摘要
应变测量技术在测量机械构件受力变化特征和重要工程结构监测中发挥着不可替代的作用。在传统应变测量电路的外接增益电阻和高阶滤波电路中,电阻温漂特性产生的测量误差一直是亟待解决的问题。设计了一款基于程控式放大器AD8231,24位数模转换器AD1256,RAM处理器的高精度应变测量系统方案;通过电路优化,实现了电阻温漂补偿从而提高测量精度的目的。试验结果表明该应变测量系统方案的测量精度高达0.1με。
Strain measurement technology plays an irreplaceable role in measuring the variation characteristics of mechanical components and the monitoring of important engineering structures. However in the external gain resistance and high order filter circuits of traditional strain measurement circuits,the measurement error caused by the resistance temperature drift is always an urgent problem to be solved. A high precision strain measurement system based on the programmable amplifier AD8231,24 digital/analog converter AD1256,RAM processor is designed. Through circuit optimization,the temperature drift problem is well compensated. As a result the measurement accuracy gets great improvement. The experimental results show that the precision of the strain measurement system is up to 0.1 με.
作者
陈诚
李建青
马争争
戴亚文
陈子鹏
CHEN Cheng;LI Jian-qing;MA Zheng-zheng;DAI Ya-wen;CHEN Zi-peng(School of Science,Wuhan University of Technology,Wuhan 430070,China;School of Information Engineering,Zhongnan University of Economics and Law,Wuhan 430073,China)
出处
《自动化与仪表》
2019年第2期43-46,61,共5页
Automation & Instrumentation
基金
湖北省高新技术专项项目(2016lg0097)
作者简介
陈诚(1993—),男,在读硕士研究生,研究方向为应变测量。
