US 12,320,876 B2
Sensor element and device for authenticating a data carrier having a spin resonance feature
Stephan Huber, Munich (DE); and Christian Schuller, Erharting (DE)
Assigned to GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
Appl. No. 18/267,007
Filed by GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
PCT Filed Dec. 13, 2021, PCT No. PCT/EP2021/025494
§ 371(c)(1), (2) Date Jun. 13, 2023,
PCT Pub. No. WO2022/128153, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 10 2020 007 707.2 (DE), filed on Dec. 16, 2020.
Prior Publication US 2024/0045010 A1, Feb. 8, 2024
Int. Cl. G01R 33/38 (2006.01); G01N 24/10 (2006.01); G01R 33/383 (2006.01); G07D 7/04 (2016.01)
CPC G01R 33/383 (2013.01) [G01N 24/10 (2013.01); G07D 7/04 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A sensor element for checking a flat data carrier, with a spin resonance feature, with
a magnetic core with an air gap into which the flat data carrier is insertable for authenticity checking,
an element for generating a static magnetic flux in the air gap,
a modulation coil for generating a time-varying magnetic field in the air gap, and
a resonator for exciting the spin resonance feature of the data carrier to be checked and for capturing the signal response of the spin resonance feature,
an evaluation unit which is adapted to generate a check result on the basis of the captured signal response of the spin resonance feature,
wherein the magnetic core is formed at least in part of an eddy current damping magnetic material, and
wherein the element for generating a static magnetic flux comprises at least one permanent magnet.