[ Huaqiang Security Network News ] Recently, I often listen to many friends and users, reflecting that they use infrared cameras in addition to the usual whitening, glare, there are many snowflake points, at night, like the snow in the world; We also felt incredible with our colleagues in the R&D department of RTV, and made a special trip to the electronic security market that specializes in low-end infrared. I took a few brands and tried it. Otherwise, the daytime effect is still mixed. At night, the snow flutters; so, we I have done various experiments, tried to change the infrared lamp and the circuit board, and tried to change to the CCD. I also went to different places to experiment. Later, the summary of the situation of snowflake points has the following reasons: 
The reason of insufficient current causes the snowflake point to generate some outdoor short distances. It is convenient to use 12V for centralized power supply. However, if it is a long distance, it is not suitable to use the switch power to carry out centralized 12V power supply; because the long-distance infrared lamp generates a large amount of heat, the 12V power supply is unstable. It may lead to insufficient power; and all of the built-in heat sinks are prone to burnout in the case of unstable current; the second is that the current decays quickly, which may cause the infrared light to fail to work properly, and the CCD illumination is relatively high and the infrared light is not obtained. Auxiliary light, so the snow flutters;
The quality of the infrared lamp is poor, the angle of the infrared lamp and the infrared distance do not match the lens, which causes the snow to float. In order to facilitate the purchase and installation of the company, the company uses a variety of lamps with different angles to mix and use. The advantage of using the same kind of lamp is that they use the same kind of lamp. You can barely use different millimeter-sized lenses. The disadvantage is that people always feel that the angle and distance of the lamp are not suitable for the lens. When the angle is not suitable, flashlight phenomenon or narrow electric phenomenon is easy to occur; when the distance does not match, for example If you use a 12mm lens, but use a light of ten to twenty meters, then you will have a gray phenomenon; in the distance, there is a glimpse of the snow, and there is a low-infrared light, in addition to decoration, The more lights, the more problems, the more concentrated the lights, the greater the heat, the easier it is to burn out;
Handicraft problems Many people hand-made, the infrared light is not concentrated, astigmatism; scattered light causes light everywhere, but a gray phenomenon; the front end of the infrared light is not tight, the concentrated infrared red light is so a vast sky phenomenon;
Built-in is a poor camera, the illumination is very high. Many factories use the same infrared light to obtain brighter images, artificially increase the sensitivity of the CCD; because many manufacturers use the very inferior camera built-in inside for price competition. This kind of camera is brighter when it is not enough to fill the infrared light, so artificially increase the gain sensitivity of the CCD. Just like we adjust the brightness on the DVR, it is very easy to appear snowflake phenomenon;
Unreasonable circuit design We produce infrared cameras, not only to install the infrared light directly into the camera but then to do it, but to redesign and age the camera circuit before loading it. Many small-scale processing plants on the market use cheap electronic components, buy cheap infrared lamps, solder them directly with electric soldering irons, and do not redesign or aging the circuits. Other factories that do low-end products, in order to save money, The control board of the control circuit board is removed or integrated with the light board, which easily leads to the infrared lamp being unstable due to current instability, so that the inferior infrared lamp can not work normally;
In the case where there is more dust outside and more dust in the outdoor, especially in the wild, it may be that the infrared light in the camera captures the small particles that are invisible to the naked eye, which is not turned on during the day. Under the eyes, the inner eye and the camera do not feel obvious; this is the environment;
In summary, there are many reasons for the number of snowflakes, but the method is always more difficult. As long as the real cause is found, it is much simpler to solve.
The quality of the infrared lamp is poor, the angle of the infrared lamp and the infrared distance do not match the lens, which causes the snow to float. In order to facilitate the purchase and installation of the company, the company uses a variety of lamps with different angles to mix and use. The advantage of using the same kind of lamp is that they use the same kind of lamp. You can barely use different millimeter-sized lenses. The disadvantage is that people always feel that the angle and distance of the lamp are not suitable for the lens. When the angle is not suitable, flashlight phenomenon or narrow electric phenomenon is easy to occur; when the distance does not match, for example If you use a 12mm lens, but use a light of ten to twenty meters, then you will have a gray phenomenon; in the distance, there is a glimpse of the snow, and there is a low-infrared light, in addition to decoration, The more lights, the more problems, the more concentrated the lights, the greater the heat, the easier it is to burn out;
Handicraft problems Many people hand-made, the infrared light is not concentrated, astigmatism; scattered light causes light everywhere, but a gray phenomenon; the front end of the infrared light is not tight, the concentrated infrared red light is so a vast sky phenomenon;
Built-in is a poor camera, the illumination is very high. Many factories use the same infrared light to obtain brighter images, artificially increase the sensitivity of the CCD; because many manufacturers use the very inferior camera built-in inside for price competition. This kind of camera is brighter when it is not enough to fill the infrared light, so artificially increase the gain sensitivity of the CCD. Just like we adjust the brightness on the DVR, it is very easy to appear snowflake phenomenon;
Unreasonable circuit design We produce infrared cameras, not only to install the infrared light directly into the camera but then to do it, but to redesign and age the camera circuit before loading it. Many small-scale processing plants on the market use cheap electronic components, buy cheap infrared lamps, solder them directly with electric soldering irons, and do not redesign or aging the circuits. Other factories that do low-end products, in order to save money, The control board of the control circuit board is removed or integrated with the light board, which easily leads to the infrared lamp being unstable due to current instability, so that the inferior infrared lamp can not work normally;
In the case where there is more dust outside and more dust in the outdoor, especially in the wild, it may be that the infrared light in the camera captures the small particles that are invisible to the naked eye, which is not turned on during the day. Under the eyes, the inner eye and the camera do not feel obvious; this is the environment;
In summary, there are many reasons for the number of snowflakes, but the method is always more difficult. As long as the real cause is found, it is much simpler to solve.
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