公开(公告)号：EP2772738B1

公开(公告)日：2019-04-17

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

公开(公告)号：EP2977734A1

公开(公告)日：2016-01-27

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.

摘要翻译： 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，用于通过使用来自光纤的反向拉曼散射光来测量沿着光纤的温度分布; 远端位置色散特性计算单元，用于获得光纤在其远端位置的色散特性; 每单位长度色散特性计算单元，用于基于在其远端位置处的光纤的色散特性获得光纤的每单位长度色散特性; 以及校正参数计算单元，用于基于沿着光纤的不同位置的每个的色散特性来计算用于校正光纤的色散特性的校正参数。

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：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：EP2775278A2

公开(公告)日：2014-09-10

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：EP3211391A1

公开(公告)日：2017-08-30

申请号：EP17157765.3

申请日：2017-02-24

申请人： Yokogawa Electric Corporation

发明人： Shida, Hideo

IPC分类号： G01K13/08

CPC分类号： G01M99/002 ,  B65G15/00 ,  B65G43/00 ,  B65G2203/044 ,  G01K11/32 ,  G01K13/08 ,  G01K2011/324 ,  G01M13/00

摘要： An optical fiber temperature distribution measurement system includes a temperature difference calculator configured to calculate a temperature difference between corresponding spatial resolution zones based on a first temperature distribution obtained by a return light from a first optical fiber part and a second temperature distribution obtained by a return light from a second optical fiber part, and an abnormality detector configured to calculate a temperature difference for evaluation for each spatial resolution zone, the temperature difference for evaluation being a sum of a temperature difference of each spatial resolution zone and a temperature difference of a spatial resolution zone adjacent thereto, and to determine that an abnormality has occurred in a roller near the spatial resolution zone when the calculated temperature difference for evaluation exceeds a reference value.

摘要翻译： 一种光纤温度分布测量系统，包括：温度差计算器，被配置为基于通过来自第一光纤部件的返回光获得的第一温度分布和通过返回光获得的第二温度分布来计算相应空间分辨率区域之间的温度差 以及异常检测器，其被配置为计算用于每个空间分辨率区的评估的温度差，所述用于评估的温度差是每个空间分辨率区的温度差与空间分辨率的温度差的总和 并且当计算出的用于评估的温差超过参考值时，确定在空间分辨率区域附近的辊子中发生异常。

公开(公告)号：EP2775278A3

公开(公告)日：2015-01-21

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.

摘要翻译： 提供一种用于测量沿光纤的长度方向的温度分布的光纤的温度分布测量装置。 该装置包括：光发射器被配置为输入串的码调制的光脉冲到光纤中; 光接收器被配置为接收拉曼背散射通过输入的代码调制的光脉冲到光纤中的火车产生的光; 解调器被配置成从所述光接收器和一个带型进行基于光发射机的调制代码相关联的代码串输出的测量信号之间执行相关处理，并解调该信号测量;对 一个存储器，存储校正数据被用来校正由所述光接收器当一个脉冲的脉冲光从光发射器输出的输出所测量的信号的失真; 和一个校正器被配置为执行校正，以来自光接收器和从解调器输出的解调信号输出所测量的信号中的一个，使用存储在存储装置中的校正数据。

公开(公告)号：EP2772738A2

公开(公告)日：2014-09-03

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： 提供了被配置为接收由输入脉冲光进入光纤，以获得的拉曼反向散射光和以测量沿光纤的长度方向的温度分布的光纤的温度分布测量装置。 该装置包括第一滤波装置。 第一滤波器装置包括：被配置成设置在雅舞蹈的阈值与噪声量中的变化与测量的信号重叠的阈值设定电路，所测量的信号指示的强度分布的一个和所述拉曼的温度分布回 散射沿着光纤的纵向方向灯; 配置为消除所测量的信号的频率成分的滤波器，所述频率分量比预定第一频率大; 确定电路被配置为确定矿如果测量的信号超过所述阈值; 合成配置为选择并合成由过滤器和由滤波器在雅舞蹈未处理来自所述判定电路的判定结果所测量的信号处理所测量的信号中的一个的电路。