Radar apparatus for accurately detecting a path of a target vehicle which is in a lane of a vehicle
First Claim
1. A radar apparatus of a vehicle comprising:
- radar means for radiating a radar beam to a target in a forward direction of the vehicle and for receiving a reflection beam from the target to detect a target vehicle based on the received reflection beam;
scanning control means for moving a beam radiation axis of the radar means across the target from left to right or vice versa in response to a scanning angle signal; and
lane discriminating means, having an input coupled to said radar means and an output coupled to said scanning control means, for detecting whether a path of the target vehicle is in a lane of the vehicle based on the received reflection beam, said lane discriminating means including;
first means for supplying a scanning angle signal to said scanning control means for each of a plurality of scanning angles, so that the beam radiation axis is moved for each of the plurality of scanning angles;
second means for detecting a relative distance, a relative speed and a reflection beam level based on the received reflection beam after the beam radiation axis is moved for each of the plurality of scanning angles;
third means for detecting whether one of a plurality of lane discriminating conditions is met by the relative distances, the relative speeds and the reflection beam levels for all the plurality of scanning angles.
1 Assignment
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Accused Products
Abstract
A radar apparatus includes a radar unit which radiates a radar beam to a target in a forward direction of a vehicle and receives a reflection beam from the target to detect a target vehicle based on the received reflection beam. A scanning control unit moves a beam radiation axis of the radar unit across the target from left to right or vice versa in response to a scanning angle signal. A lane discriminating unit, having an input coupled to the radar unit and an output coupled to the scanning control unit, detects whether a path of the target vehicle is in a lane of the vehicle based on the received reflection beam. The lane discriminating unit supplies a scanning angle signal to the scanning control unit for each of a plurality of scanning angles, so that the beam radiation axis is moved for each of the plurality of scanning angles, detects a relative distance, a relative speed and a reflection beam level based on the received reflection beam after the beam radiation axis is moved, and detects whether one of a plurality of lane discriminating conditions is met by the relative distances, the relative speeds and the reflection beam levels for all the plurality of scanning angles.
25 Citations
11 Claims
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1. A radar apparatus of a vehicle comprising:
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radar means for radiating a radar beam to a target in a forward direction of the vehicle and for receiving a reflection beam from the target to detect a target vehicle based on the received reflection beam; scanning control means for moving a beam radiation axis of the radar means across the target from left to right or vice versa in response to a scanning angle signal; and lane discriminating means, having an input coupled to said radar means and an output coupled to said scanning control means, for detecting whether a path of the target vehicle is in a lane of the vehicle based on the received reflection beam, said lane discriminating means including; first means for supplying a scanning angle signal to said scanning control means for each of a plurality of scanning angles, so that the beam radiation axis is moved for each of the plurality of scanning angles; second means for detecting a relative distance, a relative speed and a reflection beam level based on the received reflection beam after the beam radiation axis is moved for each of the plurality of scanning angles; third means for detecting whether one of a plurality of lane discriminating conditions is met by the relative distances, the relative speeds and the reflection beam levels for all the plurality of scanning angles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification