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1. 发明申请

WO2007087040A2 DEMODULATION METHOD AND APPARATUS FOR FIBER OPTIC SENSORS 审中-公开
标题翻译：光纤传感器的解调方法和装置
公开(公告)号：WO2007087040A2
公开(公告)日：2007-08-02
申请号：PCT/US2006/047719
申请日：2006-12-15
申请人： LUNA INNOVATIONS INCORPORATED , BOYD, Clark, Davis
发明人： BOYD, Clark, Davis
IPC分类号： G01B9/02
CPC分类号： G01B9/02014 , G01B9/02007 , G01B9/02069 , G01B9/02079 , G01B2290/25 , G01B2290/45 , G01D5/35312 , G01D5/35325 , G01D5/35329 , G01L1/242 , G01L9/0079
摘要： An interferometric sensing arrangement includes an interferometric sensor having an optical path length that varies depending on one or more physical parameters to be measured using the interferometric sensor. One or more light sources are used to generate light at three or more predetermined different fixed wavelengths. In a preferred example embodiment, four fixed wavelength lasers are used to generate light at four predetermined different fixed wavelengths. An optical coupler couples the multiple wavelength light to the interferometric sensor, and a detector measures an amplitude response of an interferometric signal produced by the interferometric sensor. A controller determines the optical path length based on the measured amplitude response.
摘要翻译：干涉测量装置包括干涉测量传感器，其具有根据使用干涉测量传感器测量的一个或多个物理参数而变化的光程长度。一个或多个光源用于产生三个或更多个预定的不同固定波长的光。在优选示例实施例中，使用四个固定波长激光器来产生四个预定的不同固定波长的光。光耦合器将多波长光耦合到干涉测量传感器，并且检测器测量由干涉测量传感器产生的干涉信号的振幅响应。控制器基于所测量的振幅响应来确定光路长度。

2. 发明申请

WO1998015494A1 STRAIN SENSOR AND SYSTEM 审中-公开
标题翻译：应变传感器和系统
公开(公告)号：WO1998015494A1
公开(公告)日：1998-04-16
申请号：PCT/US1996016189
申请日：1996-10-09
申请人： McDONNELL DOUGLAS CORPORATION , BELK, John, H.
发明人： McDONNELL DOUGLAS CORPORATION
IPC分类号： C01B09/02
CPC分类号： G01L1/242 , G01D5/35312 , G01D5/35316 , G01D5/3538 , G01L1/26
摘要： A strain sensor (50) combines an intrinsic Fabry-Perot interferometer (IFPI) (60) with an extrinsic Fabry-Perot interferometer (EFPI) (56, 62). The IFPI (60) is between two EFPIs (56, 64) and shares its two air to glass mirrors (58, 64). The outside edges (54, 66) of the two EFPIs (56, 64) are connected to an optical fiber (52). The strain sensor (164) can be implemented on a semiconductor chip (150). A waveguide (156) on the semiconductor chip (150) is etched to form two blocks (158) with an island section (162) between them. The two blocks (158) form the EFPI and the center section (162) forms the IFPI. A strain measurement system (100) that takes advantage of the strain sensor (50) has a laser (102) coupled to an optical fiber (106) containing one or more strain sensors (108). A coupler (104) directs the reflected light from the sensors (108) to a tunable Fabry-Perot etalon (114). The output of the tunable Fabry-Perot etalon (114) is coupled to a photodetector (116). A controller (118) monitors the output of the photodetector (116) and controls the tunable Fabry-Perot etalon (114).
摘要翻译：应变传感器（50）将本征法布里 - 珀罗干涉仪（IFPI）（60）与外在法布里 - 珀罗干涉仪（EFPI）（56,62）组合。 IFPI（60）位于两个EFPI（56,64）之间，并分享其两个空气到玻璃镜（58,64）。两个EFPI（56,64）的外边缘（54,66）连接到光纤（52）。应变传感器（164）可以在半导体芯片（150）上实现。在半导体芯片（150）上的波导（156）被蚀刻以在它们之间形成具有岛部（162）的两个块（158）。两个块（158）形成EFPI，中心部分（162）形成IFPI。利用应变传感器（50）的应变测量系统（100）具有耦合到包含一个或多个应变传感器（108）的光纤（106）的激光（102）。耦合器（104）将来自传感器（108）的反射光引导到可调谐的法布里 - 珀罗标准具（114）。可调谐法布里 - 珀罗标准具（114）的输出耦合到光电检测器（116）。控制器（118）监视光电检测器（116）的输出并控制可调法布里 - 珀罗标准具（114）。

