CA2279802A1 - Reduced cost automatic meter reading system and method using locally communicating utility meters - Google Patents
Reduced cost automatic meter reading system and method using locally communicating utility meters Download PDFInfo
- Publication number
- CA2279802A1 CA2279802A1 CA002279802A CA2279802A CA2279802A1 CA 2279802 A1 CA2279802 A1 CA 2279802A1 CA 002279802 A CA002279802 A CA 002279802A CA 2279802 A CA2279802 A CA 2279802A CA 2279802 A1 CA2279802 A1 CA 2279802A1
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- coupled
- voltage
- utility meter
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D4/00—Tariff metering apparatus
- G01D4/002—Remote reading of utility meters
- G01D4/004—Remote reading of utility meters to a fixed location
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/30—Arrangements in telecontrol or telemetry systems using a wired architecture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
- H04Q2209/43—Arrangements in telecontrol or telemetry systems using a wireless architecture using wireless personal area networks [WPAN], e.g. 802.15, 802.15.1, 802.15.4, Bluetooth or ZigBee
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/60—Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/82—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data
- H04Q2209/823—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data where the data is sent when the measured values exceed a threshold, e.g. sending an alarm
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/30—Smart metering, e.g. specially adapted for remote reading
Abstract
A low cost and easy to assemble communicating utility meter provides selectable measurement, calibration, display, and communications means so as to be re-configurable based on several factors including; harmonic content of the power signal measured, LCD
display alternatives, time of use measurements, bandpass filter settings, power quality measurements, PLC communications alternatives, radio frequency communications alternatives, optical communications alternatives, and hard wire communications alternatives.
display alternatives, time of use measurements, bandpass filter settings, power quality measurements, PLC communications alternatives, radio frequency communications alternatives, optical communications alternatives, and hard wire communications alternatives.
Claims (42)
1. An LCD driver having an inverter signal line, at least one bit line, and an LCD driver line, said LCD driver comprising:
at least one exclusive OR gate coupled to said inverter line and coupled to said at least one bit line, wherein said exclusive OR gate is adapted to generate a voltage signal in correspondence with the logical status of said inverter line and said at least one bit line;
a respective voltage level capacitor coupled to said at least one exclusive OR gate, wherein said respective voltage level capacitor has a capacitance value that is proportional to the numerical significance of said at least one bit line coupled to said at least one exclusive OR gate, and wherein said respective voltage level capacitor is adapted to generate a voltage level proportional to the respective capacitance value and the voltage signal generated by said at least one exclusive OR gate; and a summing amplifier coupled to each respective voltage level capacitor, wherein said summing amplifier is adapted to sum the voltage level across each respective voltage level capacitor so as to generate a plurality of LCD driving voltage levels.
at least one exclusive OR gate coupled to said inverter line and coupled to said at least one bit line, wherein said exclusive OR gate is adapted to generate a voltage signal in correspondence with the logical status of said inverter line and said at least one bit line;
a respective voltage level capacitor coupled to said at least one exclusive OR gate, wherein said respective voltage level capacitor has a capacitance value that is proportional to the numerical significance of said at least one bit line coupled to said at least one exclusive OR gate, and wherein said respective voltage level capacitor is adapted to generate a voltage level proportional to the respective capacitance value and the voltage signal generated by said at least one exclusive OR gate; and a summing amplifier coupled to each respective voltage level capacitor, wherein said summing amplifier is adapted to sum the voltage level across each respective voltage level capacitor so as to generate a plurality of LCD driving voltage levels.
2. The LCD driver as recited in claim 1, wherein said voltage level capacitor is adapted to generate a plurality of LCD driving voltage levels having an average voltage level of zero volts.
3. A method of responding to a reduction in power supply voltage in a communicating utility meter having non-volatile memory, said power supply having three voltage thresholds, said method comprising the steps of:
first removing power from non-critical functions when the power supply voltage is less than said first threshold;
second, saving critical values in non-volatile memory when the power supply voltage is less than said first threshold and less than said second threshold;
third, taking no action when the power supply voltage is greater than said second threshold and less than said third threshold;
fourth, restarting said communicating utility meter when the power supply voltage is greater than said third threshold.
first removing power from non-critical functions when the power supply voltage is less than said first threshold;
second, saving critical values in non-volatile memory when the power supply voltage is less than said first threshold and less than said second threshold;
third, taking no action when the power supply voltage is greater than said second threshold and less than said third threshold;
fourth, restarting said communicating utility meter when the power supply voltage is greater than said third threshold.
4. The method as recited in claim 3, wherein the value of said third threshold is greater than the value of said second threshold.
5. The method as recited in claim 4, wherein the value of said first threshold is greater than the value of said second threshold.
6. The method as recited in claim 5, where said non-critical functions comprise external communication hardware, LCD
display hardware, and external input/output.
display hardware, and external input/output.
7. The method as recited in claim 6, where said critical values comprise computer memory painters, accumulated kilowatt-hours, utility meter voltage readings, and utility meter current readings.
8. A method of responding to a reduction in power supply voltage in a communicating utility meter having non-volatile memory, said power supply having a voltage threshold, said method comprising the steps of:
removing power from non-critical functions when the power supply voltage is less than said voltage threshold for a time duration of one voltage cycle; and saving critical functions in non-volatile memory when the power supply voltage has been below said voltage threshold for four voltage cycles.
removing power from non-critical functions when the power supply voltage is less than said voltage threshold for a time duration of one voltage cycle; and saving critical functions in non-volatile memory when the power supply voltage has been below said voltage threshold for four voltage cycles.
