提出了一种反射式光纤测振系统。为克服环境、温度、光源输出、光路损耗等变化引起的漂移，它采用与反射面距离不等的两根接受光纤为参考通道，并利用两根接受光纤输出的信号比构成自补偿网络。本文给出该网络的理论依据，并介绍如何在电路设计上采用相应措施来提高稳定性和保证测试精度 A reflective optical fiber vibration measurement system is proposed. In order to overcome the drift caused by changes in environment, temperature, light source output and optical path loss, it uses two receiving optical fibers with different distances from the reflecting surface as reference channels, and uses two signal ratios of receiving optical fibers to form a self-compensating network. This paper gives the theoretical basis of the network, and describes how to adopt appropriate measures in the circuit design to improve the stability and ensure the test accuracy