Reading apparatus and reading method that reads transmission information from first tag and second tag arranged in road
First Claim
1. A reading apparatus, which reads transmission information from a first tag and a second tag arranged in a road via wireless communication and is loaded on a vehicle, comprising:
- an antenna configured to output a request signal for requesting transmission of predetermined information to the first tag and the second tag; and
a controller configured to control output of the request signal, whereinthe first tag is arranged at a first reference point as reference, and the second tag is arranged at a second reference point as reference away from an advancing direction of the vehicle with respect to the first reference point; and
the controller stops the output of the request signal when acquiring information of a reference distance serving as an interval between the first reference point and the second reference point, and meanwhile, calculates a required time for which the vehicle moves to the second reference point on the basis of the reference distance and a travelling speed of the vehicle, and starts transmission of the request signal when the required time elapses.
1 Assignment
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Accused Products
Abstract
A reading apparatus reads transmission information from a first tag and a second tag arranged in a road via wireless communication, and is loaded on a vehicle. The reading apparatus comprises an antenna and a controller. The antenna outputs a request signal for requesting transmission of predetermined information to the first tag and the second tag. The first tag is arranged at a first reference point as reference. The second tag is arranged at a second reference point as reference away from an advancing direction of the vehicle with respect to the first reference point. The controller stops output of the request signal when acquiring a reference distance between the first reference point and the second reference point from the first tag, calculates a required time for which the vehicle moves to the second reference point on the basis of the reference distance and a travelling speed of the vehicle.
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Citations
6 Claims
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1. A reading apparatus, which reads transmission information from a first tag and a second tag arranged in a road via wireless communication and is loaded on a vehicle, comprising:
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an antenna configured to output a request signal for requesting transmission of predetermined information to the first tag and the second tag; and a controller configured to control output of the request signal, wherein the first tag is arranged at a first reference point as reference, and the second tag is arranged at a second reference point as reference away from an advancing direction of the vehicle with respect to the first reference point; and the controller stops the output of the request signal when acquiring information of a reference distance serving as an interval between the first reference point and the second reference point, and meanwhile, calculates a required time for which the vehicle moves to the second reference point on the basis of the reference distance and a travelling speed of the vehicle, and starts transmission of the request signal when the required time elapses. - View Dependent Claims (2, 3, 4, 5)
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6. A reading method for reading transmission information from a first tag and a second tag arranged in a road via wireless communication, wherein the first tag is arranged at a first reference point as reference, and the second tag is arranged at a second reference point as reference away from an advancing direction of a vehicle with respect to the first reference point, including:
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stopping transmission of a request signal for requesting transmission of predetermined information to the first tag and the second tag when acquiring information of a reference distance serving as an interval between the first reference point and the second reference point from the first tag; calculating a required time for which the vehicle moves to the second reference point on the basis of the reference distance and a travelling speed of the vehicle; and starting transmission of the request signal when the required time elapses.
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Specification