Adapting the full matrix capture and the total focusing method to laser ultrasonics for remote non destructive testing

Theodosia Stratoudaki, Matt Clark, Paul D. Wilcox

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Laser Induced Phased Arrays (LIPAs) use post processing to focus and steer the laser generated and detected ultrasonic beam, synthesizing a phased array. The technique is broadband, non-contact, and couplant free, making LIPAs suitable for large stand-off distances, inspection of components of complex geometries and hazardous environments. This paper presents LIPAs synthesized by capturing the Full Matrix (FMC), at the nondestructive, thermoelastic regime. The Total Focusing Method (TFM) is used as the imaging algorithm, where the captured signals are summed with the appropriate time delay, in order to synthesize a focus at every point in the imaging area. The FMC and the TFM, are adapted to the needs of LIPAs in order to enable fast imaging and make more efficient use of the information in the data. Experimental results are presented from nondestructive, laser ultrasonic inspection of an aluminum sample with side drilled holes at depths varying between 10 and 20 mm from the surface.
LanguageEnglish
Title of host publicationIEEE International Ultrasonics Symposium (IUS) 2017
Place of PublicationPiscataway, NJ.
PublisherIEEE
Number of pages4
DOIs
Publication statusPublished - 6 Sep 2017
EventIEEE International Ultrasonics Symposium - Washington, United States
Duration: 6 Sep 20179 Sep 2017
http://ewh.ieee.org/conf/ius/2017/

Conference

ConferenceIEEE International Ultrasonics Symposium
Abbreviated titleIEEE IUS 2017
CountryUnited States
CityWashington
Period6/09/179/09/17
Internet address

Fingerprint

Nondestructive examination
Ultrasonics
Lasers
Imaging techniques
Inspection
Time delay
Aluminum
Geometry
Processing

Keywords

  • laser ultrasonics
  • phased arrays
  • remote sensing
  • nondestructive testing

Cite this

Stratoudaki, Theodosia ; Clark, Matt ; Wilcox, Paul D. / Adapting the full matrix capture and the total focusing method to laser ultrasonics for remote non destructive testing. IEEE International Ultrasonics Symposium (IUS) 2017. Piscataway, NJ. : IEEE, 2017.
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abstract = "Laser Induced Phased Arrays (LIPAs) use post processing to focus and steer the laser generated and detected ultrasonic beam, synthesizing a phased array. The technique is broadband, non-contact, and couplant free, making LIPAs suitable for large stand-off distances, inspection of components of complex geometries and hazardous environments. This paper presents LIPAs synthesized by capturing the Full Matrix (FMC), at the nondestructive, thermoelastic regime. The Total Focusing Method (TFM) is used as the imaging algorithm, where the captured signals are summed with the appropriate time delay, in order to synthesize a focus at every point in the imaging area. The FMC and the TFM, are adapted to the needs of LIPAs in order to enable fast imaging and make more efficient use of the information in the data. Experimental results are presented from nondestructive, laser ultrasonic inspection of an aluminum sample with side drilled holes at depths varying between 10 and 20 mm from the surface.",
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Stratoudaki, T, Clark, M & Wilcox, PD 2017, Adapting the full matrix capture and the total focusing method to laser ultrasonics for remote non destructive testing. in IEEE International Ultrasonics Symposium (IUS) 2017. IEEE, Piscataway, NJ., IEEE International Ultrasonics Symposium, Washington, United States, 6/09/17. https://doi.org/10.1109/ULTSYM.2017.8092900

Adapting the full matrix capture and the total focusing method to laser ultrasonics for remote non destructive testing. / Stratoudaki, Theodosia; Clark, Matt; Wilcox, Paul D.

IEEE International Ultrasonics Symposium (IUS) 2017. Piscataway, NJ. : IEEE, 2017.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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