Tire air pressure monitoring system
First Claim
Patent Images
1. A tire air pressure monitoring system, comprising:
- a plurality of tire air pressure sending units which are respectively attached to wheels of a trailer of a vehicle to send a radio wave containing tire air pressure information of the wheels by radio;
a plurality of antennas for receiving the radio wave; and
a tire air pressure receiving apparatus for acquiring the tire air pressure information from a signal which is based on the radio wave received by the antennas, the tire air pressure receiving apparatus being mounted at a tractor head of the vehicle, wherein;
each of the antennas is a directional antenna, which is mounted at the tractor head and oriented to have a receiving sensitivity in a direction toward the trailer which is stronger than that in other directions; and
the plurality of antennas are respectively mounted at different positions in a left-right direction of the vehicle so that an overlap portion where receiving fields of the antennas overlap each other has a spatial diversity effect, and the plurality of antennas are arranged in such a manner that the receiving fields thereof cover all of the wheels of the trailer.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
19 Claims
-
1. A tire air pressure monitoring system, comprising:
-
a plurality of tire air pressure sending units which are respectively attached to wheels of a trailer of a vehicle to send a radio wave containing tire air pressure information of the wheels by radio; a plurality of antennas for receiving the radio wave; and a tire air pressure receiving apparatus for acquiring the tire air pressure information from a signal which is based on the radio wave received by the antennas, the tire air pressure receiving apparatus being mounted at a tractor head of the vehicle, wherein; each of the antennas is a directional antenna, which is mounted at the tractor head and oriented to have a receiving sensitivity in a direction toward the trailer which is stronger than that in other directions; and the plurality of antennas are respectively mounted at different positions in a left-right direction of the vehicle so that an overlap portion where receiving fields of the antennas overlap each other has a spatial diversity effect, and the plurality of antennas are arranged in such a manner that the receiving fields thereof cover all of the wheels of the trailer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A tire air pressure monitoring system, comprising:
-
a plurality of tire air pressure sending units which are respectively attached to wheels of a trailer of a vehicle to send a radio wave containing tire air pressure information of the wheels by radio; a plurality of antennas for receiving the radio wave; and a tire air pressure receiving apparatus for acquiring the tire pressure information from a signal which is based on the radio wave received by the antennas, the tire air pressure receiving apparatus being mounted at a tractor head of the vehicle, wherein; each of the antennas is a directional antenna, which is mounted at the tractor head and oriented to have a receiving sensitivity in a direction toward the trailer which is stronger than that in other directions; and the plurality of antennas are respectively mounted at different positions in a left-right direction of the vehicle, and arranged in such a manner that an overlap portion where receiving fields of the plurality of antennas overlap each other has a central line substantially positioned at a middle between the wheels of a trailer right side and the wheels of a trailer left side of the trailer. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A tire air pressure monitoring system, comprising:
-
a plurality of tire air pressure sending units which are respectively attached to wheels of a trailer of a vehicle to send a radio wave containing tire air pressure information of the wheels by radio; a plurality of antennas for receiving the radio wave; and a tire air pressure receiving apparatus for acquiring the tire air pressure information from a signal which is based on the radio wave received by the antennas, the tire air pressure receiving apparatus being mounted at a tractor head of the vehicle, wherein; each of the antennas is a directional antenna, which is mounted at the tractor head and oriented to have a receiving sensitivity in a direction toward the trailer which is stronger than that in other directions; and the plurality of antennas are respectively mounted at different positions in a left-right direction of the vehicle, and arranged in such a manner that an overlap portion where receiving fields of the plurality of antennas overlap each other is substantially symmetrical with respect to a trailer-width-direction central line of the trailer.
-
Specification