Although infrared cameras are the “dominant party†in the night surveillance market, infrared cameras are not as good as fish in the daytime. The color cast of daytime monitoring images has become one of the obstacles of infrared cameras PK ordinary cameras. In addition, the infrared camera fog vapor has also become the focus of attention.
Problems such as fog and water vapor can be solved by the following ways.
In the first case, fog occurs inside the machine:
The formation of fog and frost is caused by the condensation of saturated steam in the air, which is condensed into frost and fog due to the strong and weak cold environment. During the working process of the infrared camera, especially the indoor camera often causes fog or frost on the protective window glass due to fog or water vapor. As a result, the camera cannot see the object directly, which directly affects the monitoring effect.
The solution to this problem is also different for each family. Increase the defrosting circuit, open vent holes, charge nitrogen, add fans, put desiccants, etc. The method is not the same, and the effect is certainly not the same. Some can solve the problem, and some still cannot solve the problem. However, from the most basic point of view, it is necessary to strictly control the cleaning of materials and try to prevent the presence of volatiles. For example, the PCB board cannot have residual flux, and the light-shielding rubber sleeve is made of high-quality silicone material.
In the second case, frost and fog appear outside the machine:
The camera works in a high-humidity environment, and the window glass of the protective cover is prone to dirt, causing camera vision to block.
Solution: 1. Increase the wiper on the protective cover and clean the glass by controlling the wiper. 2. Use invisible wiper window glass. Compared with ordinary window glass, the invisible wiper window glass has functions of repelling water, dust and the like.
Finally, some requirements for shell seals in case of high humidity
If the infrared waterproof camera is used in the north, there will be a large temperature difference between the inside and outside of the camera, and the front lens will be atomized. Therefore, it is required that the machine must have a good seal, and the protective cover must also have good rainwater protection. performance.
At this stage, there is a certain technical problem in the sealing technology of the mainland, such as the design of the housing, and in places such as joints and screw interfaces, where leakage occurs.
How to make sealing better? The basic solution is this:
First, add waterproof rubber sleeve, add water pad at the interface, play a role in waterproof, the effect is more ideal.
Second, in the connection screw mouth waterproof glue, enhance water resistance.
Third, infrared waterproof camera using aluminum alloy shell, improve the accuracy of the interface, and the use of high-quality silicone material, the effect is also more ideal.
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