Watthour meter and optical pickup test device and method

• US 6,686,731 B2
• Filed: 08/19/2002
• Issued: 02/03/2004
• Est. Priority Date: 08/22/2001
• Status: Active Grant

• Current Assignee: Avo Multi-AMP Corporation (Thyssen Bornemisza Family)
• Original Assignee: Avo Multi-AMP Corporation (Thyssen Bornemisza Family)
• Inventors: Tacconi, Eugenio J.
• Primary Examiner(s): Cuneo, Kamand
• Assistant Examiner(s): TANG, MINH NHUT
• Application Number:
  US10/223,337
• Publication Number:
  US 20030038621A1
• Time in Patent Office: 533 Days
• Field of Search: 324/74, 324/118, 324/103.R, 324/141-142, 324/158.1, 340/870.02, 340/870.03, 340/870.06, 340/870.07, 340/870.11, 340/870.18, 340/870.29, 340/545.3
• US Class Current: 324/142
• CPC Class Codes: G01R 35/04 of instruments for measuring time integral of power or current
• CPC Class Codes: G01R 35/06 by stroboscopic methods

Abstract

A watthour meter testing device for testing watthour meters is provided that includes a measuring device, a switch, a transmitter and a receiver. The measuring device is in communication with the power measured by the watthour meter. The switch is operable to test electromechanical watthour meters in a first position and operable to test electronic watthour meters in a second position. The transmitter is operative to transmit a light signal to a consumption indicator on the watthour meter when the switch is in the first position for testing electromechanical watthour meter. The receiver is operative to detect the light signal transmitted from the transmitter and reflected from the consumption indicator on the watthour meter when the switch is in a first position. The receiver is further operative to detect a consumption light signal emanating from the electronic watthour meters when the switch is in a second position.

Claims

1. A watthour meter test device for testing electromechanical and electronic watthour meters comprising;

a housing having a socket adapted to receive a watthour meter;

a current generator in communication with the socket to communicate a current to the watthour meter;

a voltage generator in communication with the socket to communicate a voltage to the watthour meter;

a measurement device coupled to determine the current and the voltage communicated to the watthour meter;

an optical pickup positioned to detect a consumption indicator on the watthour meter, the optical pickup comprising;

a transmitter positioned to transmit a light signal to the watthour meter,

a receiver positioned to detect light adjacent the watthour meter; and

a switch coupled to the optical pickup, the switch having a first position to activate the transmitter to transmit the light signal to the consumption indicator of the watthour meter and to activate the receiver to detect the light signal reflected from the consumption indicator of electromechanical watthour meters, the switch further having a second position to activate the receiver to detect a consumption signal from a consumption indicator of electronic watthour meters.

2. The watthour meter test device of claim 1, further comprising:

a current communication line connected at a first end to the current generator and at a second end to the socket; and

a voltage communication line connected at a first end to the voltage generator and at a second end to the socket.

3. The watthour meter test device of claim 2, wherein the measuring device is in communication with the current communication line and the voltage communication line.

4. The watthour meter test device of claim 1, wherein the optical pickup includes a housing coupled to the housing of the watthour meter test device, the housing of the optical pickup having an outer surface defining an inner retaining space.

5. The watthour meter test device of claim 4, wherein at least a portion of the transmitter and at least a portion of the receiver are disposed within the inner retaining space of the housing of the optical pickup.

6. The watthour meter test device of claim 4, wherein the housing of the optical pickup includes a first end provided with a lens to focus the light signal generated by the transmitter to the consumption indicator of the watthour meter.

7. The watthour meter test device of claim 4, wherein the housing of the optical pickup includes a first end provided with a lens to focus the light adjacent the watthour meter onto the receiver.

8. The watthour meter test device of claim 1, further provided with a processing component coupled to compare the voltage and current measured by the measurement device with the consumption indicator detected by the optical pickup.

9. A watthour meter test device for testing watthour meters comprising;

a phantom load in communication with the watthour meter to communicate a load to the watthour meter;

a measurement device in communication with the phantom load to determine the load communicated to the watthour meter;

an optical pickup coupled to detect a consumption indicator on the watthour meter, the optical pickup comprising;

a transmitter positioned to transmit a light signal to the watthour meter,

a receiver positioned to detect light adjacent the watthour meter; and

a switch coupled to the optical pickup, the switch having a first position to activate the transmitter to transmit the light signal to the consumption indicator of the watthour meter and to activate the receiver to detect the light signal reflected from the consumption indicator of electromechanical watthour meters, the switch further having a second position to activate the receiver to detect a consumption signal from a consumption indicator of electronic watthour meters.

