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Nondestructive inspection using continuous ultrasonic wave generation

Patent ·
OSTI ID:1600157
; ;
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.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-06NA25396
Assignee:
Triad National Security, LLC (Los Alamos, NM)
Patent Number(s):
10,444,202
Application Number:
14/688,854
OSTI ID:
1600157
Country of Publication:
United States
Language:
English

References (11)

Characterization of Rotating Structures in Coast-down by means of Continuous Tracking Laser Doppler Vibrometer book August 2025
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Characterization of impact damage in composite laminates using guided wavefield imaging and local wavenumber domain analysis journal September 2013
Depth-profiling of elastic inhomogeneities in transparent nanoporous low-k materials by picosecond ultrasonic interferometry journal August 2009
Experimental Modal Analysis on a Rotating Fan Using Tracking-CSLDV
  • Gasparoni, Andrea; Allen, Matthew S.; Yang, Shifei
  • 9TH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER AND NON-CONTACT TECHNIQUES AND SHORT COURSE, AIP Conference Proceedings https://doi.org/10.1063/1.3455482
conference January 2010
Performance analysis of continuous tracking laser Doppler vibrometry applied to rotating structures in coast-down journal April 2012
Repeat scanning technology for laser ultrasonic propagation imaging journal June 2013
Frequency–wavenumber domain filtering for improved damage visualization journal October 2007
Frequency-wavenumber domain methods for analysis of incident and scattered guided wave fields
  • Michaels, Thomas E.; Ruzzene, Massimo; Michaels, Jennifer E.
  • SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, SPIE Proceedings https://doi.org/10.1117/12.816046
conference March 2009
Surface wave measurements using a single continuously scanning laser Doppler vibrometer: Application to elastography journal March 2013
Laser Doppler Vibrometry for Structural Dynamic Characterization of Rotating Machinery journal September 2013

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Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS