Title:
SYSTEM FOR MONITORING TYRES OF A VEHICLE COMPRISING A DEVICE AUTOMATICALLY LOCATING WHEEL TRANSMITTERS
Document Type and Number:
WIPO Patent Application WO2002039137
Kind Code:
A3
Abstract:
The invention concerns a system for monitoring tyres of a vehicle comprising a device for locating the position of a radio transmitter comprising: a first radio reception chain with a first antenna; a second radio reception chain with a second antenna, said first and second antennae defining an axis D1; first means for comparing the phases of a radio signal received by the first and second antennae to determine whether the signal received by the first antenna is in phase lead, in phase lag or at an identical phase relative to the radio signal received by the second antenna; and means for processing the results derived from the comparing means designed to give the position of said radio transmitter relative to said antennae.
Inventors:
BOULOT JEAN-FRANCIS (FR)
Application Number:
PCT/EP2001/012693
Publication Date:
July 18, 2002
Filing Date:
November 02, 2001
Export Citation:
Assignee:
MICHELIN SOC TECH (FR)
MICHELIN RECH TECH (CH)
BOULOT JEAN-FRANCIS (FR)
MICHELIN RECH TECH (CH)
BOULOT JEAN-FRANCIS (FR)
International Classes:
B60C23/04; B60C23/20; G01S3/04; G01S3/48; G01S5/12; (IPC1-7): G01S3/48; G01S3/48; B60C23/04
Domestic Patent References:
| WO1997006968A1 | 1997-02-27 | |||
| WO1994020317A1 | 1994-09-15 |
Foreign References:
| US5774047A | 1998-06-30 | |||
| EP1059177A1 | 2000-12-13 | |||
| GB2168812A | 1986-06-25 | |||
| US4305074A | 1981-12-08 | |||
| US5075694A | 1991-12-24 | |||
| EP1004461A2 | 2000-05-31 |
Other References:
ALLAN R: "WIRELESS TRANCEIVER WITH MICROMACHINED SENSOR DETECTS BOTH TIRE PRESSURE AND TEMPERATURE", ELECTRONIC DESIGN,US,PENTON PUBLISHING, CLEVELAND, OH, vol. 44, no. 26, 16 December 1996 (1996-12-16), pages 40, XP000682028, ISSN: 0013-4872
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