摘要
针对目前普通行车记录仪在使用过程中会出现视频存储空间有限,电池续航时间短,致使监控系统不能长期持续工作等问题,设计了一套基于S3C2440A处理器的嵌入式视频监控系统。该系统使用热释电模块对周围的移动物体进行感应,利用嵌入式处理器将热释电模块传入的感应信号进行分析处理,通过V4L2视频采集接口控制USB摄像头进行拍摄并保存到USB存储设备中,节省了电池电量并可灵活扩展存储空间。测试结果表明,系统能对4 m范围内的移动物体进行准确的预警拍摄,同时,由于摄像头在未获得热释电探测系统传入信号时处于关闭状态,减少了摄像头的工作时间,使监控系统能够长时间处于工作状态。
Monitoring system cannot work for a long time because of limited video storage space and short battery life ordinary tachograph. A processor S3C2440A-based embedded car video surveillance system is designed to solve these problems. In this system, a pyroelectric sensor module is used to analyze and process the signals which are produced by moving object approaching the car. V4L2 video capture interface is used to control USB camera to take video and save it in a USB storage device. The test results indicate that the system is able to get accurate early warning shot of moving objects in 4m scope. Meanwhile,the camera is turned off before the pyroelectric module gets the signals, so that the camera working hour is reduced and the battery power is saved, making monitoring systems work for a long time.
出处
《北京信息科技大学学报（自然科学版）》
2014年第1期82-84,共3页
Journal of Beijing Information Science and Technology University
基金
研究生科技创新计划和大学生科技创新计划(国家级)资助
