Flow detection apparatus employing tire probes having ultrasonic

Details Flow detection apparatus employing tire probes having ultrasonic Flow detection apparatus employing tire probes having ultrasonic

1994-11-08

1997-02-11

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73622, 73619, 73639, 73641, G01N 2906, G01N 2910, G01N 2926

Patent

active

056023367

ABSTRACT:
An apparatus for detecting flaws using supersonic waves measures a thickness of a test object or a position of a cavity inside the test object by employing pair of ultrasonic probes. By changing a relative position of one ultrasonic probe to that of the other ultrasonic probe, a plurality of waveform data of ultrasonic reception signals is acquired. Each acquired waveform data is added per corresponding unit of time. Since a surface wave component of each waveform data has a shifted phase due to the difference in arrival time, a level of the surface wave component is offset and thus minimized through addition of the waveform data.

REFERENCES:
patent: 2937522 (1960-05-01), McGaughey
patent: 3715482 (1973-02-01), Haines et al.
patent: 3774203 (1973-11-01), Dooley
patent: 4070643 (1978-01-01), Green
patent: 4167879 (1979-09-01), Pedersen
patent: 5406849 (1995-04-01), Drescher-Krasicka et al.

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