How can monitoring equipment prevent the appearance of "fog"
With regard to how monitoring equipment can prevent the appearance of “fog,” a friend recently asked me a question. He said that the monitor equipment in the swimming pool is often humid due to the dampness in the venue, and there is often fog on the monitoring equipment. Monitoring quality. After consulting with the author, in fact, 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 shield window glass due to fog or water vapor in the stadium, resulting in the camera being unable to see the object and directly affecting 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 camera is applied 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 good sealing performance, and the protective cover must also have good rainwater resistance. .
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, the infrared camera uses aluminum alloy shell, improve the accuracy of the interface, and the use of high-quality silicone materials, the effect is also more ideal.
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