公开(公告)号：EP2977734B1

公开(公告)日：2018-12-12

申请号：EP15174369.7

申请日：2015-06-29

申请人： Yokogawa Electric Corporation

发明人： Shida, Hideo

IPC分类号： G01K11/32

CPC分类号： G01K11/32 ,  G01K2011/324

摘要： An optical fiber temperature distribution measuring device includes: an optical fiber as a sensor; a calculation control unit for measuring a temperature distribution along the optical fiber by using backward Raman scattered light from the optical fiber; a far-end-position dispersion characteristic calculation unit for obtaining a dispersion characteristic of the optical fiber at a far-end position thereof; a per-unit-length dispersion characteristic calculation unit for obtaining a per-unit-length dispersion characteristic of the optical fiber based on the dispersion characteristic of the optical fiber at the far-end position thereof; and a correction parameter calculation unit for calculating a correction parameter for correcting a dispersion characteristic of the optical fiber based on a dispersion characteristic at each of different positions along the optical fiber.

公开(公告)号：EP2775278B1

公开(公告)日：2017-11-29

申请号：EP14156237.1

申请日：2014-02-21

申请人： Yokogawa Electric Corporation

发明人： Shida, Hideo ,  Oishi, Kazushi

IPC分类号： G01K11/32

CPC分类号： G01K11/32 ,  G01K2011/324

摘要： An optical fiber temperature distribution measurement device for measuring a temperature distribution along a longitudinal direction of an optical fiber is provided. The device includes: a light transmitter configured to input a train of code-modulated light pulses into the optical fiber; a light receiver configured to receive Raman back scattering lights generated by inputting the train of code-modulated light pulses into the optical fiber; a demodulator configured to perform a correlation processing between a measured signal output from the light receiver and a code string associated with a type of the code modulation performed by the light transmitter, and to demodulate the measured signal; a storage storing a correction data to be used to correct a distortion of the measured signal output from the light receiver when an impulsive pulsed light is output from the light transmitter; and a corrector configured to perform a correction to one of the measured signal output from the light receiver and a demodulated signal output from the demodulator, using the correction data stored in the storage.

公开(公告)号：EP2966426A1

公开(公告)日：2016-01-13

申请号：EP15172098.4

申请日：2015-06-15

申请人： Yokogawa Electric Corporation

发明人： Takeuchi, Nobuaki

IPC分类号： G01K11/32

CPC分类号： G01K11/32 ,  G01K2011/322 ,  G01K2011/324

摘要： An optical fiber temperature distribution measuring device includes: an optical fiber as a sensor; a calculation control unit for measuring a temperature distribution along the optical fiber based on an intensity ratio between Stokes light and anti-Stokes light of backward Raman scattered light from the optical fiber; and a temperature correction unit for correcting the temperature distribution by using temperature dependence of a loss difference between the Stokes light and the anti-Stokes light.

摘要翻译： 一种光纤温度分布测量装置，包括：作为传感器的光纤; 计算控制单元，用于基于来自所述光纤的后向拉曼散射光的斯托克斯光和反斯托克斯光之间的强度比来测量沿着所述光纤的温度分布; 以及温度校正单元，用于通过使用斯托克斯光和反斯托克斯光之间的损失差的温度依赖性来校正温度分布。

公开(公告)号：EP2772738A3

公开(公告)日：2015-01-21

申请号：EP14156038.3

申请日：2014-02-20

申请人： Yokogawa Electric Corporation

发明人： Shida, Hideo

IPC分类号： G01K11/32

CPC分类号： G01K11/32 ,  G01K2011/324

摘要： An optical fiber temperature distribution measurement device configured to receive Raman back scattering lights obtained by inputting a pulsed light into an optical fiber and to measure a temperature distribution along a longitudinal direction of the optical fiber is provided. The device includes a first filter device. The first filter device includes: a threshold value setting circuit configured to set a threshold value in accordance with a change in an amount of noise overlapped with a measured signal, the measured signal indicating one of an intensity distribution and a temperature distribution of the Raman back scattering lights along the longitudinal direction of the optical fiber; a filter configured to eliminate a frequency component of the measured signal, the frequency component being larger than a predetermined first frequency; a determination circuit configured to determine if the measured signal is over the threshold value; a synthesizing circuit configured to select and synthesize one of the measured signal processed by the filter and the measured signal unprocessed by the filter in accordance with a determination result from the determination circuit.

