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TARGET SENSOR

  • US 20130076373A1
  • Filed: 09/28/2012
  • Published: 03/28/2013
  • Est. Priority Date: 09/28/2011
  • Status: Active Grant
First Claim
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1. A target sensor comprising:

  • a sensor probe having a resonance frequency that changes as the separation of the sensor probe and a target changes;

    an oscillator arranged to apply a radio frequency (RF) signal to the sensor probe, the oscillator having;

    control circuitry configured to regulate the frequency of the RF signal applied to the sensor probe to below the resonance frequency of the sensor probe; and

    a detector arranged to detect an electrical characteristic of the oscillator that varies with the impedance of the sensor probe indicating an interaction of the sensor probe with the target.

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