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Publication type: Conference paper
Type of review: Not specified
Title: Affordable energy autonomous wireless sensor for day and night
Authors: Meli, Marcel
Hegetschweiler, Lukas
DOI: 10.21256/zhaw-2001
Conference details: Embedded World Conference, Nuremberg, Germany, 23-25 February 2016
Issue Date: 2016
Publisher / Ed. Institution: WEKA Fachmedien
Language: English
Subjects: Wireless; Power management; Solar; Energy harvesting
Subject (DDC): 004: Computer science
621.3: Electrical engineering and electronics
Abstract: Bluetooth Smart is enabling a new class of sensors where device configuration and data presentation can be done using smart phones, tablets, personal computers and even smart watches. Sensors are equipped with a wireless link that allows them to transfer data to other devices or to get information from them. This opens up many applications with high volume potential. The promise of a large market has led to an abundance of Bluetooth Smart solutions, which is a good thing for the consumer. Competition will lead to improved quality and will drive costs down. But there is also the danger of a maintenance nightmare, if questions such as energy consumption and security are not properly addressed. Sensors need a power source and the way this is often done is to use batteries. They are small and low cost. But maintenance of sensors powered by small batteries means finding them (if one can still remember where they are) and changing the batteries. This is both resource consuming and ecologically expensive. Energy harvesting can help bring the needed autonomy, reduce and even eliminate the maintenance issues as far as energy is concerned. So far however, energy harvesting has proved expensive. In this work, we use a new power management system to design a sensor that runs day and night on energy harvested using a very small solar cell.  Part of the energy harvested when there is enough light is stored for use at night. On-the-fly change of the measurement rate allows an optimal management of the energy. We succeeded in designing and building a system with a cost effective solar cell, which can run day and night on harvested energy.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Embedded Systems (InES)
Appears in Collections:Publikationen School of Engineering

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