基于FPGA的车载图像记录仪设计

Design of Vehicle Image Recorder Based on FPGA

提出了一种基于FPGA的车载图像记录仪的设计,其主要功能是记录车辆行驶过程中的图像信息,为车辆事故责任的准确判断提供事实依据。记录仪的工作原理为:以FPGA芯片作为系统核心,控制SAA7113H将CCD传感器采集的模拟视频信号转换成数字信号,由SDRAM实现图像数据的缓存。当存完一帧图像以后,再将SDRAM中的数据转存入Flash中,完成图像的实时采集。最后通过USB将图像数据传输到PC机中进行事故责任分析。

The paper Presented a FPGA-based vehicle image recording instrument design. Its main function is to record image information in the process of traffic so as to provide a strong factual basis for determining the responsibility of the accident correctly. Recorder works for SAATll3H capturing analog video signals from the CCD sensors into digital signals, SDRAM works as a buffer of the image data. After the accomplishment of saving one frame data, FPGA issued control signals to transfer data from SDRAM into Flash. Then the acquisition of the real-time image data is completed. Finally, it transfers the image data into the computer for the accident analysis through USB.