2020
DOI: 10.1016/j.ijheatmasstransfer.2020.120419
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A general procedure for infrared thermography heat transfer measurements in hypersonic wind tunnels

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Cited by 33 publications
(16 citation statements)
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“…In order to correctly assess temperature distribution on the housing of electronic components, it is necessary to take into account all factors that can influence the measurement [ 6 , 7 , 8 ]. The most important of them include the value of the emissivity coefficient ε [ 9 ], the reflected temperature ϑ r [ 10 ], the distance between the lens and the observed object d [ 11 ], the ambient temperature ϑ a [ 12 ], the temperature of the external optical system [ 13 ], the transmittance of the external optical system [ 14 , 15 ], the relative humidity ω [ 16 ], the viewing angle β [ 7 ], and the sharpness of the recorded thermogram [ 17 , 18 , 19 ]. An assessment of the influence of the abovementioned factors on the accuracy of the thermographic temperature measurement of small-sized electronic components is possible thanks to the use of a microscopic thermography stand.…”
Section: Introductionmentioning
confidence: 99%
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“…In order to correctly assess temperature distribution on the housing of electronic components, it is necessary to take into account all factors that can influence the measurement [ 6 , 7 , 8 ]. The most important of them include the value of the emissivity coefficient ε [ 9 ], the reflected temperature ϑ r [ 10 ], the distance between the lens and the observed object d [ 11 ], the ambient temperature ϑ a [ 12 ], the temperature of the external optical system [ 13 ], the transmittance of the external optical system [ 14 , 15 ], the relative humidity ω [ 16 ], the viewing angle β [ 7 ], and the sharpness of the recorded thermogram [ 17 , 18 , 19 ]. An assessment of the influence of the abovementioned factors on the accuracy of the thermographic temperature measurement of small-sized electronic components is possible thanks to the use of a microscopic thermography stand.…”
Section: Introductionmentioning
confidence: 99%
“…In the measurement, the value of ε should be chosen that is closest to ε of the real value of the observed surface [ 6 , 7 , 9 ]. The lower the accuracy with which ε is chosen, the lower the accuracy of the thermographic temperature measurement will be.…”
Section: Introductionmentioning
confidence: 99%
“…Additionally, the measurement result depends on a number of factors. The most important factors determining the value of the thermographic temperature measurement include: emissivity coefficient value [7], reflected temperature [8], distance between the thermographic camera lens and the surface under observation [9], ambient temperature [10], temperature of the external optical system [11], transmission of the external optical system [12], air humidity [13] and registered thermogram sharpness [14].…”
Section: Introductionmentioning
confidence: 99%
“…Apart from the components described in equations ( 2)-( 4), additional factors should be taken into account. In the case being analysed, equation ( 2) takes the form of equation ( 6) and equation (3) takes the form of equation (7). In addition, one should also take into account the IR radiation emitted by the IR window surface (8) and the IR radiation reflected from the IR The air transmittance value can be determined on the bases of formulas presented in [29,30].…”
mentioning
confidence: 99%
“…During the evaluation of the thermographic measurement uncertainty, the range of factors which affect the result of the thermographic measurement of the temperature should be determined. These factors are the value of the emission factor [9], the temperature of the reflection [10], the distance between the camera lens and the observed object [11], [12], the ambient temperature [13], the temperature of the external optical system [14], the transmission of the external optical system [15], [16], and relative humidity [17]. These are the factors whose contribution to the uncertainty budget can be easily determined on the basis of measurements or available literature [18], [19].…”
Section: Introductionmentioning
confidence: 99%