Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects
Patent
1975-06-30
1977-07-26
Dixon, Harold A.
Radiant energy
Invisible radiant energy responsive electric signalling
With means to inspect passive solid objects
250360, G01N 2300
Patent
active
040385507
ABSTRACT:
The method of automatically measuring tube wall thickness includes axially introducing an radio-active radiation source into the tube to be measured and directing its radiation at about 45 degrees toward the tube wall. Other steps include distributing a plurality of scintillation counters uniformly around the tube, and measuring the transmitted radiation by said counters. The measurement values compensated for a specific wall thickness being amplified proportionally to the radiation intensity and are each adapted to be fed in a predetermined measuring time through a measuring capacitor, the charge values of the capacitors being indicated in succession and fed to a statistical measurement value detecting arrangement. Included is the preliminary step of automatically calibrating the measuring arrangement by axially introducing said radiation source into a corresponding tube with standard dimension, and measuring the radiation therethrough; and apparatus therefore.
REFERENCES:
patent: 2583132 (1952-01-01), Altar et al.
patent: 2702864 (1955-02-01), McKee
patent: 2965758 (1960-12-01), Malick
patent: 3178576 (1965-04-01), Arvanetakis
patent: 3835324 (1974-09-01), Weigle
Ivens Gunter
Schulz Gunter
Wassen Johann
Dixon Harold A.
Mannesmannrohren-Werke AG
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