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IMPEDANCE RESONANCE SENSOR FOR REAL TIME MONITORING OF DIFFERENT PROCESSES AND METHODS OF USING SAME

  • US 20130141117A1
  • Filed: 11/30/2012
  • Published: 06/06/2013
  • Est. Priority Date: 12/02/2011
  • Status: Active Grant
First Claim
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1. An apparatus for contactless measuring or monitoring, in-situ, in-line and/or in real time, composition and/or other electromagnetic impedance correlated properties comprising at least one of level, density, moisture, and ionization of one or more liquid and/or gaseous substances and/or one or more bulk materials, comprising:

  • at least one resonance type impedance (“

    IR”

    ) sensor which is a multicoil open-core or air-core inductor, said sensor comprising at least two coils, at least one coil of the at least two coils being at least one excitation coil connectable to at least one alternating current source with frequency sweep, at least one other coil of the at least two coils being at least one sensing coil connectable to at least one data processing system, wherein;

    (i) upon electrical connection to said current source, said at least one excitation coil is capable of propagating an energy to said at least one sensing coil, which is capable of generating a probing electromagnetic field, (ii) said at least one sensing coil is designed in such a way that intrinsic inductance L, capacitance C, and resistance R parameters of said at least one sensing coil are capable of providing resonance conditions for measuring impedance of an object under test or at least a portion of said object under test being disposed within a sensing area of said at least one sensing coil at a predetermined frequency range; and

    (iii) said at least one sensing coil uses only its intrinsic (distributed) capacitance and is not connected to any capacitance means such that said at least one sensing coil is capable of measuring at least one of conductance, conductivity and one or more dielectric properties of said object under test or at least said portion of said object under test being disposed within the sensing area of said at least one sensing coil;

    at least one power supply;

    at least one radio frequency (“

    RF”

    ) sweep generator, the at least one RF sweep generator being electrically connected to at least one said excitation coil;

    at least one data acquisition block, the at least one data acquisition block being electrically connected to;

    (i) at least one said excitation coil, (ii) at least one said sensing coil, or (iii) to both said excitation and sensing coils;

    at least one calculation block; and

    at least one communication block.

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