The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2018
Filed:
Dec. 06, 2013
Viking Gmbh, Langkampfen, AT;
Matthias Hans, Kiefersfelden, DE;
Viking GmbH, Langkampfen, AT;
Abstract
The invention relates to a method for operating a self-propelled lawnmower, which is moved on a surface (). The surface () is surrounded by a border delimitation wire () on which electrical signals () are transmitted. The transmitted signal () is received by at least one receiving coil () in the lawnmower () and induces a reception signal (EI), which is evaluated in an evaluation unit (). The evaluation unit () emits an output signal to a control unit (), on the basis of which the control unit () controls the direction of travel of the lawnmower (). In order to guarantee a safe operation of the lawnmower even in range of electromagnetic interference fields, the invention provides that the electrical signal () is transmitted with a predetermined pattern (M). The evaluation unit () of the lawnmower () processes the reception signal (EI) as a pattern, wherein the pattern (M') of the reception signal (EI) is compared to a predetermined reference pattern (RM). Information regarding the location of the lawnmower () inside or outside the border delimitation wire () is obtained from the comparison result. The control unit () will determine the direction of travel of the implement on the basis of this information.