多频CSAMT观测系统的数据采集

Data Acquisition of Multi-Frequency CSAMT Observation System

为提高观测效率和精度 ,本文提出了多频 CSAMT观测是方案 ,使 CSAMT工作时 ,一次能同时发射与接收多种频率成分的电磁波 .为实现多频观测 ,本文采用模拟傅氏变换技术 ,通过对待测频率信号进行模拟傅氏变换 ,实现多频数据采集 ,使低速 A/ D也能满足测量要求 ,并能消除随机干扰信号影响 。

In order to increase efficiency and precision of observation, a scheme using multi frequency CSAMT observatin is put forward in this paper, which can radiate and receive several kinds of electromagnetic waves with different frequencies at one time. Analog fourier transform technology is adopted to achieve multi frequency observation in this paper. Multi frequency data acquisition can be come true by means of analog fourier transform on the frequencies to be measured, so the low speed A/D can meet the demand of measurement. Besides, the random interference can be eliminated and the anti jamming abilities of observation systemcan be improved also after this technology being used.