Rail transit is an important part of the urban public transportation system. It plays an important role in alleviating urban traffic pressure, saving energy, and guiding urban planning. Many cities in China have built or planned rail transit systems. However, security issues have always been a serious challenge to the construction and management of rail transit.

The rail transit video surveillance system is an important part of guaranteeing the normal and safe operation of rail transit, which is mainly divided into two major aspects: operation and security. The rail transit operation video surveillance system mainly deploys monitoring points in the vehicle control room, along the track, crossings, etc., and passes disaster prevention and alarm system (FAS), environment and equipment monitoring system (BAS), power monitoring system (PSCADA), and shielded doors ( PSD) or security door (SD) systems, access control systems (ACS), etc., to ensure the normal operation of the rail transit system. The rail transit security video surveillance mainly includes monitoring and control points at railway stations, entrances and exits, ticket offices, banks, elevators, platforms, and other locations, as well as rail vehicles. In combination with access control and alarm systems, it records and controls the logistics and flow of people at various sites. Actively respond to possible emergencies.

Due to different content and management systems, the operation monitoring system and the security monitoring system have been separately constructed and operated independently. On the one hand, this construction mode has increased the construction cost to some extent, and on the other It is also more complex and wastes manpower and financial resources. With the development of video surveillance technology, the rail transit monitoring system has shown a more and more obvious trend from independent operation to integrated security management. Integrating operation monitoring and public security monitoring can achieve resource sharing and reduce duplicate investment. Simplify management processes and improve management efficiency.

In general, the construction of the rail transit video surveillance system in the new era has the following characteristics:

1. Networking

Since networked video surveillance has obvious advantages in deployment, management, and application compared with traditional surveillance, it has been adopted by many industries in recent years as the network matures and costs have fallen. Rail traffic monitoring is also facing This networking requirement. By constructing a networked video surveillance system, the state of individual monitoring and management of each line can be broken down, and the unified and efficient operation and management of multiple lines, multiple stations and multiple links in a unified control center can be fully realized.

2, intelligent

Rail transit has a large number of people, long monitoring lines, a wide range of operations, and busy operations. It is difficult to detect abnormal or threat events in a timely and effective manner by relying solely on human monitoring. This has led to a large number of video surveillances that have played back for evidence only through video storage. Intelligent analysis technology can locate, identify and track targets in dynamic scenes through real-time analysis of surveillance video images, and analyze and judge the behavior of targets so that they can respond in time when an abnormal situation occurs, enabling early detection. And active prevention to help security personnel effectively avoid or effectively deal with threatening or sudden events.

3, high-definition

Because of the popularity of network monitoring, the trend of high-definition video surveillance is very obvious. Currently, there are mainly three types of high-definition video formats: 720P, 1080 I, and 1080P. Compared with the traditional D1 and CIF formats, high-definition video can provide significantly improved video clarity and video fluency. Take 1080P, the highest level at present, as an example, the resolution is 1920×1080, the image resolution is 20 times that of CIF video, 5 times that of D1 video, and the 1080P frame rate can reach 60 frames/second or 60 fields/second. Its fluency is more than 2 times that of D1 and CIF. For rail transit, adopting high-definition monitoring can achieve more accurate and more efficient video applications. It can not only achieve real-time HD monitoring and video storage, but also meet the needs of intelligent monitoring. The clearer the image, the higher the accuracy and efficiency of intelligent analysis.

4, security integration, integrated management

In addition to the video surveillance system, the rail transit integrated security system also includes access control systems, emergency warning systems, electronic fence systems, and power monitoring systems, and environmental and equipment monitoring systems. To improve management efficiency and maximize the role of early warning and defense, it is necessary to deeply integrate and integrate these mutually independent systems, adopt unified management methods, and realize linkage between each other.

Keda Rail Transit Video Surveillance System is based on a fully networked architecture, enabling remote monitoring, remote scheduling, and integration with a variety of established networked or non-networked video surveillance systems, while seamlessly connecting to the rail transit system A variety of other security systems enable full integration and comprehensive management of operational and security monitoring resources.

The system uses a two-tier architecture to establish a level monitoring center, deploying monitoring platforms, storage devices, video walls, and controlling clients, and centralizing monitoring and management scheduling for multiple stations and multiple lines. A secondary monitoring center is set up in each station control room to take charge of the unified access and management of all monitoring resources at the station. The decentralized management framework is well adapted to the division of administrative functions in rail transit management and improves management efficiency. At the same time, the system can also interact with 110, 119 government emergency systems to improve the response capacity of the rail transit system to handle emergency affairs.

(1) The system adopts a fully networked architecture. Through the application of networked video surveillance technology, it is easy to perform centralized management and remote call. Front-end video and audio signals, alarm signals, etc., can be remotely viewed, recalled, and centrally managed by the station sub-control room and the general monitoring center through the network. At the same time, the rail traffic monitoring can also be connected to the public security monitoring system to receive unified monitoring by the public security. The networked architecture also provides the basic conditions for integration with other monitoring resources.

(2) The front-end monitoring point deployment can adopt two deployment modes: deploying a network camera directly or an analog camera plus an encoder, monitoring and recording the ticketing offices, entrances, exits, escalators, platforms, and banks of each station to facilitate the timely detection of suspicious persons. And threat events. A monitoring point is set every few hundred meters along the rail transit to monitor and record the road surface conditions and vehicle operating conditions in real time, preventing foreign objects from intruding into the circuit, and grasping the position of the vehicle to ensure the safe operation of the vehicle.

(3) Use a wireless encoder for in-vehicle monitoring. Based on the 3G wireless network, on the one hand, the monitoring center can control the running trajectory and real-time location of subways, light rails, etc. in real time through the electronic map; on the other hand, if there are robbery, theft, fight, wounding and other illegal activities in the carriage, the conductor can use the video. The monitoring system will promptly report on the situation of the police. At the same time, the monitoring center and the public security department can also make timely and timely discovery. The fastest time will be to take measures to handle the police situation.

(4) Intelligent monitoring can actively analyze the events such as people entering the rail transit area, legacy rail transit areas, station crowd abnormalities (congestion, fights, etc.), criminal suspects' monitoring, and other events in accordance with preset rules, and upload the analysis results. To the monitoring platform, a large amount of invalid information can be filtered to quickly detect the situation of the police, and play the role of predicting the warning in advance, changing the passive defense into active defense.

(5) Through secondary development, the parameters and alarm information of other monitoring systems (FAS, BAS, SCADA, etc.) in the rail transit integrated monitoring system can seamlessly access the Kodak Integrated Management Platform to achieve unified management of multiple resources and The video surveillance system forms a linkage, so as to ensure that there is an alarm, the video surveillance automatically switches to where the video is, so that the monitoring center is fully aware of the operational status of the rail transit.

(6) Various analog, digital, or networked monitoring systems that have been previously built for rail transit can be seamlessly accessed to the Keda monitoring and management platform through corresponding media gateways for unified management and application, avoiding waste of resources and secondary investment.

(7) Through the visualized security model, integrated management and linkage mechanism, the ability of remote control and dispatching of the rail transit department can be greatly improved, and the efficiency of handling and monitoring the police can be improved.

Conclusion

Through security integration and comprehensive management, sharing and linkage of monitoring resources are realized. In conjunction with the application of high-definition, intelligent, wireless and other advanced monitoring technologies, rail transit security will surely continue to be highly efficient and perfect.