| 摘要 |
<p>The invention relates to a method for the neutralisation of a portable unit (B), called the identifier, on the loss thereof within an interior region (3), called the usable space of a vehicle (1), provided with a hands-free access device, comprising at least one external transmitting antenna (9), transmitting identification signals for identifiers (B) outside the vehicle (1), said external antenna having a cover (Z9), formed by an exterior region extending to the exterior of the vehicle (1) and an interior region (Zc) extending into the interior of the vehicle into the usable space (3) thereof. According to the invention, the neutralisation method comprises installing facing each exterior antenna (9), a specific interior transmitting antenna (11) called the counter antenna the cover (Z11) of which covers at least the interior region (Zc) of the cover (Z9) of said exterior antenna and to control simultaneously to retransmission of each identification signal S1 by said exterior antenna, retransmission by the counter antenna (11 ) of a parasite signal S2 designed to jam said identification signal.</p> |
