基于PC机的雷达图像信号采集与显示系统

提出了一种基于PC机的雷达图像信号采集与显示系统的实现方法。整个系统设计包括硬件电路设计、固件设计以及上位机软件编程。采用CPLD作为硬件采集电路的核心元件,控制外围电路采集雷达图像信号到采集卡上的缓冲区中。采集卡使用2片双口RAM构成双缓冲区结构,当1块缓冲区完成1条扫描线数据存储后,数据会通过PCI总线被取走。软件设计则分为驱动程序以及应用程序设计2部分。驱动程序收到CPLD取数据信号后,会将采集到的雷达图像数据从采集卡上的缓冲区复制到应用程序缓冲区中等待处理。最终,应用程序将缓冲区中数据取出,进行各种处理后,将最终的雷达图像在PC机显示器上进行显示。

The system of radar signal acquisition and displaying based on PC

A designing method of radar signal acquisition and displaying system is introduced. The implementation of the whole system includes some aspects below:hardware,firmware and software development. CPLD,as the core unit in the circuit,controlling the whole hardware system to sample radar signal,then save it in buffer on sampling card. It is double buffer structure on sampling card built with two dual-port RAMs,after each filled with one scanning line,received data will be taken through PCI bus. The main job of driver program is to move data from buffer on sampling card to application program buffer,waiting for being processed. Finally,application program acquires all data and displays radar image on PC monitor.