Piezoelectric energy harvesting using stochastic resonance in rotating systems
Typ
Examensarbete för masterexamen
Program
Nanotechnology (MPNAT), MSc
Publicerad
2019
Författare
Forsberg, Gustav
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Sensors can be found virtually anywhere in today’s society. With the ever developing
technologies around us, the number of sensors is set to increase even faster in the near
future. The Internet of Things and self-driving cars are just some of the emerging
technologies that use huge amounts of sensors, and with these sensors comes the
power demand of each of them. Today batteries are still the dominant power supply
for sensors, however, energy harvesting technologies are in development to replace
them.
This thesis examines the possibility to use a piezoelectric harvester to power a sensor
mounted on a flexplate in a combustion engine. By studying current technologies,
a concept was established and with simulations and experiments it was evaluated.
The concept combined two previous designs and eliminated components previously
used, creating a smaller harvester. The final harvester was based on an off the shelf
piezoelectric harvester where the proof mass and placement of the harvester was
simulated in order to optimize the performance. The simulation on the final design
show a peak power of 370 μW and a 3 dB bandwidth of 2.44 Hz, promising results
that could be used as the foundation in the development of a functional harvester.
Beskrivning
Ämne/nyckelord
Piezoelectric, energy harvesting, stochastic resonance, rotation, cantilever, vibration