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Abstract

An in-kiln moisture measurement system using in-kiln measurement electronics to produce wood moisture content readings virtually unaffected by temperature variations. The system comprises electrodes in communication with wood in a kiln, a per kiln unit (PKU) containing signal processing circuitry, and a sending unit with a circuit comprised of redundant half-circuits that compensate for the effects of temperature variations in the electronic components. One half-circuit measures moisture content of the wood; the other half-circuit measures a reference load. Matched characteristics of the transistors in each circuit ensure that each half-circuit's readings drift at about the same rate and in the same direction when experiencing temperature changes. An automatic tuning unit can be used to automatically adjust properties of the PKU's circuitry and compensate for other capacitances in the system.

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First Claim