基于CAN总线的汽车黑匣子的设计与实现

Design and Implementation of Vehicle Black Box Based on CAN Bus

在交通行业高速发展的今天,交通事故处理中的事故原因分析和责任明晰等事务越来越需要科技手段的支持;汽车黑匣子是可以实时采集并记录汽车行驶状态的电子仪器,提出了汽车黑匣子的总体设计方案,表采用三星ARM920T内核处理器S3C2410为核心,包括CAN总线模块、脉冲计数模块、A/D转换模块、GPIO接口、音频输出接口、RS232接口和USB接口等模块;实时接收汽车的行车速度、转速、灯光、车门、胎压、刹车、驻车及安全带等信息,进行处理和存储;并在实验的基础上,证明了所设计的硬件电路可以准确、可靠的工作。

This paper discusses the composition and function of an advanced controller system of Car Black Box. The system can not only record the main driving data of the car comprehensively and accurately in real-time, but also reconstruct the accident with a data process software, which can help people analyze the accident rapidly and legitimately after a collision. A review of recent researches on Car Black Box is first presented in this paper. The author then analyzes the main problems and development direction of Car Black Box and put forward the neccessity of developing Car Black Box with high performance. Also proposing an integrated design solution for Car Black Box. The design selects the Samsung＇ s S3C2410, which includes CAN controller, pulse counter module, A/D convert module and GPIO interface, audio catput interface, RS232 interface and USB port. The Car Black Box can reciece real-time data including driving speed, rev, light, ear door, tyre pressure, brake, lay-up and life belt, and also process the data and store it in RAM. Based on the experiment, it is proved that the de signed hardware circuit can work accurately and reliably.