What is a CCTV surveillance system?

The English abbreviation for the TV monitoring system is: CCTV (closed-circuit television). The closed-circuit television monitoring system is a comprehensive security system across industries. The system uses the world's most advanced sensing technology, surveillance camera technology, communication technology Computer technology forms a highly intelligent processing system with multi-functional and all-round monitoring. CCTV surveillance system has become the main method in the field of security prevention because it can give people the most direct visual and auditory feelings, as well as the visibility, real-time and objectivity of the monitored objects, and has been widely promoted and applied. .

A complete CCTV monitoring system is mainly composed of front-end audio and video data acquisition equipment, transmission media, terminal monitoring and monitoring equipment and control equipment. By installing fixed cameras or omnidirectional cameras in the monitoring area, the monitoring area can be monitored in real time. The signal collected by the camera is transmitted to the image distributor or amplifier through the transmission line, and then passed into the monitor to realize the overall monitoring of the monitoring area.

Front-end equipment: refers to the equipment that collects audio and video information at the front of the system. The operator obtains necessary information such as sound, image, and alarm that needs to be monitored through the front-end device. The front-end equipment of the system mainly includes cameras, lenses, pan-tilt, decoding controllers, ****** and alarm detectors.

Transmission medium: It is the transmission channel that transmits the information collected by the front-end equipment to the control equipment and terminal equipment. It mainly includes video cable, power cable and signal cable. Generally speaking, the video signal is transmitted by coaxial video cable, and it can also be transmitted by optical fiber, microwave, twisted pair and other media.

Control equipment: It is the most important part of the whole system, it plays the role of coordinating the operation of the whole system. It is through the control equipment that people obtain the required monitoring functions. Meet the needs of different monitoring purposes. The control equipment mainly includes audio and video matrix switching controller, control keyboard, alarm controller and operation console.

Terminal equipment: It is the equipment that the system integrates the acquired sound, image, alarm and other information and displays it in various ways. The system provides people with the most direct visual and auditory experience through the display of the terminal equipment, as well as the visibility, real-time and objective records provided by the monitored objects. System terminal equipment mainly includes monitors, video recorders, etc.