9. A re-configurable utility meter, having a current signal and having a voltage signal, said utility meter comprising:
a current sensor;
a voltage sensor;
a DSP coupled to said current sensor and coupled to said voltage sensor, said DSP comprising;
a high pass filter, wherein said high pass filter is adapted to eliminate the DC component and noise from the current sensor signal;
a phase corrector coupled to said high pass filter, wherein said phase corrector is adapted to correct phase error in the current sensor signal;
a gain corrector coupled to said phase corrector, wherein said gain corrector is adapted to correct for gain error in the current sensor signal; and a power measurement block coupled to said DSP and coupled to said power signal, wherein said power measurement block is adapted to be re-configurable so as to compute real power, reactive power, or apparent power.
a current sensor;
a voltage sensor;
a DSP coupled to said current sensor and coupled to said voltage sensor, said DSP comprising;
a high pass filter, wherein said high pass filter is adapted to eliminate the DC component and noise from the current sensor signal;
a phase corrector coupled to said high pass filter, wherein said phase corrector is adapted to correct phase error in the current sensor signal;
a gain corrector coupled to said phase corrector, wherein said gain corrector is adapted to correct for gain error in the current sensor signal; and a power measurement block coupled to said DSP and coupled to said power signal, wherein said power measurement block is adapted to be re-configurable so as to compute real power, reactive power, or apparent power.
10. A re-configurable utility meter, having a voltage signal and having a current signal, said utility meter comprising:
a current sensor;
a voltage sensor;
a DSP coupled to said current sensor and coupled to said voltage sensor, said DSP comprising;
a high pass filter, wherein said high pass filter is adapted to eliminate the DC component and noise from the voltage sensor signal;
a phase corrector coupled to said high pass filter, wherein said phase corrector is adapted to correct phase error in the voltage sensor signal;
a gain corrector coupled to said phase corrector, wherein said gain corrector is adapted to correct for gain error in the voltage sensor signal; and a power measurement block coupled to said DSP and coupled to said power signal, wherein said power measurement block is adapted to be re-configurable so as to compute real power, reactive power, or apparent power.
a current sensor;
a voltage sensor;
a DSP coupled to said current sensor and coupled to said voltage sensor, said DSP comprising;
a high pass filter, wherein said high pass filter is adapted to eliminate the DC component and noise from the voltage sensor signal;
a phase corrector coupled to said high pass filter, wherein said phase corrector is adapted to correct phase error in the voltage sensor signal;
a gain corrector coupled to said phase corrector, wherein said gain corrector is adapted to correct for gain error in the voltage sensor signal; and a power measurement block coupled to said DSP and coupled to said power signal, wherein said power measurement block is adapted to be re-configurable so as to compute real power, reactive power, or apparent power.
11. The re-configurable utility meter as recited in claim 9, further comprising a Time of Use (TOU) function, wherein said TOU
function may be selected to generate a plurality of signals indicative of energy usage over specified units of time.
function may be selected to generate a plurality of signals indicative of energy usage over specified units of time.
12. The re-configurable utility meter as recited in claim 9, further comprising a demand function, wherein said demand function may be selected to generate a plurality of signals indicative of the rate of energy usage over specked units of time.
13. The re-configurable utility meter as recited in claim 9, further comprising an LCD display, wherein said LCD display may be selected to display power usage in two ways including the display of alpha-numeric data and binary enunciation of the rate of energy consumption.
14. The re-configurable utility meter as recited in claim 9, further comprising a calibration function, wherein said calibration function may be selected to generate at least one calibration signal.
15. The re-configurable utility meter as recited in claim 10, further comprising a Time of Use (TOU) function wherein said TOU
function may be selected to generate a plurality of signals indicative of energy usage over specified units of time.
function may be selected to generate a plurality of signals indicative of energy usage over specified units of time.
16. The re-configurable utility meter as recited in claim 10, further comprising a demand function, wherein said demand function may be selected to generate a plurality of signals indicative of the rate of energy usage over specified units of time.
17. The re-configurable utility meter as recited in claim 10, further comprising an LCD display, wherein said LCD display may be selected to display power usage in two ways including the display of alpha-numeric data and binary enunciation of the rate of energy consumption.
18. The re-configurable utility meter as recited in claim 10, further comprising a calibration function, wherein said calibration function may be selected to generate at least one calibration signal.
19. A re-configurable utility meter, having a current signal and having a voltage signal, said utility meter comprising:
a current sensor;
a voltage sensor;
a DSP coupled to said current sensor and coupled to said voltage sensor, said DSP comprising;
a current high pass filter, wherein said high pass filter is adapted to eliminate the DC component and noise from the current sensor signal;
a current phase corrector coupled to said current high pass filter, wherein said phase corrector is adapted to correct phase error in the current sensor signal;
a current gain corrector coupled to said current phase corrector, wherein said current gain corrector is adapted to correct for gain error in the current sensor signal;
a voltage high pass filter, wherein said voltage high pass filter is adapted to eliminate the DC component and noise from the voltage sensor signal;
a voltage phase corrector coupled to said voltage high pass filter, wherein said voltage phase corrector is adapted to correct phase error in the voltage sensor signal;
a voltage gain corrector coupled to said voltage phase corrector, wherein said voltage gain corrector is adapted to correct for gain error in the voltage sensor signal; and a power measurement block coupled to said DSP and coupled to said power signal, wherein said power measurement block is adapted to be re-configurable so as to compute real power, reactive power, or apparent power.
a current sensor;
a voltage sensor;
a DSP coupled to said current sensor and coupled to said voltage sensor, said DSP comprising;
a current high pass filter, wherein said high pass filter is adapted to eliminate the DC component and noise from the current sensor signal;
a current phase corrector coupled to said current high pass filter, wherein said phase corrector is adapted to correct phase error in the current sensor signal;
a current gain corrector coupled to said current phase corrector, wherein said current gain corrector is adapted to correct for gain error in the current sensor signal;
a voltage high pass filter, wherein said voltage high pass filter is adapted to eliminate the DC component and noise from the voltage sensor signal;
a voltage phase corrector coupled to said voltage high pass filter, wherein said voltage phase corrector is adapted to correct phase error in the voltage sensor signal;
a voltage gain corrector coupled to said voltage phase corrector, wherein said voltage gain corrector is adapted to correct for gain error in the voltage sensor signal; and a power measurement block coupled to said DSP and coupled to said power signal, wherein said power measurement block is adapted to be re-configurable so as to compute real power, reactive power, or apparent power.
