基于PXI的水声信号采集和回放模块设计

介绍了采用PCI专用芯片和CPLD实现PXI接口功能的水声信号采集和回放模块设计方法。该模块包括接口部分和功能电路部分，能够完成1路采集和4路回放。其中PXI总线负责各种芯片的初始化和控制，并通过测试系统反馈的数据监测整个测试过程。CPLD完成DDS等器件的时序和PCI接口芯片控制等。该模块不仅可用于多普勒速度声纳的测试，同时也可以作为通用的波形采集和回放模块，用于声纳系统陆上仿真平台等。

Design of Acoustic Signals Acquisition and Return Module Based on PXI

To design module of acoustic signals acquisition and return, a method to implement PXI interface based on PCI chip and CPLD was described. The module includes interface part and function part. It can accomplish i channel data acquisition and 4 channels return. Initialization and control of chips, watching the whole test process with system data is charged by PXI bus. CPLD implements control of the timing of DDS and PCI interface chip, and so on. As a universal module of data acquisition and return, the module not only can be applied to Doppler sonar testing, but also applied to simulation platform of sonar system.