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Method for automatically adjusting brightness of infrared light source

A technology of light source brightness and automatic adjustment, applied in the field of infrared sensors, can solve the problems of complex and changeable brightness feedback signals, and achieve the effect of fast and accurate adjustment

Pending Publication Date: 2022-08-05
CHINA KEY SYST & INTEGRATED CIRCUIT
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

And because the infrared light source is installed at different angles in the structure, the brightness feedback signal is complex and changeable

Method used

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  • Method for automatically adjusting brightness of infrared light source

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Embodiment Construction

[0025] A method for automatically adjusting the brightness of an infrared light source proposed by the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become apparent from the following description and claims. It should be noted that the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

[0026] The present invention provides a method for automatically adjusting the brightness of an infrared light source, based on such as figure 1 The overall hardware block diagram shown includes a processor, an infrared light source control circuit, a conversion circuit, an infrared light source and a detection element; it is implemented in the processor through a programming language, the infrared light so...

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Abstract

The invention discloses a method for automatically adjusting the brightness of an infrared light source, and belongs to the field of infrared sensors. Calculating a difference value SetDelta Value between a set value which the brightness of the infrared light source needs to reach and a feedback value corresponding to the brightness of the current infrared light source, an initial light source brightness adjustment amount Regulated InitialValue and a light source brightness control amount ControlValue in the current processing cycle; when the processor is in the starting state, the ControlValue is equal to Regulation InitialValue; when the brightness of the infrared light source needs to reach a set value to be changed, the ControlValue is equal to the sum of the Last ControlValue and the Regulated InitialValue, and the Regulated InitialValue is equal to the sum of the Last ControlValue and the Regulated InitialValue; wherein the Last Control Value is the brightness control quantity of the light source in the last processing cycle; the brightness control state requirement of the infrared light source after the current processing cycle is determined by the difference value between the brightness output value which the infrared light source finally needs to reach and the current feedback value; when the brightness output value is greater than the current feedback value, the brightness needs to be increased; when the brightness output value is smaller than the current feedback value, the brightness needs to be reduced; when the brightness output value is equal to the current feedback value, the brightness does not need to be changed. The adjustment time of the infrared light source from the current brightness to the set brightness can be shortened.

Description

technical field [0001] The invention relates to the technical field of infrared sensors, in particular to a method for automatically adjusting the brightness of an infrared light source. Background technique [0002] Infrared sensors generally include optical systems, detection elements and conversion circuits, and are often used for non-contact measurement, temperature, gas composition, water quality composition analysis and other purposes. When the optical system, detection element and conversion circuit have been determined, it is required that the infrared emitting device in the optical system can quickly achieve a stable output effect. As a deterministic light source, the light source reaches the detection element after passing through the measured substance, and the analog quantity is converted into measurement data after being processed by the corresponding conversion circuit. In the above content, the measurement data obtained by the detection element and the conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B47/11G01J1/42
CPCH05B47/11G01J1/42Y02B20/40
Inventor 陈翔尚宇
Owner CHINA KEY SYST & INTEGRATED CIRCUIT
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