Invention Grant
- Patent Title: Method and system for controlling the integrated health of a mechanical structure by diffuse elastic waves
-
Application No.: US16469625Application Date: 2017-12-15
-
Publication No.: US11460450B2Publication Date: 2022-10-04
- Inventor: Tom Druet , Bastien Chapuis , Emmanuel Moulin
- Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
- Applicant Address: FR Paris
- Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
- Current Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
- Current Assignee Address: FR Paris
- Agency: BakerHostetler
- Priority: FR1662485 20161215
- International Application: PCT/EP2017/083000 WO 20171215
- International Announcement: WO2018/109159 WO 20180621
- Main IPC: G01N29/50
- IPC: G01N29/50 ; G01M5/00 ; G01N29/14 ; G01M11/08 ; G01H9/00 ; G01H11/08
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.
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.
Public/Granted literature
Information query
