Select infrared camera should pay attention to what
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Infrared lamp's optional power supply should meet its minimum electric power as much as possible, and the irradiation distance is often insufficient.
Considering the degree of reflection of the scene being photographed, since infrared rays have the same characteristics as visible light such as reflection and refraction, a certain distance should be considered when there is no good reflective environment (such as buildings, walls, signs) around the target scene. the amount.
Fourthly, in order to solve this problem, many companies that manufacture infrared night-vision cameras adopt the technology of “infrared LED+ infrared color CCDâ€. Although these products partially solve the need for night-time monitoring, night-vision cameras that hinder night-time monitoring such as the following reasons are hindered. Features.
Infrared LED luminous tube quality is general, life is only 2000-3000 hours, the camera can only use less than a year to produce a fault, or because a single infrared LED luminous tube power is smaller, resulting in a shorter distance from the night vision camera.
Due to the adoption of an ordinary optical lens, the infrared light reflected from the LED lamp object at night monitoring can not be effectively focused on the CCD target surface, and the infrared night vision effect is greatly reduced.
In order to reduce costs, some companies adopt a software-enhanced DSP digital image processing chip with a horizontal resolution of only 420 lines. This chip's daytime image effect is close to the 480-line DSP digital image processing chip, and the effect of infrared light monitoring at night will produce more results. The noise directly affects the black and white sharpness of the image.
Production process is rough and technical defects, such as LED infrared lamp can not effectively cooperate with the lens and other components, night monitoring images produce halo or light spots; LED infrared lamp circuit part design is not reasonable, can not be a good distribution of voltage and current, short after installation The time caused the LED infrared lamp to burn.
The power required for the infrared camera requires high stability. Second, it requires sufficient power. Many customers have insufficient experience. When a poor quality power supply is purchased, insufficient or excessive voltage and current will disable the device. This is also the level at which customers reflect the most problems.