Waratah Nz Limited

Russell John Petherick

Alex James Stevenson

Eugene Stytsenko

Paul David Harris

Paul Gamble

Eberhard Juergen Deuss

Frederic Lecarpentier

Michael Kenneth Andrews

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.

Method and apparatus for assessing or predicting the characteristics of wood

Growing community of inventors

Wainuiomata, New Zealand

Russell John Petherick