摘要翻译： 提供了一种光纤温度分布测量装置，该光纤温度分布测量装置被构造成接收通过将脉冲光输入到光纤中而获得的拉曼背散射光并且测量沿着光纤的纵向的温度分布。 该装置包括第一过滤装置。 第一滤波器装置包括：阈值设置电路，被配置为根据与测量信号重叠的噪声量的变化设置阈值，所述测量信号指示拉曼返回的强度分布和温度分布之一 沿着光纤的纵向散射光; 滤波器，被配置为消除所述测量信号的频率分量，所述频率分量大于预定的第一频率; 确定电路，其被配置为确定所测量的信号是否超过所述阈值; 合成电路，被配置为根据来自判定电路的判定结果来选择并合成由滤波器处理的测量信号和由滤波器未处理的测量信号中的一个。

公开(公告)号：EP2752648A2

公开(公告)日：2014-07-09

申请号：EP14150217.9

申请日：2014-01-06

申请人： Kidde Technologies, Inc.

发明人： Smith, Paul D. ,  Rennie, Paul ,  Dutson, Beth A.

IPC分类号： G01K5/48 ,  G01K11/32

CPC分类号： G01K11/32 ,  G01K5/483 ,  G01K11/3206 ,  G01K2011/322 ,  G01K2011/324

摘要： A temperature sensing system 10 comprises an optical waveguide 102, a shape memory alloy (SMA) element 106a, and an interrogator 12. The SMA element 106a is deformable as a function of temperature and at least partially surrounds the optical waveguide 102. The interrogator 12 is configured to detect distributed temperature along the optical waveguide 102 using spectroscopy and to detect strain in the optical waveguide 102 induced by deformation of the SMA element 106a to identify local hot spots along the optical waveguide 102.

摘要翻译： 温度感测系统10包括光波导102，形状记忆合金（SMA）元件106a和询问器12.SMA元件106a可以作为温度的函数变形，并且至少部分地围绕光波导102。询问器12 被配置为使用光谱法检测沿着光波导102的分布温度，并且检测通过SMA元件106a的变形而引起的光波导102中的应变，以识别沿着光波导102的局部热点。

公开(公告)号：EP2017593A2

公开(公告)日：2009-01-21

申请号：EP08012176.7

申请日：2008-07-05

申请人： LIOS Technology GmbH

发明人： Fromme, Martin

IPC分类号： G01K11/32

CPC分类号： G01K11/32 ,  G01K2007/166 ,  G01K2011/324 ,  G01K2213/00 ,  G01M11/3172 ,  G01S7/493 ,  G01S17/325

摘要： The invention relates to a method and system for determining a physical property for determining physical property as a function of position, where a data series is obtained by FMCW. The data series comprises data points from one or more channels and the method comprises measuring a number of data points corresponding to Nda different values of frequency of modulation, performing one or more processing step comprising at least part of said primary data series to obtain at least one secondary data series comprising N (N> Nda) data points for the values of frequency of modulation, performing a transformation of said secondary data series from frequency domain to obtain at least one back scattering curve in space domain and optionally said back scattering curve(s) to one or more physical properties as a function of position.

摘要翻译： 本发明涉及用于确定物理特性以确定作为位置的函数的物理性质的方法和系统，其中数据序列由FMCW获得。 数据序列包括来自一个或多个通道的数据点，并且该方法包括测量对应于Nda个不同调制频率值的多个数据点，执行包括至少部分所述主要数据序列的一个或多个处理步骤以至少获得 一个次级数据序列包括用于调制频率值的N（N> Nda）个数据点，从频域执行所述次级数据序列的变换以获得空间域中的至少一个后向散射曲线和任选地所述后向散射曲线（ s）作为位置函数的一个或多个物理性质。

