Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1981-10-26
1985-07-09
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324226, 324206, 73 377, G01B 710, G01R 3312, G01N 2772
Patent
active
045285071
ABSTRACT:
For measuring a property such as caliper of a traveling sheet, a sensor body and a target body are located on opposite sides of the sheet and constrained (e.g., by gas bearings) along a sensor path intersecting the path of the sheet. Gas bearings maintain these bodies at, substantially constant distances from the opposite surfaces of the sheet while permitting them to move in response to the position and thickness of the sheet. An active sensor element aboard the sensor body and a passive sensor element aboard the target body interact through the sheet to produce aboard the sensor body a response dependent on the sheet property. Manifestations of this response, such as light beam modulations, are produced, without solid bodily connections, at a location spaced from the sensor body where the manifestations are detected to produce a sheet property-indicative signal.
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Van Munn, P. H., "On Line Caliper Measurement and Control", in Tappi, vol. 53, No. 5, May 1970, pp. 825-829.
Domin Thomas M.
Landis Dan R.
Williams Paul
AccuRay Corporation
Edmonds Warren S.
Peterson C. Henry
Strecker Gerard R.
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