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research-article

Dual-axis Solar Tracker Design Based on a Digital Hemispherical Imager

[+] Author and Article Information
Zakaria El Jaouhari

Computer Science and Systems Engineering Laboratory, Abdelmalek Essaadi University, faculty of sciences, Tetuan, Morocco
zakaria.elj@gmail.com

Youssef Zaz

Computer Science and Systems Engineering Laboratory, Abdelmalek Essaadi University, faculty of sciences, Tetuan, Morocco
youssef.zaz@gmail.com

Salah Moughyt

Computer Science and Systems Engineering Laboratory, Abdelmalek Essaadi University, faculty of sciences, Tetuan, Morocco
salah.moughyt@gmail.com

Omar El Kadmiri

Computer Science and Systems Engineering Laboratory, Abdelmalek Essaadi University, faculty of sciences, Tetuan, Morocco
omar.elkadmiri@gmail.com

Zakaria El Kadmiri

Computer Science and Systems Engineering Laboratory, Abdelmalek Essaadi University, faculty of sciences, Tetuan, Morocco
zakaria.elkadmiri2017@gmail.com

1Corresponding author.

ASME doi:10.1115/1.4039098 History: Received June 28, 2017; Revised January 17, 2018

Abstract

A design of solar tracker with a new tracking method based on computer vision techniques is presented in this paper. The proposed method extracts the sun coordinates (orientation ?, elevation f) in real time from hemispherical sky images using an image processing algorithm and then drives a pair of motors to move solar panels (or heliostat) toward the sun. To ensure a wide field of view, a camera equipped with a fisheye lens is used to acquire the whole sky images. The advantages of such a system are the high sensitivity to brightness comparing to the traditional photo sensors based trackers that making the system more efficient and able to determine the sun position even in cloudy days. It also operates independently of time and position which makes it reliable in case of mobile solar station, contrary to systems based on astronomical equations.

Copyright (c) 2018 by ASME
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