10. The watthour meter test device of claim 9, further provided with a processing component coupled to compare the voltage and current measured by the measurement device with the consumption indicator detected by the optical pickup.

11. An optical pickup device for detecting a consumption indicator on a watthour meter comprising;

a light source to generate a light signal;

a modulator operably coupled to the light source such that the light source produces the light signal having a frequency;

a light detector positioned to receive a consumption light from the consumption indicator on the watthour meter, the light detector operative to generate a consumption signal indicative of receiving the consumption light from consumption indicator;

an ambient light filter operably coupled to the light detector, the ambient light filter adapted to eliminate an ambient light portion of the consumption signal generated by the light detector;

an amplifier to receive the consumption signal from the ambient light filter, the amplifier adapted to amplify the consumption signal having the ambient light portion eliminated by the ambient light filter; and

an indicator operably coupled to receive the amplified consumption signal and to generate an indication perceivable to a user relative to the electrical consumption measured by the watthour meter.

12. The optical pickup device of claim 11, further comprising:

a transmission line having a first end and a second end, the first end of the transmission line positioned adjacent the light source to communicate the light signal from the first end to the second end of the transmission line and to the consumption indicator on the watthour meter; and

a reception line having a first end and a second end, the first end of the reception line positioned adjacent the consumption indicator on the watthour meter to receive the consumption light and communicate the consumption light to the second end of the reception line disposed adjacent the light detector.

13. The optical pickup of claim 11, wherein the light detector is further defined as a wide spectrum light detector.

14. The optical pickup of claim 11, wherein the light detector is further defined as a wide spectrum light photo device.

15. The optical pickup of claim 11, further comprising a modulation detector operably coupled to receive the consumption signal from the ambient light filter, the modulation detector detecting a portion of the consumption signal having the frequency of the light signal generated by the light source and modulated by the modulator.

16. The optical pickup of claim 15, wherein the modulation detector eliminates a portion of the consumption signal other than the portion of the consumption signal having the frequency of the light signal generated by the light source and modulated by the modulator.

17. The optical pickup of claim 12, further comprising:

a housing retaining a lens for directing the light signal toward the consumption indicator and for directing the ambient light toward light detector; and

a swivel arm having a first portion pivotally coupled to a second portion, the first portion coupled to the housing and the second portion positioned adjacent a socket for receiving the watthour meter.

18. A method for detecting a consumption indicator on electromechanical and electronic watthour meters comprising;

providing an optical pickup having a switch provided with a first position and a second position;

switching to the second position of the switch to detect the consumption indicator on electronic meters;

detecting a consumption light adjacent the consumption indicator of the watthour meter;

generating a consumption signal relative to the consumption light, the consumption signal having an ambient light portion;

filtering the ambient light portion of the consumption signal;

amplifying the consumption signal;

generating an indication perceivable to a user relative to the electrical consumption indicated by the consumption indicator and detected by the optical pickup;

switching to the first position of the switch to detect the consumption indicator on electromechanical meters;

generating a light signal; and

transmitting the light signal onto the consumption indicator.

19. The method of claim 18, further including modulating the light signal at a frequency.

20. The method of claim 19, further including detecting a portion of the consumption signal modulated at the frequency of the light signal.

21. The method of claim 20, wherein detecting the modulated portion of the light signal is in response to switching the switch to the first position.

22. An optical pickup for detecting a consumption indicator on a watthour meter comprising;

a light source to generate a light signal;

a modulator in communication with the light source such that the light source produces the light signal having a frequency;

a light detection device positioned to receive light adjacent the watthour meter to generate a consumption signal;

an ambient light filter in communication with the light detection device, the ambient light filter to eliminate an ambient light portion of the consumption signal and generate a filtered signal;

a first portion in communication with the ambient light filter and adapted to modify the filtered signal, the first portion having a modulation detector to detect a portion of the filtered signal having the frequency of the light signal generated by the light source;

a second portion in communication the ambient light filter;

a switch having a first position to communicate with the first portion, the switch having a second position to communicate with the second portion;

an amplifier in communication with the switch, the amplifier to receive the filter signal and generate an amplified signal; and

an indicator in communication with the amplifier and adapted to receive the amplified signal and to generate an indication perceptible to an operator of the optical pickup, the amplified signal relative to the electrical consumption indicated by the consumption indicator.

