Measuring and testing – Vibration – By mechanical waves
Patent
1987-10-05
1989-04-18
Tokar, Michael J.
Measuring and testing
Vibration
By mechanical waves
73628, G01N 2904
Patent
active
048215759
ABSTRACT:
A method for ultrasonically detecting flaws in a welded portion of a pipe by using an ultrasonic wave phased array probe having an array of a plurality of transducer elements for emitting and receiving ultrasonic wave beams, wherein at least one monitoring probe is located in the vicinity of the welded portion to receive the ultrasonic wave beam, whereby peak values of the ultrasonic wave beams are detected within a predetermined gate, a maximum peak value of the detected peak values is determined to determine a pilot beam having the maximum peak value, and effective beams which reach the portion of the welding portion to be tested are determined from the determined pilot beam.
REFERENCES:
patent: 4160386 (1979-07-01), Jackson
patent: 4195530 (1980-04-01), Ross et al.
patent: 4206511 (1980-06-01), Ries et al.
patent: 4660419 (1987-04-01), Derkacs et al.
Fujikake Yoichi
Sugimoto Takao
Tamaki Kiyohide
Udagawa Yoshio
Fess Lawrence G.
Nippon Steel Corporation
Tokar Michael J.
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