TIRE PRESSURE MONITORING SYSTEM (TPMS) MODULE LOCALIZATION USING BLUETOOTH LOW ENERGY BEACONS

• US 20190230615A1
• Filed: 01/23/2018
• Published: 07/25/2019
• Est. Priority Date: 01/23/2018
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: WERNER, Maximilian, KANDLER, Michael, SCHEIBENZUBER, Wolfgang
• Granted Patent: US 10,442,253 B2
• Time in Patent Office: Days
• CPC Class Codes: B60C 23/00 Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
• CPC Class Codes: B60C 23/02 Signalling devices actuated by tyre pressure hand-held tyre pressure gauges G01L17/00
• CPC Class Codes: B60C 23/04 mounted on the wheel or tyre
• 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 23/0416 allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
• CPC Class Codes: B60C 23/0422 characterised by the type of signal transmission means
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0447 Wheel or tyre mounted circuits
• CPC Class Codes: B60C 23/045 Means for detecting electromagnetic field changes being not part of the signal transmission per se, e.g. strength, direction, propagation or masking
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol
• CPC Class Codes: B60C 23/0488 Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04W 4/48 for in-vehicle communication
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

A tire pressure monitoring system (TPMS) includes a plurality of beacon transmitters each provided at different locations and each configured to transmit a plurality of beacons; a first TPMS sensor module configured to receive the plurality of beacons from each of the plurality of beacon transmitters, measure a signal strength of each of the plurality of beacons from each of the plurality of beacon transmitters, and transmit a signal including a first signal strength value for each of the plurality of beacon transmitters, each first signal strength value being representative of the measured signal strength of one or more of the plurality of beacons from a corresponding beacon transmitter of the plurality of beacon transmitters; and a control unit configured to receive the signal and determine a location of the first TPMS sensor module based on the first signal strength value for each of the plurality of beacon transmitters.

Claims

1. A tire pressure monitoring system (TPMS) sensor module, comprising:

a pressure sensor configured to measure an internal air pressure of a tire;

a receiver configured to receive a first plurality of beacons from a first beacon origin and measure a signal strength of each of the first plurality of beacons;

a microcontroller unit electrically connected to the receiver; and

a transmitter electrically connected to the microcontroller unit and configured to transmit a signal including a first signal strength value representative of the measured signal strength of one or more of the first plurality of beacons,

wherein;

the first plurality of beacons are received periodically on a one-by-one basis,

the microcontroller unit is configured to calculate a first average signal strength of one or more of the first plurality of beacons based on the measured signal strength of one or more of the first plurality of beacons, and

the transmitter is configured to transmit the signal, wherein the first average signal strength is provided as the first signal strength value, the transmitter is further configured to;

transmit the signal periodically in response to each instance one of the first plurality of beacons is received by the receiver, the first average signal strength being calculated based on a number of the first plurality of beacons thus far received,

delay transmission of the signal until a time period lapses, and then transmit the signal including the first average signal strength calculated based on all of the first plurality of beacons received during the time period, or

delay transmission of the signal until all of the first plurality of beacons have been received by the receiver, and then transmit the signal including the first average signal strength calculated based on all of the first plurality of beacons.

2. The TPMS sensor module of claim 1, wherein:

the microcontroller unit is configured to calculate the first average signal strength of the first plurality of beacons based on the measured signal strength of each of the first plurality of beacons.

3. The TPMS sensor module of claim 1, wherein:

each of the first plurality of beacons includes a first origin identifier corresponding to the first beacon origin, and

the transmitter is configured to transmit the signal including the first origin identifier and the first signal strength value.

4. The TPMS sensor module of claim 3, wherein the TPMS sensor has a TPMS identifier, and the transmitter is configured to transmit the TPMS identifier in the signal.

5. The TPMS sensor module of claim 1, wherein the receiver and the transmitter are integrated in a Bluetooth transceiver, and the first plurality of beacons are Bluetooth low energy (BLE) beacons.