20. The re-configurable utility meter as recited in claim 19, further comprising a Time of Use (TOU) function, wherein said TOU function may be selected to generate a plurality of signals indicative of energy usage over specified units of time.
21. The re-configurable utility meter as recited in claim 19, further comprising a demand function, wherein said demand function may be selected to generate a plurality of signals indicative of the rate of energy usage over specified units of time.
22. The re-configurable utility meter as recited in claim 19, further comprising an LCD display, wherein said LCD display may be selected to display power usage in two ways including the display of alpha-numeric data and binary enunciation of the rate of energy consumption.
23. The re-configurable utility meter as recited in claim 19, further comprising a calibration function, wherein said calibration function may be selected to generate at least one calibration signal.
24. The re-configurable utility meter as recited in claim 9, wherein said current sensor comprises a differentiating current sensor.
25. The re-configurable utility meter as recited in claim 24, wherein said DSP further comprises an integrator coupled to said high pass filter, wherein said integrator is adapted to integrate the current sensor signal.
26. The re-configurable utility meter as recited in claim 19, wherein said current sensor comprises a differentiating current sensor.
27. The re-configurable utility meter as recited in claim 26, wherein said DSP further comprises an current integrator coupled to said current high pass filter, wherein said current integrator is adapted to integrate the current sensor signal.
28. A circuit for filtering a current sensor signal comprising a second order infinite impulse response (IIR) filter, said IIR filter having a z domain response defined by:
wherein c is a normalization constant, and wherein k is approximately equal to 1, and wherein k is approximately equal to k.
wherein c is a normalization constant, and wherein k is approximately equal to 1, and wherein k is approximately equal to k.
29. The circuit as recited in claim 28, wherein said IIR
filter comprises:
a first digital summer;
a unity gain amplifier coupled to said first digital summer;
a normalization constant amplifier coupled to said unity gain amplifier;
a negative unity gain amplifier coupled to said first summer and coupled to said normalization constant amplifier;
a first unit delay coupled to said unity gain amplifier;
a second unit delay coupled to said first unit delay and coupled to said negative unity gain amplifier;
a second summer coupled to said first summer;
a third unit delay coupled to said second summer;
a fourth unit delay coupled to said third unit delay;
a 2k gain amplifier coupled to said fourth unit delay and coupled to said third unit delay;
a third summer coupled to said 2k gain ampler, and coupled to said second summer; and a ~2 gain amplifier coupled to said third summer and coupled to said fourth unit delay.
filter comprises:
a first digital summer;
a unity gain amplifier coupled to said first digital summer;
a normalization constant amplifier coupled to said unity gain amplifier;
a negative unity gain amplifier coupled to said first summer and coupled to said normalization constant amplifier;
a first unit delay coupled to said unity gain amplifier;
a second unit delay coupled to said first unit delay and coupled to said negative unity gain amplifier;
a second summer coupled to said first summer;
a third unit delay coupled to said second summer;
a fourth unit delay coupled to said third unit delay;
a 2k gain amplifier coupled to said fourth unit delay and coupled to said third unit delay;
a third summer coupled to said 2k gain ampler, and coupled to said second summer; and a ~2 gain amplifier coupled to said third summer and coupled to said fourth unit delay.
30. A method of selecting IIR filter constants k and ~
within a circuit for filtering a current sensor signal, said method comprising the steps of:
selecting a first zero at z=1;
selecting a second zero at z=-1; and selecting a pair of poles at the roots of equation 2 2 - 2k + ~2 sufficiently close to said first zero such that said pair of poles and said first zero appear as a single pole at z=1 for frequencies within a selected pass band.
within a circuit for filtering a current sensor signal, said method comprising the steps of:
selecting a first zero at z=1;
selecting a second zero at z=-1; and selecting a pair of poles at the roots of equation 2 2 - 2k + ~2 sufficiently close to said first zero such that said pair of poles and said first zero appear as a single pole at z=1 for frequencies within a selected pass band.
31. The method of selecting IIR filter constants, as recited in claim 30 wherein k is selected based on the equation k =1- 2-n, wherein n is greater than 7.
32. The method of selecting IIR filter constants, as recited in claim 31 wherein ~2 is selected based on the equation ~2=1-2-(n-1).
33. A method of calculating calibration constants used to calibrate a utility meter, said method comprising the steps of:
connecting the voltage signal of a precision voltage supply to the utility meter, connecting the current signal of a precision current supply to the utility meter;
collecting a plurality of un-calibrated voltage samples and un-calibrated current samples generated by said precision voltage supply and said precision current supply;
performing a Fourier Transform of the voltage samples and a Fourier Transform of the current samples, wherein the amplitude and phase of the respective voltage and current signals is generated;
and calculating calibration constants based on the amplitude and phase of the respective voltage and current signals.
connecting the voltage signal of a precision voltage supply to the utility meter, connecting the current signal of a precision current supply to the utility meter;
collecting a plurality of un-calibrated voltage samples and un-calibrated current samples generated by said precision voltage supply and said precision current supply;
performing a Fourier Transform of the voltage samples and a Fourier Transform of the current samples, wherein the amplitude and phase of the respective voltage and current signals is generated;
and calculating calibration constants based on the amplitude and phase of the respective voltage and current signals.
