Tire Internal Failure Detection via Acceleration Deformation Analysis
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Solution Overview
Problem
Existing methods for detecting internal mechanical failures in tires, such as separations, while a vehicle is traveling are not precise due to noise components from road and vehicle conditions, and changes in air pressure and temperature are not significant enough to reliably detect failures.
Innovation Solution
A tire internal mechanical failure detection apparatus and method that acquires acceleration data from sensors on the tire, calculates deformation amounts in the tire's contact area, and compares these values to a reference to determine if a failure has occurred, using evaluation values like Xmax/Ymax or tan−1(Xmax/Ymax) to characterize deformation and detect failures accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air pressure and temperature monitoring is used to detect tire failures, then the detection system is simple, but the detection precision is insufficient because changes are not significant enough
Solution Approach 1:
The patent replaces traditional mechanical/physical monitoring methods (air pressure and temperature sensors) with acceleration sensing technology. Acceleration sensors detect vibrations and dynamic responses of the tire structure, enabling precise detection of internal mechanical failures like separations without relying on insignificant pressure or temperature changes.
Solution Approach 2:
The patent changes the detection parameter from static physical quantities (air pressure, temperature) to dynamic mechanical parameters (acceleration, vibration frequency, vibration amplitude). This parameter transformation allows the system to detect subtle structural changes in the tire that indicate internal failures, significantly improving detection precision.
2Reliability
If vibration and sound measurement is used to detect tire abnormalities, then the detection can identify tire issues, but noise components from road and vehicle conditions reduce detection accuracy
Solution Approach 1:
The patent segments the vibration signal into specific frequency components and time-domain characteristics that are unique to tire internal failures. By analyzing particular vibration patterns and their temporal evolution, the system can distinguish failure-related signals from background noise caused by road conditions and vehicle operation.
Solution Approach 2:
The patent implements a feedback mechanism where the detected acceleration data is continuously analyzed and compared against reference patterns. The system adjusts its detection thresholds and analysis parameters based on ongoing measurements, enabling it to adapt to varying operating conditions and maintain high detection accuracy despite environmental noise.
3Reliability
If indoor durability testing is conducted to evaluate tire durability, then durability index can be obtained, but it cannot reproduce all load states that occur during actual vehicle travel
Solution Approach 1:
The patent enables the tire to self-diagnose its own condition during actual vehicle operation. The acceleration sensor mounted on the tire directly measures the real-time dynamic response and deformation characteristics under actual service conditions, eliminating the need for controlled indoor testing and providing authentic durability assessment data.
Solution Approach 2:
The patent performs preliminary detection of potential failures during normal vehicle operation before catastrophic failure occurs. By continuously monitoring acceleration patterns and analyzing deformation characteristics, the system can identify early signs of internal mechanical failures such as separations, allowing for preventive maintenance before the tire actually fails during travel.
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
Enables high-precision detection of internal mechanical failures during vehicle travel, reducing the risk of tire bursts and accidents by accurately identifying deformations caused by failures like separations, independent of varying road and vehicle conditions.
Implementation Method 1
acquire acceleration information on a tire... calculate, from the acceleration information on the tire, deformation amount in a contact-portion of the tire by using a deriving means
Data Source
AI summary
An apparatus and method derives a deformation amount of a contact-portion of the tire based on the tire information, the contact-portion being in contact with the ground, and calculates an evaluation value based on the derived deformation amount, and comparing the calculated evaluation value with a reference value to determine whether or not the internal mechanical failure has occurred in the tire.