Crack development measuring equipment

Details Crack development measuring equipment Crack development measuring equipment

1980-08-19

1982-12-14

Wise, Edward J.

Boots, shoes, and leggings

358105, 358106, H04N 718

Patent

active

043641130

ABSTRACT:
The measuring equipment is used for the optical monitoring of cracks in mrial test pieces, which are loaded by a loading device. A television camera trained on the test piece is connected to a discriminator which converts the image points of the television image into binary pulses. The binary pulses of the television image are stored from time to time in a store. A comparator compares the contents of the store with the binary pulses of a consecutive television image and ascertains deviations between two consecutively-taken television images. The number of the non-coincident binary pulses of the compared television images is counted and indicated.

REFERENCES:
patent: 4063282 (1977-12-01), Exton
patent: 4136950 (1979-01-01), Labrum et al.
patent: 4163991 (1979-08-01), Burrig
patent: 4185298 (1980-01-01), Billet et al.
patent: 4219847 (1980-08-01), Pinkney et al.
patent: 4240109 (1980-12-01), Michael et al.
patent: 4245243 (1981-01-01), Gutjahr et al.
patent: 4249212 (1981-02-01), Ito et al.

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