Method and apparatus for determining vertical density profiles i

Details Method and apparatus for determining vertical density profiles i Method and apparatus for determining vertical density profiles i

1988-08-08

1989-05-23

Tokar, Michael J.

Measuring and testing

Vibration

By mechanical waves

G01N 2900

Patent

active

048318809

ABSTRACT:
Method and apparatus for determining vertical density profiles in wood composites. A fly cutter is rotated across the edge of a wood composite panel to produce acoustic emissions that themselves produce an RMS voltage. The changes is RMS voltage so produced are recorded and thereby the acoustic emission is recorded. The detected signal is transformed into electrical signals, amplified and transmitted to a suitable detecting transducer.

REFERENCES:
patent: 2790968 (1957-04-01), Cook et al.
patent: 3066525 (1962-12-01), Harris
patent: 3209177 (1965-09-01), Minasian
patent: 3986391 (1976-10-01), Vahaviolos
patent: 4309903 (1982-01-01), Ono

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