34. A utility meter having pre-selectable communication protocols selectable by the use of "soft-keys", comprising:
a CPU; and a communication hardware module coupled to said CPU
and coupled to an external device, wherein said communications hardware module is adapted to be reconfigured via software to communicate using a standard radio frequency protocol, and alternatively to communicate using a standard serial wire-line protocol, and alternatively to communicate using a standard optical protocol, and alternatively to communicate using a power line carrier protocol.
a CPU; and a communication hardware module coupled to said CPU
and coupled to an external device, wherein said communications hardware module is adapted to be reconfigured via software to communicate using a standard radio frequency protocol, and alternatively to communicate using a standard serial wire-line protocol, and alternatively to communicate using a standard optical protocol, and alternatively to communicate using a power line carrier protocol.
35. The utility meter as recited in claim 34, wherein said communication hardware module is coupled to said external device utilizing a communication link selected from the group including a optical link, a radio frequency link, and a wired communications link.
36. The utility meter as recited in claim 35, wherein said communication hardware module is adapted to select said protocol based on programming options selected via said "soft-keys."
37. A set of utility meter hardware having a base, at least one current sensor, and at least one printed wiring board (PWB), for improved assembly of a utility meter, said utility meter hardware comprising:
a sensor shield adapted to house said current sensor;
said base having a locating pin, wherein said pin is adapted to align said sensor shield to said base so as to provide registration to couple said sensor shield to said base;
at least one snap connector respectively coupled to said at least one PWB, wherein said at least one snap connector is adapted to provide a repeatable electrical connection between said at least one PWB and said at least one current sensor; and wherein said sensor shield and said base and said at least one PWB is adapted to snap together to form a utility meter housing.
a sensor shield adapted to house said current sensor;
said base having a locating pin, wherein said pin is adapted to align said sensor shield to said base so as to provide registration to couple said sensor shield to said base;
at least one snap connector respectively coupled to said at least one PWB, wherein said at least one snap connector is adapted to provide a repeatable electrical connection between said at least one PWB and said at least one current sensor; and wherein said sensor shield and said base and said at least one PWB is adapted to snap together to form a utility meter housing.
38. The set of utility meter hardware as recited in claim 37, wherein said at least one snap connector is adapted to provide symmetry between said at least one PWB and said at least one current sensor.
39. The set of utility meter hardware as recited in claim 38, further comprising at least one bus bar coupled to said base, wherein said at least one bus bar is adapted to provide repeatable electrical connection between said at least one bus bar and said base.
40. The set of utility meter hardware as recited in claim 39, wherein said at least one bus bar is coupled to said at least one PWB, wherein said at least one bus bar is adapted to provide a repeatable electrical connection between said at least one PWB and said at least one bus bar.
41. The set of utility meter hardware as recited in claim 40, wherein said sensor shield is adapted to be coupled to said current sensor by being snapped together.
42. The set of utility meter hardware as recited in claim 41, wherein said display is adapted to be coupled to one of said printed wiring boards by being snapped together, and wherein said display is adapted to be coupled to said housing by being snapped together.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002685205A CA2685205A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685207A CA2685207A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685426A CA2685426A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/134,112 | 1998-08-14 | ||
US09/134,112 US6262672B1 (en) | 1998-08-14 | 1998-08-14 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002685207A Division CA2685207A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685205A Division CA2685205A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685426A Division CA2685426A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
Publications (2)
Publication Number | Publication Date |
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CA2279802A1 true CA2279802A1 (en) | 2000-02-14 |
CA2279802C CA2279802C (en) | 2010-02-09 |
Family
ID=22461819
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2279802A Expired - Lifetime CA2279802C (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685207A Abandoned CA2685207A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685205A Abandoned CA2685205A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685426A Abandoned CA2685426A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002685207A Abandoned CA2685207A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685205A Abandoned CA2685205A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
