Wheel Speed Normalization for Impact-Based Tire Damage Detection
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Solution Overview
Problem
Current tire damage detection technologies are not efficient or reliable enough to promptly identify potential damages to tires caused by impacts, which can lead to further damage or safety issues if not addressed promptly.
Innovation Solution
A tire damage detection method that includes an acquisition device connected to a vehicle bus, a processing device with a predefined tire damage model, and a notification system, which computes normalized wheel speeds to detect potential tire damage based on predefined thresholds and time lengths determined through tests with various obstacles and speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acceleration sensors and frequency analysis are used to detect tire damage, then detection capability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the tire damage detection function from complex sensor systems and isolates it to wheel speed data analysis only. By taking out the detection task from multiple sensor types (acceleration, pressure, vibration) and focusing solely on wheel speed measurements, the system achieves reliable detection while minimizing device complexity. The wheel speed data, already available from ABS/ESP systems, is repurposed for damage detection without adding hardware.
Solution Approach 2:
The patent makes the existing wheel speed sensor serve multiple functions: its original function for anti-lock braking and stability control, plus a new function for tire damage detection. By enabling the wheel speed data to perform dual purposes, the system improves detection capability without adding dedicated sensors or increasing device complexity.
2Measurement precision
If normalized wheel speed analysis with predefined models is implemented, then detection precision is improved, but processing complexity increases
Solution Approach 1:
The patent performs preliminary normalization of wheel speed data and pre-establishes damage models based on impact characteristics before actual detection. By pre-processing the wheel speed signals to remove vehicle speed variations and pre-defining what constitutes damage patterns, the system achieves high measurement precision while keeping real-time processing simple. The complex analysis is done offline to create lookup tables and thresholds.
Solution Approach 2:
The patent transforms the raw wheel speed parameter into a normalized parameter that removes the influence of vehicle speed. By changing the parameter from absolute wheel speed to normalized deviation from expected speed, the system achieves precise damage detection across different operating conditions without requiring complex adaptive processing algorithms.
3Speed
If real-time detection is implemented, then response time is improved, but computational load increases
Solution Approach 1:
The patent applies partial action by monitoring only specific characteristics of wheel speed data rather than analyzing the complete signal. Instead of processing all wheel speed information, the system focuses only on detecting deviations that indicate impact events, performing minimal necessary computations to achieve timely detection with low energy consumption.
Solution Approach 2:
The patent uses simple threshold-based detection rules that can be quickly evaluated and discarded, rather than maintaining complex computational models. The detection logic consists of simple comparisons against predefined thresholds that require minimal processing power and energy, enabling real-time operation without heavy computational load.
Data Source
AI summary
A tire damage detection method includes a preliminary stage comprising: performing tests involving test tire impacts against/on different obstacles at different motor vehicle speeds; measuring/acquiring test-related wheel speeds during the performed tests; computing test-related normalized wheel speeds based on the test-related wheel speeds; and determining a predefined tire damage model based on the test-related normalized wheel speeds corresponding to the test tire impacts and of associated test-related average wheel speeds. A tire damage detection stage comprises: acquiring signals indicative of a motor vehicle wheel speed; computing, based on quantities indicative of the wheel speed, a normalized wheel speed indicative of a ratio of the wheel speed to an average wheel speed indicative of motor vehicle speed; and detecting potential damage to a tire of the wheel based on the predefined tire damage model and on the normalized wheel speed.