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Monitoring equipment refers to the collective name for equipment used in the installation, construction and technical implementation of monitoring systems. The monitoring system is mainly composed of four parts: camera part, transmission part, control and recording part and display part.
The camera part is the frontier part of the TV surveillance system and the "eyes" of the entire system. When the area to be monitored is large, a zoom lens can be installed on the camera so that the camera can observe farther and clearer; the camera can also be installed on an electric pan/tilt, which can drive the camera to move horizontally. and vertical rotation, allowing the camera to cover a wider angle.
In some cases, especially in outdoor applications, in order to prevent dust, rain, high and low temperatures, corrosion, etc., special protective covers should be installed on the camera and its lens, and even on the pan/tilt. There are corresponding protective measures.
The transmission part is the image signal path of the system. Generally speaking, the transmission part only refers to the transmission of image and sound signals. At the same time, since a control center is required to control cameras, lenses, pan-tilts, etc. through the console, the transmission system also includes the transmission of control signals. In terms of transmission methods, video lines are generally used for short distance transmission, twisted pair transmission is generally used for distances not exceeding one or two kilometers, and optical fiber transmission can be used for longer distances. For long-distance transmission, video signal amplification, image signal correction and compensation equipment is also required.
The control and recording part is responsible for controlling the camera and its auxiliary components (such as lens, pan/tilt), and recording images and sound signals. At present, the technology of hard disk video recorder has been relatively developed. It can not only record images and sounds, but also includes functions such as picture splitting and switching, PTZ lens control, etc. It basically replaces the picture switcher, picture splitter, and PTZ used in the past. Controllers, lens controllers and other products. If the customer requires very convenient control of the pan/tilt and lens (especially the high-speed dome), a control keyboard can be added.
The display part generally consists of several or multiple monitors. When the number of cameras is not large and the requirements are not very high, generally the monitor can be directly connected to the hard disk video recorder. If there are a large number of cameras and complex switching of images on multiple monitors is required, a "matrix" must be equipped to achieve this.

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