Recognizing ultrasonic response signals during testing of struct

Details Recognizing ultrasonic response signals during testing of struct Recognizing ultrasonic response signals during testing of struct

1977-08-11

1979-10-09

Myracle, Jerry W.

Measuring and testing

Vibration

By mechanical waves

73629, G01N 2904

Patent

active

041701437

ABSTRACT:
Ultrasonic response signals resulting from interaction of a test pulse with the structural material are recognized by dynamically tracking the noise level and adding thereto a fixed level; a response signal to be recognized must exceed the resulting variable threshold level.

REFERENCES:
patent: 3482434 (1969-12-01), Cowan et al.
patent: 3813926 (1974-06-01), Stubbeman

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