METHOD FOR EARLY DETECTION OF RESONANCE PROPERTIES OF STANDING WOOD Russian patent published in 2012 - IPC G01N33/46 

FIELD: physics.

SUBSTANCE: method for early detection of resonance properties of standing wood, mainly undergrowth, by determining dendro-acoustic properties of the analysed sample, involves taking samples in form of cuttings from fir undergrowth from the sunny side of the middle side branches, except the last three-year old shoots. Natural frequency of vibration of the collected cuttings is determined using a resonance technique. The frequency-amplitude histogram is obtained in automatic mode using a personal computer with a full duplex sound card and a program. The frequency-amplitude histogram is identified with a reference histogram obtained beforehand, taking into account density and actual thickness of the cuttings. Presence of resonance properties in the undergrowth is determined from the identification results with given degree of probability of not less than 0.95.

EFFECT: method increases accuracy of detecting resonance properties of standing wood.

1 dwg, 1 ex