Paper Title:
Analysis of Piezoelectric Acoustic Sensor Based on Negative Impedance with FEM in Composite Materials
  Abstract

Piezoelectric acoustic sensor with negative impedance matching circuit is put forward to enhance its sensitivity at low frequencies. The multi-physics problem coupled with sound wave equations, structure stress-strain equations, piezoelectric constitutive equations and electric ordinary equations is analyzed with FEM in detail. Frequency response characteristics are simulated when shunted with negative-capacitance, resistance in series. Sensitivity is obtained from 1kHz to 5kHz. When used proper electrical elements, the sensitivity of the piezoelectric sensor can even exceed that of no matching circuit over 2 factors in broad band.

  Info
Periodical
Chapter
Chapter 1: Material Engineering and its Application
Edited by
Helen Zhang and David Jin
Pages
109-112
DOI
10.4028/www.scientific.net/AMR.321.109
Citation
W. Q. Zhang, X. Y. Wu, W. Cao, "Analysis of Piezoelectric Acoustic Sensor Based on Negative Impedance with FEM in Composite Materials", Advanced Materials Research, Vol. 321, pp. 109-112, 2011
Online since
August 2011
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$32.00
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