Detection of movement of a parked vehicle

Patent metadata

Field	Value
Publication number	US-10569755-B2
Application number	US-201515528931-A
Country	US
Kind code	B2
Filing date	Dec 8, 2015
Priority date	Dec 15, 2014
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A method for detecting a movement of a vehicle that has been shut down in a parked state, including: detecting a movement variable which describes a movement of the vehicle, integrating the movement variable, in a manner dependent on a movement direction of the vehicle, to obtain a movement travel, and, if the movement travel meets a predetermined condition, making a decision on the movement for detection.

First claim

The invention claimed is:

1. A method for detecting a movement of a vehicle which is shut down in a parked state, comprising:
acquiring, by a first wheel rotational speed sensor, a first movement variable which describes the movement of the vehicle,
acquiring, by a second wheel rotational speed sensor, a second movement variable which describes the movement of the vehicle,
determining, by a processor, a direction of movement of the vehicle with respect to a movement travel by comparing the first movement variable to the second movement variable,
integrating, by the processor, the first movement variable and the second movement variable as a function of the direction of movement of the vehicle, and
deciding, by the processor, on the movement to be detected if the movement travel satisfies a predetermined condition.

2. The method as claimed in claim 1 , wherein the vehicle comprises wheels, each having one wheel rotational speed sensor for outputting rotational speed pulses which are dependent on a rotational speed of the respective wheel, and wherein the movement variable is described by the rotational speed pulses.

3. The method as claimed in claim 2 , wherein a comparison of the rotational speed pulses from the wheel rotational speed sensor of a first wheel of the wheels of the vehicle and the rotational speed pulses from the wheel rotational speed sensor of a second wheel of the wheels of the vehicle is used to determine the duration of movement.

4. The method as claimed in claim 3 , wherein the comparison comprises comparing whether a rotational speed pulse from the wheel rotational speed sensor of the first wheel of the vehicle is directly followed chronologically by two rotational speed pulses from the wheel rotational speed sensor of the other wheel of the vehicle.

5. The method as claimed in claim 1 , further comprising:
acquiring a comparison movement variable which describes a comparison movement of the vehicle,
integrating the measured comparison movement variable as a function of a comparison movement direction of the vehicle with respect to a comparison movement travel, and
deciding on the movement to be detected if both the movement travel and the comparison movement travel satisfy the predetermined condition.

6. The method as claimed in claim 5 , wherein the comparison movement variable is described by the rotational speed pulses, and the comparison movement direction is determined on the basis of a comparison of the rotational speed pulses from the wheel rotational speed sensors of at least two wheels of the vehicle, at least one wheel of which is a third wheel of the wheels of the vehicle.

7. The method as claimed in claim 5 , wherein a number of comparison movements based on the decision on the movement to be detected and/or the predetermined condition are dependent on a gradient of an underlying surface on which the vehicle is standing.

8. The method as claimed in claim 1 , further comprising:
resetting the movement travel if the movement travel satisfies a further predetermined condition which is different from the predetermined condition.

9. A method for retensioning a parking brake which keeps a vehicle which has been shut down in a parked state in a stationary state comprising:
acquiring, by a first wheel rotational speed sensor, a first movement variable which describes the movement of the vehicle,
acquiring, by a second wheel rotational speed sensor, a second movement variable which describes the movement of the vehicle,
determining, by a processor, a direction of movement of the vehicle with respect to a movement travel by comparing the first movement variable to the second movement variable,
integrating, by the processor, the first movement variable and the second movement variable as a function of the direction of movement of the vehicle,
deciding, by the processor, on the movement to be detected if the movement travel satisfies a predetermined condition, and
retensioning of the parking brake on the basis of the detected movement.

10. A control device for carrying out a method for detecting a movement of a vehicle which is shut down in a parked state, comprising:
a first wheel rotational speed sensor configured to acquire a first movement variable which describes the movement of the vehicle,
a second wheel rotational speed sensor configured to acquire a second movement variable which describes the movement of the vehicle,
a processor configured to:
determine a direction of movement of the vehicle with respect to a movement travel by comparing the first movement variable to the second movement variable,
integrate the first movement variable and the second movement variable as a function of the direction of movement of the vehicle, and

decide on the movement to be detected if the movement travel satisfies a predetermined condition.

11. The method as claimed in claim 6 , wherein a number of comparison movements based on the decision on the movement to be detected and/or the predetermined condition are dependent on a gradient of an underlying surface on which the vehicle is standing.

Assignees

• Continental Teves Ag & Co Ohg

Inventors

• Maron Christof
• Schubert Stefan

Classifications

• B60T7/108 Primary

  with mechanisms to take up slack in the linkage to the brakes · CPC title

• B60T17/221 Primary

  Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M) · CPC title

• B60T7/12

  for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)} · CPC title

• B60T8/171

  Detecting parameters used in the regulation; Measuring values used in the regulation · CPC title

• B60T7/122

  for locking of reverse movement · CPC title