公开(公告)号：US5113277A

公开(公告)日：1992-05-12

申请号：US542610

申请日：1990-06-22

申请人： Yasuo Ozawa ,  Nobuo Ando ,  Satoshi Yamamoto ,  Toshio Fukahori ,  Hiroyuki Kunugiyama ,  Kouichi Sugiyama ,  Teruaki Tsutsui ,  Keiichi Hashiba ,  Shigehiro Endoh ,  Hiroshi Kawakami ,  Akira Tokushima ,  Kaoru Yamazaki

发明人： Yasuo Ozawa ,  Nobuo Ando ,  Satoshi Yamamoto ,  Toshio Fukahori ,  Hiroyuki Kunugiyama ,  Kouichi Sugiyama ,  Teruaki Tsutsui ,  Keiichi Hashiba ,  Shigehiro Endoh ,  Hiroshi Kawakami ,  Akira Tokushima ,  Kaoru Yamazaki

IPC分类号： G01K11/32 ,  G02B6/24 ,  G02B6/34

CPC分类号： G02B6/2938 ,  G01K11/32 ,  G02B6/243 ,  G02B6/29362

摘要： A fiber optic distributed temperature sensor system outputs a temperature distribution along the longitudinal direction of a sensor optical fiber by measuring the temperature dependency of Raman scattered light intensity produced in an optical fiber by use of the OTDR technique. The system is characterized in that a light output from a light source is input to the sensor (optical fiber) via an optical wavelength division demultiplexer, that among the reflected light of back scattered light returning from the sensor optical fiber, light of a particular wavelength range is reflected or transmitted by at least one optical filter of the optical wavelength division demultiplexer to separate the light of the particular wavelength range and that signal of the light of the particular wavelength range is guided to a detector of an optical measuring system.

摘要翻译： 光纤分布式温度传感器系统通过使用OTDR技术测量在光纤中产生的拉曼散射光强度的温度依赖性，输出沿传感器光纤纵向的温度分布。 该系统的特征在于，从光源输出的光经由光波分复用器输入到传感器（光纤），在从传感器光纤返回的反射散射光的反射光中，特定波长的光 范围由光波分复用器的至少一个滤光器反射或透射以分离特定波长范围的光，并且将特定波长范围的光的信号引导到光学测量系统的检测器。