KR101181235B1

KR101181235B1 - Tire pressure monitoring system and method of realizing auto location using the same

Info

Publication number: KR101181235B1
Application number: KR20100072211A
Authority: KR
Inventors: 정지현; 허성준
Original assignee: 주식회사 만도
Priority date: 2010-07-27
Filing date: 2010-07-27
Publication date: 2012-09-10
Also published as: KR20120010711A

Abstract

The present invention relates to a tire pressure monitoring system for implementing auto location using two external antennas in a tire pressure monitoring system and an auto location realization method using the same.
To this end, the present invention, when a plurality of TPMS sensor module mounted on each tire of the vehicle detects the information of each tire and transmits a signal, and compares the signal strength received by receiving the transmitted signal through one or more external antennas, By dividing the signal with the largest signal strength and the second largest signal, by realizing the auto location of TPMS sensor modules, the reception rate can be improved and the ECU size of the TPMS receiver can be reduced.

Description

TIRE PRESSURE MONITORING SYSTEM AND METHOD OF REALIZING AUTO LOCATION USING THE SAME

The present invention relates to a tire pressure monitoring system for implementing auto location using two external antennas in a tire pressure monitoring system and an auto location realization method using the same.

In general, a tire mounted on a vehicle has a function of a spring and a damper that transmits a driving force, a braking force, a lateral force, etc. of the vehicle to the road surface while supporting the load of the vehicle from the road surface, and alleviates the impact on the road surface.

If the tire pressure is too high or too low, the tire may burst or the vehicle may slip easily, leading to a major accident. In addition, fuel consumption is increased, fuel economy is deteriorated, tire life is shortened, ride comfort and braking power are also reduced.

A safety device mounted on a vehicle to prevent such a tire defect is a tire pressure monitoring system (TPMS). The tire pressure monitoring system is designed to detect the pressure and temperature of the tire with the TPMS sensor module mounted on the tire and send this information to the driver so that the driver can check the tire pressure in real time. The tire pressure monitoring system not only improves tire durability, ride comfort and braking power, but also improves fuel economy and prevents the vehicle body from shaking violently while driving.

The tire pressure monitoring system (TPMS) is equipped with a TPMS sensor module that detects the tire air pressure and temperature, etc. on each tire of the vehicle, and receives the information of each tire detected through the TPMS sensor module to determine whether the tire is normal. Mount the TPMS receiver inside the vehicle to determine. A signal is transmitted between the TPMS sensor module and the TPMS receiver by wireless communication. The signal transmitted from the TPMS sensor module is received through an antenna and transmitted to the TPMS receiver.

When receiving the signal transmitted from the TPMS sensor module mounted on each tire of the vehicle through the antenna, the process of determining the position of the TPMS sensor module is required because the TPMS receiver does not know which signal is transmitted from the TPMS sensor module. This is called auto location.

Conventionally, in order to implement an auto location, a separate signal transmitter (LFI) is used to transmit an instruction signal for the operation of the TPMS sensor module to a specific TPMS sensor module, and determine the position by checking the response of the TPMS sensor module. However, since the signal transmitters must be separately provided in response to the TPMS sensor module, the labor man-hours increase and the economic burden is accompanied.

The present invention proposes a tire pressure monitoring system capable of implementing auto location using two external antennas in a tire pressure monitoring system, and a method for implementing an auto location using the same.

To this end, the tire pressure monitoring system according to an embodiment of the present invention includes a plurality of TPMS sensor modules respectively mounted on the vehicle tire to detect information of the vehicle tire and transmit a signal; At least one external antenna for receiving signals transmitted from the plurality of TPMS sensor modules; It includes a TPMS receiver for measuring the signal strength received through at least one external antenna to determine the location of the TPMS sensor module by distinguishing the signal with the largest signal strength and the second largest signal.

One or more external antennas include a first external antenna mounted proximate to one of the four tires installed in the vehicle, and a second external antenna mounted proximate to the other one of the four tires.

One tire and the other tire are characterized by consisting of tires located on the same line in the vehicle.

One tire is a right front wheel tire FR, and the other tire is a left front wheel tire FL.

One tire is a right rear wheel tire RR, and the other is a left rear wheel tire RL.

One tire and the other tire are characterized by consisting of tires located diagonally in the vehicle.

