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.

Ignition System is an important component of gasoline engine, the performance of the ignition system is good or not to the engine power, fuel consumption and exhaust pollution and so on. All the equipment capable of producing an electric spark between two electrodes of the spark plug is called the engine ignition system. It is usually composed of battery, generator, distributor, ignition coil and spark plug.

When the gasoline engine compresses close to the top stop, the combustible mixture is ignited by the spark plug, which burns the external work, for which the spark plug is installed in the combustion chamber of the petrol engine. The function of the ignition system is to generate an electrical spark of sufficient energy between the two electrodes of the spark plug at timed intervals in accordance with the working order of the cylinders.

Electronic ignition system is generally divided into the following 3 categories:

(1) The ignition system consisting of electromagnetic, infrared or hall components is called Non-contact Point firearm, and the amplifying circuit is divided into transistor circuit and capacitor discharge circuit

(2) The ECU controlled ignition system is determined by the ECU microprocessor according to the crankshaft angle sensor signal to determine the ignition moment, so it does not break the electrical apparatus, only the distributor, according to the ECU to send the signal direct control ignition coil primary circuit Electronic.

(3) Non-distributor ignition system (distributor-less ignition) is currently the most advanced ignition system, the crankshaft sensor sent not only the ignition moment signal, but also the cylinder identification signal, so that the ignition system to the specified cylinder at a specified time to send the ignition signal, This requires a separate ignition coil per cylinder, but if it is six cylinder machine then 1, 6 cylinders, 2, 5 cylinders and 3, 4 cylinders are shared with a single point of the FireWire coil, that is, a total of three ignition coils, obviously every point in the ignition coil, there is always a cylinder is empty ignition, detection should be noted this point.

Ignition System

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