Frequently friends have mentioned how many monitoring points are planned for 1000 square meters. Today we will sum up how the camera points are planned!
In the actual situation, some video surveillance points have problems such as lack of systematic planning and lack of scientific design. How to more accurately select monitoring points? And what needs to be noted when selecting and installing cameras?
Monitoring point planning
According to the characteristics of key regions and the existing monitoring points, according to actual combat needs, the planning ideas of “surrounding, complementing, linking, and combining†are proposed:
Wai: As the name implies, it encloses the target area and forms a closed circle. The first is to control all the entrances to and exits from the city, the second is to control all entrances and exits in the main city, and the third is to control the entrances and exits of local jurisdictions to ensure 100% effective coverage of the main entrances and exits, and to achieve a clear image of any person entering, leaving, vehicles, and objects; All access areas can reach effective coverage.
Even: Control the entrances and exits of all key locations, key locations, and key locations; combine the surrounding camera distribution with the main roads in the urban area to form a continuous line to form a number of interconnected closed loops to ensure that multiple moving targets can be captured.
Replenishment: Make up for various types of closed loops: Ensure that the target must be able to reach a clear coverage when passing through the various layers of closed loops, and properly plan the closed loops where each jurisdiction overlaps each other so as to avoid redundant construction and construction.
Fill up the closed loop: Mainly in the closed circle of the police station, supplement the monitoring points for the key units, key locations, and key parts that have been classified, especially for areas with high incidence of the case, etc., according to the actual situation, select the type of camera to make up points.
Integration: Integrate social resources, and give play to the auxiliary role of social resources in the prevention and control of public security. In particular, the video resources of the entrances and exits of closed key units must be fully utilized to form a powerful supplement to the closed circles at all levels.
Some principles of installation
1, the choice of pole position when considering environmental factors
(1) The distance between pole point and pole point is not less than 300 meters in principle.
(2) In principle, the position of the pole should not be less than 5 meters from the monitoring target area, and the maximum distance must not be greater than 50 meters. This can ensure that the monitoring screen can contain more valuable information.
(3) Where light sources are nearby, light sources are preferred. But pay attention to the installation position of the camera should be in the light direction.
(4) Try to avoid installing in places with high contrast. If it is necessary to install, consider: 1 Open exposure compensation (the effect is not obvious);
2 using fill light;
3 Set the underground camera outside the entrance and exit;
4 Set it a bit in the channel.
(5) The position of the pole shall be as far as possible to avoid the greening trees or other obstructing objects. If it is necessary to install it, consideration shall be given to avoiding the blockage of the trees or other shelters, and to leave room for the subsequent growth of the trees.
(6) When surveying, it is necessary to pay attention to, as far as possible from the * signal, street light distribution box, the government, larger companies, institutions (such as: government departments, public transport companies, water supply groups, hospitals, etc.) to take power, to facilitate coordination, Improve the stability of electricity. Try to avoid electricity for small business users, especially for civilian use.
(7) The bolting machine installed on the side of the road shall pay attention to the reverse shooting of pedestrians and non-motor vehicle lanes.
(8) The camera installed at the bus station should be arranged in the direction of the rear of the vehicle as far as possible to avoid the headlights of the vehicle and facilitate the capture of people on the bus.
2, the choice of pole for different cameras
Reasonably select the rods to avoid the camera being shielded in the selection of social security monitoring rods. According to different camera types, it is advisable to choose the height of the manuscript that meets the best monitoring effect: the height between 3.5-5.5 meters can be used as a choice height.
(1) Selection of gun camera height
For the selection of gun-type camera poles, try to select the type of rod with a relatively low height, usually choose a pole with a height of 3.5-4.5 meters.
(2) The selection of the height of the dome camera.
The dome camera can rotate 360 ​​degrees and the focal length can be adjusted. The rods selected by all dome cameras should be as high as possible. Usually we choose the type of rod between 4.5-5.5 meters. The various heights of the above-mentioned rods should be based on the distance between the position of the poles and the monitoring target position and the viewing direction, so as to avoid the appropriate monitoring content when the cross arm is too short. In a sheltered environment, one metre or two feet of cross arm should be selected to reduce obstruction.
The choice of camera type
The basic principle for the selection of surveillance cameras should be to meet the actual business application as the goal, combining the specific conditions of the surveillance site and target range, and scientifically and reasonably select the types of cameras.
(1) High-resolution cameras should be adopted in high-incidence locations, public complex places, key sensitive areas that are prone to mass incidents, major road sections, densely populated areas, and important guard targets;
(2) In monitoring points such as key locations, surrounding areas of key units, parks, plazas, scenic spots, and traffic sections, if it is necessary to monitor a large area and the entire scene, it is also necessary to identify the facial features of the personnel through lens zooming and pan-tilt control. Vehicle license plates and local scene conditions, should adopt high-speed dome camera or pan-tilt;
(3) In areas such as back streets and lanes, off-road sections, and public security blind spots, where there are few personnel vehicles and there are many parts and angles that need to be monitored at the same time, smart dome cameras with functions such as preset point cruise and pattern scanning should be adopted;
(4) The ambient lighting conditions at night are relatively poor, and it is not suitable for the monitoring points that use the incandescent light to fill the light. An infrared camera or a star-level camera should be used.
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