Automotive radar system
First Claim
1. An automotive radar system for detecting at least one of a range, a crossrange, an azimuth and a relative velocity relative to a target, the system comprising:
- lane-change behavior state detecting section for detecting whether a radar-loaded vehicle is in a lane-change behavior state; and
detection response speed changing section for changing a target detection response speed of the radar system to a value larger than that in a running state other than the lane-change behavior state when said lane-change behavior state detecting section detects that the radar-loaded vehicle is in the lane-change behavior state.
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Accused Products
Abstract
The invention provides a radar system, which can increase a crossrange detection speed in the lane change state by employing a steering angle sensor, etc. loaded on a vehicle without providing additional hardware. A lane-change determining unit receives a yaw rate response from a steering angle sensor, etc., and determines whether the radar-loaded vehicle is in the steering operation for lane change. If the radar-loaded vehicle is in the lane change state, a gain setting unit shifts a tracker gain to a larger value than that in ordinary running, and calculates a range, a crossrange, a relative velocity, etc. relative to a target from the results of tracker processing executed by a filtering unit. By using the calculated range, crossrange, relative velocity, etc., a control determining unit determines whether there is a collision risk, and whether steering operation to avoid a collision is required. If there is a collision risk, a forward collision warning and a control signal for actuating automatic braking are issued. If automatic steering to avoid a collision is required, an automatic steering control signal is issued. When the lane change state is completed, the radar system is returned to the state employing a tracker gain for the ordinary running.
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Citations
11 Claims
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1. An automotive radar system for detecting at least one of a range, a crossrange, an azimuth and a relative velocity relative to a target, the system comprising:
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lane-change behavior state detecting section for detecting whether a radar-loaded vehicle is in a lane-change behavior state; and
detection response speed changing section for changing a target detection response speed of the radar system to a value larger than that in a running state other than the lane-change behavior state when said lane-change behavior state detecting section detects that the radar-loaded vehicle is in the lane-change behavior state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An automotive radar system for detecting at least one of a range, a crossrange, an azimuth and a relative velocity relative to a target, the system comprising:
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lane-change behavior state detecting section for detecting whether a radar-loaded vehicle is in a lane-change behavior state; and
radar detected value modifying section for modifying at least one of the range, the crossrange, the azimuth and the relative velocity relative to said target by using a longitudinal and/or transverse momentum or a speed of the radar-loaded vehicle when said lane-change behavior state detecting section detects that the radar-loaded vehicle is in the lane-change behavior state.
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10. An automotive radar system for detecting at least one of a range, a crossrange, an azimuth and a relative velocity relative to a target, the system comprising:
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lane-change behavior state detecting section for detecting whether a radar-loaded vehicle is in a lane-change behavior state; and
warning stopping section for issuing a forward collision warning when the crossrange from a center of the radar-loaded vehicle to said target is detected as being less than a predetermined value, and automatically stopping the forward collision warning when the crossrange from the center of the radar-loaded vehicle to said target is detected as being not less than the predetermined value.
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11. An automotive radar system for detecting at least one of a range, a crossrange, an azimuth and a relative velocity relative to a target, the system comprising:
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lane-change behavior state detecting section for detecting whether a radar-loaded vehicle is in a lane-change behavior state; and
brake deceleration canceling section for performing deceleration control with braking when the crossrange from a center of the radar-loaded vehicle to said target is detected as being less than a predetermined value, and automatically stopping the deceleration control with braking when the crossrange from the center of the radar-loaded vehicle to said target is detected as being not less than the predetermined value.
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Specification