监控设备的选择（Selection of monitoring equipment）.doc

监控设备的选择（Selection of monitoring equipment） Selection of monitoring equipment.Txt Selection of monitoring equipment in TV monitoring system Author: Source: Chengdu construction team leader system integration company update: 2009-12-8 23:54:36: * * * design index of 1641 cameras choice The camera is the core equipment of the TV monitoring system. It is very important to choose according to the users requirements. Now the security monitoring system for TV generally uses CCD camera, and the vacuum tube camera because it has small volume and light weight; small inertia; high sensitivity; image uniformity; good impact resistance; long life etc.. In practice, if the monitoring target illuminance is not high, and the user to monitor the image clarity required, should use monochrome CCD camera; if the color monitor user requirements, you should consider adding the auxiliary lighting device, or to choose the color black and white ? automatic conversion of the CCD camera, the camera when the surveillance target can not meet the illumination color camera requirements automatically transferred to the black and white camera. After deciding whether to use a black-and-white camera or a color camera, the question to consider is the technical specifications of the camera. The main indicators considered are as follows. 1.1 resolution (resolution) The ability of a camera to distinguish details of an image, usually represented by a television line (TVL). It depends on the number of pixels on the CCD chip, the resolution of the lens, and the bandwidth of the camera system. The black and white camera horizontal resolution in general to choose about 450TVL, considering the construction factors, the final definition of the system can meet the requirements of the industry standard GB/T166761996 in China 380TVL. Color camera horizontal resolution in general to choose more than 350TVL, because the human eye color is difficult to distinguish finer, so also can meet the requirements of the monit