One tire is a right front wheel tire FR, and the other tire is a left rear wheel tire RL.

One tire is characterized by a left front wheel tire FL and the other tire being a right rear wheel tire RR.

In addition, the tire pressure monitoring system according to an embodiment of the present invention, between the first and second external antenna and the TPMS receiver is provided with one or more switches electrically connecting them, the TPMS receiver controls the switch to the first and second It is characterized by selectively operating the two external antennas.

In addition, the method for implementing an auto location of a tire pressure monitoring system according to an embodiment of the present invention includes: detecting a tire information and transmitting a signal from a TPMS sensor module mounted on four tires installed in a vehicle; Receiving signals transmitted from four TPMS sensor modules through a first external antenna to measure signal strengths; Determining positions of two TPMS sensor modules among the four TPMS sensor modules by using the signal having the largest intensity and the second largest signal received through the first external antenna; Receiving signals transmitted from four TPMS sensor modules through a second external antenna and measuring signal strengths; And determining the positions of the remaining two TPMS sensor modules among the four TPMS sensor modules using the signal having the greatest intensity and the second largest signal received through the second external antenna.

As described above, a simple logic configuration using two external antennas in the tire pressure monitoring system may improve the reception rate by implementing auto location, and reduce the ECU size of the TPMS receiver.

1 is an overall configuration diagram of a tire pressure monitoring system according to an embodiment of the present invention.
2 is a control block diagram for implementing an auto location in the tire pressure monitoring system according to an embodiment of the present invention.
FIG. 3 is a control block diagram illustrating an example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 2.
4 is a control block diagram illustrating another example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 2.
FIG. 5 is a flowchart illustrating a method of implementing auto location in the tire pressure monitoring system of FIG. 2.
6 is a control block diagram for implementing an auto location in the tire pressure monitoring system according to another embodiment of the present invention.
FIG. 7 is a control block diagram illustrating an example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 6.
FIG. 8 is a control block diagram illustrating another example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 6.
FIG. 9 is a flowchart illustrating a method of implementing auto location in the tire pressure monitoring system of FIG. 6.
10 is a control block diagram for implementing an auto location in the tire pressure monitoring system according to another embodiment of the present invention.
11 is a control block diagram for implementing an auto location in the tire pressure monitoring system according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is an overall configuration diagram of a tire pressure monitoring system according to an embodiment of the present invention.

In FIG. 1, a tire pressure monitoring system according to an exemplary embodiment of the present invention includes a plurality of (eg, four) TPMS sensor modules mounted on each tire FR, FL, RR, and RL of the vehicle 1. (11, 12, 13, 14), the external antenna (21, 22) for receiving a signal transmitted from the plurality of TPMS sensor modules (11, 12, 13, 14), and receives through the external antenna (21, 22) The TPMS receiver 30 determines whether the tires FR, FL, RR, and RL are normal by receiving sensor information of each of the tires FR, FL, RR, and RL.

The external antennas 21 and 22 may receive all of the signals transmitted from the plurality of TPMS sensor modules 11, 12, 13, and 14, and may be made of micro dipoles having a size smaller than the frequency wavelength of the received signal. dipole) antenna can be used. Due to the characteristics of the micro dipole antenna having a very small radiation resistance, as the Q value (goodness of a lossy reactance element or resonant circuit) increases, the energy stored around the antenna becomes larger than the radiation energy.

Therefore, in the case of the external antennas 21 and 22 using the micro dipole antenna, since the signal strength can be distinguished with respect to the received signals, the strength of the signal transmitted from a nearer place is relatively large.

As shown in FIG. 1, since the external antennas 21 and 22 are mounted at positions close to two tires among the four tires FR, FL, RR, and RL, signals received by the external antennas 21 and 22 are provided. The intensity of the signals is not the same, and the received signal strength varies according to the distance between the external antennas 21 and 22 and the TPMS sensor modules 11, 12, 13, and 14.

The TPMS receiver 30 is mounted inside the vehicle 1 to receive sensor information of each tire FR, FL, RR, and RL received through the external antennas 21 and 22.

2 is a control block diagram for implementing an auto location in the tire pressure monitoring system according to an embodiment of the present invention.