6. A tire pressure monitoring system (TPMS) sensor module, comprising:

a pressure sensor configured to measure an internal air pressure of a tire;

a receiver configured to receive a first plurality of beacons from a first beacon origin and measure a signal strength of each of the first plurality of beacons;

a microcontroller unit electrically connected to the receiver; and

a transmitter electrically connected to the microcontroller unit and configured to transmit a signal including a first signal strength value representative of the measured signal strength of one or more of the first plurality of beacons,

wherein the receiver is configured to receive a second plurality of beacons from a second beacon origin and measure a signal strength of each of the second plurality of beacons, and

wherein the transmitter is configured to transmit the signal including the first signal strength value and a second signal strength value representative of the measured signal strength of one or more of the second plurality of beacons.

7. The TPMS sensor module of claim 6, wherein:

the microcontroller unit is configured to calculate a first average signal strength of the first plurality of beacons based on the measured signal strength of each of the first plurality of beacons,

the microcontroller unit is configured to calculate a second average signal strength of second plurality of beacons based on the measured signal strength of each of the second plurality of beacons, and

the transmitter is configured to transmit the signal including the first average signal strength and the second average signal strength, wherein the first average signal strength is provided as the first signal strength value, and the second average signal strength is provided as the second signal strength value.

8. The TPMS sensor module of claim 6, wherein:

each of the first plurality of beacons includes a first origin identifier corresponding to the first beacon origin,

each of the second plurality of beacons includes a second origin identifier corresponding to the second beacon origin, and

the transmitter is configured to transmit the signal including the first origin identifier, the first signal strength value mapped to the first origin identifier, the second origin identifier, and the second signal strength value mapped to the second origin identifier.

9. (canceled)

10. A tire pressure monitoring system (TPMS), comprising:

a plurality of beacon transmitters each provided at a different location and each configured to transmit a plurality of beacons;

a first TPMS sensor module configured to receive the plurality of beacons from each of the plurality of beacon transmitters, measure a signal strength of each of the plurality of beacons from each of the plurality of beacon transmitters, and transmit a signal including a first signal strength value for each of the plurality of beacon transmitters, each first signal strength value being representative of the measured signal strength of one or more of the plurality of beacons from a corresponding beacon transmitter of the plurality of beacon transmitters; and

a control unit configured to receive the signal and determine a location of the first TPMS sensor module based on the first signal strength value for each of the plurality of beacon transmitters.

11. The TPMS of claim 10, wherein:

the first TPMS sensor module configured to calculate a first average signal strength for each of the plurality of beacon transmitters based on the measured signal strength of each of the plurality of beacons from each of the plurality of beacon transmitters, wherein the first average signal strength for each of the plurality of beacon transmitters is provided as the first signal strength value for each of the plurality of beacon transmitters; and

the control unit is configured to receive the signal and determine the location of the first TPMS sensor module based on the first average signal strength for each of the plurality of beacon transmitters.

12. The TPMS of claim 10, wherein the control unit is configured with location information for each of the plurality of beacon transmitters, and is configured to determine the location of the first TPMS sensor module based on the first signal strength value for each of the plurality of beacon transmitters and the location information for each of the plurality of beacon transmitters.

13. The TPMS of claim 10, wherein:

each of the plurality of beacons from each of the plurality of beacon transmitters include a beacon identifier identifying a corresponding beacon transmitter of the plurality of beacon transmitters,

the first TPMS sensor module is configured to transmit the signal including the first signal strength value for each of the plurality of beacon transmitters and further including the beacon identifier for each of the plurality of beacon transmitters, each beacon identifier being mapped to the first signal strength value of the corresponding beacon transmitter, and

the control unit is configured determine the location of the first TPMS sensor module based on the first signal strength value and the beacon identifier for each of the plurality of beacon transmitters.

14. The TPMS of claim 10, wherein the first TPMS sensor module has a TPMS identifier,

the first TPMS sensor module is configured to transmit the signal including the first signal strength value for each of the plurality of beacon transmitters and further including the TPMS identifier, and

the control unit is configured associate the determined location of the first TPMS sensor module with the TPMS identifier.

