Development of Multiple Cantilevered Piezo Fibre Composite Beams Vibration Energy Harvester for Wireless Sensors
There is considerable interest in the development of battery-free mobile electronics systems such as wireless sensors which are used for the conditioning monitoring of engineering assets some of which are located in hostile environments. The main focus has been on the development of techniques for the harvesting of energy from ambient sources. One of the main sources of ambient energy is mechanical vibration. A number of vibration energy harvesting devices have been developed using electromagnetic, electrostatic or piezoelectric principles. A currently favoured approach is the use of piezoelectric fibre composite (PFC) materials in the form of a cantilevered beam with a tip mass. This enables significant energy to be harvested at the resonance peak of the PFC-mass vibration system. However, off the resonance peak, the harvested vibration energy is relatively too small and, consequently, the bandwidth of reasonable energy harvesting is too small. To overcome this problem, this paper presents the use of a vibration energy harvesting device consisting of four PFC beams with tip masses. Each beam is tuned to a slightly different resonance frequency. Thus, the bandwidth of significant vibration energy harvesting is considerably extended. It is shown that the multiple cantilevered PFC beams vibration energy harvester can harvest energy from ambient vibrations more effectively than a single cantilevered PFC beam vibration energy harvester.
KeywordsSensor Node Cantilever Beam Piezoelectric Layer Vibration Energy Ambient Vibration
Unable to display preview. Download preview PDF.
- 1.Anton SR & Sodano HA. (2007) A review of power harvesting using piezoelectric materials (2003–2006) Smart Materials and Structures 16, R1–R21Google Scholar
- 4.Cook-Chennault KA, Thambi N & Sastry AM. (2008) Powering MEMS portable devices – a review of non-regenerative and regenerative power supply systems with emphasis on piezoelectric energy harvesting systems, Smart Materials and Structures 17, 043001, 1–33Google Scholar
- 11.Roundy S, Wright PK & Rabaey J. (2002) Micro-electrostatic vibration-to-electricity converters Proceedings of the ASME 2002 International Mechanical Engineering Congress and ExpositionGoogle Scholar
- 16.Erturk, A & Inman, DJ. (2007) Mechanical Considerations for Modeling of Vibration-Based Energy Harvesters, Proceedings of the ASME IDETC 21st Biennial Conference on Mechanical Vibration and Noise.Google Scholar
- 17.Blevins, RD. (1979) Formulas for Natural Frequency and Mode Shape, Van Nostrand Reinhold, New York.Google Scholar