Method and system for detecting and displaying defects in piping

Details Method and system for detecting and displaying defects in piping Method and system for detecting and displaying defects in piping

1997-06-30

1999-05-25

Brock, Michael

Measuring and testing

Vibration

By mechanical waves

73643, 73622, 73623, G01N 2906

Patent

active

059071001

ABSTRACT:
A detection and imaging system 10 is provided for locating defects in pipes using electromagnetic acoustical transducer (EMAT) sensors. The system includes an ultrasonic generator 22 (FIG. 2) configured to transmit a pulse signal to the EMAT transmitter 16 (FIG. 1). The transmitter 16, in turn, sends an ultrasonic wave through a pipe 13. The EMAT receiver 18 (FIG. 1) is configured to detect the transmitted ultrasonic signal 24 and receive a reflected ultrasonic signal that is reflected by a defect in the pipe. A processor is configured to generate a filter signal based upon the transmitted ultrasonic signal 24, to correlate the filter signal and the rejected ultrasonic signal to derive the location of the defect relative to the receiver, and to display the profile of the defect.

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