In-Tire Acceleration Peak Analysis for Real-Time Tread Wear

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Solution Overview

Problem

Existing tire wear measurement systems are inefficient and inconsistent, as they require extensive information and do not accurately account for actual vehicle operating conditions, leading to unreliable tire wear estimation.

Innovation Solution

A tire wear measuring apparatus that uses an acceleration sensor to measure acceleration signals inside a tire, analyzes the peak value of acceleration to estimate tread wear, and normalizes it to exclude the influence of speed, load, and pressure, thereby calculating the tread wear rate and determining the replacement time of the tire.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If tire wear is measured using vehicle load and distance traveled, then wear rate can be estimated, but the measurement is inefficient and requires extensive information

Engineering Contradiction:

Improvetire wear measurement accuracyVSAvoidinformation requirements

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts only the essential information needed for tire wear measurement by using acceleration sensors mounted on the tire to directly measure vibration characteristics. This eliminates the need for extensive vehicle load, distance traveled, and other operational data, resolving the contradiction between measurement accuracy and information requirements complexity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces indirect mechanical estimation methods (based on load and distance) with direct vibration-based measurement using acceleration sensors. This substitution enables accurate tire wear measurement while significantly reducing the complexity of information collection and processing

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If tire wear is measured using sensing methods, then wear rate can be detected, but the results are inconsistent and do not reflect actual operating conditions

Engineering Contradiction:

Improvewear rate measurement consistencyVSAvoidaccuracy under actual conditions

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent employs dynamic vibration measurement using acceleration sensors that capture real-time tire behavior during actual vehicle operation. By analyzing vibration characteristics under varying operating conditions, the system achieves both consistent measurement results and accurate reflection of actual tire wear, resolving the contradiction between measurement consistency and reliability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent utilizes mechanical vibration signals from the tire, measured by acceleration sensors, as the basis for wear detection. The vibration characteristics directly reflect the tire's physical state and wear condition, providing both consistent and reliable measurements that accurately represent actual operating conditions

Inventive Principle:

Principle #18Mechanical vibration

3Productivity

If acceleration signals are measured inside the tire, then real-time wear measurement is enabled, but the measurement is affected by speed, load, and pressure variations

Engineering Contradiction:

Improvereal-time measurement capabilityVSAvoidaccuracy affected by operating conditions

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies parameter changes by normalizing the acceleration signals to compensate for variations in speed, load, and pressure. By transforming the raw vibration data into normalized wear indicators, the system maintains real-time measurement capability while eliminating the influence of operating condition variations, thus resolving the contradiction between productivity and measurement precision

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution enables real-time, accurate measurement of tire wear, providing reliable information for timely tire replacement and automatic service notifications, improving vehicle safety by accurately assessing tire condition.

Implementation Method 1

a signal receiver configured to measure acceleration inside a tire installed to a vehicle for each point inside the tire

Methodology Applied

Scientific EffectAcceleration: Accelerometer

Data Source

PatentUS11807046B2Tire wear measurement device using acceleration peak value of tire and tire wear measurement method using same

Publication Date: 2023.11.07 HANKOOK TIRE & TECHNOLOGY CO LTD

AI summary

Provided is a technique for measuring a wear rate of a tire tread using tendency of a peak value of acceleration of the tire. According to an embodiment of the present disclosure, a tire wear measuring apparatus includes: a signal receiver configured to measure acceleration inside the tire installed to a the vehicle for each point inside the tire; a signal analyzer configured to receive signal information from the signal receiver and estimate a tread wear rate of the tire using a peak value of acceleration in longitudinal direction perpendicular to an axial direction of the tire from among acceleration signals inside the tire; a transmitter configured to receive analysis information, which is information on the tread wear rate of the tire, from the signal analyzer and transmit the analysis information; and a control module configured to receive the analysis information from the transmitter and generate a control signal for the vehicle to which the tire is installed. A physical change thereof is verified using a Flexible Ring tire model which is a mathematical model.