US 12,322,237 B2
Method for classifying a banknote, classification device, method for producing a classifier and use for the classification of a banknote
Wolfgang Rauscher, Parkstetten (DE)
Assigned to GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
Appl. No. 17/925,276
Filed by GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
PCT Filed May 10, 2021, PCT No. PCT/EP2021/025176
§ 371(c)(1), (2) Date Nov. 14, 2022,
PCT Pub. No. WO2021/228433, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 102020002902.7 (DE), filed on May 14, 2020.
Prior Publication US 2023/0162553 A1, May 25, 2023
Int. Cl. G07D 7/1205 (2016.01); B42D 25/29 (2014.01)
CPC G07D 7/1205 (2017.05) [B42D 25/29 (2014.10)] 12 Claims
OG exemplary drawing
 
1. A method for classifying a banknote having at least one luminescent feature, in which the following steps are carried out:
a) exciting the luminescent feature;
b) recording intensity values of the excited luminescent feature at a first time, at a second time that is different from the first time, and at least one further time between the first and second time;
c) determining a decay time of the luminescent feature by approximate integration over the recorded intensity values between the first time and the second time;
d) comparing the determined decay time with a reference decay time of the luminescent feature; and
e) classifying the banknote based on the comparison.