A method and apparatus for detecting areas of differential density in logs, cants, timbers, poles or trees comprises applying a signal to one or more pairs of electrodes and measuring the magnitude and phase shift of the voltage, current or impedance at an output electrode. Electrodes may be arranged...http://www.google.es/patents/US20030001595?utm_source=gb-gplus-sharePatente US20030001595 - Through-log density detector
Número de solicitud: 10/171,977 Número de publicación: US 2003/0001595 A1 Fecha de presentación: 17 Jun 2002 Patente emitida: US6784672 ( Fecha de emisión 31 Ago 2004)
