G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 3/20 (2006.01) G01N 3/10 (2006.01) G01N 3/26 (2006.01) G01N 3/40 (2006.01) G01N 33/46 (2006.01) G01N 3/00 (2006.01)
Patent
CA 2427818
An apparatus for testing stiffness characteristics of an article such as a piece of lumber moving in a conveying direction transverse to the testing axis, comprises a bearing unit capable of contacting the article at two spaced apart portions thereof. A first deflecting unit includes a first working element applying a first thrust against a loaded area on the article at an intermediary portion thereof located between the spaced apart portions, to produce an article deflection of a first magnitude. Each working element defines a loading surface extending substantially parallel to the article-conveying path. A second deflecting unit includes a second working element for applying a second thrust against a loaded area of the article intermediary portion, to produce an article deflection of a second magnitude. Load cells coupled to the bearing unit generates signals indicative of respective magnitudes of the thrusts, from which a computer derives stiffness indication.
Beauchemin Gratien
Campagna Jean
Dupont Danick
Labbe Jacques
Ouellet Jean-Claude
Boudreau Jean-Claude
Centre de Recherche Industrielle Du Quebec
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