Title:
SYSTEMS AND METHODS TO DETERMINE ELASTIC PROPERTIES OF MATERIALS
Document Type and Number:
WIPO Patent Application WO2005098731
Kind Code:
A3
Abstract:
The present invention provides systems and methods to use a measured driving-point response of a nonlinear material to determine one or more elastic properties of the material. The present invention takes advantage of the full information represented by the transient component, the steady-state component, the anharmonic components, and the nonlinear response components of a measured driving-point response of a real nonlinear material, without limitation in the use of large-amplitude forces. The elastic properties are determined by forming and solving a time-domain system of linear equations representing a differential equation model of the driving-point motions of the material. Based on a single, short duration, large-amplitude driving point measurement, both linear and nonlinear properties can be determined; both large-amplitude and nearzero amplitude properties can be determined; and elastic-wave speed and elastic moduli and their variation with depth can be determined. The present invention also provides a system and a method to filter an input signal to either attenuate or preserve each of one or more selected harmonic components that are harmonics of a phase reference signal.
Inventors:
GERMAN PETER T (US)
Application Number:
PCT/US2005/010272
Publication Date:
August 10, 2006
Filing Date:
March 29, 2005
Export Citation:
Assignee:
GERMAN PETER T (US)
International Classes:
G06F19/00; G01N3/30; G01N3/48; G01V1/30; H03H17/02; G01N3/00; G01N3/02
Foreign References:
| US5495763A | 1996-03-05 | |||
| US6289734B1 | 2001-09-18 |
Other References:
See also references of EP 1735732A4
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