Faculty

Research Group Thermography & Non Destructive Testing

Our Research Group of Thermography & NDT was founded 2006 at the University of Applied Sciences Upper Austria. We are dealing with emerging technologies in Non-Destructive Testing, which are recently in a process of development and optimization for industrial applications. The main research topics in our group are:

  • Active and Passive Thermography
  • Digital Shearography
  • Infrared and Raman Spectroscopy

In adition to these experimental methods we are engaged in analytical modelling (Green’s functions, Integral Transforms) and numerical simulations (Finite-Difference-, Finite-Element Methods) in order to improve the defect identification algorithms by taking the physical reality into account. In the course of the research activities 10 journal papers, 55 papers in conference proceedings, 1 PhD thesis and 10 master thesis have been published.

We see our activities at the interface between science and industrial applications. The main pillar of our research is the systematic improvement and development of these methods as well as the increase of their application range. In addition we are open for short-term feasibility studies on request at any time.


2018
H. Plasser, G. Mayr, G. Thummerer, G. Hendorfer, P. Burgholzer - Virtual wave concept for thermographic thickness estimation in carbon fiber reinforced plastics - INTERNATIONAL SCHOOL OF QUANTUM ELECTRONICS 62nd Course (2018), Erice, Erice, Italy, 2018 more
2018
P. Burgholzer, G. Stockner, G. Mayr - Acoustic Reconstruction for Photothermal Imaging - Bioengineering, Vol. 5, No. 70, 2018, pp. 9 more
2018
G. Stockner, G. Mayr, P. Burgholzer, G. Hendorfer - Image reconstruction on pulsed thermography data using the virtual wave concept - INTERNATIONAL SCHOOL OF QUANTUM ELECTRONICS 62nd Course (2018), Erice, Erice, Italy, 2018 more
2018
G. Mayr, G. Stockner, H. Plasser, G. Hendorfer, P. Burgholzer - Parameter estimation from pulsed thermography data using the virtual wave concept - NDT & E INTERNATIONAL, 2018, pp. 101-107 more
2018
C. Maierhofer, N. Rothbart, M. Goldammer, F. Hohlstein, J. Koch, I. Kryukov, G. Mahler, B. Stotter, G. Walle, B. Oswald-Tranta, M. Sengebusch - A round robin test of flash thermography – detectability and quantification of artificial and natural defects in CFRP and metal structures - A round robin… more
2018
G. Stockner, G. Mayr, P. Burgholzer, G. Hendorfer - Three-dimensional thermographic reconstruction of embedded heat sources by means of virtual waves - QIRT 2018 (Berlin), Berlin, Germany, Germany, 2018 more
2017
G. Mayr, K. Greßlehner, G. Hendorfer - Non-destructive testing procedure for porosity determination in carbon fibre reinforced plastics using pulsed thermography - Quantitative InfraRed Thermography Journal, Vol. 14, No. 2, 2017, pp. 263-274 more
2017
P. Burgholzer, M. Thor, J. Gruber, G. Mayr - Three-dimensional thermographic imaging using a virtual wave concept - JOURNAL OF APPLIED PHYSICS, Vol. 121, No. 10, 2017, pp. 11 more
2017
P. Burgholzer, T. Berer, J. Gruber, G. Mayr - Super-resolution thermographic imaging using blind structured illumination - Applied Physics Letters, 2017, pp. 5 more
2017
P. Burgholzer, G. Mayr, J. Gruber - Drei-dimensionale thermographische Rekonstruktion mittels virtueller Schallwellen - Proceedings Thermographie-Kolloquium 2017, Berlin, Germany, 2017, pp. 9 more
2016
G. Mayr, K. Greßlehner, G. Hendorfer - Non-destructive testing procedure for porosity determination in carbon fibre reinforced plastics using pulsed thermography - QIRT Open-Archives, Danzig, Poland, 2016 more
2016
S. Breitwieser, K. Greßlehner, B. Plank, G. Hendorfer - Failure detection in commercial thermoelectric modules using infrared thermography - Conference Book of Austrian Physical Society (ÖPG-Meeting 2016), Vienna, Austria, 2016, pp. 261-262 more
