Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2005-10-25
2005-10-25
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S628000, C073S641000, C600S448000
Reexamination Certificate
active
06957583
ABSTRACT:
An ultrasonic inspection instrument for detecting a crack and performing sizing in the depth direction of the crack. By a transmitter element array and a receiver element array included in a common sensor, focus points between focused acoustic fields are electronically scanned in a range including a location where half the sum of the transmitting angle of ultrasonic waves to an inspection-target material and the receiving angle of diffraction echoes from the inspection-target material is 30 degrees, so that a tip portion of the crack is detected from the received diffraction echoes. Thus, the detectability of the ultrasonic inspection instrument for detecting diffraction waves in a subject to be inspected and performing crack inspection is stabilized and kept high.
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Adachi Hirokazu
Koike Masahiro
Kono Naoyuki
Matsui Tetsuya
Senoo Makoto
Hitachi , Ltd.
McDermott Will & Emery LLP
Saint-Surin Jacques M.
Williams Hezron
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