多通道应变仪自动标定系统设计

基金项目:

国家自然科学基金项目（51475306）

详细信息

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

Department of Instrument Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China

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%。
- 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
Abstract: 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%.
- multi-channel strain gauge /
- signal generator /
- strain measurement /
- auto-calibration /
- Wheatstone bridge