Patent ID: 7707896
Filing Date: 2010-05-04
Classification: G01B,G01J,G01K,G01R,G05D

Abstract:
1. A method for monitoring the net dimensional changes in a free length L of a resilient element, the free length L of the resilient element extending along the resilient element between opposing end definition points, and a separation S between a pair of non-compliant stops, the method comprising the steps of: constraining the end definition points of the resilient element between the non-compliant stops that constrain the free length L of the resilient element at a separation S that is less than L so as to cause the resilient element to bow and create a displacement m of a central region of the resilient element with respect to a line intersecting the end definition points, restricting the flexure of the resilient element with respect to its thickness such that the resilient element does not exceed its elastic limit in use; monitoring the change in the displacement m of the central region of the resilient element with respect to the line intersecting the end definition points, this change resulting from bowing of the resilient element; and correlating the change in displacement m resulting from change in bowing to a net change in the free length L and the separation S.