In FIG. 2, the plurality of TPMS sensor modules 11, 12, 13, and 14 are sensor units 11-1 and 12-1 that detect pressure, temperature, acceleration, and the like of the corresponding tires FR, FL, RR, and RL. 13-1, 14-1 and the sensor unit 11-1, 12-1, 13-1, 14-1 to wirelessly transmit the sensor information, such as tire pressure, temperature, acceleration detected through the Communication units 11-2, 12-2, 13-2, and 14-2, respectively.

In addition, the plurality of TPMS sensor modules (11, 12, 13, 14) has a battery (not shown) to be driven and supplied with its own power, each tire (FR, FL, RR, RL) information is always sent out. In this case, the plurality of TPMS sensor modules 11, 12, 13, and 14 wirelessly transmit the sensor signals detected together with their sensor IDs.

The external antennas 21 and 22 are the first external antenna 21 mounted at a position close to the right front wheel tire FR among the four tires FR, FL, RR, and RL, and the left front wheel tire FL. And a second external antenna 22 mounted at a position close to the second antenna.

The first external antenna 21 is mounted to be exposed to the outside of the vehicle 1 at a position where the relative distance to the right front tire FR is closer than the relative distance to the other tires FL, RR, and RL, and the second external antenna ( 22 is mounted such that the relative distance to the left front wheel tire FL is closer to the outside of the vehicle 1 than the relative distance to the other tires FR, RR, and RL.

The TPMS receiver 30 includes a signal strength measuring unit 31 measuring strength of sensor signals received through the first and second external antennas 21 and 22 and a sensor measured by the signal strength measuring unit 31. It includes a control unit 32 for determining the position of the TPMS sensor module (11, 12, 13, 14) mounted on each tire (FR, FL, RR, RL) of the vehicle 1 in accordance with the signal strength.

The signal strength measuring unit 31 measures the intensity of the sensor signal received through the first and second external antennas 21 and 22. In this case, the signal strength measuring unit 31 may use RSSI (Received Signal Strength Indicator) as a method of measuring signal strength.

The controller 32 is an ECU that distinguishes the signal having the largest signal strength (receive power) from the second largest signal by comparing the strengths of the sensor signals measured by the signal strength measuring unit 31, and the TPMS sensor module 11, 12, 13, 14) to determine the location of the auto location.

The tire pressure monitoring system of the present invention uses the same number of first and second switches 41 and 42 as the number of first and second external antennas 21 and 22 for the implementation of the auto location.

One end of the first and second switches 41 and 42 is electrically connected to the first and second external antennas 21 and 22, respectively, and the other end thereof is connected to the TPMS receiver 30. The first and second switches 41 and 42 are controlled by the control unit 32 of the TPMS receiver 30.

When the first switch 41 is turned on by the control unit 32, the signals transmitted from the plurality of TPMS sensor modules 11, 12, 13, and 14 are received through the first external antenna 21. The signal strength of the received sensor signals is measured by the signal strength measuring unit 31 and transmitted to the control unit 32.

Similarly, when the second switch 42 is turned on by the control unit 32, the signals transmitted from the plurality of TPMS sensor modules 11, 12, 13, and 14 are received through the second external antenna 22. The signal strength of the received sensor signals is measured by the signal strength measuring unit 31 and transmitted to the controller 32.

As such, the first and second external antennas 21 and 22 may receive all signals transmitted from the plurality of TPMS sensor modules 11, 12, 13, and 14.

FIG. 3 is a control block diagram illustrating an example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 2.

In FIG. 3, the first external antenna 21 mounted at a position close to the right front wheel tire FR receives all the signals transmitted from the four TPMS sensor modules 11, 12, 13, and 14 and receives the TPMS receiver. Transfer to 30.

Accordingly, the TPMS receiver 30 compares the strengths of the sensor signals received through the first external antenna 21 from the four TPMS sensor modules 11, 12, 13, and 14.

As a result of comparing the strengths of the signals received by the first external antenna 21, the TPMS sensor having a different distance D1 between the TPMS sensor module 11 mounted on the right front wheel FR and the first external antenna 21 is different. The signal strength (receive power) is greatest because it is relatively close relative to the modules 12, 13, 14. On the other hand, the distance D2 of the TPMS sensor module 13 and the first external antenna 21 mounted on the right rear tire RR is the distance D1 of the TPMS sensor module 11 and the first external antenna 21. Longer signal strength, but compared to the TPMS sensor modules 12 and 14 mounted on the left side of the vehicle 1 in an environment in which the first external antenna 21 exposed on the right side of the vehicle 1 receives a signal. The signal strength is large.

