CAN bus in the electric vehicle monitoring system of Abstract Now, CAN, high-performance and reliability has been recognized and was widely used in industrial automation, marine, medical equipment, industrial equipment, and so on. Field Bus is the development of automation technology One of the focuses of the area known as automated computer LAN. It is a distributed control system to achieve real-time between the nodes, reliable data communications providing strong technical support. CAN bus belonging to the scene of the areas, it is an effective support for real-time control of distributed control or serial communication network. Compared with many of the current RS-485 based on the R line Construction of the Distributed Control System, based on the CAN bus distributed control system has obvious advantages. In this paper, occupies a lot of relevant information based on the comprehensive use of various methods of the CAN bus in the electric vehicle monitoring system in the application of theory and an analysis of development issues, and some of the problems raised his own views. The full text is divided into four parts: The first part of the main topics on the background and content of the subjects studied in the context of topics to write on the CAN bus status and significance in the research described in the content of the object of measurement requirements and complete the task of this paper. The second part, write data acquisition module design, from the SJA1000 CAN-based communications port design, acquisition, the electric car design; electric car design capacity of the collection node consists of three parts. The third part, mainly to write the electric vehicle monitoring network design, the first Fieldbus awakened comparison and choice, selected after the introduction of the CAN bus, the last of the SJA1000 CAN bus controller is introduced. The fourth part is really on the reliability of the system design for discussion, data from the calibration, the anti-jamming software and hardware design of the anti-jamming design in three areas to address the reliability of the system problems. Key words :Fieldbus; CAN bus; SJA1000; nodes;
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