抗干扰编码电法仪的实现及应用  

Implementation and applications of an coded electrical instrument with anti-interference ability

作　　者：罗先中[1,2,3] 李达为 彭芳苹 罗林涛[4] 赵金水[4] 

机构地区：[1]油气资源与勘探技术教育部重点实验室(长江大学),武汉430010 [2]中国地质调查局发展研究中心,北京100037 [3]国土资源部矿产勘查技术指导中心,北京100120 [4]北京勘察技术工程有限公司,北京100085

出　　处：《地球物理学进展》2014年第2期944-951,共8页Progress in Geophysics

基　　金：国家自然科学基金面项目"伪随机扩频脉冲在地球介质中的传播特性研究"(40774073);国土资源部公益性行业科研专项基金项目"深井物探和抗干扰电法技术研究与应用示范"(20091101704)资助

摘　　要：为了提高电法或电磁法仪器的抗干扰能力,采用伪随机编码的脉冲序列作为激励源,应用通讯领域的伪随机编码相关检测技术和信号过采样等先进技术,开发出具有强抗干扰能力的电法勘探硬件采集系统和资料处理软件系统.通过仿真检测和在不同勘探领域的实测试验,证明了该方法的可行性与有效性.实现的抗干扰编码电法仪达到了预期效果,展示了优越的抗干扰能力,可以用于城市、矿山、电站和铁路周边等强干扰地区的电法勘探.To improve the anti-interference ability of the electrical and electromagnetic survey instrument, a coded pseudo-random pulse sequence is used as the driving source, and a set of data acquisition hardware system for electric or electromagnetic survey has been developed. The algorithms of data processing and software implementation are based on the technologies of correlation detection of pseudo-random sequences and over sampling which have been used successfully in communication for anti-interference improvement. The effectiveness of the hardware and software system is proved through a series of laboratory simulation test and field tests of various survey sites, and superior anti-interference ability has been exhibited through comparison tests. It is suitable for surveys in strong anti-interference environment, such as mining area, near power station or railway, urban and suburb area, etc.

关 键 词：伪随机编码 相关检测 过采样 抗干扰 电法仪器 

分 类 号：P631[天文地球—地质矿产勘探]