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:
Jul. 09, 2013
Filed:
Jun. 25, 2009
Hiroshi Morinaga, Kodaira, JP;
Hiroshi Morinaga, Kodaira, JP;
Kabushiki Kaisha Bridgestone, Tokyo, JP;
Abstract
The degree of tire wear is estimated with constancy and accuracy even when the road surface becomes rough during a vehicular run. The deformation speeds Vand Vof the tread of the tire are obtained respectively by calculating the levels of peaks Pand Pat contact edges appearing in the differentiated waveform of radial acceleration detected by an acceleration sensorinstalled on the inner surface in the inner liner region of the tire. An average standardized deformation velocity Vis calculated as the average of the absolute values of leading-edge-side standardized deformation speed Vand trailing-edge-side standardized deformation speed V, which are obtained by standardizing the Vand Vusing the rotation time Tof the tire. At the same time, an extra-contact-patch vibration level v of the tread is detected from the radial acceleration having passed through a bandpass filter. And a degree M of tire wear is estimated, using the average standardized deformation speed V, the extra-contact-patch vibration level v, and a mapM.