Distributed Data Acquisition System Based on CAN Bus

Intelligence and networking is the development trend of the automation instrumentation,data acquisition technology is the basis of the intelligent instruments witch implements controlling,monitoring and many other functions.Utilizing the computer control technology,field bus technology and communication technology,this paper researched the overall scheme of the system wtich based on CAN bus.It desgned hardware of the lower-node data acquisition module,CAN bus communication module and up-node data storage module.After pressure data acquisition test,the experimental result showed the system can meet the request of accurate data acquisition,reliable communication and data storage.As the system has good universality and scalability,it can be used in many fields.