人工地震测深和天然地震流动观测兼用的轻便数字地震仪系统  

Portable Digital Seismic Data Acquisition System for Deep Seismic Sounding and E arthquake Survey

作　　者：原秦喜[1] 孙鸿[1] 戴鹏[1] 安培兴[1] 祝彦杭[1] 崔荣丰[1] 

机构地区：[1]中国地震局地球物理勘探中心

出　　处：《中国地震》1999年第2期159-166,共8页Earthquake Research in China

摘　　要：本文介绍一种新的轻便数字地震仪ＤＡＳ１。其设计特点是：双微处理器硬件结构；过采样ＡＤ转换技术的运用；线性相位和最小相位ＦＩＲ数字滤波的运用；大容量ＣＭＯＳ快闪存贮器作数据存储介质；ＧＰＳ授时和内部高精度数字钟相结合的时间服务系统；采集器功耗低于０６５Ｗ。该仪器有３个信号输入通道，０～４０Ｈｚ的带宽和１６位字长。The portable digital seismic acquisition system (DAS 1),which was developed by th e Research Center of Exploration Geophysics of China Seismological Bureau(CSB),i s presented in this paper. This system features three channels of recording with 16 bit Σ Δ AD converto r.The bandwidth of the system is 0～40Hz. Another characters of DAS 1 are as follows:Two microprocessor are used;Linear o r minimum phase FIR filter can be selected;Acquired data are stored in CMOS Flash Memory;The time service system consists of an external GPS receiver and an inte rnal clock;Power consumption of acquisition unit is less than 0 65W.There are 3 trigger mode (timed,event and continuos) to be selected.Therefore,DAS 1 can be deployed in portable surveys for both DSS and earthquake observations.

关 键 词：采样 FIR滤波 GIS 人工地震测深 天然地震观测 

分 类 号：P631.4[天文地球—地质矿产勘探] P315.7[天文地球—地质学]