Details
| Original language | English |
|---|---|
| Title of host publication | Infrared Sensors, Devices, and Applications VII |
| Editors | Paul D. LeVan, Arvind I. D'Souza, Ashok K. Sood, Priyalal Wijewarnasuriya |
| Publisher | SPIE |
| Number of pages | 7 |
| ISBN (electronic) | 9781510612655 |
| Publication status | Published - 30 Aug 2017 |
| Event | Infrared Sensors, Devices, and Applications VII 2017 - San Diego, United States Duration: 9 Aug 2017 → 10 Aug 2017 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 10404 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
Increasing requirements concerning the quality and lifetime of machine components in industrial and automotive applications require comprehensive investigations of the components in conditions close to the application. Irregularities in heating of mechanical parts reveal regions with increased loading of pressure, draft or friction. In the long run this leads to damage and total failure of the machine. Thermographic measurements of rotating objects, e.g., rolling bearings, brakes, and clutches provide an approach to investigate those defects. However, it is challenging to measure fast-rotating objects accurately. Currently one contact-free approach is performing stroboscopic measurements using an infrared sensor. The data acquisition is triggered so that the image is taken once per revolution. This leads to a huge loss of information on the majority of the movement and to motion blur. The objective of this research is showing the potential of using an optomechanical image derotator together with a thermographic camera. The derotator follows the rotation of the measurement object so that quasi-stationary thermal images during motion can be acquired by the infrared sensor. Unlike conventional derotators which use a glass prism to achieve this effect, the derotator within this work is equipped with a sophisticated reflector assembly. These reflectors are made of aluminum to transfer infrared radiation emitted by the rotating object. Because of the resulting stationary thermal image, the operation can be monitored continuously even for fast-rotating objects. The field of view can also be set to a small off-axis region of interest which then can be investigated with higher resolution or frame rate. To depict the potential of this approach, thermographic measurements on a rolling bearings in different operating states are presented.
Keywords
- Infrared imaging, Optomechanical image derotator, Rolling bearings, Rotating machinery, Temperature measurements
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
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Infrared Sensors, Devices, and Applications VII. ed. / Paul D. LeVan; Arvind I. D'Souza; Ashok K. Sood; Priyalal Wijewarnasuriya. SPIE, 2017. 104040P (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10404).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Temperature measurements on fast-rotating objects using a thermographic camera with an optomechanical image derotator
AU - Altmann, Bettina
AU - Pape, Christian
AU - Reithmeier, Eduard
N1 - Publisher Copyright: © 2017 SPIE.
PY - 2017/8/30
Y1 - 2017/8/30
N2 - Increasing requirements concerning the quality and lifetime of machine components in industrial and automotive applications require comprehensive investigations of the components in conditions close to the application. Irregularities in heating of mechanical parts reveal regions with increased loading of pressure, draft or friction. In the long run this leads to damage and total failure of the machine. Thermographic measurements of rotating objects, e.g., rolling bearings, brakes, and clutches provide an approach to investigate those defects. However, it is challenging to measure fast-rotating objects accurately. Currently one contact-free approach is performing stroboscopic measurements using an infrared sensor. The data acquisition is triggered so that the image is taken once per revolution. This leads to a huge loss of information on the majority of the movement and to motion blur. The objective of this research is showing the potential of using an optomechanical image derotator together with a thermographic camera. The derotator follows the rotation of the measurement object so that quasi-stationary thermal images during motion can be acquired by the infrared sensor. Unlike conventional derotators which use a glass prism to achieve this effect, the derotator within this work is equipped with a sophisticated reflector assembly. These reflectors are made of aluminum to transfer infrared radiation emitted by the rotating object. Because of the resulting stationary thermal image, the operation can be monitored continuously even for fast-rotating objects. The field of view can also be set to a small off-axis region of interest which then can be investigated with higher resolution or frame rate. To depict the potential of this approach, thermographic measurements on a rolling bearings in different operating states are presented.
AB - Increasing requirements concerning the quality and lifetime of machine components in industrial and automotive applications require comprehensive investigations of the components in conditions close to the application. Irregularities in heating of mechanical parts reveal regions with increased loading of pressure, draft or friction. In the long run this leads to damage and total failure of the machine. Thermographic measurements of rotating objects, e.g., rolling bearings, brakes, and clutches provide an approach to investigate those defects. However, it is challenging to measure fast-rotating objects accurately. Currently one contact-free approach is performing stroboscopic measurements using an infrared sensor. The data acquisition is triggered so that the image is taken once per revolution. This leads to a huge loss of information on the majority of the movement and to motion blur. The objective of this research is showing the potential of using an optomechanical image derotator together with a thermographic camera. The derotator follows the rotation of the measurement object so that quasi-stationary thermal images during motion can be acquired by the infrared sensor. Unlike conventional derotators which use a glass prism to achieve this effect, the derotator within this work is equipped with a sophisticated reflector assembly. These reflectors are made of aluminum to transfer infrared radiation emitted by the rotating object. Because of the resulting stationary thermal image, the operation can be monitored continuously even for fast-rotating objects. The field of view can also be set to a small off-axis region of interest which then can be investigated with higher resolution or frame rate. To depict the potential of this approach, thermographic measurements on a rolling bearings in different operating states are presented.
KW - Infrared imaging
KW - Optomechanical image derotator
KW - Rolling bearings
KW - Rotating machinery
KW - Temperature measurements
UR - http://www.scopus.com/inward/record.url?scp=85038956993&partnerID=8YFLogxK
U2 - 10.1117/12.2271817
DO - 10.1117/12.2271817
M3 - Conference contribution
AN - SCOPUS:85038956993
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Infrared Sensors, Devices, and Applications VII
A2 - LeVan, Paul D.
A2 - D'Souza, Arvind I.
A2 - Sood, Ashok K.
A2 - Wijewarnasuriya, Priyalal
PB - SPIE
T2 - Infrared Sensors, Devices, and Applications VII 2017
Y2 - 9 August 2017 through 10 August 2017
ER -