Measuring apparatus using an ultrasonic wave to provide flaking

Details Measuring apparatus using an ultrasonic wave to provide flaking Measuring apparatus using an ultrasonic wave to provide flaking

1991-11-18

1994-10-04

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73602, 73609, 73613, G01N 2912

Patent

active

053515447

ABSTRACT:
A measuring apparatus using an ultrasonic wave according to the invention transmits an ultrasonic wave pulse into a specimen, receives the echo reflected by the specimen and converts it into an electric signal. The components of the electric signal that represent the wave reflected by the specimen and contain data on the state of the specimen are extracted by a gate circuit. The components obtained by the gate circuit are converted into a power spectrum by a circuit for performing a Fourier transformation. The thickness of the specimen and/or the flaking state of the specimen can be determined from this power spectrum.

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