Security monitoring What are the components of the system
1、 Presentation layer
What is required for remote monitoring to form a performance city is the most intuitive feeling, which shows the quality of the entire security monitoring system. For example, the monitoring TV wall, monitor, high tone alarm horn, automatic alarm connection telephone, etc. belong to Shenzhen security on this floor.
2、 Control layer
The control layer is the core of the whole monitoring project, and it is the most clear embodiment of the system technology level. Generally, we have two control modes - analog control and digital control. Analog control is an early control mode, and its console is usually controller Or it is composed of analog control matrix, which is suitable for small local security monitoring system. This control mode has low cost and low failure rate. However, for medium and large security monitoring systems, this mode is complex to operate and has no price advantage. At this time, we should choose digital control more wisely. Digital control takes the industrial control computer as the control core of the monitoring system. It changes the complex analog control operation into simple mouse click operation, reduces the huge analog controller stack into an industrial control computer, and changes the complex and large number of control cables into a serial telephone line. It turns medium and remote monitoring into a fact and makes it possible for Internet remote monitoring. However, the digital control is not perfect. The control host is very expensive, the modules are wasted, the system may collapse, and the control is lagging behind.
3、 Processing layer
The processing layer may be called the audio and video processing layer. It distributes, amplifies, segments, etc. the audio and video signals sent from the transmission layer, and organically connects the presentation layer and the control layer. Audio/video distributor, audio/video amplifier, video splitter, audio/video switcher and other equipment belong to this layer.
4、 Transport layer
The transport layer is equivalent to the blood of the security monitoring system. In small monitoring projects, our most common transmission layer equipment is video cable and audio cable. For medium and remote monitoring systems, we often use RF cable and microwave. For remote monitoring, we usually use the Internet as a cheap carrier. It is worth mentioning that the newly emerging transmission layer medium - network cable/optical fiber. Most people have a mistake in digital security monitoring. They think that the digital control security monitoring system used by the control layer is a digital security monitoring system, but it is not. The transmission medium of pure digital security monitoring system must be network cable or optical fiber. When the signal comes out of the acquisition layer, it has been modulated into a digital signal. The digital signal runs on the mature network at present, and theoretically has no attenuation, which ensures the lossless display of remote monitoring images, which is incomparable to analog transmission. Of course, high performance returns also require high cost investment, which is one of the most important reasons why pure digital security monitoring systems cannot be popularized.
5、 Executive layer
The execution layer is the command object of our control instructions. In some cases, it is not completely separated from the support layer and the acquisition layer mentioned later. We believe that the controlled object is the execution layer device. For example: PTZ, lens, decoder, smart ball, etc.
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For many years, the company has been committed to information system integration, Internet/Intranet software development, building a technical service network covering the whole country, and providing a complete set of solutions for large, medium and small users such as early planning, scheme design, application development, system installation, debugging and personnel training of information systems and weak current systems. So far, it has provided hundreds of large and medium-sized computer network systems and weak current engineering solutions in the fields of finance, insurance, securities, power, banking, civil aviation, railway, water conservancy, petrochemical, national defense, customs, telecommunications, scientific research institutions, etc.
