Wenderoth, Lind & Ponack
Flaw detection apparatus employing tire probes having ultrasonic oscillators mounted therein
 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 a 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 of the acquired waveform data is added together. Because a surface wave component of each waveform data has a shifted phase due to a difference in arrival times, a level of the surface wave component is offset and thus minimized through addition of the waveform data. 
Tokimec Inc.
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Yutaka Ryohei Shinichi Ryo Kinuko
Kashiwase Motegi Takeuchi Ishiyama Kato