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Measuring apparatus using an ultrasonic wave to provide flaking state detection for a specimen on the basis of freqency analysis of a wave reflected by the specimen

  • US 5,351,544 A
  • Filed: 11/18/1991
  • Issued: 10/04/1994
  • Est. Priority Date: 11/21/1990
  • Status: Expired due to Fees
First Claim
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1. A measuring apparatus using an ultrasonic wave, comprising:

  • ultrasonic wave transmission/reception means for transmitting an ultrasonic wave pulse into a specimen, for receiving an echo wave from the specimen and for converting the echo wave, including reflected components reflected by the specimen, into an electric signal;

    extracting means for extracting reflected signal components corresponding to the reflected components from the electric signal;

    spectrum detecting means for detecting a power spectrum of the reflected signal components, extracted by said extracting means, on the basis of a Fourier-transformation; and

    flaking detecting means for detecting peaks and troughs of the power spectrum, and for then detecting a flaking of the specimen in accordance with a cycle of the peaks and troughs of the power spectrum that is detected.

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