Tire Pressure Monitoring System (tpms) module localization using Bluetooth low energy beacons

Abstract

A tire pressure monitoring system (TPMS) comprising: a plurality of beacon transmitters each disposed at a different location and each configured to transmit a plurality of beacons; a first TPMS sensor module configured to transmit signals from the plurality of beacons Each beacon transmitter in the transmitter receives a plurality of beacons, measures the signal strength of each of the plurality of beacons from each of the plurality of beacon transmitters, and transmits a plurality of a signal of a first signal strength value for each of the beacon transmitters, each first signal strength value representing one of the plurality of beacons from a corresponding beacon transmitter of the plurality of beacon transmitters a measured signal strength of the one or more beacons; and a control unit configured to receive the signal and determine a signal strength of the first TPMS sensor module based on a first signal strength value for each of the plurality of beacon transmitters. Location.

Description

technical field [0001] The present disclosure relates generally to tire pressure monitoring systems (TPMS), and more particularly, to positioning a TPMS sensor module in a TPMS. Background technique [0002] Tire pressure monitoring systems (TPMS) play an important role in vehicle safety and emission reduction. Much of this market is served by direct tire pressure monitoring systems, where each tire contains a TPMS sensor module. Therefore, a battery-powered sensor module is assembled inside the tire to monitor its tire pressure. The sensor module contains a pressure sensor, microcontroller, radio frequency (RF) transmitter, and coin cell battery. [0003] In principle, a sensor module measures tire pressure and transmits the measurement data to a central unit in the vehicle using a unidirectional link. Since the battery cannot be replaced, the sensor module life depends on the battery life. A major part of the power consumption is generated by RF transmissions. Therefo...

AI Technical Summary

Problems solved by technology

One disadvantage is that the TPMS sensor module has to transmit multiple times during the positioning process

Therefore, it has a negative impact on the charge consumption of the TPMS module, thereby reducing the lifetime of the sensor module

Another disadvantage is that the TPMS ECU must have access to the CAN bus and must be able to run fairly complex algorithms and provide large buffers for relevant data

The final disadvantage is that some ABS systems do not provide these count values, but only the value corresponding to the wheel speed, which cannot be used for this positioning method

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