文档介绍：基于CAN总线的行车记录仪研究ii THE RESEARCH OF VEHICLE DATA RECORDER BASED ON CAN BUS SYSTEM ABSTRACT Vehicle data recorder which also named "black box", is a kind of electronic device which can record parameters such as speed, time, mileage to the vehicle and so on, all of these information can be saved in a safety space and can be outputted by special port. For every time in detail, the multi-function vehicle driving recorder records start time, mileage, driving time, the highest speed and the time the vehicle keeps on. It gives a voice to alarm when the driver exceeds the limited speed; information of vehicle which would be troubled in an accident will be saved before the accident, and could be moved away by USB storage for analysis. The advanced recorder has the capability to deliver information by GSM or GPRS in long-range, and GPS (Global Position System) also be used. According to the vehicle information, the apartment of traffic management makes a much more convenient way to carry on a valid management to the vehicle, so this can significantly lower the occurrence of accident. CAN is a kind of serial multi-munication agreement with high baud rate and high anti-ism interference, and can set out rarely each mistake. For its outstanding performance, CAN has already been applied in numerous realms extensively, such as vehicle, the industry automation, aerospace, medical instrument, construction and environment control etc. This text analyzed the characteristics of CAN bus system, studied a current situation of the data delivering and saving technique. The author’s mainly work as follows: 1. Analyzed the characteristics of the CAN bus system, make sure that the most important part of the data delivering is the CAN bus node, then carry on CAN node controller a design from the software and hardware, first we should confirm the classification of bus physical layer and different delivering mode; Secondly, software design include the CAN bus agreement 河北工业大学硕士学位论文iii application