Dual beam X-ray thickness gauge

Details Dual beam X-ray thickness gauge Dual beam X-ray thickness gauge

1976-04-29

1977-07-19

Dixon, Harold A.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250308, G01M 2300

Patent

active

040371042

ABSTRACT:
Apparatus and method for continuous measurement of thickness of a sheet at a rolling mill or the like without contacting the sheet. A system directing radiation through the sheet in two energy bands and providing a measure of change in composition of the material as it passes the thickness gauging station. A system providing for changing the absorption coefficient of the material in the thickness measurement as a function of the change in composition so that the measured thickness is substantially independent of variations in composition.

REFERENCES:
patent: 2653247 (1953-09-01), Lundahl
patent: 3529151 (1970-09-01), Carr-Brion
patent: 3889121 (1975-06-01), Bossen

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