US 9,310,231 B2 · Checking unit and method for calibrating a checking unit

Abstract

The invention relates to a checking unit for checking a material web and to a calibrating method for the checking unit. The checking unit is equipped with drive means for transporting the calibration medium past the checking unit in order to detect a multiplicity of measurement values of the calibration medium. The drive means are arranged in the housing of the checking unit in order for the drive means to be protected from moisture or contaminants from the environment. To obtain a transporting of the calibration medium past the checking unit in spite of the arrangement of the drive means in the housing, drive means are employed that are configured for a contactless interaction with the calibration medium and can transport the calibration medium past the checking unit contactlessly. For this purpose there is preferably used a magnetic interaction between the drive means and the calibration medium.

Claims20

Dependent claims

A checking unit for checking a material web transportable past the checking unit along a transport direction, the checking unit comprising:

measurement elements configured for detecting measurement values of the material web transportable past the checking unit and for detecting measurement values of a calibration medium transportable past the checking unit along the transport direction;
an operating mode in which the checking unit can be calibrated with the aid of the calibration medium which is transportable past the checking unit along the transport direction for calibration;
one or more drive means configured for transporting the calibration medium past the checking unit through a contactless interaction;
a housing having arranged therein both the drive means for transporting the calibration medium past and the measurement elements for detecting the measurement values of the calibration medium.

1 more element

A method for calibrating a checking unit wherein the checking unit is configured for checking a material web transportable past the checking unit along a transport direction and has a housing having arranged therein both drive means for transporting a calibration medium past and measurement elements for detecting measurement values of the material web and measurement values of the calibration medium, wherein the method comprises the steps of:

arranging a calibration medium on a side of the checking unit intended for sensing measurement values such that the calibration medium reaches the capture region of the drive means;
transporting the calibration medium past the checking unit along the transport direction with the aid of the drive means, with the calibration medium being transported past the checking unit through a contactless interaction with the drive means of the checking unit;
detecting a multiplicity of measurement values at different positions within a measurement portion of the calibration medium with the aid of the measurement elements of the checking unit while the calibration medium is being transported past the checking unit;
calibrating the checking unit with the aid of the detected measurement values of the calibration medium.

1 more element

Dependencies are inferred from the claim text.

Checking unit and method for calibrating a checking unit

Life of this patent

Checking unit and method for calibrating a checking unit

Life of this patent

Abstract

Claims20