基于AMPCI9101A的光纤光栅复用传感系统研究

The Study on Multiplied Fiber Optical Grating Sensing System Based on AMPCI9101A

构建基于AMPC I9101A的复用传感系统,提出一种利用软件进行相位检测的新方案。系统采用压电陶瓷(PZT)实现相位载波调制,利用数据采集卡(AMPC I9101A)对载波信号进行采集,通过离散傅里叶变换(DFT)对相位调制信号进行检测,实现了对7路(最多可达15路)复用传感的同步、实时解调,分辨率可达2.65×10-3nm。系统利用软件处理采集信号,并对M-Z干涉仪进行了封装,有效的降低了噪声引入。系统结构简单,成本低,可同时检测静态信号和低频动态信号。

A multiplied sensors system based on AMPCI9101A is described,and a novel method of detecting phase shift which utilizes software is proposed.The system,which employs piezoelectric transducers（PZT）to achieve phase modulation,using data acquisition card（AMPCI9101A）to collect the carrier signal,through the discrete Fourier transform（DFT）to detect the phase modulation signal.The system achieves 7 channels（up to 15 channels）multiplied sensors＇ synchronization,real-time demodulation with resolution up to 2.65×10-3 nm.This system uses software to process the acquisition signal,and the MZ interferometer was encapsulated,effectively reduce the noise.This system can detect both static and dynamic signal and has a merit of simple structure and low cost.