Automatic ultrasonic testing method

Details Automatic ultrasonic testing method Automatic ultrasonic testing method

1987-12-01

1989-01-24

Chapman, John

Measuring and testing

Vibration

By mechanical waves

73629, G01N 2904

Patent

active

047993871

ABSTRACT:
In an automatic ultrasonic testing method for automatically detecting an internal flaw of articles such as a solid-core station post insulator and a long-rod insulator in which ultrasonic noises are liable to be generated in ultrasonic testing waveform, use is made of a standard waveform having a plurality of maximum peak hold data in predetermined intervals at all the detecting points and obtained by detecting the normal article including the ultrasonic noises, with which ultrasonic testing waveforms of an article to be tested are compared. Therefore, it is possible to eliminate an instability of the ultrasonic testing waveform and to detect a flaw echo having a level lower than that of the ultrasonic noises.

REFERENCES:
patent: 3940952 (1976-03-01), Mitchell
patent: 4170143 (1979-10-01), Ries et al.

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