动态应变微光信号检测系统的设计

由光纤光栅因应变而产生的干涉光信号是比较微弱的，这样的光信号难以直接应用于对应变信号解调，为此设计了用于对微光信号进行处理的低噪声高增益高频放大电路。通过仿真验证了电路参数的合理性和可靠性，经过电路设计和相关调试，完成的光电转换前置放大和后续交流放大电路能够比较好地实现光电信号的转换和放大。对带有应变信号的电压数据进行采集处理，能够比较好地解调出动态应变变化，证明了设计的微光信号检测系统具有实用价值。

The design of dynamic strain weak light signal detection system

Optical interference signal is relatively weak which is produced by the fiber bragg grating strain, Demodulating optical signal that cannot be directly applied to the corresponding signal, The amplifier circuit of low noise, high gain and high frequency is designed to process the weak light. To verify the circuit parameters are determined by simulation, after the design and related debugging of the circuit, photoelectric conversion completed preamplifier and subsequent amplification circuit which can better realizes the photoelectric conversion and amplification. The dynamic stain signal is demodulated, The voltage data with strain signal acquisition and processing, the design of the weak light signal detection system is proved that has the practical value.