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Sensors 2013, 13(5), 5448-5459; doi:10.3390/s130505448
Article

The Development of Sun-Tracking System Using Image Processing

* ,
 and
High Concentration Photovoltaic R&D Project, Institute of Nuclear Energy Research, Taoyuan 32546, Taiwan
* Author to whom correspondence should be addressed.
Received: 30 January 2013 / Revised: 17 April 2013 / Accepted: 17 April 2013 / Published: 24 April 2013
(This article belongs to the Section Physical Sensors)
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Abstract

This article presents the development of an image-based sun position sensor and the algorithm for how to aim at the Sun precisely by using image processing. Four-quadrant light sensors and bar-shadow photo sensors were used to detect the Sun’s position in the past years. Nevertheless, neither of them can maintain high accuracy under low irradiation conditions. Using the image-based Sun position sensor with image processing can address this drawback. To verify the performance of the Sun-tracking system including an image-based Sun position sensor and a tracking controller with embedded image processing algorithm, we established a Sun image tracking platform and did the performance testing in the laboratory; the results show that the proposed Sun tracking system had the capability to overcome the problem of unstable tracking in cloudy weather and achieve a tracking accuracy of 0.04°.
Keywords: image-based Sun position sensor; image processing; four-quadrant light sensor; bar-shadow photo sensor image-based Sun position sensor; image processing; four-quadrant light sensor; bar-shadow photo sensor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Lee, C.-D.; Huang, H.-C.; Yeh, H.-Y. The Development of Sun-Tracking System Using Image Processing. Sensors 2013, 13, 5448-5459.

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