CA002685426A Abandoned CA2685426A1 (en) | 1998-08-14 | 1999-08-06 | Reduced cost automatic meter reading system and method using locally communicating utility meters |
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US (3) | US6262672B1 (en) |
CA (4) | CA2279802C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8417471B2 (en) | 2005-11-23 | 2013-04-09 | Quadlogic Controls Corporation | Systems and methods for electricity metering |
US8452555B2 (en) | 2001-02-28 | 2013-05-28 | Quadlogic Controls Corporation | Apparatus and methods for multi-channel metering |
Families Citing this family (109)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7185131B2 (en) * | 1999-06-10 | 2007-02-27 | Amron Technologies, Inc. | Host-client utility meter systems and methods for communicating with the same |
US6535859B1 (en) * | 1999-12-03 | 2003-03-18 | Ultrawatt Energy System, Inc | System and method for monitoring lighting systems |
US6417792B1 (en) * | 2000-01-18 | 2002-07-09 | Cirrus Logic, Inc. | Single phase bi-directional electrical measurement systems and methods using ADCs |
US6873144B2 (en) * | 2000-04-07 | 2005-03-29 | Landis+Gyr Inc. | Electronic meter having random access memory with passive nonvolatility |
US6998962B2 (en) * | 2000-04-14 | 2006-02-14 | Current Technologies, Llc | Power line communication apparatus and method of using the same |
US7248158B2 (en) * | 2000-04-14 | 2007-07-24 | Current Technologies, Llc | Automated meter reading power line communication system and method |
US20020082748A1 (en) * | 2000-06-15 | 2002-06-27 | Internet Energy Systems, Inc. | Utility monitoring and control systems |
EP1371219A4 (en) * | 2001-02-14 | 2006-06-21 | Current Tech Llc | Data communication over a power line |
US6563697B1 (en) | 2001-02-23 | 2003-05-13 | Power Measurement, Ltd. | Apparatus for mounting a device on a mounting surface |
US7085824B2 (en) | 2001-02-23 | 2006-08-01 | Power Measurement Ltd. | Systems for in the field configuration of intelligent electronic devices |
US6871150B2 (en) * | 2001-02-23 | 2005-03-22 | Power Measurement Ltd. | Expandable intelligent electronic device |
US6813571B2 (en) | 2001-02-23 | 2004-11-02 | Power Measurement, Ltd. | Apparatus and method for seamlessly upgrading the firmware of an intelligent electronic device |
US7249265B2 (en) | 2001-02-23 | 2007-07-24 | Power Measurement, Ltd. | Multi-featured power meter with feature key |
US6745138B2 (en) | 2001-02-23 | 2004-06-01 | Power Measurement, Ltd. | Intelligent electronic device with assured data storage on powerdown |
US6622097B2 (en) * | 2001-06-28 | 2003-09-16 | Robert R. Hunter | Method and apparatus for reading and controlling electric power consumption |
US7039532B2 (en) * | 2001-06-28 | 2006-05-02 | Hunter Robert R | Method and apparatus for reading and controlling utility consumption |
US6714881B2 (en) * | 2001-08-14 | 2004-03-30 | Square D Company | Time reference compensation for improved metering accuracy |
DE10207228A1 (en) * | 2002-02-21 | 2003-09-04 | Bosch Gmbh Robert | Method for calibrating a sensor and circuit arrangement for operating a sensor |
US6801865B2 (en) * | 2002-03-21 | 2004-10-05 | Engage Networks, Inc. | Meter monitoring and tamper protection system and method |
US7256709B2 (en) * | 2002-04-01 | 2007-08-14 | Electro Industries/Gauge Tech | Meter with IrDA port |
CN1647571A (en) * | 2002-04-19 | 2005-07-27 | 皇家飞利浦电子股份有限公司 | Context-aware device |
KR100445226B1 (en) * | 2002-07-24 | 2004-08-21 | 한국전력공사 | System for remotely reading an meter using data structure grouped |
US6888607B2 (en) * | 2002-08-29 | 2005-05-03 | Motorola, Inc. | Rewritable sign system |
US7224272B2 (en) * | 2002-12-10 | 2007-05-29 | Current Technologies, Llc | Power line repeater system and method |
US7436321B2 (en) * | 2002-12-10 | 2008-10-14 | Current Technologies, Llc | Power line communication system with automated meter reading |
US7336200B2 (en) * | 2003-09-05 | 2008-02-26 | Itron, Inc. | Data communication protocol in an automatic meter reading system |
US7346483B2 (en) * | 2003-10-10 | 2008-03-18 | Synopsys, Inc. | Dynamic FIFO for simulation |
US7338259B2 (en) * | 2004-03-02 | 2008-03-04 | United Technologies Corporation | High modulus metallic component for high vibratory operation |
US20060028197A1 (en) * | 2004-08-05 | 2006-02-09 | Microchip Technology Incorporated | Direct current offset cancellation and phase equalization for power metering devices |
US7305310B2 (en) | 2004-10-18 | 2007-12-04 | Electro Industries/Gauge Tech. | System and method for compensating for potential and current transformers in energy meters |
US7304586B2 (en) | 2004-10-20 | 2007-12-04 | Electro Industries / Gauge Tech | On-line web accessed energy meter |
US7508190B2 (en) | 2004-10-20 | 2009-03-24 | Electro Industries/Gauge Tech. | Test pulses for enabling revenue testable panel meters |
US9080894B2 (en) | 2004-10-20 | 2015-07-14 | Electro Industries/Gauge Tech | Intelligent electronic device for receiving and sending data at high speeds over a network |
US7079962B2 (en) * | 2004-10-20 | 2006-07-18 | Itron, Inc. | Automated utility meter reading system with variable bandwidth receiver |
US7747733B2 (en) | 2004-10-25 | 2010-06-29 | Electro Industries/Gauge Tech | Power meter having multiple ethernet ports |
KR100665268B1 (en) * | 2004-10-29 | 2007-01-04 | 한국전력공사 | Electronic watt meter with the intelligent agent |
WO2006052524A1 (en) * | 2004-11-01 | 2006-05-18 | Centerpoint Energy, Inc. | Current sensing bar |
