基于光纤布喇格光栅传感器的精密位移测量

Exactitude Displacement Measurement Based on Fiber Bragg Grating Sensors

首先对光纤布喇格光栅传感的基本原理进行了分析,并给出了光纤光栅位移传感的基本公式.在此基础上,设计制作了一种光纤光栅位移传感器.采用光纤光栅作为传感元件,利用多波长计进行波长检测,对位移量进行了传感测量.实验中,传感器位移检测范围为0.6mm,其传感测量精度为±43nm,测量分辨率为1.5nm.实验结果具有良好的线性度.

We analyze the basic principle of displacement sensing based on fiber Bragg grating. Using one fiber Bragg grating as displacement sensor and multi-wavelength meter to demodulate the wavelength shift, we achieve high exactitude displacement measurement which is in a range of 0.6 mm with a precision of ±43 nm and a resolufion of 1.5 nm. The result has high linearity.