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Active infrared detection device

An infrared detection, active technology, applied in the direction of optical device exploration, etc., can solve the problems of weak anti-interference ability, decreased detection ability of active infrared detection equipment, limited detection type or range, etc., to achieve the effect of good anti-interference ability.

Active Publication Date: 2011-01-12
WUXI ZGMICRO ELECTRONICS CO LTD
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AI Technical Summary

Problems solved by technology

The typical representative of passive infrared detection equipment is pyro-infrared sensor, but its disadvantage is that it only receives infrared rays emitted by human body or animals, and the detection type or range is limited.
The disadvantage of active infrared detection equipment is that the anti-interference ability is very weak. In the case of changes in the detection or working environment, such as the detection environment being affected by light, different temperature differences in the working environment, etc., the detection ability of the active infrared detection equipment will be greatly reduced. falling situation

Method used

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Embodiment Construction

[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] One of the key points or characteristics of the active infrared detection device of the present invention is that the infrared signals emitted and received by the active infrared detection device are infrared signals modulated by the same modulation reference signal.

[0022] Please refer to figure 1 , which shows a structural block diagram of the active infrared detection device 100 in one embodiment of the present invention. The active infrared detection device 100 includes an infrared modulation module 101 , an infrared emitting module 102 , an infrared receiving module 103 , a receiving amplification module 104 and an infrared demodulation module 105 .

[0023] The infrared modulation module 101 modulates according to ...

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Abstract

The invention discloses an active infrared detection device. The device comprises an infrared modulating module, an infrared transmission module, an infrared receiving module and an infrared demodulating module, wherein the infrared modulating module modulates an infrared modulating signal according to a preset frequency; the infrared transmission module transmits the infrared modulating signal to detect an object; the infrared receiving module receives the infrared modulating signal reflected by the detected object; and the infrared demodulating module demodulates the infrared modulating signal according to the preset frequency. The active infrared detection device transmits and receives the infrared ray with a 'special mark' by a method for modulating and demodulating the transmitted infrared ray with the same frequency signal, eliminates most infrared jamming caused by environmental factors, and acquires excellent antijamming capacity.

Description

【Technical field】 [0001] The invention relates to an infrared detection device, in particular to an infrared detection device with anti-interference ability. 【Background technique】 [0002] Infrared detector (Infrared Detector) is a device that converts the incident infrared radiation signal into an electrical signal output. Infrared radiation is electromagnetic waves with wavelengths between visible light and microwaves, which cannot be detected by the human eye. In the prior art, infrared detection equipment has been widely used in human body detection, anti-theft monitoring and other fields. [0003] Infrared detection equipment is basically divided into two categories in principle, one is passive infrared detection equipment that detects by receiving infrared rays emitted by the object itself; the other is active detection by actively emitting infrared rays and receiving infrared rays reflected back by objects Infrared detection equipment. The typical representative o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V8/10
Inventor 李飞
Owner WUXI ZGMICRO ELECTRONICS CO LTD
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