基于TMS320C32的多路声信号实时采集与处理系统

摘要

A real time signal acquisition and processing system for localizing and tracking helicoper with passive acoustic is introduced.The system consists of two subsystems being in double CPU parallel architecture.The data acquisition subsystem based on AT89C51 acquires multichannel acoustic signal synchronistically and stores digital signals in the shared memory.The acoustic signal processing subsystem based on TMS 320 C32 DSP fetches data from the shared memory and process them at a high speed,getting localizing and tracking results.The data acquisition and signal processing are made by different microprocessors synchronistically,which is different from the existing serial working mode,thus the response and performance of the system being improved significantly.%介绍了反武装直升机被动声定位跟踪系统中直升机噪声信号实时采集与处理系统的设计。该系统由双CPU并行式结构的两个子系统构成。基于单片机AT89C51的数据采集子系统完成对多路声信号的同步采集，并把数字信号保存到片外共享存储器中。基于TMS320C32 DSP的声信号处理子系统从共享存储器中取出采集数据进行高速处理，得到定位跟踪结果。由于数据采集与信号处理分别由不同的微处理器完成，可以同时进行，不同于以往的采集一段数据，处理一段数据的串行工作模式，提高了系统的响应速度与整体性能。