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High-precision infrared temperature measurement method

An infrared temperature measurement, high-precision technology, applied in the field of infrared temperature measurement, can solve the problems of difficult to collect forehead temperature, distance error, focal plane array plane error, etc.

Inactive Publication Date: 2021-09-03
HEBEI GAODA TECH
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  • Abstract
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Problems solved by technology

[0004] At present, when using the infrared imaging module to measure the temperature of the human body, there are the following problems: face recognition is difficult, and it is not easy to collect forehead temperature; error

Method used

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Embodiment Construction

[0036] In order to facilitate those skilled in the art to understand the technical solution of this patent, the technical solution of this patent will be further described in the form of specific cases below.

[0037] A high-precision infrared temperature measurement method, comprising the following steps:

[0038] (1) Use the visible light camera and the infrared imaging module to observe the flow of people at the same position and in the same direction, and establish the mapping relationship between the visible light camera image and the infrared imaging module image;

[0039] (2) Use a constant temperature black body as a reference object for human body temperature, and the actual temperature of the constant temperature black body is known;

[0040] (3) Perform isothermal surface calibration and distance calibration on the error of the infrared imaging module;

[0041] The specific method of isothermal surface calibration is as follows:

[0042] (311) Set a copper plate w...

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Abstract

The invention discloses a high-precision infrared temperature measurement method, and belongs to the technical field of infrared temperature measurement. According to the invention, a visible light camera and an infrared imaging module are used for carrying out equipotential and same-direction observation on the stream of people; a constant-temperature black body is used as a reference object of the body temperature of the stream of people; isothermal surface calibration and distance calibration are carried out on the error of the infrared imaging module; the forehead of the human body is recognized through a face recognition method, the position of the forehead is found in an image collected by the infrared imaging module, and the temperature of the forehead is obtained; error correction based on isothermal surface calibration and distance calibration is performed on the temperature of the forehead and the temperature of the constant-temperature black body obtained by the infrared imaging module, and the corrected temperature of the forehead and the corrected temperature of the constant-temperature black body are output; and the corrected temperature of the constant-temperature black body is subtracted from the corrected temperature of the forehead, and the difference value is added to the actual temperature of the constant-temperature black body to obtain the forehead temperature of the human body. According to the invention, multiple means are adopted to correct infrared temperature measurement, temperature measurement can be carried out on multiple persons at the same time, interference of other heat sources is avoided, and the method has the characteristic of high precision.

Description

technical field [0001] The invention relates to a high-precision infrared temperature measurement method, belonging to the technical field of infrared temperature measurement. Background technique [0002] Infrared temperature measurement is a technology that uses infrared rays to measure temperature. Infrared refers to electromagnetic waves longer than 0.78 microns. Because it is outside the red of the visible light spectrum, it is called infrared, also known as infrared radiation. Among them, the part with a wavelength of 0.78-2.0 microns is called near-infrared, and the part with a wavelength of 2.0-1000 microns is called thermal infrared. [0003] In nature, all objects can radiate infrared rays. Therefore, infrared images formed by different thermal infrared rays can be obtained by using infrared detectors to measure the infrared difference between the target itself and the background. Specifically, the infrared detector converts the power signal radiated by the objec...

Claims

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Application Information

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IPC IPC(8): G01J5/00G01J5/52
CPCG01J5/0025
Inventor 边文广马广存王彦勋葛同府杜云东王力飞范会涛李景立景念王常涛靳闪闪
Owner HEBEI GAODA TECH
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