, the connector including a bore for carrying an optical fiber from the cable to the converter; at least two contact points; and at least two electrical connections. An extension cable for connecting the probe to a converter, comprising: a first and second end, and at least two electrical conductors extending between the first and second ends to carry a signal from the probe to the converter.

Device and method of testing coefficient of transformation of sample

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REMOTE MEASUREMENT OF PHYSICAL VARIABLES WITH FIBER OPTICAL SYSTEMS.

Optical temperature sensors and optical-chemical sensors with optical temperature compensation

Fibre-optic sensor with a fluorescent substance

The decay time of the fluorescence of this substance depends on a physical quantity, for example temperature, and the fluorescent radiation in the sensor is fed back to the excitation circuit in a resonant circuit and the frequency of the resonant circuit is thus a measure of the physical quantity. The fluorescence signal is fed back via an oscillator (16a), the control signal of which is derived from the decay time of the fluorescence signal. This achieves much better instrumentation characteristics than in the known feedback via a timing section. <IMAGE>

Optoelectronic transducer module for thermographic temperature measurements

Examples of a optoelectronic transducer module with integrated signal processing for use in thermographic temperature measurement are disclosed. The module includes a light source to provide an excitation light, an optical element to couple the light to an optical port, a connector configured to connect the optoelectronic transducer module to a fiber optic sensor, a detector coupled to the optical port to detect an emitted light from the fiber optic sensor and convert the detected emitted light into an electrical signal, a module processing unit coupled to the light source and the detector configured to convert the electrical signal into a set of digital results, a high speed circuitry in communication with an external processing unit for data aggregation and a low speed circuitry in communication with the external processing unit for configuration and fimiware upgrade in the module.

Bladder temperature measurement for high intensity focused ultrasound

System and method of measuring and controlling temperature of optical fiber tip in a laser system

A system and method of sensing temperature at an optical fiber tip, including the steps of positioning a slug of fluorescent material adjacent the optical fiber tip, providing an optical stimulus having a wavelength within a first predetermined range through at least one fiber optically linked to the optical fiber tip, wherein a desired optical fluorescent response having a wavelength within a second predetermined range from the fluorescent slug is generated, detecting a signal representative of the optical stimulus, detecting a signal representative of the optical fluorescent response, digitally processing the optical stimulus signal and the optical fluorescent response signal to determine a phase difference therebetween, and calculating a temperature for the optical fiber tip as a function of the phase difference. The phase difference between the optical stimulus signal and the optical fluorescent response signal may be determined directly or indirectly as a function of the phase difference between a reference signal and the optical stimulus signal and the phase difference between the reference signal and the optical fluorescent response signal.

Patent FR2467395B1

DEVICE FOR MEASURING TEMPERATURE USING A SENSOR ELEMENT

Applications of heat flux modulation of a temperature probe

To measure the heat transfer coefficient of a sample, an element with temperature sensitive optical properties is placed in contact or implanted in the sample. The element is heated or cooled. The temperature difference between the element and the unheated sample and the rate of heating or cooling indicate the heat transfer coefficient of the sample. In one embodiment, the element is heated or cooled at a constant rate. The heat transfer coefficient of the sample is then inversely related to the difference in temperature between the element and the unheated sample. Alternatively, the element may be heated or cooled at such a rate that the temperature difference between the element and the unheated sample remains substantially constant. The heat transfer coefficient of the sample then varies directly with the rate of heating or cooling. The heat transfer coefficient of a sample is a measure of its composition and other physical properties. The composition of gasses, liquids, the presence of bubbles in a liquid, and fluid levels can be detected by the optical technique. Pressure and flow rates of fluids can also be detected. The technique can be used also to more accurately measure the thermal conductivity and temperature of small objects with small heat capacities.

Thermally Compensated Fluorescence Decay Rate Temperature Sensor and Method of Use

The present invention provides a thermally compensated fluorescence decay rate temperature sensor capable of measuring the true temperature of a sample surface and its associated method of use.

Method and device for measuring temperature

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Optical temperature measurement techniques

An optical temperature measurement technique that utilizes the decaying luminescent intensity characteristic of a sensor composed of a luminescent material that is excited to luminescence by a light pulse or other periodic or other intermittent source of radiation. The luminescent emissions of a preferred sensor exhibit an approximately exponential decay with time that is the average of a distribution of chemically reproducible crystallites and are repeatable with a high degree of accuracy regardless of excitation level or prior temperature history of the sensor.

DEVICE FOR MEASURING THE TEMPERATURE OF A SAMPLE.