2016
G. Mayr - Characterization of porous carbon fiber reinforced polymer composites using optical excited pulse thermography - Phd Thesis, Johannes Kepler Universität, Austria, 2016, pp. 163 more
2016
J. Gruber, K. Greßlehner, G. Mayr, G. Hendorfer - Thermal diffusivity measurements on porous carbon fiber reinforced polymer tubes - AIP Conference Proceedings 1806, Atlanta, United States of America, 2016, pp. 10 more
2016
S. Breitwieser, K. Greßlehner, B. Plank, G. Hendorfer - Failure detection in commercial thermoelectric modules using infrared thermography - Proceedings of 6th World Sustainable Energy Forum (WSEF2016), Vienna, Austria, 2016, pp. 9 more
2016
N. Rothbart, C. Maierhofer, M. Goldammer, F. Hohlstein, J. Koch, I. Kryukov, G. Mahler, B. Stotter, G. Walle, B. Oswald-Tranta, M. Sengebusch - A round robin test on flash thermography - 19th World Conference on Non-Destructive Testing, WCNDT 2016 , München, Germany, 2016, pp. 8 more
2015
G. Mayr, G. Hendorfer, J. Sekelja, B. Plank - Quantitative Bestimmung der Porosität in kohlefaserverstärkte Polymerverbundwerkstoffe mittels Pulsthermographie - Tagungsband des Thermographie-Kolloquium, Leinfelden-Echterdingen, Germany, Germany, 2015 more
2015
J. Gruber, K. Greßlehner, J. Sekelja, G. Mayr - Reliability Study of Active Thermography for the Evaluation of Composites by use of Probability Of Detection Study - Tagungsband Thermographie-Kolloquium 2015, Leinfelden-Echterdingen, Germany, Germany, 2015, pp. 10 more
2015
N. Rothbart, C. Maierhofer, M. Goldammer, F. Hohlstein, J. Koch, I. Kryukov, G. Mahler, B. Stotter, G. Walle, M. Osl, M. Sengebusch - A ROUND ROBIN TEST OF FLASH THERMOGRAPHY OF CFRP and metal STRUCTURES - Proceedings 7th International Symposium for NDT in Aerospace, Bremen, Germany, 2015, pp. 8 more
2015
N. Rothbart, C. Maierhofer, M. Röllig, M. Sengebusch, M. Goldammer, F. Hohlstein, J. Koch, I. Kryukov, G. Mahler, B. Stotter, G. Walle - Ringversuche zur Blitzthermografie - Tagungsband Thermographie-Kolloquium 2015, Leinfelden-Echterdingen, Germany, Germany, 2015, pp. 1-8 more
2015
G. Mayr, B. Plank, J. Gruber, J. Sekelja, G. Hendorfer - Quantitative evaluation of the effective thermal diffusivity for model-based porosity prediction in CFRP - Quantitative InfraRed Thermography Journal, Vol. 13, No. 1, 2015, pp. 70-82 more
2014
J. Gruber, K. Gresslehner, J. Sekelja, G. Mayr, G. Hendorfer - Signal to Noise Ratio Threshold in Active Thermography - Proceedings 6th International symposium for NDT in Aerospace, Madrid, Spain, 2014, pp. 8 more
2014
B. Stotter, K. Gresslehner, G. Mayr, G. Hendorfer, J. Sekelja - Quantitative application of pulse phase thermography to determine material parameters - Proceedings of 12th Quantitative InfraRed Thermography Conference, Bordeaux, France, 2014 more
2014
G. Mayr, B. Plank, J. Gruber, J. Sekelja, G. Hendorfer - Thermal diffusivity measurements of porous CFRP specimens with different number of plies using pulsed thermography in transmission and reflection mode - Proceedings of 12th Quantitative InfraRed Thermography Conference, Bordeaux, France, 2014,… more
2013
B. Stotter, K. Gresslehner, G. Mayr, G. Hendorfer, J. Sekelja - Estimation of Material Parameters from Pulse Phase Thermography Data - AIP Conference Proceedings, Baltimore, United States of America, 2013 more
2013
J. Suchan, J. Sekelja, K. Gresslehner, G. Hendorfer, G. Mayr - 3D Modellierung der Pulsthermographie an porösen kohlenstofffaserverstärkten Kunststoffen - Thermographie-Kolloquium Berichtsband, Stuttgart, Germany, 2013 more
2013
G. Mayr, G. Hendorfer, K. Gresslehner, J. Suchan, J. Sekelja - Anwendung der Homogenisierungstheorie bei der quantitativen Prüfung von porösen kohlenstofffaserverstärkten Kunststoffen mit Pulsthermographie - Thermographie-Kolloquium Berichtsband, Stuttgart, Germany, 2013 more
