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The Design of Communication Network of the Measurement System Based on CAN Bus

Author: TianShuaiShuai
Tutor: RenYongFeng
School: University of North
Course: Measuring Technology and Instruments
Keywords: CAN bus Redundancy Switch Repeaters Monitor
CLC: TP273
Type: Master's thesis
Year: 2011
Downloads: 67
Quote: 1
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Abstract


As the most promising one of the fieldbus , the main features of the CAN bus communication real-time , high reliability , and outstanding value for money . CAN bus is becoming one of the hot spots of the development of the field of automation , the range of applications from automotive bus has been gradually extended to many industrial control field field . This paper studies the object measurement system based on CAN bus communication network. According to the mission requirements of the measurement system , the communication network by the main function of the nodes and the number of sensor nodes , the network must have high real-time and high reliability , and therefore all communication nodes in the network the bus hardware redundancy design , at the same time the most critical role of the master node also redundant design . On the basis of the CAN2.0B developed an application layer protocol for the communication network , mainly including the frame ID format making , real-time communication mechanisms as well as redundant auto-switching mechanism . All nodes in the network to communicate , to comply with this agreement can achieve real-time communication and data bus or failure of the master node mainline automatic redundancy switching function . Own characteristics due to the CAN bus communication distance is limited , the number of nodes can connected to the 110 . CAN bus communication distance in order to expand , increase the number of network nodes to achieve a high and low speed network data exchange , CAN bus network repeater , which greatly improves the scalability of the network . Data of the CAN bus network can be viewed on a PC , the CAN network monitor , real-time monitoring of the CAN bus network . Together they form a fully functional CAN bus communication network , and can be directly applied to the industrial field . After the completion of the entire system design , communication system test . The test results show that : the measurement system based on CAN bus communications network running good , stable performance , to achieve the desired design requirements .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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