应变片排布位置对柱式力传感器输出影响  

Influence of strain gauge layout on the output of column type force transducer

作　　者：梁伟[1,2] 韦铁平 杨晓翔 赖征创[1] 姚进辉 Liang Wei;Wei Tieping;Yang Xiaoxiang;Lai Zhengchuang;Yao Jinhui(School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China;Fujian Metrology Institute, Fuzhou 350003, China;School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China)

机构地区：[1]福州大学机械工程及自动化学院,福州350116 [2]福建省计量科学研究院,福州350003 [3]福建工程学院机械与汽车工程学院,福州350118

出　　处：《仪器仪表学报》2019年第5期132-143,共12页Chinese Journal of Scientific Instrument

基　　金：国家质量监督检验检疫总局科技计划(2015QK295);福建省质量技术监督局科技项目(FJQI2015029);福建省青年自然科学基金(2017J05071)项目资助

摘　　要：研究偏心、倾斜载荷作用下,应变片排布位置对柱式力传感器输出的影响,对提高传感器抗偏心、倾斜载荷能力具有重要作用。采用弹性理论建立了偏心、倾斜载荷作用下,考虑应变片位置偏差、角度偏差、高度位置影响的柱式传感器输出模型。基于该模型,分别讨论了应变片位置偏差、角度偏差和高度位置对传感器示值误差和方位误差的影响,并进行实验验证。研究结果表明,当应变片之间存在位置偏差或应变片存在角度偏差,传感器在偏心、倾斜载荷作用下,将产生较大示值误差和方位误差,且误差随位置偏差或角度偏差的增大而迅速增大。应变片粘贴时,如果位置偏差和角度偏差均不大于1°,则即使传感器在0.1°倾斜载荷作用下,示值误差也可以控制在±0.15%以内。贴片高度位置变化对传感器输出的影响较小。该力传感器输出模型分析结果准确可靠,对控制传感器生产工艺水平具有一定指导作用。Studying the influence of the strain gauge layout on the output of the force transducer under eccentric and tilting loading is very important to enhance the anti-eccentric and tilting loading ability of the transducer. In this paper, using the theory of elasticity, the output model of the column force transducer under eccentric and tilting loading is established considering the influence of the position deviation, angle misalignment and height location of the strain gauges. Based on the model, the influences of the position deviation, angle misalignment and height location on the indication error and direction error are discussed, respectively. The verification experiments were carried out. Study results show that under eccentric and tilting loading, when position errors exist among the strain gauges or angle misalignment of the strain gauges exists, large indication error and direction error occur. The indication error and direction error increase sharply as the position deviation and angle misalignment increase. When attaching the strain gauges, if the position deviation and angle misalignment are both not greater than 1 degree, the indication error could be controlled within ±0. 15% even the transducer is under the tilting loading of 0. 1 degree. The height location variation of the strain gauge has a little effect on the output of the transducer. The analysis results of the developed force transducer output model are accurate and reliable, which can be a guidance to control the manufacture processing of the force transducers.

关 键 词：应变片 力传感器 寄生分量 示值误差 

分 类 号：TH82[机械工程—仪器科学与技术]