Automatic lumber sorting

Details Automatic lumber sorting Automatic lumber sorting

1998-05-06

2000-06-06

Johns, Andrew W.

Image analysis

Applications

Animal, plant, or food inspection

382141, 209518, G06K 900

Patent

active

060728906

ABSTRACT:
To facilitate separation of lumber pieces that are of different species, an indicator liquid is sprayed on to a fresh cut end of each lumber piece to produce a characteristic reaction, e.g. based upon pH. After a suitable interval the coated ends of the lumber pieces are optically scanned, the scanned image being analyzed spectrographically to identify the species of the lumber piece, e.g. as between spruce and fir. The lumber pieces are separated accordingly so that further processing thereof, e.g. kiln drying can be done under optimal conditions for that species.

REFERENCES:
patent: 4934228 (1990-06-01), Bolton et al.
patent: 4992949 (1991-02-01), Arden
patent: 5006225 (1991-04-01), Beauchemin et al.
patent: 5071771 (1991-12-01), Barbour et al.
patent: 5674335 (1997-10-01), Aman et al.
patent: 5761070 (1998-06-01), Conners et al.
"Separation of Eastern Spruce and Balsam Fir by Chemical Methods", Kutscha, Lomerson and Dyer, Wood Science and Technology, 1978.

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