AU2005306167B8 (en) * | 2004-11-18 | 2010-11-18 | Powersense A/S | Compensation of simple fiberoptic faraday effect sensors |
US7271996B2 (en) | 2004-12-03 | 2007-09-18 | Electro Industries/Gauge Tech | Current inputs interface for an electrical device |
US7761249B2 (en) * | 2005-01-14 | 2010-07-20 | Landis+Gyr, Inc. | Utility meter having RF protection |
US8160824B2 (en) | 2005-01-27 | 2012-04-17 | Electro Industries/Gauge Tech | Intelligent electronic device with enhanced power quality monitoring and communication capabilities |
US8620608B2 (en) | 2005-01-27 | 2013-12-31 | Electro Industries/Gauge Tech | Intelligent electronic device and method thereof |
US8190381B2 (en) | 2005-01-27 | 2012-05-29 | Electro Industries/Gauge Tech | Intelligent electronic device with enhanced power quality monitoring and communications capabilities |
US7996171B2 (en) | 2005-01-27 | 2011-08-09 | Electro Industries/Gauge Tech | Intelligent electronic device with broad-range high accuracy |
US20060267574A1 (en) * | 2005-04-26 | 2006-11-30 | Howard John E | Method for providing comprehensive electrical usage and demand data |
US7627453B2 (en) | 2005-04-26 | 2009-12-01 | Current Communications Services, Llc | Power distribution network performance data presentation system and method |
US20070007942A1 (en) * | 2005-07-08 | 2007-01-11 | Microchip Technology Incorporated | Automatic non-linear phase response calibration and compensation for a power measurement device |
US7769149B2 (en) * | 2006-01-09 | 2010-08-03 | Current Communications Services, Llc | Automated utility data services system and method |
US20080012724A1 (en) * | 2006-01-30 | 2008-01-17 | Corcoran Kevin F | Power line communications module and method |
US20070188985A1 (en) * | 2006-01-31 | 2007-08-16 | Wallace Bennett D Jr | Disconnect collar for power line carrier metering transponder |
CA2535848A1 (en) * | 2006-02-10 | 2007-08-10 | Roger Morrison | Electrical profile monitoring system for detection of utilities theft |
JP4807131B2 (en) * | 2006-04-05 | 2011-11-02 | 株式会社ニコン | Imaging device and imaging apparatus |
WO2007118128A2 (en) * | 2006-04-07 | 2007-10-18 | I-Conserve, Llc | Artificial-intelligence-based energy auditing, monitoring and control |
US8093745B2 (en) * | 2006-07-07 | 2012-01-10 | Ambient Corporation | Sensing current flowing through a power line |
US20080052019A1 (en) * | 2006-08-25 | 2008-02-28 | Brennan W J | Compact Data Transmission Protocol for Electric Utility Meters |
CN101675344A (en) * | 2006-11-30 | 2010-03-17 | 北方传感器公司 | Sensor assembly and method for measuring strokes of lightning |
WO2008086231A2 (en) * | 2007-01-04 | 2008-07-17 | Itron, Inc. | Utility data collection and reconfigurations in a utility metering system |
US8587949B2 (en) | 2007-03-27 | 2013-11-19 | Electro Industries/Gauge Tech | Electronic meter having user-interface and central processing functionality on a single printed circuit board |
US7973673B2 (en) * | 2007-04-02 | 2011-07-05 | Itron, Inc. | Automated meter reader direct mount endpoint module |
US11307227B2 (en) | 2007-04-03 | 2022-04-19 | Electro Industries/Gauge Tech | High speed digital transient waveform detection system and method for use in an intelligent electronic device |
US10845399B2 (en) | 2007-04-03 | 2020-11-24 | Electro Industries/Gaugetech | System and method for performing data transfers in an intelligent electronic device |
US20130275066A1 (en) | 2007-04-03 | 2013-10-17 | Electro Industries/Gaugetech | Digital power metering system |
US9989618B2 (en) | 2007-04-03 | 2018-06-05 | Electro Industries/Gaugetech | Intelligent electronic device with constant calibration capabilities for high accuracy measurements |
GB2453325A (en) * | 2007-10-01 | 2009-04-08 | Npower | Monitoring utility consumption |
US20090125351A1 (en) * | 2007-11-08 | 2009-05-14 | Davis Jr Robert G | System and Method for Establishing Communications with an Electronic Meter |
US20100026517A1 (en) * | 2008-01-04 | 2010-02-04 | Itron, Inc. | Utility data collection and reconfigurations in a utility metering system |
US7889094B2 (en) * | 2008-06-13 | 2011-02-15 | Silver Spring Networks, Inc. | Utility network interface device with visual indication of network connectivity |
US9542658B2 (en) * | 2008-11-06 | 2017-01-10 | Silver Spring Networks, Inc. | System and method for identifying power usage issues |
DE102009012648A1 (en) * | 2009-03-11 | 2010-09-16 | Siemens Aktiengesellschaft | Device, especially power quality meter and power quality device |
US20100262395A1 (en) * | 2009-04-08 | 2010-10-14 | Manu Sharma | System and Method for Determining a Phase Conductor Supplying Power to a Device |
US20100262393A1 (en) * | 2009-04-08 | 2010-10-14 | Manu Sharma | System and Method for Determining a Phase Conductor Supplying Power to a Device |
EP2246967A1 (en) * | 2009-04-30 | 2010-11-03 | SMA Solar Technology AG | Inverter with built in utility meter |
US20100283453A1 (en) * | 2009-05-05 | 2010-11-11 | POWRtec | Methods for Calibrating an Electric Meter |
US8478550B2 (en) | 2010-07-23 | 2013-07-02 | Caterpillar Inc. | Generator set calibration controller |
US8942942B2 (en) | 2010-07-23 | 2015-01-27 | Caterpillar Inc. | Generator set calibration controller |
US8274232B2 (en) | 2010-08-03 | 2012-09-25 | General Electric Company | Lighting system communications apparatus and method |
US9213050B2 (en) * | 2010-08-30 | 2015-12-15 | Sharp Laboratories Of America, Inc. | Delayed meter reporting |
US8864514B2 (en) | 2010-10-07 | 2014-10-21 | General Electric Company | Controller device |
