Intelligent tire systems and methods

• US 8,077,025 B2
• Filed: 09/18/2007
• Issued: 12/13/2011
• Est. Priority Date: 09/18/2007
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Hammerschmidt, Dirk, Jongsma, Jakob
• Primary Examiner(s): Previl, Daniel
• Application Number:
  US11/856,748
• Publication Number:
  US 20090072958A1
• Time in Patent Office: 1,547 Days
• Field of Search: 340/447, 340/426.33, 340/442, 340/444, 340/440, 340448-449, 340/457.1, 340465-466, 340438-439
• US Class Current: 340/447
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0483 Wireless routers between wheel mounted transmitters and chassis mounted receivers

Abstract

The invention is related to intelligent tire systems and methods. In one embodiment, an intelligent tire system (ITS) comprises a first sensor device, a second sensor device, a central control unit, and a transceiver. The first sensor device is mounted in a tire of a vehicle and comprises a radio frequency (RF) transmitter. The second sensor device is mounted in the tire and comprises an RF transceiver, the second sensor device adapted to receive a transmitter transmission from the first sensor device comprising first sensor data. The central control unit is mounted in the vehicle. The transceiver is mounted in the vehicle and is adapted to receive a transceiver transmission from the second sensor device comprising first sensor data and second sensor data and to transmit the transceiver transmission to the central control unit.

Claims

1. An intelligent tire system (ITS) comprising:

a first sensor device mounted in a tire of a vehicle and comprising a radio frequency (RF) transmitter, the first sensor device configured to sense first sensor data;

a second sensor device mounted in the tire and comprising an RF transceiver communicatively coupled to the RF transmitter to receive a transmitter transmission from the first sensor device comprising the first sensor data, the second sensor device configured to sense second sensor data;

a central control unit mounted in the vehicle; and

a transceiver mounted in the vehicle and communicatively coupled to the RF transceiver to receive a transceiver transmission from the second sensor device comprising the first sensor data and the second sensor data and to transmit the transceiver transmission to the central control unit.

2. The ITS of claim 1, wherein the RF transmitter is configured to transmit transmissions in a first range, and wherein the RF transceiver is configured to transmit transmissions in a second range longer than the first range.

3. The ITS of claim 1, wherein the transceiver is mounted intermediate the tire and the central control unit.

4. The ITS of claim 1, wherein the transceiver is integrated with the central control unit.

5. The ITS of claim 1, wherein the transceiver is mounted proximate the tire.

6. The ITS of claim 1, wherein the first and second sensor devices are selected from the group consisting of a pressure sensor, an inertia sensor, an acceleration sensor, a stress sensor, a temperature sensor, and a magnetic sensor.

7. The ITS of claim 1, wherein the transceiver is configured to galvanically transmit the transceiver transmission to the central control unit.

8. The ITS of claim 1, further comprising a plurality of first sensor devices mounted in the tire of the vehicle, each first sensor device comprising an RF transmitter communicatively coupled to the RF transceiver to transmit first sensor data to the second sensor device.

9. The ITS of claim 1, wherein the transceiver is configured to radiate a signal toward the tire to determine a position of the second sensor devices on a rotational radius of the tire.

10. The ITS of claim 9, wherein the second sensor device is configured to determine a signal strength of the signal radiated by the transceiver and to send the transceiver transmission when the signal strength is high.

11. An intelligent tire system (ITS) comprising:

a first sensor to sense a first condition related to a tire and comprising a wireless transmitter;

a second sensor to sense a second condition related to the tire and comprising a wireless transceiver to receive data related to the first condition from the first sensor; and

a central control unit to receive data from the second sensor, the data related to the first condition and the second condition.

12. The ITS of claim 11, further comprising a transceiver, wherein the central control unit is communicatively coupled to the transceiver to receive data from the second sensor via the transceiver, the data related to the first condition and the second condition.

13. An intelligent tire system (ITS) comprising:

a sensor network comprising a plurality of sensors disposed in a tire;

a transceiver mounted external to the tire and wirelessly coupled to the wireless sensor network by at least one of the plurality of sensors; and

a controller coupled to the transceiver,

wherein at least one of the plurality of sensors comprises a transceiver to receive data from others of the plurality of sensors and to transmit the data to the transceiver.

14. The ITS of claim 13, wherein each of the plurality of sensors comprises a short-range transmitter.

15. The ITS of claim 13, wherein the controller is wirelessly coupled to the transceiver.

16. The ITS of claim 13, wherein the transceiver is integrated with the controller.

17. The ITS of claim 13, wherein the plurality of sensor devices are wirelessly coupled to form the sensor network.

18. An intelligent tire system (ITS) comprising:

a sensor network comprising a plurality of sensor devices disposed in a tire;

a lead embedded in the tire, wherein each of the plurality of sensor devices is capacitively coupled to the lead to form the sensor network;

a transceiver wirelessly coupled to the wireless sensor network by at least one of the plurality of sensor devices; and

a controller coupled to the transceiver.

19. The ITS of claim 18, wherein the lead comprises a steel belt of the tire.

20. A method of monitoring a condition related to a tire in a vehicle comprising the steps of:

sensing information about a first condition related to the tire by a first sensor in the tire;

sensing information about a second condition related to the tire by a second sensor in the tire;

transmitting the information about the first condition from the first sensor to the second sensor; and

transmitting the information about the first and second conditions from the second sensor to a controller in the vehicle, wherein a transmitting power of the second sensor is greater than a transmitting power of the first sensor.

21. The method of claim 20, wherein the step of transmitting the information about the first and second conditions from the second sensor to a controller in the vehicle further comprises transmitting the information via a transceiver intermediate the second sensor and the controller.

22. A method of monitoring a tire of a vehicle comprising the steps of:

sensing information about a plurality of conditions related to the tire by a plurality of sensors mounted in the tire;

collecting the information at one of the plurality of sensors;

transmitting the information from a short-range transmitter of the one of the plurality of sensors to a transceiver mounted proximate the tire; and

transmitting the information from a long-range transmitter of the transceiver to a central control unit in the vehicle.