毕业设计--基于CAN总线的汽车电器网络设计（含外文翻译）_精品.doc

毕业设计基于CAN总线汽车电器网络摘 要随着社会的发展，汽车逐渐成为人们生活中不可缺少的交通工具电子装置在汽车上的使用使汽车的驾驶更加舒适安全传统的线束已远远不能满足复杂的控制系统要求。汽车CAN总线技术的引入给汽车电子控制技术带来了新的飞跃。CAN总线技术不仅满足了车身控制的功能要求，而且可以降低成本、简化车身冗余线束。本文基于CAN总线的汽车电器网络采用了ATmega128作为控制器，PCA82C250以及高速光耦6N137，通过ATmega128控制PeliCAN 模式下的SJA1000实现ECU单元之间的通信CAN2.0B通信协议车用CAN协议（SAEJ1939）关键词：CAN总线； 控制网络；电子控制单元； 数据采集；数据传输 ABSTRACT With the development of society, automobiles play a very important role in people’s daily lifelectronic devices equipped in the vehicle make the driving more comfortable and safe. With the electronic device in vehicle increasing continuously, the traditional wiring harnesses can not satisfy the complex functions of the control system. As the CAN bus introduced into vehicle control system, great progress has taken in the areas of vehicle electron. By adopting CAN bus, the function of vehicle body control system is satisfied perfectly, the cost is decreased, and the redundant wiring harnesses are cut down. A vehicle electrical network design based on CAN bus is brought forward in this paper to achieve the data transmission of the electric control units (ECU). In this design, the main controller uses ATmega128. The hardware circuit of CAN bus communication module adopts CAN bus control chip SJA1000, bus driver PCA82C250 and high-speed optical coupler 6N137. ATmega128 completes the data transmission of ECU through controlling SJA1000 which works on the PeliCAN mode. Following，the software designs are discussed, and the CAN communication protocol of application layer which matches the vehicle body control system is constructed based on CAN2.0 protocol and SAEJ1939 protocol. Furthermore, some anti-interference measurements are put forward to ensure the stability and reliability of the system. The experiments confirm the overall system communication is reliable, and the signal transmission inside the CAN bus achieves the requirements of real-time and stability. Key words： CAN-BUS; Control Network; Electric Control Unit; Data acquisition; Da