Energizing Emergency Exit Signs with Wireless Energy Transfer

Mohamed Z. Chaari (), Gilroy P. Pereira, Mohamed Abdelfatah, Rashid Al-Rahimi and Otman Aghzout
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Mohamed Z. Chaari: FAB-LAB, Qatar Scientific Club, Doha 9769, Qatar
Gilroy P. Pereira: FAB-LAB, Qatar Scientific Club, Doha 9769, Qatar
Mohamed Abdelfatah: FAB-LAB, Qatar Scientific Club, Doha 9769, Qatar
Rashid Al-Rahimi: FAB-LAB, Qatar Scientific Club, Doha 9769, Qatar
Otman Aghzout: SIGL Laboratory, Department of Computer Science Engineering, ENSA, University Abdelmalek Essaadi, Tetouan 93153, Morocco

Energies, 2023, vol. 16, issue 13, 1-39

Abstract: Emergency exit lights in public buildings are necessary for safety and evacuation. International safety standards require such lighting in many public places, like airports, schools, malls, hospitals, and other spaces, to prevent human casualties in emergencies. Emergency exit lights have become an essential part of casualty reduction projects. They can pose several application problems, including fire safety concerns. The issue of providing a safe way and operating emergency exit lights along one side of a long path arises during an emergency. Many studies in this field consider the case in which emergency exit lights’ battery or main power fails. Power failures in dangerous situations such as fires or terrorist attacks make it difficult for people to escape. The lighting in open areas and stairwells during an emergency should be at least 2 lux. This work proposes an innovative technique for wirelessly powering emergency lights using microwave energy. Specifically, the study designed and fabricated a new wirelessly powered emergency lighting prototype. This prototype’s wireless power transfer (WPT) base comprises an RF/DC converter circuit and an RF microwave transmitter station. The device can harvest RF microwave energy to energize the emergency light. This research aimed to develop a compact device that captures maximum RF strength to power emergency lights. As a prototype, the proposed device was designed to provide sufficient microwave energy to power an emergency light at 3 W over a 62 m distance.

Keywords: microwave; radio frequency; rectenna; wireless energy transfer; emergency exit signs; emergency exit lights (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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