Analysis of Piezoelectric Acoustic Sensor Based on Negative Impedance with FEM in Composite Materials

Abstract:

Article Preview

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:

Edited by:

Helen Zhang and David Jin

Pages:

109-112

DOI:

10.4028/www.scientific.net/AMR.321.109

Citation:

W. Q. Zhang et al., "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

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.