Research On The Establishment Of Multi-vision Sensor Measurement And Control System Based On CAN Bus

With the development of computer technology,automation technology and industrial configuration technology,machine vision inspection technology has become one of the research hotspots in the automation field,and has been widely used in the field of industrial production,medical restoration,reverse engineering,artificial intelligence and flight transportation.For some objects with complex structures and large size,or different objects that are distributed far away,it is difficult for traditional visual sensor control system to obtain comprehensive image signals,which is limited by processing speed,real-time performance,cost and so on,therefore,it's of great significance to establish a comprehensive real-time control system of machine vision.Based on the CAN bus technology and configuration technology,the goal of this paper is using CAN bus to build a multi-vision sensor monitoring and control system network,which is combined with the human-computer interface established by MCGS industrial control configuration software,it can monitor multiple vision sensors in real time to obtain image data accurately,in order to better meet the needs of high automation and integration in modern industry.The main research contents of this paper are as follows:(1)In view of low real-time performance and the difficulty of comprehensive data acquisition of the traditional vision sensor system,and taking into account the high real-time performance and reliability of the CAN bus.Based on the CAN bus distributed control system,this paper puts forward a structural approach to independently designing the CAN bus communication node,with C8051F040 as the core.The working principles and detailed circuit distribution of vision sensor nodes,multi-channel video switching nodes,and power supply modules are expounded.Then the overall design of the multi vision sensor network is carried out according to the master slave structure communication mode.(2)Combined with the hardware characteristics of the system,this paper takes a modular approach to design the function program under the development environment of Keil ?Vision4 in the Keil C51 compiler,it includes the communication between the nodes of the CAN bus network,which is composed of the microcontroller C8051F040,the CAN controller SJA1000 and the CAN transceiver TJA1040,the video signal switching channel of the video switching nodes,USB-CAN interface card data transmission and image acquisition card work are also included.From the detailed requirements of the system,this paper specifically formulates the application layer protocol of CAN,making the system more in line with the design requirements.(3)Basing on the completion of USBCAN-? interface card configuration,combining with ZOPC server and MCGS configuration software,the paper sets up human-computer interaction interface in the host computer and configure related parameters,realizing two-way communication between the host computer and CAN bus network,which to guarantee the real-time monitoring of each network node.After the completion of the multi-sensor measurement and control system,this paper mainly carries on the experiment analysis of CAN bus communication debugging,baud rate configuration debugging and image data switching debugging,and simulates the actual work situation of the system,the experiment result shows that the measurement and control system meets the design requirements.