Method for synergistic occupancy sensing in commercial real estates

• US 9,703,274 B2
• Filed: 02/08/2013
• Issued: 07/11/2017
• Est. Priority Date: 10/12/2012
• Status: Active Grant

• Current Assignee: Colgate-Palmolive Company, Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Li, Du
• Primary Examiner(s): Karim, Ziaul
• Application Number:
  US13/763,202
• Publication Number:
  US 20140107846A1
• Time in Patent Office: 1,614 Days
• Field of Search: 700275-277
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/38 Failure diagnosis
• CPC Class Codes: F24F 2120/10 Occupancy
• CPC Class Codes: G01S 15/04 Systems determining presence of a target
• CPC Class Codes: G01S 15/86 Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
• CPC Class Codes: G01S 5/0252 Radio frequency fingerprinting
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 2219/2614 HVAC, heating, ventillation, climate control
• CPC Class Codes: G05B 2219/2642 Domotique, domestic, home control, automation, smart house
• CPC Class Codes: H04L 67/54 Presence management, e.g. monitoring or registration for receipt of user log-on information, or the connection status of the users
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/33 for indoor environments, e.g. buildings
• CPC Class Codes: H04W 4/38 for collecting sensor information
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method to synergistically sense occupancy inside a building. A coarse-grained sensor in the building generates a coarse data indicating a user is in a large area including a control zone. A fine-grained sensor in the building generates a fine data indicating the user is in a small area. The fine data is more accurate but less reliable than the coarse data. The method to improve energy efficiency by generating an actuation plan for the control zone. The method includes receiving the coarse data and the fine data, normalizing the coarse data and the fine data, checking for an overlap between the large area and the small area, calculating a change in occupancy in the control zone based on the normalized coarse data if there is no overlap and based on the normalized fine data if there is overlap, and generating the actuation plan based on the change in occupancy.

Claims

1. A method executed by a computer system implementing a building automation system, the building automation system to synergistically sense occupancy inside a building, where the building includes a plurality of control zones, a coarse-grained sensor, and a fine-grained sensor, where the coarse-grained sensor generates a coarse data indicating that a user is in a first area of the building, where the first area includes a control zone in the plurality of control zones and is larger than the control zone, where the fine-grained sensor generates a fine data indicating that the user is in a second area of the building, where the second area is equal in size to or smaller than the control zone, and where the fine data is more accurate but less reliable than the coarse data, the method to improve energy efficiency in the building by generating an actuation plan for the control zone based on the coarse data and the fine data, the method comprising the steps of:

receiving the coarse data from the coarse-grained sensor, the coarse data having a first format;

receiving the fine data from the fine-grained sensor, the fine data having a second format different from the first format;

normalizing the coarse data into a normalized coarse data;

normalizing the fine data into a normalized fine data, wherein the normalized coarse data and the normalized fine data have a shared third format;

checking for an overlap between the first area of the building and the second area of the building using spatial boundary data and size of the first area of the building and the second area of the building;

calculating a change in occupancy in the control zone using the normalized coarse data where there is no overlap between the first area of the building and the second area of the building;

calculating the change in occupancy in the control zone using the normalized fine data where there is overlap between the first area of the building and the second area of the building;

generating the actuation plan for the control zone based on the change in occupancy in the control zone;

setting a number of area occupants for at least one of the normalized coarse data and the normalized fine data based on at least one of the coarse data and the fine data; and

determining a number of zone occupants in the control zone based on the number of area occupants;

checking whether the number of zone occupants in the control zone has reached a preset threshold; and

causing a resource to be allocated to a device in the control zone.

2. The method of claim 1, further comprising the steps of:

retrieving an area-identifier (ID) based on a sensor-identifier (ID) that is included in the coarse data or the fine data;

setting the area-ID for the normalized coarse data or the normalized fine data; and

retrieving a spatial relationship data based on the area-ID, wherein the spatial relationship data indicates a relationship between two areas in the building.

3. The method of claim 1, further comprising the steps of:

retrieving a user-identifier (ID) based on a device-identifier (ID) that is included in the coarse data or the fine data; and

setting the user-ID for the normalized coarse data or the normalized fine data.

4. The method of claim 1, further comprising the step of:

determining that the user is in an area smaller than the second area based on the overlap between the first area and the second area.