2012
G. Mayr, G. Hendorfer, B. Plank, J. Sekelja - Porosity determination in CFRP by means of pulsed thermography combined with effective thermal diffusivity models - American Institute of Physics Conference Proceedings Vol. 1511, Denver / Colorado, Austria, 2012, pp. 8 more
2012
J. Gruber, B. Stotter, G. Mayr, G. Hendorfer - Prospects of Pulse Phase Thermography for Finding Disbonds in CFRP-Sandwich Parts with Aluminum Honeycomb Cores Compared to Ultrasonic - American Institute of Physics Conference Proceedings Vol. 1511, Denver / Colorado, Austria, 2012, pp. 547-554 more
2011
J. Gruber, G. Mayr, G. Hendorfer - Prospects and Limitations of Digital Shearography and Active Thermography in Finding and Rating Flaws in CFRP Sandwich Parts with Honeycomb Core - American Institute of Physics Conference Proceedings, Vol. 1430, Burlington / Vermont, United States of America, 2011,… more
2011
G. Mayr, G. Hendorfer, J. Gruber - Comparative study of pulsed thermography and ultrasonic testing for porous carbon fibre reinforced polymers - Advances in Polymer Science and Technology Two, Linz, Austria, 2011 more
2011
G. Mayr, B. Plank, J. Sekelja, G. Hendorfer - Active thermography as a quantitative method for non-destructive evaluation of porous carbon fiber reinforced polymers - NDT & E INTERNATIONAL, Vol. 44, No. 7, 2011, pp. 537-543 more
2011
G. Mayr, J. Gruber, G. Hendorfer - Analytical and numerical computations of heat transfer in pulsed thermography applied to porous CFRP - Review of Progress in Quantitative Nondestructive Evaluation, Burlington, VT, United States of America, 2011, pp. 1025-1032 more
2010
G. Zauner, G. Mayr, G. Hendorfer - Subsurface Defect Characterization in Pulsed Thermography by Means of Wavelet Analysis - 2nd Int. Symposium on NDT in Aerospace, Hamburg, D, Germany, 2010 more
2010
A. Gleiter, G. Mayr - Thermal wave interference - INFRARED PHYSICS & TECHNOLOGY, Vol. 53, No. 4, 2010, pp. 288-291 more
2010
G. Mayr, G. Hendorfer - Porosity Determination by Pulsed Thermography in Reflection Mode - Proceedings of QIRT 2010, Quebec, Canada, 2010, pp. 933-940 more
2010
B. Plank, J. Sekelja, G. Mayr, J. Kastner - Porositydetermination in aeronautic industry with x-ray computed tomography - Proceedings Industrial Computed Tomography Symposium 2010, Wels, Austria, 2010, pp. 25-34 more
2010
G. Mayr, G. Hendorfer - Characterization of defects in curved carbon fiber reinforced plastics using pulsed thermography - Quantitative InfraRed Thermography Journal, Vol. 7, No. 1, 2010, pp. 3-16 more
2009
A. Gleiter, G. Mayr - Interferenz thermischer Wellen - Tagungsband des Thermographie Kolloquiums, Stuttgart, Germany, 2009, pp. 8 more
2009
G. Zauner, G. Mayr, G. Hendorfer - Comparative defect evaluation of aircraft components by active thermography - Proceedings of SPIE Machine Vision Applications Volume 7251, San Jose / USA, United States of America, 2009, pp. 8 more
2009
P. Burgholzer, F. Camacho-Gonzales, D. Sponseiler, G. Mayr, G. Hendorfer - Information changes and time reversal for diffusion-related periodic fields - Progress in biomedical optics and imaging, San Jose, United States of America, 2009, pp. 10 more
2009
G. Zauner, G. Mayr, G. Hendorfer - Wavelet based subsurface defect characterization in pulsed phase thermography for non-destructive evaluation - Proceedings of SPIE - Wavelet Applications Volume 7248, San Jose / USA, United States of America, 2009, pp. 8 more
2008
G. Hendorfer, G. Mayr - Active Thermography for Quantitative Analysis of Defects in Composites - International Symposium on NDT in Aerospace, Fürth, Germany, 2008, pp. 67-76 more
2008
G. Hendorfer, C. Reiter, G. Mayr - Size and depth determination of defects in plastic materials, especially in CFRP, by means of shearography - American Institute of Physics Conference Proceedings, Vol. 975, Chicago, United States of America, 2008 more
