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:
Nov. 22, 2011
Filed:
Jul. 03, 2008
Yasushi Hanatsuka, Tokyo, JP;
Yasushi Hanatsuka, Tokyo, JP;
Kabushiki Kaisha Bridgestone, Tokyo, JP;
Abstract
A method and apparatus for detecting the state of wear of the tire tread with accuracy and durability are provided. Acceleration of the inner surface of the tire tread is detected by an acceleration sensor installed in an inner liner region of the tire. From a thus detected time-series waveform of acceleration, an acceleration waveform in the leading edge region including a leading peak which occurs when the block engages with the road surface or an acceleration waveform in the trailing edge region including a trailing peak which occurs when the block disengages from the road surface is extracted. A frequency band value Pis calculated which is the magnitude of acceleration in a predetermined frequency region of a frequency spectrum obtained through a frequency analysis of the extracted acceleration waveform. And the degree of tire wear is determined by comparing the frequency band value Pwith a preset threshold K(v).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile