基于ADS1256的地电阻率仪数据采集系统设计  

Design of Data Acquisition System for Geo-Electrical Resistivity Meter Based on ADS1256

作　　者：娄晓宇 张宇 张兴国 李钟慧 LOU Xiaoyu;ZHANG Yu;ZHANG Xingguo;LI Zhonghui(National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China;Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China;Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

机构地区：[1]应急管理部国家自然灾害防治研究院,北京100085 [2]中国地震局地震预测研究所,北京100036 [3]中国地震局地球物理研究所,北京100081

出　　处：《电子器件》2024年第4期891-896,共6页Chinese Journal of Electron Devices

基　　金：中央级公益性科研院所基本科研业务费专项项目(CEAIEF20220202)。

摘　　要：地震地电阻率监测目的是观测特定区域的对地电阻率随时间的变化,对测量精度要求很高。文章介绍的基于24位模数转换器ADS1256设计的地电阻率仪数据采集系统,具有高精度、低噪声、大动态和抗干扰能力强的特点,实验室测试结果表明其电压分辨力达到10μV,峰峰噪声小于7μV,动态范围达到120 dB,数据采集系统主要技术性能指标满足地震地电阻率监测预测研究的需求,也可应用于其他需要高精度、低噪声直流电压测量的领域。The purpose of seismic earth resistivity monitoring is to observe the change of geo-electrical resistivity in a specific area,which requires high measurement accuracy.The data acquisition system of geo-electrical resistivity meter is based on the 24 bit analog-to-digital converter of ADS1256.It has the characteristics of high precision,low noise,large dynamic and strong anti-interference ability.The laboratory test results show that its voltage resolution reaches 10 μV,peak to peak noise is less than 7 μV and the dynamic range reaches 120 dB.The main technical performance indicators of the data acquisition system meet the needs of seismic geo-electrical resistivity monitoring and prediction research.It can also be applied to other fields requiring high-precision,low-noise DC voltage measurement.

关 键 词：ADS1256 地电阻率测量 数据采集 低噪声 高精度 

分 类 号：TM934.15[电气工程—电力电子与电力传动]