Tire pressure detecting device and tire monitor system

• US 20070180901A1
• Filed: 07/14/2006
• Published: 08/09/2007
• Est. Priority Date: 02/06/2006
• Status: Active Grant

• Current Assignee: Pacific Industrial Company Limited
• Original Assignee: Pacific Industrial Company Limited
• Inventors: Katou, Michiya, Hattori, Yasuaki
• Granted Patent: US 7,513,145 B2
• Time in Patent Office: Days
• US Class Current: 73/146.200
• 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 23/0433 Radio signals
• CPC Class Codes: B60C 23/0452 Antenna structure, control or arrangement vehicle tyre mounted antennas H01Q1/2241
• CPC Class Codes: B60C 23/0471 System initialisation, e.g. upload or calibration of operating parameters
• CPC Class Codes: B60C 23/0476 Temperature compensation of measured pressure values
• CPC Class Codes: B60C 23/0494 Valve stem attachments positioned inside the tyre chamber

Abstract

A tire pressure detecting device fixed to a wheel with a tire includes a pressure sensor detecting an internal pressure of the tire and transmits data of detection by the pressure sensor to a vehicle body by radio. The tire pressure detecting device further includes a compensation data storage storing compensation data for detection error specific to the pressure sensor and a compensation data transmitter obtaining the compensation data from the compensation data storage, transmitting the obtained compensation data to the vehicle body by radio.

Claims

1. A tire pressure detecting device fixed to a wheel with a tire and including a pressure sensor detecting an internal pressure of the tire, the device transmitting data of detection by the pressure sensor to a vehicle body by radio, the device comprising:

a compensation data storage storing compensation data for detection error specific to the pressure sensor; and

a compensation data transmitter obtaining the compensation data from the compensation data storage, transmitting the obtained compensation data to the vehicle body by radio.

2. The tire pressure detecting device of claim 1, further comprising a transponder including the compensation data storage and the compensation data transmitter and transmitting by radio the compensation data according to a radio signal delivered from the vehicle body side.

3. The tire pressure detecting device of claim 2, wherein the transponder is comprised of an RFID tag.

4. The tire pressure detecting device of claim 2, wherein the tire is provided with a tire valve to which the pressure sensor and the transponder are fixed.

5. The tire pressure detecting device of claim 3, wherein the tire is provided with a tire valve to which the pressure sensor and the transponder are fixed.

6. The tire pressure detecting device of claim 4, wherein the tire valve has an outer surface formed with a male thread and includes a ring member which is in threading engagement with the male thread, and the transponder is fixed to the ring member.

7. The tire pressure detecting device of claim 5, wherein the tire valve has an outer surface formed with a male thread and includes a ring member which is in threading engagement with the male thread, and the transponder is fixed to the ring member.

8. The tire pressure detecting device of claim 4, wherein the tire valve has a distal end to which a cap is attached, and the transponder is fixed to the cap.

9. The tire pressure detecting device of claim 5, wherein the tire valve has a distal end to which a cap is attached, and the transponder is fixed to the cap.

10. The tire pressure detecting device of claim 2, further comprising a detection data transmitter for transmitting the detection data by radio apart from the transponder.

11. The tire pressure detecting device of claim 3, further comprising a detection data transmitter for transmitting the detection data by radio apart from the transponder.

12. The tire pressure detecting device of claim 10, further comprising an identification data storage storing common identification data transmitted by the detection data transmitter and the transponder by radio.

13. The tire pressure detecting device of claim 11, further comprising an identification data storage storing common identification data transmitted by the detection data transmitter and the transponder by radio.

14. A tire monitor system for monitoring an inner pressure of the tire comprising:

a tire pressure detecting device fixed to a wheel with a tire and including a pressure sensor detecting an internal pressure of the tire, the device transmitting data of detection by the pressure sensor to a vehicle body by radio, the device including;

a compensation data storage storing compensation data for detection error specific to the pressure sensor; and

a compensation data transmitter obtaining the compensation data from the compensation data storage, transmitting the obtained compensation data to the vehicle body by radio; and

a tire receiver provided on the vehicle body for receiving the detection data and the compensation data from the tire pressure detecting device, compensating the detection data based on the compensation data.

15. The tire monitor system of claim 14, wherein the tire pressure detecting device further comprises a transponder including the compensation data storage and the compensation data transmitter and transmitting by radio the compensation data according to a radio signal delivered from the vehicle body side.

16. The tire monitor system of claim 15, wherein the transponder is comprised of an RFID tag.

17. The tire monitor system of claim 15, wherein the tire is provided with a tire valve to which the pressure sensor and the transponder are fixed.

18. The tire monitor system of claim 16, wherein the tire is provided with a tire valve to which the pressure sensor and the transponder are fixed.

19. The tire monitor system of claim 17, wherein the tire valve has an outer surface formed with a male thread and includes a ring member which is in threading engagement with the male thread, and the transponder is fixed to the ring member.

20. The tire monitor system of claim 17, wherein the tire valve has a distal end to which a cap is attached, and the transponder is fixed to the cap.

21. The tire monitor system of claim 15, wherein the tire pressure detecting device further comprises a detection data transmitter for transmitting the detection data by radio apart from the transponder.

22. The tire monitor system of claim 21, wherein the tire pressure detecting device further comprises an identification data storage storing common identification data transmitted by the detection data transmitter and the transponder by radio.

23. The tire monitor system of claim 21, further comprising:

a compensation data obtaining unit which is provided on the vehicle body for delivering a radio signal so that the transponder transmits the compensation data, thereby receiving the compensation data; and

a detection data processing unit which is provided on the vehicle body for receiving the detection data from the detection data transmitter and obtaining the compensation data from the compensation data obtaining unit, thereby compensating the detection data based on the compensation data.

24. The tire monitor system of claim 23, wherein the transponder is an RFID tag and the compensation data obtaining unit is a tag reader.

25. The tire monitor system of claim 24, wherein the compensation data obtaining unit is a tag reader/writer.