Robust Deflectometry

Authors

DOI:

https://doi.org/10.52825/solarpaces.v2i.756

Keywords:

Deflectometry, Optical Metrology, SOFAST, Concentrating Solar Power, Robust

Abstract

Concentrating Solar Power (CSP) mirrors must have high slope accuracy in order to achieve high solar concentration. Deflectometry is an established method for measuring high-resolution, high-accuracy maps of mirror slope. In this paper we describe improvements to Sandia’s deflectometry system, SOFAST, which enable it to be accurately calibrated even in difficult conditions of poor access to system components, imperfect components, and varying ambient light. These extensions improve the robustness of the system and expand the range of problems it can solve.

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References

[1] C. E. Andraka, et. al., “Rapid Reflective Facet Characterization Using Fringe Reflection Techniques,” Proceedings of Energy Sustainability 2009, ASME.

[2] T. März, et al. Validation of Two Optical Measurement Methods for the Qualification of the Shape Accuracy of Mirror Panels for Concentrating Solar Systems. Journal of Solar Energy Engineering 133, August 2011.

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[4] S. Ulmer, T. März, C. Prahl, W. Reinalter, B. Belhomme. Automated high resolution measurement of heliostat slope errors. Solar Energy 85, pp. 685-687, 2011.

[5] R. Brost, B. Smith, F. Brimigion. Agile Deflectometry. Presented in SolarPACES 2022.

[6] C. E. Andraka, et al. AIMFAST: Initial Dish System Alignments Results Using Fringe Reflection Methods. Proceedings of ASME 2011 5th International Conference on Energy Sustainability. 2011.

[7] OpenCV. https://docs.opencv.org/4.x/dc/dbb/tutorial_py_calibration.html.

[8] S. Garrido-Jurado, et. al., “Automatic generation and detection of highly reliable fiducial markers under occlusion,” Pattern Recognition, vol. 47, no.6, pp. 2280-2292, 2014, https://doi.org/10.1016/j.patcog.2014.01.005.

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Published

2024-09-16

How to Cite

Smith, B., & Brost, R. (2024). Robust Deflectometry. SolarPACES Conference Proceedings, 2. https://doi.org/10.52825/solarpaces.v2i.756

Conference Proceedings Volume

Vol. 2 (2023): SolarPACES 2023, 29th International Conference on Concentrating Solar Power, Thermal, and Chemical Energy Systems

Section

Measurement Systems, Devices, and Procedures

License

Copyright (c) 2024 Braden Smith, Randy Brost

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Received 2023-09-21
Accepted 2024-07-19
Published 2024-09-16

Funding data