Method and device for identifying an electronic code

G - Physics – 06 – K

Patent

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G06K 7/08 (2006.01)

Patent

CA 2723122

The present publication discloses a method and device for reading an electronic code. According to the method, an alternating electrical signal is brought to the code (11) being measured, with the aid of electrodes (4, 5), and the current or voltage travelling through the electrodes (4, 5) is measured. According to the invention, the real (8) and the imaginary (9) components of the current or correspondingly the voltage are defined, and the electrodes (4, 5) being on an essentially lossless surface, an angle correction is made to the real (8) and imaginary (9) components of the current or the voltage, in such a way that substantial changes in the current take place only in the imaginary component (9) of the current or voltage.

La présente invention porte sur un procédé et un dispositif pour lire un code électronique. Selon le procédé, un signal électrique alternatif est amené jusqu'au code (11) mesuré, à l'aide d'électrodes (4, 5), et le courant ou la tension entre les électrodes (4, 5) est mesuré. Selon l'invention, les composantes réelle (8) et imaginaire (9) du courant, ou de façon correspondante, de la tension, sont définies, et les électrodes (4, 5) étant sur une surface sensiblement sans perte, une correction angulaire est apportée aux composantes réelle (8) et imaginaire (9) du courant ou de la tension, de telle manière que des variations importantes du courant apparaissent seulement dans la composante imaginaire (9) du courant ou de la tension.

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