SYSTEM FOR MONITORING TIRE AIR PRESSURE

WIPO Patent Application WO/2010/147004

A1

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).

JPS605904	[Title of the device] Steering power unusual alarm equipment
WO/2008/113384	METHOD, SYSTEM AND COMPUTER PROGRAM FOR ESTIMATION OF THE PRESSURE
JP3314280	TIRE PRESSURE/CAR SPEED MEASURING APPARATUS

NORIMATSU TAKAYUKI (JP)
KAMETAKA KOJI (JP)

PCT/JP2010/059506

December 23, 2010

June 04, 2010

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NTN TOYO BEARING CO LTD (JP)
NORIMATSU TAKAYUKI (JP)
KAMETAKA KOJI (JP)

B60C23/06; B60B35/18; G01L17/00; G01P3/487; F16C41/00

JP2004133911A	2004-04-30
JP2003294560A	2003-10-15
JP2005084998A	2005-03-31
JP2007091144A	2007-04-12
JP2000019188A	2000-01-21

SUGIMOTO, Shuji et al. (JP)
Shuji Sugimoto (JP)

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