3. 发明申请

WO2015148088A1 SYSTEMS AND METHODS FOR DISTRIBUTED PRESSURE SENSING 审中-公开
标题翻译：用于分布式压力感测的系统和方法
公开(公告)号：WO2015148088A1
公开(公告)日：2015-10-01
申请号：PCT/US2015/019082
申请日：2015-03-06
申请人： GENERAL ELECTRIC COMPANY
发明人： CHALLENER, William, Albert , KOSTE, Glen, Peter , DEKATE, Sachin, Narahari , PALIT, Sabarni
IPC分类号： G01L11/02 , G01D5/353
CPC分类号： G01L11/025 , E21B47/06 , G01D5/35312 , G01D5/3538
摘要： A pressure sensing cable in one embodiment includes a polarization maintaining (PM) optic fiber having a length; and a Fiber Bragg Grating (FBG) pair formed in the PM optic fiber. The FBG pair includes a first FBG formed at a location along the length of the optic fiber. The first FBG defines a first wavelength range at which the first FBG is reflective. The FBG pair also includes a second FBG spaced a distance from the first FBG to define a FBG cavity extending between the first FBG and the second FBG. The second FBG defines a second wavelength range at which the second FBG is reflective. The first wavelength range of the first FBG and the second wavelength range of the second FBG at least partially overlap.
摘要翻译：一个实施例中的压力感测电缆包括具有长度的偏振维持（PM）光纤; 和在PM光纤中形成的光纤布拉格光栅（FBG）对。 FBG对包括沿着光纤长度的位置形成的第一FBG。第一FBG定义了第一个FBG反射的第一波长范围。 FBG对还包括与第一FBG隔开距离的第二FBG，以限定在第一FBG和第二FBG之间延伸的FBG腔。第二FBG定义了第二个波长范围，第二个FBG反射。第一FBG的第一波长范围和第二FBG的第二波长范围至少部分重叠。

4. 发明申请

WO2013139783A1 A SENSOR FOR COMBINED TEMPERATURE, PRESSURE, AND REFRACTIVE INDEX DETECTION 审中-公开
标题翻译：用于组合温度，压力和折射率指标检测的传感器
公开(公告)号：WO2013139783A1
公开(公告)日：2013-09-26
申请号：PCT/EP2013/055677
申请日：2013-03-19
申请人： UNIVERSITY OF LIMERICK
发明人： REINSCH, Thomas , BREMER, Kort , LEWIS, Elfed , LEEN, Gabriel , LOCHMANN, Steffen
IPC分类号： G01D5/353
CPC分类号： G01N21/55 , G01D5/35312 , G01D5/35316 , G01K11/3206 , G01L1/246 , G01N21/29 , G01N21/4133 , G01N21/7703 , G01N2021/7763 , G01N2021/7776 , G01N2021/7786 , G01N2201/088
摘要： A sensor (1) has a light conductor (2) having a grating (FBG), a cavity (5), and a transparent cavity end wall (4), a light emitter for directing light through the conductor, and a light detector for detecting reflected light, and a processor. The processor is adapted to analyse light reflected due to the grating (FBG, 6) to determine an indication of temperature, light reflected from the end (7) of the cavity (5) to determine an indication of pressure, and also light reflected from the outer surface (8) of the cavity wall (4) to determine an indication of refractive index of a medium outside said cavity wall. The processor may use one output to compensate another, for example pressure and temperature may be used to compensate for variation in refractive index.
摘要翻译：传感器（1）具有光导体（2），其具有光栅（FBG），空腔（5）和透明腔端壁（4），用于引导光通过导体的光发射器，以及光检测器检测反射光和处理器。处理器适于分析由光栅（FBG，6）反射的光，以确定温度的指示，从腔（5）的端部（7）反射的光，以确定压力的指示，以及从空腔壁（4）的外表面（8）以确定在所述腔壁外部的介质的折射率的指示。处理器可以使用一个输出来补偿另一个输出，例如压力和温度可用于补偿折射率的变化。