That is, the signal strength of the TPMS sensor module 11 mounted on the right front tire FR is the largest among the signals received by the first external antenna 21 and the TPMS sensor module 13 mounted on the right rear tire RR. ) Is the second largest signal strength. Accordingly, the position of two TPMS sensor modules 11 and 13 of the four TPMS sensor modules 11, 12, 13, and 14 may be determined using one first external antenna 21.

4 is a control block diagram illustrating another example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 2.

In FIG. 4, the second external antenna 22 mounted at a position close to the left front wheel tire FL receives all the signals transmitted from the four TPMS sensor modules 11, 12, 13, and 14 and receives the TPMS receiver. Transfer to 30.

Accordingly, the TPMS receiver 30 compares the strengths of the sensor signals received through the second external antenna 22 from the four TPMS sensor modules 11, 12, 13, and 14.

As a result of comparing the intensities of the signals received by the second external antenna 22, the TPMS sensor having a different distance D1 between the TPMS sensor module 12 mounted on the left front wheel tire FL and the second external antenna 22 is different. The signal strength (receive power) is greatest because it is relatively close to the modules 11, 13, 14. On the other hand, the distance D2 between the TPMS sensor module 14 and the second external antenna 22 mounted on the left rear wheel tire RL is the distance D1 of the TPMS sensor module 12 and the second external antenna 22. Longer signal strength, but compared to the TPMS sensor modules 11 and 13 mounted on the right side of the vehicle 1 in an environment in which the second external antenna 22 exposed to the left side of the vehicle 1 receives a signal. The signal strength is large.

That is, the signal strength of the TPMS sensor module 12 mounted to the left front wheel tire FL is the largest among the signals received by the second external antenna 21, and the TPMS sensor module 14 mounted to the left rear wheel tire RL. ) Is the second largest signal strength. Accordingly, the position of two TPMS sensor modules 12 and 14 among the four TPMS sensor modules 11, 12, 13, and 14 may be determined using one second external antenna 22.

FIG. 5 is a flowchart illustrating a method of implementing auto location in the tire pressure monitoring system of FIG. 2.

In FIG. 5, the TPMS receiver 30 turns on the first switch 41 by the controller 32 and turns off the second switch 42 to implement auto location in the tire pressure monitoring system. (100).

When the first switch 41 is turned on, the four TPMS sensor modules 11 and 12 may be mounted on the first external antenna 21 mounted at a position close to the right front tire FR of the vehicle 1. 13 and 14 receive all signals transmitted from the transmission to the TPMS receiver 30 (102).

Accordingly, the TPMS receiver 30 measures the signal strength of the four sensor signals received from the four TPMS sensor modules 11, 12, 13, and 14 through the first external antenna 21 in the signal strength measuring unit 31. The measurement is transmitted to the control unit 32.

Accordingly, the controller 32 compares the strength of the sensor signals measured by the signal strength measuring unit 31 (104), and distinguishes the signal having the largest signal strength (receive power) from the second largest signal as follows. Perform auto location.

That is, the control unit 32 compares the strength of the signals received by the first external antenna 21 and the TPMS sensor module 11 having the largest signal strength (receive power) is the right front wheel tire FR of the vehicle 1. It is determined that the TPMS sensor module 13, the second largest signal strength (receive power) is mounted on the right rear tire RR of the vehicle 1 performs the auto location (106). .

As described above, after determining the positions of the TPMS sensor modules 11 and 13 mounted on the right front wheel tire FR and the right rear wheel tire RR of the vehicle 1, the control unit 32 controls the first switch 41. OFF and the second switch 42 is turned ON (108).

When the second switch 42 is turned on, four TPMS sensor modules 11 and 12 may be mounted on the second external antenna 22 mounted at a position close to the left front wheel FL of the vehicle 1. 13 and 14 receive all signals transmitted from the transmission to the TPMS receiver 30 (110).

Accordingly, the TPMS receiver 30 measures the signal strength of the four sensor signals received from the four TPMS sensor modules 11, 12, 13, and 14 through the second external antenna 22 in the signal strength measuring unit 31. The measurement is transmitted to the control unit 32.

