公开(公告)号：US4260883A

公开(公告)日：1981-04-07

申请号：US012026

申请日：1979-02-14

申请人： Seiichi Onoda ,  Shoji Yamada ,  Yasuo Minai ,  Minoru Maeda ,  Shin Kita ,  Mitsuo Tanaka

发明人： Seiichi Onoda ,  Shoji Yamada ,  Yasuo Minai ,  Minoru Maeda ,  Shin Kita ,  Mitsuo Tanaka

IPC分类号： G01D5/26 ,  G01F23/292 ,  G01L9/00

CPC分类号： G01F23/292 ,  G01D5/268 ,  G01L9/0007 ,  G01L9/0077

摘要： An optical measurement system for eliminating the influences of time variations on light sources, transmission lines, photo detectors, etc. The system includes light sources which generate two pulse-shaped optical signals of different light wavelengths with a portion of the optical signals being transmitted to a measuring part in a distant place by a transmission line. In the measuring part, a change of a measured object is converted into a variation in the quantity of transmission of light, and the optical signal subjected to the variation is transmitted to a signal processing portion by a transmission line. The varied optical signal is converted into a first electric signal by a photo detector. Another portion of the optical signals from the light sources is converted into a second electric signal by another photo detector. A signal processing circuit provides a measurement output indicative of the quantity of change of the measured object as a function of at least one ratio of the first and second electric signals.

摘要翻译： 一种用于消除光源，传输线，光电检测器等时间变化影响的光学测量系统。该系统包括产生两个不同光波长的脉冲形光信号的光源，一部分光信号被传输到 通过传输线在远处的测量部件。 在测量部分中，测量对象的变化被转换为光的透射量的变化，并且经过变化的光信号通过传输线传输到信号处理部分。 通过光电检测器将变化的光信号转换成第一电信号。 来自光源的光信号的另一部分由另一光检测器转换成第二电信号。 信号处理电路提供指示被测量物体的变化量的测量输出作为第一和第二电信号的至少一个比率的函数。