TIRE PRESSURE MONITORING DEVICE
First Claim
1. A tire pressure monitoring device comprising:
- pneumatic pressure monitoring units that are disposed at respective tires of a vehicle, that measure pneumatic pressures of the tires, and that transmit results of the measurements of the pneumatic pressures from antennas using radio signals; and
a communication unit that receives the radio signals from the pneumatic pressure monitoring units;
wherein the communication unit is disposed in the vehicle, and is provided with a beam controller arranged to selectively direct reception beams in directions of the respective tires.
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Accused Products
Abstract
Pneumatic pressure monitoring units that measure pneumatic pressures of respective tires and that transmit results of the measurements of the pneumatic pressures from respective antennas by the use of radio signals are provided at the tires, respectively. A communication unit including a beam controller arranged to selectively direct reception beams towards the respective tires is provided at substantially the center near the bottom surface of a vehicle. The antennas of the respective pneumatic pressure monitoring units are constructed so that directivity patterns of transmission beams are directed towards the inside in axle directions of the tires.
25 Citations
12 Claims
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1. A tire pressure monitoring device comprising:
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pneumatic pressure monitoring units that are disposed at respective tires of a vehicle, that measure pneumatic pressures of the tires, and that transmit results of the measurements of the pneumatic pressures from antennas using radio signals; and
a communication unit that receives the radio signals from the pneumatic pressure monitoring units;
whereinthe communication unit is disposed in the vehicle, and is provided with a beam controller arranged to selectively direct reception beams in directions of the respective tires. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification