Process for the emission of a request toward a badge

• US 20030146822A1
• Filed: 12/27/2002
• Published: 08/07/2003
• Est. Priority Date: 12/27/2001
• Status: Abandoned Application

• Current Assignee: Continental Automotive GmbH (Continental AG)
• Original Assignee: Continental Automotive GmbH (Continental AG)
• Inventors: Brillon, Alain
• Application Number:
  US10/329,711
• Publication Number:
  US 20030146822A1
• Time in Patent Office: Days
• US Class Current: 340/10.3
• CPC Class Codes: B60R 25/04 operating on the propulsion system, e.g. engine or drive motor
• CPC Class Codes: B60R 25/2072 with means for preventing jamming or interference of a remote switch control signal
• CPC Class Codes: B60R 25/245 where the antenna reception area plays a role
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10079 the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 2209/61 Signal comprising different frequencies, e.g. frequency hopping
• CPC Class Codes: G07C 2209/63 Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

In this process for emission of a request toward a badge of a remote control system, the request is transmitted by a signal of a predetermined frequency, with the help of antennas adapted to emit within the interior of the passenger compartment of a vehicle. The amplitude of the signal transmitting a single and same request varies in the course of the transmission of this same request between two end values (A1, A2), and in that the amplitude corresponding to the lower end value (A2) is sufficient that the portion of the request emitted with this minimum amplitude (A2) be perceived only within the predetermined zone.

Claims

1. Process for emission of a request toward a badge of a remote control system in which the request is transmitted by a signal of a predetermined frequency, with the help of antennas adapted to emit within a predefined zone, such as for example a passenger compartment of a vehicle,

characterized in that the amplitude of the signal transmitting a single and same request varies in the course of the transmission of this same request between two end values (A1, A2), and in that the amplitude corresponding to the lower end value (A2) is sufficient that the portion of the request emitted with this minimum amplitude (A2) be perceived only in the predetermined zone.

2. Process for emission according to claim 1, characterized in that the variation of amplitude of the signal is progressive.

3. Process for emission according to one of claims 1 or 2, characterized in that at least half of the request is transmitted with a maximum amplitude (A1).

4. Process for emission according to one of claims 1 to 3, characterized in that the amplitude of the signal is greater at the beginning of the request than at the end of the request.

5. Process for emission according to claim 4, characterized in that the amplitude of the signal is measured at the beginning of the request and in that the measured amplitude (Am) is compared to the theoretical emission amplitude so as to adjust precisely the amplitude of the signal at the end of the request.

6. Process for emission according to one of claims 1 to 5, characterized in that the maximum amplitude (A1) of emission is comprised between 115% and 150% of the minimum amplitude (A2) of emission.