5. 发明申请

WO2008092372A1 光纤法珀传感器及其制造方法审中-公开
公开(公告)号：WO2008092372A1
公开(公告)日：2008-08-07
申请号：PCT/CN2008/000153
申请日：2008-01-22
申请人：电子科技大学 , 冉曾令 , 饶云江
发明人：冉曾令 , 饶云江
IPC分类号： G01D5/353 , G01B9/02 , G01J3/26 , G02B6/255 , G01K11/00 , G01L1/00
CPC分类号： G01J3/26 , G01D5/35312 , G01L9/0079 , G02B6/02052 , G02B6/34
摘要： An optical fiber Fabry-Perot sensor, includes an optical fiber (1) and a butted optical fiber (4), the end face of the optical fiber (1) or / and the butted optical fiber (4) has a micro-flute (3), the optical fiber (1) and the butted optical fiber (4) are butted together, the micro-flute forms a FP cavity (7), the optical reflection surface of the FP cavity is a plane surface. A manufacture method of the optical fiber Fabry-Perot sensor.

6. 发明申请

WO2007045028A9 APPARATUS FOR INTERFEROMETRIC SENSING 审中-公开
标题翻译：用于干涉测量的装置
公开(公告)号：WO2007045028A9
公开(公告)日：2007-11-01
申请号：PCT/AU2006001541
申请日：2006-10-18
申请人： UNIV AUSTRALIAN , CHOW JONG H , GRAY MALCOLM B , MCCLELLAND DAVID E
发明人： CHOW JONG H , GRAY MALCOLM B , MCCLELLAND DAVID E
IPC分类号： G01D5/26 , G01B9/02 , G01J9/02 , G01L1/24
CPC分类号： G01B9/02004 , G01B9/02002 , G01B9/02007 , G01B9/02027 , G01B9/02067 , G01B2290/25 , G01B2290/45 , G01D5/35312 , G01D5/35387
摘要： An apparatus for interferometric sensing, comprising a plurality of single-longitudinal mode laser sources to each provide radiation at a corresponding plurality of selected wavelengths, and at least one modulator to frequency or phase modulate the radiation from each laser; a plurality of Fabry-Perot interferometers formed by Bragg Gratings written into optical fibre, each interferometer being responsive to one of the said plurality of wavelengths to each produce a reflected or transmitted optical output signal dependent on the corresponding interferometer path length; and one or more demodulators to demodulate the optical output signals and produce a corresponding plurality of measurement signals indicative of optical path lengths of the respective interferometers.
摘要翻译：一种用于干涉测量的装置，包括多个单纵模激光源，每个激光源以相应的多个选定波长提供辐射;以及至少一个调制器，对来自每个激光器的辐射进行频率或相位调制; 由写入光纤的布拉格光栅形成的多个法布里 - 珀罗干涉仪，每个干涉仪响应所述多个波长中的一个波长，以产生取决于相应的干涉仪路径长度的反射或透射的光输出信号; 以及一个或多个解调器，用于解调光输出信号并产生相应的多个测量信号，该测量信号指示相应干涉仪的光程长度。

7. 发明申请

WO2003014657A1 MEASUREMENT OF FIBER STRAIN DURING PROCESSING 审中-公开
标题翻译：加工过程中纤维应变的测量
公开(公告)号：WO2003014657A1
公开(公告)日：2003-02-20
申请号：PCT/US2002/024253
申请日：2002-07-30
申请人： CORNING INCORPORATED
发明人： SMITH, James A
IPC分类号： G01B9/02
CPC分类号： G01L1/246 , G01D5/35312 , G01D5/35316
摘要： A method and system for determining strain impressed on an optical fiber at a possibly indeterminate temperature. The fiber (14) is formed with at least two sensors having different strain and temperature characteristics, preferably a Bragg Fabry-Perot sensor having a Fabry-Perot cavity (16) formed between two like Bragg gratings (10, 12) and another Bragg grating 18 of a different pitch written into the Fabry-Perot cavity. Many such pairs can be written if the Bragg gratings reflect in different bands. The fiber is irradiated with broadband light, and the reflection is spectrally separated to produce separate spectra for all sensors. Wavelength shifts from two types of sensors can be correlated with strain and temperature according to predetermined variations of the shifts with known strain and temperature changes.
摘要翻译：用于确定在可能不确定的温度下施加在光纤上的应变的方法和系统。纤维（14）形成有具有不同应变和温度特性的至少两个传感器，优选布拉格法布里 - 珀罗传感器，其具有在两个类似的布拉格光栅（10,12）和另一个布拉格光栅之间形成的法布里 - 珀罗腔（16） 18个不同的音调写入法布里 - 珀罗腔。如果布拉格光栅在不同的频带中反射，则可以写入许多这样的对。用宽带光照射光纤，并且光谱分离反射，为所有传感器产生分离的光谱。根据具有已知应变和温度变化的偏移的预定变化，来自两种类型的传感器的波长偏移可以与应变和温度相关。

