US 12,450,967 B2
Sensor for verifying value documents
Julia Danhof, Egling a.d. Paar (DE); Henning Geiseler, Munich (DE); and Wolfgang Deckenbach, Schechen (DE)
Assigned to GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
Appl. No. 18/546,463
Filed by GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
PCT Filed Feb. 15, 2022, PCT No. PCT/EP2022/025049
§ 371(c)(1), (2) Date Aug. 15, 2023,
PCT Pub. No. WO2022/174978, PCT Pub. Date Aug. 25, 2022.
Claims priority of application No. 10 2021 000 807.3 (DE), filed on Feb. 16, 2021.
Prior Publication US 2024/0127657 A1, Apr. 18, 2024
Int. Cl. G07D 7/1205 (2016.01); G07D 7/121 (2016.01); G07D 7/20 (2016.01)
CPC G07D 7/1205 (2017.05) [G07D 7/121 (2013.01); G07D 7/2075 (2013.01)] 21 Claims
OG exemplary drawing
 
13. A sensor for verifying a value document which, for verification, is transported past the sensor along a transport direction at a verification transport velocity, wherein the sensor comprises at least one excitation light source for exciting a luminescence of the value document, and comprises at least one photodetector for detecting the luminescence of the value document excited by the excitation light source, is configured for measuring the change over time in the luminescence of the value document while the value document is transported past the sensor, by means of the at least one photodetector, and comprises an evaluation device configured to determine a luminescence time constant of the value document at the verification transport velocity on the basis of the measured change over time in the luminescence of the value document, and comprises a correction device, in which is provided a velocity correction for correcting the luminescence time constant determined for the value document, and wherein at least one sensor-specific parameter is stored in the sensor, and wherein the correction device, for correcting the luminescence time constant of the value document transported past the sensor at the verification transport velocity, is configured, on the basis of the at least one sensor-specific parameter stored in the sensor and by means of information made available to the sensor regarding the verification transport velocity, to determine a sensor-specific correction factor which is applicable to the verification transport velocity of the value document, and wherein the sensor, in particular the correction device or the evaluation device of the sensor, is configured to correct the luminescence time constant determined for the value document with the aid of the at least one sensor-specific correction factor applicable to the verification transport velocity of the value document, in order to determine a corrected luminescence time constant for the value document, and wherein the sensor, in particular the evaluation device of the sensor, is configured to verify the luminescence of the value document on the basis of the corrected luminescence time constant.