In recent years, with the deepening of the informatization reform of railway systems, network technology has been widely used in the daily production and management of railway systems. At present, the railway system, as an important national transportation sector, determines the normal operation of national production and life as a result of its daily stable operation. In addition, the large number of railway system departments, scattered locations, and complicated on-site environment have become major obstacles to daily maintenance. The implementation of a remote monitoring system within the railway system will greatly solve the above contradictions.
The remote monitoring system adopts network video server technology. Operators and leaders of various departments can use the existing computer network and office computer of the railway system to implement all surveillance sites or local crossings, stations and railways along the railway network at the dispatch center or local locomotive section. The monitoring will greatly reduce the workload of daily personnel patrolling, facilitating the timely detection of hidden dangers and ensuring safe production.
First, the application of remote monitoring system based on network video server on the railway In the past two years, the construction of the enterprise network of the railway system has been rapidly carried out. At present, this system private network has reached an unprecedented level in terms of coverage, channel bandwidth, and stable and reliable operation. Compared with the private networks of other domestic industries, the scale and performance are also among the best. Making better use of this resource will enable the company's safe production, cost-saving and efficiency enhancement as well as various management tasks to be raised to a new level.
The remote video surveillance system based on the network video server is very different from the traditional analog surveillance system in the way of composition. The complete remote monitoring system is mainly composed of three parts: field equipment (or simply referred to as Station equipment), channel transmission equipment and dispatch/aggregate control stations, dispatch center monitoring terminals (or simply master station equipment). Now introduce them separately.
1. The substation equipment is mainly composed of front-end equipment and network video servers. Front-end devices, such as surveillance cameras (color or black and white, fixed or active pan/tilt, fixed focus, or zoom), and various types of alarm input/output devices are identical to those used in traditional industrial television. So the core of the substation equipment is the video server. Since the network video server uses an embedded operating system, this device can integrate camera access and control, image digitization, compression coding, and network transmission into a compact box, making installation and debugging extremely convenient. At the same time, because this kind of equipment can be set up and managed remotely through the network, no on-site routine maintenance is required. In actual installation and use, the system's real-time performance, stability, and reliability are greatly improved compared with the microcomputer platform, and the daily maintenance workload is rather small, which is very suitable for an unattended environment. After installing the video server in the remote video surveillance system, not only is the equipment easy to install and debug, but more importantly, it can support multiple users in the network to watch or control all the monitoring sites at the same time. This has more important significance for the monitoring work.
2. Channel transmission equipment This part of equipment must be selected according to the communication channel. At present, there are mainly digital private lines (wired or wireless), ISDN, and networks (wired or wireless). To achieve satisfactory image quality, the channel bandwidth is recommended to be above 384Kbps.
3. Master station equipment The master station equipment mainly realizes the centralized management of the logged-in user and sub-station equipment, and the functions such as decompression and storage of video images. A simple master station may consist of one or more monitoring terminals, which often perform one-to-one or one-to-many video surveillance tasks in a time-sharing fashion. If you need to implement monitoring tasks such as alarms, videos, etc., these tasks can be performed by the software of the master station device.
In this way, users only need to set up a remote monitoring system server at the dispatch center of the railway bureau. Bureau leaders, chief engineers and related offices can use existing office computers to establish monitoring terminals.
Several monitoring terminals can also be easily established at the dispatching center and the central control station. These monitoring terminals do not need to be equipped with special microcomputers and laying video or control cables. As long as they use IE browser, they can monitor the stations, crossings, and business halls in the jurisdiction within the office, and complete the user management through the video server; the depot, camera grouping Remote priority setting and scheduling; video image storage, retrieval and playback functions.
Second, the main function of remote telepresence system Based on network video server remote monitoring system, in fact, is a multimedia technology as the core, covering the industrial control, communications, computer network technology more complex integrated system. It mainly completes the security monitoring of the on-site environmental space, and can visually manage or even verify the necessary production equipment. At the same time, there is concentration and remoteness (ie, a monitoring center manages at least a dozen or even hundreds of cameras at the same time, and is not limited by distance). The main functions of the remote monitoring system are divided into the following sections:
Real-time video surveillance on the monitoring terminal, receiving real-time images from the front end; selecting different cameras; controlling the pan/tilt rotation and camera zooming, focusing, etc.;
Centralized digital video recording supports various forms of digital video recording, such as motion detection recording, timing recording, and alarm linkage recording; it is convenient to search for recordings on the monitoring terminal, such as by time, location, and alarm volume. You can easily play back the selected video, and freely control the pause, fast forward/backward, and jog/retreat during playback.
