OCCUPANCY SENSOR WITH EMBEDDED SIGNALING CAPABILITY
First Claim
1. A lighting control system comprising:
- an occupancy sensor configured to provide an occupancy signal representative of occupancy of an area and a movement signal superimposed on the occupancy signal, the movement signal representative of movement activity in the area; and
a power pack coupled to the occupancy sensor and configured to receive the occupancy signal and the movement signal, the power pack comprising a relay configured to be coupled to a lighting circuit, and the power pack being configured to actuate the relay responsive to at least one of the occupancy signal and the movement signal.
1 Assignment
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Accused Products
Abstract
A lighting control system includes an enhanced occupancy sensor and/or an enhanced power pack, allowing for more sophisticated and/or accurate lighting control and energy management capability. In one example, the occupancy sensor provides additional information, such as information about movement detected in the monitored area, in the form of a signal superimposed on the occupancy signal, and a specialty power pack is configured to detect and respond to the superimposed information signal, thereby providing enhanced functionality to the lighting control system. The superimposed signal conveying the additional information is made high-speed/short-duration such that it is “invisible” to a conventional power pack and the occupancy sensor remains compatible with conventional power packs. The enhanced occupancy sensor may therefore be used seamlessly with both conventional and specialty power packs, and may be implemented as a “drop-in” component for legacy lighting control systems.
81 Citations
21 Claims
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1. A lighting control system comprising:
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an occupancy sensor configured to provide an occupancy signal representative of occupancy of an area and a movement signal superimposed on the occupancy signal, the movement signal representative of movement activity in the area; and a power pack coupled to the occupancy sensor and configured to receive the occupancy signal and the movement signal, the power pack comprising a relay configured to be coupled to a lighting circuit, and the power pack being configured to actuate the relay responsive to at least one of the occupancy signal and the movement signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling a lighting circuit, the method comprising:
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receiving an occupancy signal representative of an occupancy status of an area; detecting a second signal superimposed on the occupancy signal; and controlling the lighting circuit responsive to at least one of the occupancy signal and the second signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An occupancy sensor comprising:
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a sensor configured to detect movement in a monitored area; and a signal output coupled to sensor; wherein the occupancy sensor is configured to produce at the signal output an occupancy signal indicating that the monitored area is occupied responsive to a first instance of detected movement in the monitored area, and a movement signal superimposed on the occupancy signal. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification