Apparatus and method for monitoring and controlling detection of stray voltage anomalies

• US 8,598,864 B2
• Filed: 01/21/2009
• Issued: 12/03/2013
• Est. Priority Date: 12/23/2004
• Status: Active Grant

• Current Assignee: Osmose Utilities Services Incorporated (Osmose Holdings Incorporated)
• Original Assignee: Power Survey LLC
• Inventors: Kalokitis, David, Schultz, Leonard Joshua, Polyzois, Christos Alkiviadis, Paragano, Vincent
• Primary Examiner(s): Baldridge, Benjamin M
• Application Number:
  US12/321,484
• Publication Number:
  US 20090195255A1
• Time in Patent Office: 1,777 Days
• Field of Search: 324/72, 324/522, 324/457
• US Class Current: 324/72
• CPC Class Codes: G01R 29/0871 Complete apparatus or systems; circuits, e.g. receivers or amplifiers G01R29/0878, G01R29/0892 take precedence; dosimeters, warning devices G01R29/0857
• CPC Class Codes: G01R 29/0878 Sensors; antennas; probes; detectors wave guide measuring sections G01R1/24
• CPC Class Codes: G01R 29/14 Measuring field distribution
• CPC Class Codes: G01R 31/085 in power transmission or distribution lines, e.g. overhead

Abstract

Apparatus and methods for detecting stray voltage anomalies in electric fields are provided herein. In some embodiments, an apparatus for detecting an electrical field may comprise: at least one sensor probe for generating data corresponding to an electrical field detected by the at least one sensor probe, wherein the at least one sensor probe comprises at least one electrode; a processor, coupled to the at least one sensor probe, for analyzing the data to identify a voltage anomaly in the electric field; and an indicator, coupled to the processor, for alerting a user to a presence of the voltage anomaly in the electric field.

Claims

1. A mobile apparatus mounted to a motor vehicle for detecting an electric field, comprising:

at least one sensor probe, mounted to the motor vehicle, that generates a signal corresponding to an electric field detected by the at least one sensor probe, and wherein the at least one sensor probe comprises at least one electrode;

a processor, coupled to the at least one sensor probe, that digitizes the signal to form electric field data represented as a plurality of time domain samples, produces field strengths of each of the at least one sensor probes using the plurality of time domain samples, and analyzes the field strengths to identify a voltage anomaly in the electric field, wherein the electric field data is analyzed based on an expected frequency pertaining to the voltage anomaly to locate an energized object proximate a street; and

an indicator, coupled to the processor, that alerts a user to a presence of the voltage anomaly in the electric field proximate the street.

2. The apparatus of claim 1, further comprising at least one analog to digital converter respectively coupled to each of the at least one electrodes for digitizing electrical signals received from the at least one electrode representative of the electric field detected.

3. The apparatus of claim 1, further comprising:

at least one measuring device coupled to the vehicle that determines at least one of the location of the apparatus, a distance traveled by the apparatus, or a speed at which the apparatus is moving.

4. The apparatus of claim 1, wherein the indicator is at least one of an audio or visual indicator.

5. The apparatus of claim 4, further comprising:

transforming the plurality of time domain samples into at least one frequency domain sample to produce the electric field strengths using a Fast Fourier Transform.

6. The apparatus of claim 1, further comprising at least one camera for collecting video images of a patrolled area.

7. The apparatus of claim 1, further comprising a wireless transceiver for transmitting and receiving data to and from at least one remote device.

8. The apparatus of claim 1, further comprising a computer having a graphical user interface for displaying an electric field signal strength data, and analyzing and capturing a monitored event within the depicted electric field signal strength data.

9. The apparatus of claim 8, further comprising:

at least one camera, coupled to the computer, for collecting video images of a patrolled area, wherein the collected video images are displayed on the graphical user interface along with a graphical display of electric field signal strength.

10. The apparatus of claim 9, wherein the graphical display of data further comprises:

a raw electric field measurement plot;

an adaptive threshold plot; and

a processed electric field measurement plot.

11. The apparatus of claim 10, wherein the adaptive threshold plot is set relative to a local ambient or background noise level that is generated from data gathered prior to measurement of raw electric field data.

12. The apparatus of claim 10, wherein the graphical display of data further comprises:

an indicator to alert a user to the presence of a voltage anomaly in the electric field, wherein the voltage anomaly in the electric field is present when the processed electric field measurement plot exceeds the adaptive threshold plot.

13. A mobile apparatus mounted to a motor vehicle for detecting an electric field in a patrolled area, comprising:

at least one sensor probe, mounted to the motor vehicle, that generates a signal corresponding to an electric field detected by the at least one sensor probe, wherein the at least one sensor probe comprises at least one electrode;

at least one amplifier having an input coupled to each of the at least one electrode for adjusting a sensitivity of the sensor probe;

a processor, coupled to the at least one sensor probe, that digitizes the signal to form electric field data represented as a plurality of time domain samples, produces field strengths of each of the at least one sensor probes using the plurality of time domain samples, and analyzes the field strengths to identify a voltage anomaly in the electric field, wherein the electric field data is analyzed based on an expected frequency pertaining to the voltage anomaly to locate an energized object proximate a street;

at least one image recording device, coupled to the processor, for collecting video images of a patrolled area;

at least one measuring device for determining the location of the apparatus;

an indicator, coupled to the processor, for alerting a user to a presence of the voltage anomaly; and

a wireless transceiver component for transmitting and receiving data associated with the voltage anomaly to and from at least one remote device.

14. A method for detecting an electric field, comprising:

a) sensing an electric field using at least one sensor probe mounted to a motor vehicle, wherein the at least one sensor probe is mounted to the motor vehicle via a non-electrically interfering support frame and comprises at least one electrode;

b) identifying a location of the sensor probe;

c) digitizing electrical signals representative of the electric fields sensed by the sensor probe to create data representing the electric fields; and

d) collecting data representing the electric field sensed by the at least one sensor probe;

e) processing the collected data, wherein the digitized electrical signals within the collected data are averaged commensurate with a speed at which the sensor probe is moving, wherein the electric field data is analyzed based on an expected frequency pertaining to the voltage anomaly to locate an energized object proximate the street;

f) analyzing the collected data to identify a voltage anomaly in the electric field; and

g) providing an indicator to alert a user to a presence of the voltage anomaly in the electric field.

15. The method of claim 14, wherein the indicator is at least one of an audio or visual indicator.

16. The method of claim 14, wherein processing the digitized electrical signals comprises using a Fast Fourier Transform at a rate that is a multiple of an expected frequency of the electric field.

17. The method of claim 16, wherein processing the digitized electrical signals further comprises averaging the Fast Fourier Transformed digitized electrical signals at a rate that is representative of the speed at which the at least one sensor probe is moving.

18. The method of claim 16, wherein processing the digitized electrical signals further comprises comparing the averaged Fast Fourier Transformed digitized electrical signals to a threshold value for providing an indication of the voltage anomaly in the electric field.

19. The method of claim 14, further comprising:

(h) storing at least one of the data corresponding to the electric field detected by the at least one sensor probe, data corresponding to the location of the sensor probe, or data corresponding to the speed of which the sensor probe is moving to a storage device.