5. The method of claim 1, further comprising the steps of:

checking whether the control zone changed from an unoccupied status to an occupied status; and

causing an auto-on device in the control zone to turn on in response to the change in occupied status, where the auto-on device is any one of a lighting device, heating device, ventilation device, air conditioning device or safety device.

6. The method of claim 1, further comprising the steps of:

checking whether the control zone changed from an occupied status to an unoccupied status; and

causing an auto-off device in the control zone to turn off in response to the change in unoccupied status, where the auto-off device is any one of a lighting device, heating device, ventilation device, air conditioning device or safety device.

7. The method of claim 6, further comprising the step of:

waiting for a preset amount of time before causing the auto-off device to turn off.

8. A computer system implementing a building automation system, the building automation system to synergistically sense occupancy inside a building, wherein the building includes a plurality of control zones, a coarse-grained sensor, and a fine-grained sensor, wherein the coarse-grained sensor generates a coarse data indicating that a user is in a first area of the building, wherein the first area includes a control zone in the plurality of control zones and is larger than the control zone, wherein the fine-grained sensor generates a fine data indicating that the user is in a second area of the building, wherein the second area is equal in size to or smaller than the control zone, and wherein the fine data is more accurate but less reliable than the coarse data, the computer system to improve energy efficiency in the building by generating an actuation plan for the control zone based on the coarse data and the fine data, the computer system comprising:

a transceiver port configured to receive the coarse data from the coarse-grained sensor, and to receive the fine data from the fine-grained sensor, the coarse data having a first format and the fine data having a second format different from the first format; and

a computer processor coupled to the transceiver port and configured to execute a normalizing module and a synergistic control module,

the normalizing module configured to normalize the coarse data into a normalized coarse data, and to normalize the fine data into a normalized fine data, wherein the normalized coarse data and the normalized fine data have a shared third format, and

the synergistic control module configured to check for an overlap between the first area of the building and the second area of the building using spatial boundary data and size of the first area of the building and the second area of the building, to calculate a change in occupancy in the control zone using the normalized coarse data in response to finding that there is no overlap between the first area of the building and the second area of the building, to calculate the change in occupancy in the control zone using the normalized fine data in response to finding that there is overlap between the first area of the building and the second area of the building, and to generate the actuation plan for the control zone based on the change in occupancy in the control zone, wherein the normalizing module is further configured to set a number of area occupants for at least one of the normalized coarse data and the normalized fine data based on at least one of the coarse data and the fine data, and to determine a number of zone occupants in the control zone based on the number of area occupants, and

wherein the synergistic control module is further configured to check whether the number of zone occupants in the control zone has reached a preset threshold, and to cause a resource to be allocated to a device in the control zone.

9. The computer system of claim 8, further comprising:

a storage device coupled to the computer processor and configured to store a building data storage,

the building data storage configured to store a sensor-identifier (ID) with a corresponding area-identifier (ID), and to store a spatial relationship data, wherein the spatial relationship data indicates a relationship between two areas in the building,

wherein the normalizing module is further configured to retrieve the area-ID from the building data storage based on the sensor-ID that is included in the coarse data or the fine data, to set the area-ID for the normalized coarse data or the normalized fine data, and to retrieve the spatial relationship data based on the area-ID.

10. The computer system of claim 8, further comprising:

a storage device coupled to the computer processor and configured to store a user data storage,

the user data storage configured to store a device-(identifier) ID with a corresponding user-identifier (ID),

wherein the normalizing module is further configured to retrieve the user-ID from the user data storage based on the device-ID that is included in the coarse data or the fine data, and to set the user-ID for the normalized coarse data or the normalized fine data.

11. The computer system of claim 8, wherein the synergistic control module is further configured to determine that the user is in an area smaller than the second area based on the overlap between the first area and the second area.

12. The computer system of claim 8, wherein the synergistic control module is further configured to check whether the control zone changed from an unoccupied status to an occupied status, and to cause an auto-on device in the control zone to turn on in response to the change in occupied status, where the auto-on device is any one of a lighting device, heating device, ventilation device, air conditioning device or safety device.

13. The computer system of claim 8, wherein the synergistic control module is further configured to check whether the control zone changed from an occupied status to an unoccupied status, and to cause an auto-off device in the control zone to turn off in response to the change in unoccupied status, where the auto-off device is any one of a lighting device, heating device, ventilation device, air conditioning device or safety device.

14. The computer system of claim 13, wherein the synergistic control module is further configured to wait for a preset amount of time before causing the auto-off device to turn off.