High-sensitivity infrared detection system based on phase shifting

An infrared detection, high-sensitivity technology, applied in the field of electronics, can solve the problems of high sensitivity and inaccurate detection results, and achieve the effects of high receiving sensitivity, improved response speed and accuracy, and fast response.

Inactive Publication Date: 2015-03-11
CHENGDU CHUANGTU TECH
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of high sensitivity and inaccurate detection results of the current infrared

Method used

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  • High-sensitivity infrared detection system based on phase shifting

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Example Embodiment

[0018] Example

[0019] Such as figure 1 As shown, the high-sensitivity infrared detection system based on phase-shift processing of the present invention consists of a sensor U, a power supply circuit connected to the sensor U, and a two-stage low-pass filter amplifier circuit, which are connected to the two-stage low-pass filter amplifier circuit for grounding comparison The circuit is composed of a conversion circuit connected with the comparison circuit and the power supply circuit at the same time, and a phase shift processing circuit connected with the comparison circuit and the conversion circuit at the same time. In order to make the detection system more sensitive to external signal reception, the sensor U of the present invention adopts a dual-element pyro-infrared sensor.

[0020] Among them, the phase shift processing circuit consists of a phase shift chip U1, a transistor Q3, and a transistor Q4. One end is connected to the VCC+ pin of the phase shift chip U1, and the...

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Abstract

The invention discloses a high-sensitivity infrared detection system based on phase shifting. The high-sensitivity infrared detection system is characterized by being composed of a sensor U, a power source circuit, a two-stage low-pass filter amplifier circuit, a comparison circuit, a conversion circuit and a phase shifting circuit, both the power source circuit and the two-stage low-pass filter amplifier circuit are connected with the sensor U, the comparison circuit is connected with the two-stage low-pass filter amplifier circuit, the conversion circuit is connected with the comparison circuit and the power source circuit, the phase shifting circuit is connected with the comparison circuit and the conversion circuit and composed of a phase shifting chip U1, a triode Q3, a triode Q4 and a resistor R13, and one end of the resistor R13 is connected with a VCC+ pin of the phase shifting chip U1 while the other end of the same is connected with an IN1 pin of the phase shifting chip U1. By adopting the phase shifting circuit, response speed and accuracy of the high-sensitivity infrared detection system can be improved.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a high-sensitivity infrared detection system based on phase-shifting processing. Background technique [0002] Due to the unique advantages of infrared detection technology, it has been widely researched and applied in military, national defense and civilian fields. The application will be more extensive and the status will be more important. [0003] Infrared detectors are energy converters that convert invisible infrared radiation energy into other energy forms that are easy to measure. At present, infrared detection has been widely used in people's lives. For example, infrared thermometers commonly used by people use infrared detection technology. People bring great benefits. However, the sensitivity of the currently used infrared detection system is not high and the detection results are inaccurate, which easily causes people to misjudge. Contents of the invention [0004] The...

Claims

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Application Information

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IPC IPC(8): G01J5/56
Inventor 刘芳谢静
Owner CHENGDU CHUANGTU TECH
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