Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects
Patent
1982-04-12
1985-09-17
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
With means to inspect passive solid objects
2503581, 2503591, 378 55, 378 56, G01B 1502, G01T 1203
Patent
active
045422974
ABSTRACT:
This invention provides apparatus for measuring the thickness profile of steel strip comprising a radiation source reciprocally movable in a stepwise fashion across the strip width on one side thereof and a single elongated detector on the other side of the strip aligned with the scanning source. This detector may be a fluorescent scintillator which is responsive to the incident radiation, the amount of which is in turn dependent on the degree of absorption by the strip. Means are provided for sensing the degree of excitation in the detector in synchronism with the scanning source whereby to provide an output representative of the thickness profile of the strip. The profile may conveniently be displayed in analogue fashion on a television screen. A conventional thickness gauge, e.g. of the X-ray type, may conveniently be used in conjunction with the profile gauge to compensate the output of the latter for any variations in the strip thickness along the length of the coil.
REFERENCES:
patent: 3655979 (1972-04-01), Jernigan, Jr.
patent: 3781562 (1973-12-01), Singh
patent: 3868510 (1975-02-01), Murata et al.
patent: 4371897 (1983-02-01), Kramer
patent: 4467208 (1984-08-01), Muller et al.
British Steel Corporation
Hannaher Constantine
Howell Janice A.
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