Voith Patent Gmbh

J. M. Voith Gmbh

Peter Biener

Theodor Bahr

Oliver Kaufmann

Rainer Wenzl

Gerd Krattenmacher

In a method for determining the moisture of a running material web, in particular a paper web or paperboard web, the material web is scanned by way of a sensor including a microwave resonator, the resonance response of the microwave resonator is investigated, and the moisture in the material web is established in the light of this resonance response while taking account of the distance between the microwave resonator and the material web. Also disclosed is a corresponding apparatus for determining the moisture.

Method and apparatus for determining the moisture of a running material web

A device for the measurement of the diameter of a body such as a cylinder, more particularly in the form of a workpiece on a roll grinding machine, having a contact wheel adapted to run on the surface of the body and a first rotational pickup (angle encoder) centrally coupled with or provided with a the contact wheel, and a second rotational pickup, which is adapted to indicate at least full revolutions of the body. The cylinder is coupled with the second rotational pickup (angle encoder), which like the first rotational pickup has high pulse rate for each measurement operation one respective start pulse and end pulse of one of these two pickups is utilized in order, with corresponding pulses of the other of the pickup, to calculate the diameter of the roll. A computer is provided which, by interpolation in each measurement operation of the registered pulses of at least one of the pickups, produces at least one intermediate pulse series with increments, which are respectively smaller than the fixed increments of the one pickup, of which one corresponds with such accuracy to the one end measurement pulse received approximately simultaneously of the one or normal pulse series of the other rotational pickup.

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Herbrechtingen, Germany

Peter Biener