Patent ID: 9689822
Date: 2017-06-27
CPC Classifications: G01N

Claim:
1. A method for evaluating a dielectric material comprising: providing a dielectric material including a first major surface, a second major surface, and a thickness therebetween; providing a first electrode adjacent the first major surface and a second electrode adjacent the second major surface, wherein the first and second electrodes and the dielectric material are moveable relative to each other in a lengthwise direction of the dielectric material; applying an excitation signal to at least one of the first and second electrodes to generate an electric field across the dielectric material, wherein the excitation signal includes an alternating current waveform having a plurality of component frequencies; measuring the electrical signature of the dielectric material by sampling the current or voltage from at least one of the first and second electrodes; and comparing the measured electrical signature against an expected electrical signature to evaluate, based on the comparison, a property of the dielectric material over at least a portion of the length of the dielectric material, wherein the property of the dielectric material includes pore size.