Research And Implementation Of Remote Monitoring System Based On Embedded Web

With the rapid development of computer and communication technology, remote monitoring technology grows up rapidly. By virtue of effective way which is provided by remote monitoring system based on embedded Web server, embedded control network monitoring system has been became one of the focuses of future development direction. In this paper, a remote intelligent monitoring system was designed and implemented which is suitable for unattended computer rooms, storage, laboratories, and other places.The system has the function of the environment monitoring, equipment control, intelligent alarm, video monitoring and so on. It is consisted of monitoring sites, embedded Web server and remote monitoring console. We study the key technologies of embedded Web server for remote monitoring specificly. The main content can be divided into seven parts as follows.Firstly, a monitoring site was designed through the research of the various sensors. Function of the real-time data collected and equipment controled was implemented by AT89S51 on the spot. The data collected include the environmental temperature, humidity, and so on; Equipment control mainly refers to air-conditioning and power of equipment contrl.By using the ARM platform, web server was bulided. The CPU of the hardware platform choose microcontrollers S3C2410, and choose the embedded Linux operating system as software platform, the system of B/S (Browser/server) structure was achieved, and it colletcts various environmental data and video data which can be displayed to remote users through the Web browser. Besides, the user can send the command to control the remote equipments on the Web page. Web server collected and processed the date from the monitoring site, and then it would give a corresponding alarm signal on the monitoring site and remote client, when the data was beyond the user-defined threshold or data anomalies.Monitoring sites and embedded Web server was connected through the RS485 serial port. By the research of the structure of the Linux operating system and the application procedure, a user programme is achieved, which it achive communication between Web server and monitoring site by the RS485 serial.The embedded database SQLite was transplanted into the web server. The principle and method of SQLite database and CGI were introduced. The data access rapidly and the refresh data on the web homepage were achieved.On the base of embeded web server, we designed and realized video monitering by the remote internet. The collecting and transmitting video date from USB camera were realized real-timely, by configure USB camera, and transited Spcaserv into embedded system afrer researched deeply spceserv streaming media server in Linux. Besides, we embeded the Java program to the web homepage, and client real-timely remote video monitoring by IE browser was realized, if installed the JRE platform to client.The spcaserv streaming media server was improved with UDP, and it slove the problem that source of system was occupation largely and the slow speed of transmission during the the actual implementation of system.Finally, the moving target detection technology of the video image was researched, and then system was improved by advance a new moving target detection algorithm. When moving target appeared in the monitoring scope, the system would send alarm sigals to client and store picture into the flash automaticly.The monitoring system has been used to the school network Centre Room; the system can run stably, operate accurately. The result of monitoring is fine.