Analysis: How to prevent the fog from blocking the lens in the swimming pool monitoring

Speaking of stadium monitoring, there are really many benefits. Not only can hidden dangers be discovered in time, potential security threats can be blocked, but also personnel costs and energy can be saved. Therefore, more and more newly built sports venues now regard video surveillance as an important part of the site construction. As a result, a series of problems have also been brought about. No, a friend recently asked to install surveillance equipment in the swimming pool. Due to the relatively wet area, there will often be fog on the surveillance cameras, which will affect the quality of surveillance. After consultation with the author, in fact, problems such as fog and water vapor can be solved by the following ways.

In the first case, mist appears inside the machine:

The formation of fog and frost is caused by the condensation of saturated water vapor in the air, which is condensed into frost and fog due to the strength and weakness of the cold environment. During the work of infrared cameras, especially indoor cameras, fog or frost often forms on the window glass of the protective cover due to fog or water vapor in the venue. As a result, the camera cannot see clearly and directly affects the monitoring effect.

The solutions to this problem are also different from family to family. Increase the defrost circuit, open the vent hole, fill with nitrogen, add a fan, put a desiccant, etc. The method is different, and the effect is of course different, some can solve the problem, and some still can't 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, PCB board must not have residual flux, and the shading rubber sleeve is made of high-quality silicone material.

In the second case, frost and fog appear outside the machine:

The camera works in an environment with high humidity, and the window glass of the protective cover is prone to dirt, which causes the camera's sight to be blocked.

Solutions: 1. Add wipers to the protective cover and clean the glass by controlling the wipers. 2. Use invisible wiper window glass. Compared with ordinary window glass, invisible wiper window glass has the function of repelling water and dust.

Finally, for high humidity, some requirements for enclosure sealing

If the infrared camera is used in the north, there will be a large temperature difference between the inside and outside of the machine, and the front lens will appear fogging. Therefore, the machine must have a good seal and the protective cover must have good rain resistance. .

At this stage, the mainland technology has certain technical problems in terms of hermeticity. For example, the design of the casing, where the joints and screw interfaces are mostly leaky.

How to make the sealing better? The basic solution is this:

1. Add waterproof rubber sleeve, add water pad at the interface, play a waterproof role, the effect is more ideal.
2. Apply waterproof glue to the screw joints of the wiring to enhance the waterproofness.
3. The infrared camera adopts aluminum alloy shell to improve the accuracy of the interface, and the high-quality silicone material is used for bonding. The effect is also ideal.