The formation and occurring of violent earthquake is a process of energy gathering and emission. During this process,it emits strong precursor. A sensor signal acquisition model of comprehensive monitoring system of microscopic precursors is proposed. It is com-posed of multi-signal acquisition,data reading,data packaging&sending,transfer management and generation model of clock and enable signal. The circuit of signal acquisition includes acceleration acquisition,temperature acquisition,geo-sound acquisition and electromag-netic radiation acquisition. There are four parts in the acquisition of geo-sound and electromagnetic radiation,and they are interface cir-cuit,filters,write memories and memories. The function of sensor signal acquisition model is implemented on FPGA which is faster and e-nough to handle large amounts of multi-channel sensor signal data. The adaptability and the high stability enable the system to maintain long-term normal working in the ground and other more hostile environment. In addition,it is easier to debug and update software which simplifies the development process and shortens the development cycle.%大地震的孕育和发生,是地下能量聚集然后突然释放的过程,必然伴随着明显的征兆. 文中介绍了一种用于大地震临震预测的微观前兆综合检测系统中的传感信号采集模块,该模块包括多路传感信号的采集、数据读取、数据打包及发送和传输管理,以及传感器采集电路的时钟和使能信号产生模块. 其中传感信号采集包括加速度采集、温度采集、地声采集和电磁传感器采集,地声采集和电磁传感器采集电路包括接口电路、滤波器组、数据写入组和存储器组. 该模块在FP-Ga上实现,执行速度相对较快,足以处理多路、大批量的传感信号数据,并且适应性较强,稳定性高,在地下等较为恶劣的环境中能够长期保持正常工作,该模块还易于调试和升级,简化了开发流程,缩短了开发周期.
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