海底大地电磁信号采集电路的驱动程序

针对海底MT采集的特点，设计非实时智能监控驱动程序．程序可读入GPS时间，使海底大地电磁仪主控单元PC104的RTC时钟与GPS时钟在微秒级内保持一致，并能控制采集的同步启动，保证远参考测量的实现；通过读入人为设定的参数文件，实现预期的采集方式；利用数存前的级联分样剔除冗余信息；借助数据先驻留高端内存的方式降低写盘噪声。

Circuit drivers of signal-acquiring unit in seafloor magnetotelluric system

This paper discusses the design of the intelhgent drivers for non-realtime monitor mode,which suits forseafloor MT acquisition.By reading the GPS time,the drivers can synchronize the RTC clock in the main control unitPC104 of the seafloor MT instrument with the GPS time at microsecond level.This function makes it possible for dif-ferent MT systems to acquire time series in remote reference mode.The drivers realize data acquisition through read-ing the predefined parameter file,eliminate redundancy information using cascade decimation technique before savingdata,and reduce noises of writing disk in the way of keeping data be resident in high memory area before hand.