Title:
TIRE-STATE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/027595
Kind Code:
A1
Abstract:
Disclosed is a tire-state detection device which can not only acquire good antenna characteristics even if the shape of the rim to which the tire-state detection device is to be fitted changes, but can also be produced at lower costs and be mass produced. The tire-state detection device is provided with: a sensor (410) for detecting a predetermined physical state of a tire; an antenna (450) which has a predetermined resonant frequency; a detection circuit for transmitting information relating to the detection results of the sensor (410) as radio waves from the antenna (450); and a case (100) which houses the sensor (410), antenna (450), and detection circuit, and through which radio waves can pass, wherein said case (100) can be fitted to the rim (3) of a tire. The tire-state detection device is provided with a planar conductor (310) which is fit, in a state electrically insulated from the antenna (450), at a position away from the antenna (450) by a predetermined distance so as to form an interface between the antenna (450) and rim (3) when the case (100) is fit to the rim (3), and is set to a potential equivalent to the reference potential of the detection circuit.
Inventors:
NAKATANI Koji (Hiratsuka Plant, 2-1, Oiwake, Hiratsuka-sh, Kanagawa 47, 〒2540047, JP)
Application Number:
JP2010/058351
Publication Date:
March 10, 2011
Filing Date:
May 18, 2010
Export Citation:
Assignee:
THE YOKOHAMA RUBBER CO., LTD. (36-11, Shimbashi 5-chome Minato-k, Tokyo 85, 〒1058685, JP)
横浜ゴム株式会社 (〒85 東京都港区新橋５丁目３６番１１号 Tokyo, 〒1058685, JP)
横浜ゴム株式会社 (〒85 東京都港区新橋５丁目３６番１１号 Tokyo, 〒1058685, JP)
International Classes:
B60C23/04; G01L17/00
Attorney, Agent or Firm:
YOSHIDA Kiyotaka (Meiwa Bldg, 15-10 Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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