Method and system for localisation on a dc lighting and power grid
AssigneeKoninklijke Philips N.V.
InventorsAlan James Davie, Andrew Alexander Takmakoff, Paul RIchard Simons
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Abstract
The present disclosure is directed to methods and apparatus for locating luminaires within a lighting system where multiple luminaires are located on a grid of DC power rails. The AC signal generator connects to each DC power rail and transmits an AC signal along each DC power rail in turn to luminaires that each compute their distance from the generator based upon the AC signal. The AC signal generator may similarly transmit and receive data communications with luminaires across DC power rails.
Claims25
A method for locating a luminaire (250) on a DC grid, the DC grid comprising a first DC grid power line (240), an AC signal generator (235) switchably connected to the first DC grid power line, and a first luminaire in electrical communication with the first DC grid power line, the first luminaire disposed along the first DC grid power line at a first distance from the AC signal generator, the method comprising the steps of:
- connecting the AC signal generator to the first DC grid power line;
- transmitting, by the AC signal generator, an AC signal along the first DC grid power line;
- receiving the AC signal by the first luminaire;
- and
- calculating the first distance between the AC signal generator and the first luminaire, based in part upon the AC signal.
A system comprising:
- a DC power grid comprising a plurality of DC power lines (240);
- an AC signal generator (235) switchably connected to at least one of said plurality of DC grid power lines, said AC signal generator configured to transmit a locator signal along said at least one of the plurality of DC grid power lines;
- and
- a plurality of luminaires (250) disposed upon said DC power grid, each of said luminaires comprising a receiver configured to receive said locator signal, logic circuitry configured to calculate a distance between said luminaire and said AC signal generator based on said locator signal, memory configured to store said distance, and means for transmitting said distance to a room controller (260).
A method comprising the steps of:
- providing a DC power grid comprising a plurality of DC power lines (240) and a plurality of luminaires (250) disposed upon said plurality of DC power lines;
- selecting a first luminaire from said plurality of luminaires;
- assigning an ID to said first luminaire;
- associating said first luminaire with a first DC power line;
- storing a first coordinate index comprising the association between said first luminaire and said first DC power line;
- calculating a position of said first luminaire in relation to said first DC power line;
- storing a second coordinate index comprising said position of said first luminaire in relation to said first DC power line;
- and
- communicating said ID, said first coordinate index and said second coordinate index to a room controller (260).
A method for controlling a first luminaire in electrical communication with a first DC grid power line (240) on a DC grid, said first luminaire (250) comprising a first luminaire data transceiver, said DC grid comprising said first DC grid power line, a grid data transceiver (235) switchably connected to said first DC grid power line, and said first luminaire, the method comprising the steps of:
- connecting the grid data transceiver to the first DC grid power line;
- transmitting, by the grid data transceiver, a first data signal along the first DC grid power line;
- and
- receiving the first data signal by the first luminaire data transceiver.
Dependencies are inferred from the claim text.