Method and system to detect actuation of a switch using vibrations or vibration signatures

• US 8,924,168 B2
• Filed: 01/27/2011
• Issued: 12/30/2014
• Est. Priority Date: 01/27/2011
• Status: Active Grant

• Current Assignee: Aclara Meters LLC (Hubbell, Inc.)
• Original Assignee: General Electric Company
• Inventors: Manoosingh, Lane Leslie, LaFrance, Ryan Marc
• Primary Examiner(s): Breene, John
• Assistant Examiner(s): Perez Bermudez, Yaritza H
• Application Number:
  US13/014,742
• Publication Number:
  US 20120197556A1
• Time in Patent Office: 1,433 Days
• Field of Search: 702/54, 702/56, 736/49
• US Class Current: 702/56
• CPC Class Codes: H01H 9/16 Indicators for switching condition, e.g. "on" or "off"
• CPC Class Codes: H01H 9/167 Circuits for remote indication
• CPC Class Codes: H01H 9/168 making use of an electromagnetic wave communication

Abstract

Described herein are embodiments of methods and systems to detect actuation of a switch using vibrations and vibration signatures. One aspect of the method comprises sending an actuation signal to a switch, receiving a vibration signal associated with the switch, and determining from the vibration signal whether the actuation occurred.

Claims

1. A method, comprising:

sending an actuation command via a computing device to a switch associated with a utility service meter;

receiving a vibration signal associated with the switch via the computing device after sending the actuation command, wherein the vibration signal is representative of a switch actuation event; and

determining from the vibration signal via the computing device whether the actuation occurred, comprising;

verifying whether the switch actuation event corresponds to the actuation command by comparing the vibration signal to one or more known switch actuation signatures associated with the actuation command.

2. The method of claim 1, wherein the utility service meter is one of an electric meter, a gas meter or a water meter.

3. The method of claim 1, wherein sending an actuation command to the switch comprises sending one of an open or a close signal to the switch.

4. The method of claim 1, wherein receiving a vibration signal associated with the switch comprises receiving the vibration signal from an accelerometer associated with the switch.

5. The method of claim 4, wherein the accelerometer is a MEMS accelerometer.

6. The method of claim 4, wherein receiving a vibration signal associated with the switch comprises receiving the vibration signal when vibrations associated with the switch have an amplitude that meets or exceeds a threshold or met or exceed a specified time duration.

7. The method of claim 1, wherein determining from the vibration signal whether the actuation occurred comprises analyzing the vibration signal using time-domain analysis to determine whether the actuation occurred.

8. The method of claim 7, wherein analyzing the vibration signal using time-domain analysis to determine whether the actuation occurred further comprises filtering the vibration signal prior to analyzing the vibration signal using time-domain analysis.

9. The method of claim 7, wherein analyzing the vibration signal using time-domain analysis comprises using one of cross-correlation or circular cross-correlation to compare the vibration signal with known switch actuation signatures.

10. The method of claim 1, wherein determining from the vibration signal whether the actuation occurred comprises analyzing the vibration signal using frequency-domain analysis to determine whether the actuation occurred.

11. The method of claim 10, wherein analyzing the vibration signal using frequency-domain analysis to determine whether the actuation occurred further comprises filtering the vibration signal prior to analyzing the vibration signal using frequency-domain analysis.

12. A system, comprising:

a meter, wherein said meter is associated with a switch configured to be actuated remotely via an actuation command; and

an accelerometer operatively coupled to the meter and configured to detect vibration signals, wherein the vibration signals are detected after the meter receives the actuation command; and

verification hardware configured to determine whether an actuation of the switch occurred based at least on a comparison of the vibration signals to one or more known switch actuation signatures associated with the actuation command.

13. The system of claim 12, further comprising a transmitter and a computing device, wherein the transmitter is used to transmit the vibration signal to the computing device and the computing device is used to compare the vibration signal with known switch actuation signatures to determine whether actuation of the switch occurred.

14. The system of claim 13, wherein the computing device is configure to actuate the switch remotely by sending one of an open or a close signal to the meter and the meter sends the signal to the switch.

15. The system of claim 14, wherein the computing device configured to receive a vibration signal associated with the switch comprises the computing device configured to receive the vibration signal when vibrations associated with the switch have an amplitude that meets or exceeds a threshold or met or exceed a specified time duration.

16. The system of claim 12, wherein the accelerometer is a MEMS accelerometer.

17. The system of claim 12, wherein the meter is one of an electric meter, a gas meter or a water meter.

18. The system of claim 12, wherein the vibration signal is analyzed using frequency-domain analysis to determine whether the actuation occurred.

19. The system of claim 18, wherein the system further comprises a filter and analyzing the vibration signal using frequency-domain analysis to determine whether the actuation occurred further comprises filtering the vibration signal using the filter prior to analyzing the vibration signal using frequency-domain analysis.

20. The system of claim 12, wherein the vibration signal is analyzed using time-domain analysis to determine whether the actuation occurred.

21. The system of claim 20, wherein the system further comprises a filter and analyzing the vibration signal using time-domain analysis to determine whether the actuation occurred further comprises filtering the vibration signal using the filter prior to analyzing the vibration signal using time-domain analysis.

22. The system of claim 20, wherein analyzing the vibration signal using time-domain analysis comprises using one of cross-correlation or circular cross-correlation to compare the vibration signal with known switch actuation signatures.

23. A system, comprising:

a non-transitory computer readable medium storing computer executable instructions which, when executed by a computer, perform a process comprising;

sending an actuation command to remotely actuate a switch;

determining one or more switch actuation signatures associated with the actuation command;

receiving a vibration signal produced by an accelerometer in proximity to the switch, wherein the vibration signal is associated with the actuation of the switch; and

verifying based at least on a comparison of the vibration signal and the one or more switch actuation signatures associated with the actuation command whether the actuation occurred.

24. The system of claim 23, wherein the accelerometer is a MEMS accelerometer.

25. The system of claim 23, wherein the meter is one of an electric meter, a gas meter or a water meter.

26. The system of claim 23, wherein sending an actuation command to remotely actuate a switch comprises sending one of an open or a close signal to the switch.

27. The system of claim 23, wherein verifying based at least on the vibration signal and the one or more switch actuation signatures whether the actuation occurred comprises analyzing the vibration signal using time-domain analysis to determine whether the actuation occurred.

28. The system of claim 27, wherein the system further comprises a filter and analyzing the vibration signal using time-domain analysis to verify whether the actuation occurred further comprises filtering the vibration signal using the filter prior to analyzing the vibration signal using time-domain analysis.

29. The system of claim 27, wherein analyzing the vibration signal using time-domain analysis comprises using one of cross-correlation or circular cross-correlation to compare the vibration signal with the one or more switch actuation signatures.

30. The system of claim 23, wherein verifying based at least on the vibration signal and the one or more switch actuation signatures whether the actuation occurred comprises analyzing the vibration signal using frequency-domain analysis to determine whether the actuation occurred.

31. The system of claim 30, wherein the system further comprises a filter and analyzing the vibration signal using frequency-domain analysis to verify whether the actuation occurred further comprises filtering the vibration signal using the filter prior to analyzing the vibration signal using frequency-domain analysis.