Intersection warning system
First Claim
1. An intersection warning system comprising:
- a vehicle-side system provided in a vehicle; and
a road-side system, wherein said vehicle-side system comprises;
a transmitting unit emitting a radar signal to a forward area of said vehicle;
a receiving unit receiving a signal from the forward area of said vehicle;
a reflected signal detecting unit determining whether the signal received by said receiving unit is a reflected signal of the radar signal emitted by said transmitting unit; and
warning means for issuing a warning when said reflected signal detecting unit determines that the received signal is the reflected signal of the radar signal, and wherein said road-side system comprises;
a signal return unit, provided for each of lanes intersecting each other at an intersection, receiving the radar signal from the vehicle approaching the intersection on each of the lanes and returning a virtual reflected signal toward the vehicle;
a vehicle watching unit watching the lanes intersecting each other at the intersection and detecting a vehicle approaching the intersection; and
control means for activating said signal returning unit provided for at least one of the lanes when said vehicle watching unit detects vehicles approaching the intersection on the lanes intersecting each other.
1 Assignment
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Accused Products
Abstract
An intersection warning system includes a vehicle-side system provided in a vehicle, and a road-side system. The vehicle-side system includes a transmitting unit emitting a radar signal to a forward area of the vehicle, a receiving unit receiving a signal from the forward area of the vehicle, a reflected signal detecting unit determining whether the signal received by the receiving unit is a reflected signal of the radar signal emitted by the transmitting unit, and warning means for issuing a warning when the reflected signal detecting unit determines that the received signal is the reflected signal of the radar signal. The road-side system includes a signal return unit, provided for each of lanes intersecting each other at an intersection, receiving the radar signal from the vehicle approaching the intersection on each of the lanes and returning a virtual reflected signal toward the vehicle, a vehicle watching unit watching the lanes intersecting each other at the intersection and detecting a vehicle approaching the intersection, and a control means for activating the signal returning unit provided for at least one of the lanes when the vehicle watching unit detects vehicles approaching the intersection on the lanes intersecting each other.
55 Citations
8 Claims
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1. An intersection warning system comprising:
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a vehicle-side system provided in a vehicle; and a road-side system, wherein said vehicle-side system comprises; a transmitting unit emitting a radar signal to a forward area of said vehicle; a receiving unit receiving a signal from the forward area of said vehicle; a reflected signal detecting unit determining whether the signal received by said receiving unit is a reflected signal of the radar signal emitted by said transmitting unit; and warning means for issuing a warning when said reflected signal detecting unit determines that the received signal is the reflected signal of the radar signal, and wherein said road-side system comprises; a signal return unit, provided for each of lanes intersecting each other at an intersection, receiving the radar signal from the vehicle approaching the intersection on each of the lanes and returning a virtual reflected signal toward the vehicle; a vehicle watching unit watching the lanes intersecting each other at the intersection and detecting a vehicle approaching the intersection; and control means for activating said signal returning unit provided for at least one of the lanes when said vehicle watching unit detects vehicles approaching the intersection on the lanes intersecting each other. - View Dependent Claims (2, 3, 4)
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5. An intersection warning system comprising:
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a vehicle-side system provided in a vehicle; and a road-side system, wherein said vehicle-side system comprises; a transmitting unit emitting a radar signal to a forward area of said vehicle; a receiving unit receiving a signal from the forward area of said vehicle; a reflected signal detecting unit determining whether the signal received by said receiving unit is a reflected signal of the radar signal emitted by said transmitting unit; and warning means for issuing a warning when said reflected signal detecting unit determines that the received signal is the reflected signal of the radar signal, and wherein said road-side system comprises; a signal return unit, provided for each of lanes intersecting each other in an intersection, receiving the radar signal from the vehicle approaching the intersection on each of the lanes and returning a virtual reflected signal toward the vehicle; a vehicle watching unit watching the lanes intersecting each other at the intersection and detecting a running state a vehicle approaching the intersection on each of the lanes; signal state detecting means for detecting a state of a traffic-signal provided for each of the lanes at the intersection, the traffic-signal indicating at least a first state for permitting vehicles to pass through the intersection and a second state for prohibiting vehicles from passing through the intersection; warning determination means for determining, based on the running state of the vehicle detected by said vehicle watching means and the state of the traffic-signal detected by said signal state detecting means, whether a warning should be issued; and control means for activating said signal return unit when said warning determination means determines that the warning should be issued. - View Dependent Claims (6, 7)
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8. A vehicle-side intersection warning system comprising:
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a transmitting unit emitting a radar signal to a forward area of said vehicle; a receiving unit receiving a signal from the forward area of said vehicle; a reflected signal detecting means determining whether the signal received by said receiving unit is a reflected signal of the radar signal emitted by said transmitting unit; a merger information determination unit determining whether the received signal includes predetermined information; and warning means for issuing a warning when said reflected signal detecting means determines that the received signal is the reflected signal of the radar signal and said merger information determination unit determines that the received signal includes the predetermined information.
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Specification