Contactless reading system for chip cards placed on objects

Details Contactless reading system for chip cards placed on objects Contactless reading system for chip cards placed on objects

G - Physics

06

K

G06K 7/08 (2006.01)

Patent

CA 2520082

A contactless reading system, wherein a chip card is fixed on a planar support of an object such as a book (11) for identification by means of the data contained in the chip card, and a mobile reader (16) provided with an antenna in order to read the data of the card. The antenna of the reader (16) consists of a small-sized convolution disposed in a series with a large-sized convolution, which are concentric and which have the same winding direction. A maximum value is obtained for the component (H) of the electromagnetic field produced by the antenna parallel to the antenna at a given distance from the antenna. Maximum reception by the chip card of electromagnetic signals emitted by the antenna is obtained when the antenna is disposed in a perpendicular position in relation to the support of the card and at the given distance from the card.

Système de lecture sans contact dans lequel une carte à puce est fixée sur un support plan d'un objet tel qu'un livre (11) dans le but de l'identifier grace à des données contenues dans la puce de la carte, et un lecteur mobile (16) disposant d'une antenne pour lire les données de la carte. L'antenne du lecteur (16) est composée d'une spire de petite dimension en série avec une spire de grande dimension, concentriques et de même sens d'enroulement. On obtient une valeur maximale de la composante (H) du champ électromagnétique produit par l'antenne parallèle à l~antenne à une distance prédéterminée de l'antenne. La réception par la carte à puce des signaux électromagnétiques émis par l~antenne est maximale lorsque l'antenne est disposée perpendiculairement au support de la carte et à la distance prédéfinie de cette dernière.

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