基于PXI总线的水声目标回波模拟模块的设计

The Design of Underwater Target Echo Simulation Card based on PXI bus

目前声呐等水声设备广泛使用宽带发射信号,为了模拟水声目标的回波,研究了一种高精度的宽带目标回波实时模拟技术。该模块采用PXI总线,PXI总线计算机可以使用总线直接对硬件进行控制,传输速度高。模块可实时完成对水声目标回波延迟、脉冲伸缩、包络调制的精确模拟。分析了该模块的硬件结构,编写了该模块的WDM驱动程序、应用程序以及与LabView软件的接口程序。该模块对某型宽带多普勒声呐的海底回波进行模拟,模块能满足宽带回波模拟的要求。

The broad-band transmitting signal is used widely in Sonar. To simulate the echo of the underwater target, a high precision underwater target broad-band echo technique is proposed. The card use PXI bus, and the signal processing hardware is operated under the control of a PXI computer, the card can simulate the delay, pulse broadening, envelop with high precision. The hardware structure is analyzed, and the WDM driver, the application and the interface with Labview is programmed. The Certain broad-band Doppler sonar is tested using the simulating echo.