Procedure and facility for transmission between a control device and a wheel module

• US 7,876,206 B2
• Filed: 12/21/2004
• Issued: 01/25/2011
• Est. Priority Date: 04/01/2004
• Status: Active Grant

• Current Assignee: Conti Temic Microelectronic GmbH (Continental AG)
• Original Assignee: Conti Temic Microelectronic GmbH (Continental AG)
• Inventors: Lehmann, Jörg, Hahn, Karl-Heinz, Schillinger, Jakob
• Primary Examiner(s): Bugg; George A
• Assistant Examiner(s): LAU, HOI CHING
• Application Number:
  US11/547,224
• Publication Number:
  US 20080272900A1
• Time in Patent Office: 2,226 Days
• Field of Search: 340/447, 340/442, 340/825.49, 340/10.1, 340/444, 340/10.52, 340/445, 340/448, 340/10.3, 340/10.4, 731/46, 731/465, 116/34.R
• 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 23/0413 Wireless charging of active radio frequency circuits
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol

Abstract

The procedure and the facility are used for wireless transmission between a wheel module (9) arranged in a tire (2) and an external control device (3). A first transmission signal is transmitted from an antenna (6) of the control device (3) to an antenna (11) of the wheel module (9). Data is transmitted via a second transmission signal from the wheel module (9) to the control device (3), whereby the first transmission signal has a different frequency from the second transmission signal. The first transmission signal is received by the antenna (11) of the wheel module (9) during a coupling period, within which while the tires (2) are rotating, an area of influence (15) of the antenna (11) of the wheel module (9) which also rotates, and a stationary area of influence (14) of the antenna (6) of the control device (3) overlap. After the beginning of the coupling period is recognised, the data transmission is started from the wheel module (9) to the control device (3).

Claims

1. A procedure for wireless transmission between a wheel module (9) arranged in a tire (2) and a control device (3;

28) arranged outside the tire (2), the method comprising;

transferring a first transmission signal (S1) from an antenna (6) of the control device (3;

28) to an antenna (11) of the wheel module (9);

transmitting data via a second transmission signal (S2) from the wheel module (9) to the control device (3;

28), wherein a different frequency is provided for the first transmission signal (S1) than for the second transmission signal (S2);

receiving by the antenna (11) of the wheel module the first transmission signal (S1), during a coupling period (TK) within which when the tires (2) are rotating, an also rotating sphere of influence (15) of the antenna (11) of the wheel module (9) and a stationary sphere of influence (14) of the antenna (6) of the control device (3;

28) partially overlap; and

recognizing a beginning of the coupling period (TK) is recognised by the wheel module (9), wherein the transmission of data from the wheel module (9) to the control device (3;

28) is started after the coupling period (TK) begins, wherein a speed of the tire (2) or a size which is proportional to it is recorded and compared with a speed threshold value, and the second transmission signal (S2) can be transmitted with an extended data telegram in particular only when the speed threshold value is not reached.

2. A procedure according to claim 1, wherein the frequency (1) of the first transmission signal (S1) is lower than the frequency of the second transmission signal (S2).

3. A procedure according to claim 1, wherein power is gained from the first transmission signal in order to supply the wheel module (9).

4. A procedure according to claim 3, wherein with the power gained, a power storage unit (22) is charged and the data transmission from the wheel module (9) to the control device (3;

28) is started after a prespecified charging condition (LMAX) of the power storage unit (22) has been started.

5. A procedure according to claim 4, wherein the second transmission signal (S2) is transmitted with an extended data telegram when the power storage unit (22), assuming that a significant discharge has occurred, has achieved the prespecified charging condition (LMAX).

6. A procedure according to claim 5, wherein the second transmission signal (S2) is transmitted with a standard data telegram when a charging condition (L) of the power storage unit has not fallen below a prespecified charging condition threshold value (LMIN) since the previous data transmission from the wheel module (9) to the control device (3;

28).

7. A procedure according to claim 1, wherein the first transmission signal (S1) is transmitted from the control device (3;

28) at least partially overriding several coupling periods (TK).

8. A procedure according to claim 1, wherein data from the control device (3;

28) to the wheel module (9) is transmitted by means of the control device (3;

28);

after an at least partial reception of the second transmission signal (S2) in the first transmission signal (S1), a prespecified interruption is executed, or a prespecified zero sequence is transmitted;

the first transmission signal (S1) is then loaded with the data to be transmitted from the control device (3;

28) to the wheel module (9) and in the wheel module (9);

the interruption or zero sequence is recognised in the first transmission signal (S1); and

the first transmission signal (S1) is received with the data from the control device (3;

28).

9. A procedure according to claim 1, wherein the first and the second transmission signal (S1, S2) is transmitted or received using a ground antenna (29) of the control device (28) arranged in a road surface (30).

10. A procedure for wireless transmission between a wheel module (9) arranged in a tire (2) and a control device (3;

28) arranged outside the tire (2), the method comprising;

transferring a first transmission signal (S1) from an antenna (6) of the control device (3;

28) to an antenna (11) of the wheel module (9);

transmitting data via a second transmission signal (S2) from the wheel module (9) to the control device (3;

28), wherein a different frequency is provided for the first transmission signal (S1) than for the second transmission signal (S2);

receiving by the antenna (11) of the wheel module the first transmission signal (S1), during a coupling period (TK) within which when the tires (2) are rotating, an also rotating sphere of influence (15) of the antenna (11) of the wheel module (9) and a stationary sphere of influence (14) of the antenna (6) of the control device (3;

28) partially overlap; and

recognizing a beginning of the coupling period (TK) is recognised by the wheel module (9), wherein the transmission of data from the wheel module (9) to the control device (3;

28) is started after the coupling period (TK) begins, wherein a current measured value of at least one tire condition sensor (24, 25, 26) which is arranged in the tire (2) is transmitted using standard data telegrams which are included in the second transmission signal (S2) from the wheel module (9) to the control device (3;

28).

11. A procedure for wireless transmission between a wheel module (9) arranged in a tire (2) and a control device (3;

28) arranged outside the tire (2), the method comprising;

transferring a first transmission signal (S1) from an antenna (6) of the control device (3;

28) to an antenna (11) of the wheel module (9);

transmitting data via a second transmission signal (S2) from the wheel module (9) to the control device (3;

28), wherein a different frequency is provided for the first transmission signal (S1) than for the second transmission signal (S2);

receiving by the antenna (11) of the wheel module the first transmission signal (S1), during a coupling period (TK) within which when the tires (2) are rotating, an also rotating sphere of influence (15) of the antenna (11) of the wheel module (9) and a stationary sphere of influence (14) of the antenna (6) of the control device (3;

28) partially overlap; and

recognizing a beginning of the coupling period (TK) is recognised by the wheel module (9), wherein the transmission of data from the wheel module (9) to the control device (3;

28) is started after the coupling period (TK) begins, wherein a current measured value of at least one tire condition sensor (24, 25, 28) arranged in the tire (2) together with a set value for this measured value or with a characteristic identification of the tires (2) is transmitted using extended data telegrams included in the second transmission signal (S2) from the wheel module (9) to the control device (3;

28).