Impedance Based Health Monitoring Technique with Probabilistic Neural Network for Possible Wall Thinning Detection of Metal Structures

Table 1

Properties of the PZT used for the study.

Parameter	Symbol	Value
Relative; dielectric constant		1800
Piezoelectric; strain coefficient		390 × 10^−12 m/V
		−190 × 10^−12 m/V
Piezoelectric voltage coefficient		24.0 × 10^−3 V m/N
		−11.6 × 10^−3 V m/N
Coupling coefficient		0.72
		0.35