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

• US 9,666,058 B2
• Filed: 08/18/2015
• Issued: 05/30/2017
• 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, Polyzois, Christos Alkiviadis, Paragano, Vincent, Schultz, Leonard Joshua
• Primary Examiner(s): Hunnings, Travis
• Application Number:
  US14/829,156
• Publication Number:
  US 20150356855A1
• Time in Patent Office: 651 Days
• CPC Class Codes: G01C 7/04 involving a vehicle which moves along the profile to be traced
• 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 19/155 Indicating the presence of voltage
• CPC Class Codes: G01R 29/0814 Field measurements related to measuring influence on or from apparatus, components or humans EMC, EMI and similar testing in general G01R31/001, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
• CPC Class Codes: G01R 29/12 Measuring electrostatic fields or voltage-potential
• CPC Class Codes: G08B 21/182 Level alarms, e.g. alarms responsive to variables exceeding a threshold

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 identifying a hazardously energized object, the mobile apparatus comprising:

one or more sensor probes that detect an electric field and provide an analog signal corresponding to the electric field;

a signal converter for generating a digital signal from the analog signal;

a signal processor to process the digital signal at the fundamental frequency pertaining to the hazardously energized object and to provide a second signal representing a magnitude of the electric field at the fundamental frequency;

one or more audio devices configured to emit a continuous audio tone with variable pitch commensurate with a rise, peak and fall of the magnitude of the electric field when the mobile apparatus moves past the hazardously energized object at street level; and

a display configured to display at least one of the analog signal or the second signal corresponding to the electric field, wherein at least a plot of the electric field over time is displayed.

2. The apparatus of claim 1, wherein parameters of the mobile apparatus are variable to account for background noise in the electric field and false alarms.

3. The apparatus of claim 1, wherein the signal converter is an analog to digital converter that digitizes the analog signal to provide a transformation of the analog signal, the transformation comprising a plurality of time domain samples, each sample representing an amplitude of the electric field.

4. The apparatus of claim 3, further comprising:

a signal processor that filters the plurality of time domain samples according to a desired frequency pertaining to the hazardously energized object and to provide a second signal representing a magnitude of the electric field at the desired frequency; and

wherein the apparatus further comprises a computer to receive the second signal and to provide an indication of the magnitude of the electric field at the desired frequency.

5. The apparatus of claim 4, wherein the plurality of time domain samples are subject, by the signal processor, to a filter to yield a frequency domain representation of the plurality of time domain samples.

6. The apparatus of claim 5, wherein the signal processor applies the filter on most recent digitized signals at a rate sufficient to produce the continuous audio tone with a pitch proportional to strength of the electric field.

7. The apparatus of claim 6, wherein the signal processor produces the continuous audio tone proportional to strength of the electric field.

8. The apparatus of claim 7, wherein the signal processor converts the plurality of time domain samples to a logarithmic scale.

9. The apparatus of claim 1, further comprising:

a support frame for mounting the one or more sensor probes to the motor vehicle.

10. The apparatus of claim 1, further comprising:

a computer, coupled to the one or more audio devices, that displays a graphical representation corresponding to the rise, peak and fall of the digital signal.

11. The apparatus of claim 10, further comprising:

a computer for capturing the rise, peak and fall to gather additional information to review a potentially hazardous object.

12. A method for detecting a hazardously energized object using a mobile apparatus, the method comprising:

moving the mobile apparatus;

detecting an electric field proximate the mobile apparatus using one or more sensor probes of the mobile apparatus that generate an analog signal corresponding to the electric field;

converting the analog signal into a digital signal;

processing the digital signal at the fundamental frequency pertaining to the hazardously energized object and providing a second signal representing a magnitude of the electric field at the fundamental frequency; and

emitting a continuous audio tone with a variable pitch commensurate with a rise, peak and fall of the second signal when the mobile apparatus moves past a hazardously energized object at street level,

displaying at least one of the analog signal or the second signal corresponding to the electric field, wherein at least a plot of the electric field over time is displayed.

13. The method of claim 12, further comprising:

adjusting parameters of the mobile apparatus according to background noise in the electric field and false alarms.

14. The method of claim 12, further comprising:

transforming the digital signal into a plurality of time domain samples, each sample representing magnitude of the electric field.

15. The method of claim 14, further comprising:

filtering the plurality of time domain samples according to a desired frequency pertaining to the hazardously energized object; and

receiving the second signal and providing an indication of the magnitude of the electric field at the desired frequency.

16. The method of claim 15 applying a filter to the plurality of time domain samples to yield a frequency domain representation of the plurality of time domain samples.

17. The method of claim 16 further comprising applying the filter on most recent digitized signals at a rate sufficient to produce the continuous audio tone proportional to strength of the electric field.

18. The method of claim 17, further comprising producing a continuous audio tone proportional to strength of the electric field.

19. The method of claim 18, further comprising converting the plurality of time domain samples to a logarithmic scale.

20. The method of claim 12, further comprising mounting the one or more sensor probes to the mobile apparatus via a support frame.