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US 8,410,728 B2Granted
Method of and device for controlling shed lighting
AssigneeLely Patent N.V.
InventorPaul Hulsen
Life of this patent
Estimating the term…
Abstract
A method of, and a device for controlling a shed lighting, and a shed provided therewith. To support daylight, lamps are switched on, but only in the case when the measured intensity is too low and, moreover, the time in which the daylight intensity could become sufficient is too short to achieve a desired period of time with a minimum light intensity. This saves energy and service life of lamps.
Claims17
A method of controlling a shed lighting, wherein the shed lighting comprises daylight, a plurality of additional lighting and at least one lighting intensity sensor, the method comprising:
- measuring a light intensity in the shed;
- controlling, depending on the measured light intensity, at least a part of the additional lighting, in order to daily provide a light duration with a first length and a minimum light intensity Ilight in the shed;
- measuring, for a current day, a total time elapsed in which the measured light intensity amounts to at least Ilight;
- determining an evening twilight point of time at which, using only the daylight, the light intensity no longer reaches the value Ilight;
- and
- only switching on at least a part of the additional lighting when a momentary intensity is smaller than Ilight and the light duration minus the total time elapsed is longer than the momentary time still to elapse until the evening twilight point of time.
3 more elements
A shed lighting device, comprising:
- a daylight mechanism;
- at least one lighting intensity sensor configured for measuring a light intensity;
- at least one controllable additional lighting;
- and
- at least one control device controlling the controllable additional lighting on the basis of the measured light intensity, wherein the control device is configured to:
- measure a total time elapsed in which the measured light intensity amounts to at least Ilight for a current day,
- determine an evening twilight point of time at which the light intensity no longer reaches the value Ilight, and
- switch on only at least a part of the additional lighting when a momentary intensity is smaller than Ilight and a momentary time still to elapse until the evening twilight point of time is shorter than a desired light duration minus the total elapsed time.
5 more elements
Dependencies are inferred from the claim text.