【摘要】 提出了一种车载图像捕捉和记录仪的设计,其主要功能是可以记录交通事故发生前25s和发生后5s车辆前方大视角范围内的现场图像信息,为事故责任的准确判断提供有力的事实依据。系统的设计为:CMOS图像传感器实时采集图像数据,大容量图像信息数据的存储采用SDRAM与NAND Flash双存储器结构来完成,系统核心控制器采用ARM7芯片S3C44BOX.如遇突发交通事故,事故传感器产生触发中断信号,系统响应中断的主要工作是将SDRAM中的图像数据及时转存入Flash中。这些图像信息可下载调出,供事故责任分析。更多还原

【Abstract】 Proposed a design of vehicle-borne image recorder of which the main function is to capture and record the wide-scope image of the accident with time length 25s before and 5-s after.The information extracted from the images can give valid evidence for the responsibility analysis in the case.The system consists of CMOS image sensor for real-time image capture,large-volume image data memory subsystem of SDRAM and NAND Flash.The system control was realized by ARM7 chip S3C44BOX.Accident sensor producesd an interrupt trigger signal while accident is taking place.The interrupt response operation of the system is to transfer the image data from SDRAM into Flash.The image information can be downloaded for accident case analysis.更多还原