# US 7,607,528 B2 · Method and device for checking banknotes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,528 B2 - Document ID: US7607528B2 - Status: Granted - Kind: B2 - Application number: 10/539,796 - Filed: 2003-12-16 - Published: 2006-07-13 - Granted: 2009-10-27 - Earliest claimed: 2002-12-18 - Assignees: Giesecke & Devrient GmbH - Inventors: Hendrik Derks; Matthias Hecht; Norbert Holl; Nikolai Lipkowitsch; Dieter Stein; Holger Trumpfheller; Bernd Wunderer - Web page: https://patentgrep.com/patent/US7607528B2 ## CPC - G07D 7/185: Detecting holes or pores - G07D 7/08: Acoustic waves - G07D 7/12: Visible light, infrared or ultraviolet radiation - G07D 7/183: Detecting folds or doubles - G07D 7/187: Detecting defacement or contamination, e.g. dirt - G07D: HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING ## Abstract A method and an apparatus for checking bank notes, in which data from at least two different measurings of the bank notes to be checked are evaluated. Bank notes are checked, whereby data from at least two different measurings of bank notes to be checked are evaluated, a first property of the bank note to be checked being derived from the data of at least one first measuring, at least one second property of the bank note to be checked being derived from the data of at least one second measuring. A correlation between the first and the second property for the same places on the bank note to be checked is determined, and the first property is derived once again. For the places of the bank note to be checked, for which a correlation between first and at least second property has been determined, an altered derivation of the first property from the data of the at least first measuring is performed. ## Claims ### Claim 1 Method for checking bank notes, in which data from at least two different sensor measurings of the bank notes to be checked are evaluated, comprising the steps: deriving a first property of the bank note to be checked from data obtained from at least one first measuring using at least a first sensor, deriving at least one second property of the bank note to be checked from data obtained from at least one second measuring using at least a second sensor, then deriving a correlation between said first property and said at least one second property for the same places on the bank note to be checked to provide combined data related to the first and at least one second properties of the bank note to be checked, and then deriving the first property once again, so that at places on the bank note to be checked, for which said correlation between the first property and the at least one second property was determined, an altered derivation of the first property is effected from the data of the at least first measuring by comparing data obtained from the correlation between the first and at least one second property with the data obtained from the first measuring, and using the result of the comparison to obtain an improved indication of said first property. ### Claim 2 (depends on 1) Method according to claim 1, wherein, when the altered derivation of the first property is effected, data of places used to derive said correlation between the first and at least one second property are not taken into account. ### Claim 3 (depends on 1) Method according to claim 1, wherein, with the measurings, data for at least one side of the bank note to be checked are generated. ### Claim 4 (depends on 3) Method according to claim 3, wherein said data are generated for the complete side of the bank note to be checked. ### Claim 5 (depends on 1) Method according to claim 1, wherein the first property is a soiling condition of the bank notes to be checked. ### Claim 6 (depends on 1) Method according to claim 1, wherein the first measuring is an optical measuring. ### Claim 7 (depends on 1) Method according to claim 1, wherein the at least one second property is a damage condition of the bank notes. ### Claim 8 (depends on 1) Method according to claim 1, wherein the second measuring is an optical and/or acoustic measuring. ### Claim 9 Apparatus for checking bank notes having at least two sensors, the data of which are evaluated for the checking of bank notes by a control device, comprising; the control device is arranged to derive a first property of the bank note to be checked from the data obtained from at least one first sensor, the control device is arranged to derive at least one second property of the bank note to be checked from the data obtained from at least one second sensor, the control device is arranged to derive a correlation between the first property and the at least one second property for the same places on the bank note to be checked to provide combined data related to the first and at least one second properties of the bank note to be checked, and the control device is arranged to once again derive the first property, so that at places of the bank note to be checked, for which said correlation between the first and the at least one second property was determined, an altered derivation of the first property is effected from the data of the at least first sensor by comparing data obtained from the correlation between the first and at least one second property with the data obtained from the at least first sensor, and using the result of the comparison to obtain an improved indication of said first property. ### Claim 10 (depends on 9) Apparatus according to claim 9, wherein when the altered derivation is effected, the control device does not take into account data of the at least one first sensor relating to places used to derive said correlation. ### Claim 11 (depends on 9) Apparatus according to claim 9 wherein the sensors are arranged to generate data for at least one side of the bank note to be checked. ### Claim 12 (depends on 11) Apparatus according to claim 11, wherein the sensors are arranged to generate data for the complete at least one side of the bank note to be checked. ### Claim 13 (depends on 9) Apparatus according to claim 9, wherein the first property is a soiling condition of the bank notes to be checked. ### Claim 14 (depends on 9) Apparatus according to claim 9, wherein the at least first sensor is an optical sensor. ### Claim 15 (depends on 9) Apparatus according to claim 9, wherein the at least one second property is a damage condition of the bank notes to be checked. ### Claim 16 (depends on 9) Apparatus according to claim 9, wherein the at least one second sensor is an optical and acoustic sensor, or either an optical or acoustic sensor.