Abstract: A system and method for determining a number of occupants at a location using multiple modalities. The method includes gathering a first data set with a motion sensor of the lighting system. A second data set is gathered with a transceiver of an RF subsystem. First and second estimates are calculated from the second data set using first and second algorithms. The first estimate and the second estimate are fused to create a fused occupant estimate. The first algorithm, the second algorithm, or both the first algorithm and the second algorithm are trained by inputting the second occupant estimate and/or the second set of data to recalibrate parameters of the first algorithm and/or inputting the first occupant estimate and/or the first set of data to recalibrate parameters during training of the second algorithm. A building control system can operated in response to the fused occupant estimate.

Abstract: A detection system (10) and a detection method (2000) are disclosed herein. The system includes a PIR sensor (12) positioned in an area comprising a plurality of sub-areas, the motion sensor comprising an optical device (22) having a plurality of sub-lenses (26, 28, 30), each sub-lens of the plurality of sub-lenses having a field of view (FOV) corresponding to a sub-area of the plurality of sub-areas. The system further includes at least one processor (32) coupled to the PIR sensor and configured to: activate the plurality of sub-lenses to generate a total sensor FOV comprising each FOV of the plurality of sub-lenses; and dynamically control the plurality of sub-lenses to subdivide the total sensor FOV, wherein the subdivided sensor FOV is smaller than the total sensor FOV.

Abstract: A system and method for determining a number of occupants at a location using multiple modalities. The method includes gathering a first data set with a motion sensor of the lighting system. A second data set is gathered with a transceiver of an RF subsystem. First and second estimates are calculated from the second data set using first and second algorithms. The first estimate and the second estimate are fused to create a fused occupant estimate. The first algorithm, the second algorithm, or both the first algorithm and the second algorithm are trained by inputting the second occupant estimate and/or the second set of data to recalibrate parameters of the first algorithm and/or inputting the first occupant estimate and/or the first set of data to recalibrate parameters during training of the second algorithm. A building control system can operated in response to the fused occupant estimate.

Abstract: An energy audit system (1400), including at least one controller (1410) which may obtain attribute information (AI) for an energy consuming space, the AI including information related to a plurality of attributes and corresponding attribute choice information for each of the plurality of attributes; determine dependencies of each of the plurality of attributes; determine a ranking of each of the attributes based upon a dependency score of each of the attributes; determine an optimized workflow based upon the ranking of each of the attributes; and/or renders a user interface (UI) in accordance with the optimized workflow.

Abstract: An energy audit system (1400), including at least one controller (1410) which may obtain attribute information (AI) for an energy consuming space, the AI including information related to a plurality of attributes and corresponding attribute choice information for each of the plurality of attributes; determine dependencies of each of the plurality of attributes; determine a ranking of each of the attributes based upon a dependency score of each of the attributes; determine an optimized workflow based upon the ranking of each of the attributes; and/or renders a user interface (UI) in accordance with the optimized workflow.

Abstract: A system (700) having at least one controller (710) which may obtain space attribute information (103) including information related to identity, use type, square area, occupant density, and daylight illumination a plurality of spaces of a building; cluster (109) the plurality of spaces into one or more classes in accordance with energy consumption and energy savings potentials of the plurality of spaces, wherein each class has class attributes which define the class; determine a priority value (113) for each of the one or more classes based upon the class attributes of each class of the one or more classes; and assign one or more sensors (115) of a plurality of sensors (760) to one or more classes in accordance with the determined priority value for each corresponding class of the plurality of classes.

Abstract: A circuit for detecting if a load supplied with a high frequency AC power source is asymmetrical. The input voltage and a DC blocking voltage are connected to a differential amplifier circuit, and any difference in voltage is signaled. The load voltage and the DC blocking voltage are each reduced, for example, to 10% and 20%, respectively, while keeping them proportional to their respective full values.

Abstract: The present invention provides a circuit for detecting if a load being supplied with a high frequency AC power source is asymmetrical. The input voltage and the DC blocking voltage are connected to a differential amplifier circuit, and any difference in voltage is signaled. The load voltage and the DC blocking voltage are each reduced, for example to 10% and 20% respectively, while keeping them proportional to their respective full values.

Abstract: An electronic ballast is provided for converting an AC voltage and current, supplied by a power source such as a power line, to an alternating square-wave voltage and current having the same frequency, for supply to a discharge lamp. The ballast includes at least one capacitor, bridge switches and high-frequency duty-cycle switches. The bridge switches and the high-frequency duty-cycle switches cooperate to successively electrically connect the capacitor in parallel with the power source, electrically connect the capacitor in series with the power source and the discharge lamp, and to regulate the current provided to and from the capacitor to drive the discharge lamp with a desired square-wave voltage and current at the line frequency.

Abstract: An electronic ballast for a discharge lamp includes a capacitive storage device which is serially connected with an AC power source and the lamp. A first combination of switches, arranged in a bridge configuration, alternately reverse the polarity in which the capacitive storage device is connected. A second combination of switches periodically bypasses the capacitive storage device and momentarily places the AC power source directly in series with the lamp.