Video surveillance system application type

Video surveillance system application type

1. Small and medium TV monitoring system

The usual TV monitoring system is not large in scale and its functions are relatively simple, but its scope of application is very wide. The monitored objects are not limited to the people, commodities, goods or vehicles that are thought of. Some application systems also involve monitoring such as natural gas tanks and high ink melon furnaces, while other application systems need to bend the factory chimney and sewage pipes Monitor. The TV monitoring system can be self-contained or combined with an anti-theft alarm system or an entrance and exit control system to form a comprehensive security monitoring system. Generally speaking, the camera monitoring points of a typical small and medium-sized TV monitoring system do not exceed 32, and the cost is mostly tens of thousands to hundreds of thousands of yuan.

2. Simple fixed-point monitoring system

The simplest fixed-point monitoring system is to install a fixed-point camera (the camera is equipped with a fixed-focus lens) on the monitoring site, and transmit the video signal to the monitor in the monitoring room through the coaxial cable. For example, a camera is placed at the gate of a small factory, and the video signal is transmitted to the monitor (or TV) in the factory office through the coaxial cable, and the management staff can see who is late for work or leaves early. Whether the items in the factory were carried at the factory. If you configure another video recorder, you can also record the monitoring screen for future retrieval and verification.

This simple fixed-point monitoring system is suitable for a variety of applications. When the number of cameras is large, it can be monitored by multiplexer, screen splitter or system host. Take the headquarters of a famous foreign company as an example. The headquarters has lost high-end laptop computers many times. Later, all 12 exits on its floors were equipped with fixed-point cameras and equipped with three four-screen splitters and 24-hour real-time video recorders To prevent the above-mentioned theft.

A guest house also uses this simple fixed-point monitoring system. This is to install a fixed-point black and white camera at each end of the guest room channel on the 1st to 6th floors, plus a total of 16 cameras at 4 monitoring points such as the entrance, hall, back door, and parking lot, and then configure a 16-screen splitter, A 29-inch large-screen color TV and a 24-hour video recorder constitute a complete monitoring system.

When the number of monitoring points increases, the system scale will become larger, but if there is no other additional equipment and requirements, this type of monitoring system can still be classified as a simple fixed-point system. Take the CCTV monitoring system of a supermarket as an example. The business area is large (the total of about 16000? On the upper and lower floors), the shelves are more, and a total of 48 fixed-point black and white cameras are installed. The signals of these 48 cameras are divided into 3 groups, which are respectively connected to the corresponding 16-screen splitter, 17-inch black and white monitor and 24-hour video recorder (the supermarket's actual project additionally adds an anti-theft alarm system and public broadcasting / background music System, omitted here).

3. Simple all-round monitoring system

The omni-directional monitoring system is to replace the fixed-focus lens in the aforementioned fixed-point monitoring system with an electric zoom lens, and add an omni-directional pan / tilt (two motors inside the pan / tilt) that can move up, down, left, and right, so that the camera at each monitoring point can When scanning up, down, left, and right, the focal length of the lens equipped with it can also be changed within a certain range (the surveillance scene can be zoomed in or out). Obviously, the movement of the gimbal and motorized lens needs to be controlled by the controller or the decoder that cooperates with the system host.

Compared with the simplest fixed-point monitoring system, the simplest omnidirectional monitoring system adds an omnidirectional pan-tilt head and electric zoom lens to the front end, and a controller to the control room. In addition, more is needed from the front end to the control room Route a multi-core (10-core or 12-core) control cable. Taking the monitoring system of a small garment factory as an example, two omnidirectional cameras were installed in its garment workshop, and an ordinary TV, a switcher and two controllers were installed in the factory manager ’s office. When you need to know the workshop situation, you only need to select the screen of a certain camera through the switch, and operate the controller to make the camera scan the entire monitoring site, and you can also perform spot monitoring on a certain part.

In practical applications, it is not necessary to configure every monitoring point in all directions. Usually, only a few special monitoring points in the entire monitoring system are equipped with all-round equipment. For example, in the aforementioned fixed-point monitoring system of a guest house, it may also be considered to change the fixed-point camera that monitors the parking lot situation to an omnidirectional camera (replace the electric zoom lens and increase the omnidirectional pan / tilt), and then add a control in the control room Device, so that the monitoring range of the parking lot can be expanded, not only can scan the entire parking lot, but also can monitor a certain part. Especially when advancing the lens, you can also see the license plate number.