8. 发明申请

WO99015858A1 FIBER OPTIC SENSING SYSTEM 审中-公开
标题翻译：光纤传感系统
公开(公告)号：WO99015858A1
公开(公告)日：1999-04-01
申请号：PCT/US1998/018894
申请日：1998-09-08
IPC分类号： G01D5/353 , G01V1/22 , G08C23/06
CPC分类号： G01V1/22 , G01D5/35312 , G08C23/06
摘要： A fiber optic sensor includes a sensor element responsive to a property or condition of a material, such as resistivity, capacitance, inductance, frequency, etc., for providing an output voltage signal that is dependent upon the property or condition of the material. The sensor further includes an optical-to-electrical conversion element, such as a photo detector or a solar cell, that converts an optical signal (photo detector driving optical signal) carried by an optical fiber into an electrical signal. The electrical signal is applied to the sensor element, and in response, the sensor element provides the output electrical signal. The output electrical signal is applied to a measurement device, such as a piezoelectric element, having at least one dimension that varies with changes in the output electrical signal. An optical strain sensor, such as a Bragg grating or Fabry Perot interferometer, is mounted to the measurement device such that changes in the dimension of the measurement device cause changes in the strain of the optical strain sensor. These changes in strain are detected and related to the property or condition of the material. The fiber optic sensor is particularly useful as a resistivity sensor for measuring the resistivity of a fluid. For example, the resistivity of a fluid mixture of oil and water can be measured for determining the relative water and oil content in the fluid mixture. In this configuration, the sensor element includes a pair of spaced apart conductive elements. The output electrical power from the photo detector is applied to the conductive elements and the fluid is passed between the conductive elements. The output voltage from the conductive elements varies in relation to the resistivity of the fluid sample between the conductive elements.
摘要翻译：光纤传感器包括响应于诸如电阻率，电容，电感，频率等的材料的性质或状态的传感器元件，用于提供取决于材料的性质或状况的输出电压信号。传感器还包括将由光纤携带的光信号（光检测器驱动光信号）转换为电信号的光电转换元件，例如光电检测器或太阳能电池。电信号被施加到传感器元件，并且作为响应，传感器元件提供输出电信号。输出电信号被施加到诸如压电元件的测量装置，其具有随输出电信号的变化而变化的至少一个尺寸。将诸如布拉格光栅或法布里珀罗干涉仪之类的光学应变传感器安装到测量装置上，使得测量装置的尺寸变化引起光学应变传感器的应变的变化。这些变化的变化被检测并且与材料的性质或状况有关。光纤传感器特别适用于测量流体电阻率的电阻率传感器。例如，可以测量油和水的流体混合物的电阻率，以确定流体混合物中的相对水和油含量。在该结构中，传感器元件包括一对间隔开的导电元件。来自光检测器的输出电功率被施加到导电元件，并且流体在导电元件之间通过。来自导电元件的输出电压相对于导电元件之间的流体样品的电阻率而变化。

