Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2011-08-16
2011-08-16
Saint Surin, J M (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S579000, C073S599000, C073S602000, C702S039000, C702S056000
Reexamination Certificate
active
07997139
ABSTRACT:
A method for the nondestructive inspecting of coated or uncoated pipeline, using ultrasonic guided waves excited on the outer or inner pipe surface, wherein at least one or more transducers are individually or simultaneously excited to generate ultrasound, wherein multiple received signals with different focal spot positions are processed and combined to produce a reduced number of final waveforms that show defect axial positions in the pipe, wherein a data calibration scheme is utilized to adjust velocity variability for all the guided wave modes at different frequencies, and wherein the hardware arrangement has at least one pulser channel and one receiver channel for the collection and storage of signals.
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Owens Steven E.
Rose Joseph L.
Zhang Li
Duane Morris LLP
FBS, Inc.
M Saint Surin J
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