Research On Embedded Web Server Based Remote Mornitoring System Of Heat Treatment

The heat treatment is the important step in Austempered Ductile Iron (ADI) manufacture, the change in parameters such as temperature, time, etc, in the process of heat treatment, has direct influence on products' performance index. The traditional control systems of heat treatment are mostly like some isolated islands, and there is no communication with the external world.The target of this paper is to design a remote monitoring system of the heat treatment. After analyzing the process of ADI heat treatment, this paper proposes the system requirement of the remote monitoring system according to the process of ADI heat treatment. Proposes two different solutions of the remote monitoring system and makes comparation of them. The selected solution divides the whole system into 3 parts, which are: temperature control subsystem, PLC control subsystem and embedded Web server subsystem.The research of embedded Web server subsystem is the main content of this paper. ARM7TDMI based S3C44B0X is employed to be central processing unit and the peripheral hardware is compose of Flash, SDRAM, serial communication interface and Ethernet interface. Flash is used to preserve Bootloader, uClinux kernel and file system;SDRAM is used to be operating space and data memory;serial communication port is used to communicate with PLC;Ethernet interface is used to be Internet interface.Software adopts U-Boot as systematic Bootloader. This paper describes the process of transplant U-Boot to embedded Web server after analyzing the structure of Bootloader. Analyzes the characteristic of uClinux and introduces how to transplant it to the system. Besides, a network based cross compile environment is researched.This dissertation researches on the construction of Web server with Boa and CGI on uClinux, and on the method of multi-user authentication by modifying the source code of Boa.As regards the realization of the remote monitoring system, this paper researches the active relation between HTML pages, CGI program and serial communication application. At the end of this paper, the realization of CGI and serial communication application is analyzed.