Hardware design of high precision wireless strain measurement system

ZHANG Shi-ming; CHEN Wei-min; ZHANG Peng; LIU Xian-ming; LEI Xiao-hua

doi:10.13873/j.1000-97872012.12.037

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Hardware design of high precision wireless strain measurement system

更新时间：2025-09-11

- Hardware design of high precision wireless strain measurement system
- Vol. 31, Issue 12, Pages: 87-90+93(2012)
- 作者机构：
  
  重庆大学光电技术及系统教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872012.12.037
  CLC： TP274
- Published：2012
- 稿件说明：
移动端阅览
[1]张仕明,陈伟民,章鹏,刘显明,雷小华.高精度无线应变测量系统硬件设计[J].传感器与微系统,2012,31(12):87-90+93.

ZHANG Shi-ming, CHEN Wei-min, ZHANG Peng, et al. Hardware design of high precision wireless strain measurement system[J]. 2012, 31(12): 87-90+93.
[1]张仕明,陈伟民,章鹏,刘显明,雷小华.高精度无线应变测量系统硬件设计[J].传感器与微系统,2012,31(12):87-90+93. DOI： 10.13873/j.1000-97872012.12.037.

ZHANG Shi-ming, CHEN Wei-min, ZHANG Peng, et al. Hardware design of high precision wireless strain measurement system[J]. 2012, 31(12): 87-90+93. DOI： 10.13873/j.1000-97872012.12.037.

摘要

无线应变测量系统无需考虑布线

装卸快速

受到人们的日益关注。但精度不够高的缺点限制了其广泛应用。提高精度的有效途径是在硬件设计时控制电路中的误差

对电路中的精度影响因素进行了系统分析

推导出电桥电压噪声、运放噪声、量化噪声与系统精度的定量关系

并提出了电路设计中各部分的精度指标。以此为依据

采用高精度恒流稳压电源

简化滤波电路等手段

设计了相应的信号处理、数据采集和无线收发电路

并选用低功耗器件以降低系统功耗。试验结果表明:该系统测量精度为0.245%

总功率最大时为178 mW

Abstract

Wireless strain measurement system has the advantage of easy to assemble and no need to consider wiring

so it gets more attention now.But the measurement precision of the existing system is low

which limits its wide application.Controlling the circuit error in hardware design is an effective way to improve precision.The influence factors on precision in circuit are analyzed.The quantitative relationship between bridge voltage noise

operational amplifier noise and quantization noise

and system precision is deduced.The precision index of each part in circuit design is presented.On basis of this

by applying high-precision constant-current stabilivolt power source

simplifying filtering circuit and some other means.Corresponding signal processing

data acquisition and wireless transmit-receiving circuit are designed

meanwhile

low power consumption devices are applied in the design.Experimental results indicate that the system precision is 0.245 %

the maximum power is 178 mW

the correlation coefficient is 0.998 and the repeatability is good

the system meets design requirements.

关键词

Keywords

references

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