强度调制型光纤传感器用电路研究

在强度调制型光纤传感器中，光源发光强度和光电接收器工作的稳定性，是决定测量精度的关键因素。设计了具有软启动功能和恒亮度控制的光源驱动电路，所用光电接收器能满足测量系统要求。实验表明，该电路软启动效果明显，能抑制电压波动冲击，输出电压稳定度优于0.8%，为提高该类传感器测量精度提供了有效的手段。
关键词：光纤传感器；电路；强度调制；光电接收器
Abstract: In intensity-modulated type optic fiber sensors, luminous intensity of a light source and operating stability of photoelectric receiver are the key factors for determining measuring accuracy. A light source driving circuit with soft starting function and constant brightness control is designed and used photoelectric receiver can fulfill the demands of the measuring system. The experiments show that the soft driving effectiveness of the circuit is obvious. It can inhibit the shock of voltage fluctuation and output voltage stability is better than 0.8%, thus provides an effective means for improving the measuring accuracy of this kind of sensors.
Key words: Optical fiber sensors；Circuits；Intensity modulation；Photoelectric receiver