D7.3 - Autonomous Tuning Methods for Piezoelectric Energy Harvesting Generators
- Event
- AMA Conferences 2017
2017-05-30 - 2017-06-01
Nürnberg, Germany - Band
- Proceedings Sensor 2017
- Chapter
- D7 - Energy Harvesting
- Author(s)
- L. Mateu, J. Knauer, P. Spies, H. Zessin - Fraunhofer Institute for Integrated Circuits IIS, Nuremberg (Germany)
- Pages
- 540 - 545
- DOI
- 10.5162/sensor2017/D7.3
- ISBN
- 978-3-9816876-4-4
- Price
- free
Abstract
This paper explores two different methodologies that are able to change the resonance frequency of a piezoelectric cantilever. In real-life energy harvesting applications like logistics, condition or structural health monitoring, the ambient frequency is changing. A drawback of harvesting energy from ambient vibrations is the fact that the frequency of the ambient vibration and the resonance frequency of the piezoelectric generator should match. Therefore, in order to sufficiently and continuously harvest energy from ambient vibrations, it is necessary to be able to change the resonance frequency of the piezoelectric generator. To overcome this challenge, two frequency tuning methodologies that can be applied autonomously in operation are presented. A 10 % frequency tuning is desired for example by applications in logistics.