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

doi:10.1109/ULTSYM.2017.8092900

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

Electronic And Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

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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.

Original language	English
Title of host publication	IEEE International Ultrasonics Symposium (IUS) 2017
Place of Publication	Piscataway, NJ.
Publisher	IEEE
Number of pages	4
DOIs	https://doi.org/10.1109/ULTSYM.2017.8092900
Publication status	Published - 6 Sep 2017
Event	2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States Duration: 6 Sep 2017 → 9 Sep 2017 http://ewh.ieee.org/conf/ius/2017/

Conference

Conference	2017 IEEE International Ultrasonics Symposium, IUS 2017
Abbreviated title	IEEE IUS 2017
Country	United States
City	Washington
Period	6/09/17 → 9/09/17
Internet address	http://ewh.ieee.org/conf/ius/2017/

Keywords

laser ultrasonics
phased arrays
remote sensing
nondestructive testing

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Stratoudaki-etal-IUS-2017-total-focusing-method-to-laser-ultrasonics-for-remote-non-destructive-testingAccepted author manuscript, 2.74 MB

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

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.",

keywords = "laser ultrasonics, phased arrays, remote sensing, nondestructive testing",

author = "Theodosia Stratoudaki and Matt Clark and Wilcox, {Paul D.}",

note = "(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.; 2017 IEEE International Ultrasonics Symposium, IUS 2017, IEEE IUS 2017 ; Conference date: 06-09-2017 Through 09-09-2017",

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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., 2017 IEEE International Ultrasonics Symposium, IUS 2017, Washington, United States, 6/09/17. https://doi.org/10.1109/ULTSYM.2017.8092900

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AU - Stratoudaki, Theodosia

AU - Clark, Matt

AU - Wilcox, Paul D.

N1 - (c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2017/9/6

Y1 - 2017/9/6

N2 - 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.

AB - 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.

KW - laser ultrasonics

KW - phased arrays

KW - remote sensing

KW - nondestructive testing

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DO - 10.1109/ULTSYM.2017.8092900

M3 - Conference contribution book

BT - IEEE International Ultrasonics Symposium (IUS) 2017

PB - IEEE

CY - Piscataway, NJ.

T2 - 2017 IEEE International Ultrasonics Symposium, IUS 2017

Y2 - 6 September 2017 through 9 September 2017

ER -

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

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