Infrared camera floating snowflakes at night and solutions

Infrared cameras are quite strict in the installation and matching process because of their particularity. If it is not done properly, infrared cameras have many bright spots besides whitening and glare. In the evening, when it is snowing in the world, we think that it is incredible to specialize in infrared electronic security market. We took a few brands and tried it. If it wasn’t, the effect of the day was still in hand. At night, the snow was fluttering; so we did various experiments, tried to change the infrared lamp and circuit board, and tried to switch to the CCD. , have also been to different places to experiment, and later, to summarize the fact that there are more snowflake points for the following reasons: Insufficient infrared camera current causes snowflake points.

Some outdoor short-distance use of centralized power supply 12V is very convenient, but if it is a long distance, it should not be used to switch power 12V centralized; because a long-range infrared light heat, 12V power supply instability may lead to insufficient power; and all No built-in heat sink is prone to burnout when the current is unstable. Second, the current decay speed is high, which may cause the infrared lamp to fail to work properly. The illuminance of the CCD is relatively high and the auxiliary light of the infrared lamp is not obtained, so the snow drifts. With the wind;

Second, the infrared camera infrared light quality is poor, infrared light angle and infrared distance with the lens does not match the snow drift Many companies in order to facilitate their own procurement and installation, mixed with a variety of different angles of light use, so that the use of benefits It is because they can use different millimeter-sized lenses with the same type of lamp. The disadvantage is that people always feel that the angle and distance between the lamp and the lens are not suitable. When the angle is not suitable, flashlight phenomenon or narrow electric phenomenon is likely to occur; when the distance When you don't match, for example, if you use a 12MM lens, but use a light of 10 to 20 meters, then you will have a gray phenomenon; a distance is muddy, and the snow flutters in the near place; also, a poor quality infrared lamp In addition to decoration, the more lights there are, the more problems there are, the more concentrated the lights, the greater the amount of heat, and the easier it is to burn;

Third, handicraft issues:

When many people do it by hand, the infrared light is not concentrated, astigmatism; scattered light leads to light everywhere, but a gray phenomenon; the infrared light front end of the cotton file is not tight, concentrated infrared red light so a vast phenomenon;

Fourth, the built-in is a poor infrared camera, illumination is very high, many factories in order to obtain a brighter image under the same premise of infrared lights, artificially increase the sensitivity of the CCD; because many manufacturers use very The poor camera built-in, this kind of camera in the case of insufficient infrared light to supplement, in order to mention brighter, so artificially increase the gain sensitivity of the CCD, with us on the hard disk recorder to adjust the high brightness, it is prone to snow phenomenon of;

Fifth, the circuit design is irrational; we produce infrared cameras, not only to install infrared light directly into the camera and then on the line, but to be installed before the camera circuit redesigned and aging treatment. Many small-scale processing plants on the market use cheap electronic components, buy inexpensive infrared lamps, and directly use soldering irons for soldering. There are no redesigns or aging treatments for circuits; other factories that make low-end products, in order to save money, put The control board of the control circuit board is removed or integrated with the light board, which easily leads to the infrared lamp being subject to unstable current and heat, so that the inferior infrared light can not work normally.

Sixth, the other possibility is that in the case of outdoor dust, especially in the wild, it is possible that the infrared light in the camera shoots tiny particles that are invisible to the naked eye. In the open situation, the inner eye and the camera do not feel obvious; this is the environment;

In summary, there are many reasons for having more raw snow flakes, but the method is always more difficult than that. As long as the real reason is found, the solution is much simpler. As long as you are willing to spend the cost, take the time:

First, the use of high-stability transformers to solve the problem of current shortage; use a multimeter to test the voltage and current size to ensure the normal operation of infrared light;

Second, the use of high-quality infrared light; this is equally important, infrared light is not good, even the best current is not useful;

Third, replace the poor camera inside. It is possible that the camera's illumination is extremely high, but in the case of low outdoor light brightness, it is easy to appear snow; use black-and-white camera or color to black and white color camera;

Fourth, the use of double filter pieces or double glass structure, to improve the infrared light intake at night and the effective water mist impact lens;

Infrared cameras need to solve the following difficulties:

1 After installing the infrared lamp, it is necessary to re-set the circuit and aging; pay attention to manual issues, pay attention to the problem of infrared light spotlight; this requires the installation staff have a considerable sense of responsibility and patience;

2 The built-in camera requires a minimum of 0.1 illuminance, otherwise it is prone to snowflake; this requires the manufacturer to have the necessary investment and determination to deal with it carefully;

3 Infrared cameras with long-distance infrared cameras have relatively large power. Generally, cameras with 220V power supply with built-in high-quality transformers and fans must use high-quality infrared lamps to prevent the excessively bright or dazzling phenomenon of infrared lamps. Causes the image to be unclear or grayish-feeling; pay attention to the angle and distance of the infrared light while paying attention to its life;

5 To prevent astigmatism and excessive collection of light, astigmatism is prone to whiteness, and the collection of light is prone to flashlight phenomenon.