Lighting commissioning
First Claim
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1. A lighting commissioning system comprising:
- a plurality of luminaires, each luminaire co-located with a light source and a light sensor;
a controller configured to selectively control the light sources to emit light and to receive signals from the light sensors representative of light sensed thereby; and
a memory accessible to the controller;
wherein the controller is configured to execute a first phase of commissioning to determine at least one reflectance value associated with a reflecting surface in a light path to each light sensor, and to store the reflectance values in the memory, and a second phase of commissioning in which the reflectance values are accessed by the controller for converting light sensed by each light sensor from an emitting light source into a measure of distance between the emitting light source and each light sensor;
wherein the controller is configured in the first phase of commissioning to carry out the steps of;
activating a light source of a first luminaire;
measuring light reflected from a local area to a light sensor on the first luminaire;
determining a reflection coefficient for the local area; and
repeating the steps for at least one neighboring luminaire to thereby determine at least one additional coefficient for a local area under the neighboring luminaire; and
executing an algorithm to calculate the at least one reflectance value associated with the reflecting surface which lies between the local area of the first luminaire and the local area of the at least one neighboring luminaire.
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Abstract
A method of determining a distance from a first luminaire (22) to a second luminaire (22) comprises causing a light source co-located with the second luminaire to emit light directed towards a reflecting surface (A). The method further comprises detecting a level of reflected light from the reflecting surface using a sensor co-located with the first luminaire (22), and accessing a reflectance value determined for the reflecting surface (A). The method further comprises modifying the level of reflected light to take into account the accessed reflectance value, and using the modified measure to provide a measure of a distance between the first and second luminaires.
12 Citations
13 Claims
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1. A lighting commissioning system comprising:
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a plurality of luminaires, each luminaire co-located with a light source and a light sensor; a controller configured to selectively control the light sources to emit light and to receive signals from the light sensors representative of light sensed thereby; and a memory accessible to the controller; wherein the controller is configured to execute a first phase of commissioning to determine at least one reflectance value associated with a reflecting surface in a light path to each light sensor, and to store the reflectance values in the memory, and a second phase of commissioning in which the reflectance values are accessed by the controller for converting light sensed by each light sensor from an emitting light source into a measure of distance between the emitting light source and each light sensor; wherein the controller is configured in the first phase of commissioning to carry out the steps of; activating a light source of a first luminaire; measuring light reflected from a local area to a light sensor on the first luminaire; determining a reflection coefficient for the local area; and repeating the steps for at least one neighboring luminaire to thereby determine at least one additional coefficient for a local area under the neighboring luminaire; and executing an algorithm to calculate the at least one reflectance value associated with the reflecting surface which lies between the local area of the first luminaire and the local area of the at least one neighboring luminaire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining a distance from a first luminaire to a second luminaire comprising:
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causing a light source co-located with the second luminaire to emit light directed towards a reflecting surface; detecting a level of reflected light from the reflecting surface using a sensor co-located with the first luminaire; accessing a reflectance value determined for the reflecting surface; modifying the detected level of reflected light to take into account the accessed reflectance value; and using the modified measure to provide a measure of a distance between the first and second luminaires. - View Dependent Claims (12, 13)
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Specification