公开(公告)号：US5563348A

公开(公告)日：1996-10-08

申请号：US305189

申请日：1994-09-13

申请人： Hideyo Suzuki ,  Isamu Yokoi ,  Qing Feng

发明人： Hideyo Suzuki ,  Isamu Yokoi ,  Qing Feng

IPC分类号： G01L1/00 ,  G01L1/10 ,  G08C23/04 ,  G01B11/00

CPC分类号： G01L1/103

摘要： In a stress measuring, system sensor driving power and a signal sensed by a sensor are transmitted and received in the form of a light pulse signal to thereby improve a noise resistant property as well as a measuring accuracy and reliability. The stress measuring system includes a sensor head disposed at a sensing location and a measuring device disposed at a location remote from the sensing location. The sensor head includes a sensor having a sensing section for sensing a change in stress as a change in the natural frequency of an oscillation string, an output section for outputting a light pulse sensing signal corresponding to the natural frequency sensed by the sensing section and a driving section for causing oscillation at the natural frequency of the oscillation system of the sensing section in response to a driving light pulse signal. The measuring device includes a measuring section for measuring the stress based on the frequency of the light pulse sensing signal and a creating section for creating the driving light pulse signal having the frequency following a change in the natural frequency based on the light pulse sensing signal. The sensor head is connected to the measuring device through optical fibers for transmitting at least the light pulse sensing signal and the driving light pulse signal.

摘要翻译： 在应力测量中，以光脉冲信号的形式发送和接收由传感器感测的系统传感器驱动功率和信号，从而提高抗噪声性能以及测量精度和可靠性。 应力测量系统包括设置在感测位置处的传感器头和设置在远离检测位置的位置处的测量装置。 传感器头包括传感器，传感器具有感测部分，用于感测作为振荡线的固有频率的变化的应力变化;输出部分，用于输出对应于由感测部分感测的固有频率的光脉冲感测信号;以及 驱动部分，用于响应于驱动光脉冲信号在感测部分的振荡系统的固有频率处产生振荡。 测量装置包括：测量部分，用于基于光脉冲感测信号的频率测量应力;以及创建部分，用于基于光脉冲感测信号产生具有跟随固有频率变化的频率的驱动光脉冲信号。 传感器头通过光纤连接到测量装置，用于至少传输光脉冲感测信号和驱动光脉冲信号。