With the continuous development of network technologies, video surveillance technology is also developing in the direction of networking, digitization, and modularization to meet the requirements of high stability, high reliability, and ease of installation and maintenance of video surveillance. After long-term practical application and on-site operation of various types of monitoring products, the remote monitoring system based on the network video server mode utilizes its modular advantages to provide a new management method for promoting the safety and quality production of the railway system.
The remote monitoring system adopts network video server technology. Operators and leaders of various departments can use the existing computer network and office computer of the railway system to implement all surveillance sites or local crossings, stations and railways along the railway network at the dispatch center or local locomotive section. The monitoring will greatly reduce the workload of daily personnel patrolling, facilitating the timely detection of hidden dangers and ensuring safe production.
First, the application of remote monitoring system based on network video server on the railway In the past two years, the construction of the enterprise network of the railway system has been rapidly carried out. At present, this system private network has reached an unprecedented level in terms of coverage, channel bandwidth, and stable and reliable operation. Compared with the private networks of other domestic industries, the scale and performance are also among the best. Making better use of this resource will enable the company's safe production, cost-saving and efficiency enhancement as well as various management tasks to be raised to a new level.
The remote video surveillance system based on the network video server is very different from the traditional analog surveillance system in the way of composition. The complete remote monitoring system is mainly composed of three parts: field equipment (or simply referred to as Station equipment), channel transmission equipment and dispatch/aggregate control stations, dispatch center monitoring terminals (or simply master station equipment). Now introduce them separately.
1. The substation equipment is mainly composed of front-end equipment and network video servers. Front-end devices, such as surveillance cameras (color or black and white, fixed or active pan/tilt, fixed focus, or zoom), and various types of alarm input/output devices are identical to those used in traditional industrial television. So the core of the substation equipment is the video server. Since the network video server uses an embedded operating system, this device can integrate camera access and control, image digitization, compression coding, and network transmission into a compact box, making installation and debugging extremely convenient. At the same time, because this kind of equipment can be set up and managed remotely through the network, no on-site routine maintenance is required. In actual installation and use, the system's real-time performance, stability, and reliability are greatly improved compared with the microcomputer platform, and the daily maintenance workload is rather small, which is very suitable for an unattended environment. After installing the video server in the remote video surveillance system, not only is the equipment easy to install and debug, but more importantly, it can support multiple users in the network to watch or control all the monitoring sites at the same time. This has more important significance for the monitoring work.
2. Channel transmission equipment This part of equipment must be selected according to the communication channel. At present, there are mainly digital private lines (wired or wireless), ISDN, and networks (wired or wireless). To achieve satisfactory image quality, the channel bandwidth is recommended to be above 384Kbps.
3. Master station equipment The master station equipment mainly realizes the centralized management of the logged-in user and sub-station equipment, and the functions such as decompression and storage of video images. A simple master station may consist of one or more monitoring terminals, which often perform one-to-one or one-to-many video surveillance tasks in a time-sharing fashion. If you need to implement monitoring tasks such as alarms, videos, etc., these tasks can be performed by the software of the master station device.
In this way, users only need to set up a remote monitoring system server at the dispatch center of the railway bureau. Bureau leaders, chief engineers and related offices can use existing office computers to establish monitoring terminals.
Several monitoring terminals can also be easily established at the dispatching center and the central control station. These monitoring terminals do not need to be equipped with special microcomputers and laying video or control cables. As long as they use IE browser, they can monitor the stations, crossings, and business halls in the jurisdiction within the office, and complete the user management through the video server; the depot, camera grouping Remote priority setting and scheduling; video image storage, retrieval and playback functions.
Second, the main function of remote telepresence system Based on network video server remote monitoring system, in fact, is a multimedia technology as the core, covering the industrial control, communications, computer network technology more complex integrated system. It mainly completes the security monitoring of the on-site environmental space, and can visually manage or even verify the necessary production equipment. At the same time, there is concentration and remoteness (ie, a monitoring center manages at least a dozen or even hundreds of cameras at the same time, and is not limited by distance). The main functions of the remote monitoring system are divided into the following sections:
Real-time video surveillance on the monitoring terminal, receiving real-time images from the front end; selecting different cameras; controlling the pan/tilt rotation and camera zooming, focusing, etc.;
Centralized digital video recording supports various forms of digital video recording, such as motion detection recording, timing recording, and alarm linkage recording; it is convenient to search for recordings on the monitoring terminal, such as by time, location, and alarm volume. You can easily play back the selected video, and freely control the pause, fast forward/backward, and jog/retreat during playback.
With the continuous development of network technologies, video surveillance technology is also developing in the direction of networking, digitization, and modularization to meet the requirements of high stability, high reliability, and ease of installation and maintenance of video surveillance. After long-term practical application and on-site operation of various types of monitoring products, the remote monitoring system based on the network video server mode utilizes its modular advantages to provide a new management method for promoting the safety and quality production of the railway system.
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