Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Franz Nömmer

Norbert Holl

August Häusler

Michael Fiedler

Franz Engelhardt

Robert Klus

Antonius Rossberger

A method for the calibration of a sensor system is provided, the method including use of two calibration media. A high-quality first calibration medium, having a standardized reference independent of the sensor system to be calibrated, is used for a first calibration step in which the sensor system is calibrated and adjusted. A second calibration step immediately follows using a second calibration medium, having a non-standardized reference and being a component of the sensor system, to generate and store measuring signals of the second calibration medium with at least one sensor of the sensor system. Upon subsequent calibrations of the sensor system the second calibration medium is used exclusively so as to generate measuring signals of the second calibration medium with the sensor. If the measuring signals generated in the subsequent calibrations deviate from the stored measuring signals of the second calibration step, an adjustment of the sensor is effected.

Method for calibrating a sensor system

Sensor components having sides facing the sheet material have one or a plurality of front elements which are detachable and replaceable with low effort. So in the case of wear of the sensor fronts, entire sensor components no longer have to be replaced but only individual front elements of the sensor component are replaced. The front elements do not contact the inner area of the housing and the sensitive measuring elements arranged therein. When the front elements are detached from the housing for maintenance, the measuring elements remain dustproof encapsulated in the housing of the sensor component. The front elements preferably have a comb structure which improves the transport of the bank notes at the transition between the sensor components.

Sensor and device for examining sheet material, and sensor maintenance method

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Dorfen, Germany

Franz Nömmer