| Author | Title | Year | Journal/Proceedings | DOI/URL | |
|---|---|---|---|---|---|
| Bonow, G., Cramar, L., Hegenberg, J., Kroll, A., Müller, A.O., Schmidt, L. & Soldan, S. | Mensch-Roboter-Interaktion und Mess-/Inspektionsstrategie [BibTeX] |
2013 | , Universität Kassel , Schlussbericht zum Forschungsprojekt | RP1 | |
BibTeX:
@techreport{Robogas01MA09023A,
author = {Gero Bonow and Liubov Cramar and Jens Hegenberg and Andreas Kroll and Antonio Ordonez Müller and Ludger Schmidt and Samuel Soldan}
, title = {Mensch-Roboter-Interaktion und Mess-/Inspektionsstrategie}
, type = {Schlussbericht zum Forschungsprojekt}
, year = {2013}
, address = {Universität Kassel}
, mrtnr = {RP1} }
|
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| Hegenberg, J., Herrmann, R., Ziegner, D., Schmidt, L., Guenther, T., Müller, A.O., Kroll, A., Barz, T. & Schulz, D. | Forschungsprojekt RobotAir: Praxistaugliches Boden-Luft-Servicerobotersystem für die Inspektion industrieller Druckluftversorgung und die Verbesserung der Arbeitsumgebungsfaktoren [BibTeX] |
2015 | Technische Sicherheit , Vol. 5 (5) , pp. 16-22 , Mai | ||
BibTeX:
@article{Hegenberg2015,
author = {Hegenberg, J. and Herrmann, R. and Ziegner, D. and Schmidt, L. and Guenther, T. and Müller, A. O. and Kroll, A. and Barz, T. and Schulz, D.}
, title = {Forschungsprojekt RobotAir: Praxistaugliches Boden-Luft-Servicerobotersystem für die Inspektion industrieller Druckluftversorgung und die Verbesserung der Arbeitsumgebungsfaktoren}
, journal = {Technische Sicherheit}
, year = {2015}
, volume = {5}
, number = {5}
, pages = {16-22}
}
|
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| Heinze, S., Graube, M., Schegner, L., Arnu, D., Klinkenberg, R., Schmidt, A., Atzmüller, M., Klöpper, B., Dix, M., Hollender, M., Chioua, M., Al Mawla, H., Rehmer, A., Kroll, A., Stumme, G. & Urbas, L. | Big Data in der Prozessindustrie: Frühzeitige Erkennung und Entscheidungsunterstützung [BibTeX] |
2017 | Automation 2017 , VDI , Baden-Baden , 27.-28. Juni , VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA) , online | URL | |
BibTeX:
@inproceedings{HeinzeAutomation2017,
author = {S. Heinze and M. Graube and L. Schegner and D. Arnu and R. Klinkenberg and A. Schmidt and M. Atzmüller and B. Klöpper and M. Dix and M. Hollender and M. Chioua and H. Al Mawla and A. Rehmer and A. Kroll and G. Stumme and L. Urbas}
, title = {Big Data in der Prozessindustrie: Frühzeitige Erkennung und Entscheidungsunterstützung}
, booktitle = {Automation 2017}
, publisher = {VDI}
, year = {2017}
, address = {Baden-Baden}
, url = {http://www.automatisierungskongress.de/}
}
|
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| Kroll, A. & Ordonez Müller, A. | Verfahren und Vorrichtung zum Erzeugen eines 3D-Thermogramms [BibTeX] |
2017 | (DE 10 2017 1008 85 A1) , Universität Kassel , Patent , Deutsches Patent DE 10 2017 1008 85 A1 | URL | |
BibTeX:
@misc{DPatent2017,
author = {Kroll, Andreas and Ordonez Müller, Antonio}
, title = {Verfahren und Vorrichtung zum Erzeugen eines 3D-Thermogramms}
, type = {Patent}
, year = {2017}
, number = {DE 10 2017 1008 85 A1}
, address = {Universität Kassel}
, note = {Deutsches Patent DE 10 2017 1008 85 A1}
, url = {https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=1&ND=3&adjacent=true&locale=en_EP&FT=D&date=20180719&CC=DE&NR=102017100885A1&KC=A1}
}
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| Ordonez Müller, A. & Kroll, A. | Generating High Fidelity 3D Thermograms with a Handheld Real-time Thermal Imaging System | 2017 | IEEE Sensors Journal , Vol. 17 (3) , pp. 774-783 , February | DOI URL | |
| Abstract: Infrared thermography is a widely used technique to measure and portray the surface temperature of an object in form of thermal images. Two dimensional images, however, have some inherent limitations with regard to the fidelity with which they can depict the surface temperature of a three dimensional object. In the past two decades, there have been several works describing different techniques to generate 3D models textured with thermal information using various combinations of sensors in order to address some of these limitations. Most of these approaches generate 3D thermograms of an object from a single perspective with bulky measurement systems and therefore do not address problems that arise when scanning objects in a continuous manner from multiple perspectives. But reductions in cost, size and weight of infrared and depth-sensing cameras as well as a significant increase in computational power of personal computers have enabled the development of low cost, handheld, real-time 3D thermal imaging systems. This article elaborates through a series of experiments on the main factors that affect the real-time generation of high fidelity 3D thermograms with such a system and demonstrates how taking this factors into consideration significantly improves the appearance and fidelity of the generated 3D thermogram. Most of the insight gained in this article can be transferred to 3D thermal imaging systems based on other combination of sensors. | |||||
BibTeX:
@article{ordonezmuller_2016,
author = {Ordonez Müller, Antonio and Kroll, A.}
