Patent ID: 7966134
Filing Date: 2011-06-21
Classification: G01N,H03H

Abstract:
1. A system for determining a value of one or more elastic properties of a material, the system using input signals comprising a first input signal representative of a driving force exerted on the material by an actuator at a driving-point; a second input signal representative of a driving-point velocity corresponding to the driving force; and a third input signal representative of a driving-point displacement corresponding to the driving force, the system comprising: (a) a generator for generating a basis function signal for each basis function term of a differential equation model of the motion of the driving-point, wherein at least one basis function term comprises a function of the second input signal, and at least one basis function term comprises a function of the third input signal; and (b) a processor which uses a fitting process for determining coefficients of a linear combination of the basis function signals which fits the first input signal, wherein at least one of the determined coefficients is representative of the value of one or more elastic properties of the material.