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Energialstring för drivande av smart enhet utan batterier: Design av ett energialstrande system för smart sko genom piezoelektronik och solceller
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Health Informatics and Logistics.
2019 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Energy harvesting to power smart unit without batteries : Design of an energy harvesting system implementing piezoelectronics and solar cells for a smart shoe (English)
Abstract [sv]

Projektet beskriver ett tillvägagångssätt för att alstra energi genom solceller och piezoelektronik. Ett kretskortsbaserat system designades som utnyttjade superkondensatorer som lagringsenhet. Planen var att integrera systemet i en sko. Genom denna teknik kan man då substituera eller minimera batteriladdningen för smarta enheter eller mindre anordningar. Det önskvärda resultatet med projektet var att se om det gick att koppla detta system till en mikrokontroller som kunde drivas på låg spänning. Rapporten fick ett positivt resultat med en konstant utspänning på 1.8 volt som kunde driva en mikrokontroller. Dock tog det lång tid för superkondensatorerna att laddas upp på grund av den impedans som fanns i systemet. Aktiviteter som utnyttjar detta system kommer att påverka uppladdningens resultat. Detta gör kretsen optimal för aktiviteter som involverar rörelse och sol, såsom hiking.

Abstract [en]

The past couple of decades gave rise to smartphones, smart watches, and smart homes. Now researchers are looking for ways to make smart clothing. One use case of smart clothing is smart shoes which can give some very useful sensed information especially in the sports industry and healthcare. Such sensed data include temperature, distance and calories, fall detection and many more. This application scenario can be designed to be battery free if we make use of the human motion and solar power. Many research papers exist which present how to exploit swing and shock excitations from the shoes to harvest energy. In this project this energy combined with solar energy will be used to power a low driven MCU. I design a pcb which include solar panels and piezoelectric modules to store the energy in supercapacitors. The goal is to integrate this pcb in a shoe, meaning that it has to have a small size and low power. The results of the project showed that a constant voltage at 1.8 volt could be achieved however recharge time is a factor to take into consideration. The system showed positive results for activities including movements and sun such as hiking.

Place, publisher, year, edition, pages
2019. , p. 44
Series
TRITA-CBH-GRU ; 2019:130
Keywords [en]
PCB, smart shoes, energy harvest, piezoelectronics, supercapacitors, solar cells
Keywords [sv]
Kretskort, smart sko, energialstring, piezoelektronik, superkondensatorer, solceller
National Category
Embedded Systems
Identifiers
URN: urn:nbn:se:kth:diva-260359OAI: oai:DiVA.org:kth-260359DiVA, id: diva2:1355402
Subject / course
Electrical Engineering
Educational program
Bachelor of Science in Engineering - Electrical Engineering
Supervisors
Examiners
Available from: 2019-09-30 Created: 2019-09-27 Last updated: 2019-09-30Bibliographically approved

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