9. 发明申请

WO1996017224A1 DIAGNOSTIC SYSTEM FOR FIBER GRATING SENSORS 审中-公开
标题翻译：光纤传感器诊断系统
公开(公告)号：WO1996017224A1
公开(公告)日：1996-06-06
申请号：PCT/US1994013628
申请日：1994-11-28
申请人： UNITED TECHNOLOGIES CORPORATION
发明人： UNITED TECHNOLOGIES CORPORATION , DUNPHY, James, R. , FALKOWICH, Kenneth, P.
IPC分类号： G01D05/353
CPC分类号： G01D5/35335 , G01D5/35312
摘要： An optical sensor diagnostic system includes a tunable narrow wavelength-band source (9) which provides a variable wavelength light (44) into an optical fiber (32, 52). Reflective sensors (54, 58), such as Bragg gratings, are disposed along the fiber (52) in the path of the variable light (44). The sensors (54, 58) transmit light (56, 60) having a minimum transmission wavelength which varies due to a perturbation, such as strain, imposed thereon. A tuner control circuit (42) drives the tunable light source (9) to cause the source light (44) to scan across a predetermined wavelength range to illuminate each sensor at its minimum transmission wavelength. The power of the transmitted light is converted to an electrical signal by a detector (64) and monitored by a signal processor (68) which detects drops in transmitted power level and provides output signals on lines (71) indicative of the perturbation for each sensor. The system may be configured in open loop mode to measure static strains, or closed loop mode to track static strains and measure dynamic strains. Also, the system may be used in a Fabry-Perot configuration to provide a very sensitive strain detection system. Further, the system may be configured in reflection or transmission mode.
摘要翻译：一种光学传感器诊断系统包括可调谐窄波长带源（9），其向光纤（32,52）提供可变波长光（44）。诸如布拉格光栅的反射传感器（54,58）沿着可变光（44）的路径中的光纤（52）设置。传感器（54,58）透射具有最小透射波长的光（56,60），其由施加在其上的扰动（例如应变）而变化。调谐器控制电路（42）驱动可调光源（9）以使源光（44）在预定波长范围内扫描，以以最小透射波长照亮每个传感器。透射光的功率由检测器（64）转换成电信号，并由信号处理器（68）监控，信号处理器检测发射功率电平的下降，并在线路（71）上提供指示每个传感器扰动的输出信号。该系统可以以开环模式配置，以测量静态应变，或闭环模式来跟踪静态应变并测量动态应变。此外，该系统可以以法布里 - 珀罗（Fabry-Perot）配置使用，以提供非常敏感的应变检测系统。此外，系统可以被配置为反射或传输模式。

10. 发明申请

WO2015105475A1 DOWNHOLE SENSING SYSTEMS AND METHODS EMPLOYING SPECTRAL ANALYSIS OF TIME-DIVISION MULTIPLEXED PULSE SEQUENCES 审中-公开
标题翻译：井下感测系统和采用时分多项式脉冲序列的光谱分析方法
公开(公告)号：WO2015105475A1
公开(公告)日：2015-07-16
申请号：PCT/US2014/010399
申请日：2014-01-07
申请人： HALLIBURTON ENERGY SERVICES, INC.
发明人： CHOI, Han-sun , SAMSON, Etienne
IPC分类号： E21B49/10 , G01N21/25 , G01N21/85
CPC分类号： G01V8/24 , E21B47/00 , E21B47/06 , E21B47/065 , E21B47/123 , G01D5/35312 , G01J3/26
摘要： An illustrative downhole sensing system and method employs an array of downhole sensors such as extrinsic Fabry-Perot interferometers, each of which provides a sequence of light pulses having spectra indicative of a measurand for that downhole sensor. An optical fiber conveys the sequences in a time -multiplexed fashion to a receiver having at least one gating element that passes only a selected one of the sequences and at least one spectrometer that receives the selected one of said sequences and responsively measures a light spectrum. Notably, the integration interval for the spectrometer measurement is substantially greater than the pulse period of each sequence, including multiple pulses within the measurement by the spectrometer.
摘要翻译：示例性井下感测系统和方法采用诸如外部法布里 - 珀罗干涉仪的井下传感器阵列，每个干涉仪提供具有指示该井下传感器的被测量的光谱的光脉冲序列。光纤以时间多路复用方式将序列传送到具有至少一个选通单元的接收器，该选通元件仅通过选定的一个序列，以及至少一个光谱仪，其接收所选择的一个所述序列并且响应地测量光谱。值得注意的是，光谱仪测量的积分间隔显着大于每个序列的脉冲周期，包括由光谱仪测量的多个脉冲。

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