Automated vehicle radar system with auto-alignment for azimuth, elevation, and vehicle speed-scaling-error

Patent metadata

Field	Value
Publication number	US-2018024228-A1
Application number	US-201615216866-A
Country	US
Kind code	A1
Filing date	Jul 22, 2016
Priority date	Jul 22, 2016
Publication date	Jan 25, 2018
Grant date	—

Abstract

In accordance with one embodiment, a radar system with auto-alignment suitable for use in an automated vehicle is provided. The system includes a radar-sensor, a speed-sensor, and a controller. The radar-sensor is used to detect objects present in a field-of-view proximate to a host-vehicle on which the radar-sensor is mounted. The radar-sensor is operable to determine a measured-range-rate (dRm), a measured-azimuth-angle (Am), and a measured-elevation-angle (Em) to each of at least three objects present in the field-of-view. The speed-sensor is used to determine a measured-speed (Sm) of the host-vehicle. The controller is in communication with the radar-sensor and the speed-sensor. The controller is configured to simultaneously determine a speed-scaling-error (Bs) of the measured-speed, an azimuth-misalignment (Ba) of the radar-sensor, and an elevation-misalignment (Be) of the radar-sensor based on the measured-range-rate, the measured-azimuth-angle, and the measured-elevation-angle to each of the at least three objects, while the host-vehicle is moving.

First claim

We claim:

1 . A radar system with auto-alignment suitable for use in an automated vehicle, said system comprising:
a radar-sensor used to detect objects present in a field-of-view proximate to a host-vehicle on which the radar-sensor is mounted, said radar-sensor operable to determine a measured-range-rate (dRm), a measured-azimuth-angle (Am), and a measured-elevation-angle (Em) to each of at least three objects present in the field-of-view; a speed-sensor used to determine a measured-speed (Sm) of the host-vehicle; and a controller in communication with the radar-sensor and the speed-sensor, said controller configured to simultaneously determine a speed-scaling-error (Bs) of the measured-speed, an azimuth-misalignment (Ba) of the radar-sensor, and an elevation-misalignment (Be) of the radar-sensor based on the measured-range-rate, the measured-azimuth-angle, and the measured-elevation-angle to each of the at least three objects, while the host-vehicle is moving.

2 . The system in accordance with claim 1 , wherein, said controller further configured to determine an actual-speed (Sa) based on the measured-speed and the speed-scaling-error, an actual-azimuth-angle (Aa) to the objects based on the azimuth-misalignment and the measured-azimuth-angle, and an actual-elevation-angle (Ea) to the objects based on the elevation-misalignment and the measured-elevation-angle.

3 . The system in accordance with claim 1 , wherein each of the at least three objects is characterized as stationary.

4 . The system in accordance with claim 1 , wherein the system includes a yaw-rate-sensor used to determine a yaw-rate of the host-vehicle, wherein the controller is further configured to determine a side-slip-angle (Ys) of the host-vehicle based on the yaw-rate, and further determine the speed-scaling-error, the azimuth-misalignment, and the elevation-misalignment based on the side-slip-angle.

Assignees

• Delphi Tech Inc

Inventors

• Schiffmann Jan K
• Liu Yu
• Schwartz David A
• Zhu Xumin

Classifications

• G01S2013/932

  using own vehicle data, e.g. ground speed, steering wheel direction · CPC title

• G01S2013/93185

  Controlling the brakes · CPC title

• G01S7/415

  Identification of targets based on measurements of movement associated with the target · CPC title

• G01S2013/93271

  in the front of the vehicles · CPC title

• G01S13/931

  of land vehicles · CPC title