| Along with the development of technology, automatic welding technology matures. Developed countries of the microcomputer control electronics welder has entered into practical phase, and toward multi-function, many parameters controlling, control and intelligent control of wave direction. While the automatic welding equipment, especially the control system of automatic welding is just the start stage, cannot satisfy the needs of the construction of national production.Aiming at this kind of situation, a welding equipment technology Co., LTD to developed automatic welding system of the new control platform for welding. To accelerate the transformation of traditional technology, the reliable, practical and economical automatic welding control system has the important practical significance. This topic is derived from the project.The new control platform, mainly by computer, Intermediate machine (monitoring system) and the test control system (DSP). The computer is mainly responsible for remote monitoring the station of the welding equipment, and the Intermediate machine is mainly responsible for the whole process of welding, communication and man-machine interface, the test control system responsible for the specific parameters for the acquisition and control. Among them, the emphasis of the study is the monitoring system. It includes man-machine interface (keyboard, LCD display), debugging interface (JTAG,RS232 interface), and the communication (the CAN bus) and computer communications (the Ethernet interface).This paper summarized the domestic automatic welding machine. It established the basic framework of the welding system by the analysis of automatic welding machine platform system.Secondly, designed and researched the embedded hardware circuit system use the core like S3C2440.its included IIC bus circuit and RS232 interface circuit and Ethernet controller based on SPI circuit and the CAN bus circuit. The circuit of the monitoring system adopted advanced JTAG debug mode, and with RS232 interface for auxiliary debugging channel, it make maintenance convenient. And the CAN bus also use in the monitoring system. The CAN bus designed base on the SPI of S3C2440, and then the good anti-jamming measured in the can bus.This program should satisfy the requirement of real-time and expansibility. The paper choose the operating system with real-time like Linux, which have been cut and transplanted into the S3C2440. The paper studied the driver for Linux combined with the hardware circuit. In this case, it also presented the details of process of the development, and obtained good results of controllability and maintainability in the real-time monitoring system. The man-machine interface study the cooperation application about chromatic LCD of 640X480 dot and S3C2440, and the paper configures the LCD controller of built-in S3C2440, and illustrates the practicability of the man-machine by the example of the startup display. In the part of communication with the computer studied hardware circuit and software configuration of Ethernet which based on TCP/IP protocol, and made it much easier to remote monitoring and networking.Studying the thesis, these experiments were made like anti-interference on the CAN bus; operation and display for human-machine interface; cut and transplanted for Linux system. The results show that hardware and software of monitoring system is reliable, and it is convenient about loading and unloading of functional modules. It meets the requirements about anti-interference of signal transmission, and reaches the application level of real time. |
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