23. The optical pickup of claim 22, wherein the modulation detector includes a bandpass filter in communication with the ambient light filter to receive the filtered signal therefrom and filter a frequency portion of the filtered signal other than the frequency of the light signal generated by the light source.

24. The optical pickup of claim 22, wherein the modulation detector includes a rectifier in communication with the bandpass filter, the rectifier adapted to receive the filtered signal from the bandpass filter and generate the filtered signal having a full wave.

25. The optical pickup of claim 23, wherein the modulation detector includes a rectifier in communication with the bandpass filter, the rectifier to receive the filtered signal from the bandpass filter and generate the filtered signal having a full wave.

26. A watthour meter testing device for testing electromechanical and electronic watthour meters having a consumption indicator on the watthour meter, the watthour meter testing device comprising;

a measuring device in communication with an electrical supply communicated to the watthour meter;

a switch operable to test electromechanical watthour meters in a first position and operable to test electronic watthour meters in a second position;

a transmitter to transmit a light signal to the consumption indicator when the switch is in at least the first position for testing electromechanical watthour meter; and

a receiver to detect light adjacent the watthour meter, the receiver provided with a filter operative to filter ambient light and operative to detect the light signal transmitted from the transmitter and reflected from the consumption indicator on the watthour meter when the switch is in the first position and further operative to detect a consumption light signal emanating from the electronic watthour meters when the switch is in the second position.

27. The watthour meter testing device of claim 26, further comprising a housing having a socket to receive the watthour meter.

28. A watthour meter testing device of claim 27, further comprising:

a current generator in communication with the socket to communicate a current to the watthour meter; and

a voltage generator in communication with the socket to communicate a voltage to the watthour meter.

29. A watthour meter testing device of claim 27, further comprising a phantom load in communication with the watthour meter.

30. A watthour meter testing device of claim 26, further comprising:

a current generator in communication with the socket and adapted to communicate a current to the watthour meter; and

a voltage generator in communication with the socket and adapted to communicate a voltage to the watthour meter.

31. An optical pickup for detecting a consumption indicator on electromechanical and electronic watthour meters, the optical pickup comprising;

a switch operable to test electromechanical watthour meters in a first position and operable to test electronic watthour meters in a second position;

a means for transmitting a light signal to the consumption indicator when the switch is in at least the first position for testing electromechanical watthour meter; and

a means for detecting light adjacent the watthour meter, the detector means provided with a means for filtering ambient light to detect the light signal transmitted from the transmitter means and reflected from the consumption indicator when the switch is in the first position, the detecting means further to detect a consumption light signal emanating from the electronic watthour meters when the switch is in the second position.

32. The optical pickup of claim 31, further includes a housing having an outer surface defining an inner retaining space and wherein transmitter means and detecting means are disposed at least partially within the inner retaining space of the housing of the optical pickup.

33. The optical pickup of claim 32, wherein the housing of the optical pickup includes a first end provided with a lens to concentrate the light signal generated by the transmitter means to the consumption indicator of the watthour meter.

34. The optical pickup of claim 32, wherein the housing of the optical pickup includes a first end provided with a lens to concentrate the light adjacent the watthour meter to the detecting means.

35. The optical pickup of claim 32, wherein the transmitter means is further provided with a light emitting portion for transmitting the light signal.

36. The optical pickup of claim 35, wherein the transmitter means is further provided a fiber optic line and a collimated lens, such that the collimated lens collimates the light emitted from the light emitting portion onto the fiber optic line.

37. The optical pickup of claim 31, wherein the transmitter means includes a means for generating a modulated light signal at a specific frequency.

38. The optical pickup of claim 37, wherein the receiver means includes a means for detecting the light signal modulated at the frequency of the light signal transmitted by the transmitter means.

39. The optical pickup of claim 38, wherein the transmitting means is active in the switch first position and wherein the transmitting means is inactive in the switch second position.