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Selection of Shear Horizontal Wave Transducers for Robotic Nondestructive Inspection in Harsh Environments

Journal Article · · Sensors
DOI:https://doi.org/10.3390/s17010005· OSTI ID:2370578
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Harsh environments and confined spaces require that nondestructive inspections be conducted with robotic systems. Ultrasonic guided waves are well suited for robotic systems because they can provide efficient volumetric coverage when inspecting for various types of damage, including cracks and corrosion. Shear horizontal guided waves are especially well suited for robotic inspection because they are sensitive to cracks oriented perpendicular or parallel to the wave propagation direction and can be generated with electromagnetic acoustic transducers (EMATs) and magnetostrictive transducers (MSTs). Both types of transducers are investigated for crack detection in a stainless steel plate. The MSTs require the robot to apply a compressive normal force that creates frictional force coupling. However, the coupling is observed to be very dependent upon surface roughness and surface debris. The EMATs are coupled through the Lorentz force and are thus noncontact, although they depend on the lift off between transducer and substrate. After comparing advantages and disadvantages of each transducer for robotic inspection the EMATs are selected for application to canisters that store used nuclear fuel.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NE0008266
OSTI ID:
2370578
Journal Information:
Sensors, Journal Name: Sensors Journal Issue: 1 Vol. 17; ISSN SENSC9; ISSN 1424-8220
Publisher:
MDPI AGCopyright Statement
Country of Publication:
Switzerland
Language:
English

References (9)

Magnetostrictive sensor technology and its applications journal February 1998
Chloride-induced stress corrosion cracking of used nuclear fuel welded stainless steel canisters: A review journal November 2015
Weld defect detection using PPM EMAT generated shear horizontal ultrasound journal September 2015
Inspection of Austenitic weld with Emats conference January 2010
In-Line Corrosion Inspection Using Circumferential and Longitudinal Ultrasonic Guided Waves conference January 2011
Study and comparison of different EMAT configurations for SH wave inspection journal December 2011
Robotic Inspection of Dry Storage Casks for Spent Nuclear Fuel conference July 2016
Scattering of the fundamental shear horizontal mode in a plate when incident at a through crack aligned in the propagation direction of the mode journal November 2008
Managing Aging Effects on Dry Cask Storage Systems for Extended Long-Term Storage and Transportation of Used Fuel (REV. 2) report September 2014

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