Extraction of tire characteristics combining direct TPMS and tire resonance analysis

A tire and direct technology, applied in the direction of automobile tire testing, vehicle testing, special data processing applications, etc., can solve problems such as loss of pressure, low precision ABS sensing data signal, resolution impact, etc.

Active Publication Date: 2015-04-15
INFINEON TECH AG
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  • Abstract
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  • Claims
  • Application Information

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

Method used

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  • Extraction of tire characteristics combining direct TPMS and tire resonance analysis
  • Extraction of tire characteristics combining direct TPMS and tire resonance analysis
  • Extraction of tire characteristics combining direct TPMS and tire resonance analysis

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Embodiment Construction

[0019] Embodiments relate to tire characterization systems and methods for combining tire resonance analysis in direct tire pressure monitoring systems (TPMS) and indirect tire pressure monitoring systems (TPMS) for extracting tire features for characterizing other tires parameter. In an embodiment, utilizing an anti-lock braking system ( TPMS and methods of signals sensed by ABS) can be combined with direct tire pressure sensor measurements from direct TPMS systems. Because the direct TPMS system delivers precise values ​​of tire characteristics such as tire pressure, one of the unknown parameters affecting the resonance effect can be removed. As a result, the detected resonances can be used to characterize additional tire parameters that would not be available without knowing the exact values ​​of the tire characteristics delivered by the direct TPMS system. In an embodiment, adding one or more direct measurements from a direct TPMS system to the system of equations descri...

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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...

Claims

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Application Information

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IPC IPC(8): G01M17/02G06F17/00
CPCG01M17/02G01M17/025
Inventor D.哈默施密特
Owner INFINEON TECH AG
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