Simple Models and Methods for Estimating the UltrasonicReflectivity of Spot Welds
Conference
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OSTI ID:922850
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.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE. Assistant Secretary for Energy Efficiency andRenewable Energy. Vehicle Technologies
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 922850
- Report Number(s):
- LBNL-61835; R&D Project: 611103; BnR: VT0502010; TRN: US200804%%1236
- 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
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