Method for Controlling a Working Platform, Control Device, and Inclination Angle Measuring System for a Working Platform

Patent metadata

Field	Value
Publication number	US-2021122620-A1
Application number	US-201816618989-A
Country	US
Kind code	A1
Filing date	May 25, 2018
Priority date	Jun 8, 2017
Publication date	Apr 29, 2021
Grant date	—

Abstract

A method controls a working platform having at least one distance sensor assigned to a wheel of the working platform. A time of flight of a measuring beam, which represents a beam emitted obliquely onto a track of the working platform by the distance sensor, is determined. The time of flight determined in this manner is compared with a reference time of flight in order to determine a change in the inclination angle of the working platform. A control signal for controlling the working platform is output on the basis of the inclination angle change. As a result, a change in the gradient of a track in front of each wheel is individually determined before the particular wheel travels on the track section with the inclination change.

First claim

1 . A method for controlling a working platform, the working platform comprising at least one distance sensor associated with a wheel of the working platform, the method comprising:
comparing a time of flight of a measurement beam emitted obliquely by the at least one distance sensor onto a track of the working platform and reflected from the track to a reference time of flight to ascertain an inclination angle change of the working platform; and outputting a control signal to control the working platform in dependence on the inclination angle change.

2 . The method as claimed in claim 1 , further comprising:
outputting the control signal in order to output a warning message to an operator of the working platform and/or to brake and/or stop the working platform.

3 . The method as claimed in claim 1 , further comprising:
emitting the measurement beam having a directional component in a travel direction or opposite to the travel direction of the working platform or having a directional component aligned on a trajectory of the working platform.

4 . The method as claimed in claim 3 , further comprising:
emitting the measurement beam having the directional component set using a steering angle setting of the wheel.

5 . The method as claimed in claim 1 , further comprising:
ascertaining an inclination angle change representing a descent when the time of flight is greater than the reference time of flight; and/or ascertaining an inclination angle change representing an ascent when the time of flight is less than the reference time of flight.

6 . The method as claimed in claim 1 , further comprising:
ascertaining the inclination angle change using a present inclination angle of the working platform and/or a permissible inclination angle of the working platform.

7 . The method as claimed in claim 1 , further comprising:
ascertaining the inclination angle change using at least one wheel dimension value representing a dimension of the wheel and/or an inclination profile of the track provided by a digital map.

8 . The method as claimed in claim 1 , wherein:
the working platform further comprises at least one further distance sensor associated with a further wheel of the working platform, and a further time of flight of a further measurement beam emitted obliquely by the further distance sensor onto the track and reflected from the track is compared to the reference time of flight to ascertain the inclination angle change.

9 . The method as claimed in claim 1 , wherein:
the working platform further comprises at least one second distance sensor associated with the wheel, and a second time of flight of a second measurement beam emitted obliquely by the second distance sensor opposite to the measurement beam onto the track and reflected from the track is compared to a second reference time of flight to ascertain a second inclination angle change.

10 . A control device, comprising:
a plurality of units configured to execute a method for controlling a working platform, wherein the working platform includes at least one distance sensor associated with a wheel of the working platform, and wherein the method includes (i) comparing a time of flight of a measurement beam emitted obliquely by the at least one distance sensor onto a track of the working platform and reflected from the track to a reference time of flight to ascertain an inclination angle change of the working platform, and (ii) outputting a control signal to control the working platform in dependence on the inclination angle change.

11 . An inclination angle measuring system for a working platform, comprising:
at least one distance sensor associated with a wheel of the working platform for emitting a measurement beam obliquely to a track of the working platform; and a control unit including a plurality of units configured to execute a method for controlling the working platform, wherein the method includes (i) comparing a time of flight of the measurement beam emitted obliquely by the at least one distance sensor onto the track of the working platform and reflected from the track to a reference time of flight to ascertain an inclination angle change of the working platform, and (ii) outputting a control signal to control the working platform in dependence on the inclination angle change.

12 . The method as claimed in claim 1 , wherein a computer program is configured to execute and/or control the method.

13 . The method as claimed in claim 12 , wherein the computer program is stored on a machine-readable storage medium.

Assignees

• Bosch Gmbh Robert

Inventors

• Schulz Udo
• Thiel Thomas
• Rosenstein Filip

Classifications

• B66F9/063 Primary

  Automatically guided · CPC title

• G01B11/026

  by measuring distance between sensor and object (G01B11/0608 takes precedence) · CPC title

• B66F17/006 Primary

  for working platforms · CPC title

• B66F9/0755

  Position control; Position detectors · CPC title

• B66F9/24 Primary

  Electrical devices or systems · CPC title