多道震电非周期信号测试仪的研制

震电效应研究已成为当今地球物理学界最热门的研究课题之一。与该课题相配套的测试仪器对研究工作的进展起关键作用。仪器的研制本着智能化、高精度、低噪声的设计思想 ,采用单片微型计算机作控制单元 ,以菜单设置各种采集命令 ,操作简便。具有电位和梯度两种采集方式 ,电极距为 10 0m ,测线长度为 10 0 0m。仪器启动后 ,各通道间的切换、放大、A/D、存储都是自动完成的 ,可连续采样 15h。野外测量完成后 ,可对计算机进行数据回放。在结构设计上 ,针对野外作业的特点 ,使仪器轻便化、抗震、防潮、可靠耐用 ,适应各种恶劣的野外环境。该仪器经过油田上的现场试验 ,初步证明能满足震电效应研究的技术要求。

A MULTICHANNEL TESTER FOR MEASURING NONCYCLIC SEISMOELECTRIC SIGNAL

Nowadays,the seismoelectric effect has become one of the most favorite research in geophysics.The research depends mainly on the instrument,which is characterized by intellectual faculties, high accuracy and low noise and controlled by the microcomputer. The menu contains all kinds of acquistion commands with convenient operation.Both potential and gradient can be acquired by the instrument. The distance between electrode is 100 m and length of survey line is 1000 m. The instrument can automatically implement to switch all channels, amplify, and A/D, restore after it starts up. The data playback can be done by computer after the measurement in the field. The layout of structure makes the instrument light, rugged, waterproof,and reliable in order to adapt to all bad situations in the field.Test in an oil field shows that the instrument can meet the technical demand of the research of seismoelectric effect.