光纤光栅传感弱信号探测电路的设计与优化  

Design and Optimization of Fiber Bragg Grating Sensing Weak Signal

作　　者：魏钧涛 姜明顺[1] 张法业[1] 张雷[1] 隋青美[1] 

机构地区：[1]山东大学控制科学与工程学院,山东济南250061

出　　处：《仪表技术与传感器》2017年第1期181-183,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61174018;41472260;61505097);山东大学基本科研业务费资助项目(2014YQ009)

摘　　要：光纤光栅信号的探测电路设计是实现物理量高精度检测的重要环节。针对高频、高灵敏度、高信噪比的检测需求,利用负向偏置的光电二极管和运算放大器设计了光电转换电路,滤波电路采用压控电压源二阶低通巴特沃斯型滤波器,频率响应范围为0~200 k Hz。实验结果表明,电路对静态和动态冲击信号都有较好的检测效果且保持较高的信噪比,为进一步信号的分析和处理提供了良好的前提。Detection circuit design of FBG signal was the primary step to realize physical high precision detection.Aiming at detection request of high frequency, high sensitivity and high SNR, Negative biasphotodiode and operational amplifier were used to design the photovoltaic conversion circuit. Filter circuit adopted the voltage-eonrolled voltage source type second-order low-pass butterworth filter,whose frequency response range was 0 to 200 kHz.Experimental results show that circuit for static and dynamic impact signal has good detection efect. Besides, it has high signal to noise ratio.thus providing good premise for the signal furthera- nalysis and processing.

关 键 词：光纤光栅 信号探测 信号放大 光电转换 滤波电路 电路设计 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]