Electromagnetic impedance spectroscopy apparatus and related planar sensor system

    公开(公告)号:US11680920B2

    公开(公告)日:2023-06-20

    申请号:US17669687

    申请日:2022-02-11

    IPC分类号: G01N27/02 G01N27/22

    CPC分类号: G01N27/026 G01N27/226

    摘要: According to various implementations, an apparatus for electromagnetic impedance spectrographic characterization of a material under test (MUT) includes: a planar array of at least two electrodes configured to be placed in electromagnetic communication with the MUT, wherein during operation of the planar array, at least one of the electrodes comprises a transmitting electrode for transmitting an electromagnetic signal over a range of frequencies through the MUT to at least one receiving electrode in the planar array; and a backer ground plate at least partially surrounding the at least two electrodes, the backer ground plate being electrically grounded and insulated from the at least two electrodes, wherein the backer ground plate extends from a plane formed by the at least two electrodes and separates the at least two electrodes to create an electrically isolated volume proximate to the at least two electrodes.

    Methods, circuits and systems for obtaining impedance or dielectric measurements of a material, under test

    公开(公告)号:US11604155B2

    公开(公告)日:2023-03-14

    申请号:US17739255

    申请日:2022-05-09

    IPC分类号: G01N27/02

    摘要: Certain disclosed methods include: transmitting an excitation signal into the MUT and transmitting a reference signal to a set of magnitude and phase (M/P) detectors; receiving the response signal; separately comparing a magnitude and phase for each of the excitation signal and the reference signal with corresponding detection ranges for a first one of the M/P detectors; separately comparing a magnitude and phase for each of the response signal and the reference signal with corresponding detection ranges for a second one of the M/P detectors; iteratively adjusting the excitation signal until the response signal has both a magnitude and a phase within the corresponding detection ranges for the second M/P detector; and iteratively adjusting the reference signal until the reference signal has both a magnitude and a phase within the corresponding detection ranges for the first and the second M/P detectors.

    PARALLEL PLATE CAPACITOR SYSTEM FOR DETERMINING IMPEDANCE CHARACTERISTICS OF MATERIAL UNDER TEST (MUT)

    公开(公告)号:US20210255161A1

    公开(公告)日:2021-08-19

    申请号:US17307114

    申请日:2021-05-04

    摘要: Various aspects of the disclosure relate to evaluating the electromagnetic impedance characteristics of a material under test (MUT) over a range of frequencies. In particular aspects, a system includes: an electrically non-conducting container sized to hold the MUT, the electrically non-conducting container having a first opening at a first end thereof and a second opening at a second, opposite end thereof; a transmitting electrode assembly at the first end of the electrically non-conducting container, the transmitting electrode assembly having a transmitting electrode with a transmitting surface; and a receiving electrode assembly at the second end of the electrically non-conducting container, the receiving electrode assembly having a receiving electrode with a receiving surface, wherein the receiving electrode is approximately parallel with the transmitting electrode, and wherein the transmitting surface of the transmitting electrode is larger than the receiving surface of the receiving electrode.

    IN-PROCESS PARALLEL PLATE SENSOR SYSTEM FOR ELECTROMAGNETIC IMPEDANCE SPECTROSCOPY MONITORING OF FLUIDS

    公开(公告)号:US20220214293A1

    公开(公告)日:2022-07-07

    申请号:US17613242

    申请日:2020-05-20

    IPC分类号: G01N27/02 G01N27/22

    摘要: Various aspects relate to characterizing features of a fluid, for example, during a manufacturing process. In particular aspects, a parallel plate sensor system is disclosed that applies an electromagnetic field over a range of frequencies to a fluid as it flows through a piping system. The system is configured to perform in-process characterization of physical attributes of the fluid as it passes through the piping system. In some cases, the system includes: a transmitting electrode assembly having: a transmitting electrode having a transmitting surface; and a transmitting electrode backer ground plate at least partially surrounding the transmitting electrode; a receiving electrode assembly comprising: a receiving electrode having receiving surface, wherein the receiving surface is smaller than the transmitting surface; and a receiving electrode backer ground plate at least partially surrounding the receiving electrode; and a fluid channel between the transmitting electrode assembly and the receiving electrode assembly, the fluid channel permitting transverse flow

    PARALLEL PLATE CAPACITOR SYSTEM FOR DETERMINING IMPEDANCE CHARACTERISTICS OF MATERIAL UNDER TEST (MUT)

    公开(公告)号:US20210055280A1

    公开(公告)日:2021-02-25

    申请号:US16640157

    申请日:2019-04-23

    IPC分类号: G01N33/24 G01N27/22 G01N33/38

    摘要: Various aspects of the disclosure relate to evaluating the electromagnetic impedance characteristics of a material under test (MUT) over a range of frequencies. In particular aspects, a system includes: an electrically non-conducting container sized to hold the MUT, the electrically non-conducting container having a first opening at a first end thereof and a second opening at a second, opposite end thereof; a transmitting electrode assembly at the first end of the electrically non-conducting container, the transmitting electrode assembly having a transmitting electrode with a transmitting surface; and a receiving electrode assembly at the second end of the electrically non-conducting container, the receiving electrode assembly having a receiving electrode with a receiving surface, wherein the receiving electrode is approximately parallel with the transmitting electrode, and wherein the transmitting surface of the transmitting electrode is larger than the receiving surface of the receiving electrode.

