Revealing the tips and tricks for perimeter protection
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The need for perimeter protection is commonly seen in many industries and living scenarios. To establish the most successful perimeter protection, users may need these tips and tricks for smooth installation.
Choosing a suitable installation site
The installation site should provide a large visual field in an open space, without drastic changes in lighting conditions. The scene should be free of visual distractions and frequently moving targets. It should not include large obstacles around the target area that can block the view of intruders.
Sites with clearly-defined borders are ideal for installation, such as gated communities, store entrances, garage entrances, railways and highways. The absence of a physical barrier doesn’t impede one’s ability to protect a defined perimeter, however. Perimeter protection can be used to detect people falling into bodies of water or intruders on rooftops. The target filter can quickly distinguish a car driving on a sidewalk or people walking on a freeway on-ramp.
Selecting the right installation type
The installation type is also essential to successful perimeter protection. Cameras should be installed at a high position perpendicular to the area being monitored. The recommended installation height is greater than 9.8 feet (3 metres) and the maximum height varies with different lenses. The recommended installation angle is 0°- 45°.
Consider what the scene will look like at night. If the camera will be capturing vehicle headlights head-on, the drastic change in lighting conditions will negatively impact detection performance. If ambient light is not bright enough, detection accuracy may be impacted.
Using the right lens
The recommended lens is one with a focal length that’s wide enough to cover an entire perimeter if possible. If not, you can design using multiple perimeter protection cameras to provide full area coverage. Make sure the lens you choose is within the installation distance reference below.
For fixed lenses, use this reference table:
|Lens focal length (mm)||2.8||3.6||6.0||8.0||12||30|
|Installing distance (m)||6||8||13||17||26||65|
|Installing distance (ft)||19.7||26.2||42.7||55.8||85.3||213.2|
For vari-focal lenses, follow these guidelines:
· When the installation distance is between 16-72 feet (5-22 metres) from the target, select a lens with a focal length of 2.7mm~13.5 mm.
Ready to give it a try? Click here for step-by-step instructions on how to set up perimeter protection.
Want to know more about Dahua Technology’s perimeter protection solution and its application? Check out this video.