2008
G. Mayr, G. Hendorfer, F. Puchberger, B. Harrer, B. Dietermayr - Schnelle und zerstörungsfreie Werkstoffprüfung bei Metallen durch Anwendung der Induktionsthermographie - Tagungsband des 2. Forschungsforums der österreichischen Fachhochschulen, Wels, Austria, 2008, pp. 347-353 more
2008
G. Mayr, B. Dietermayr, G. Hendorfer, J. Sekelja - Characterization of Defects in Curved CFRP Samples using Pulsed Thermography and 3D Finite Element Simulation - Proceedings of 9th International Conference on Quantitative Infrared Thermography, Krakau, Poland, 2008, pp. 447-454 more
2008
G. Hendorfer, G. Mayr, F. Puchberger, B. Harrer - Thermographische Untersuchungen an metallischen Proben in Kombination mit induktiver Erwärmung - Industrielles Symposium Mechatronik 2008, Linz, Austria, 2008, pp. 47-57 more
2007
G. Mayr, G. Hendorfer, G. Zauner, F. Puchberger - A fast and robust method for determining thermal diffusivity images in complex geometries - Proceedings of the 4th International Conference of Emerging Technologies in Non-destructive Testing, Stuttgart, Germany, 2007, pp. 179-185 more
2007
G. Hendorfer, G. Mayr, G. Zauner, T. Nömaier, F. Puchberger - Thermal diffusivity as a probe for material properties and defect characterization - Thermo 2007, Budapest, Hungary, 2007, pp. 10 more
2007
G. Mayr, G. Hendorfer, G. Zauner - Zerstörungsfreie Werkstoffprüfung auf Basis der Aktiven Thermographie - Tagungsband des ersten Forschungsforum der österreichischen Fachhochschulen, Fachhochschule Salzburg, Campus Urstein, Austria, 2007, pp. 251-257 more
2007
G. Hendorfer, G. Mayr, E. Schlotthauer - Pulsed Thermography applied to Components with Complex Shape - American Institute of Physics Conference Proceedings, Vol. 1340, Golden, CO, United States of America, 2007, pp. 950-957 more
2006
G. Zauner, G. Mayr, G. Hendorfer - Application of wavelet analysis in active thermography for non-destructive testing of CFRP composites - Wavelet Applications in Industrial Processing IV, Boston, United States of America, 2006, pp. 12 more
2006
G. Hendorfer, G. Mayr, G. Zauner, M. Haslhofer, R. Pree - Quantitative Determination of Porosity by Active Thermography - American Institute of Physics Conference Proceedings, Vol.894, Portland/ Oregon, United States of America, 2006, pp. 702-708 more
2006
G. Mayr, G. Zauner, G. Hendorfer, M. Haslhofer, R. Pree - Active thermography and shearography - Proceedings of optical sensors in the production field, Regensburg, Germany, 2006, pp. 117-123 more
2006
G. Mayr, G. Zauner, G. Hendorfer - Nondestructive testing of CFRP aerospace components - Proceedings of Aeronautics Days 2006, Wien, Austria, 2006, pp. 8 more
2018
The main objective of the Josef Ressel Center (JRC) is the improvement of thermal NDE in terms of detection and identification of defects in composites during the manufacturing and in-service applications.… more
2018
The “NDTonAIR” consortium involves Universities, Research Organisations and major European companies working on new Non-Destructive Testing (NDT) and Structural Health Monitoring (SHM) techniques… more
2015
The aim of the project is the development of a generally valid "inspection skill" for robots or multi-axis handling systems. In this way, inspection tasks in production are implemented flexibly… more
2015
The aim of the research project is to test innovative 3D braided-winding technology components with Active Thermography in an automated and non-destructive way and additionally detected defects should… more
2014
The goal of this research project is to develop thermographic methods to enable a 3D reconstruction of flaws in aircraft structures. Due to the availability of a quantitative and non-destructive inspection… more