上海交通大学学报

上海交通大学学报 >

2022 , Vol. 56 >Issue 2: 214 - 222

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2020.313

光纤光栅传感器振动与温度信号解耦

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  • 上海交通大学 核科学与工程学院,上海 200240
李晗(1995-),男,山东省潍坊市人,硕士生,主要从事反应堆热工水力研究.

收稿日期: 2020-09-29

  网络出版日期: 2022-03-03

基金资助

国家自然科学基金资助项目(51306112)

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Decoupling of Vibration and Temperature Signals of Fiber Bragg Grating Sensor

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  • School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2020-09-29

  Online published: 2022-03-03

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摘要

利用单个光纤光栅(FBG)传感器开展同时测量振动与温度信号的实验,提出基于MATLAB的解耦方法分离振动与温度信号.研究结果表明:单信号测量的条件下,FBG传感器对温度的静态测量误差在±0.4 ℃以内,对振动主频动态测量的相对误差为0.5%.FBG传感器测量得到振动与温度的复合信号,通过所提解耦方法得到的振动主频相对误差为0.65%,振动幅值相对误差为7.14%,温度信号误差在±3.3 ℃以内.

关键词： 核电站信号监测; 光纤光栅传感器; 信号解耦

本文引用格式

李晗, 张波涛, 王俊杰, 孙运达, 龚圣捷 . 光纤光栅传感器振动与温度信号解耦[J]. 上海交通大学学报, 2022 , 56(2) : 214 -222 . DOI: 10.16183/j.cnki.jsjtu.2020.313

Abstract

This paper uses a single fiber bragg grating (FBG) sensor to implement an experiment to measure vibration and temperature signals at the same time, and proposes a MATLAB-based decoupling method to separate vibration and temperature signals. The experimental results show that under the condition of single signal measurement, the static temperature measurement error of the FBG sensor is within ±0.4 ℃ and the relative error of the dynamic measurement of the main frequency of vibration is 0.5%. The FBG sensor measures the composite signal of vibration and temperature. The relative error of the main vibration frequency obtained by the decoupling method proposed in this experiment is 0.65%, the relative error of the vibration amplitude is 7.14%, and the temperature signal error is within ±3.3 ℃.

Key words： nuclear power plant signal monitoring; fiber bragg grating (FBG) sensor; signal decoupling

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