Dual head measuring techniques for radiation gaging of reinforci

Details Dual head measuring techniques for radiation gaging of reinforci Dual head measuring techniques for radiation gaging of reinforci

1981-04-15

1984-01-10

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

356385, 378 55, 378 59, G01N 2300, G01B 1104

Patent

active

044255055

ABSTRACT:
A continuously measuring on-line production gage calibrated to indicate bar weight per foot and unaffected by typical reinforcing bar shape variability utilizes two radiation gages with their measuring axes separated by 90 degrees and offset by 45 degrees from the rib plane of the reinforcing bar. Each gage is equipped with a shutter which may be adjusted electrically to simulate any required weight per foot standard and with the gage zeroing on a predetermined shutter setting, the shutter automatically opens and radiation detector signal variations from the zero point are amplified, linearized, averaged, and scaled electronically to produce a percent weight per foot output signal. Summation of detected radiation is also performed through use of optical fibers.

REFERENCES:
patent: 3715592 (1973-02-01), Busch et al.
patent: 3832550 (1974-04-01), Bartlett et al.
patent: 3835323 (1974-09-01), Kahil
patent: 3864573 (1975-07-01), Hoffman et al.
patent: 3868510 (1975-02-01), Murata et al.
patent: 4057725 (1977-04-01), Wagner
patent: 4170417 (1979-10-01), Tourres

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