Systems and methods for electricity metering
First Claim
1. A system comprising:
- a master data clock source comprising a master data clock;
one or more transponders, each comprising a corresponding local data clock; and
a plurality of remote power line transceivers;
wherein said plurality of remote power line transceivers are connected to a common alternating current power distribution grid;
wherein each of said plurality of remote power line transceivers has a location and is operable to monitor a voltage waveform of a power line prevailing at said location;
whereby said system is operable to generate a local data clock from each of said local power line waveforms, said local data clock having a frequency of p/q times the frequency of said voltage waveform, where p and q are integers greater than or equal to 1;
wherein said master data clock source is operable to transmit information regarding phase and frequency of said master data clock to said one or more transponders;
wherein each of said one or more transponders is operable to reconstruct said master data clock from the phase and frequency information received from said master data clock source and said transponder'"'"'s own local data clock and utilize the reconstructed master data clock to align data bits injected onto said transponder'"'"'s location on said power line;
wherein each of said remote power line transceivers is operable to receive signals said one or more transponders and measure difference in phase of the local data clock and the master clock by monitoring the signals transmitted from any one or more of the transponders; and
wherein said transponders and said remote power line transceivers are each operable to inject and receive signals on the power line.
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Accused Products
Abstract
In one aspect, the invention comprises a system comprising: a master data clock source; one or more transponders; and a plurality of remote power line transceivers; wherein all of said plurality of transceivers are connected to a common alternating current power distribution grid; and wherein each of said plurality of transceivers has a location is operable to monitor a voltage waveform of a power line prevailing at said location. In another aspect, the invention comprises a system comprising: transponders and remote power line transceivers each connected to a common alternating current power distribution grid each operable to monitor the voltage waveform of the power line prevailing at its own location, and generate selectable frequencies from said local power line waveform of a frequency of p/q times the frequency of said power line where p and q are positive integers greater than or equal to 1.
11 Citations
10 Claims
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1. A system comprising:
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a master data clock source comprising a master data clock; one or more transponders, each comprising a corresponding local data clock; and a plurality of remote power line transceivers; wherein said plurality of remote power line transceivers are connected to a common alternating current power distribution grid; wherein each of said plurality of remote power line transceivers has a location and is operable to monitor a voltage waveform of a power line prevailing at said location; whereby said system is operable to generate a local data clock from each of said local power line waveforms, said local data clock having a frequency of p/q times the frequency of said voltage waveform, where p and q are integers greater than or equal to 1; wherein said master data clock source is operable to transmit information regarding phase and frequency of said master data clock to said one or more transponders; wherein each of said one or more transponders is operable to reconstruct said master data clock from the phase and frequency information received from said master data clock source and said transponder'"'"'s own local data clock and utilize the reconstructed master data clock to align data bits injected onto said transponder'"'"'s location on said power line; wherein each of said remote power line transceivers is operable to receive signals said one or more transponders and measure difference in phase of the local data clock and the master clock by monitoring the signals transmitted from any one or more of the transponders; and wherein said transponders and said remote power line transceivers are each operable to inject and receive signals on the power line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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one or more transponders, each comprising a local data clock; and a plurality of remote power line transceivers; wherein each of said plurality of remote power line transceivers is connected to a common alternating current power distribution grid; wherein each of said plurality of remote power line transceivers has a location and is operable to monitor a voltage waveform of a power line prevailing at said location; wherein each of said plurality of remote power line transceivers is operable to generate from said local power line waveform a frequency of p/q times the frequency of said power line waveform, where p and q are positive integers greater than or equal to 1; wherein each of said one or more transponders and said plurality of remote power line transceivers is operable to inject and receive signals on a power line, said signals each having a frequency of p/q times line frequency, where p and q are selectable integers; and wherein said transponders and said remote power line transceivers alternate among different frequencies by changing p or inverting a phase of a fixed frequency so as to effect Frequency Shift Keying (FSK) or Phase Shift Keying (PSK) modulation. - View Dependent Claims (9, 10)
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Specification