Characterization of material under test (MUT) with electromagnetic impedance spectroscopy
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United States of America Patent
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Dec 25, 2018
Grant Date -
Feb 25, 2016
app pub date -
Aug 13, 2015
filing date -
Aug 19, 2014
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Abstract
Methods of extracting complex impedance from selected subsurface volumes of a material under test (MUT) using various embodiments of electrode sensor pairs are provided. The electrode pairs can penetrate into a subsurface of the MUT, and operate below the surface of the MUT. Configurations of electrode pair sensors provide measured data of complex impedance of selected subsurface volumes of the MUT using electromagnetic spectrographic signals over a frequency range. The complex impedance characteristics of the subsurface volumes may be used to identify variations in the properties of the MUT, or be correlated to physical properties of the MUT.
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