Tire sensor localization utilizing speed corrected frequency

• US 20050229693A1
• Filed: 06/15/2005
• Published: 10/20/2005
• Est. Priority Date: 07/03/2002
• Status: Active Grant

• Current Assignee: Continental Automotive Systems, Inc. (Continental AG)
• Original Assignee: Siemens VDO Automotive Corporation (Siemens AG)
• Inventors: Desai, Tejas B.
• Granted Patent: US 7,111,508 B2
• Time in Patent Office: Days
• US Class Current: 73/146
• CPC Class Codes: B60C 23/0416 allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol

Abstract

A method of localizing the location of a received signal from a tire pressure sensor includes sending an AM identification signal. The AM signal is adjusted for speed such that the frequency of the signal equals a constant multiplied by the speed of the vehicle. Each of the tire locations on a vehicle have an expected sequence of black-out points in the signal received by a receiver at any point on the vehicle. That is, given a particular vehicle design, the AM signal described above would be received at a receiver with an expected sequence of received peaks and black-out points. Since the frequency of the signal is adjusted for speed, the received signal will accurately allow the location of black-out points to be utilized to identify the tire location for a particular signal.

Claims

1-8. -8. (canceled)

9. A tire pressure monitoring system comprising:

a plurality of tire pressure sensor/transmitters;

a receiver and control for receiving signals transmitted by each of said tire pressure sensor/transmitters;

said tire pressure sensor/transmitters including the ability to send an identification signal; and

a control associated with said sensor/transmitters monitoring vehicle speed, and a frequency of transmission of said identification signal being adjusted to be dependent upon said monitored vehicle speed.