The Control Realization Of Embedded Numerical Control System Based On WEB

With the development of technology, such as computer, communication, microelectronics etc., people put forward high request more and more to intelligence of numerical manufacture. We will hope to monitor and control the working state of the system equipment long-rang in real time. It put forward higher request in respects, such as opening, interconnection, dispersiveness etc. to the network of controlling.Embedded technology has a lot of advantage as the technological platform of numerical control. People have already begun to use embedded technology for the numerical control system at present. It is the embedded technology that can meet numerical control technology's demands at first, the present embedded systems are all improved greatly no matter in operation tempo, precision, systematic function and software development, running environment. Secondly, it can realize the optimum performance-cost ratio to adopt embedded technology. And then thirdly it is the developing direction that the embedded technology especially accords with numerical control with networked technology. In addition, embedded technology can be developed independently through the hard , software, the cutting of operating system and system module, form it finally and totally have a independent intellectual property right on the basis of the embedded numerical control system. So, the embedded numerical control system controlled on the basis of the network will become developing direction of the numerical control system in the future gradually.This paper has described the design of the embedded numerical control system controlled and monitored on the basis of Web and realized the course, can offer the solution which uses experience and relevant respect for reference for design and realization of the advanced numerical control system even more, And the concrete implementation technique and implementation method are provided. Embedded operating systemμC/OS-II is selected as the operating system of this subject finally for its simplified kernel, small necessary memory, good real-time character and high reliability.μC/OS-II is transplant to developing board of ARM7 based on SAMSUNG Company S3C44B0X microprocessor. The API function and hardware driver ofμC/OS- II have been written. On the basis ofμC/OS- II operating system, light-weight embedded TCP/IP protocol inn lwIP was selected for use. The transplantation of lwIP and RTI8019as net card driver is written. AfterμC/OS-II+lwIP platform is built up, embedded WEB server is designed. CGI technology is used to realize the dynamic webpage, which can make the form on the webpage communicated with WEB server, thus control the operation of the lathe. Meanwhile, AJAX method is adopted to obtain real-time data through asynchronous WEB communication on the webpage. The client is no need to install any ActiveX control, and raise the transfer rate of the real-time data. Summarize this thesis finally, question and deficiency existing at present are analyzed systematically, and has proposed imagining the content and direction of next research work.