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首页> 外文期刊>Smart Materials & Structures >A novel temperature-insensitive fiber Bragg grating sensor for displacement measurement
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A novel temperature-insensitive fiber Bragg grating sensor for displacement measurement

机译：用于位移测量的新型温度不敏感光纤布拉格光栅传感器

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摘要

This paper presents the design and development of an optical fiber Bragg grating based displacement sensor. A fiber Bragg grating is glued at a slant orientation onto the lateral side of a specially designed cantilever beam. It is found that the bandwidth of the FBG based sensor changes linearly with the variation of the displacement at the free end of the beam due to the displacement-induced strain gradient. Displacement sensing is realized by measuring the reflected optical power of the signal from the grating with a photodetector. A linear response of 37.9 mV mm(-1) was obtained within a displacement range of 9.0 mm. This sensor is also cost-effective due to the use of a simple demodulation method and is inherently temperature insensitive, eliminating the need for temperature compensation.
机译：本文介绍了基于光纤布拉格光栅的位移传感器的设计和开发。布拉格光纤光栅以倾斜方向粘贴到特殊设计的悬臂梁的侧面。已经发现，由于位移引起的应变梯度，基于FBG的传感器的带宽随着光束自由端位移的变化而线性变化。位移感测是通过用光电探测器测量来自光栅的信号反射光功率来实现的。在9.0 mm的位移范围内获得37.9 mV mm（-1）的线性响应。由于使用简单的解调方法，该传感器也具有成本效益，并且固有地对温度不敏感，因此无需温度补偿。

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