The conventional method of initial heliostat calibration by sequentially pointing the heliostats one by one onto a target is a very slow process. The use of unmanned airborne vehicles (UAVs) is a possible approach to developing a less time consuming procedure for the initial setup of the field control system and elimination of offset in light beam pointing. This paper presents a UAV based method for measuring the heliostat offset in two stages. The first stage, preliminary and less accurate, creates a three-dimensional model of the mirror facet corners in order to estimate the heliostat orientation. The estimated orientation from the first stage is a prerequisite for the second stage of measurement, in which the highly accurate heliostat orientation is derived from deflectometrically measuring the mirror shape. While work is still ongoing to fully implement the final steps of the second stage, the measuring principles has been demonstrated and partially validated for the first stage.
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12 May 2022
SOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems
28 September–2 October 2020
Freiburg, Germany
Research Article|
May 12 2022
A two-stage method for measuring the heliostat offset
Wilko Jessen;
Wilko Jessen
a)
1
German Aerospace Center (DLR), Institute of Solar Research
, Paseo de Almeria 73, 04001 Almería, Spain
a)Corresponding author: wilko.jessen@dlr.de
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Marc Röger;
Marc Röger
b)
1
German Aerospace Center (DLR), Institute of Solar Research
, Paseo de Almeria 73, 04001 Almería, Spain
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Christoph Prahl;
Christoph Prahl
1
German Aerospace Center (DLR), Institute of Solar Research
, Paseo de Almeria 73, 04001 Almería, Spain
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Robert Pitz-Paal
Robert Pitz-Paal
2
German Aerospace Center (DLR), Institute of Solar Research
, Linder Höhe, 51147 Cologne, Germany
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a)Corresponding author: wilko.jessen@dlr.de
AIP Conf. Proc. 2445, 070005 (2022)
Citation
Wilko Jessen, Marc Röger, Christoph Prahl, Robert Pitz-Paal; A two-stage method for measuring the heliostat offset. AIP Conf. Proc. 12 May 2022; 2445 (1): 070005. https://doi.org/10.1063/5.0087036
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