Method for measuring the thickness and temperature of a moving metal sheet by means of eddy currents
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United States of America Patent
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-
Jul 12, 1988
Grant Date -
N/A
app pub date -
Nov 5, 1986
filing date -
Nov 6, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A non-contacting, eddy current, measuring method for determining the thickness and temperature of a moving metal sheet as in a metal rolling operation. Two separate magnetic fields are generated by applying two voltages of differing frequencies to a primary winding on one side of the sheet to induce two voltages in an opposed secondary winding on the other side of the sheet. The generated voltages are used to determine the calibration constants required to calculate the thickness and temperature of the moving sheet.
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