Vehicle identification system and method using signal arrival angle measurement
First Claim
1. A communication vehicle identification apparatus comprising:
- first radio communication means mounted on a vehicle;
second radio communication means placed at a gate through which the vehicle passes to perform radio communication with said first radio communication means;
directional finding means for measuring an arrival angle of a radio signal transmitted from said first radio communication means with respect to a reference direction;
vehicle classification means for detecting a shape of the vehicle using image data obtained by photographing the vehicle and outputting vehicle shape data; and
vehicle identification means for, when the vehicle has reached a predetermined position on the gate, determining whether the arrival angle output from said directional finding means falls within an arrival angle range of the radio signal from said first radio communication means, which is calculated using the vehicle shape data from said vehicle classification means, and identifying the vehicle having said first radio communication means using a determination result.
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Accused Products
Abstract
A communication vehicle identification apparatus includes first and second radio communication units, a directional finding unit, a vehicle classification unit, and a vehicle identification unit. The first radio communication unit is mounted on a vehicle. The second radio communication unit is placed at a gate through which the vehicle passes to perform radio communication with the first radio communication unit. The directional finding unit measures an arrival angle of a radio signal transmitted from the first radio communication unit with respect to a reference direction. The vehicle classification unit detects the vehicle shape using image data obtained by photographing the vehicle and outputs vehicle shape data. When the vehicle has reached a predetermined position on the gate, the vehicle identification unit determines whether the arrival angle output from the directional finding unit falls within an arrival angle range of the radio signal from the first radio communication unit, which is calculated using the vehicle shape data from the vehicle classification unit, and identifies the vehicle having the first radio communication unit on the basis of a determination result.
30 Citations
16 Claims
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1. A communication vehicle identification apparatus comprising:
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first radio communication means mounted on a vehicle; second radio communication means placed at a gate through which the vehicle passes to perform radio communication with said first radio communication means; directional finding means for measuring an arrival angle of a radio signal transmitted from said first radio communication means with respect to a reference direction; vehicle classification means for detecting a shape of the vehicle using image data obtained by photographing the vehicle and outputting vehicle shape data; and vehicle identification means for, when the vehicle has reached a predetermined position on the gate, determining whether the arrival angle output from said directional finding means falls within an arrival angle range of the radio signal from said first radio communication means, which is calculated using the vehicle shape data from said vehicle classification means, and identifying the vehicle having said first radio communication means using a determination result. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communication vehicle identification method comprising:
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extracting image data when a vehicle having a first radio communication unit passes through a gate at which a second radio communication unit is placed; measuring an arrival angle of a radio signal from said first radio communication unit with respect to a reference direction; detecting a vehicle shape using the extracted image data when the vehicle has reached a predetermined position; estimating a setting position of said first radio communication unit using the detected vehicle shape; calculating an arrival angle range of the radio signal from said first radio communication unit with respect to the reference direction using the estimated setting position; and when the measured arrival angle falls within the calculated arrival angle range, determining that the vehicle reaching the predetermined position comprises the vehicle having said first radio communication unit. - View Dependent Claims (8, 9, 10)
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11. A communication vehicle identification apparatus comprising:
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a first radio communication device mounted on a vehicle; a second radio communication device placed at a gate through which the vehicle passes to perform radio communication with said first radio communication device; a directional finding unit for measuring an arrival angle of a radio signal transmitted from said first radio communication device with respect to a reference direction; a vehicle classification device for detecting a shape of the vehicle using image data obtained by photographing the vehicle and outputting vehicle shape data; and a vehicle identification device for, when the vehicle has reached a predetermined position on the gate, determining whether the arrival angle output from said directional finding unit falls within an arrival angle range of the radio signal from said first radio communication device, which is calculated using the vehicle shape data from said vehicle classification device, and identifying the vehicle having said first radio communication device using a determination result. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification