I. Background analysis
Video surveillance system is an important means to ensure the organization and safety of urban rail transit. Dispatcher and station watchman use it to monitor train operation, passenger flow situation, substation equipment room equipment operation situation, improve driving command transparency. Police use it to ensure the safety and order of passengers. When the station has a disaster, the video surveillance system can be used as a command tool for disaster prevention dispatcher.
With the improvement of video requirements, rail transit industry has generally begun to build high-definition video surveillance. The hd video surveillance solution for rail transit was introduced, which mainly optimized the reliability, stability, openness, scalability and emergency plans of the video surveillance system.
Ii. Project requirements
Hd: Can provide the overall HD solution, including a full set of HD equipment. Support riot control, ultra-wide dynamic, electric zoom gun, hemisphere, ball machine and other cameras, as well as 4K ultra high definition fisheye and thermal imaging and other featured products recommended.
Support multicast, multicast: system can be addressed by multicast video distribution problem in great quantities, so as to solve the streaming media server at the time of transmission to the client network bandwidth larger problem, and streaming media solutions based on a server replication distribution, make whole streaming media server solution global point of failure problem, also increases the adaptability of the system for breaking large flow.
Video direct storage: the IPSAN storage device supports video direct storage. Videos can be directly stored from the front-end camera to the storage device. Avoid the impact of server downtime on video recording and improve system reliability. It also supports ONVIF and GB28181, and can be connected to third-party front-end devices, increasing the openness of the system.
Intelligent: it can realize a series of intelligent functions such as video intelligent behavior analysis, video quality intelligent diagnosis, intelligent face recognition, and integrate seamlessly with the platform.
Operations: using intelligent analysis, fault detection and workflow engine technology, integration of the recorded video quality diagnosis, inspection and equipment state inspection, and other functions, through fault under alarm, circulation processing, statistical reports, and other business functions, reduce the labor cost of video monitoring system operations, improve the level of operation maintenance, ensure safe and reliable operation of the system.
Iii. Plan deployment
The public security video surveillance system has a three-level architecture, including subway public security sub-bureau, subway police station and subway station. The whole network consists of image uptake, image coding and decoding, image display and storage, station control and processing, central control and processing, video signal transmission network, network management and so on. Station video server EasyGBS completes local monitoring of the processing of authentication, control, configuration, registration, image selection, priority control and other signaling information, when the server failure or network interruption, does not affect the ongoing video stream storage and monitoring.
4. Advantages of the scheme
The system adopts a distributed architecture. The CCTV systems of each station and control center respectively operate as an autonomous and independent system. The CCTV systems of each station and control center cooperate to form a unified system.
High-definition video signals from the cameras at each station are transmitted to the station switches and storage devices through optical fibers, and then transmitted to the video processing equipment in the control center.
A set of IP SAN storage devices with capacity expansion is set in the equipment room of each station to store video in the station. When a storage device fails, the video information can be automatically switched to the storage device in the control center for storage, so that the video information will not be lost.
When the local video server is faulty, the video server in the control center can perform corresponding functions to realize remote backup of the video server.
In order to facilitate operation and maintenance, a network management system is set up for CCTV monitoring system, which can carry out comprehensive management such as parameter setting, programming, fault alarm and unified topology management for CCTV monitoring system equipment.
