Using sensors to detect movement of light fixtures
AssigneeSignify Holding B.V.
InventorsJonathan Andrew Whitten, Satinderjeet Kaur, Stephen Paul Kotz, Christopher J. Harris
Life of this patent
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Abstract
A light fixture can include a housing and a sensor device having a sensor that measures at least one parameter associated with a position of the housing. The light fixture can also include a controller coupled to the sensor device. The controller can receive multiple measurements of the at least one parameter taken by the sensor device. The controller can also evaluate each measurement against at least one range of acceptable values. The controller can further send a notification when a measurement falls outside the at least one range of acceptable values. The notification can state that the housing is moved out of position and requires attention.
Claims20
A light fixture for monitoring the position of another light fixture, the light fixture comprising:
- a housing;
- a plurality of antennas, wherein each antenna of the plurality of antennas is configured to receive a communication signal from the another light fixture mounted in a fixed location;
- and
- a controller coupled to the plurality of antennas, wherein the controller is configured to:
- determine an angle of arrival for the communication signal received by each of the plurality of antennas;
- determine that the angle of arrival falls outside a range of expected values that is established based on prior angle of arrival values associated with prior communication signals received by the plurality of antennas and broadcast by the another light fixture;
- determine, over a period of time, that the another light fixture is not temporarily out of the fixed position;
- and
- send, after ensuring that the another light fixture is not temporarily out of the fixed position, a notification to communicate that the another light fixture has changed position from the fixed location.
A lighting system used to monitor the position of light fixtures, the lighting system comprising:
- a first light fixture comprising:
- a first housing mounted in a fixed location;
- and
- a transmitter that sends communication signals;
- and
- a second light fixture comprising:
- a second housing;
- at least one antenna that receives the communication signals transmitted by the transmitter;
- and
- a controller coupled to the at least one antenna, wherein the controller:
- determines a signal strength for each of the communication signals transmitted by the transmitter;
- determines that the signal strength of one of the communication signals received by the at least one antenna from the first light fixture at a first time falls outside a range of expected values that is established based on prior signal strength values associated with prior communication signals received by the at least one antenna and broadcast by the first light fixture prior to the first time, wherein the signal strength of the one of the communication signals falling outside the range of expected values indicates that the first housing of the first light fixture has changed position from the fixed location;
- determines, over a period of time after the first time, that the first housing of the first light fixture is not temporarily out of the fixed position;
- and
- sends, after confirming that the first housing of the first light fixture is not temporarily out of the fixed position, a notification to communicate that the first housing of the first light fixture has changed position from the fixed location.
A device for monitoring the position of a light fixture, the device comprising:
- at least one antenna coupled to another light fixture, wherein each of the at least one antenna is configured to receive a communication signal from the light fixture mounted in a fixed location;
- and
- a controller coupled to the at least one antenna, wherein the controller is configured to:
- determine an angle of arrival for the communication signal received by the at least one antenna;
- determine that the angle of arrival falls outside a range of expected values that is established based on prior angle of arrival values associated with prior communication signals received by the at least one antenna and broadcast by the light fixture;
- and
- send, after determining over a period of time that the light fixture has permanently changed position from the fixed location, a notification to communicate that the light fixture has changed position from the fixed location.
Dependencies are inferred from the claim text.