Optical temperature measurement techniques utilizing phosphors

A technique of temperature measurement wherein an object or environment to be measured is provided with a phosphor material layer that emits at least two optically isolatable wavelength ranges whose intensity ratio depends upon the object or environment temperature, the emitted radiation being brought to a detector by an optical system that may include an optical fiber. Several specific applications of this technique are disclosed, such as temperature monitoring of electrical equipment and industrial processing, medical temperature instrumentation including the use of disposable elements that contain a small quantity of the temperature dependent phosphor, special and multiple probes, the use of liquid phosphors, and a phosphor paint for monitoring surface temperatures.

Optical system for an instrument to detect the temperature of an optical fiber phosphor probe

An optical system for exciting a temperature dependent phosphor with radiation and detecting independently emissions therefrom in optically isolable first and second wavelength ranges that gives an indication of the temperature of the phosphor. The optical system is carried by a heat-insulating housing disposed between a heat generating light source and the heat sensitive detectors. Dichroic mirrors are utilized to separate the two wavelength ranges emitted by the phosphor and to allow the sharing of a common optical path by three different radiation wavelength ranges without an undue loss of radiation intensity in any of the wavelength ranges. The light source may be of a helically shaped filament that is tilted with respect to an imaging optical axis so that the side of the helix is imaged with a minimum amount of the space between the turns showing, thereby maximizing the optical energy imaged from the light source. A temperature sensitive phosphor sensor is utilized with the instrument for internal calibration. The internal reference phosphor sensor also has its temperature measured by another standard technique for comparison. The internal calibration can also be used to calibrate a phosphor sensor on the end of a optical fiber by placing that end in a calibration bath maintained within the instrument.

Single piece fabry-perot optical sensor and method of manufacturing the same

Patent JPH033170B2

Optical sensor

An optical sensor having a sapphire body is disclosed. A hollow in the sapphire body defines a surface which is used as a surface of a Fabry-Perot cavity. Interferometry is used to detect changes in the length of the Fabry-Perot cavity, and hence changes in, for example, the temperature or pressure of an environment in which the sensor is placed.

Device for optical measurement of cryogenic temperatures

Temperature sensitive body, optical temperature sensor, temperature measurement device, and heat flux measurement

A temperature sensitive body 102 used as a target of an optical temperature measurement, includes an inclusion 202 having an optical property related to an irradiated light varies with a change in temperature, and a light-transmissive outer shell member 200 enclosing the inclusion 202 . When a temperature is measured, the inclusion 202 emits light when a light is radiated upon the inclusion 202 . Since an optical property related to the irradiated light varies in accordance with a change in temperature, the temperature of the inclusion 202 can be detected by analyzing the outgoing light. A temperature of a location in which the temperature sensitive body is provided can be detected using the temperature of the inclusion 202.

In situ optical surface temperature measuring techniques and devices

A luminescent temperature sensor comprising (i) an object having a recess, (ii) a layer of luminescent material disposed in the recess, wherein the luminescent material emits electromagnetic radiation having a detectable optical characteristic that is functionally dependent on the temperature of the object, and (iii) a light waveguide in optical communication with the layer of luminescent material, is provided. A test device for measuring a temperature in a processing step comprising (i) an object having a surface and having a recess in the surface of the object, (ii) a layer of luminescent material disposed in the recess, wherein the luminescent material emits electromagnetic radiation having a detectable optical characteristic that is functionally dependent on the temperature of the object in response to a source of excitation radiation, and (iii) an optical window that seals said layer of luminescent material in the recess in the surface of the object, is provided.

System comprising thermal imagery temperature sensor and the system comprising gas turbine engine

本实用新型公开了一种包含热像温度传感器的系统，所述热像温度传感器可测量流体的温度。所述热像温度传感器包括探针，连接到所述探针的光源和连接到所述探针的检测器。所述系统还包括：所述探针的外壳；以及所述探针的光管，其安置于所述外壳内且包括可响应于吸收来自所述光源的光而发磷光的热像磷光体。所述热像磷光体发磷光表示所述流体的流动路径内所述流体的温度，且所述检测器可以检测所述热像磷光体发磷光；其中还公开了一种包括燃气涡轮机引擎的系统。

Patent JPH0412410B2

Thermo-fluorescent optical fiber, method of manufacture and applications

L’invention concerne une fibre optique thermo-fluorescente comprenant un cœur apte à propager la lumière et une gaine, ladite fibre portant au moins à l’une de ses extrémités ou en un site sur sa longueur, dépourvu de gaine, ladite fibre optique étant munie d’une sonde constituée d’une matrice comprenant des particules thermo-fluorescentes, la matrice étant photo-polymérisée. L’invention se rapporte aussi à un procédé de fabrication d’une telle fibre optique, ainsi qu’à ses applications, notamment dans un capteur de température. The invention relates to a thermo-fluorescent optical fiber comprising a core able to propagate light and a sheath, said fiber bearing at least at one of its ends or at one site along its length, devoid of sheath, said optical fiber being provided with a probe consisting of a matrix comprising thermo-fluorescent particles, the matrix being photo-polymerized. The invention also relates to a method of manufacturing such an optical fiber, as well as to its applications, in particular in a temperature sensor.

