Taking the network digital surveillance system as an example, the installation of surveillance equipment requires cameras, video recorders, monitors or monitors, switches, routers, network cables, power cables, crystal head , camera brackets and camera power supplies. Buy 30 megapixel camera is better, the camera is the most important thing is the actual use, enough on the line, and the current market of real 30 megapixel camera is the most applicable.
Installation of monitoring equipment is as follows:
1, the first to determine the location and number of monitoring installation, the number of wires to use, the number of hard disk recorders road, and other parameters, to determine the corresponding equipment parameters and lists, to the nearby science and technology market to install the list of equipment to purchase.
2, after the completion of equipment procurement, first according to the previous design of the camera installation location and monitoring host installation location for wiring, there is a ceiling where as much as possible from the ceiling side of the line, do not leave open wires. There is no ceiling place can be used wire pipe or wire channel, beautiful and generous.
3, line laying is completed after the start of the previously designed point of installation of surveillance cameras and 12V power supply, surveillance cameras need to be fixed camera bracket and self-tapping wire, at this time you need to use an impact drill first in the wall wall holes, stuffed with a good up plug, with self-tapping wire to fix the camera bracket. Then install the camera to the bracket gimbal.
4, front-end monitoring equipment is installed, but the installation of back-end equipment. The first program uses a video capture card, the video capture card is installed into the supermarket computer PCI slot, the use of computer hard disk for video storage. p>Surveillance cameras can be divided into the following categories:
1, the lens of the surveillance camera, in different applications, the types of lenses can be broadly divided into:
(1) wide-angle lens: angle of view of more than 90 degrees, generally used in elevator cars, halls and other large angle of view places;
(2) the standard lens: angle of view of 30 degrees or so, generally used in the aisle and community Perimeter and other places;
(3) telephoto lens: angle of view within 20 degrees, focal length from tens of millimeters to hundreds of millimeters, for long-distance surveillance;
(4) zoom lens: lens focal length range variable, can be changed from wide-angle to telephoto, wide-area perspective;
(5) pinhole lens: used for covert surveillance.
2, according to the imaging color:
(1) color surveillance cameras: for the scene of fine discrimination, such as identifying the color of clothing or scenery.
(2) black-and-white surveillance cameras: for poorly lit areas and areas where lighting can not be installed at night, only to monitor the location or movement of the scene, black-and-white surveillance cameras can be used.
3, according to the resolution of sensitivity and other divisions:
(1) image pixels below 380,000 for the general type, especially 250,000 pixels (512 * 492), the resolution of 400 lines of the most common products.
(2) Image pixels in more than 380,000 high-resolution type.