, title = {Generating High Fidelity 3D Thermograms with a Handheld Real-time Thermal Imaging System}
, journal = {IEEE Sensors Journal}
, year = {2017}
, volume = {17}
, number = {3}
, pages = {774-783}
, url = {http://ieeexplore.ieee.org/document/7676356/}
, doi = {http://dx.doi.org/10.1109/JSEN.2016.2621166}
}
|
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| Ordonez Müller, A. & Kroll, A. | On the Temperature Assignment Problem and the Use of Confidence Textures in the Creation of 3D Thermograms | 2015 | 9th International Conference on Sensing Technology (ICST 2015) , pp. 235-240 , Auckland, New Zealand , December 8. - 10. | URL | |
| Abstract: In infrared thermography, the temperature measured by a thermal imaging device varies with the position and orientation of the camera with respect to an object's surface. 3D thermography has hence the potential to depict the surface temperature of objects with higher fidelity than conventional 2D thermography. So far the problem of assigning temperature values that correspond to the same surface but were obtained from different perspectives has been addressed by simply overwriting previous values with new values or by averaging the measured values according to a weighted averaging scheme. A new approach to map temperature values onto a 3D model is proposed that results in a more faithful representation of an object's real surface temperature in form of a 3D thermogram. Temperature values are assigned in real time to the 3D model taking into consideration the observation conditions under which they were measured. These conditions are also made available to the user in form of textured 3D models, where the texture color depicts the level of confidence associated to the thermal measurements. These textures provide useful additional information about the 3D thermogram. The new approach is especially helpful in the real-time generation of 3D thermograms as the user gets live feedback on the quality of the thermal model being generated. | |||||
BibTeX:
@inproceedings{ordonezmuller_2015,
author = {Ordonez Müller, Antonio and Kroll, A.}
, title = {On the Temperature Assignment Problem and the Use of Confidence Textures in the Creation of 3D Thermograms}
, booktitle = {9th International Conference on Sensing Technology (ICST 2015)}
, year = {2015}
, pages = {235-240}
, address = {Auckland, New Zealand}
, url = {http://seat.massey.ac.nz/conferences/icst2015/}
}
|
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| Ordonez Müller, A. & Kroll, A. | On the use of Cooperative Autonomous Mobile Robots and Optical Remote Sensing in Inspection Robotics [BibTeX] |
2014 | Automation 2014 , Baden-Baden, Germany , July 1. - 2. | URL | |
BibTeX:
@inproceedings{ordonezmuller_2014,
author = {Ordonez Müller, Antonio and Kroll, A.}
, title = {On the use of Cooperative Autonomous Mobile Robots and Optical Remote Sensing in Inspection Robotics}
, booktitle = {Automation 2014}
, year = {2014}
, address = {Baden-Baden, Germany}
, url = {http://www.automatisierungskongress.de/}
}
|
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| Ordonez Müller, A. & Kroll, A. | On Range Extension of Tunable Diode Laser Absorption Spectroscopy (TDLAS) Based Devices in Remote Gas Sensing Applications | 2013 | International Symposium on Olfaction and Electronic Nose -- ISOEN 2013 , EXCO, Daegu, Korea , July 2-5 | URL | |
| Abstract: Uncontrolled emissions of harmful gases pose a real threat to human safety and the environment. A cost effective way to effectively monitor the presence of such gases in large environments like industrial plants is highly desirable. This paper discusses the issues that arise when using retro-reflectors to extend the operating range of a commercial device that utilizes Tunable Diode Laser Absorption Spectroscopy (TDLAS) for remote gas sensing. | |||||
BibTeX:
@inproceedings{ordonezmuller_2013a,
author = {Ordonez Müller, Antonio and Kroll, A.}
, title = {On Range Extension of Tunable Diode Laser Absorption Spectroscopy (TDLAS) Based Devices in Remote Gas Sensing Applications}
, booktitle = {International Symposium on Olfaction and Electronic Nose -- ISOEN 2013}
, year = {2013}
, address = {EXCO, Daegu, Korea}
, url = {https://www.olfactionsociety.org/event/isoen-2013}
}
|
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| Ordonez Müller, A. & Kroll, A. | Effects of beam divergence in hand-held TDLAS sensors on long distance gas concentration measurements | 2013 | International Workshop on Advanced Infrared Technology and Applications - AITA 2013 , Vol. 12 , pp. 9-13 , Turin, Italy , Sept. 10-13 | URL | |
| Abstract: Early detection of gas leakages in petrochemical plants is of great concern due to their potential threat to human safety, the environment and the infrastructure. Hand-held devices based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology have proven to be an effective way to detect and locate such leaks. The theory behind these devices is well documented, but little information is available on the effects that laser beam divergence has on the ability to detect gas plumes at long distances. This contribution attempts to explain how the background reflectance and the laser intensity profile affect the concentration readings as the distance to the objects under inspection increases. | |||||
