System and method for occupancy sensing using adjustable detection and load control profile
First Claim
1. An occupancy sensor, comprising:
- an occupancy sensing element;
a photodetector; and
a processor coupled to the occupancy sensing element and the photodetector, the processor programmed to;
(i) receive light signals from the photodetector;
(ii) receive occupancy signals from the occupancy sensing element;
(iii) place the occupancy sensor into at least one of a plurality of operating modes; and
(iv) control an associated load based on the selected operating mode and the received occupancy signals;
wherein the plurality of operating modes includes at least a first operating mode, a second operating mode, and a third operating mode,wherein in the first operating mode, the associated load is not energized regardless of whether the processor receives occupancy signals from the occupancy sensing element;
wherein the second operating mode is associated with a first predetermined time period that is different than the first operating mode, the processor energizes the associated load for a first amount of time during the first predetermined time period when an occupancy signal from the occupancy sensing element is received; and
wherein the third operating mode is associated with a second predetermined time period that is different than the first and second operating modes, the processor energizes the associated load for a second amount of time during the second predetermined time period when a received occupancy signal from the occupancy sensing element is received.
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Accused Products
Abstract
An occupancy sensor is disclosed including a passive infrared (PIR) sensing element, a temperature sensing element, and a processor. The processor receives temperature signals from the temperature sensing element and configures the occupancy sensor into a selected operating mode based the received temperature signal. The operating mode may be associated with a predetermined sensing threshold of the PIR sensing element. The processor controls an associated load based on the selected operating mode and the received occupancy signals. The occupancy sensor can alternatively include an occupancy sensing element and a photodetector. Based on the amount of light detected by the photodetector over time, the occupancy sensor can calculate a rough estimate of time of day, and can automatically adjust one or more sensing and/or operational characteristics based on that time of day determination. A photosensor may implement daylight harvesting based on different light levels associated with different times of day.
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Citations
19 Claims
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1. An occupancy sensor, comprising:
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an occupancy sensing element; a photodetector; and a processor coupled to the occupancy sensing element and the photodetector, the processor programmed to; (i) receive light signals from the photodetector; (ii) receive occupancy signals from the occupancy sensing element; (iii) place the occupancy sensor into at least one of a plurality of operating modes; and (iv) control an associated load based on the selected operating mode and the received occupancy signals; wherein the plurality of operating modes includes at least a first operating mode, a second operating mode, and a third operating mode, wherein in the first operating mode, the associated load is not energized regardless of whether the processor receives occupancy signals from the occupancy sensing element; wherein the second operating mode is associated with a first predetermined time period that is different than the first operating mode, the processor energizes the associated load for a first amount of time during the first predetermined time period when an occupancy signal from the occupancy sensing element is received; and wherein the third operating mode is associated with a second predetermined time period that is different than the first and second operating modes, the processor energizes the associated load for a second amount of time during the second predetermined time period when a received occupancy signal from the occupancy sensing element is received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An occupancy sensor, comprising:
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an occupancy sensing element; a photodetector; and a processor coupled to the occupancy sensing element and the photodetector, the processor programmed to; (i) receive light signals from the photodetector; (ii) receive occupancy signals from the occupancy sensing element; (iii) place the occupancy sensor into at least one of a plurality of operating modes; and (iv) control an associated load based on the selected operating mode and the received occupancy signals; wherein the plurality of operating modes includes at least a first operating mode, a second operating mode, and a third operating mode, wherein the first operating mode is associated with a first predetermined time period; wherein the second operating mode is associated with a second predetermined time period that is different than the first predetermined time period, the processor energizes the associated load for a first amount of time during the second predetermined time period when an occupancy signal from the occupancy sensing element is received; and wherein the third operating mode is associated with a third predetermined time period that is different than the first and second predetermined time periods, the processor energizes the associated load for a second amount of time during the third predetermined time period when a received occupancy signal from the occupancy sensing element is received. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification