Validating the application of occupancy sensor networks for lighting control Free dating site 100 free supports nudity photo
19, 2011, and entitled “Methods, Systems, and Apparatus for Daylight Harvesting,” which application is hereby incorporated herein by reference in its entirety. In one exemplary implementation, a lighting apparatus according to one embodiment includes a state machine having one control output, e.g., a “dimming level” for illumination provided by the apparatus, and one input, e.g., a “sensor input” from an occupancy or motion sensor. In yet another aspect, by providing multiple inputs on which the state machine can act, and multiple states accommodated/implemented by the state machine, illumination generated by one or more lighting apparatus may be controlled in a sophisticated and complex manner to reduce energy consumption, increase user comfort in connection with a quality of illumination, and in some instances optimize virtually any measureable variable associated with the lighting fixture(s).
In one aspect, the state machine of a given apparatus independently controls the operation of the apparatus based at least on the occupancy or motion sensor, and optionally one or more other sensors (e.g., that provide various information about the environment being illuminated by the fixture). In one exemplary embodiment, an LED-based lighting apparatus includes an occupancy or motion sensor, an ambient light sensor, a state machine controller, memory, and one or more communication interfaces to provide for communication between the lighting apparatus and a central controller (e.g., external/remote computer-based controller), and/or between any two or more LED-based lighting apparatus. For purposes of the present disclosure, “occupancy-based” refers to any of a variety of sensing modalities (e.g., motion sensing, distance/proximity sensing, infrared or heat sensing, etc.) that facilitate detection of a presence (and/or an absence) of an object of interest and/or a person in an area to be illuminated (e.g., within a particular range/distance of one or more lighting fixtures providing illumination, and/or within an area substantially corresponding to a footprint of the illumination on ground, pavement or other surface, etc.). A state machine implements a finite number of states, transitions between those states, and actions that may be taken in one or more of the states. As would be readily appreciated by one of skill in the art, a state machine is a behavioral model that may be implemented by one or more hardware or software controllers (e.g., employing digital logic circuitry, and/or one or more processors executing instructions).