Medical systems with a temperature sensor or a temperature measuring apparatus

为了提供温度传感器或具有温度传感器的温度测量设备，所述温度测量设备（尤其）甚至在处理期间（尤其）甚至使用HF外科装置实现直接温度测量，本发明提出所述温度传感器包含传感器元件和光波导，所述传感器元件具有可激励发光（尤其是荧光）的介质，所述光波导光学连接到传感器元件并意在以激励波长供应光到介质及/或以介质的发光波长获得并引导光，所述介质可激励发光。

Apparatus for determining a temperature of a substrate and methods therefor

기판의 온도를 측정하는 장치가 개시된다. 장치는 기판과 열 접촉된 인광 물질을 포함하고, 인광 물질은 제 2 파장 범위의 전자기 방사에 노출되었을 때 제 1 파장 범위의 형광 반응을 생성하고, 형광 반응은 인광 물질의 온도와 연관되는 감쇠율로 감쇠 되며, 그리고 인광 물질은 플라즈마에 노출되었을 때 제 1 세트의 비-휘발성 부산물을 생성한다. 장치는 또한 인광 물질과 플라즈마 사이에 위치한 배리어 윈도우 (barrier window) 를 포함하고, 배리어 윈도우는 적어도 제 1 파장과 제 2 파장 부분이 투과되도록 하고, 배리어 윈도우는 플라즈마에 노출되었을 때 제 1 세트의 비-휘발성 부산물보다 적은 제 2 세트의 비-휘발성 부산물을 생성하고, 전자기 방사가 배리어 윈도우를 통하여 인광 물질까지 투과될 때, 온도가 형광 반응의 감쇠율로부터 결정된다. 기판 온도 측정 장치, 플라즈마 처리 시스템, 인광 물질, 노치, 배리어 윈도우 An apparatus for measuring the temperature of a substrate is disclosed. The apparatus includes a phosphor in thermal contact with the substrate, the phosphor generating a fluorescent reaction in the first wavelength range when exposed to electromagnetic radiation in the second wavelength range, the fluorescent reaction being at attenuation rate associated with the temperature of the phosphor. The phosphor is attenuated and produces a first set of non-volatile byproducts when exposed to the plasma. The apparatus also includes a barrier window positioned between the phosphor and the plasma, the barrier window allowing at least a first wavelength and a second wavelength portion to be transmitted and the barrier window being exposed to the plasma in the first set of ratios. When a second set of non-volatile by-products are produced that are less than -volatile by-products, and electromagnetic radiation is transmitted through the barrier window to the phosphor, the temperature is determined from the decay rate of the fluorescence reaction. Substrate Temperature Measurement Devices, Plasma Processing Systems, Phosphors, Notches, Barrier Windows

Sensor system using fluorometric decay measurements

A body fluid component and/or temperature monitoring system including a fiber optic catheter, fluid monitoring probe at the distal end of the catheter, pulse light source for exciting the probe, and photosensor for responding to light coming from the distal end of the catheter. Circuitry analyzes the light output from the probe and determines a time delay that characterizes the body fluid component concentration or temperature. The time decay is then preferably converted to either component concentration or temperature and displayed on a visual display.

Gas temperature sensor with thermally luminescent compounds

A thermally luminescent temperature sensor with a rare earth emitter having a first selective electromagnetic light energy emission band and a second selective electromagnetic light energy emission band in which the rare earth emitter converts thermal energy to electromagnetic light energy within the first and second selective energy emission bands. The sensor also has a selective optical detector in optical communication with the rare earth emitter, wherein the selective optical detector independently detects each the first and second selective electromagnetic light energy emission bands. Lastly, the thermally luminescent temperature sensor determines the temperature based on the electromagnetic light energy measured within the first and second selective energy emission bands relative to each other. Optionally additional emission bands may be used in the evaluation of the temperature.

