Apparatus for ultrasonic examination

Details Apparatus for ultrasonic examination Apparatus for ultrasonic examination

1978-02-14

1979-09-25

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73620, G01N 2904

Patent

active

041686292

ABSTRACT:
In apparatus for ultrasonic examination of an object, the echoes derived at successive positions of an ultrasonic transducer are digitized and subtracted one from the other. If the echoes are not the same, the difference is a discrete indication of a flaw. The invention applies especially to the detection of flaws close to the front surface of the object where the front surface echo tends to obscure nearby flaws.

REFERENCES:
patent: 3856985 (1974-12-01), Yokoi et al.
patent: 3857052 (1974-12-01), Beller

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