Method and apparatus for measuring pipe coating thickness

Details Method and apparatus for measuring pipe coating thickness Method and apparatus for measuring pipe coating thickness

1979-09-12

1979-07-10

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33147J, 33147N, 33178E, G01B 508, G01B 510

Patent

active

041603290

ABSTRACT:
This invention relates to a method and apparatus for monitoring the amount of coating material that has been applied to a pipe. Opposed parallel sensing arms are positioned in contact with the coated pipe. One of the arms is movable relative to the other arm and in response to variations in the thickness of the coating. A direct mechanical linkage may be utilized to provide a readout of the variations in coating thickness or the movements of the arm may be used to vary the output of a potentiometer to provide an electrical readout. The potentiometer output may, in turn, be coupled with digital circuitry to provide a digital display. The circuitry may also include logic circuitry which will translate the variations in readings into positive or negative deviations from a desired predetermined coating thickness. The invention also contemplates coupling the output from the monitoring device with the controls for the coating plant so as to automatically compensate for excesses or deficiencies in the coating thickness.

REFERENCES:
patent: 601721 (1898-04-01), Vine
patent: 3846916 (1974-11-01), Moriya et al.
patent: 3851396 (1974-12-01), Klabunde
patent: 3902249 (1975-09-01), McClughan
patent: 3962792 (1976-06-01), Stepanek et al.
patent: 4005528 (1977-02-01), Albertazzi

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