电压自校准的高精度多通道应变信号采集模块
High-precision Multi-channel Strain Signal Acquisition Module with Voltage Self-calibration
王浩 1王红亮 1王铮 2林宏3
作者信息
- 1. 中北大学,省部共建动态测试技术国家重点实验室
- 2. 中国运载火箭技术研究院
- 3. 北京宇航系统工程研究所
- 折叠
摘要
针对现有应变采集设备存在采集精度低、测量范围窄、通道数较少、校准繁琐等问题,设计了一种具备电压自校准的高精度多通道应变信号采集模块,模块以高精度模拟调理转换电路为核心,结合电子线路噪声理论仿真与分析,由自校准电路对采集通道进行校准,通过补偿远端传输线的激励电压,实现了48 通道大应变信号与差分电压信号的高精度测量.测试结果表明:应变信号测量范围可达±100 000 με,测量精度优于 0.05%FS;电压信号测量范围可达±15 V,测量精度优于±(0.025%RD+ 500 μV),准确度高,具备较好的稳定性和通用性.
Abstract
In view of the existing problems in the strain acquisition system,such as low acquisition accuracy,narrow measur-ing range,fewer channels and cumbersome calibration,a high-precision multi-channel strain signal acquisition module with voltage self-calibration was designed.The module was based on the high-precision analog conditioning conversion circuit as the core,com-bined with the theoretical simulation and analysis of electronic line noise,and the acquisition channel was calibrated by the self-calibration circuit.By compensating the excitation voltage of the remote transmission line,the high precision measurement of 48-channel large strain signal and differential voltage signal was realized.The practical test results show that the measuring range of strain signal can reach±100 000 με,and the measuring accuracy is better than 0.05%FS.The voltage signal measurement range can reach±15 V,the measurement accuracy is better than±(0.025%RD+500 μV),and the accuracy is high,with good stabili-ty and versatility.
关键词
应变信号采集/自校准/高精度/多通道/补偿远端激励Key words
strain signal acquisition/self-calibration/high precision/multi-channel/compensation for remote excitation引用本文复制引用
基金项目
山西省"1331工程"重点学科建设计划项目(1331KSC)
出版年
2024
NETL
NSTL
维普
万方数据