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US 11,181,878 B2Granted
Dual mode system for detecting occupancy of a room
AssigneeAdnoviv Inc.
InventorsAmy Diane Droitcour, Chenyan Song
Life of this patent
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Abstract
A method and system improve on the accuracy of and power consumption of occupancy detection systems. Embodiments may provide a dual mode system that includes a passive infrared sensor with low power consumption and a RADAR-based sensor with higher power consumption that is only powered when the system determines a room is occupied with the passive sensor and no new movement is detected after a threshold duration.
Claims10
A system for detecting occupancy in a room, comprising:
- an infrared sensor;
- a RADAR based sensor;
- and
- a processor connected to the infrared sensor and connected to the RADAR based sensor, wherein the processor is configured to:
- receive a signal from the infrared sensor detecting movement in the room,
- determine whether a first threshold duration of five minutes has passed since a most recent signal from the infrared sensor detecting movement in the room has been received,
- trigger operation of the RADAR based sensor based on the first threshold duration having passed since the most recent signal from the infrared sensor detecting movement in the room was received, wherein the RADAR based sensor is on for a second threshold duration of about thirty seconds
- determine whether the RADAR based sensor detects a presence of a person in the room,
- turn off the RADAR based sensor in response to at least one of:
- detecting the presence of a person in the room, or
- not detecting the presence of a person in the room during the second threshold duration, and
- switch back to receiving the signal from the infrared sensor.
9 more elements
A method for detecting occupancy in a room, comprising:
- receiving, by a processor, a signal from an infrared sensor detecting movement in the room;
- determining, by the processor, whether a first threshold duration has passed since a most recent signal from the infrared sensor detecting movement in the room has been received;
- triggering, by the processor, operation of a RADAR based sensor based on the first threshold duration having passed since the most recent signal from the infrared sensor detecting movement in the room was received;
- determining, by the processor, whether the RADAR based sensor detects a presence of a person in the room;
- in response to the RADAR based sensor detecting a presence of a person in the room, deactivating the RADAR based sensor and checking the infrared sensor again for movement in the room;
- determining whether a second threshold duration has passed since the RADAR based sensor detected the presence of a person in the room in the event the infrared sensor does not detect movement in the room, and
- re-activating the RADAR based sensor.
4 more elements
Dependencies are inferred from the claim text.