Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2006-02-10
2009-10-20
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S602000, C702S056000
Reexamination Certificate
active
07603904
ABSTRACT:
A method and apparatus for determining a characteristic, such as the stiffness, of a portion of a wood specimen characterised by the steps of a) producing an acoustic signal in the wood specimen part way along the length of the wood specimen, and b) sensing a response in the wood specimen part way along the length of the wood specimen including a reverberation from a first end of the wood specimen, and c) calculating a characteristic of a portion of the wood specimen from analysis of the sensed response. A related method and apparatus may be used to determine a characteristic of a portion of a tree stem during harvesting of a tree and the characteristic used to optimise the value of a log cut from the stem.
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Andrews Michael Kenneth
Deuss Eberhard Juergen
Gamble Paul
Harris Paul David
Lecarpentier Frederic
Darby & Darby P.C.
Miller Rose M
Waratah NZ Limited
Williams Hezron
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