Accordingly, the control unit 32 compares the strength of the sensor signals measured by the signal strength measuring unit 31 (112), and distinguishes the signal having the largest signal strength (receive power) from the second largest signal as follows. Perform auto location.

That is, the control unit 32 compares the strengths of the signals received by the second external antenna 22 and the TPMS sensor module 12 having the largest signal strength (receive power) is the left front wheel tire FL of the vehicle 1. It is determined that the TPMS sensor module 14, the second largest signal strength (receive power) is mounted on the left rear tire RL of the vehicle 1 performs the auto location (114). .

As such, the positions of the TPMS sensor modules 12 and 14 mounted on the left front wheel tire FL and the left rear wheel tire RL of the vehicle 1 are determined to determine the tires FR, FL, RR, It is possible to implement an auto location to determine all the positions of the four TPMS sensor modules (11, 12, 13, 14) respectively mounted on the RL.

In FIGS. 2 to 5, a case in which two external antennas 21 and 22 are mounted close to both front wheel tires FR and FL of the vehicle 1 has been described. Hereinafter, two external antennas 21 and 22 will be described. 6) will be described with reference to FIGS. 6 to 9 when the vehicle 1 is mounted close to both rear tires RR and RL of the vehicle 1.

6 is a control block diagram for implementing an auto location in the tire pressure monitoring system according to another embodiment of the present invention, the same reference numerals and the same names will be omitted for the same parts as in FIG. .

In FIG. 6, the external antennas 21 and 22 include a first external antenna 21 mounted close to the right rear wheel tire RR among the four tires FR, FL, RR, and RL, and a left rear wheel tire RL. It is composed of a second external antenna 22 mounted in close proximity to the).

The first external antenna 21 is mounted to be exposed to the outside of the vehicle 1 at a position where the relative distance to the right rear tire RR is closer than the relative distance to other tires FR, FL, and RL, and the second external antenna ( 22 is mounted such that the relative distance to the left rear wheel tire RL is exposed to the outside of the vehicle 1 at a position closer than the relative distance to the other tires FR, FL, and RR.

FIG. 7 is a control block diagram illustrating an example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 6.

In FIG. 7, the first external antenna 21 mounted at a position close to the right rear tire RR receives all signals transmitted from the four TPMS sensor modules 11, 12, 13, and 14, thereby receiving the TPMS receiver 30. To be sent).

As a result of comparing the intensities of the signals received by the first external antenna 21, the TPMS sensor having a different distance D1 between the TPMS sensor module 13 mounted on the right rear tire RR and the first external antenna 21 is different. The signal strength (receive power) is greatest because it is relatively close to the modules 11, 12, 14. On the other hand, the distance D2 between the TPMS sensor module 11 and the first external antenna 21 mounted on the right front wheel tire FR is the distance D1 between the TPMS sensor module 13 and the first external antenna 21. Longer signal strength, but compared to the TPMS sensor modules 12 and 14 mounted on the left side of the vehicle 1 in an environment in which the first external antenna 21 exposed on the right side of the vehicle 1 receives a signal. The signal strength is large.

That is, the signal strength of the TPMS sensor module 13 mounted on the right rear tire RR is the largest among the signals received by the first external antenna 21 and the TPMS sensor module 11 mounted on the right front tire FR. ) Is the second largest signal strength. Accordingly, the position of two TPMS sensor modules 11 and 13 of the four TPMS sensor modules 11, 12, 13, and 14 may be determined using one first external antenna 21.

FIG. 8 is a control block diagram illustrating another example of an auto location for determining two positions of a TPMS sensor module using one external antenna in the tire pressure monitoring system of FIG. 6.

In FIG. 8, the second external antenna 22 mounted at a position close to the left rear wheel tire RL receives all signals transmitted from the four TPMS sensor modules 11, 12, 13, and 14, thereby receiving the TPMS receiver 30. To be sent).

As a result of comparing the strengths of the signals received by the second external antenna 22, the TPMS sensor having a different distance D1 between the TPMS sensor module 14 mounted on the left rear wheel tire RL and the second external antenna 22 is different. The signal strength (receive power) is the largest because it is relatively close to the modules 11, 12, 13. On the other hand, the distance D2 of the TPMS sensor module 12 and the second external antenna 22 mounted on the left front wheel tire FL is the distance D1 of the TPMS sensor module 14 and the second external antenna 22. Longer signal strength, but compared to the TPMS sensor modules 11 and 13 mounted on the right side of the vehicle 1 in an environment in which the second external antenna 22 exposed to the left side of the vehicle 1 receives a signal. The signal strength is large.

