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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。
In order to carry out artificial seismic sounding better, a portable multi-channel digital observation system was developed, which consists of a pickup, a pre-amplification filter, a pair of timing devices and a multi-channel digital data acquisition recorder SCJ-8. The main performance is: 1-8 input channels; bandwidth of 2-30Hz; dynamic range of about 110db; A / D and D / A are 12 bits; nonlinear distortion of about 0.5%; crosstalk about-90db; waiting for work Consumption of about 2W; recording power consumption of about 6W; can output both digital and analog data, can be directly interfaced with the computer; time service with crystal digital clock; a variety of control and monitoring capabilities. Experimental observations show that the system has good performance, full function and basically reliable work. It has reached the original design requirements and added a new observation and recording instrument for artificial seismic sounding. In this paper, the system host SCJ-8 is introduced in detail, and the seismic waveform recorded by the system in the field experiment is given.