A data processing algorithm for multispectral radiation thermometry based on multi-segment linear model and secondary inversion

•The optimization problem of multispectral radiation thermometry is constructed based on the multi-segment linear emissivity model, which has a unique least square solution.•According to the median for the value range of emissivity, the appropriate wavelengths used for establishing multi-segment lin...

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Published inMeasurement : journal of the International Measurement Confederation Vol. 201; p. 111753
Main Authors Zhang, Yucun, Zou, Zhou, Yan, Fang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 30.09.2022
Subjects
Online AccessGet full text
ISSN0263-2241
1873-412X
DOI10.1016/j.measurement.2022.111753

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Abstract •The optimization problem of multispectral radiation thermometry is constructed based on the multi-segment linear emissivity model, which has a unique least square solution.•According to the median for the value range of emissivity, the appropriate wavelengths used for establishing multi-segment linear emissivity model can be determined.•The problem of channel temperature inconsistency in the hypothetical model method of multispectral radiation thermometry is solved by the secondary inversion. Multispectral radiation thermometry is a branch of infrared temperature measurement technology with wide application in many industries. Although this technology has been developed for decades, there is still a problem in its data processing, that is, how to accurately solve the radiation equations without the information of object’s emissivity. The traditional fixed emissivity model method cannot adapt to all objects. Therefore, this study proposes a data processing algorithm for multispectral radiation thermometry based on multi-segment linear model and secondary inversion. The algorithm can automatically select the multi-segment linear model suitable for the measured object, and realize the accurate calculation of temperature and emissivity through the secondary inversion. The efficiency and accuracy of the algorithm are verified through simulations. The experimental results of temperature measurement of aviation alloy prove the effectiveness of this algorithm in practical application.
AbstractList •The optimization problem of multispectral radiation thermometry is constructed based on the multi-segment linear emissivity model, which has a unique least square solution.•According to the median for the value range of emissivity, the appropriate wavelengths used for establishing multi-segment linear emissivity model can be determined.•The problem of channel temperature inconsistency in the hypothetical model method of multispectral radiation thermometry is solved by the secondary inversion. Multispectral radiation thermometry is a branch of infrared temperature measurement technology with wide application in many industries. Although this technology has been developed for decades, there is still a problem in its data processing, that is, how to accurately solve the radiation equations without the information of object’s emissivity. The traditional fixed emissivity model method cannot adapt to all objects. Therefore, this study proposes a data processing algorithm for multispectral radiation thermometry based on multi-segment linear model and secondary inversion. The algorithm can automatically select the multi-segment linear model suitable for the measured object, and realize the accurate calculation of temperature and emissivity through the secondary inversion. The efficiency and accuracy of the algorithm are verified through simulations. The experimental results of temperature measurement of aviation alloy prove the effectiveness of this algorithm in practical application.
ArticleNumber 111753
Author Zou, Zhou
Yan, Fang
Zhang, Yucun
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Keywords Multispectral radiation thermometry
Emissivity
Linear model
Optimization
DFP
Language English
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Snippet •The optimization problem of multispectral radiation thermometry is constructed based on the multi-segment linear emissivity model, which has a unique least...
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SubjectTerms DFP
Emissivity
Linear model
Multispectral radiation thermometry
Optimization
Title A data processing algorithm for multispectral radiation thermometry based on multi-segment linear model and secondary inversion
URI https://dx.doi.org/10.1016/j.measurement.2022.111753
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