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Method for operating a surface treatment device

  • US 10,366,585 B2
  • Filed: 07/04/2016
  • Issued: 07/30/2019
  • Est. Priority Date: 07/14/2015
  • Status: Active Grant
First Claim
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1. A method for operating an automatically movable surface treatment device in the form of a cleaning device, comprising:

  • moving the surface treatment device in a room,detecting ultrasonic waves reflected at obstacles with an ultrasonic sensor on the surface treatment device to determine obstacles of the cleaning device,detecting sounds with the ultrasonic sensor,comparing frequencies of the sounds detected by the ultrasonic sensor with reference frequencies typically occurring in an event of a glass breakage, anddetermining an actual glass breakage in an event of a match between the detected frequencies and the reference frequencies, andcomparing with a measuring device that detects features of the room, a current state of the room with a state of the room according to a stored room map when the glass breakage is determined, wherein the surface treatment device is moved in the room in an area of a window or a door.

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