Tire air pressure monitoring system
First Claim
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1. A tire air pressure monitoring system, comprising:
- a plurality of tire air pressure sending units which are respectively attached to wheels of a first member of a vehicle to send radio wave containing tire air pressure information of the wheels by radio;
at least one antenna for receiving the radio wave; and
a tire air pressure receiving apparatus for acquiring the tire air pressure information from signal which is based on the radio wave received by the antenna, the tire air pressure receiving apparatus being mounted at a second member of the vehicle, wherein the antenna is a directional antenna, which is mounted at the second member and oriented to have a stronger receiving sensitivity with respect to a direction of the first member than other directions.
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Abstract
A tire air pressure monitoring system is provided with at least one trailer-use receiving unit, which is mounted at a rear end of a tractor head to receive radio wave sent by multiple tire air pressure sending units. The tire air pressure sending units are respectively attached to wheels of a trailer. The trailer-use receiving unit, having a directional antenna, is oriented to have a stronger receiving sensitivity with respect to a direction of the trailer than other directions.
26 Citations
14 Claims
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1. A tire air pressure monitoring system, comprising:
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a plurality of tire air pressure sending units which are respectively attached to wheels of a first member of a vehicle to send radio wave containing tire air pressure information of the wheels by radio;
at least one antenna for receiving the radio wave; and
a tire air pressure receiving apparatus for acquiring the tire air pressure information from signal which is based on the radio wave received by the antenna, the tire air pressure receiving apparatus being mounted at a second member of the vehicle, wherein the antenna is a directional antenna, which is mounted at the second member and oriented to have a stronger receiving sensitivity with respect to a direction of the first member than other directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification