Patent ID: 6606147
Filing Date: 2003-08-12
Classification: G01B

Abstract:
A measuring method using photoelastic analysis for finding a touching point between a ball and track profile comprising the steps of:a. setting an object under measurement on a photoelastic instrument; b. setting a photoelastic plate at least containing a semi-circular profiled section on the track surface of said object, said semi-circularly profiled section having a radius of curvature equal to that of a rolling ball; c. applying a load on said photoelastic plate, said semi-circularly profiled section being thereby forced to contact the track surface of said object under measurement; d. capturing an image of said photoelastic plate with an image capturing device; e. analyzing said image so as to determine the center of said semi-circularly profiled section, and finding the contact position between said photoelastic plate and said object; and f. determining a contact relation between said ball and said track surface from said contact position and said center.