Device and method for processing and measuring properties of a moving rod of material
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United States of America Patent
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Dec 16, 2014
Grant Date -
Mar 29, 2012
app pub date -
Sep 23, 2011
filing date -
Sep 28, 2010
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Abstract
Device for processing and measuring properties of a moving rod of material of the tobacco processing industry includes a microwave resonator structured and arranged so that the rod of material is conveyable through the microwave resonator. Includes microwave generator with output frequency f0, and frequency stabilized oscillator to generate intermediate frequency fIM that is less than f0. Single sideband modulator supplies microwave resonator with a sideband signal having a sideband frequency shifted with respect to output frequency f0 by intermediate frequency fIM, and at least one analysis arrangement includes single sideband demodulator, low-pass filter, and analog to digital converter arranged in series. Single sideband demodulator receives a measurement signal of the sideband frequency transmitted or reflected from the microwave resonator, and receives output frequency f0. Low-pass filter passes an output signal of single sideband demodulator with intermediate frequency fIM, and filters out higher frequency signal portions.
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