Five MN force sensor based on fiber Bragg grating

Chao GAO; Bang LIU; Yong-cai GUO; Zheng-wei ZHU

doi:10.3788/OPE.20172504.0857

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Five MN force sensor based on fiber Bragg grating

Modern Applied Optics | 更新时间：2020-07-07

- Five MN force sensor based on fiber Bragg grating
- Optics and Precision Engineering Vol. 25, Issue 4, Pages: 857-866(2017)
- 作者机构：
  
  1.重庆大学光电工程学院光电技术及系统教育部重点实验室, 重庆 400030
  2.重庆大学土木工程学院山地城镇建设与新技术教育部重点实验室, 重庆 400045
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20172504.0857
  CLC： TN253;TH691.9
- Received：31 October 2016，
  
  Accepted：06 December 2016，
  
  Published：25 April 2017
- 稿件说明：
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Chao GAO, Bang LIU, Yong-cai GUO, et al. Five MN force sensor based on fiber Bragg grating[J]. Optics and precision engineering, 2017, 25(4): 857-866.
DOI：

Chao GAO, Bang LIU, Yong-cai GUO, et al. Five MN force sensor based on fiber Bragg grating[J]. Optics and precision engineering, 2017, 25(4): 857-866. DOI： 10.3788/OPE.20172504.0857.

摘要

针对山体滑坡中大力值监测的应用需求，提出了基于光纤Bragg光栅（FBG）的5 MN力值传感器。该传感器采用8根FBG构成4组光栅偶对圆柱弹性体的应变进行采集，光栅偶能有效地补偿温度对FBG尺寸的影响。通过ANSYS数值模拟计算并优化了圆柱弹性体的结构尺寸，并按照国家规程进行了传感器检定实验。实验结果表明，该传感器的直径为124 mm，长度为302 mm，应力测量范围为500~5 000 kN，综合精度为1%，最大力值对应的波长变化为2 567 pm，灵敏度为2 kN/pm。该传感器除具有光栅传感的基本特点以外还具有结构简单、量程大、精度高等优点，不仅适用于滑坡力值监测，还适用于建筑、化工、煤矿、军事等领域的力值监测。

Abstract

In view of the increasing demand for strong force value monitoring in landslide

a 5 MN force sensor based on Fiber Bragg Grating (FBG) was proposed. The sensor adopted 8 FBGs to compose 4 group of grating pair for cylindrical elastic strain collection. The grating pair can effectively compensate the effect of temperature on the size of FBG. The dimension of the cylindrical elastomer was determined and optimized via ANSYS numerical simulation. Then the force sensor was tested according to the national regulations. The experimental results show that the sensor with diameter of 124 mm and length of 302 mm

can provide a measurement range of 500-5000 kN and an overall accuracy of 1%. In addition

the wavelength variation corresponding to the maximum force value is 2 567 pm and the sensitivity is 2 kN/pm. The sensor is characterized by simple structure

large measuring range and high precision besides basic characteristics of the grating sensing. The sensor can be applied to force monitoring not only in landslide

but also in construction

chemical industry

coal mine

military and other fields.

关键词

Keywords

references

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