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Pulsed radar level detection system using pulse dithering to eliminate inaccuracies caused by tank rattle

  • US 7,889,120 B2
  • Filed: 02/11/2009
  • Issued: 02/15/2011
  • Est. Priority Date: 02/11/2009
  • Status: Active Grant
First Claim
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1. A through air radar level measurement instrument for use in minimizing tank rattle comprising:

  • a housing;

    an antenna secured to the housing;

    a process adapter associated with the antenna and the housing for securing the instrument to a closed tank with the antenna directed into an interior of the closed tank; and

    a control in the housing for generating or receiving a high frequency signal using an electromagnetic radiating element proximate the antenna, the control comprising an equivalent time sampling circuit including a main oscillator driving a timing circuit controlling timing between transmitted and sampled pulses, and a noise generator operatively associated with the main oscillator to randomly modulate timing of the main oscillator, wherein the control minimizes inaccuracies caused by tank rattle.

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