Ultrasonic signal processing apparatus

Details Ultrasonic signal processing apparatus Ultrasonic signal processing apparatus

1981-01-12

1983-08-16

Ruehl, Charles A.

Measuring and testing

Vibration

By mechanical waves

73901, G01N 2904

Patent

active

043984231

ABSTRACT:
A defect-responsive echo signal received by a transducer for transmitting and receiving an ultrasonic pulse beam is converted into a digital echo signal by an analog-to-digital converter. The amplitude of the digital echo signal is amended with compensation data stored in correspondence with lapsed times after the ultrasonic pulse beam has been transmitted from the transducer, and an amended echo signal is delivered. The amended echo signal is applied to maximum amplitude value-memory means. First decision means compares a stored value m of the memory means and the amended echo signal delivered anew n.sub.i, and alters the stored value of the memory means to n.sub.i when n.sub.i >m holds. Second decision means compares a value m' obtained by attenuating the value m and the value n.sub.i, and delivers the stored value m of the memory means as the peak value of the defect-responsive echo when n.sub.i <m' holds and besides n.sub.i <m holds.

REFERENCES:
patent: 3872715 (1975-03-01), Pittaro
patent: 4102205 (1978-07-01), Pies et al.

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