Method for measuring influence of background factors to infrared temperature measurement

A technology of infrared temperature measurement and measurement method, applied in the direction of measuring device, optical radiation measurement, radiation pyrometry, etc., can solve the problems affecting the accuracy of temperature measurement, and achieve the effect of improving accuracy

Inactive Publication Date: 2010-08-18
CHINA JILIANG UNIV
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Problems solved by technology

The previous data are qualitatively indicating that the external background environment has an impact on infrared temperature measurement, because the actual temperature measurement, the object is in ...

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  • Method for measuring influence of background factors to infrared temperature measurement
  • Method for measuring influence of background factors to infrared temperature measurement
  • Method for measuring influence of background factors to infrared temperature measurement

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Embodiment Construction

[0016] Black bodies have certain particularities in radiation temperature measurement, that is, for black bodies, the impact of changes in ambient temperature on the output signal of the infrared detector is zero, and the image grayscale does not change when reflected on the thermal image. The proof process is as follows:

[0017] Formula (1) is the basic formula of an infrared temperature measurement system:

[0018] V s =K[εf(T 0 )+(1-ε)f(T u )]…(1)

[0019] where V s is the voltage signal output by the infrared detector, K is a constant, ε is the emissivity of the object, T 0 is the real temperature of the surface of the object, T u for the ambient temperature at that time.

[0020] If the infrared temperature measurement system operates at different ambient temperatures T 1 ,T 2 The temperature measurement experiment is carried out under the following conditions, and the other experimental conditions are not changed, then the formula (1) can be obtained

[0021] ...

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Abstract

The invention discloses a method for measuring influence of background factors to infrared temperature measurement. The method comprises the following steps of: memorizing calibrated experimental data into a software system for measuring the influence of the background factors to the infrared temperature measurement; starting a black body, an infrared thermal image component, an industrial personal computer and a measuring software system; acquiring and displaying a thermal image video though an image acquiring card by the software system after the block body is constant at a certain temperature T, adjusting the parameter of the infrared thermal image component, and memorizing the thermal image in the form of bmp after the thermal image is clear; opening the memorized thermal image, selecting a black body region in the thermal image, and reading the mean gray level of the black body by the system; calling a database to search the calibrated gray level corresponding to the T temperature; and obtaining the error between the mean gray level and the calibrated gray level, wherein the error reflects the degree of the influence of the background factors to the infrared temperature measurement. The method can quantificationally measure the influence of the background factors to the infrared temperature measurement when practically measuring the temperature, wherein in result can be used in the compensation of the temperature measurement to finally improve the accuracy of the temperature measurement.

Description

technical field [0001] The invention relates to a radiation temperature measurement method and an infrared thermal imaging temperature measurement method, in particular to a method for measuring the influence of background factors on infrared temperature measurement. Background technique [0002] All objects with a temperature higher than absolute zero in nature emit infrared radiation. Infrared temperature measurement is to measure the temperature of an object by receiving the radiant energy emitted by the object. The previous data are qualitatively indicating that the external background environment has an impact on infrared temperature measurement, because the actual temperature measurement, the object is in a certain background environment, so the radiation caused by the background will inevitably affect the accuracy of temperature measurement after entering the infrared temperature measurement instrument sex. If the influence of the background on the infrared temperatu...

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Application Information

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IPC IPC(8): G01J5/00
Inventor 陈乐陈亮孙坚富雅琼吴娟郑恩辉杭庆彪
Owner CHINA JILIANG UNIV
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