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Title: Detection, monitoring, and determination of location of changes in metallic structures using multimode acoustic signals

Abstract

Methods for detection, monitoring, and determination of location of changes in rigid structures with arbitrarily complex geometries are described. Implementations include locating acoustic transducers that generate and receive acoustic signals at multiple locations along a surface of the rigid structure, wherein longitudinal spacing between the transducer locations define measurement zones. Acoustic signals with chosen amplitude-time-frequency characteristics excite multiple vibration modes in the structure within each zone. Small mechanical changes in the inspection zones lead to scattering and attenuation of broadband acoustic signals, which are detectable as changes in received signal characteristics as part of a through-transmission technique. Additional use of short, narrowband pulse acoustic signals as part of a pulse-echo technique allows determination of the relative location of the mechanical change within each zone based on the differential delay profiles.

Inventors:
; ;
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1637869
Patent Number(s):
10585069
Application Number:
15/964,967
Assignee:
Chevron U.S.A. Inc. (San Ramon, CA); Triad National Security, LLC (Los Alamos, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Patent
Resource Relation:
Patent File Date: 04/27/2018
Country of Publication:
United States
Language:
English

Citation Formats

Findikoglu, Alp T., Sinha, Dipen N., and Chapman, Daniel R. Detection, monitoring, and determination of location of changes in metallic structures using multimode acoustic signals. United States: N. p., 2020. Web.
Findikoglu, Alp T., Sinha, Dipen N., & Chapman, Daniel R. Detection, monitoring, and determination of location of changes in metallic structures using multimode acoustic signals. United States.
Findikoglu, Alp T., Sinha, Dipen N., and Chapman, Daniel R. Tue . "Detection, monitoring, and determination of location of changes in metallic structures using multimode acoustic signals". United States. https://www.osti.gov/servlets/purl/1637869.
@article{osti_1637869,
title = {Detection, monitoring, and determination of location of changes in metallic structures using multimode acoustic signals},
author = {Findikoglu, Alp T. and Sinha, Dipen N. and Chapman, Daniel R.},
abstractNote = {Methods for detection, monitoring, and determination of location of changes in rigid structures with arbitrarily complex geometries are described. Implementations include locating acoustic transducers that generate and receive acoustic signals at multiple locations along a surface of the rigid structure, wherein longitudinal spacing between the transducer locations define measurement zones. Acoustic signals with chosen amplitude-time-frequency characteristics excite multiple vibration modes in the structure within each zone. Small mechanical changes in the inspection zones lead to scattering and attenuation of broadband acoustic signals, which are detectable as changes in received signal characteristics as part of a through-transmission technique. Additional use of short, narrowband pulse acoustic signals as part of a pulse-echo technique allows determination of the relative location of the mechanical change within each zone based on the differential delay profiles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {3}
}

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