The Study About The Automobile Instrument Based On Bus

Automobile instrument is the vital part of the automobile, which is the interface between human and automobile, providing the information such as running parameters, failures and mileage etc.Since 1990s, ECUs have been introducing into the automobile industry. A great deal of information needs to be shared between the deferent ECUs during the running of the automobile; a great deal of control signal needs to be exchanged in real time in the control system. As the critical parts for the transformation and display of the information, automobile instrument network is the development trend of the automobile industry.CAN (Controller Area Network) bus has many features such as high-speed communication, good real-time, strong anti-electromagnetic disturbance, easy connection and high cost performance. It is acknowledged that CAN bus is one of the most promising bus because of its prominent technological features, economic and reliable hardware support and good software protocols. It is not only suitable for the communication between the ECUs in the automobile, but also welcomed in other industries. Currently, CAN is almost the absolutely necessary method in the automobile industry.Topological structure is applied in the CAN network. In the CAN network, sensors, controllers and actuators are connected through CAN bus, it is efficient that all the nodes use the same path, only one node is the main site and can be sent in the mean time,CAN is a multi-host serial communication bus, it can detect any default, and it has high speed and strong anti-electromagnetic disturbance. It also has priority and...