Method and apparatus for measurement of density profiles in wood

Details Method and apparatus for measurement of density profiles in wood Method and apparatus for measurement of density profiles in wood

1988-09-22

1989-08-08

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

73801, 73 32A, G01N 2904

Patent

active

048541729

ABSTRACT:
Method and apparatus for evaluating the density profile of a wood-derived specimen. A sample of the material is mounted on a lathe and rotated at high speed. An acoustic emission transducer is coupled to a cutting tool, brought into contact with the specimen to produce an AE signal, as the tool is moved across the thickness of the rotating sample. The acoustic emission signal is then transformed into an electrical signal and the resultant electrical signal is amplified and transmitted to a second amplifier for further amplification and analysis of the signal.

REFERENCES:
patent: 4292847 (1981-10-01), Tait
patent: 4766647 (1988-08-01), Ackermann Jr. et al.

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