Details
| Original language | English |
|---|---|
| Article number | 1599 |
| Number of pages | 17 |
| Journal | Sensors |
| Volume | 21 |
| Issue number | 5 |
| Publication status | Published - 25 Feb 2021 |
Abstract
Optical 3D geometry reconstruction, or more specific, fringe projection profilometry, is a state-of-the-art technique for the measurement of the shape of objects in confined spaces or under rough environmental conditions, e.g., while inspecting a wrought-hot specimen after a forging operation. While the contact-less method enables the measurement of such an object, the results are influenced by the light deflection effect occurring due to the inhomogeneous refractive index field induced by the hot air around the measurand. However, the developed active compensation methods to fight this issue exhibits a major drawback, namely an additional cooling of the object and a subsequent transient illumination component. In this paper, we investigate the cooling and its effect on temporal phase reconstruction algorithms and take a theoretical approach to its compensation. The simulated compensation measures are transferred to a fringe projection profilometry setup and are evaluated using established and newly developed methods. The results show a significant improvement when measuring specimens under a transient illumination and are easily transferable to any kind of multi-frequency phase-shift measurement.
Keywords
- Fringe projection profilometry, Harsh conditions, Hot measurement object
ASJC Scopus subject areas
- Chemistry(all)
- Analytical Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Instrumentation
- Engineering(all)
- Electrical and Electronic Engineering
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In: Sensors, Vol. 21, No. 5, 1599, 25.02.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Adapted Fringe Projection Sequences for Changing Illumination Conditions on the Example of Measuring a Wrought-Hot Object Influenced by Forced Cooling
AU - Quentin, Lorenz
AU - Beermann, Rüdiger
AU - Reinke, Carl
AU - Kern, Pascal
AU - Kästner, Markus
AU - Reithmeier, Eduard
N1 - Funding Information: Funding: This research was funded by Deutsche Forschungsgemeinschaft (DFG); Collaborative Research Centre 1153 (CRC) “Process Chain to Produce Hybrid High-performance Components Through Tailored Forming”; Subproject C5 “Multiscale Geometry Inspection of Joining Zones”; 252662854.
PY - 2021/2/25
Y1 - 2021/2/25
N2 - Optical 3D geometry reconstruction, or more specific, fringe projection profilometry, is a state-of-the-art technique for the measurement of the shape of objects in confined spaces or under rough environmental conditions, e.g., while inspecting a wrought-hot specimen after a forging operation. While the contact-less method enables the measurement of such an object, the results are influenced by the light deflection effect occurring due to the inhomogeneous refractive index field induced by the hot air around the measurand. However, the developed active compensation methods to fight this issue exhibits a major drawback, namely an additional cooling of the object and a subsequent transient illumination component. In this paper, we investigate the cooling and its effect on temporal phase reconstruction algorithms and take a theoretical approach to its compensation. The simulated compensation measures are transferred to a fringe projection profilometry setup and are evaluated using established and newly developed methods. The results show a significant improvement when measuring specimens under a transient illumination and are easily transferable to any kind of multi-frequency phase-shift measurement.
AB - Optical 3D geometry reconstruction, or more specific, fringe projection profilometry, is a state-of-the-art technique for the measurement of the shape of objects in confined spaces or under rough environmental conditions, e.g., while inspecting a wrought-hot specimen after a forging operation. While the contact-less method enables the measurement of such an object, the results are influenced by the light deflection effect occurring due to the inhomogeneous refractive index field induced by the hot air around the measurand. However, the developed active compensation methods to fight this issue exhibits a major drawback, namely an additional cooling of the object and a subsequent transient illumination component. In this paper, we investigate the cooling and its effect on temporal phase reconstruction algorithms and take a theoretical approach to its compensation. The simulated compensation measures are transferred to a fringe projection profilometry setup and are evaluated using established and newly developed methods. The results show a significant improvement when measuring specimens under a transient illumination and are easily transferable to any kind of multi-frequency phase-shift measurement.
KW - Fringe projection profilometry
KW - Harsh conditions
KW - Hot measurement object
UR - http://www.scopus.com/inward/record.url?scp=85101302031&partnerID=8YFLogxK
U2 - 10.3390/s21051599
DO - 10.3390/s21051599
M3 - Article
C2 - 33668803
AN - SCOPUS:85101302031
VL - 21
JO - Sensors
JF - Sensors
SN - 1424-8220
IS - 5
M1 - 1599
ER -