The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2020
Filed:
Mar. 10, 2017
Bridgestone Corporation, Tokyo, JP;
Takeshi Masago, Tokyo, JP;
BRIDGESTONE CORPORATION, Chuo-ku, Tokyo, JP;
Abstract
In order to provide a method and a device capable of precisely estimating a load acting on a tire with less sensors, a load estimation devicefor estimating the load acting on the tire is provided with: an acceleration sensor; an acceleration waveform detection meansthat detects an acceleration waveform in a tire radial direction on the basis of an output of the acceleration sensor; a differential acceleration waveform computing meansthat differentiates the acceleration waveform to obtain a differential acceleration waveform; a peak position detection meansthat detects a position of a peak on a leading edge side and a position of a peak on a trailing edge side appearing in the differential acceleration waveform; a ground contact time ratio calculation meansthat calculates a ground contact time and a rotation time on the basis of the peak positions and calculates a ground contact time ratio, which is a ratio between the calculated ground contact time and the rotation time; and a load estimation meansthat estimates the load acting on the tire on the basis of the calculated ground contact time ratio and a K-W mapM representing a relationship between the calculated ground contact time ratio stored in a storage meansand the load.