Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1987-08-14
1988-12-13
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 61P, G01R 2726
Patent
active
047913533
ABSTRACT:
A combination caliper/moisture sensor in the form of a scanner in the cross-direction of sheet material being manufactured by a papermaking machine includes a pair of capacitive plates on opposite sides of the moving sheet material and in substantial contact with it which are utilized for measuring capacitance between the juxtaposed plates which are spaced in accordance with the caliper of the paper. Then a magnetic circuit which provides a flux path through the paper is utilized for measuring caliper which is the independent variable of the capacitance equation which, when solved, yields the dielectric constant. Since there is a known relationship between percent moisture and the dielectric constant, the percent moisture of the sheet material can be determined.
REFERENCES:
patent: 3258686 (1966-06-01), Selgin
patent: 3523243 (1970-08-01), Wagner
patent: 4675595 (1987-06-01), Hane
Eisenzopf Reinhard J.
Impact Systems Inc.
Miele Anthony L.
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