US8398435B2 (en) | 2011-05-05 | 2013-03-19 | General Electric Company | Receptacle connector between controller and lighting fixture |
US8587223B2 (en) | 2010-10-19 | 2013-11-19 | General Electric Company | Power line communication method and apparatus for lighting control |
US9906029B2 (en) * | 2010-12-16 | 2018-02-27 | Lennox Industries Inc. | Priority-based energy management |
US8564280B2 (en) * | 2011-01-31 | 2013-10-22 | Elster Solutions, Llc | Mechanical packaging and method for a single current sensor integrated into an electricity meter with a disconnect switch |
US9454203B2 (en) * | 2011-05-04 | 2016-09-27 | Texas Instruments Incorporated | Method, system and computer program product for reducing consumption of battery power |
WO2013136295A1 (en) | 2012-03-15 | 2013-09-19 | Northstar Telemetrics, S. L. | Method for automatically reading a utility meter, retrofittable meter reader and automatic meter reading system using the same |
US8319509B1 (en) | 2012-04-30 | 2012-11-27 | Atmel Corporation | Testing circuit for an analog to digital converter |
US9383222B2 (en) * | 2012-06-29 | 2016-07-05 | General Electric Company | Methods and systems for prevention of data corruption |
US9625559B2 (en) * | 2012-10-08 | 2017-04-18 | General Electric Company | Correcting accumulated power in utility meters |
US9488676B2 (en) * | 2014-04-10 | 2016-11-08 | Ford Global Technologies, Llc | Sensor shield for an electric vehicle |
US9927257B2 (en) * | 2014-10-16 | 2018-03-27 | Sensus Spectrum, Llc | Method, apparatus, and system for initializing a meter reading device |
US9389665B1 (en) * | 2015-06-19 | 2016-07-12 | Rockwell Collins, Inc. | Power warning monitor system and method |
EP3136610B1 (en) * | 2015-08-27 | 2018-06-06 | Kabushiki Kaisha Toshiba | Electronic apparatus and method |
US10371739B2 (en) | 2015-10-30 | 2019-08-06 | Landis+Gyr Llc | Arrangement for detecting a meter maintenance condition using winding resistance |
WO2017152316A1 (en) * | 2016-03-05 | 2017-09-14 | 马骏 | Power measurement device employing power carrier technology |
CN106772188B (en) * | 2016-11-17 | 2021-01-22 | 中国电力科学研究院 | Mutual inductor operation characteristic evaluation method based on environmental influence factors and assessment platform |
US10908198B2 (en) | 2017-08-07 | 2021-02-02 | Landis+Gyr Innovations, Inc. | Determining meter phase using interval voltage measurements |
US11183878B2 (en) | 2017-08-07 | 2021-11-23 | Landis+Gyr Innovations, Inc. | Maintaining connectivity information for meters and transformers located in a power distribution network |
US10393791B2 (en) | 2017-09-28 | 2019-08-27 | Landis+Gyr Llc | Detection of deteriorated electrical connections in a meter using temperature sensing and time-variable thresholds |
US10690519B2 (en) | 2018-02-23 | 2020-06-23 | Landis+Gyr Innovations, Inc. | Meter reading sensor using TMR and hall effect sensors |
US10712386B2 (en) * | 2018-05-10 | 2020-07-14 | Landis+Gyr Llc | Device and method for data preservation and power loss recovery in an electric meter |
US11536754B2 (en) | 2019-08-15 | 2022-12-27 | Landis+Gyr Innovations, Inc. | Electricity meter with fault tolerant power supply |
US11226357B2 (en) | 2019-09-27 | 2022-01-18 | Landis+Gyr Innovations, Inc. | Electrical arc detection for electric meter socket connections |
US11245260B2 (en) | 2020-02-25 | 2022-02-08 | Landis+Gyr Innovations, Inc. | Automatic discovery of electrical supply network topology and phase |
US11429401B2 (en) | 2020-03-04 | 2022-08-30 | Landis+Gyr Innovations, Inc. | Navigating a user interface of a utility meter with touch-based interactions |
US11646602B2 (en) | 2020-03-11 | 2023-05-09 | Landis+Gyr Innovations, Inc. | Topology and phase detection for electrical supply network |
US11536745B2 (en) | 2020-03-18 | 2022-12-27 | Landis+Gyr Innovations, Inc. | Electric meter installation issue detection based on orientation change |
US11385074B2 (en) | 2020-03-18 | 2022-07-12 | Landis+Gyr Innovations, Inc. | Programming electric meter global positioning system coordinates using smart device |
US11359934B2 (en) | 2020-03-24 | 2022-06-14 | Landis+Gyr Innovations, Inc. | Variable rate monitoring in flow-based metering systems |
US11515725B2 (en) | 2020-09-21 | 2022-11-29 | Landis+Gyr Innovations, Inc. | Autonomous topology validation for electrical supply network |
CN114325089B (en) * | 2021-12-27 | 2024-03-19 | 杭州万高科技股份有限公司 | Single-phase electric energy metering chip and intelligent thing allies oneself with table based on IR46 standard |
Family Cites Families (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1634098A (en) * | 1926-04-15 | 1927-06-28 | Frederic W Erickson | Electric meter and the mounting thereof |
US2105396A (en) * | 1935-05-09 | 1938-01-11 | Gen Electric | Electric meter mounting |
US2880380A (en) * | 1955-11-23 | 1959-03-31 | Gen Electric | Meter mounting |
US3369088A (en) * | 1966-07-27 | 1968-02-13 | Murray Mfg Corp | Electric meter by-pass arrangement |
US3702460A (en) | 1971-11-30 | 1972-11-07 | John B Blose | Communications system for electric power utility |
CH559916A5 (en) * | 1973-06-21 | 1975-03-14 | Hug Interlizenz Ag | |
US3997840A (en) * | 1973-08-24 | 1976-12-14 | Weston Instruments, Inc. | Panel meter with adapter cover |
US4080570A (en) * | 1974-12-12 | 1978-03-21 | Sangamo Weston, Inc. | Panel mounting for electrical device |
