Kern, T. A., Laimer, M., Vu, D., Schitter, G., & Csencsics, E. (2025). Adaptive Power Control for Laser Triangulation Measurements on Moving Samples. In 2025 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM) (pp. 1–6). IEEE Xplore. https://doi.org/10.1109/AIM64088.2025.11175852
2025 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM)
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ISBN:
979-8-3315-3342-7
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Date (published):
29-Sep-2025
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Event name:
2025 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM)
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Event date:
14-Jul-2025 - 18-Jul-2025
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Event place:
Hangzhou, China
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Number of Pages:
6
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Publisher:
IEEE Xplore
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Peer reviewed:
Yes
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Keywords:
Laser Triangulation; Power Control; Measurements in Motion
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Abstract:
This article proposes an adaptive laser power control approach for laser triangulation measurements on moving samples. Utilizing the obtained image intensities as a feedback signal, the effective sample reflectivity is estimated. Based on this estimation, a digital integral controller is adaptively tuned. The thereby determined laser power setpoint is stabilized by a custom laser driver with a bandwidth of 50 kHz. Implementing the digital controller on an FPGA enables power adjustments between two consecutive exposure times, ensuring stable laser power conditions during the exposure. Experimental evaluation on a sloped sample successfully demonstrates that the proposed method reduces the spot size variation on the detector by 81%, ensuring a constant spot size for arbitrary sample orientations and exposure times.
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Project title:
Christian Doppler Labor für Präzise Messungen in Bewegung: CDL_CSENCS_Genehmigung (Christian Doppler Forschungsgesells)
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Project (external):
Austrian Federal Ministry of Labour and Economy National Foundation for Research, Technology and Development Micro-Epsilon-Messtechnik GmbH & Co.K.G.
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Research Areas:
Modeling and Simulation: 30% Automation and Robotics: 40% Sensor Systems: 30%
