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Title: Simple Models and Methods for Estimating the UltrasonicReflectivity of Spot Welds

Abstract

This paper describes models and methods for estimating theacoustic reflectivity of the welded interfaces between spot-welded sheetsfrom normal-incidence pulse-echo ultrasound signals. The simple geometryof the problem allows an abstraction that does not resort to complex waveequations. Instead, a reflectivity model predicts the timing andamplitude of the echoes arriving at the probe. This reflectivity model isnested in a signal processing model; recovering reflectivity firstrequires deconvolution to recover discrete impulses from the probesignal, then processing these with the reflectivity model. Reflectivitymaps of spot welds generated with this model show promise for predictingweld quality.

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE. Assistant Secretary for Energy Efficiency andRenewable Energy. Vehicle Technologies
OSTI Identifier:
922850
Report Number(s):
LBNL-61835
R&D Project: 611103; BnR: VT0502010; TRN: US200804%%1236
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: 2006 Annual Review of Process in QuantitativeNondestructive Evaluation, Portland, Oregon, 7/30-8/04,2006
Country of Publication:
United States
Language:
English
Subject:
42; ACOUSTICS; AMPLITUDES; EVALUATION; GEOMETRY; PROBES; PROCESSING; REFLECTIVITY; ULTRASONIC WAVES; WAVE EQUATIONS; WELDED JOINTS; Ultrasound Signal Processing Spot Weld Inspection

Citation Formats

Davis, William B. Simple Models and Methods for Estimating the UltrasonicReflectivity of Spot Welds. United States: N. p., 2006. Web.
Davis, William B. Simple Models and Methods for Estimating the UltrasonicReflectivity of Spot Welds. United States.
Davis, William B. 2006. "Simple Models and Methods for Estimating the UltrasonicReflectivity of Spot Welds". United States. https://www.osti.gov/servlets/purl/922850.
@article{osti_922850,
title = {Simple Models and Methods for Estimating the UltrasonicReflectivity of Spot Welds},
author = {Davis, William B},
abstractNote = {This paper describes models and methods for estimating theacoustic reflectivity of the welded interfaces between spot-welded sheetsfrom normal-incidence pulse-echo ultrasound signals. The simple geometryof the problem allows an abstraction that does not resort to complex waveequations. Instead, a reflectivity model predicts the timing andamplitude of the echoes arriving at the probe. This reflectivity model isnested in a signal processing model; recovering reflectivity firstrequires deconvolution to recover discrete impulses from the probesignal, then processing these with the reflectivity model. Reflectivitymaps of spot welds generated with this model show promise for predictingweld quality.},
doi = {},
url = {https://www.osti.gov/biblio/922850}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {10}
}

Conference:
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