Electrical event detection device and method of detecting and classifying electrical power usage

• US 8,712,732 B2
• Filed: 04/26/2011
• Issued: 04/29/2014
• Est. Priority Date: 09/18/2007
• Status: Active Grant

• Current Assignee: Belkin International Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Belkin International Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Patel, Shwetak N., Reynolds, Matthew S., Gupta, Sidhant, Yogeeswaran, Karthik
• Primary Examiner(s): Le, John H
• Application Number:
  US13/392,313
• Publication Number:
  US 20130179124A1
• Time in Patent Office: 1,099 Days
• Field of Search: 702/60, 702/61, 702/62, 702/65, 702/66, 702/75, 702/77, 702/188, 702/190, 702/191, 702/58, 340/657
• US Class Current: 702/190
• CPC Class Codes: G01D 2204/24 Identification of individual loads, e.g. by analysing current/voltage waveforms
• CPC Class Codes: G01R 19/0007 Frequency selective voltage or current level measuring measuring frequency G01R23/00; testing attenuation in line transmission systems H04B3/48; monitoring testing in transmission systems H04B17/00
• CPC Class Codes: G01R 19/2513 Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: G01R 22/10 using digital techniques
• CPC Class Codes: G01R 31/2825 in household appliances or professional audio/video equipment testing LAN's H04L43/50; testing TV systems H04N17/00; testing loudspeakers H04R29/00
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

Some embodiments can concern an apparatus configured to detect an electrical state of one or more electrical devices. The one or more electrical devices are coupled to an electrical power infrastructure and generate one or more high-frequency electrical signals on the electrical power infrastructure. The apparatus can include: (a) a processing module configured to run on a processor of a computational unit; and (b) a sensing device configured to be coupled to an electrical outlet. The sensing device can have: (a) a data acquisition receiver configured to receive the one or more high-frequency electrical signals via the electrical outlet and convert the one or more high-frequency electrical signals into one or more first data signals when the sensing device is coupled to the electrical outlet. The electrical outlet can be electrically coupled to the electrical power infrastructure. The sensing device is in communication with the computational unit. The processing module is further configured to identify the electrical state of the one or more electrical devices at least in part using the one or more first data signals. The high-frequency electrical signals comprise electrical signals in the ten kilohertz to three megahertz range. Other embodiments are disclosed.

Claims

1. An apparatus configured to detect an electrical state of one or more electrical devices, the one or more electrical devices are coupled to an electrical power infrastructure and generate high-frequency electrical noise on the electrical power infrastructure, the apparatus comprises:

a processing module configured to run on a processor of a computational unit; and

a sensing device configured to be coupled to an electrical outlet, the sensing device comprising;

a data acquisition receiver configured to receive the high-frequency electrical noise via the electrical outlet and convert the high-frequency electrical noise into one or more first data signals when the sensing device is coupled to the electrical outlet,

wherein;

the electrical outlet is electrically coupled to the electrical power infrastructure;

the sensing device is in communication with the computational unit;

the processing module is further configured to identify the electrical state of the one or more electrical devices at least in part using the one or more first data signals;

the high-frequency electrical noise comprise substantially continuous electrical noise on the electrical power infrastructure in a ten kilohertz to three megahertz range; and

the substantially continuous electrical noise comprises (a) first electrical noise that is identifiable on the electrical power infrastructure for a first length of time that is greater than one alternating current electrical cycle, or (b) second electrical noise that is identifiable on the electrical power infrastructure for a second length of time that is less than one alternating current electrical cycle but the second electrical noise are repeated in three or more alternating current electrical cycles.

2. The apparatus of claim 1, wherein:

the processing module is further configured to determine electrical power consumed by the one or more electrical devices at least in part using the one or more first data signals.

3. The apparatus of claim 1, wherein:

the high-frequency electrical noise are generated by one or more switch mode power supplies; and

the one or more electrical devices comprise the one or more switch mode power supplies.

4. The apparatus of claim 1, wherein:

the data acquisition receiver comprises;

an analog-to-digital converter; and

a filter configured to pass the high-frequency electrical noise.

5. The apparatus of claim 1, wherein:

the processing module is configured to identify when a first one of the one or more electrical devices is turned on or turned off by using at least in part the one or more first data signals.

