基于LabVIEW的自然电位采集系统设计
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摘要
以LabVIEW开发环境和混合信号微控制器MSP430AFE251为核心,设计了适用于水文工程地质应用需要的自然电位信号采集系统。针对自然电场信号微弱、噪声高、双极性、工频干扰强、测量重复性差、野外电池供电的基本特点,设计了低功耗、高精度、高稳定性、抗工频干扰强的微弱信号采集系统;为保证对自然电位信号的实时曲线观测和数据再次分析,采用LabVIEW开发上位机程序,同时利用LabVIEW提供的自适应滤波器工具包消除噪声干扰,使信号采集更加准确。通过对整个自然电位采集系统的实际测试,表明该系统在水文工程地质自然电位信号测量应用效果优秀。
A natural potential signal acquisition system that is suitable for application of hydrological engineering geology is designed based on the Lab VIEW and micro control unit(MCU) MSP430AFE251.The weak signal acquisition system with low power consumption,high precision,high stability and strong anti power line interference is designed for the natural potential signal which is weak,strong noise,bipolarity,high power line interference and poor repeatability of field measurements.The host computer software is designed by Lab VIEW to observe real time curve and reanalyze the data.Moreover,the application of Lab VIEW adaptive filter toolkit ensures the signal sampling more accurate.The system test shows that the natural potential signal acquisition system is well placed to meet the requirements for application of hydrological engineering geology.
A natural potential signal acquisition system that is suitable for application of hydrological engineering geology is designed based on the Lab VIEW and micro control unit(MCU) MSP430AFE251.The weak signal acquisition system with low power consumption,high precision,high stability and strong anti power line interference is designed for the natural potential signal which is weak,strong noise,bipolarity,high power line interference and poor repeatability of field measurements.The host computer software is designed by Lab VIEW to observe real time curve and reanalyze the data.Moreover,the application of Lab VIEW adaptive filter toolkit ensures the signal sampling more accurate.The system test shows that the natural potential signal acquisition system is well placed to meet the requirements for application of hydrological engineering geology.
引文
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[3]马若龙,毋光荣,周锡芳.高密度电法和自然电位法在某水库大坝渗漏探测中的应用[J].大坝与安全,2015(6).
[4]孙乃泉,刘永华,杨咏梅.基于虚拟仪器技术的自然电位测量系统设计[J].仪器仪表学报,2006,27(S3):1824-1826.
[5]刘江一,李刚.精密仪用放大器INA114[J].今日电子,2001(11):13-15.
[6]蒋亚超,杨勇,李兴东,等.三种双T网络陷波电路分析与比较[J].电子技术,2011,38(1):70-72.
[7]马场清太郎.运算放大器应用电路设计[M].何希才,译.北京:科学出版社,2007.
[8]戴鹏飞,王胜开,王格芳,等.测试工程与LabVIEW应用[M].北京:电子工业出版社,2006.
[9]危淑平,摆玉龙,许国威.基于LabVIEW的自适应滤波器设计与研究[J].网络新媒体技术,2011,32(3):12-17.