Pulsed radar level detection system using pulse dithering to eliminate inaccuracies caused by tank rattle
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United States of America Patent
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Feb 15, 2011
Grant Date -
Aug 12, 2010
app pub date -
Feb 11, 2009
filing date -
Feb 11, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A through air level measurement instrument for use in minimizing tank rattle comprises a housing and an antenna secured to the housing. A process adaptor is 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. A control in the housing generates and receives a high frequency signal using an electromagnetic radiating element proximate the antenna. The control comprises an equivalent time sampling circuit including a main oscillator driving a timing circuit controlling timing between transmitted and sample pulses. A noise generator is operatively associated with the main oscillator to randomly modulate timing of the main oscillator. The control minimizes inaccuracies caused by tank rattle.
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