Everyone knows that the subway is expensive, but this does not affect the "Great Leap Forward" development of the subway in China. Now, no subway is embarrassed to say that it is a modern city. In 2012, 29 cities across the country will develop 2710 kilometers of rail transit for the next 6-8 years. The total investment is nearly 1 trillion yuan. At the same time, the subway projects are being launched all over the place. Subway failures and accidents have sounded the alarm for the fast-growing Chinese subway. In this regard, the improvement of the relevant security system has gradually been put on the agenda, and the transition from analog to IP high-definition has also been slowly opened. Frequent tragedy in the dark space The real subway derailed I have never seen it, but the derailment of the subway in the movie is just as common as a rollover, and it creates a bleak and visibly visual sense, although "the destruction of several cars is close to the magnitude 8 earthquake and rushes out of the ground." The scene of the smoke and dust close to the collapse of the World Trade Center is exaggerated, but it is also inseparable. It can be seen that in addition to terrorists, Hollywood also likes to go to the subway to do something and then use it to scare the audience. Closed underground space and large-scale crowds have also attracted a large number of terrorists to step on the spot, sarin gas, bomb attacks, artificial arson, "low returns, high output", making terrorist organizations around the world use the subway as a The first choice for terrorist attacks. In the London, Madrid, Moscow and other places, the subway explosion occurred many times, causing a large loss of personnel and property. As a modern urban transportation vehicle, the subway has a history of more than 100 years. It has the characteristics of fast running speed, multiple trains, large passenger transportation, convenient and comfortable. However, the subway is operated in a small enclosed underground space, narrow access and extremely dense flow of people, which leads to safety accidents: subway collapse, subway derailment, signal failure, tunnel leakage, escalator retrograde...any accident "In the dark and closed environment of the subway, it will be promoted to "disaster", so the subway security should be upgraded to a strategic perspective. Special needs analysis of subway Metro video image system is different from other industry security systems, requires higher reliability and stability, and needs to think in many aspects. · Information sharing: Metro video surveillance systems have always had operational and security requirements. Due to different content, management requirements are different. In the past, it was common to establish two independent systems that did not interfere with each other and were managed independently. At the same time, the operation and public security have to do multi-sector supervision and information sharing. When major accidents occur, the public security departments and other departments can conduct coordinated command for the first time. ·Anti-vibration, anti-magnetic and dust-proof: The environmental requirements of the subway for monitoring equipment are much higher than other industries. Because the operation of the vehicle causes the monitoring camera in the station to vibrate very seriously, the camera is required to have strong anti-vibration capability. And because of the strong electromagnetic field of the subway, the requirements for monitoring equipment are extremely demanding. Also pay attention to dust, because the dust during train operation will affect the normal operation of the equipment. · Redundant design: including platform redundancy design, network redundancy design, redundant design of storage system, etc., to ensure that the system can play its due role under any circumstances. · Reliability: The subway line is long, there are many stations, and there are many security subsystems. It requires high integration, and has high requirements for the reliability of the bearer network and equipment. · Capacity expansion: Due to the extension of the extension line and the adjustment of the line in the subway metropolitan area, it is necessary to make the security products easy to expand, which is conducive to more convenient deployment. Integrated platform is the top priority Due to the special nature of subway operation, the construction of security system at present is divided into two major systems in most subways: access control and alarm are comprehensive monitoring, video surveillance is a communication system, and both are based on network to achieve functional integration and unified management. It is required that the security system must also provide the corresponding network solution. After the digital video surveillance system is digitized and networked, the performance of the video management platform determines the operational capability and implementation effect of the entire system for the entire system. Therefore, a fully functional, stable and reliable management platform is essential for the entire system. The current lines have their own independent control centers, and each line operates separately and separately. With the development of urban rail transit, rail transit will form a complete transportation network, and a unified dispatching and control center is needed to coordinate the operation and overall management of the entire rail transit network. For the subway video surveillance system, a unified network video management platform is also needed, which can realize unified management of the video surveillance system of each line. Since each line is separately monitored, there is a problem that the brand of the monitoring equipment used is not uniform, the codec format is not uniform, and the platform is incompatible. This also needs to establish a video that can support multiple encoding formats, has an open interface, and has good compatibility. Management platform. At the same time, in the subway video network management, all the CCTV system equipments are managed by the monitoring center in a unified manner. The unified configuration of the network management terminals is a very effective maintenance method, which can intuitively manage all the CCTV equipment through the subway CCTV system management server. Perform remote configuration to monitor the operating status of the equipment, including the operating temperature, current, voltage, circuit continuity, channel occupancy, and alarm information. The so-called big security integrated system refers to a set of platforms as the core, and manages video, access control, alarm and other subsystems through a unified large platform software. It can grasp the information of each system and interconnect in the first time. . In the past subway field, the security systems were single and independent, and each system shared hardware only through an open interface, which could not effectively exert the advantages of integration. In this regard, Tyco integrated security Proximex co-founder and chief technology officer KenPrayoonCheng expressed his concern: "Because video and alarm, access control are different systems, although the integration is relatively high in their respective large systems, but based on video The security integration between the access control and the alarm is somewhat weak, and the advantages and efficiency of security integration cannot be fully utilized, and the potential risks brought by the inefficient security system should be alert. In addition, between different lines of the subway The problem of security islands formed by the separation of security information will also become a hidden danger. Coupled with the increase of urban subway lines in China, the expansion of new projects, the integration of new and old systems, waste of investment costs and other issues have gradually surfaced. However, with the further deepening and improvement of the demand for the subway, the development of technology, and the further understanding of the manufacturers' demand for subway security, this situation will become more and more optimistic, and it is believed that the full cooperation will soon come. In fact, the systems related to subway security are not just video, access control and alarms. Relevant systems such as equipment monitoring systems, fire alarm systems, data transmission platforms and information broadcast systems should be part of the metro intelligent (weak) system. With the increasing emphasis on security by users, the integration of the overall security system has become a trend and has also been applied in some subway projects. Moreover, it is precisely because the integration of the subway security system involves many subsystems. Therefore, only when the systems are coordinated, deep integration can meet the requirements of the security system for rail transit development. At the same time, although the subway security system is developing towards openness and integration, it may be a product provided by different manufacturers to form a system. This requires the products of each manufacturer to achieve the docking between products through a unified interface. The integration of the system, so the openness and compatibility of the product is very important. I believe that until the systems truly solve the system compatibility and protocol problems, the era of true system integration will accelerate. High Temp Constant Power Heating Cable High Temp Constant Power Heating Cable,Self-Regulating Electric Heating Tape,Snowmelt Heating,High Temperature Electric Heating Tape JIANGSU PENGSHEN HIGH TEMPERATURE WIRE CABLE CO., LTD. , https://www.pengshencable.com
April 25, 2024