交叉偶极声波测井的数据采集与处理电路设计

摘要

针对多通道声波数据采集时序控制复杂的特点,设计了一种基于DSP和FPGA的声波数据采集与处理电路.设计中在FPGA内部构造4个异步FIFO作为模数转换器和DSP之间的数据缓存器,并由DSP实现LZW数据压缩算法等数据处理,电路协调一致地完成8路信号的采集与处理操作.实践表明,该电路能够稳定可靠地工作,达到了井下声波信号采集的要求.%For the characteristics of multi-channel acoustic data acquisition, which is complex in timing con-trol, the design of an acoustic data acquisition and processing circuit based on DSP and FPGA is presented. In this circuit, four asynchronous FIFO are realized by using FPGA and used as a data BUFFER of ADC and DSP. In addition, DSP is designed to realize data processing such as the algorithm of LZW data compression,eight-channel' s signal acquisition and processing can be finished coordinately through the circuit. The result of much experiment indicates that the circuit can operate stably and reliably, which can satisfy the need of the ac-quisition of down hole acoustic signal.