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Geometric Calibration for Thermography Cameras

Schmidt, Thomas und Frommel, Christoph (2015) Geometric Calibration for Thermography Cameras. In: DGZfP-Proceedings BB 156 (156). DGZfP. 7th International Symposium on NDT in Aerospace 2015, 2015-11-16 - 2015-11-18, Bremen. ISBN 987-3-940283-76-4.

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Kurzfassung

The application of active thermography applied as Lock-in or pulse thermography has been widely used in aerospace industry. Over the last years a number of activities had been undertaken to achieve a higher level of automation. Industrial robots are very versatile and allow a comparably easy integration of a measurement system in robotic workcell further the control unit. It is therefore possible to cover a large range of geometrical complex parts even on larger dimensions. The robot can be used for the positioning of the thermography camera and delivers the location of the robot flange coordinate system at the time of measurement automatically. In principle thermography cameras used in NDT applications as well as other fields can be handled as standard photogrammetric cameras. According to the longer wavelengths of the measured spectrum the lenses of thermography cameras are made of Germanium. Although the high cost for these lenses, they are optimized for radiometric resolution, thus geometric precision or minimal distortion are of minor interest. The approach at DLR Augsburg of a robot based measuring system for industrial thermography applications and a hand-eye-calibration procedure for a thermography end-effector has been presented in previous papers. In order to achieve higher accuracy in terms of geometric precision a number of distortion parameters have been evaluated. An automated procedure has been developed to compare different calibration strategies. Within this paper DLR-Center for Lightweight-Production-Technology in Augsburg will give insight into current work in the area of geometric calibration for thermography cameras for a high resolution camera and results derived from experiments.

elib-URL des Eintrags:https://elib.dlr.de/101534/
Dokumentart:Konferenzbeitrag (Vortrag, Anderer)
Titel:Geometric Calibration for Thermography Cameras
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schmidt, Thomast.schmidt (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Frommel, Christophchristoph.frommel (at) dlr.dehttps://orcid.org/0000-0002-3717-1087NICHT SPEZIFIZIERT
Datum:November 2015
Erschienen in:DGZfP-Proceedings BB 156
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Verlag:DGZfP
ISBN:987-3-940283-76-4
Status:veröffentlicht
Stichwörter:Thermographie, Kamera, geometrische Kalibration, Thermography, Camera, geometric Calibration
Veranstaltungstitel:7th International Symposium on NDT in Aerospace 2015
Veranstaltungsort:Bremen
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:16 November 2015
Veranstaltungsende:18 November 2015
Veranstalter :DGZfP, FhG
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen und Werkstoffe (alt)
Standort: Augsburg
Institute & Einrichtungen:Institut für Bauweisen und Strukturtechnologie > Automatisierung und Qualitätssicherung in der Produktionstechnologie
Hinterlegt von: Schmidt, Thomas
Hinterlegt am:14 Jan 2016 09:27
Letzte Änderung:24 Apr 2024 20:07

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