System and method for tire pressure monitoring providing automatic tire location recognition

• US 20030164758A1
• Filed: 08/12/2002
• Published: 09/04/2003
• Est. Priority Date: 03/01/2002
• Status: Active Grant

• Current Assignee: Sensata Technologies Incorporated (Sensata Technologies Holding Plc)
• Original Assignee: Lear Corporation
• Inventors: Nantz, John S., King, Ronald O., Tang, Qingfeng, Conner, Bruce, Walker, Keith
• Granted Patent: US 6,788,193 B2
• Time in Patent Office: Days
• US Class Current: 340/442
• CPC Class Codes: B60C 23/0416 allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
• CPC Class Codes: H01Q 1/2241 used in or for vehicle tyres
• CPC Class Codes: H01Q 1/3233 particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
• CPC Class Codes: H01Q 1/325 characterised by the location of the antenna on the vehicle
• CPC Class Codes: H01Q 1/3291 mounted in or on other locations inside the vehicle or vehicle body
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/30 with feed to end of elongated active element, e.g. unipole H01Q9/44 takes precedence
• CPC Class Codes: H03B 5/326 the resonator being an acoustic wave device, e.g. SAW or BAW device
• CPC Class Codes: H03C 1/46 Modulators with mechanically-driven or acoustically-driven parts

Abstract

In a system for remote monitoring of tire pressure in a vehicle having front tires including a right tire and a left tire, and rear tires including a right tire and a left tire, a system and method are provided for automatically identifying tire location. A transmitters mounted in each tire transmits tire information signals conveying tire pressure data and associated tire rotation direction data. A vehicle mounted receiver has a location a first distance from the front tires and a second distance from the rear tires, the first distance being different from the second. A vehicle mounted controller in communication with the receiver determines whether pressure data is associated with a front tire or a rear tire based on the strength of the tire information signal, and whether pressure data is associated with a right tire or a left tire based on the associated rotation direction data.

Claims

1. In a system for remote monitoring of tire pressure in a vehicle having front tires comprising a right tire and a left tire, and rear tires comprising a right tire and a left tire, a system for automatically identifying tire location comprising:

a plurality of transmitters, each transmitter for mounting in one of the tires, each transmitter for transmitting tire information signals conveying tire pressure data and tire rotation direction data associated therewith;

a receiver for receiving the tire information signals transmitted by the transmitters, the receiver for mounting on the vehicle at a location having a first distance from the front tires and a second distance from the rear tires, the first distance different from the second distance; and

a controller for mounting on the vehicle and to be provided in communication with the receiver, the controller for determining whether pressure data conveyed by a tire information signal is associated with a front tire or a rear tire based on a strength of the signal, and for determining whether pressure data conveyed by a tire information signal is associated with a right tire or a left tire based on the associated rotation direction data.

2. The system of claim 1 further comprising:

a plurality of pressure sensors for sensing tire pressure, each pressure sensor for mounting in one of the tires and to be provided in communication with a transmitter; and

a plurality of rotation sensors for sensing tire rotation direction, each rotation sensor for mounting in one of the tires and to be provided in communication with a transmitter.

3. The system of claim 2 wherein a transmitter, a pressure sensor, and a rotation sensor together comprise a tire monitor, the tire monitor for mounting in one of the tires.

4. The system of claim 1 wherein the first distance is greater than the second distance.

5. The system of claim 1 wherein the first distance is less than the second distance.

6. The system of claim 1 wherein a single tire information signal conveys both the pressure data and the associated rotation direction data.

7. The system of claim 1 wherein the receiver and controller together comprise a control unit for mounting on the vehicle.

8. The system of claim 1 wherein each transmitter has an identification associated therewith, and each transmitter is also for transmitting the associated identification for receipt by the receiver and for use by the controller in determining a tire location.

9. The system of claim 8 wherein the transmitted identification is also for use by the controller to determine whether tire pressure data conveyed by a tire information signal is associated with the vehicle.

10. The system of claim 1 further comprising a display for mounting in the vehicle, the display for use by the controller to covey tire pressure and location information to a user.

11. In a system for remote monitoring of tire pressure in a vehicle having front tires comprising a right tire and a left tire, and rear tires comprising a right tire and a left tire, a method for automatically identifying tire location comprising:

transmitting from each tire pressure data and rotation direction data associated therewith;

receiving at a selected location on the vehicle the pressure data and rotation direction data;

determining whether pressure data is associated with a front tire or a rear tire based on a strength of a signal conveying the pressure data; and

determining whether pressure data is associated with a right tire or a left tire based on the associated rotation direction data.

12. The method of claim 11 further comprising:

detecting a pressure in each tire; and

detecting a rotation direction in each tire.

13. The method of claim 12 wherein a plurality of tire monitors are provided, each tire monitor for mounting in one of the tires and comprising a pressure sensor for detecting pressure, a rotation sensor for detecting rotation direction, and a transmitter in communication with the pressure sensor and the rotation sensor for transmitting pressure data and rotation direction data.

14. The method of claim 11 wherein a receiver is provided receiving pressure data and rotation direction, the receiver for mounting on the vehicle at a location having a first distance from the front tires and a second distance from the rear tires, the first distance different from the second distance.

15. The method of claim 14 wherein the first distance is greater than the second distance.

16. The method of claim 14 wherein the first distance is less than the second distance.

17. The method of claim 11 wherein pressure data and associated rotation direction data are conveyed by a single signal.

18. The method of claim 14 wherein a controller is provided for determining whether pressure data is associated with a front tire or a rear tire based on a strength of a signal conveying the pressure data and whether pressure data is associated with a right tire or a left tire based on the associated rotation direction data, the controller for mounting on the vehicle and to be provided in communication with the receiver.

19. The method of claim 13 wherein each transmitter has an identification associated therewith, and each transmitter is also for transmitting the associated identification for use in determining a tire location.

20. The method of claim 19 wherein the transmitted identification is also for use to determine whether tire pressure data is associated with the vehicle.