Schweikert, Kai ; Sielaff, Axel ; Stephan, Peter (2021)
Pixel-wise in situ calibration method for high accuracy infrared thermography of moving targets.
In: Infrared Physics & Technology
doi: 10.1016/j.infrared.2021.103862
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present a calibration method for the measurement of temperature using infrared cameras that enables high-accuracy thermography of moving targets with locally varying emissivity. Correlation-based image matching techniques are applied to calculate position-dependent calibration functions with sub-pixel accuracy. The calibration method is described in detail and demonstrated using an experimental setup consisting of a rotating cube. The measurement uncertainty is analysed in comparison to a conventional pixel-wise in situ method used for non-moving measurements. An analysis is carried out for varying levels of sub-pixel resolution and within different regions of the field of view. The results show that the measurement uncertainty decreases with increasing sub-pixel resolution and is comparable to levels obtained with a pixel-wise in situ calibration applied on a non-moving target. The error introduced by the motion of the sample was reduced by 75 on a high emissivity surface and by 96 within an area of the field of view, which experienced significant emissivity changes due to the motion of the sample.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Schweikert, Kai ; Sielaff, Axel ; Stephan, Peter |
| Art des Eintrags: | Bibliographie |
| Titel: | Pixel-wise in situ calibration method for high accuracy infrared thermography of moving targets |
| Sprache: | Englisch |
| Publikationsjahr: | 10 August 2021 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Infrared Physics & Technology |
| DOI: | 10.1016/j.infrared.2021.103862 |
| URL / URN: | https://www.sciencedirect.com/science/article/pii/S135044952... |
| Kurzbeschreibung (Abstract): | We present a calibration method for the measurement of temperature using infrared cameras that enables high-accuracy thermography of moving targets with locally varying emissivity. Correlation-based image matching techniques are applied to calculate position-dependent calibration functions with sub-pixel accuracy. The calibration method is described in detail and demonstrated using an experimental setup consisting of a rotating cube. The measurement uncertainty is analysed in comparison to a conventional pixel-wise in situ method used for non-moving measurements. An analysis is carried out for varying levels of sub-pixel resolution and within different regions of the field of view. The results show that the measurement uncertainty decreases with increasing sub-pixel resolution and is comparable to levels obtained with a pixel-wise in situ calibration applied on a non-moving target. The error introduced by the motion of the sample was reduced by 75 on a high emissivity surface and by 96 within an area of the field of view, which experienced significant emissivity changes due to the motion of the sample. |
| Freie Schlagworte: | infrared thermography, thermal imaging, calibration, in situ, moving object |
| Zusätzliche Informationen: | Art.No.: 103862 |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Technische Thermodynamik (TTD) DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen > Projektbereich A: Generische Experimente DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen > Projektbereich A: Generische Experimente > A01: Erzwungene Be- und Entnetzung komplexer Oberflächen - Leitkonfiguaration Eintauchkörper |
| Hinterlegungsdatum: | 20 Aug 2021 09:47 |
| Letzte Änderung: | 30 Nov 2023 09:11 |
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