Users may have encountered such a situation: the camera is white, glaring, snow fluttering, and the snow is as follows at night. In response to this situation, the Hong Kong Zhiteng Technology Department has conducted many experiments (changing infrared lamps and circuit boards, changing CCDs, changing places, changing brands), and conducting internal and external investigations, summarizing the reasons for the situation:
Infrared light quality is poor, angle and infrared distance do not match the lens
In order to facilitate their purchase and installation, many companies use a variety of different angles of light to mix and use together. The advantage of using this type of lamp is that the same type of lamp can barely use different sizes of lenses. The disadvantage is that people always feel the angle and distance of the lamp. The lens is not suitable. When the angle is not suitable, the flashlight phenomenon or the narrow electric phenomenon is prone 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 there will be a gray phenomenon, the distance is blurred, the snow is fluttering nearby. Also, inferior infrared lamps, in addition to decoration, the more lamps, the more problems; the more concentrated the lamps, the greater the heat, the easier it is to burn.
Insufficient current leads to snowflake point generation
Outdoor short-distance use of centralized power supply 12V is very convenient, but if it is a long distance, it is not appropriate to use a switching power supply for centralized 12V power supply. Because the long-distance infrared lamp generates a large amount of heat, the instability of the 12V power supply will result in insufficient power, and in the case of unstable current, there is no built-in heat sink that is easy to burn out; in addition, the current decays quickly, resulting in the infrared lamp not working properly, plus The CCD illumination is relatively high and the infrared light is not available, so there is a "snow fluttering".
In a dusty environment
Especially in the wild, the infrared light in the camera took out the small particles that could not be seen by the naked eye. This is not obvious when the infrared light is not turned on during the day, and the snow flakes appear at night. This phenomenon is caused by the environment.
In addition, handicraft problems, built-in inferior cameras, unreasonable circuit design, etc. will also lead to "snow fluttering."
The above is the experimental experience shared with you. Here, we sincerely remind the vast number of engineering customers to use products with brand protection and better quality as the best solution to prevent problems.
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