That is, the signal strength of the TPMS sensor module 14 mounted on the left rear wheel tire RL is the largest among the signals received by the second external antenna 22, and the TPMS sensor module 12 mounted on the left front wheel tire FL. ) Is the second largest signal strength. Accordingly, the position of two TPMS sensor modules 12 and 14 among the four TPMS sensor modules 11, 12, 13, and 14 may be determined using one second external antenna 22.

FIG. 9 is a flowchart illustrating a method of implementing auto location in the tire pressure monitoring system of FIG. 6.

In FIG. 9, the TPMS receiver 30 turns on the first switch 41 by the control unit 32 and turns off the second switch 42 to implement auto location in the tire pressure monitoring system. (200).

When the first switch 41 is turned on, the four TPMS sensor modules 11, 12, 13, and the first external antenna 21 mounted at a position close to the right rear wheel tire RR of the vehicle 1 are provided. Receive all signals transmitted from 14 and transmits to the TPMS receiver 30 (202).

Accordingly, the control unit 32 compares the strength of the sensor signals measured by the signal strength measuring unit 31 (204), and distinguishes the signal having the largest signal strength (receive power) and the second largest signal as follows. Perform auto location.

That is, the control unit 32 compares the strengths of the signals received by the first external antenna 21 and the TPMS sensor module 13 having the largest signal strength (receive power) is the right rear tire RR of the vehicle 1. In operation 206, the TPMS sensor module 11 having the second largest signal strength (receive power) is mounted on the right front tire FR of the vehicle 1. .

In this way, after determining the positions of the TPMS sensor modules 11 and 13 mounted on the right rear wheel tire RR and the right front wheel tire FR of the vehicle 1, the control unit 32 controls the first switch 41. OFF and the second switch 42 is turned ON (208).

When the second switch 42 is turned on, the four TPMS sensor modules 11, 12, 13, and the second external antenna 22 mounted near the left rear wheel tire RL of the vehicle 1 are mounted. Receive all signals transmitted from 14) and transmits to the TPMS receiver 30 (210).

Accordingly, the controller 32 compares the strengths of the sensor signals measured by the signal strength measuring unit 31 (212), and divides the signal having the largest signal strength (receive power) and the second largest signal as follows. Perform auto location.

That is, the control unit 32 compares the strengths of the signals received by the second external antenna 22 and the TPMS sensor module 14 having the largest signal strength (receive power) is the rear rear tire RL of the vehicle 1. In operation 214, the TPMS sensor module 12 having the second largest signal strength (receive power) is determined to be mounted on the left front tire FL of the vehicle 1. .

As such, the positions of the TPMS sensor modules 12 and 14 mounted on the left rear wheel tire RL and the left front wheel tire FL of the vehicle 1 are determined to determine the tires FR, FL, RR, It implements an auto location for determining all the positions of the four TPMS sensor modules (11, 12, 13, 14) respectively mounted on the RL.

FIG. 10 is a control block diagram for implementing an auto location in a tire pressure monitoring system according to another embodiment of the present invention, and the same parts as in FIGS. 2 and 6 will be described using the same reference numerals and the same name. It will be omitted.

In FIG. 10, the external antennas 21 and 22 include a first external antenna 21 mounted close to the right front wheel tire FR among four tires FR, FL, RR, and RL, and a left rear wheel tire RL. It is composed of a second external antenna 22 mounted in close proximity to the).

The first external antenna 21 is mounted to be exposed to the outside of the vehicle 1 at a position where the relative distance to the right front tire FR is closer than the relative distance to the other tires FL, RR, and RL, and the second external antenna ( 22 is mounted such that the relative distance to the left rear wheel tire RL is exposed to the outside of the vehicle 1 at a position closer than the relative distance to the other tires FR, FL, and RR.

FIG. 11 is a control block diagram for implementing an auto location in a tire pressure monitoring system according to another embodiment of the present invention, and the same reference numerals and the same names are used for the same parts as in FIGS. 2 and 6. It will be omitted.

