Measurement of material properties
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United States of America Patent
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Jul 15, 2014
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app pub date -
Feb 1, 2011
filing date -
Feb 1, 2010
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Abstract
A system and method employing a general impedance as a cost-effective detector to measure dielectric properties of a material at both high and low frequencies, using combinations of resistance, capacitance, and inductance. The method may be applied in a wood drying installation including a kiln as coaxial cable element for a data transmission, wherein metal walls and doors of the kiln grounded to the soil include the outer coaxial conductor (shield) relative to a substantially isolated axial central conductor. The method is further suitable for determining the fiber saturation point of wood by measuring the loss tangent of the wood and determining the point where the time derivative of the loss-tangent equals zero, which corresponds to the fiber saturation point of the wood.
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