Analysis: the security video surveillance system technology

For security monitoring system, according to the system section of the function, we use the entire security system is divided into seven layers--presentation layer, control layer, processing layer, transport layer, layer, layer support layer, acquisition.

Of course, since the device integrated higher and higher, for part of the system, some devices may simultaneously to multiple layers of identity exists on the system.

1. the presentation layer

Presentation layer is the most intuitive feel, it shows the entire security monitoring system of quality.

Such as monitoring television wall, monitor, high-pitched alarm Horn, alarm automatically split the phone etc. belong to this layer.

2. the control layer

Control layer is the entire security monitoring system's core, it is a system of technology is the most specific embodiment.

Typically our control has two — analog control and digital control. Simulation control is early, the console is typically used by the controller or analog control matrix components, suitable for small local security monitoring system, which means lower costs, lower failure rate. But for medium and large security monitoring system, this way it is operating complex and no price advantage, then we should be more wise choice is the digital control. Digital control is the industrial computer as a monitoring system of control core, it will be a complex simulation control operations into simple mouse clicks, the great analog controller stack down to an industrial control computer, complex and large numbers of control cable to a serial line. It will become reality in the remote monitoring, remote monitoring for the Internet may be provided. But digital control is not so perfect, the control host prices are exorbitant, waste of the module, the system may appear full crash crisis, control more lag problems still exist.

III. processing layer

Perhaps the processing layer is called the audio and video processing layer, it will have over the transport layer to send audio and video signals to be distributed, amplification, segmentation, and so on processing, organic will exhibit floor and control layer to connect.

Audio and video distributor, AV amplifiers, video splitter, audio/video switch, and so on device belong to this layer.

4. transport layer

The transport layer is equivalent to a security monitoring system of blood vessels.

In the small security monitoring system, we are the most common transport layer device is a video cable, audio cable, for purposes of remote monitoring system in, we often use RF cable, microwave, remote monitoring, we usually use the Internet this cheap carrier. It should be noted that the new transport layer media — cable/fiber. Most people in digital security monitoring on a mistake, they consider that the control layer using digital control of security monitoring system is the digital security monitoring system, not necessarily. Pure digital security monitoring system of the transmission medium is a network cable or optical fiber. Signal from acquisition layer, you have a modem to a digital signal, digital signal in the now mature network running, theoretically no decay, which ensure the remote control display without loss of image, this is the analog transmission. Of course, high-performance returns also needs high-cost inputs, this is pure digital security monitoring system is not universal, one of the most important reason.

5. the execution layer

Executive floor is our control directives of a command object, at some point, it and us behind said supporting Cheng, acquisition layer is not very good in direct separate, we believe that the managed object that is to implement layer devices.

For example: head, lens, decoder, balls, etc.

VI. support layer

As the name implies, the support layer is used for back-end device support, protect and support acquisition, execution layer devices.

It includes bracket, the shield and auxiliary equipment.

VII. collection layer

Acquisition layer is the entire security monitoring system of quality is the key element is the most expensive system cost.

It includes a lens, camera, alarm sensor, etc.