Direct comparison of two pyrometers and a low-cost thermographic camera for time resolved LWIR temperature measurements

Krankenhagen, Rainer; Altenburg, Simon J.

doi:10.1117/12.2261074

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Fig 5: Difference Thermogram Of a Black Pvc Step Wedge Afte1

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2018

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“…Since there is no spectral overlap of the LED emission spectrum and the spectral sensitivity range of the MWIR camera oscillating reflections of the heating source can be neglected. More details can be found in [19]. The surface temperature was recorded by an MWIR camera with 200 Hz full frame rate, but reduced frame rates were used for low frequencies.…”

Section: Fig 5: Difference Thermogram Of a Black Pvc Step Wedge Aftementioning

confidence: 99%

Systematic errors in the evaluation of uncorrected data from thermographic lock-in measurements

Krankenhagen¹,

Ziegler²,

Maierhofer³

2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

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Lock-in thermography (LT) is based on the correct evaluation of phase differences between the temperature oscillations at different surface regions of the object under test during periodic heating. Since the usual heating procedures contain a DC component, the actual heating pattern achieved is not harmonic. This causes systematic deviations when phase differences are determined by means of harmonic analysis, e.g. with FFT analysis. The resulting errors depend clearly on the ratio between DC and AC amplitude, which is demonstrated at simulated and experimentally recorded temperature transients. Further experimental LT data obtained by different oscillating energy inputs showed a variety of possible shapes of transients with different DC components..

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Section: Fig 5: Difference Thermogram Of a Black Pvc Step Wedge Aftementioning

confidence: 99%

Systematic errors in the evaluation of uncorrected data from thermographic lock-in measurements

Krankenhagen¹,

Ziegler²,

Maierhofer³

2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

View full text Add to dashboard Cite

show abstract

Direct comparison of two pyrometers and a low-cost thermographic camera for time resolved LWIR temperature measurements

Cited by 1 publication

References 2 publications

Systematic errors in the evaluation of uncorrected data from thermographic lock-in measurements

Systematic errors in the evaluation of uncorrected data from thermographic lock-in measurements

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