Vehicle radar system

Patent metadata

Field	Value
Publication number	US-11307300-B2
Application number	US-201615779995-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Dec 1, 2015
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

A vehicle radar system (3) including at least one transceiver arrangement (7) arranged to generate, transmit and receive reflected radar signals (4, 5) where the transmitted radar signals (4) have been reflected by an object (6 and 8). The radar system (3) is arranged to provide azimuth angle (θ) and radial velocity (vr) for a plurality of measurement points (9) at such objects (6 and 8). The radar system (3) is arranged to calculate a difference between a minimum radial velocity (Vmin′, Vmin″) and a maximum radial velocity (Vmax′, Vmax″) for the measurement points (9) for a plurality of azimuth angle intervals, and to select those azimuth angle intervals (ΔθA, ΔθB) where the difference exceeds a certain threshold.

First claim

The invention claimed is:

1. A vehicle radar system comprising, at least one transceiver arrangement arranged in a host vehicle and configured to generate and transmit radar signals, and to receive reflected radar signals, where the transmitted radar signals have been reflected by one or more objects, where the radar system is arranged to provide an azimuth angle and a radial velocity for a plurality of measurement points at the objects, the radar system includes a processor configured to calculate a difference between a minimum radial velocity and a maximum radial velocity for the measurement points for a plurality of azimuth angle intervals, and to calculate an estimation of a relative velocity between the host vehicle and the one or more objects using the azimuth angle and the radial velocity for each of the measurement points, except for those of the measurement points corresponding to azimuth angle intervals where the difference between the minimum radial velocity and the maximum radial velocity exceeds a certain threshold.

2. The vehicle radar system according to claim 1 , wherein the radial velocity for each of the plurality of measurement points includes an x-component that runs parallel to a direction of travel of the host vehicle, and a y-component perpendicular to the x-component, and wherein the radial velocity provided by the radar system for each of the plurality of measurement points includes only the x-component thereof.

3. A method for a vehicle radar system, where the method comprises the steps of:
generating and transmitting radar signals by at least one transceiver arrangement in a host vehicle;
receiving, by the at least one transceiver arrangement, reflected radar signals, where the transmitted radar signals have been reflected by one or more objects;
providing to a processor, by the vehicle radar system, azimuth angle and radial velocity for a plurality of measurement points at the objects;
calculating, by the processor, a difference between a minimum radial velocity and a maximum radial velocity for the measurement points for a plurality of azimuth angle intervals; and
calculating, by the processor, an estimation of a relative velocity between the host vehicle and the one or more objects using the azimuth angle and the radial velocity for each of the measurement points, except for those of the measurement points corresponding to azimuth angle intervals where the difference between the minimum radial velocity and the maximum radial velocity exceeds a certain threshold.

4. The method according to claim 3 , wherein the radial velocity for each of the plurality of measurement points includes an x-component that runs parallel to a direction of travel of the host vehicle, and a y-component perpendicular to the x-component, and wherein the radial velocity provided by the radar system for each of the plurality of measurement points includes only the x-component thereof.

Assignees

• Klotzbuecher Dirk
• Schwert Christian
• Veoneer Sweden Ab

Inventors

• Klotzbuecher Dirk
• Schwert Christian

Classifications

• G01S13/42 Primary

  Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46) · CPC title

• G01S13/583

  using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets · CPC title

• G01S2013/9315

  Monitoring blind spots · CPC title

• G01S13/584

  adapted for simultaneous range and velocity measurements · CPC title

• G01S2013/93274

  on the side of the vehicles · CPC title