Video surveillance engineering is now the mainstream security equipment. It has experienced the first generation of analog signal, the second generation of copper axis and the third generation of digital signal now in use. The cameras used in the third generation have also made great progress, from ordinary digital camera → infrared camera → starlight camera / full-color camera → starlight full-color camera → black light full-color camera. It's incredible that the black light full-color camera can shoot the full-color effect like the day in a full-black environment. In terms of image quality, the 8 megapixel camera has reached the 4K TV signal standard, and the bottleneck of preview picture clarity is only in your display screen. Of course, there are 4 million, 3 million and 2 million pixel cameras to meet different needs. The shooting effect of 2 million pixel camera can reach the previous mainstream 1080p TV signal.

The wiring mode of monitoring engineering has also developed from one power line and two signal lines to one network cable to solve signal transmission and power supply (POE power supply), which reduces the installation cost and maintenance cost. The installation effect is beautiful and generous. It basically does not need a small box socket and power adapter next to a camera.

1. A variable channel hard disk video recorder supports more than 2 channels of 4K image quality and preview at the same time, which is basically the ultimate for home use. Because to achieve 4K image quality during preview, one channel of 4K main code stream signal has to be output by a TV. Otherwise, the compressed sub code stream must be used for preview. The sub code stream will be compressed and output according to the actual situation of the screen.

2. A Poe switch with appropriate redundancy. Poe switch supplies power to AP nodes and cameras, which simplifies the construction difficulty and reduces the cable laying cost of the owner. If it is a multi-storey building, it is recommended to set up a sub switch on each floor while putting the core switch in the main weak current box, so as to greatly reduce the difficulty of wiring and future maintenance. Compared with the money charged by the decoration company for burying hidden lines, the money for buying equipment is very little.

3. It is recommended to use hemispherical camera indoors, which can be used for balcony, entrance, aisle and corridor. If you have high requirements for beauty and want to install cameras indoors, it is recommended to install elevator wide-angle flat cameras. However, in this way, you need to work closely with the carpenter. Finally, only a small part of the cameras are exposed, and most of the cameras are hidden in the ceiling. In the later stage, you have to approve the gray master to finish the construction, which is very difficult. The direction of the camera must be adjusted before the ash batch, so that no mistakes can be made in all links.

4. The gun type camera can be used for outdoor and balcony. This kind of construction is simple and not difficult. Select the corresponding model of camera according to the needs of the owner.

5. The ball machine camera, which can move the lens and up to 20 times the optical zoom, is mainly used to have a global grasp of the outdoors and a close-up of local areas. It is an effective supplement to the fixed camera.