non contact type fluorescence thermometer

본 발명은, 길이 방향으로 이어지는 원형의 중공을 구비하는 관체; 상기 관체 일단에 배치되어 상기 관체 타단을 향해 광을 조사하는 광원; 상기 관체 타단에 배치되어 상기 광원으로부터의 상기 광 전달에 따라 형광체를 통해 형광을 발생하는 온도센서; 상기 관체 일단과 타단 사이에 배치되어 상기 광원으로부터의 상기 광을 투과하고 상기 온도센서로부터 발생한 형광을 일 방향으로 반사하는 반사부재; 및 상기 반사부재로부터 반사되는 상기 형광을 검출하여 상기 형광 강도에 따른 형광 신호를 출력하는 광검출기;를 포함하고, 상기 온도센서는 상기 형광체로서 업컨버전(upconversion) 또는 다운시프팅(downshifting) 발광 특성을 갖는 α-사이알론 세라믹스를 포함하는 것을 특징으로 하는 비접촉식 형광 온도 측정장치에 관한 것이다. The present invention, a tube having a circular hollow extending in the longitudinal direction; a light source disposed at one end of the tube and irradiating light toward the other end of the tube; a temperature sensor disposed at the other end of the tube to generate fluorescence through a phosphor according to the transmission of the light from the light source; a reflective member disposed between one end and the other end of the tube to transmit the light from the light source and reflect the fluorescence generated from the temperature sensor in one direction; and a photodetector that detects the fluorescence reflected from the reflective member and outputs a fluorescence signal according to the fluorescence intensity, wherein the temperature sensor has an upconversion or downshifting light emitting characteristic as the phosphor. It relates to a non-contact fluorescence temperature measuring device comprising α-sialon ceramics having a.

METHOD AND DEVICE FOR MEASURING TEMPERATURES, ESPECIALLY CRYOGENIC TEMPERATURES, USING SEMICONDUCTOR NANOCRYSTALS

Procédé et dispositif de mesure de températures, notamment de températures cryogéniques, à l'aide de nanocristaux semiconducteurs. Pour mesurer la température d'un objet (20), on utilise un capteur (24) comportant des nanocristaux semiconducteurs, on met les nanocristaux en contact thermique avec l'objet et l'on irradie les nanocristaux par une lumière (26) telle qu'ils émettent un rayonnement de fluorescence (28). Selon l'invention, on détermine le temps de décroissance du rayonnement et l'on détermine la température à partir de ce temps.

Fibre optic sensor system

A combined pressure and temperature sensor, the sensor comprising at least one first optical sensing element of a first type and at least one second optical sensing element of a second type, wherein the sensor is adapted to compensate for temperature and/or pressure effects in the first or second optical sensing element using a response of the other of the second or first optical sensing elements.

System and method of measuring and controlling temperature of optical fiber tip in a laser system

In situ optical surface temperature measuring

A temperature sensor that has a thermally conducting contact with a surface that emits electromagnetic radiation in proportion to the temperature of the contact is disclosed. The sensor has a resilient member attached to the contact and configured to extend the contact toward the object to be measured. A first light waveguide is attached to the contact and is configured to transmit the electromagnetic radiation from the contact. The sensor has a guide with a bore formed therein that the first waveguide is insertable into. When the contact is moved, the first waveguide moves within the bore. A second waveguide is attached to the guide such that a variable gap is formed between the ends of the first waveguide and the second waveguide. Electromagnetic energy from the first waveguide traverses the gap and can be transmitted by the second waveguide. The guide allows the first waveguide to move with the contact in order to ensure that the contact is fully engaged with the surface of the object.

Measuring device for temperature

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Fluorescence based thermometry

A temperature sensor includes a photon source, a fluorescent element and a photodetector. The fluorescent element includes a temperature-insensitive first fluorophore and a temperature-sensitive second fluorophore. The photodetector includes a first photosensor exhibiting a first spectral responsivity and a second photosensor exhibiting a second spectral responsivity. The first fluorophore may be selected to optimize the first spectral responsivity and the second fluorophore may be selected to optimize the second spectral responsivity. To measure a temperature of a surface, the fluorescent element may be placed adjacent to the surface and irradiated with a photon beam. First photons emitted from the first fluorophore and second photons emitted from the second fluorophore are collected. The first and second photons may be transmitted as a single dichromatic beam to a photodetector that includes two photosensors having different respective spectral responsivities such that the two photosensors generate two different electrical output signals, the ratio of which may be correlated to temperature.

Calibration system for fiber optic temperature probe

提供了一种温度传感系统，包括一光学温度传感探头；一连接到所述探头的电缆，用于通过一连接器使所述探头与所述转换器交互；一根从所述探头穿过所述电缆的光纤；一位于所述探头或所述连接器中的校准模块，其中所述连接器包括至少两个电导体，以使所述校准模块能够通过所述连接器与所述转换器通信。还提供了一种连接器，用于通过耦合到所述连接器的电缆将一光学温度传感探头连接到一转换器，所述连接器包括一用于将光纤从所述电缆传送到所述转换器的孔；至少两个接触点；以及经由所述至少两个接触点的至少两个电连接。还提供了一种用于将一光学温度传感探头连接到一转换器的延长电缆，该延长电缆包括一第一端和一第二端，以及在所述第一端和所述第二端之间延伸的至少两个电导体，以承载来自所述探头经由所述延长电缆到所述转换器的信号。