BibTeX:
@inproceedings{ordonezmuller_2013b,
author = {Ordonez Müller, Antonio and Kroll, A.}
, title = {Effects of beam divergence in hand-held TDLAS sensors on long distance gas concentration measurements}
, booktitle = {International Workshop on Advanced Infrared Technology and Applications - AITA 2013}
, year = {2013}
, volume = {12}
, pages = {9-13}
, address = {Turin, Italy}
, url = {http://ronchi.isti.cnr.it/AITA2013}
}
|
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| Ordoñez Müller, A.R. | Close range 3D thermography: real-time reconstruction of high fidelity 3D Thermograms | 2018 | Schriftenreihe Mess- und Regelungstechnik der Universität Kassel (7) , kassel university press , April , Dissertation | URL PhD-9 | |
| Abstract: Infrared thermography is a powerful technique that enables the non-contact measurement of an object's surface temperature and presents the results in form of thermal images. The analysis of these images provides valuable information about an object's thermal behavior and allows in many cases the diagnostic of abnormal conditions. However, the fidelity with which thermal images depict the temperature distribution of an object's surface is limited because the position of the camera with respect to the surface affects the accuracy of the measurements. 3D thermography offers the possibility to overcome this and other limitations that affect conventional 2D thermography but most 3D thermographic systems developed so far generate 3D thermograms from a single perspective or from few noncontiguous points of view and do not operate in real time. As a result, the 3D thermograms they generate do not offer much advantage over conventional thermal images. But reductions in cost, size and weight of thermographic cameras, the recent introduction to the market of depth cameras that are also small, low-cost and light and the significant increase of computational power of commercial computers over the last years have unlocked the possibility to implement affordable handheld 3D thermal imaging systems that can be easily maneuvered around an object and that can generate high-fidelity 3D thermograms in real time. This thesis exploits these technological advancements and explores the multiple aspects involved in the real-time generation of high-fidelity 3D thermograms at close range using a handheld 3D thermal imaging system. It provides a structure for the knowledge accumulated in the field of 3D thermography, offers new insight into the radiometric, geometric and temporal calibration of the sensors and makes various contributions to improve the design of 3D thermographic systems, the fidelity of the 3D thermograms and the interaction with the user. In regards to the radiometric calibration, it shows through a series of original experiments how the thermal background radiation affects the accuracy of the temperature measurements and provides a plausible explanation for this poorly documented behavior. On the subject of geometric calibration, it presents and analyzes the results obtained with an improved calibration target and demonstrates that the orientation of the thermographic camera cannot be estimated with enough accuracy due of the poor spatial resolution of the thermal images and that manual fine-tuning may be necessary. Concerning the temporal calibration, this work provides a detailed analysis of the problem of assigning timestamps to the depth and thermal data. It also proposes a distinction between the concepts of data fusion and data validation where the former addresses the problem of determining which temperature measurements corresponds to which vertex on the 3D model and the latter addresses the problem of validating the measurement conditions before a temperature value is assigned to the corresponding vertex. In regards to sensor data fusion, it discusses the most effective approach to relate depth and thermal data and presents an effective method to reduce registration errors due to the parallax effect. In regards to data validation, it presents a new approach to determine when temperature values in the thermal texture of the 3D thermogram should be updated. Finally, this work shows that the use of shading and special color palettes helps improve the discernibility of features in renderings of 3D thermograms and proposes the use of additional textures to inform the user during the scan which parts of the model have been scanned under good measurement conditions and which need to be rescanned. | |||||
BibTeX:
@phdthesis{PhDMueller2018,
author = {Antonio Rafael Ordoñez Müller}
, title = {Close range 3D thermography: real-time reconstruction of high fidelity 3D Thermograms}
, publisher = {kassel university press}
, school = {Schriftenreihe Mess- und Regelungstechnik der Universität Kassel}
, type = {Dissertation}
, year = {2018}
, number = {7}
, url = {http://www.uni-kassel.de/upress/online/OpenAccess/978-3-7376-0624-0.OpenAccess.pdf}
, isbn = {978-3-7376-0624-0}
, mrtnr = {PhD-9} }
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