High-sensitivity infrared detection system

An infrared detection, high-sensitivity technology, applied in the electronic field, can solve the problems of inaccurate detection results and high sensitivity, and achieve the effects of fast response, high receiving sensitivity and accurate detection results

Inactive Publication Date: 2015-05-06
CHENGDU COPOO TECH
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  • Abstract
  • Description
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  • Application Information

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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 th

Method used

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Embodiment

[0016] Such as figure 1 As shown, the high-sensitivity infrared detection system of the present invention is composed of a sensor U, a power circuit connected to the sensor U, a two-stage low-pass filter amplifier circuit, and a two-stage low-pass filter amplifier circuit. The comparison circuit is composed of a conversion circuit connected with a power circuit. In order to make the detection system more sensitive to receiving external signals, the sensor U of the present invention adopts a dual-element pyro-infrared sensor.

[0017] Among them, the two-stage low-pass filter amplifying circuit is composed of amplifier P1, amplifier P2, capacitor C1 whose negative pole and positive pole are connected to the sensor U, one end is connected to the positive pole of capacitor C1, and the other end is in phase with the positive input terminal of amplifier P1. The connected resistor R1, the negative pole is connected to the negative pole of the capacitor C1, the positive pole is conn...

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Abstract

The invention discloses a high-sensitivity infrared detection system. The high-sensitivity infrared detection system is characterized by being formed by a sensor U, a power circuit, a two-stage low-pass filtering and amplifying circuit, a comparison circuit and a conversion circuit; the power circuit and the two-stage low-pass filtering and amplifying circuit are connected with the sensor U; the comparison circuit is connected with the two-stage low-pass filtering and amplifying circuit; the conversion circuit is connected with the comparison circuit and the power circuit; the two-stage low-pass filtering and amplifying circuit is formed by an amplifier P1, an amplifier P2, a capacitor C1, a resistor R1 and the like; a positive electrode and a negative electrode of the capacitor C1 are connected with the sensor U; one end of the resistor R1 is connected with the positive electrode of the capacitor C1; the other end of the resistor R1 is connected with a positive phase input end of the amplifier P1. According to the high-sensitivity infrared detection system, the detection system can be high in receiving sensitivity and high in response due to the double-element type pyroelectric infrared sensor and meanwhile a weak frequency signal received by the sensor can be amplified through the two-stage low-pass filtering and amplifying circuit in an undistorted mode and accordingly the detection result of the detection system can be accurate.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a high-sensitivity infrared detection system. 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 purpose of the present invention i...

Claims

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Application Information

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IPC IPC(8): G01J5/10
Inventor 车容俊高小英
Owner CHENGDU COPOO TECH
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