Transverse vibration apparatus for grading wood panels

Details Transverse vibration apparatus for grading wood panels Transverse vibration apparatus for grading wood panels

G - Physics

01

M

73/77

G01M 7/00 (2006.01)

Patent

CA 1264019

"TRANSVERSE VIBRATION APPARATUS FOR GRADING WOOD PANELS" ABSTRACT OF THE DISCLOSURE The present invention provides an apparatus and method for establishing a measure of the modulus of elasticity of a wood panel. The apparatus comprises a support frame having a triangular array of panel support points provided thereon. A load cell, in combin- ation with one support point, is interconnected to a frequency counter. This assembly is functional to determine the weight and vibration frequency of a dropped panel. A panel lifting assembly is provided to raise and drop the panel, thereby causing it to vibrate at its natural frequency. In a process aspect, the invention involves supporting the panel at three point loci, raising and dropping the panel to cause it to vibrate at its resonant frequency, and computing a measure of stiffness from the measurements made.

509066

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