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Title:
SYSTEM FOR MONITORING TIRE AIR PRESSURE
Document Type and Number:
WIPO Patent Application WO/2010/147004
Kind Code:
A1
Abstract:
A system capable of monitoring the air pressure within the tire without providing a pressure sensor, capable of transmitting a detection signal through a wire, having no influence of noise, and highly reliable because of stable signal transmission. Bearings adapted for use in wheels and provided with rotation detection devices (1) for detecting the rotational speed of the rotating rings of the bearings are used as the bearings (2) for supporting the wheels (21) of a vehicle. The system is provided with an air pressure estimation means (24) for estimating the air pressure within the tires by comparing with each other rotational speed signals outputted from the rotation detection devices (1) of the bearings (2). The rotation detection devices (1) are provided with multiplication means (4) for multiplying output pulses outputted from sensors (3).

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Inventors:
NORIMATSU, Takayuki (1578 Higashikaizuka, Iwata-sh, Shizuoka 37, 〒4380037, JP)
乗松孝幸 (〒37 静岡県磐田市東貝塚１５７８番地　ＮＴＮ株式会社内 Shizuoka, 〒4380037, JP)
Application Number:
JP2010/059506
Publication Date:
December 23, 2010
Filing Date:
June 04, 2010
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
ＮＴＮ株式会社 (〒03 大阪府大阪市西区京町堀１丁目３番１７号 Osaka, 〒5500003, JP)
NORIMATSU, Takayuki (1578 Higashikaizuka, Iwata-sh, Shizuoka 37, 〒4380037, JP)
International Classes:
B60C23/06; B60B35/18; G01L17/00; G01P3/487; F16C41/00
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (Higobashi Nittai Bldg, 10-2 Edobori 1-chome, Nishi-ku, Osaka-sh, Osaka 02, 〒5500002, JP)
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