多通道应变仪自动标定系统设计  

Design of auto-calibration system for multi-channel strain gauge

作　　者：徐丽娇[1] 刘翔[1] 吉小军[1] 

机构地区：[1]上海交通大学仪器科学与工程系,上海200240

出　　处：《工矿自动化》2016年第3期31-35,共5页Journal Of Mine Automation

基　　金：国家自然科学基金项目(51475306)

摘　　要：针对现有的应变测量仪标定方式采用单通道手动操作,存在标定过程费时费力、效率较低等问题,设计了一种以Cortex-M3为控制核心的自动标定系统,详细介绍了该系统的硬件和软件设计。该系统可将标准电阻信号输出加载到被标定电桥的输入端,比对被标定电桥的输出与理论值,自动计算被标定电桥的精度。实验结果表明,该系统能够有效完成自动标定任务,标定精度达到0.5%。In view of problem of wasting time and energy and low efficiency in calibrating process of existing calibration method of strain gauges which adopts single-channel manual operation mode, an auto- calibration system based on cortex-M3 MCU was designed, hardware and software design of the system were introduced in details. The system can output standard resistance signal to input terminal of calibration bridge , and can automatically compute precision of calibrate bridge through comparison value between actual outputs and theoretical outputs. The experimental results show that the system can perform auto-calibration of strain gauge efficiently with calibration precision at 0.5 %.

关 键 词：多通道应变仪 信号源发生器 应变测量 自动标定 惠斯登电桥 

分 类 号：TD178[矿业工程—矿山地质测量]