地震学报Issue(5)：853-864,12.DOI:10.11939/jass.2015.05.013
地电阻率交流观测中信号检测方法研究
SignaI detection method for AC geo-resistivity observation
摘要
Abstract
In the past ten or twenty years,more and more geo-resistivity obser-vation stations are being faced with increasingly electromagnetic interference, such as subway and rail traffic system in urban area,which seriously affects the quality of observation data.The AC geo-resistivity observation method has been found to be effective to solve this problem and can be used for earthquake moni-toring and prediction.This paper introduced firstly the theory of the AC obser-vation method,and then three different signal detection methods,i.e .,the digital filter method,the spectrum analysis method and the correlation detection method,are used in the simulation.The analysis results are obtained by simula-ting an actual work process of AC geo-resistivity observation method.Compari-son of the relative error and relative standard deviation on the condition of different signal-noise ratio,sampling rate or sampling time shows that frequen-cy spectra method can be taken as the best method for the signal observation,providing theoretical basis for developing the AC geo-resistivity observation system.关键词
地电阻率观测/地电阻率交流观测方法/选频接收/数值模拟Key words
geo-resistivity observation/AC geo-resistivity method/frequency selective receiver/numerical simulation分类
天文与地球科学引用本文复制引用
马小溪,张宇,王兰炜,张兴国..地电阻率交流观测中信号检测方法研究[J].地震学报,2015,(5):853-864,12.基金项目
国家自然科学基金（41374127）和中国地震局地壳应力研究所基本科研业务专项（ZDJ2012-04）共同资助． （）
