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Building block architecture
At present, network video surveillance systems are designed with a single-center management system (limited system capacity), breaking the traditional design of so-called large and small surveillance system architectures, starting with functionality, and combining distributed design concepts to build flexible networks. The video surveillance system is a goal, and innovatively divides the system functions into separate “building blocksâ€. Each “building block†has its own specific function and also has a connection interface with other devices (see Figure 1).
The building block architecture is divided into: image source layer, transport layer, data storage layer, control operation layer, and management layer. The architecture has a clear hierarchy. Each layer of the architecture has a corresponding device to achieve these functions, and can be flexibly combined into different monitoring solutions according to different monitoring requirements. The system performance is stable and has wide applicability. Compared to a centralized architecture, the "building block" architecture has its unique advantages in terms of stability, security, and scalability.
Plan design The following will take XX Central Hospital as an example to introduce the flexible application of the “building block†architecture in the field of network video surveillance in the medical industry. Aiming at the problems of doctor-patient disputes, medical malpractices, disclosure of drug information, and lack of management tools in recent years, the XX Central Hospital has constructed a high-definition intelligent monitoring system to reduce disputes between doctors and patients and achieve visual management of hospital departments and improve hospitals. The comprehensive management level. This system has a total of 600 monitoring points, covering all floors, parking lots and other areas, and realizes centralized management. All points are monitored and stored for 24 hours, and outdoor points can be viewed at night.
This case will be based on the innovative "building block" architecture, constitute a complete and advanced all-digital high-definition intelligent monitoring system. The system is based on the network platform for transmission, can achieve plug and play effect, the system is easy to expand (add a block "building blocks" can), easy to install, users can access the system through the network anytime, anywhere, access to audio and video and alarm information. In terms of design principles, it focuses on the following aspects:
Practicality: high cost performance, easy maintenance, easy to use, low operating costs;
Reliability: The system has high security and reliability, and has sufficient anti-interference ability;
Extensibility: The system adopts a structured design and supports infinite capacity expansion. And according to future needs, to achieve intelligent analysis, etc.;
Compatibility: Can run under different operating platforms, and can intervene in the original DVR system, and is stable and reliable;
Flexibility: The system adopts a “building block†architecture and has flexible function configuration.
The overall architecture design XX Central Hospital HD intelligent monitoring system is mainly composed of monitoring center, network transmission layer and front-end video source layer (Figure 2).
Among them, the monitoring center is mainly composed of a system management server, an operation workstation, a digital matrix decoder and a video wall, and can manage all the devices in the system. The system management server is responsible for the management of all devices of the entire monitoring system. The digital matrix and decoder are responsible for digital video decoding on the video wall. The operation workstation is responsible for monitoring and playing back the images in the entire system. The storage server is placed in the equipment room due to on-site network and is responsible for storing video images in the hospital.
The network transmission layer is composed of a core switch and an access layer switch, which can provide a high-speed and stable Ethernet network for video signal transmission to ensure the timeliness and security of video signal transmission. The front-end video source layer is composed of an analog camera and an encoder or an HD network camera. The analog camera is responsible for the collection of live video images. The encoder is responsible for converting the analog signal into a digital signal and compressing it, and sends it to the master control center through the fast Ethernet network. . The HD network camera directly converts live video to high-definition digital signals and transmits them over Ethernet. The main functions implemented by the monitoring center are as follows:
Support real-time preview of front-end camera images, the current operation of the workstation to display the current work or background monitoring, support for TV wall large-screen viewing;
Support the interconnection of wireless network and monitoring network, realizing mobile phone monitoring through WiFi and 3G network;
It is possible to perform real-time backup of video files in the sub-center system or real-time storage of video images to further improve the security of the entire storage system.
Can accurately search historical video data; can playback historical video data;
Support multi-level password protection, prohibiting unrelated personnel from operating or maliciously modifying or deleting data;
Support real-time detection of working status of front-end equipment;
Support remote alarm, can receive front-end transmission network alarm signal.
"Building block" architecture advantages
It can be seen from the above scheme that the high-definition intelligent monitoring system of the modular architecture realizes corresponding functions such as real-time monitoring of video surveillance, video storage, and video forwarding. Through real-time monitoring of monitoring terminals such as video walls and mobile phones, it is ensured that the situation of various departments and departments can be monitored in real time, combined with various management measures, and the level of technological modernization and comprehensive management in hospitals can be improved; video surveillance through clear operating theatres It can improve the standardized operation procedures of surgery, reduce medical disputes, and provide visual medical teaching.
Servers with a load-balancing "building block" architecture run only a single function, and the load capacity is strong and stable. Taking a device management server as an example, its role in the architecture is to manage device access rights and time synchronization and real-time management. A single management server can manage up to 512 front-end IP and encoders at the same time.
The independent and stable "building block" architecture of each server can operate independently, reducing the loss of data to the customer in the event of a failure. A common destabilizing factor of network video surveillance lies in the influence of the network environment. The system using the modular architecture distributes all functions to different servers, and each server has its own connection to run independently, which reduces the network abnormality of a single device or The impact of hardware damage. If the management server has a network failure, the monitoring platform and storage platform can still work normally. The monitoring and storage server can continue to monitor and store all the points according to the assigned permission and enter the security mode, reducing the data loss in case of failure. Probability.
Easy to expand "Building block" architecture is adaptable to different projects, with simple Post-expansion and integration with other devices. The server selection of building block architecture can be matched according to different requirements, and a variety of network monitoring solutions suitable for small, medium and large scales can be combined. Especially suitable for the later development of large-scale projects, only need to add the appropriate modules for different functions, and support the integration of other equipment systems.
Conclusion
In summary, the “building block†architecture has unique innovations in the field of video surveillance in the medical industry. It also has stable and safe working conditions, as well as features that are concise and easy to expand, and can effectively improve the modernization of the hospital’s technical protection. Comprehensive management level.
How to use building block architecture HD intelligent monitoring system
The innovative “building block†architecture high-definition intelligent monitoring system can provide modern high-definition intelligent monitoring solutions for the hospital. Through the hospital's local area network, external network, WiFi network, 3G network and mobile phone monitoring, with a variety of administrative measures, comprehensively improve Comprehensive management level.