Device for locating a moving body having a response unit
First Claim
1. A device for locating a moving body having a response unit, said device comprising:
- an interrogation unit having a predetermined communication zone having a width which is perpendicular to a travel path of a moving body which allows a plurality of moving bodies to simultaneously exist in the communication zone, said interrogation unit transmitting a radio signal to said communication zone where said moving body having a response unit for receiving said radio signal passes;
a receiving device having a plurality of receiving areas at least in a direction perpendicular to the travel path of said moving body so as to cover said communication zone, said receiving device being capable of receiving distinguishably each signal from said plurality of receiving areas, each of said receiving areas having a size which allows only one moving body therein; and
a processor for determining the position of said moving body in said communication zone based on a reception result of said receiving device.
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Accused Products
Abstract
A device for locating a moving body includes:
an interrogation unit (10) for communicating with a response unit (50) mounted on a vehicle (51) present in a lane of a communication zone "a"; receiving antennas (21, 22) having receiving areas "21b, 22b" divided in the width direction of the lane; and a processor (40) for determining the position of the vehicle in the communication zone based on a reception result from the receiving antennas. The device may also include a detecting device such as an imaging device (30) having an imaging area "c" of a size equal to the lane. This makes it possible to recognize an unauthorized vehicle (52) not having a response unit and thus passing through the imaging area "c" without a radio signal to be received by the receiving antennas (21, 22).
41 Citations
20 Claims
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1. A device for locating a moving body having a response unit, said device comprising:
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an interrogation unit having a predetermined communication zone having a width which is perpendicular to a travel path of a moving body which allows a plurality of moving bodies to simultaneously exist in the communication zone, said interrogation unit transmitting a radio signal to said communication zone where said moving body having a response unit for receiving said radio signal passes; a receiving device having a plurality of receiving areas at least in a direction perpendicular to the travel path of said moving body so as to cover said communication zone, said receiving device being capable of receiving distinguishably each signal from said plurality of receiving areas, each of said receiving areas having a size which allows only one moving body therein; and a processor for determining the position of said moving body in said communication zone based on a reception result of said receiving device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16)
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10. A system having a device installed on a road for determining whether a vehicle traveling on said road is carrying a predetermined response unit, said device comprising:
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an interrogation unit having a predetermined communication zone having a width which is perpendicular to a travel path of the vehicle which allows a plurality of vehicles to simultaneously exist in the communication zone, said interrogation unit transmitting a radio signal to said communication zone where a response unit for receiving said signal passes; a receiving device having a plurality of areas at least in a direction perpendicular to said road so as to cover said communicating zone, said device being capable of receiving distinguishably each signal from said plurality of receiving areas, each of said plurality of areas having a size which is capable of having only one vehicle therein; and a processor for determining the position of said vehicle carrying the response unit based on the reception result of said receiving device. - View Dependent Claims (11, 12, 17, 18, 19, 20)
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Specification