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Electromagnetic sensor direct communication algorithm to a digital microprocessor

  • US 7,298,967 B2
  • Filed: 04/21/2005
  • Issued: 11/20/2007
  • Est. Priority Date: 04/21/2005
  • Status: Expired due to Fees
First Claim
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1. A method of interfacing an electromagnetic sensor with a controller in a control system comprising:

  • applying an excitation signal to the electromagnetic sensor;

    receiving a first electromagnetic sensor output signal based on said excitation signal, said first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor;

    receiving a second electromagnetic sensor output signal based on said excitation signal, said second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to said position of said rotor of the electromagnetic sensor;

    sampling said first electromagnetic sensor signal and said second electromagnetic sensor signal at about an instance synchronous with said excitation signal to demodulate said first electromagnetic sensor signal and said second electromagnetic sensor signal; and

    decoding a resultant of said sampling to identify said position of a rotor of the electromagnetic sensor.

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