高密度电法仪数据采集系统的设计  

Design of High-density Electrical Method Data Acquisition System

作　　者：何刚[1] 王君[1] 张碧勇[1] 李萌[1] 马超[1] 

机构地区：[1]吉林大学仪器科学与电气工程学院,吉林长春130061

出　　处：《仪表技术与传感器》2014年第8期18-19,34,共3页Instrument Technique and Sensor

摘　　要：传统电法仪器只考虑测量AB电极电流和MN电极电压,而对AB电极电压很少考虑。针对这一不足,设计并实现了高密度电法数据采集系统。通过在传统电法仪器基础上增加一路AB电极电压的测量通道,实现了同时采集3个通道信号;增设一路AB电极电压的测量通道,除了对AB电极电压进行监测外,还解决了通过AB电极的电流计算得到AB电极的电压,进而引入大地的噪声,对数据处理分析精度有影响的问题;通过微处理器控制三通道24位A/D转换电路,用来实现地电模拟信号的数字转化功能。实验结果表明:设计的数据采集系统所测电阻曲线与实际电阻曲线一致,精度高、稳定性好。Traditional method only consider measuring AB electrode current and MN electrode voltage, seldom consider for AB electrode voltage. Aiming at this shortage, this paper designed and implemented a data acquisition system of high-density electrical method. By the means of increasing AB electrode voltage measurement channel on the traditional electrical instrument, this paper realized the collection of three channel signals at the same time. Besides,in addition to the AB electrode voltage monitoring func- tion,it also calculated AB electrode voltage solved by AB electrode current, and then introduced the noise of the earth which affect- ed precision of data processing analysis. Through the microprocessor control of three-channel 24 A/D conversion circuit to imple- ment electrical analog signal digital conversion function. The experimental results show that the resistance curve measured by this data acquisition system is consistent with the actual measured, and the system has high precision and good stability.

关 键 词：高密度电法数据采集系统 AB电极电流 MN电极电压 AB电极电压 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]