Energy harvesting and evaluation of a novel piezoelectric bridge transducer

G. Yesner, A. Jasim, H. Wang, B. Basily, A. Maher, A. Safari

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A novel bridge transducer based on the cymbal design has been developed for energy harvesting from impact loading by vehicle-induced deformations on pavement. The bridge transducer consists of a 2 mm thick 32 × 32 mm square soft PZT ceramic and hardened steel end caps. A unique electrode design enables the PZT to be poled along its length, effectively utilizing d33 mode for enhanced energy generation. The effective d33, of d33 eff of a bridge transducer is 19,000 pC/N and the effective piezoelectric voltage coefficient, g33 eff, is 2150 × 10−3 Vm/N. When compared to the conventional cymbal transducer design, horizontal poling increases energy and voltage considerably. Each loading at 600 lbs generates 0.83 mJ of energy from the prototype transducer module with 64 transducers in parallel. Loading under simulated traffic conditions at 500 lb and 5 Hz generates 2.1 mW at a resistive load of 330 kOhm. The reliability and cycles to failure of the transducer design is studied and the transducers are evaluated after 50,000 loading cycles. Inconsistency in the epoxy layer thickness has been identified as the cause of premature failure.

Original languageEnglish (US)
Pages (from-to)348-354
Number of pages7
JournalSensors and Actuators, A: Physical
Volume285
DOIs
StatePublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Keywords

  • Bridge transducer
  • Cymbal transducer
  • Piezoelectric energy harvesting
  • Surface poling

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