Title:
【発明の名称】木材および木材片上の樹皮の検出およびその剥離程度の決定方法および装置
Document Type and Number:
Japanese Patent JPH05503990
Kind Code:
A
Abstract:
PCT No. PCT/SE90/00728 Sec. 371 Date May 18, 1992 Sec. 102(e) Date May 18, 1992 PCT Filed Nov. 9, 1990 PCT Pub. No. WO91/07653 PCT Pub. Date May 30, 1991.The present invention relates to a method and to an apparatus for detecting the presence of bark and for determining the barking degree of wood or chips. Accordingly, the apparatus includes a light source (12) which directs a concentrated light beam (14) onto the measurement object (16), for instance a log which is moved continuously in a transport chute (20). The shape and/or size of the light image obtained on the log (16) at the point (18) on which the light beam (14) impinges on the log is detected with the aid of a camera (10), preferably a CCD-camera. The shape and/or size of the light image is mutually different for wood and bark. The detection values obtained by the CCD-camera (10) are evaluated in a processing means.
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Inventors:
Johansson, Rennert
Ringstrom, Raif
Ringstrom, Raif
Application Number:
JP50030690A
Publication Date:
June 24, 1993
Filing Date:
November 09, 1990
Export Citation:
Assignee:
Stoffy
International Classes:
G01N21/898; G01B11/24; G01N33/34; G01N33/46; (IPC1-7): G01B11/24
Attorney, Agent or Firm:
Akira Asamura (3 outside)