Tyre Endurance Detection via Acoustic Monitoring
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Solution Overview
Problem
Current durability tests for tires often detect shape anomalies too late, leading to safety risks and equipment damage, as well as difficulties in analyzing the root cause of failure, due to the high-speed nature of the tests and late-stage detection of tire failure.
Innovation Solution
Analyzing the sound generated by the tire during the test using high-frequency sound detection with a high sampling frequency, preferably from a far-field microphone, to identify early signs of tire failure through changes in sound level and spectral analysis, allowing for earlier intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If shape analysis probes are used to detect tyre anomalies during endurance testing, then the tyre can be monitored for shape changes, but the detection occurs too late (often at very late stage or when tyre bursts)
Solution Approach 1:
The patent replaces mechanical/optical shape detection probes with acoustic sensing. Microphones detect sound waves generated by tyre failures, enabling early detection before shape anomalies become visible. This substitution allows detection at an earlier stage (before tyre bursts) while maintaining measurement capability.
Solution Approach 2:
The patent introduces sound waves as an intermediary indicator of tyre failure. Instead of directly measuring tyre shape changes, the system detects acoustic emissions that precede visible anomalies. This intermediary approach enables earlier warning of tyre failure conditions.
2Speed
If high-speed endurance testing is conducted (e.g. 150-300 km/h peripheral speed), then the tyre can be tested under realistic driving conditions, but safety risks increase and root cause analysis becomes difficult when failure occurs
Solution Approach 1:
The patent implements acoustic feedback monitoring during high-speed testing. Microphones continuously detect sound patterns that indicate developing tyre failures. This feedback system allows operators to stop tests before catastrophic failures occur, maintaining safety while enabling high-speed testing conditions.
Solution Approach 2:
The patent enables preliminary detection of tyre failure through acoustic signals before actual failure occurs. By detecting sound patterns indicating tyre degradation, the system allows preventive intervention at high speeds without risking safety or equipment damage.
3Measurement precision
If conventional probes are used for detecting tyre shape anomalies, then the testing equipment can monitor tyre condition, but the root cause of failure cannot be analyzed when failure occurs at very late stage
Solution Approach 1:
The patent uses acoustic emissions as an intermediary that preserves information about tyre failure mechanisms. Different failure modes produce distinct sound patterns, allowing root cause analysis even when failures occur during high-speed testing. This intermediary approach captures diagnostic information that shape probes miss.
Solution Approach 2:
The patent replaces mechanical shape measurement with acoustic sensing that captures dynamic failure processes. The acoustic signals provide information about the mechanisms causing failure (e.g., tread separation, belt detachment) that are not visible through shape monitoring alone.
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 the reliable and early detection of tire failure, preventing accidents and equipment damage by identifying changes in sound patterns indicative of endurance limits being reached, thereby allowing for timely intervention in the testing process.
Implementation Method 1
detecting sound generated by the tyre making a rolling contact with the movable surface
Implementation Method 2
transducing the sound generated by the tyre to a signal using a microphone arrangement
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3a~3c
AI summary
A method for evaluating endurance of a tyre, comprising rotating the tyre with respect to a movable surface to generate sound, transducing the sound to a signal using a microphone arrangement and a sampling frequency of at least 20 kHz, and determining from the signal that an endurance of the tyre has been exceeded. A device for performing the method. A computer program for generating a second signal indicative of an endurance of a tyre having been exceeded based on a signal transduced from the sound. A method for teaching a data-driven model for the purpose of determining from a signal an endurance of a tyre.