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Electronic demarcating system

A sensing system and cable technology, applied in control/regulation systems, non-electric variable control, instruments, etc., can solve problems such as rising prices of sine wave systems

Inactive Publication Date: 2005-08-24
HUSQVARNA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another problem with current sensing systems is that the price of sine wave systems has increased since they often require adjustment of frequency limiting components

Method used

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  • Electronic demarcating system
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Examples

Experimental program
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Embodiment Construction

[0019] The accompanying drawing shows an illustrative embodiment of the search system of the present invention. This illustrative example should not be construed as limiting the scope of the invention, since it is intended only to illustrate one implementation of a search system of the type to which the invention pertains. The purpose of the examples is to illustrate the scope of the invention.

[0020] figure 1 A search system is shown comprising an external search cable 1 for enclosing the area in which the robot 2 moves and manipulates. The external cable comprises a cable and a signal transmitter 3 which generates a signal in the form of an electric current transmitted through said cable. The system of an embodiment further comprises three further search cables 4-6, which also comprise cables. One of the above-mentioned search cables 4 uses the same signal generator 3, while the remaining search cables 5-6 each have a slave signal generator 7-8 which generates a signal ...

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Abstract

The present invention relates to a method and an electronic search system for operating an automatic device, preferably an automatic lawnmower. The system comprises at least one first electrical cable ( 1, 4, 5, 6 ) connected to at least one first signal generator ( 3, 7, 8 ) and at least one sensing system arranged on said device. Said sensing system detects at least one magnetic field being transmitted via said cable ( 1, 4, 5, 6 ) and propagating through the air, the sensing system transmitting a processed signal to at least one driving means which contributes to the movements of said device in relation to a surface. Said search system comprises means by which the first signal generator ( 3, 7, 8 ) of the present invention transmits a current through said first cable ( 3, 7, 8 ), said current during a part of time being is in a state of rest where it is substantially constant, said state periodically being interrupted by at least one first characteristic current pulse.

Description

technical field [0001] The invention relates to a method and an electric search system for operating an automatic device, in particular an automatic lawnmower, said system comprising at least one first cable connected to at least one first signal generator and at least one A sensing system on said device, said sensing system detecting at least one magnetic field transmitted via said cable and propagating through the air, said sensing system transmitting a processed signal to at least one drive means for said device Motion relative to a surface. Background technique [0002] The idea of ​​improving tools that work autonomously, such as robots for vacuuming or mowing grass, is old. Regardless of the fact that this is an old idea, until recently the aforementioned tools were not available to consumers. An example is the autonomous vacuum cleaner Trilobite TM and Automower TM . They both treat (shear or clean) a surface by moving it within and relative to an area that needs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01D34/00G05D1/02
CPCG05D2201/0208G05D1/0265G05D1/0225A01D2101/00A01D34/008
Inventor 尤尔弗·彼得森本格特-艾伦·伯格瓦尔
Owner HUSQVARNA AB
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