Method for assessing a state of a document of value with regard to limpness using ultrasound, and means for carrying out the method
AssigneeGiesecke & Devrient GmbH
InventorsJan Domke, Klaus Thierauf, Stefan Kokrhoun, Franz Müller
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Abstract
In a method for assessing a condition of at least one value document with regard to limpness, there is determined from transmission values representing the ultrasound transmission at different places on the value document a condition value which depends on a variation of the transmission values and characterizes the condition of the value document with regard to limpness. A condition of the value document is determined for the condition value using a preset criterion.
Claims48
A method for assessing a condition of at least one value document with regard to limpness using an ultrasound device to obtain transmission values, comprising the steps of:
- determining from transmission values representing the ultrasound transmission at different places on the value document a condition value, the condition value depending on a local variation of the transmission values and characterizing the condition of the value document with regard to limpness, wherein the local variation of the transmission values is a change or fluctuation between the transmission values at different places and not an average of transmission values;
- and
- determining a condition of the value document from the condition value using a preset criterion.
An evaluation device for assessing a condition of at least one value document with regard to limpness, wherein the device is configured to:
- determine from transmission values representing the ultrasound transmission at different places on the value document a condition value, the condition value depending on a local variation of the transmission values and characterizing the condition of the value document with regard to limpness, wherein the local variation is a change or fluctuation between the transmission values at different places and not an average of transmission values;
- and
- determine a condition of the value document from the condition value using a preset criterion.
Dependencies are inferred from the claim text.