Sistem za meritev homogenosti in avtomatsko kalibracijo umetnega LED sonca

Uran Oblak, Tjaž (author), Pirc, Matija (mentor), Jošt, Marko (comentor)

Pri razvoju sončnih celic potrebujemo standardni vir svetlobe za njihovo testiranje. Za ta namen uporabljamo umetna sonca oz. sončne simulatorje. Ta morajo biti ustrezno kalibrirana. Eden izmed izzivov kalibracije je zagotavljanje homogenega obsevanja ciljne površine. Pri umetnih soncih sestavljenih iz svetlečih diod lahko homogenost prilagajamo z nastavljanjem moči posameznih svetlečih diod. V tem magistrskem delu smo razvili namenski merilni sistem, ki meri nehomogenost obsevanja ciljne površine umetnega sonca in mu iterativno spreminja moči posameznih svetlečih diod, da doseže najboljšo možno homogenost obsevanja. Sistem avtomatsko kalibrira umetno sonce hitreje kot z ročno kalibracijo, homogenost ciljne površine pa smo izboljšali za 40%. Nehomogenost obsevanja po avtomatski kalibraciji na obsevanje naravnega sonca je znašala 4,2%, sama kalibracija pa je trajala le 5 minut.

• Language: Slovenian
• Keywords: umetno sonce, avtomatska kalibracija, homogenost obsevanja, svetleče diode
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FE - Faculty of Electrical Engineering
• Year: 2025
• PID: 20.500.12556/RUL-170045
• COBISS.SI-ID: 241811459
• Publication date in RUL: 02.07.2025

Secondary language

• Language: English
• Title: System for Measuring Homogeneity and Automatic Calibration of Artificial LED Sun

Abstract

In the research and development of photovoltaic cells, we need to use a standardised light source. For this purpose, we use artificial sun simulators. They have to be adequately calibrated. One of the challenges of calibration is ensuring homogeneous irradiance of the target surface. When using artificial sun simulators made with light-emitting diodes, we can change the homogeneity of irradiance by changing the power levels of individual light-emitting diodes. In this master's thesis, we have developed a measuring system that measures the homogeneity of irradiance on the target surface of the artificial sun simulator and iteratively changes the power levels of the light-emitting diodes so that the best homogeneity is achieved. The system automatically calibrates the artificial sun faster compared to manual calibration. We have achieved a 40% increase in the homogeneity of irradiance on the target surface. Following automatic calibration to natural sunlight irradiance, the nonhomogeneity was reduced to 4,2%. The calibration was completed in only 5 minutes.

• Keywords: artificial sun, automatic calibration, homogeneity of irradiance, light-emitting diodes