Method and devices for detecting and rectifying problems in connection with a vehicle load

Patent metadata

Field	Value
Publication number	US-9902201-B2
Application number	US-201214367169-A
Country	US
Kind code	B2
Filing date	Nov 21, 2012
Priority date	Dec 22, 2011
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

In a method for recognizing a load state and for removing problems that may result from such a load state of a vehicle, measures are provided for recognizing the overall vehicle mass and/or load mass of a vehicle as well as for detecting a non-uniform load of a vehicle, and reaction possibilities are provided for the functionality, impaired by such a load, of a distance sensor situated on the vehicle.

First claim

What is claimed is:

1. A method for determining an asymmetrical load state of a vehicle, comprising:
emitting, by at least one transmitter, an output signal;
receiving, by at least one sensor, a reflected signal corresponding to the output signal reflected from a region of a roadway surface situated next to the vehicle;
evaluating, by an evaluation unit, the reflected signal to determine whether an asymmetrical load state of the vehicle is present;
wherein the at least one sensor is provided on a side region of the vehicle;
wherein two sensors are provided on two vehicle sides situated opposite one another;
wherein each sensor receives a reflected signal from a region of the roadway surface corresponding to a side of the vehicle on which the respective sensor is provided; and
wherein the evaluating of the reflected signals includes (i) generating a difference signal by comparing the reflected signals received by the two sensors, and (ii) recognizing an asymmetrical load state of the vehicle based on the difference signal;
evaluating an amplitude curve of each reflected signal; and
determining whether each reflected signal does not essentially originate from objects in the environment of the vehicle based on the evaluation of the amplitude curve.

2. The method as recited in claim 1 , further comprising:
informing, by at least one of an optical display and an acoustic signal, the driver regarding the asymmetrical load state.

3. The method as recited in claim 1 , further comprising:
calibrating the sensors in response to the determined load state of the vehicle, wherein the calibration includes at least modifying a subsequent evaluation of the reflected signals.

4. The method as recited in claim 1 , further comprising:
checking whether each reflected signal does not essentially originate from objects in the environment of the vehicle; wherein the checking includes determining whether an amplitude curve of each reflected signal has characteristics resulting from an environmental object present in the region of the roadway surface situated next to the vehicle.

5. The method as recited in claim 1 , further comprising:
calibrating the sensors in response to the determined load state of the vehicle; wherein the calibration of the sensors includes modifying the evaluation of the reflected signals such that subsequent reflected signals are evaluated as if the vehicle was in at least one of a uniformly loaded state and an unloaded state.

6. The method as recited in claim 1 , wherein the evaluation of the reflected signal includes evaluating an amplitude curve of the reflected signal.

7. A device for recognizing and evaluating an asymmetrical load state of a vehicle, comprising:
at least one transmitter for emitting an output signal;
at least one sensor situated on the vehicle for receiving a reflected signal corresponding to the output signal reflected from a region of a roadway surface situated next to the vehicle; and
an evaluation unit evaluating the reflected signal to determine whether an asymmetrical load state of the vehicle is present;
wherein the at least one sensor is provided on a side region of the vehicle;
wherein two sensors are provided on two vehicle sides situated opposite one another, each sensor receiving a reflected signal from a region of the roadway surface corresponding to a side of the vehicle on which the respective sensor is provided;
wherein the reflected signals are evaluated by (i) generating a difference signal by comparing the reflected signals received by the two sensors, and (ii) recognizing an asymmetrical load state of the vehicle based on the difference signal; and
wherein the evaluation device evaluates an amplitude curve of each reflected signal and determines whether each reflected signal does not essentially originate from objects in the environment of the vehicle based on the evaluation of the amplitude curve.

8. The device as recited in claim 7 , further comprising:
at least one of an optical display device and an acoustic signaling device for signaling to the driver information regarding the asymmetrical load state.

9. The device as recited in claim 7 , wherein the evaluation device calibrates the sensors in response to the determined load state of the vehicle, wherein the calibration includes modifying at least a subsequent evaluation of the reflected signals.

10. The device as recited in claim 7 , wherein the sensors are distance sensors configured as at least one of an ultrasound sensor, a radar sensor and a lidar sensor.

11. The device as recited in claim 7 , wherein the evaluation device checks whether each reflected signal does not essentially originate from objects in the environment of the vehicle; wherein the check includes a determination of whether an amplitude curve of each reflected signal has characteristics resulting from an environmental object present in the region of the roadway surface situated next to the vehicle.

12. The device as recited in claim 7 , wherein the evaluation device calibrates the sensors in response to the determined load state of the vehicle; wherein the calibration of the sensors includes modifying the evaluation of the reflected signals such that subsequent reflected signals are evaluated as if the vehicle was in at least one of a uniformly loaded state and an unloaded state.

13. The device as recited in claim 7 , wherein the evaluation of the reflected signal includes evaluating an amplitude curve of the reflected signal.

Assignees

• Bosch Gmbh Robert

Inventors

• Schneider Marcus
• Klee Ulrich
• Suessenbach Frank
• Hoffmann Christian

Classifications

• G01S15/872

  Combination of several systems for attitude determination (using inertial means G01C9/00, control of attitude G05D1/49) · CPC title

• G01S15/931

  of land vehicles · CPC title

• G01S17/02

  Systems using the reflection of electromagnetic waves other than radio waves (G01S17/66 takes precedence) · CPC title

• G01S15/02

  using reflection of acoustic waves (G01S15/66 takes precedence) · CPC title

• G01S15/08

  Systems for measuring distance only (indirect measurement G01S15/46) · CPC title