Simulation of a Novel Bridge MEMS-PZT Energy Harvester for Tire Pressure System
Paper i proceeding, 2014

Self-powering is becoming an important issue for autonomous sensor systems. By having an on-the-go power source the life span increases in comparison to a limited battery source. In this paper, simulation of an innovative design for a piezoelectric energy harvester for Tire Pressure Measurement System (TPMS) is presented. The MEMS-based thin-film PZT harvester structure is in the form of a bridge with a big central seismic mass and multiple electrodes. This design takes the advantage of the S-profile bending and a short beam length to concentrate the piezoelectric effect in a small segment along the beam and maximize the power output for a given displacement. From simulation in Comsol Multiphysics, the 9mm x 5mm bridge, seismic mass of 8.7mg and resonance frequency of 615Hz, generates 1 mu W by mechanical pulses excitation equivalent to driving at 60 km/h (roughly 180G).


Edoardo Trabaldo

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Elof Köhler

Chalmers, Teknisk fysik, Elektronikmaterial

Henrik Staaf

Chalmers, Teknisk fysik, Elektronikmaterial

Peter Enoksson

Chalmers, Teknisk fysik, Elektronikmaterial

Cristina Rusu

RISE Research Institutes of Sweden

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 557 1 012041


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