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Reduced cost automatic meter reading system and method using locally communicating utility meters

  • US 6,262,672 B1
  • Filed: 08/14/1998
  • Issued: 07/17/2001
  • Est. Priority Date: 08/14/1998
  • Status: Expired due to Fees
First Claim
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1. 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 programmable by soft keys for selection of functions, said DSP comprising;

    a high pass filter for filtering 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 re-configurable power measurement block for computing real power, reactive power, or apparent power, based on said soft key selection.

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