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光纤光栅传感器具有体积小、灵敏度高以及电器绝缘性等优点,本文结合光纤光栅传感原理,设计了一种基于磁致伸缩材料调节布拉格光栅的光电流传感器,并从理论分析和计算机仿真方面进行了研究。论文针对传感信号的特点,采用了基于可调谐F-P滤波器的解调方案,并采用单片机进行信号处理及控制的方法,从而达到使用的目的。最后对系统进行了仿真,并对温漂造成的误差进行了理论分析,证明了温漂是造成系统误差的一个重要因素。
Fiber Bragg Grating sensors have the advantages of small size, high sensitivity and electrical insulation, etc. In this paper, a novel optical current sensor based on FBG sensing principle is designed, which is based on the magnetostrictive material to adjust the Bragg grating. The theoretical analysis and computer simulation Study. In view of the characteristics of the sensor signal, this paper adopts the demodulation scheme based on the tunable F-P filter, and adopts the method of single chip microcomputer for signal processing and control so as to achieve the purpose of use. Finally, the simulation of the system is carried out, and the theoretical analysis of the error caused by temperature drift is made. It is proved that temperature drift is an important factor of system error.