6. The apparatus of claim 1, wherein:

the processing module is further configured to identify the electrical state of the one or more electrical devices using the one or more first data signals and data from at least one of;

a first database from a regulatory agency;

a second database, the second database is storing data regarding previously observed data signals;

one or more labels of the one or more electrical devices;

or

user identification of the one or more electrical devices.

7. The apparatus of claim 1, wherein:

the processing module comprises;

an event detection module configured to use the one or more first data signals to determine whether one or more electrical events have occurred;

a classification module configured to determine the electrical state of the one or more electrical devices using the one or more electrical events; and

a training module configured to correlate a first type of event with a first event of the one or more electrical events and a second type of event with a second event of the one or more electrical events.

8. The apparatus of claim 1, wherein:

the substantially continuous electrical noise comprises high frequency signals that are generated by at least one oscillator contained within at least one of the one or more electrical devices.

9. An apparatus configured to detect an electrical state of one or more electrical devices, the one or more electrical devices are coupled to an electrical power infrastructure and generate high-frequency electrical noise on the electrical power infrastructure, the apparatus comprises:

a processing module configured to run on a processor of a computational unit; and

a sensing device configured to be coupled to an electrical outlet, the sensing device comprising;

a data acquisition receiver configured to receive the high-frequency electrical noise via the electrical outlet and convert the high-frequency electrical noise into one or more first data signals when the sensing device is coupled to the electrical outlet,

wherein;

the electrical outlet is electrically coupled to the electrical power infrastructure;

the sensing device is in communication with the computational unit;

the processing module is further configured to identify the electrical state of the one or more electrical devices at least in part using the one or more first data signals;

the high-frequency electrical noise comprise electrical noise in a ten kilohertz to three megahertz range;

the processing module is further configured to determine a baseline noise signature of the one or more first data signals;

the processing module is further configured to determine one or more amplitude or frequency components in the one or more first data signals that are a predetermined threshold amount above the baseline noise signature of the one or more first data signals; and

the processing module is further configured to associate at least one electrical device with the one or more amplitude or frequency components in the one or more first data signals.

10. An apparatus configured to detect an electrical state of one or more electrical devices, the one or more electrical devices are coupled to an electrical power infrastructure and generate high-frequency electrical noise on the electrical power infrastructure, the apparatus comprises:

a processing module configured to run on a processor of a computational unit; and

a sensing device configured to be coupled to an electrical outlet, the sensing device comprising;

a data acquisition receiver configured to receive the high-frequency electrical noise via the electrical outlet and convert the high-frequency electrical noise into one or more first data signals when the sensing device is coupled to the electrical outlet,

wherein;

the electrical outlet is electrically coupled to the electrical power infrastructure;

the sensing device is in communication with the computational unit;

the processing module is further configured to identify the electrical state of the one or more electrical devices at least in part using the one or more first data signals;

the high-frequency electrical noise comprises substantially continuous electrical noise on the electrical power infrastructure in a ten kilohertz to three megahertz range; and

the substantially continuous electrical noise comprises high frequency signals that are cyclostationary with respect to an alternating current electrical cycle of the electrical power infrastructure.

11. The apparatus of claim 10, wherein:

the processing module is configured to identify when a first one of the one or more electrical devices is turned on or turned off by using at least in part the one or more first data signals.

12. The apparatus of claim 10, wherein:

the processing module comprises;

an event detection module configured to use the one or more first data signals to determine whether one or more electrical events have occurred;

a classification module configured to determine the electrical state of the one or more electrical devices using the one or more electrical events; and

a training module configured to correlate a first type of event with a first event of the one or more electrical events and a second type of event with a second event of the one or more electrical events.

13. The apparatus of claim 10, wherein:

the processing module is further configured to identify the electrical state of the one or more electrical devices using the one or more first data signals and data from at least one of;

a first database from a regulatory agency;

a second database, the second database storing data regarding previously observed data signals;

one or more labels of the one or more electrical devices;

or

user identification of the one or more electrical devices.

