CAN Bus Signal Conversion Interface Design And Application In Microcomputer Monitoring System For Da Zhun Railway

CAN network Controller Area Network (CAN-Controller Area Network) is a fieldbus category, which is an effective support for distributed control or real-time control serial communication network, the bus specification is ISO International Organization for Standardization for Internationalstandard, and is recognized as one of the most promising field bus. Extensively in all sectors, in a large prospective railway signal computer monitoring equipment will be well used.Signal computer monitoring equipment using the latest technology in sensors, computers, network communications, the means of supervision, inspection, storage, and intelligent judgment on the use of state of the station interval signal equipment for real-time monitoring, the monitoring information through the CAN network is sent to the station machine, the officers concerned for query, analysis, statistics, aggregated to provide a scientific basis for the maintenance of equipment,has brought great convenience to many aspects of the large prospective railway signaling equipment maintenance, and management. In use for many years, has also exposed some shortcomings. The communication interruption, such as:inaccurate monitoring, upgrade difficulties.Therefore, we need to develop a new set of computer monitoring system, on the basis of the original function to further enhance the reliability of the system, collecting data accuracy and real-time communication. Large prospective Railway has installed computer surveillance equipment are used CAN bus communication, so the study of the characteristics of the CAN bus in the computer monitoring system is particularly important.This paper is based on the development of railway signal computer monitoring system and expand.Thesis research direction is in the monitoring system, the acquisition machine station between the reliable, high-speed, easy to configure the CAN communication networks, and how to ensure that communications systems in the railway station complex field environments reliable operation.Thesis completed the following aspects:1. Elaborate hardware and software design ideas and key technologies, and gathering machine for computer monitoring system specific projects, namely hardware and software planning and functional design;2. for system reliability design;3. all aspects of the CAN bus transmission performance, including real-time communication, communication capacity, baud rate and load rate, more in-depth research.