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Variable frequency magnetic flowmeter

  • US 20130006544A1
  • Filed: 06/28/2011
  • Published: 01/03/2013
  • Est. Priority Date: 06/28/2011
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a pipe section for process flow;

    a coil for generating a magnetic field across the pipe section;

    a current source for energizing the coil to generate the magnetic field, wherein the current source energizes the coil at a plurality of different pulse frequencies;

    an electrode for sensing an electromotive force induced across the process flow by the magnetic field; and

    a processor for calculating a function of the electromotive force at the plurality of different pulse frequencies, and for generating a flow output based on the function.

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