Automatic temperature monitoring technology based on fiber grating sensor

International Conference on Precision Instruments and Optical Engineering Pub Date : 2023-02-27 DOI:10.1117/12.2667908

Xinxiang Shao, Heng Zhu, Yutong Wang, Hong-Tao Jiang

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Abstract

At present, temperature sensors are relatively mature, and commercial sensors are mainly thermistors and thermocouples, which have the advantages of low cost and large temperature range. However, it is difficult to meet the requirements of some special occasions, such as strong electromagnetic interference, strong corrosiveness and other environments, and high-precision temperature measurement cannot be performed. Fiber Bragg grating is a kind of fiber optic sensor, which has the advantages of anti-electromagnetic interference resistance, corrosion resistance and high sensitivity. The fiber Bragg grating obtains sensing information by modulating the Bragg wavelength of the fiber through the change of the external temperature parameter, and can automatically monitor the temperature change of the object to be measured. In this paper, the temperature sensing test experiment of fiber Bragg grating is carried out. The results show that the center wavelength of the grating has a good linear response to the temperature of the object to be measured, and the temperature error is within ±0.5℃. temperature sensing.

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基于光纤光栅传感器的温度自动监测技术

目前，温度传感器比较成熟，商用传感器主要是热敏电阻和热电偶，具有成本低、温度范围大的优点。但难以满足一些特殊场合的要求，如强电磁干扰、强腐蚀性等环境，无法进行高精度的温度测量。光纤布拉格光栅是一种光纤传感器，具有抗电磁干扰、耐腐蚀、灵敏度高的优点。光纤布拉格光栅通过外部温度参数的变化来调制光纤的布拉格波长来获取传感信息，并能自动监测被测物体的温度变化。本文进行了光纤布拉格光栅的温度传感测试实验。结果表明，光栅中心波长对被测物体的温度有良好的线性响应，温度误差在±0.5℃以内。温度传感。

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International Conference on Precision Instruments and Optical Engineering

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