15. The TPMS of claim 10, wherein the plurality of beacon transmitters are Bluetooth low energy (BLE) beacon transmitters, and the plurality of beacons from each of the plurality of beacon transmitters are BLE beacons.

16. The TPMS of claim 10, further comprising:

a second TPMS sensor module configured to receive the plurality of beacons from each of the plurality of beacon transmitters, measure the signal strength of each of the plurality of beacons from each of the plurality of beacon transmitters, and transmit another signal including a second signal strength value for each of the plurality of beacon transmitters, each second signal strength value being representative of the measured signal strength of one or more of the plurality of beacons from a corresponding beacon transmitter of the plurality of beacon transmitters,

wherein the control unit configured to receive the signal from the first TPMS sensor module and the other signal from the second TPMS sensor module, determine the location of the first TPMS sensor module based on the first signal strength value for each of the plurality of beacon transmitters transmitted by the first TPMS sensor module, and determine the location of the second TPMS sensor module based on the second signal strength value for each of the plurality of beacon transmitters transmitted by the second TPMS sensor module.

17. The TPMS of claim 16, wherein:

the control unit is configured to determine the location of the first TPMS sensor module based on the first signal strength value for each of the plurality of beacon transmitters transmitted by the first TPMS sensor module and based on the second signal strength value for each of the plurality of beacon transmitters transmitted by the second TPMS sensor module.

18. The TPMS of claim 16, wherein:

the control unit is configured with location information for each of the plurality of beacon transmitters, and the control unit is configured to determine the location of the first TPMS sensor module based the location information for each of the plurality of beacon transmitters, and determine the location of the second TPMS sensor module based the location information for each of the plurality of beacon transmitters.

19. The TPMS of claim 16, wherein:

the first TPMS sensor module is configured to calculate a first average signal strength for each of the plurality of beacon transmitters based on the measured signal strength of each of the plurality of beacons from each of the plurality of beacon transmitters, wherein the first average signal strength for each of the plurality of beacon transmitters is provided as the first signal strength value for each of the plurality of beacon transmitters,

the second TPMS sensor module is configured to calculate a second average signal strength for each of the plurality of beacon transmitters based on the measured signal strength of each of the plurality of beacons from each of the plurality of beacon transmitters, wherein the second average signal strength for each of the plurality of beacon transmitters is provided as the second signal strength value for each of the plurality of beacon transmitters, and

the control unit is configured to receive the signal from the first TPMS sensor module and the other signal from the second TPMS sensor module, determine the location of the first TPMS sensor module based on the first average signal strength for each of the plurality of beacon transmitters transmitted by the first TPMS sensor module, and determine the location of the second TPMS sensor module based on the second average signal strength for each of the plurality of beacon transmitters transmitted by the second TPMS sensor module.

20. The TPMS of claim 19, wherein each of the plurality of beacons from each of the plurality of beacon transmitters include a beacon identifier identifying a corresponding beacon transmitter of the plurality of beacon transmitters,

the first TPMS sensor module is configured to transmit the signal including the first average signal strength for each of the plurality of beacon transmitters and further including the beacon identifier for each of the plurality of beacon transmitters, each beacon identifier being mapped to the first average signal strength of the corresponding beacon transmitter,

the second TPMS sensor module is configured to transmit the other signal including the second average signal strength for each of the plurality of beacon transmitters calculated thereby and further including the beacon identifier for each of the plurality of beacon transmitters, each beacon identifier being mapped to the second average signal strength of the corresponding beacon transmitter, and

the control unit is configured determine the location of the first TPMS sensor module based on the first average signal strength and the beacon identifier for each of the plurality of beacon transmitters received in the signal, and determine the location of the second TPMS sensor module based on the second average signal strength and the beacon identifier for each of the plurality of beacon transmitters received in the other signal.