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Geometric Calibration in Active Thermography Applications

Schmidt, Thomas und Frommel, Christoph (2016) Geometric Calibration in Active Thermography Applications. 9th World Conference on Non-Destructive Testing (WCNDT 2016), 2016-06-13 - 2016-06-17, München, Deutschland.

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Kurzfassung

The application of active thermography such as Lock-in or pulse thermography has been widely used in aerospace and other industries. Over the last decade, the level of automation has increased by using various manipulators like classical NC machines or even industrial robots. Meanwhile integration of measurement systems and automated manipulators achieved industrial standard. It is therefore possible to cover a large range of geometrical complex parts even on larger dimensions. Manipulators like a 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. Or one can think of having a stationary camera and the part is moved around. 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 infrared spectrum the lenses of thermography cameras are mainly made of Germanium. Although the high cost for these lenses, they are optimized for radiometric resolution, thus geometric precision or minimal distortion had not been targeted especially in the field of NDT. The approach at DLR Augsburg of a robot based measuring system for industrial thermography applications in the context of CFRP production technology including 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 as well as different camera characteristics e.g. focal length. Within this paper DLR’s 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, results derived from experiments and applications for such calibration procedure.

elib-URL des Eintrags:https://elib.dlr.de/109592/
Dokumentart:Konferenzbeitrag (Anderer)
Zusätzliche Informationen:Paper für den Konferenzband
Titel:Geometric Calibration in Active Thermography Applications
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:2016
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Infrared Testing (IRT), Robotics Assisted NDE, Geometric Calibration
Veranstaltungstitel:9th World Conference on Non-Destructive Testing (WCNDT 2016)
Veranstaltungsort:München, Deutschland
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:13 Juni 2016
Veranstaltungsende:17 Juni 2016
Veranstalter :DGZfP
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: Frommel, Christoph
Hinterlegt am:19 Dez 2016 11:30
Letzte Änderung:24 Apr 2024 20:14

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