The Design And Implementation Of The Digital Surveillance System Base On LAN

The rapid development and popularization of network technology have been leading to the connection of more and more systems with more and more quickly speed. And the technological innovation and product innovation following have been bringing out the improve efficiency of the enterprises and the reduced costs. Therefore the security monitoring system was required to fulfill higher requirements. It is hoped that video surveillance, access control, intrusion detection, perimeter protection, fire protection and alarm systems are able to connect with each other like the various components of network, which can improve the protection level greatly, reduce the response time and prevent the occurrence of a disaster or reduce disaster losses effectively. Therefore security industry, which sticks to the traditional for a long time, should adopt IT technology positively and fulfill the linkage of each components and subsystems through the network.Digital Security Monitoring System is an integrated monitoring system including the function of audio and video monitoring, security alarms and so on.Digital monitoring system has been becoming one of the most important mean for modem management, monitoring and control because of its ability of reflecting the characteristics of the object being monitored vividly. The third-generation remote multimedia monitoring system is small and able to offer stable image, long-distance monitoring and so on. It has a good application and development prospects comparing with first and second-generation.This paper builds a video stream server system subject to large-scale transformer substation monitoring application for the background. The main purpose of this system is to monitoring all kinds of devices in the transformer substation. Alarm and record some exceptional emergencies to achieve unmanned monitoring.The core content of the digital monitoring system in this paper is a transmit server and video server design and implementation. The system divideds the various modules with the modular software design ideas. Sent commands by user-defined communication protocols. Some of the commands use TCP / IP protocol, video streaming datas using UDP / multicast protocol to send. The transmit servers operate the DVR with SDK implying by the manufacturers, and capture video datas and other relevant parameters from the DVR to sent to the other system modules. Video servers implement to save and playback videos.