Extraction of tire characteristics combining direct TPMS and tire resonance analysis

Abstract

Embodiments relate to tire characterization systems and methods for combining direct tire pressure monitoring systems (TPMS) and tire resonance analysis in indirect tire pressure monitoring systems (TPMS) for the extraction of tire characteristics to characterize other tire parameters. In embodiments, iTPMS and methods that utilize anti-lock braking system (ABS) sensed signals coupled to an electronic control unit (ECU) that may comprise circuitry and / or controllers to process the sensed signals using a resonance frequency analysis (RFA) technique can be combined with direct tire pressure sensor measurements from direct TPMS systems. Because direct TPMS systems deliver a precise value of a tire characteristic (for example, tire pressure), one of the unknown parameters that influence the resonance effects can be removed. As a results, the detected resonance can be used to characterize another tire parameter that would not be accessible without knowledge of the precise value of the tire characteristic delivered by the direct TPMS system.

Description

technical field [0001] Embodiments relate generally to direct tire pressure monitoring and indirect tire pressure monitoring, and more particularly to combining direct tire pressure monitoring with tire resonance analysis for extracting tire features to characterize other tire parameters. Background technique [0002] There are two general methods to monitor the pressure in vehicle tires: direct and indirect. Direct tire pressure monitoring systems typically include a wheel module with one or more sensors and electronics mounted in or to the tire to directly measure the pressure of the tire and wirelessly transmit the measurement data to the vehicle. [0003] Indirect TPMS generally utilize information from other vehicle sensors and / or systems to indirectly estimate tire pressure without direct TPMS sensors or electronics positioned in the tire. Indirect TPMS is attractive because it can be more cost-effective than direct TPMS. A conventional indirect TPMS uses wheel speed...

AI Technical Summary

Problems solved by technology

A drawback of some of these indirect systems is that the system cannot detect if all wheels have lost pressure over time because the values ​​are compared

While RFM analysis may represent an improvement over conventional indirect TPMS, the accuracy of the results may be compromised by the low resolution of the ABS sensing data signal and other factors that may affect resonant frequencies just beyond tire pressure in individual tires

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