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Title: Nondestructive inspection using continuous ultrasonic wave generation

Abstract

Methods and apparatus are disclosed for analyzing structures by applying a continuous ultrasonic excitation and measuring steady state response of the structures using laser Doppler vibrometery, or other techniques. In one example, a method comprises applying a continuous signal having one or more periodic tones to the structure, generating measurements of wave response to the signal at each of a plurality of inspection points of the structure, and, for each of the periodic tones, estimating wavenumbers for a number of the inspection points of the structure based on the wave response measurements and the frequency of the periodic tones. The estimated wavenumbers can be used to determine properties of the structure, including defects, damage, or variation in thickness.

Inventors:
; ;
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600157
Patent Number(s):
10444202
Application Number:
14/688,854
Assignee:
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: 04/16/2015
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Flynn, Eric B., Farrar, Charles R., and Jarmer, Gregory James Sylvester. Nondestructive inspection using continuous ultrasonic wave generation. United States: N. p., 2019. Web.
Flynn, Eric B., Farrar, Charles R., & Jarmer, Gregory James Sylvester. Nondestructive inspection using continuous ultrasonic wave generation. United States.
Flynn, Eric B., Farrar, Charles R., and Jarmer, Gregory James Sylvester. Tue . "Nondestructive inspection using continuous ultrasonic wave generation". United States. https://www.osti.gov/servlets/purl/1600157.
@article{osti_1600157,
title = {Nondestructive inspection using continuous ultrasonic wave generation},
author = {Flynn, Eric B. and Farrar, Charles R. and Jarmer, Gregory James Sylvester},
abstractNote = {Methods and apparatus are disclosed for analyzing structures by applying a continuous ultrasonic excitation and measuring steady state response of the structures using laser Doppler vibrometery, or other techniques. In one example, a method comprises applying a continuous signal having one or more periodic tones to the structure, generating measurements of wave response to the signal at each of a plurality of inspection points of the structure, and, for each of the periodic tones, estimating wavenumbers for a number of the inspection points of the structure based on the wave response measurements and the frequency of the periodic tones. The estimated wavenumbers can be used to determine properties of the structure, including defects, damage, or variation in thickness.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

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