¿Cuál es la función del sistema de vigilancia CCTV y su composición?

1. The role of closed-circuit television surveillance systems

CCTV surveillance system is an image communication system.The signal is transmitted from the source point only to specific TV sets that are prearranged to be the same as the source point.Widely used in a large number of different types of surveillance work, education, video conferencing, etc.The closed-circuit television monitoring system is an important component of the security technology prevention system.It is an advanced comprehensive system with strong prevention capabilities.It can directly observe all the conditions of the monitored place through the remote control camera and its auxiliary equipment.The situation of the monitored place can be clearly seen at a glance.Video recordings are also provided for subsequent inquiry and analysis.At the same time, CCTV surveillance systems can also be combined with anti-theft alarm systems,Access control systems and other security technology prevention systems operate in conjunction, making their prevention capabilities more powerful.

2. Composition of CCTV surveillance system

CCTV surveillance systems can provide close observation, monitoring and control of certain important areas.The main equipment of the closed-circuit television monitoring system should be equipped with TV monitors, time-lag video recorders, image processors, etc.It enables users to view any picture and remotely operate the pan/tilt and zoom functions of any camera with remote control function.The CCTV surveillance system mainly consists of front-end, transmission and terminal.Front-end: used to obtain images of the monitored area: generally composed of cameras and lenses, pan/tilt, encoders, dust covers, etc.Transmission part: The function is to feed the video (sometimes including audio) signal output by the camera to the central computer room or other monitoring points:Generally composed of feeders, video cable compensators, video amplifiers, etc.Terminal: used for display and recording, video processing, output control signals, and receiving signals from the front end:Generally include monitors, various control equipment, and recording equipment etc.