The video surveillance system in the railway system is generally divided into two parts: one part is called “integrated video surveillance system†and the other part is called “CCTV surveillance systemâ€. "Comprehensive Video Surveillance System" as a subsystem of the "communications service network" in the "communications system", responsible for key stations (throat area), inter-span railway sections, communications, signal rooms, traction power supply, power supply room Internal and external monitoring; "CCTV monitoring system" as a subsystem of the "passenger service system" in the "information system" uses a networked video surveillance system to achieve station square, pit stop throat, entrance lobby, and waiting Room, platform, etc. The two are separately constructed but closely related. The CCTV monitoring system is only configured with front-end equipment, rear-end display equipment, video storage equipment, and video server and other video management equipment. It is considered by the comprehensive video monitoring system in the four-electric system integration project.
Detailed explanation of the three-tier structure of railway security system
The current CCTV monitoring system in the railway system is the video monitoring system we often refer to. Based on the operating mode of the railway, the system can design the network topology of railway security as a three-level tree topology. The first-level node is The monitoring center of the railway bureau, the second-level node is the monitoring front-end for each station under the railway bureau, and the three-level node is the independent monitoring point for each station. See the example in Figure 1.
The primary node is mainly the monitoring center of each railway bureau, which is equivalent to the city/office general command center of Pingan City. It connects various railway systems, and selectively calls, controls, and plays back video resources of each railway as required, and generally sets up workstations, directory data servers, and backup servers for important video data.
The secondary node mainly monitors the front end for each station under the railway bureau, and it has a large number of users. It calls, plays back, and controls PTZ for the video resources in this section. Generally, at the road station node, a plurality of client workstations, storage arrays, storage servers, streaming media servers, decoders, and video wall terminals are generally set up, which are the backbone of the system and the core of the application. At the same time, setting up a management server can avoid the unnecessary investment in equipment brought about by the front-end monitoring stations and facilitate the centralized management of the authentication system.
The three-level node is an independent monitoring point and has a wide distribution of equipment. It is mainly responsible for the front-end acquisition and coding of video. The location of information collection points is mainly based on traffic lanes, platforms, and turnouts, and fully utilizes other defense equipment such as fire prevention, anti-theft, far-infrared monitoring, and intrusion detection.
Security Technology Development Process
Since the development of video surveillance technology, it has experienced the development stages of analog video surveillance systems, digital video surveillance systems, analog digital hybrid video surveillance systems, and IP network video surveillance systems. The IP network video surveillance system is a digital signal when it is output from an image acquisition device, a standard Internet network as a transmission medium, and a streaming media technology based on the standard TCP/IP protocol to realize the multiplex transmission of the video on the Internet and pass the design. The online video streaming server completes the video stream forwarding and alarm operations to realize the functions of command, scheduling, storage, and authorization control of the entire monitoring system.
The IP network video surveillance system not only has the advantages of computer's fast processing capability, digital information anti-jamming capability, convenient quick query recording, clear video images, and multiple images displayed on a single machine in the traditional local digital monitoring system, but also can effectively realize broadband. The advantages of the network, through the IP network, the monitoring objectives of any place where the coverage can reach will be combined into a complete, integrated system, and truly meet the needs of the current video surveillance system for remote, real-time, centralized control. The IP network video surveillance system mainly consists of front-end video capture devices, video data transmission media, central servers, and monitoring workstations (clients). At present, the railway video surveillance system also generally adopts the IP network video surveillance system, which provides a unified implementation platform for the railway station, alongside the railway line, the vehicle production safety video monitoring service, and the public works video surveillance.
Detailed explanation of the three-tier structure of railway security system
The current CCTV monitoring system in the railway system is the video monitoring system we often refer to. Based on the operating mode of the railway, the system can design the network topology of railway security as a three-level tree topology. The first-level node is The monitoring center of the railway bureau, the second-level node is the monitoring front-end for each station under the railway bureau, and the three-level node is the independent monitoring point for each station. See the example in Figure 1.
The primary node is mainly the monitoring center of each railway bureau, which is equivalent to the city/office general command center of Pingan City. It connects various railway systems, and selectively calls, controls, and plays back video resources of each railway as required, and generally sets up workstations, directory data servers, and backup servers for important video data.
The secondary node mainly monitors the front end for each station under the railway bureau, and it has a large number of users. It calls, plays back, and controls PTZ for the video resources in this section. Generally, at the road station node, a plurality of client workstations, storage arrays, storage servers, streaming media servers, decoders, and video wall terminals are generally set up, which are the backbone of the system and the core of the application. At the same time, setting up a management server can avoid the unnecessary investment in equipment brought about by the front-end monitoring stations and facilitate the centralized management of the authentication system.
The three-level node is an independent monitoring point and has a wide distribution of equipment. It is mainly responsible for the front-end acquisition and coding of video. The location of information collection points is mainly based on traffic lanes, platforms, and turnouts, and fully utilizes other defense equipment such as fire prevention, anti-theft, far-infrared monitoring, and intrusion detection.
Security Technology Development Process
Since the development of video surveillance technology, it has experienced the development stages of analog video surveillance systems, digital video surveillance systems, analog digital hybrid video surveillance systems, and IP network video surveillance systems. The IP network video surveillance system is a digital signal when it is output from an image acquisition device, a standard Internet network as a transmission medium, and a streaming media technology based on the standard TCP/IP protocol to realize the multiplex transmission of the video on the Internet and pass the design. The online video streaming server completes the video stream forwarding and alarm operations to realize the functions of command, scheduling, storage, and authorization control of the entire monitoring system.
The IP network video surveillance system not only has the advantages of computer's fast processing capability, digital information anti-jamming capability, convenient quick query recording, clear video images, and multiple images displayed on a single machine in the traditional local digital monitoring system, but also can effectively realize broadband. The advantages of the network, through the IP network, the monitoring objectives of any place where the coverage can reach will be combined into a complete, integrated system, and truly meet the needs of the current video surveillance system for remote, real-time, centralized control. The IP network video surveillance system mainly consists of front-end video capture devices, video data transmission media, central servers, and monitoring workstations (clients). At present, the railway video surveillance system also generally adopts the IP network video surveillance system, which provides a unified implementation platform for the railway station, alongside the railway line, the vehicle production safety video monitoring service, and the public works video surveillance.
Stop Valves are closed by screwing a rubber gasket down onto a seat in the middle of the valve. Pros only use small versions that act as shutoff valves for fixtures such as sinks and toilets and outdoor sillcocks. Flow is inefficient because of the circuitous route the fluid (water, in most cases) has to follow. It's important to orient the valve in the right direction with the arrow (cast into the side of the valve) aligned with flow direction. That way, water flows against the bottom of the rubber gasket. If the valve is put in backward, the flow will force the gasket away from the top of the valve.
Stop Valves, Shower Stop Valve, Water Stop Valves, Brass Stop Valve
ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsir-valve.com