Method for performing adaptive quantization adjustment on power of infrared lamps of infrared camera

An adaptive quantization and infrared camera technology, which is applied to the layout of electric lamp circuits, lighting devices, light sources, etc., can solve the problems of large control errors and the inability to adaptively adjust the power of infrared lamps, etc., to reduce heat generation, save power, extend The effect of service life

Inactive Publication Date: 2013-09-25
ZHEJIANG DAHUA TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiency that the infrared light control method of the existing infrared camera cannot adaptively adjust the power of the infrared light or has a large control error, the present invention provides an adaptive quantitative adjustment method for the infrared light power of the infrared camera

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  • Method for performing adaptive quantization adjustment on power of infrared lamps of infrared camera
  • Method for performing adaptive quantization adjustment on power of infrared lamps of infrared camera

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Embodiment Construction

[0013] The purpose and effects of the present invention will become more apparent by describing the present invention in detail according to the accompanying drawings and embodiments.

[0014] Such as figure 2 As shown, the infrared light power adaptive quantization adjustment circuit of an infrared camera of the present invention is mainly composed of integrated circuit U1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, capacitor C8, and NPN type triode Q2, PNP type triode Q1 and some infrared lamps (6 infrared lamps are shown in the figure, are LED1, LED2, LED3, LED4, LED5, LED6 successively, in the actual use process, can be any infrared lamps, the effect of the present invention will not be affected) composition. In this circuit, the processor is connected to pins 4, 9, 10, and 11 of the integrated circuit U1 through ordinary IOs; one end of R1 is connected to a 12V power supply, R1, R2, R3, R4, R5, R6, and R7 are connected in series in sequence, and one end of R7 is grou...

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Abstract

The invention discloses a circuit and a method for performing adaptive quantization adjustment on the power of infrared lamps of an infrared camera. The circuit consists of an integrated circuit U1, resistors (from R1 to R9), a capacitor C8, an NPN triode Q2, a PNP triode Q1 and a plurality of infrared lamps. The method comprises four steps of: initializing a current value, calculating image brightness values, comparing the brightness values and adjusting a driving current value, wherein when the infrared camera is under a condition of low illumination, the brightness of the infrared lamps can be effectively controlled by performing adaptive feedback calculation according to the brightness conditions of the images and adjusting the service power of the infrared lamps in a mode of changing a quantization driving voltage, so that on the premise of not influencing the image quality, the method has the advantages of overcoming the defects of the conventional method, saving power, reducing a heating value and prolonging the service life of equipment, along with low cost and stable and reliable circuit.

Description

technical field [0001] The invention relates to the field of security monitoring, in particular to a method for self-adaptive quantitative adjustment of infrared lamp power of an infrared camera. Background technique [0002] At present, when infrared cameras in the field of security monitoring use infrared lights, after detecting insufficient ambient illumination through the photoresistor, all the infrared lights in the device are turned on, and they work at full load at the set rated power, and the infrared lights cannot be adjusted according to the actual situation. Using power, some infrared cameras use the resistance value of the photoresistor after being illuminated to adjust the power of the infrared lamp. Because in the time period when the infrared light needs to be turned on in the actual monitoring situation, most of the time the illumination required by the camera can be achieved without the full load power of the infrared light. There is also a large error in t...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H05B37/02
Inventor殷俊张兴明吴坚
OwnerZHEJIANG DAHUA TECH CO LTD