Method and system for optically testing sawn timber for faults

Details Method and system for optically testing sawn timber for faults Method and system for optically testing sawn timber for faults

1988-07-22

1989-05-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356431, 250572, G01N 2188

Patent

active

048271420

ABSTRACT:
In a timber testing apparatus, use is made of an optical process, in which there is a linewise scanning of the timber surface at right angles to the longitudinal direction of the timber. If an optical detection apparatus (18) indicates a fault, the particular piece of timber is stored as being faulty at this point, so that continuous operation and detection of faults is possible in piece-related and position-related manner, so that suitable parts of the timber with a given, desired fault-free length can be rapidly determined.

REFERENCES:
patent: 3682554 (1972-08-01), Flaczynski
patent: 3840303 (1974-10-01), Clarke
patent: 3920970 (1975-11-01), Slaker
patent: 3976384 (1976-08-01), Matthews et al.
patent: 4179707 (1979-12-01), Sjodin
patent: 4188544 (1980-01-01), Chasson
patent: 4260899 (1981-04-01), Baker
patent: 4403294 (1983-09-01), Hamada et al.
patent: 4417149 (1983-11-01), Takeuchi et al.
patent: 4563095 (1986-01-01), Puffer

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