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公开(公告)号：US20170350873A1
公开(公告)日：2017-12-07
申请号：US15678095
申请日：2017-08-15
IPC分类号： G01N33/483 , A61B5/053
CPC分类号： G01N33/483 , A61B5/053 , A61B5/0531
摘要： A multi-frequency inductive sensing system can be used for spectrographic material analysis of a conductive target material (such as tissue) based on electrical impedance spectroscopy. An inductive senor can be driven with an excitation current at multiple sensor excitation frequencies (ω) to project a time-varying magnetic field into a sensing area on the surface of the target material, inducing eddy currents within the target material. The inductive sensor can be characterized by a sensor impedance Z(ω) as a function of the sensor excitation frequency (ω), and the resulting induced eddy currents. Multiple sensor impedance Zs(ω) measurements, at the multiple sensor excitation frequencies (ω), can be determined, which represent electromagnetic properties of the target material (such as permittivity ε, permeability μ, and resistivity ρ), based on the induced eddy currents. The multiple sensor excitation frequencies (ω), and corresponding multiple sensor impedance Zs(ω) measurements, can be selected for particular target penetration depths.
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2.发明申请公开(公告)号：US20170292981A1
公开(公告)日：2017-10-12
申请号：US15486292
申请日：2017-04-12
发明人： George Pieter Reitsma , Dongtai Liu
IPC分类号： G01R27/32
CPC分类号： G01R27/32 , G01D5/12 , G01D5/202 , G01R27/26 , G01R27/2611
摘要： Remote inductive sensing uses a sensor resonator with a remote sense inductor coupled to a resonator capacitor through a shielded transmission line. The T-line includes a signal line and a shield return line: the sense inductor is connected at a T-line sensing end between the signal line and the shield return line, and the resonator capacitor is connected at a T-line terminal end to at least the signal line. An inductance-to-data converter (IDC) is connected at the T-line terminal end to the signal line and shield return line (set to a common mode voltage). In operation, the IDC drives oscillation signals over the signal line to the sensor resonator to sustain a resonance state, with the sense inductor projecting a magnetic sensing field, and converts changes in oscillation drive signals, representing changes in resonance state resulting from a sensed condition, into sensor data corresponding to the sensed condition.
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公开(公告)号：US09875586B2
公开(公告)日：2018-01-23
申请号：US15003790
申请日：2016-01-21
CPC分类号： G07C9/00007 , E05B47/00 , E05B47/0045 , G07C9/00706 , G07C9/00714 , G07C2009/00611 , G07C2009/00777
摘要： An inductive coded lock system includes an inductive lock mechanism, and a conductive key/target. The inductive lock mechanism includes multiple inductor coils and sensor circuitry. Each inductor coil is operable to project a magnetic field defining a sensing area proximate to the inductor/coil, the inductor coils being spatially arranged to define a key/target sensing area incorporating each inductor coil sensing area. The sensor circuitry drives inductor coils, and measures sensor response (such as with an inductance comparator) to a key/target inserted within the key/target sensing area, including detecting an unlock condition corresponding to a pre-defined coded lock pattern. The key/target includes active and inactive areas (such as conductive/nonconductive) corresponding spatially to the sensing areas in the key target sensing area, the active and inactive areas arranged in a pre-defined coded key pattern corresponding to the pre-defined coded lock pattern. The coded lock and key patterns can be binary coded.
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公开(公告)号：US20160223483A1
公开(公告)日：2016-08-04
申请号：US14614234
申请日：2015-02-04
IPC分类号： G01N27/02 , G01N33/483 , G01N27/72
CPC分类号： G01N33/483 , A61B5/053 , A61B5/0531
摘要： A multi-frequency inductive sensing system can be used for spectrographic material analysis of a conductive target material (such as tissue) based on electrical impedance spectroscopy. An inductive sensor can be driven with an excitation current at multiple sensor excitation frequencies (ω) to project a time-varying magnetic field into a sensing area on the surface of the target material, inducing eddy currents within the target material. The inductive sensor can be characterized by a sensor impedance Z(ω) as a function of the sensor excitation frequency (ω), and the resulting induced eddy currents. Multiple sensor impedance Zs(ω) measurements, at the multiple sensor excitation frequencies (ω), can be determined, which represent electromagnetic properties of the target material (such as permittivity ε, permeability μ, and resistivity ρ), based on the induced eddy currents. The multiple sensor excitation frequencies (ω), and corresponding multiple sensor impedance Zs(ω) measurements, can be selected for particular target penetration depths.
