Correction of Signals in a Microbolometric Array Raising the Validity of the Measuring Object’s Temperature. Part 1

Noncontact methods of imaging temperature fields, based on the registration of thermal radiation, are widely used in the study and control of thermal processes in different branches of human activities. To reduce uncertainty in measuring temperature with digital infrared imaging equipment, it is nec...

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Bibliographic Details
Published in:Journal of engineering physics and thermophysics 2021-03, Vol.94 (2), p.272-285
Main Author: Firago, V. A.
Format: Article
Language:English
Subjects:
Algorithms
Arrays
Classical Mechanics
Complex Systems
Control surfaces
Digital imaging
Engineering
Engineering Thermodynamics
Heat and Mass Transfer
Heat Conduction and Heat Transfer in Technological Processes
Imaging systems
Industrial Chemistry/Chemical Engineering
Infrared imaging
Measurement
Radiation, Background
Signal processing
Temperature
Thermal imaging
Thermal radiation
Thermodynamics
Uncertainty
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Summary:Noncontact methods of imaging temperature fields, based on the registration of thermal radiation, are widely used in the study and control of thermal processes in different branches of human activities. To reduce uncertainty in measuring temperature with digital infrared imaging equipment, it is necessary to take into account a number of factors causing deviation of its readings from true values. In the paper, analysis is made of physical processes occurring in registration of thermal radiation by thermographs on the basis of microbolometric arrays and methods are proposed for correcting registered signals that make it possible to reduce uncertainty in measuring temperature using them. The first part of the paper is devoted to considering the design of LWIR-range microbolometric arrays and the required corrections of registered signals making it possible to correctly interpret the obtained thermal images in a broad range of measured temperatures. The second part of the paper is devoted to algorithms of processing produced thermal imaging signals, and also to methods of accounting for the coefficient of thermal radiation of controlled surfaces and for the environmental radiation reflected from them whose use makes it possible to improve the validity of temperature determination.
ISSN:1062-0125
1573-871X
DOI:10.1007/s10891-021-02300-1