Ultrasonic inspection device

Details Ultrasonic inspection device Ultrasonic inspection device

1977-01-31

1977-12-27

Ruehl, Charles A.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

040647420

ABSTRACT:
A clock circuit comprising a synchronizable voltage controlled oscillator in combination with a programmable address means, which address means is adjusted commensurate with the acoustic velocity of the workpiece, provides clock pulses from the oscillator having a stable and accurate acoustic velocity dependent frequency. An entrant surface responsive electrical signal responsive to an ultrasonic search signal entering the workpiece is also provided to the clock circuit for assuring that the clock pulses are synchronized with the receipt of the electrical signal.

REFERENCES:
patent: 3713329 (1973-12-01), Munger
patent: 3914986 (1975-10-01), Ota et al.
patent: 3985022 (1976-10-01), Dileo et al.

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