14. A method of detecting and classifying electrical power usage by one or more electrical devices, the one or more electrical devices are coupled to an electrical power line, the method comprising:

capturing two or more electrical signals on the electrical power line, the two or more electrical signals comprise continuous electrical noise;

converting the continuous electrical noise in the two or more electrical signals into one or more first data signals;

wirelessly transmitting the one or more first data signals to a computational unit;

before detecting an occurrence of one or more electrical events, wirelessly receiving the one or more first data signals at the computational unit;

detecting the occurrence of the one or more electrical events on the electrical power line using at least in part the continuous electrical noise in the two or more electrical signals; and

associating the one or more electrical events with a change in an electrical state of at least one device of the one or more electrical devices,

wherein;

the continuous electrical noise in the two or more electrical signals comprises electrical signals that are identifiable on the electrical power line for a length of time greater than one second.

15. The method of claim 14, wherein:

the continuous electrical noise in the two or more electrical signals comprises high-frequency electromagnetic interference in a range of thirty kilohertz to three megahertz.

16. The method of claim 14, wherein:

associating the one or more electrical events with the change in the electrical state comprises;

associating the one or more electrical events with the change in the electrical state of the at least one device of the one or more electrical devices from one of;

a power-off state to a power-on state;

or

a power-on state to a power-off state.

17. The method of claim 14, wherein:

associating the one or more electrical events with the change in the electrical state comprises;

associating the one or more electrical events with the change in the electrical state of the at least one device of the one or more electrical devices from a first state providing a first electrical power to the at least one device of the one or more electrical devices to a second state providing a second electrical power to the at least one device of the one or more electrical devices;

the first electrical power is different from the second electrical power; and

the first electrical power and the second electrical power are not in a power-off state.

18. The method of claim 14, further comprising:

after capturing the two or more electrical signals and before detecting the occurrence of the one or more electrical events, using the continuous electrical noise in the two or more electrical signals to train a computational unit to associate the one or more electrical events with the electrical power usage by the at least one device of the one or more electrical devices.

19. The method of claim 14, further comprising:

coupling a sensing device to a wall outlet of a structure;

wherein;

the wall outlet is coupled to the electrical power line; and

capturing the two or more electrical signals comprises;

capturing the two or more electrical signals using the sensing device coupled to the wall outlet of the structure.

20. An electrical event detection device configured to detect two or more electrical events in a power line infrastructure of a structure, the electrical event detection device comprising:

a receiving module configured to receive and process one or more electrical signals, the one or more electrical signals comprise a high-frequency component, the receiving module comprising;

an electrical interface configured to couple to the power line infrastructure;

one or more filter circuits coupled to the electrical interface and configured to pass one or more portions of the one or more electrical signals; and

a converter module coupled to an output of the one or more filter circuits and configured to convert the one or more portions of the one or more electrical signals into one or more data signals, the one or more data signals comprise information regarding the high-frequency component of the one or more electrical signals; and

a processing module configured to run on a processor, the processing module comprising;

an event detection module configured to use the information regarding the high-frequency component of the one or more electrical signals to determine whether the two or more electrical events have occurred;

a classification module configured to classify the two or more electrical events; and

a training module configured to correlate a first type of event with a first event of the two or more electrical events and to correlate a second type of event with a second event of the two or more electrical events,

wherein;

the two or more electrical events comprise a turning on of one or more electrical devices coupled to the power line infrastructure of the structure and also comprise a turning off of the one or more electrical devices coupled to the power line infrastructure of the structure; and

the high-frequency component of the one or more electrical signals comprise electrical signals in a ten kilohertz to three megahertz range;

the high-frequency component of the one or more electrical signals further comprises substantially continuous electrical noise on the power line infrastructure; and

the substantially continuous electrical noise comprises (a) first electrical noise that is identifiable on the power line infrastructure for a first length of time that is greater than one alternating current electrical cycle, or (b) second electrical noise that is identifiable on the power line infrastructure for a second length of time that is less than one alternating current electrical cycle but the second electrical noise are repeated in three or more alternating current electrical cycles.

21. The electrical event detection device of claim 20, further comprising:

a hub electrically coupled to the power line infrastructure,

wherein;

the hub is configured to receive the one or more data signals from the receiving module over the power line infrastructure.

22. The electrical event detection device of claim 21, wherein:

the hub is further configured to communicate the one or more data signals to the processing module over a wireless connection.