Development Of 48-Channel Collected Seismic Recorder

The principle of vibrator is to introduce scattered energy to underground in a comparatively long time,and collect the energy through correlation and compress it into a narrow pulse.The Portable High-Frequency Vibrator System,developed by Key Lab of Geo-Exploration and Instrumentation(Jilin Univ),Ministry of Education,generates chirp signal and accumulates energy through a long-time bestiring.According to the characteristics of vibrator,the seismic recorder that operates on-line with vibrator must have these functions as follow:First,it must have the ability of recording a great quantity of data.Second,it must have assistant channels to sample reference signal.Third,it must have the function of data correlation in real-time.The present products of seismic recorders are generally divided into two types,distributed seismic recorders and collected ones.Restricted by memory and data transfer speed, The distributed seismic recorder can hardly meet the demand of recording a great quantity of data.Furthermore,most of domestic collected seismic recorder do not have particular assistant channels needed by vibrator and do not have the function of data correlation in real-time.The thesis aims to give a scheme of designing a 48-channel collected seismic recorder based on PCI bus,and a testing machine has been completed in the basis of the scheme.PCI bus provides a high data transfer speed,which solve the problem of transfering a mass of data in a short period of time;Moreover,two assistant channels are provided to sample reference signal;the function of data correlation in real-time is also provied in the software of the instrumental system.This paper includes totally eight chapters,in which the design process of software and hardware of the instrument and the primary testing result are given.In the first chapter,the background and significance of the research...