Method for measuring the rolling radius of a tire using an acceleration sensor and a gyroscope

Abstract

This invention provides a method for measuring tire rolling radius using an accelerometer and a gyroscope, comprising: installing a triaxial accelerometer and a gyroscope on the inner wall of the tire crown to acquire radial acceleration and angular velocity signals; performing multi-level preprocessing on the radial acceleration signals, including bandpass filtering, wavelet denoising, sliding window variance analysis, and dynamic threshold segmentation to identify grounded and non-grounded segments; extracting the steady-state value of radial acceleration in the non-grounded segment using adaptive weighted averaging and performing dynamic compensation in conjunction with gyroscope data; calculating the rolling radius according to the circular motion formula; performing Kalman filtering and statistical analysis on the rolling radius for multiple consecutive cycles, and issuing a warning when the value exceeds a threshold. This invention achieves high-precision, high-frequency real-time monitoring of tire rolling radius through multi-level signal processing and data fusion algorithms, without relying on external signals, and is applicable to various vehicle models and road conditions, thus improving vehicle driving safety.

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