05537876 is referenced by 37 patents and cites 1 patents.

Apparatus and method for nondestructive evaluation of butt welds. The present invention in its broadest form includes an apparatus and method for detecting flaws in butt welds in steel sheets using horizontal shear ultrasonic waves generated on the surface thereof. Observation of reflected waves having amplitude greater than a chosen value signals the presence of significant flaw. To achieve this objective, the present apparatus detects only reflected horizontal shear waves; other modes are electronically removed using bandpass filters, since they occur at different frequencies. The invention may therefore be used in the presence of surface structures such as clamps and the like, and in the presence of surface nonuniformities in the vicinity of the weld, thereby permitting on-line flaw detection steel mill environment without interfering with the line output. The ultrasonic waves are generated and received by a pair of electromagnetic acoustical transducers having magnetic fields which are oriented 40-65 degrees from the direction of the transmitted and received waves.

Title
Apparatus and method for nondestructive evaluation of butt welds
Application Number
8/285391
Publication Number
5537876
Application Date
August 2, 1994
Publication Date
July 23, 1996
Inventor
Leigh R Burns Jr
104 Kenneth, Troy, 62294
IL, US
Robert B Thompson
3212 Kingman, Ames, 50011
IA, US
George A Alers
1209 Harrison Ct., Boulder, 80303
CO, US
Paul K Davidson
1400 Lafayette, NE., Albuquerque, 87106
NM, US
Agent
Samuel M Freund
IPC
G01N 29/10
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