TV fatigue crack monitoring system

Details TV fatigue crack monitoring system TV fatigue crack monitoring system

1976-07-20

1977-12-13

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 718

Patent

active

040632822

ABSTRACT:
An apparatus is disclosed for monitoring the development and growth of fatigue cracks in a test specimen subjected to a pulsating tensile load. A plurality of television cameras photograph a test specimen which is illuminated at the point of maximum tensile stress. The television cameras have a modified vidicon tube which has an increased persistence time thereby eliminating flicker in the displayed images.

REFERENCES:
patent: 2164125 (1939-06-01), Sokoloff
patent: 2798605 (1957-07-01), Richards
patent: 3256386 (1966-06-01), Morchand

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