公开(公告)号：EP1166428A1

公开(公告)日：2002-01-02

申请号：EP00926758.4

申请日：2000-03-23

申请人： SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

发明人： SMITH, David, Randolph

IPC分类号： H02K11/00 ,  H02K3/00

CPC分类号： G01K11/32 ,  G01K11/3206 ,  G01K2007/166 ,  G01K2011/324 ,  G01K2205/00 ,  H01B7/32 ,  H02K3/32 ,  H02K11/20 ,  H02K11/25

摘要： A process and system for measuring and monitoring data, such as temperature and vibrations, in an electrical motor comprises a fibre optical cable (5) embedded in the electrical insulation (4) of at least one wire (3) of the motor windings which cable thus forms an elongate thermometer and/or vibration sensor.

公开(公告)号：EP2431719B1

公开(公告)日：2018-07-04

申请号：EP09844055.5

申请日：2009-12-22

申请人： Fujitsu Limited

发明人： KASAJIMA, Takeo ,  UNO, Kazushi ,  TAKEI, Fumio

IPC分类号： G01K11/32 ,  G01K15/00

CPC分类号： G01K11/32 ,  G01K15/00 ,  G01K2011/324

摘要： [Object] To measure a temperature with high accuracy by a temperature measurement system and a temperature measurement method. [Solving Means] The object is achieved by a temperature measurement system including: a laser light source 21 configured to output laser light; an optical fiber 24 installed in a temperature measurement area; and a temperature measurement unit 27 configured to acquire a measured temperature distribution of a temperature of the temperature measurement area along an installation path of the optical fiber 24 by detecting backscattered light of the incident laser light in the optical fiber 24 and to calculate a corrected temperature distribution by correcting the measured temperature distribution, wherein the temperature measurement unit 27 sequentially makes a correction for the measured temperature distribution a plurality of times so as to make a square error between a convolution of a transfer function of the optical fiber 24 along the installation path and the corrected temperature distribution and the measured temperature distribution smaller in each of the corrections, and the temperature measurement unit also replaces a corrected temperature at a specific point of the installation path with an estimated temperature at the specific point in each of the corrections.

公开(公告)号：EP3134615A4

公开(公告)日：2018-01-03

申请号：EP15783518

申请日：2015-03-19

申请人： BAKER HUGHES INC

发明人： MITCHELL IAN ,  JOHNSTON WILLIAM ,  CHANDRAN ASHWIN

IPC分类号： E21B47/07 ,  E21B47/12 ,  G01V9/00

CPC分类号： G01K11/32 ,  E21B47/065 ,  E21B47/123 ,  G01K2011/324

摘要： A distributed temperature sensor, a method of determining temperature, and a processing system to compute temperature are described. The sensor includes an optical fiber disposed in an area where temperature is to be measured, a primary light source to inject light into the optical fiber, and a secondary light source to inject light into the optical fiber. The sensor additionally includes a photodetector to detect backscatter light energy from the optical fiber the backscatter light energy including Stokes Raman scatter or anti-Stokes Raman scatter and primary Rayleigh scatter resulting from the primary light source and secondary Rayleigh scatter resulting from the secondary light source, and a processor to determine temperature based on a ratio of the Stokes Raman scatter or the anti-Stokes Raman scatter and a combination of the primary Rayleigh scatter and the secondary Rayleigh scatter.

公开(公告)号：EP2975373B1

公开(公告)日：2016-12-14

申请号：EP15175636.8

申请日：2015-07-07

申请人： Yokogawa Electric Corporation

发明人： Nishio, Yuuji

IPC分类号： G01K11/32

CPC分类号： G01K11/32 ,  G01K15/005 ,  G01K2011/324

摘要： An optical fiber temperature distribution measuring device includes: an optical fiber as a sensor; a light source for outputting, to the optical fiber, signal light which has been amplified by excitation light; a temperature distribution calculation unit for measuring a temperature distribution along the optical fiber by using backward Raman scattered light from the optical fiber; an ASE light intensity variation measurement unit for measuring an intensity variation of an ASE light generated at the light source; and a temperature distribution correction unit for correcting the temperature distribution based on a measurement result of the ASE light intensity variation measurement unit.