Electronic demarcating system
First Claim
1. Method for operating an automatic device (2) by means of an electronic directing system, said system comprising 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 (11,12,13) arranged on said device (2), said sensing system (11,12,13) detecting 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,characterized in that said first signal generator (3,7,8) transmits a current through said first cable (1,4,5,6), said current during a part of time is in a state of rest were it is substantially constant, said state of rest periodically being interrupted by at least one first characteristic current pulse (20) and that said sensing system (11,12,13) synchronizes the time intervals (28,29) within which the system (11,12,13) detects magnetic fields based on the properties of said first current pulse (20), said first current pulse being transmitted through an electrical cable (1) that substantially demarcates the area within which the automatic device (2) intends to operate.
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Accused Products
Abstract
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 element which contributes to the movements of said device in relation to a surface.
73 Citations
56 Claims
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1. Method for operating an automatic device (2) by means of an electronic directing system, said system comprising 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 (11,12,13) arranged on said device (2), said sensing system (11,12,13) detecting 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,
characterized in that said first signal generator (3,7,8) transmits a current through said first cable (1,4,5,6), said current during a part of time is in a state of rest were it is substantially constant, said state of rest periodically being interrupted by at least one first characteristic current pulse (20) and that said sensing system (11,12,13) synchronizes the time intervals (28,29) within which the system (11,12,13) detects magnetic fields based on the properties of said first current pulse (20), said first current pulse being transmitted through an electrical cable (1) that substantially demarcates the area within which the automatic device (2) intends to operate.
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43. Electronic directing system operating an automatic device (2), said system comprising 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 (11,12,13) arranged on said device, said sensing system (11,12,13) detecting 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,
characterized in that said system comprises means by which said first signal generator (3,7,8) transmits a current through said first cable (1,4,5,6), said current during a part of time being in a state of rest were it is substantially constant, said state periodically being interrupted by at least one first characteristic current pulse (20) and that said sensing system (11,12,13) synchronize the time intervals (28,29) within which the system (11,12,13) detects magnetic fields based on the properties of said first current pulse (20), said first current pulse being transmitted through an electrical cable (1) that substantially demarcates the area within which the automatic device (2) intends to operate.
Specification