| 摘要 |
PROBLEM TO BE SOLVED: To provide a wear state detection device for a tire capable of relatively correctly detecting the wear state of the tire. SOLUTION: This device is provided with a rotation speed detection means for periodically detecting the rotation speed of the tires of four vehicular wheels, a first calculation means for calculating the vehicular speed and the vehicular acceleration/deceleration from the measurement value of the rotation speed detection means, a second calculation means for calculating slip rates of front and rear wheels, a third calculation means for finding mutual primary regression coefficients and correlation coefficients between the vehicular acceleration/ deceleration and the slip rates, a fourth calculation means for accumulating a predetermined number of the primary regression coefficients when the obtained correlation coefficients are equal to or more than a predetermined value to find the average value of the primary regression coefficients, and a tire wear detection means for detecting the wear state of the tires according to the average value.
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