Method and system for controlling the integrated health of a mechanical structure by diffuse elastic waves
US11460450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2017 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Aug 13, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2694
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for monitoring the structural health of a structure that supports guided propagation modes of elastic waves, includes the following steps:a) acquiring an ambient noise propagating through the structure by means of at least one pair of non-collocated elastic-wave sensors; b) estimating a function representative of an impulse response of the structure for elastic propagation between the constituent sensors of said pair; c) extracting at least one dispersion curve of the elastic propagation through the structure by time-frequency analysis of this function representative of an impulse response; and d) estimating at least one parameter indicative of a mechanical property of a constituent material of the structure from the dispersion curve obtained in step c). A system for implementing such a method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.