频谱整形技术在采集系统中的应用

Application of Spectrum Shaping Technology in Seismic Acquisition System,

遥测数字地震仪 I/O系统 ( )的采集系统中采用了频谱整形技术 ,这一技术使采集站前放增益随信号频率升高 ,以 6 d B/oct的速率递增 ,从而补偿了因大地吸收效应造成的高频损耗。

During the seismic data acquisition,the high frequency component of the deep reflected wave is seriously attenuated because of the absorption effect of the earth.The performance range is decreased.The resolution and effective depth are affected.The spectrum shaping technology is applied to acquisition system of telemetric seismic instruments.It makes that the preamplifiers gain is increased at 6 dB/oct ratio with increasing in signal frequency,and makes compensation for high frequency lossed due to earth attenuation.