Method of Transmitting an Electromagnetic Identification Request Signal to an Electronic Housing Mounted on a Wheel of a Vehicle

• US 20080231436A1
• Filed: 06/30/2006
• Published: 09/25/2008
• Est. Priority Date: 08/04/2005
• Status: Active Grant

• Current Assignee: Continental Automotive France (Continental AG)
• Original Assignee: Continental Automotive France (Continental AG)
• Inventors: Costes, Olivier
• Granted Patent: US 7,893,820 B2
• Time in Patent Office: Days
• US Class Current: 340/441
• CPC Class Codes: B60C 23/0416 allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right

Abstract

The invention relates to a method of transmitting an electromagnetic identification request signal, generated by means of an antenna (11-14) connected to a central unit (15) mounted on a vehicle (1), to an electronic housing (6-9) mounted on a wheel (2-5) of said vehicle. This transmission method consists in successively transmitting, after starting of the vehicle (1), a plurality of identical identification request signals (S1 . . . , Si, Si+1, . . . ), and is characterized in that, after each transmission at an instant Ti of a signal Si, the speed of travel V of the vehicle (1) is measured, the time Tr of a complete rotation of the wheel (2-5) is calculated for said speed V, and the following signal Si+1 is triggered at an instant Ti+1 such that: Ti+1=Ti+nTr+Tθ with n integer ≧1 and 0<Tθ<Tr.

Claims

1. A method of transmitting an electromagnetic identification request signal, generated by means of an antenna (11-14) connected to a central unit (15) mounted on a vehicle (1), to an electronic housing (6-9) mounted on a wheel (2-5) of said vehicle, this transmission method consisting in successively transmitting, after starting of the vehicle (1), a plurality of identical identification request signals (S1 . . . , Si, Si+1, . . . ), and said transmission method being characterized in that it consists, after each transmission at an instant Ti of a signal Si:

in measuring the speed of travel V of the vehicle (1) and in calculating the time Tr of a complete rotation of the wheel (2-5) for said speed V,

and in triggering the following signal Si+1 at an instant Ti+1 such that Ti+1=Ti+nTr+Tθ

with n integer ≧

1 and 0<

Tθ

<

Tr.

2. The transmission method as claimed in claim 1, characterized in that, with a view to determining each time interval (Ti+1−

Ti) separating two successive signal triggerings, a variable value Tθ

is used, dependent on the measured speed of travel V of the vehicle (1), and such that Tθ

=k Tr with 0<

k<

1.

3. The transmission method as claimed in claim 2, characterized in that a value θ

is used such that;

Tθ

=k Tr with 0<

k<

0.05.