Evaluation method, particularly for a driver assistance system of a motor vehicle, for object detection using a radar sensor

• US 20090140913A1
• Filed: 11/14/2008
• Published: 06/04/2009
• Est. Priority Date: 12/04/2007
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hildebrandt, Juergen, Hauk, Joachim
• Granted Patent: US 8,035,548 B2
• Time in Patent Office: Days
• US Class Current: 342/70
• CPC Class Codes: G01S 13/422 sequential lobing, e.g. conical scan
• CPC Class Codes: G01S 13/4445 amplitude comparisons monopulse, i.e. comparing the echo signals received by an antenna arrangement with overlapping squinted beams
• CPC Class Codes: G01S 13/726 Multiple target tracking
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/93185 Controlling the brakes
• CPC Class Codes: G01S 2013/9321 Velocity regulation, e.g. cruise control
• CPC Class Codes: G01S 2013/9325 for inter-vehicle distance regulation, e.g. navigating in platoons

Abstract

An evaluation method, e.g., for a driver assistance system of a motor vehicle, is provided for object detection using a radar sensor, which synchronously emits at least two separate radar beam lobes, that cover an angular range to be scanned, and which receives respective target responses as measured values. At least two target responses of the at least two separate radar beam lobes of the radar sensor are arithmetically superposed in such a way that a synthetic radar beam lobe is created having at least one predetermined zero value in the scanned angular range.

Claims

1. An evaluation method for a driver assistance system of a motor vehicle having a radar sensor for object detection, comprising:

synchronously emitting by the radar sensor at least two separate radar beam lobes which cover an angular scan range;

receiving by the radar sensor at least two respective target responses of the at least two separate radar beam lobes as measured values; and

arithmetically superposing the at least two target responses of the at least two separate radar beam lobes to generate at least one synthetic radar beam lobe having at least one predetermined zero value in the angular scan range.

2. The evaluation method as recited in claim 1, wherein the arithmetic superposition is carried out using a complex weighting of at least one of the at least two target responses in such a way that, for a target object detected at the at least one predetermined zero value, the at least two target responses add up to zero.

3. The evaluation method as recited in claim 1, wherein the at least one predetermined zero value is placed at the angular value of a detected target object.

4. The evaluation method as recited in claim 1, wherein the at least one predetermined zero value is placed at the angular value of the middle of a road lane lying ahead of the motor vehicle.

5. The evaluation method as recited in claim 1, wherein a scanning displacement is carried out of the at least one predetermined zero value in the angular scan range.

6. A method for providing collision avoidance assistance for a motor vehicle, comprising:

synchronously emitting by the radar sensor at least two separate radar beam lobes which cover an angular scan range;

receiving by the radar sensor at least two respective target responses of the at least two separate radar beam lobes as measured values;

arithmetically superposing the at least two target responses of the at least two separate radar beam lobes to generate at least one synthetic radar beam lobe having at least one predetermined zero value in the angular scan range, wherein the at least one predetermined zero value is placed at the angular value of a detected target object; and

in response to the detected target object, providing an automated driving control of the motor vehicle.

7. A computer-readable storage medium encoded with a computer program having program codes which, when executed on a computer, control an evaluation method for a driver assistance system of a motor vehicle having a radar sensor for object detection, the method comprising:

synchronously emitting by the radar sensor at least two separate radar beam lobes which cover an angular scan range;

receiving by the radar sensor at least two respective target responses of the at least two separate radar beam lobes as measured values; and

arithmetically superposing the at least two target responses of the at least two separate radar beam lobes to generate at least one synthetic radar beam lobe having at least one predetermined zero value in the angular scan range.

8. A driver assistance system of a motor vehicle, comprising:

at least one radar sensor configured to a) synchronously emit at least two separate radar beam lobes which cover an angular scan range and b) receive at least two respective target responses of the at least two separate radar beam lobes as measured values; and

a control device configured to arithmetically superpose the at least two target responses of the at least two separate radar beam lobes to generate at least one synthetic radar beam lobe having at least one predetermined zero value in the angular scan range, wherein the at least one predetermined zero value is placed at the angular value of a detected target object.