In FIG. 11, the external antennas 21 and 22 are the first external antenna 21 mounted close to the left front wheel tire FL among the four tires FR, FL, RR, and RL, and the right rear wheel tire RR. It is composed of a second external antenna 22 mounted in close proximity to the).

The first external antenna 21 is mounted to be exposed to the outside of the vehicle 1 at a position where the relative distance to the left front wheel tire FL is closer than the relative distance to other tires FR, RR and RL, and the second external antenna ( 22 is mounted such that the relative distance to the right rear wheel tire RR is closer to the outside of the vehicle 1 at a position closer than the relative distance to the other tires FR, FL, and RL.

11, 12, 13, 14: TPMS sensor module 21, 22: external antenna
30: TPMS receiver 31: signal strength measuring unit
32: control unit 41, 42: switch

Claims

A plurality of TPMS sensor modules respectively mounted on the vehicle tire to detect information of the vehicle tire and to transmit a signal;
A plurality of external antennas which receive signals transmitted from the plurality of TPMS sensor modules and are mounted in proximity to one tire of one of the left tires of the vehicle and one of the right tires of the vehicle;
By selectively operating the plurality of external antennas to measure the signal strength received through the plurality of external antennas, and distinguishing the signal with the largest signal strength and the second largest signal, the front tire of the vehicle and the rear tire of the vehicle Tire pressure monitoring system including a TPMS receiver for determining the position of the TPMS sensor module mounted on the.

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The method of claim 1,
And a tire of one of the left tires of the vehicle and one of the right tires of the vehicle are tires that are co-located in the vehicle.

The method of claim 3,
The tire pressure monitoring system of one of the right tires of the vehicle is a right front wheel tire (FR), and one of the left tires of the vehicle is a left front wheel tire (FL).

The method of claim 3,
The tire pressure monitoring system of one of the right tires of the vehicle is a right rear wheel tire (RR) and one of the left tires of the vehicle is a left rear wheel tire (RL).

The method of claim 1,
And a tire of one of the left tires of the vehicle and one of the right tires of the vehicle, the tire being positioned diagonally in the vehicle.

The method of claim 6,
The tire pressure monitoring system of one of the right tires of the vehicle is a right front wheel tire (FR), and one of the left tires of the vehicle is a left rear wheel tire (RL).

The method of claim 6,
The tire pressure monitoring system of one of the right tires of the vehicle is a right rear wheel tire (RR), and one of the left tires of the vehicle is a left front wheel tire (FL).

delete

Transmitting a signal by detecting information of the corresponding tire in the TPMS sensor module mounted on each of the four tires installed in the vehicle;
Measuring the intensity of the signal by receiving the signals transmitted from the four TPMS sensor modules through a first external antenna mounted on one of the left tires of the vehicle;
The position of the TPMS sensor module mounted on the front tire and the rear tire of the left side of the vehicle by using the signal having the greatest intensity and the second largest signal received through the first external antenna. Determining;
Receiving the signals transmitted from the four TPMS sensor modules through a second external antenna mounted on one of the right tires of the vehicle and measuring the strength of the signals;
The position of the TPMS sensor module mounted on the right front tire and the rear tire of the vehicle among the four TPMS sensor modules using the signal having the greatest intensity and the second largest signal received through the second external antenna. Auto location implementation method of the tire pressure monitoring system comprising the step of determining.

Transmitting a signal by detecting information of the corresponding tire in a TPMS sensor module mounted on each of the four tires installed in the vehicle;
Receiving the signals transmitted from the four TPMS sensor modules through a first external antenna mounted on one of the right tires of the vehicle to measure the strength of the signals;
Position of the TPMS sensor module mounted on the front and rear tires of the right side of the vehicle among the four TPMS sensor modules by using the signal having the greatest intensity and the second largest signal received through the first external antenna. Determining;
Receiving the signals transmitted from the four TPMS sensor modules through a second external antenna mounted on one of the left tires of the vehicle and measuring the strength of the signals;
The position of the TPMS sensor module mounted on the left front tire and the rear tire of the vehicle among the four TPMS sensor modules using the signal having the greatest intensity and the second largest signal received through the second external antenna. Auto location implementation method of the tire pressure monitoring system comprising the step of determining.