System and method for occupancy sensing with enhanced functionality
First Claim
1. A load control system, comprising:
- an occupancy sensor for sensing an occupancy condition of a monitored area;
a light sensor for providing a lighting, signal. representative of a lighting, level of the monitored area; and
a wireless transceiver associated with the occupancy sensor, the wireless transceiver for receiving wireless signals from a remote device to configure the occupancy sensor from a remote location;
wherein said wireless transceiver is further configured to transmit wireless signals to the remote device, said transmitted wireless signals including information representative of an operational characteristic of said occupancy sensor during a previous time period, andwherein, regardless of the occupancy condition of the monitored area, an associated load is energized when the lighting signal indicates the lighting, ;
level is below a predetermined threshold lighting level.
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Accused Products
Abstract
A system and method provide fail-safe operation of a lighting system. A lighting level detector is used to obtain a baseline lighting level for a low-intensity light. If the detector measures less than the baseline level when an occupancy sensor determines the space is unoccupied, a high-intensity light is energized and an indication is provided to a user that the low-intensity light has failed. A method provides daylighting operation of a lighting system. An occupancy sensor can have Wi-Fi functionality to enable remote configuration of the sensor. A line voltage occupancy sensor can include an interface with low voltage devices. An occupancy sensor can include an integral interface to enable an external control system to override the sensor'"'"'s normal logic under emergency conditions. An occupancy sensor can include an active temperature compensation feature. An occupancy sensor can also incorporate an automatically adjustable coverage area.
51 Citations
14 Claims
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1. A load control system, comprising:
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an occupancy sensor for sensing an occupancy condition of a monitored area; a light sensor for providing a lighting, signal. representative of a lighting, level of the monitored area; and a wireless transceiver associated with the occupancy sensor, the wireless transceiver for receiving wireless signals from a remote device to configure the occupancy sensor from a remote location; wherein said wireless transceiver is further configured to transmit wireless signals to the remote device, said transmitted wireless signals including information representative of an operational characteristic of said occupancy sensor during a previous time period, and wherein, regardless of the occupancy condition of the monitored area, an associated load is energized when the lighting signal indicates the lighting, ;
level is below a predetermined threshold lighting level. - View Dependent Claims (2, 3, 4, 6, 7, 8)
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5. The load control system of claim t, further comprising a processor associated with the occupancy sensor, the processor for receiving the lighting signal and for energizing the load when the lighting signal indicates the lighting level is below the predetermined threshold lighting level.
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9. A method for controlling an electrical load, comprising:
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receiving, at a load control device, a lighting signal representative of a lighting level of a monitored area; energizing an electrical load when the lighting signal indicates the lighting level is below a predetermined threshold lighting level and an occupancy sensor associated with the monitored area indicates the monitored area is vacant; receiving, at the occupancy sensor, wireless signals from a remote device, said received wireless signals configuring the occupancy sensor; and transmitting, from said wireless occupancy sensor, wireless signals to the remote device, said transmitted wireless signals including information representative of an operational characteristic of said wireless occupancy sensor during a previous time period - View Dependent Claims (10, 11, 12, 13, 14)
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Specification