[ Huaqiang Security Network News ] Infrared camera is an indispensable camera device in security monitoring. It has a strong function and can be shot at night. It has a large share in the market, but there are still some problems, snowflake appears, the following are some of the main reasons for the emergence of snowflakes.
Since its introduction, infrared cameras have occupied most of the market in night vision surveillance with their outstanding advantages of night vision distance, strong concealment and stable performance. However, some users will encounter some troubles during use, such as: snowflake problem!
Six reasons for infrared camera snowflake <br> Because of its particularity, infrared camera is quite strict in the installation and matching process. If it is not operated properly, the infrared camera has a lot of snow spots in addition to the usual whitening and glare. In the evening, it is like snow in the world; at the beginning. Here is a summary of the reasons for snowflake generation:
First, the infrared camera current shortage causes the snowflake point to generate some outdoor short distance. It is convenient to use the centralized power supply 12V, but 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 instability of the 12V power supply may result in 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. I can't get the auxiliary light from the infrared light, so the snow flutters;
Second, the infrared camera infrared light quality is poor, the infrared light's angle and infrared distance do not match the lens, which causes the snow to float. Many companies use a variety of angles of different lights to mix and use together in order to facilitate their purchase and installation. It is their same kind of lamp that 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, the flashlight phenomenon or narrow electric phenomenon is easy to occur; If you don't 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, a little blurry, near the snow fluttering; and, inferior infrared lights 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;
Third, handicraft problems When many people manually, 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, concentrated infrared red light Therefore, a sky phenomenon;
Fourth, the built-in is a poor infrared 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 price very poorly. The camera is built-in. This kind of camera is brighter when it is not filled with infrared light. Therefore, artificially increase the gain sensitivity of the CCD. Just like we adjust the brightness on the DVR, it is very easy to appear snow. ;
Fifth, the circuit design is unreasonable; we produce the infrared camera not only to install the infrared light directly into the surveillance 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;
Sixth, the infrared light in the surveillance camera captures the small particles that are invisible to the naked eye. Another possibility is that in the case of dusty outdoor, especially in the wild, it may be the infrared light in the surveillance camera. The tiny particles that are invisible to the naked eye are photographed. This is not obvious when the infrared light is not turned on during the day; this is the environment!
Since its introduction, infrared cameras have occupied most of the market in night vision surveillance with their outstanding advantages of night vision distance, strong concealment and stable performance. However, some users will encounter some troubles during use, such as: snowflake problem!
First, the infrared camera current shortage causes the snowflake point to generate some outdoor short distance. It is convenient to use the centralized power supply 12V, but 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 instability of the 12V power supply may result in 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. I can't get the auxiliary light from the infrared light, so the snow flutters;
Second, the infrared camera infrared light quality is poor, the infrared light's angle and infrared distance do not match the lens, which causes the snow to float. Many companies use a variety of angles of different lights to mix and use together in order to facilitate their purchase and installation. It is their same kind of lamp that 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, the flashlight phenomenon or narrow electric phenomenon is easy to occur; If you don't 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, a little blurry, near the snow fluttering; and, inferior infrared lights 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;
Third, handicraft problems When many people manually, 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, concentrated infrared red light Therefore, a sky phenomenon;
Fourth, the built-in is a poor infrared 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 price very poorly. The camera is built-in. This kind of camera is brighter when it is not filled with infrared light. Therefore, artificially increase the gain sensitivity of the CCD. Just like we adjust the brightness on the DVR, it is very easy to appear snow. ;
Fifth, the circuit design is unreasonable; we produce the infrared camera not only to install the infrared light directly into the surveillance 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;
Sixth, the infrared light in the surveillance camera captures the small particles that are invisible to the naked eye. Another possibility is that in the case of dusty outdoor, especially in the wild, it may be the infrared light in the surveillance camera. The tiny particles that are invisible to the naked eye are photographed. This is not obvious when the infrared light is not turned on during the day; this is the environment!
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