A New Numerical Approach to the Calibration and Interpretation of PEA Measurements

Mulla, Awat A, Dodd, Stephen J, Chalashkanov, Nikola M and Dissado, Leonard A (2020) A New Numerical Approach to the Calibration and Interpretation of PEA Measurements. IEEE Trans. on Dielectrics and Electrical Insulation . ISSN 1070-9878

Documents
A New Numerical Approach to the Calibration and Interpretation of PEA Measurements
[img]
[Download]
[img] PDF
8474 proofed sjd_Awat.pdf - Whole Document

754kB
Item Type:Article
Item Status:Live Archive

Abstract

In this paper, a new approach for interpreting raw PEA signals is proposed. The theory behind acoustic wave propagation in ideal (no attenuation and no dispersion) materials and in real materials (with attenuation and dispersion) initially free of space charge is described. A simulation model has been developed for the following: (1) the acoustic signal formation in the PEA apparatus, the transmission of the acoustic waves, their attenuation/dispersion and detection; (2) the instrumental effects of having a capacitive piezoelectric sensor driving a 50 Ohm input impedance amplifier. The various layers of a PEA system were considered in the model and the effect of each layer on the acoustic wave propagation is analyzed. Since the model allowed raw PEA data to be simulated, it can be used to identify potential sources of error in interpreting real PEA measurement data, such as acoustic mismatch between PEA layers, electrode material effects, pulse voltage, etc. The results showed good agreement between the simulated and experimentally obtained data in the case of space charge free samples.

Keywords:pulsed electroacoustic (PEA) measurements, finite differences method (FDM), acoustic propagation and attenuation
Subjects:H Engineering > H620 Electrical Engineering
Divisions:College of Science > School of Engineering
ID Code:39300
Deposited On:06 Jan 2020 09:55

Repository Staff Only: item control page