摘要
本文介绍一种新的轻便数字地震仪ＤＡＳ１。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０６５Ｗ。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.
出处
《中国地震》
CSCD
北大核心
1999年第2期159-166,共8页
Earthquake Research in China
