高动态范围微震信号采集系统设计

Design of microseism signal collection system with high dynamic range

为了提高微震信号的采集范围和信噪比,设计了一种高动态范围微震信号采集系统。该系统根据采集信号的幅度选择放大器增益,将信号调整到适合的A/D采样范围,然后对信号进行数字滤波处理并通过RS422接口传输至上位机。测试结果表明,该系统动态范围可达136dB,能准确采集强弱不同的微震信号。

In order to improve collection range and signal noise ratio,a microseism signal collection system with high dynamic range was designed.The system selects amplifier gain according to magnitude of collected signal,and adjusts the signal to suitable A/D sampling range.The adjusted data is processed through digital filter and transmitted to upper computer by RS422 interface.The test results show that the system can accurately collect microseism signals of different strength with 136 dB dynamic range.