Dynamic hardness testing using measurement of the scarton dynami

Details Dynamic hardness testing using measurement of the scarton dynami Dynamic hardness testing using measurement of the scarton dynami

1995-02-14

1998-09-08

Raevis, Robert

Measuring and testing

Hardness

By penetrator or indentor

G01N 330

Patent

active

058047077

ABSTRACT:
A method and apparatus for determining the degree of dynamic hardness of a material, such as a sporting equipment item. The method includes the steps of impulsively exciting a surface of the material by impacting the surface against a second, relatively hard surface in contact with a force-measuring device, and then measuring a signal from the force-measuring device to determine a frequency-dependent spectrum of the force exerted by the excited surface on the second surface. From this data, a roll-off frequency is measured and then analyzed to determine the degree of dynamic hardness of the material.

REFERENCES:
patent: 465505 (1891-12-01), Weser
patent: 4080863 (1978-03-01), Groeschel
patent: 5079728 (1992-01-01), Adams et al.
patent: 5285687 (1994-02-01), Ringel et al.
patent: 5365457 (1994-11-01), Madigosky
patent: 5537862 (1996-07-01), Scarton et al.
patent: 5691473 (1997-11-01), Peleg

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