US3967264A (en) | 1975-01-31 | 1976-06-29 | Westinghouse Electric Corporation | Distribution network power line communication system including addressable interrogation and response repeater |
US4302750A (en) | 1979-08-03 | 1981-11-24 | Compuguard Corporation | Distribution automation system |
US4326261A (en) * | 1980-06-23 | 1982-04-20 | Peoples John T | Single tone detector |
CA1151242A (en) | 1980-09-17 | 1983-08-02 | Saskatchewan Power Corporation | Method and apparatus for sensing current in high voltage conductors |
US4408186A (en) | 1981-02-04 | 1983-10-04 | General Electric Co. | Power line communication over ground and neutral conductors of plural residential branch circuits |
US4414676A (en) * | 1981-03-31 | 1983-11-08 | Motorola, Inc. | Signal synchronization system |
US4673872A (en) * | 1984-10-11 | 1987-06-16 | General Electric Company | Packaging for electronic demand register |
US4786903A (en) | 1986-04-15 | 1988-11-22 | E. F. Johnson Company | Remotely interrogated transponder |
US4783623A (en) * | 1986-08-29 | 1988-11-08 | Domestic Automation Company | Device for use with a utility meter for recording time of energy use |
US4792946A (en) | 1987-04-07 | 1988-12-20 | Spectrum Electronics, Inc. | Wireless local area network for use in neighborhoods |
FR2620580A1 (en) * | 1987-09-14 | 1989-03-17 | Deshais Sa Ets | Supply box for electric metering |
US5010568A (en) | 1989-04-04 | 1991-04-23 | Sparton Corporation | Remote meter reading method and apparatus |
US5559377A (en) | 1989-04-28 | 1996-09-24 | Abraham; Charles | Transformer coupler for communication over various lines |
US5243338A (en) | 1990-05-25 | 1993-09-07 | Schlumberger Industries, Inc. | Two and three wire utility data communications system |
US5155481A (en) | 1990-05-25 | 1992-10-13 | Schlumberger Industries, Inc. | Two and three wire utility data communications system |
US5229713A (en) * | 1991-04-25 | 1993-07-20 | General Electric Company | Method for determining electrical energy consumption |
WO1992021194A1 (en) | 1991-05-10 | 1992-11-26 | Echelon Corporation | Power line communication while avoiding determinable interference harmonics |
US5301121A (en) * | 1991-07-11 | 1994-04-05 | General Electric Company | Measuring electrical parameters of power line operation, using a digital computer |
GB2259779B (en) * | 1991-09-19 | 1996-04-03 | Ampy Automation Digilog | Improved power meter |
MX9206230A (en) * | 1992-02-21 | 1993-09-01 | Abb Power T & D Co | IMPROVEMENTS IN AN ELECTRICAL ACTIVITY METER AND METHODS FOR THE USE OF THE SAME. |
US5473638A (en) * | 1993-01-06 | 1995-12-05 | Glenayre Electronics, Inc. | Digital signal processor delay equalization for use in a paging system |
US5696501A (en) * | 1994-08-02 | 1997-12-09 | General Electric Company | Method and apparatus for performing the register functions for a plurality of metering devices at a common node |
US5473504A (en) * | 1994-12-27 | 1995-12-05 | General Electric Company | Electric meter with desired seating torque |
US5594331A (en) | 1995-06-07 | 1997-01-14 | Regents Of The University Of California | Microelectromechanical powerline monitoring apparatus |
US5774328A (en) * | 1996-04-15 | 1998-06-30 | General Electric Company | Register enclosure for use with a utility meter |
US5994892A (en) * | 1996-07-31 | 1999-11-30 | Sacramento Municipal Utility District | Integrated circuit design automatic utility meter: apparatus & method |
US5995911A (en) * | 1997-02-12 | 1999-11-30 | Power Measurement Ltd. | Digital sensor apparatus and system for protection, control, and management of electricity distribution systems |
US6219417B1 (en) * | 1997-06-06 | 2001-04-17 | Advanced Micro Devices, Inc. | Ring trip detection in a communication system |
US5926544A (en) * | 1997-06-06 | 1999-07-20 | Advanced Micro Devices, Inc. | Direct current feed with line status change adaptation in a communication system |
US5982611A (en) * | 1997-12-09 | 1999-11-09 | Eaton Corporation | Meter center with fastenerless current carrying connections |
US5966010A (en) * | 1998-02-09 | 1999-10-12 | Abb Power T&D Company Inc. | Electrical energy meter with snap fit interlocking parts |
US6414605B1 (en) * | 1998-09-02 | 2002-07-02 | Schlumberger Resource Management Services, Inc. | Utility meter pit lid mounted antenna assembly and method |
-
1998
- 1998-08-14 US US09/134,112 patent/US6262672B1/en not_active Expired - Fee Related
-
1999
- 1999-08-06 CA CA2279802A patent/CA2279802C/en not_active Expired - Lifetime
- 1999-08-06 CA CA002685207A patent/CA2685207A1/en not_active Abandoned
- 1999-08-06 CA CA002685205A patent/CA2685205A1/en not_active Abandoned
- 1999-08-06 CA CA002685426A patent/CA2685426A1/en not_active Abandoned
-
2001
- 2001-04-05 US US09/826,792 patent/US6816360B2/en not_active Expired - Lifetime
-
2004
- 2004-08-06 US US10/913,100 patent/US7548223B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8452555B2 (en) | 2001-02-28 | 2013-05-28 | Quadlogic Controls Corporation | Apparatus and methods for multi-channel metering |
US8417471B2 (en) | 2005-11-23 | 2013-04-09 | Quadlogic Controls Corporation | Systems and methods for electricity metering |
Also Published As
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CA2685205A1 (en) | 2000-02-14 |
US20050024234A1 (en) | 2005-02-03 |
CA2685207A1 (en) | 2000-02-14 |
CA2685426A1 (en) | 2000-02-14 |
US20010019321A1 (en) | 2001-09-06 |
US6262672B1 (en) | 2001-07-17 |
CA2279802C (en) | 2010-02-09 |
US6816360B2 (en) | 2004-11-09 |
US7548223B2 (en) | 2009-06-16 |
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