The Design And Application Of CAN-Bus On Vehicle Body Control

As the development of the modern automobile technology, the amount of the electronic facilities is increasing fast. So there are more and more signals need to be handled., and the traditional point to point connection can not satisfy this request. As the representative of the bus used in automobiles, the CAN-bus comes into existence..This paper introduces the development and the state of the automobile electronics technology in the worldwide, and makes some comparision among the main automobile buses. The body control system of homemade automobile is mostly composed of parts that operate unattached, which is not extendable and less intelligent. To improve the performance of homemade automobile , the paper brings forward a scheme that the central module and four door modules connected with CAN-bus (dual wire,<125 kbps)constitute a distributed-control system based on high level protocol. This system realizes the function about remote control, antitheft, door window lift, inner lamp, exterior lamp, rain wiper and defrost of rear window and rearview mirror;it integrates the body control functions and realizes them by network. Test proves that the body control moudle reachs the design object.This paper presents detailedly the hardware and software of the control system considering the existing technology and the consumption level in the future of domestic automobile. The hardware and software of the control system are illuminated in the paper at lenth. This paper has the use for referrence for our country automobile company to independently develop the automobile CAN-bus and automobile body control system.