Assistance for positioning a transponder

摘要

A method for assisting with positioning of an electromagnetic transponder by a user with respect to a terminal, wherein: a first value of the current in an oscillating circuit of the terminal is periodically measured; a second value of a ratio between a no-load value of this current, stored when no transponder is in the field of the terminal, and the first value, is calculated; and pieces of information intended for the user are controlled according to said second value.

主权项

1. A method to assist a user to position an electromagnetic transponder with respect to a terminal, comprising:
storing a no-load value representing a current in an oscillating circuit of the terminal when no transponder is in a field of the terminal; periodically determining an immediate load value representing an immediate current in the oscillating circuit of the terminal; repeatedly calculating a ratio between the no-load value and the immediate load value; determining whether the distance between a transponder and the terminal is too far, too close, or sufficient; communicating information to the user based on the act of determining whether the distance between the transponder and the terminal is too far, too close, or sufficient.