Method for distinguishing between interfering signals and signal

Details Method for distinguishing between interfering signals and signal Method for distinguishing between interfering signals and signal

1983-01-04

1985-04-16

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73614, 73615, G01N 2904

Patent

active

045108110

ABSTRACT:
In order to safely interfering signals caused by interfering volumina like e.g. air bubbles existing in a coupling medium from signals generated by workpiece defects in the ultrasonic testing of workpieces according to the pulse-echo-method, it is suggested that at the appearance of a signal in the time between transmitting pulse and surface echo-signal crossing an adjustable threshold during a test cycle, all signals of the same test cycle falling within the range of anticipation for workpiece defects will be suppressed.

REFERENCES:
patent: 3608363 (1971-09-01), Whittington
patent: 3690156 (1972-09-01), Robinson
patent: 3929006 (1975-12-01), Boggs
patent: 4147065 (1979-04-01), Lather et al.
patent: 4150577 (1979-04-01), Fetheroff

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