光功率推动电容式光纤压力测量仪的研究

An Optically—powered Capacitance Pressure instrumentation with optical Fiber Link

本文介绍了光纤传输光功率推动差动电容敏感探头电路工作的原理,以及光电脉位调制测量信号的方法。讨论了光反馈、信号比值运算等技术措施对系统性能指标的改善。

This paper presents the principle of optically—powered differencial capacitance sensor circuit and the measuring signal. The method of photo—electronic pulse—position modulated (PPM) measuring signal. The accuracy and stability of the system are improved by light feedback of source and ratio measurement of signal processing.