人工地震测深用携带式多道数字化观测系统

为了更好地开展人工地震测深工作,研制了携带式多道数字化观测系统,由拾震器、前置放大滤波器、对时装置和多道数字化数据采集记录器SCJ-8等组成。主要性能是:有1-8个输入通道;带宽为2-30Hz;动态范围约110db;A/D和D/A皆为12位;非线性失真约0.5％;串音约-90db;等待功耗约2W;记录功耗约6W;能同时输出数字和模拟数据,可直接与计算机接口;时间服务用晶控数字钟;有多种控制与监测功能。实验观测表明,该系统性能好,功能全,工作基本可靠,已达到原设计要求,为人工地震测深增添了新的观测记录仪器。 文中对系统的主机SCJ-8作了较详细地介绍,给出了系统在野外试验观测时记录到的地震波形。

A PORTABLE DIGITIZED MULTI-CHANNEL DATA RECORDING SYSTEM FOR DEEP SEISMIC SOUNDING

A portable digitized multi-channel data recording system was designed for deep seismic sounding. It consists of seismometers, preamplifiers and filters, a timing device and a digitized multi-channel data recorder, SCJ-8. The main features are as follows:1. Number of input channel from 1 to 8,2. Bandwidth 2-30 Hz,3. Dynamic range: 110 db,4. A/D and D/A both-12bit,5. Distortion 0.5%,6. Cross-talk -90 db,7. Consumption 2W for waiting, 6.0 W for recording,8. Crystal digital clock for timing,9. Simultaneous digital and analogue data outputs and easy to interface with computers,10. A variety of functions, such as digital display, status monitors, pre-programmed start and stop times, etc.The field experimental observations for deep seismic sounding proved that this system is of good and relible performances and has met the original demands of design.In this paper, the SCJ-8 which is the heart of this system is discribed in detail and the seismograms of the field experimental observations are given.