| 摘要 |
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. |