    METHODS, CIRCUITS AND SYSTEMS FOR OBTAINING IMPEDANCE OR DIELECTRIC MEASUREMENTS OF A MATERIAL UNDER TEST

    公开(公告)号:US20240272105A1

    公开(公告)日:2024-08-15

    申请号:US18644290

    申请日:2024-04-24

    IPC分类号: G01N27/02

    CPC分类号: G01N27/028

    摘要: Certain disclosed methods include: transmitting an excitation signal into the MUT and transmitting a reference signal to a set of magnitude and phase (M/P) detectors; receiving the response signal; separately comparing a magnitude and phase for each of the excitation signal and the reference signal with corresponding detection ranges for a first one of the M/P detectors; separately comparing a magnitude and phase for each of the response signal and the reference signal with corresponding detection ranges for a second one of the M/P detectors; iteratively adjusting the excitation signal until the response signal has both a magnitude and a phase within the corresponding detection ranges for the second M/P detector; and iteratively adjusting the reference signal until the reference signal has both a magnitude and a phase within the corresponding detection ranges for the first and the second M/P detectors.

    ELECTROMAGNETIC IMPEDANCE SPECTROSCOPY APPARATUS AND RELATED PLANAR SENSOR SYSTEM

    公开(公告)号:US20220163469A1

    公开(公告)日:2022-05-26

    申请号:US17669687

    申请日:2022-02-11

    IPC分类号: G01N27/02 G01N27/22

    摘要: According to various implementations, an apparatus for electromagnetic impedance spectrographic characterization of a material under test (MUT) includes: a planar array of at least two electrodes configured to be placed in electromagnetic communication with the MUT, wherein during operation of the planar array, at least one of the electrodes comprises a transmitting electrode for transmitting an electromagnetic signal over a range of frequencies through the MUT to at least one receiving electrode in the planar array; and a backer ground plate at least partially surrounding the at least two electrodes, the backer ground plate being electrically grounded and insulated from the at least two electrodes, wherein the backer ground plate extends from a plane formed by the at least two electrodes and separates the at least two electrodes to create an electrically isolated volume proximate to the at least two electrodes.

    SENSOR SYSTEM TO APPLY ELECTROMAGNETIC FIELDS FOR ELECTROMAGNETIC IMPEDANCE SPECTROSCOPY IN-PROCESS MONITORING OF FLUIDS

    公开(公告)号:US20210356409A1

    公开(公告)日:2021-11-18

    申请号:US17320586

    申请日:2021-05-14

    IPC分类号: G01N22/00

    摘要: Various implementations include systems and approaches for measuring an electromagnetic impedance characteristic of a fluid under test (FUT) in a fluid channel. In some cases, a system includes: a transmitting electrode assembly including: a transmitting electrode having a transmitting surface; and a transmitting electrode backer ground plate at least partially surrounding the transmitting electrode; a receiving electrode assembly including: a receiving electrode having a receiving surface; and a receiving electrode backer ground plate at least partially surrounding the receiving electrode, where the transmitting electrode and the receiving electrode are located in a set of walls defining the fluid channel, the transmitting surface and the receiving surface each conform to a shape of the set of walls defining the fluid channel, where the fluid channel permits transverse flow of the FUT relative to both the transmitting electrode and the receiving electrode.

    ELECTROMAGNETIC IMPEDANCE SPECTROSCOPY APPARATUS AND RELATED PLANAR SENSOR SYSTEM

    公开(公告)号:US20230273137A1

    公开(公告)日:2023-08-31

    申请号:US18143643

    申请日:2023-05-05

    IPC分类号: G01N27/02 G01N27/22

    CPC分类号: G01N27/026 G01N27/226

    摘要: According to various implementations, an apparatus for electromagnetic impedance spectrographic characterization of a material under test (MUT) includes: a planar array of at least two electrodes configured to be placed in electromagnetic communication with the MUT, wherein during operation of the planar array, at least one of the electrodes comprises a transmitting electrode for transmitting an electromagnetic signal over a range of frequencies through the MUT to at least one receiving electrode in the planar array; and a backer ground plate at least partially surrounding the at least two electrodes, the backer ground plate being electrically grounded and insulated from the at least two electrodes, wherein the backer ground plate extends from a plane formed by the at least two electrodes and separates the at least two electrodes to create an electrically isolated volume proximate to the at least two electrodes.