How to prevent fog from blocking the lens of infrared waterproof cameras?

Problems such as fog and water vapor can be solved in the following ways.

In the first case, fog appears inside the machine

The formation of fog and frost is caused by the condensation of saturated water vapor in the air. Due to the strong and weak differences in the cold environment, Condensation into frost and fog. During the working process of infrared cameras, especially indoor cameras, fog or frost will often form on the protective cover window glass due to fog or water vapor in the venue, causing the camera to be unable to see objects clearly, directly affecting the monitoring effect.

Each company has different solutions to this problem. Add a defrost circuit, open air holes, fill with nitrogen, add a fan, put in desiccant, etc. The methods are different, and the results are of course different. Some can solve the problem, and some still cannot. However, from the most basic point of view, it is necessary to strictly control the cleaning of materials and try to eliminate the presence of volatile matter. For example, there should be no residual flux on the PCB board, and the light-shielding rubber sleeve should be made of high-quality silicone material.

In the second case, frost or fog appears on the outside of the machine

The camera operates in a humid environment, and dirt is prone to appear on the window glass of the protective cover, causing the camera's view to be blocked.

Solution:

1. Add a wiper on the protective cover and clean the glass by controlling the wiper.

2. Use invisible wipers on the window glass. Compared with ordinary window glass, invisible wiper window glass has the function of repelling water and dust. Finally, in the case of high humidity, there are some requirements for the sealing of the shell. 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 fogged. Therefore, it is required that the machine must have a good The sealing performance must be good, and the protective cover must also have good rainproof performance.

At this stage, mainland technology has certain technical problems in terms of sealing, such as the design of the casing, joints and screw interfaces, etc., where water leakage often occurs.

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

1. Add a waterproof rubber sleeve and a water pad at the interface to play a waterproof role, and the effect is ideal.

2. Apply waterproof glue to the wiring screw opening to enhance waterproofness.

3. The infrared waterproof camera adopts an aluminum alloy casing to improve the accuracy of the interface, and is bonded with high-quality silicone material, and the effect is also ideal.

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