作者：许艺青¹, 杨晓翔^2,3, 韦铁平⁴, 姚进辉⁵

作者单位：1. 福州大学石油化工学院, 福建 福州 350116;
2. 福州大学机械工程及自动化学院, 福建 福州 350116;
3. 泉州师范学院, 福建 泉州 362000;
4. 福建工程学院机械与汽车工程系, 福建 福州 350118;
5. 福建省计量科学研究院, 福建 福州 350003

关键词：电阻应变片;敏感栅;正交试验;有限单元法;应变传递

摘要：

电阻应变片作为电阻应变式传感器的重要组成部分，其结构参数对传感器的测量精度影响较大。基于正交试验法设计试验方案，建立等强度梁、基底、敏感栅的三维模型，采用ANSYS有限元软件进行模拟分析，研究电阻应变片敏感栅结构参数对传感器应变传递误差的影响。结果表明：应变片敏感栅的弹性模量和栅丝厚度越小，栅丝长度越长，误差越小，栅丝间距存在最优值；栅丝长度对应变传递误差的影响最大，栅丝间距最小；当敏感栅材料为康铜，栅丝厚度0.003 mm，栅丝长度4 mm，栅丝间距0.28 mm，应变传递误差达到最小为0.19%，研究结果对传感器和电阻应变片的设计具有理论指导意义。

Optimization of strain gauge structure parameters based on orthogonal test

XU Yiqing¹, YANG Xiaoxiang^2,3, WEI Tieping⁴, YAO Jinhui⁵

1. School of Petrochemical Technology, Fuzhou University, Fuzhou 350116, China;
2. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China;
3. Quanzhou Normal University, Quanzhou 362000, China;
4. School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China;
5. Fujian Province Institute of Metrology, Fuzhou 350003, China

Abstract: As an important part of the resistance strain sensor, the resistance strain gauge has great influence on the measurement accuracy of the sensor. Based on the orthogonal test method, three-dimensional model of uniform strength beam, base and sensitive grid was built, simulation analysis was carried out by adopting ANSYS finite element software, and the influence of the structure parameters of the resistance strain gauge on the strain transmission error of the sensor was studied. The results show that the smaller the elastic modulus of sensitive grid of strain gauge and the thinner the thickness of grid wire is, the longer the length of grid wire will be, and the smaller the error is and the distance between grid wires is optimal. The influence of grid length on strain transfer error is the greatest and spacing of grid is minimal. When the sensitive grid material is constantan, the grid wire thickness is 0.003 mm, the grid wire length is 4 mm, the spacing between grid wires is 0.28 mm, and the strain transfer error reaches a minimum of 0.19%. The results are of theoretical significance to the design of sensor and resistance strain gauge.

Keywords: resistance strain gauge;sensitive grid;orthogonal test;finite element method;strain transfer

2018, 44(6): 129-133  收稿日期: 2017-10-11;收到修改稿日期: 2017-12-29

基金项目: 福建省青年自然科学基金（2017J05071）；福建省教育厅科研项目（JAT160318）

作者简介: 许艺青(1991-),女,福建漳州市人,硕士研究生,专业方向为负荷传感器优化设计。

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