摘要翻译： 基于电阻抗光谱法，多频感应感应系统可用于导电目标材料（如组织）的光谱材料分析。 感应传感器可以用多个传感器激励频率（ω）的激励电流驱动，以将时变磁场投射到目标材料表面上的感测区域，从而在目标材料内引起涡流。 感应传感器的特征在于传感器阻抗Z（ω）作为传感器激励频率（ω）的函数，以及所产生的感应涡流。 可以基于感应涡流来确定表示目标材料的电磁特性（例如介电常数ε，磁导率μ和电阻率ρ）的多传感器激励频率（ω）下的多传感器阻抗Zs（ω）测量值 电流。 可以为特定的目标穿透深度选择多个传感器激励频率（ω）和相应的多个传感器阻抗Zs（ω）测量值。
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5.发明申请INDUCTIVE SENSING INCLUDING INDUCTANCE MULTIPLICATION WITH SERIES CONNECTED COILS 有权电感式感应电感，包括电感线圈串联电感公开(公告)号：US20150211895A1
公开(公告)日：2015-07-30
申请号：US14611947
申请日：2015-02-02
IPC分类号： G01D5/20
CPC分类号： G01D5/202
摘要： Inductive position sensing uses inductance multiplication with series connected sensor coils. In one embodiment, a first sensing domain area is established in a first target plane using first and second sensor coils disposed on a longitudinal axis, on opposite sides of the first target plane and connected in series, so that a series-combined inductance is a multiple of a sum of the respective first and second coil inductances. Target position within the first sensing domain area of the first target plane is detected based on the series-combined inductance of the first and second coils, which changes as the target moves within the first sensing domain area of the first target plane. Further sensitivity can be achieved by additional coils, series connected on the same longitudinal axis, each coil pair defining a sensing area on a respective target plane intermediate the coils.
摘要翻译： 感应位置传感使用串联连接传感器线圈的电感倍增。 在一个实施例中，使用设置在第一目标平面的相对侧上的纵向轴线上的第一和第二传感器线圈并将其串联连接，在第一目标平面中建立第一感测区域区域，使得串联组合电感为 相应的第一和第二线圈电感之和的倍数。 基于第一和第二线圈的串联组合电感检测第一目标平面的第一感测区域内的目标位置，该第一和第二线圈在第一目标平面的第一感测区域内随着目标移动而改变。 可以通过串联连接在相同的纵轴上的附加线圈来实现进一步的灵敏度，每个线圈对限定在线圈之间的相应目标平面上的感测区域。
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公开(公告)号：US10036656B2
公开(公告)日：2018-07-31
申请号：US15333033
申请日：2016-10-24
摘要： A position detecting system detects and responds to the movement of a target through a sensing domain area of a plane. The movement causes the amount of the target that lies within a sensing domain area to change. A portion of the target always lies within at least one of the sensing domain areas of the plane.
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7.发明授权Inductive sensing including inductance multiplication with series connected coils 有权感应感应包括串联连接线圈的电感倍增公开(公告)号：US09157768B2
公开(公告)日：2015-10-13
申请号：US14611947
申请日：2015-02-02
CPC分类号： G01D5/202
摘要： Inductive position sensing uses inductance multiplication with series connected sensor coils. In one embodiment, a first sensing domain area is established in a first target plane using first and second sensor coils disposed on a longitudinal axis, on opposite sides of the first target plane and connected in series, so that a series-combined inductance is a multiple of a sum of the respective first and second coil inductances. Target position within the first sensing domain area of the first target plane is detected based on the series-combined inductance of the first and second coils, which changes as the target moves within the first sensing domain area of the first target plane. Further sensitivity can be achieved by additional coils, series connected on the same longitudinal axis, each coil pair defining a sensing area on a respective target plane intermediate the coils.
摘要翻译： 感应位置传感使用串联连接传感器线圈的电感倍增。 在一个实施例中，使用设置在第一目标平面的相对侧上的纵向轴线上的第一和第二传感器线圈并将其串联连接，在第一目标平面中建立第一感测区域区域，使得串联组合电感为 相应的第一和第二线圈电感之和的倍数。 基于第一和第二线圈的串联组合电感检测第一目标平面的第一感测区域内的目标位置，该第一和第二线圈在第一目标平面的第一感测区域内随着目标移动而改变。 可以通过串联连接在相同的纵轴上的附加线圈来实现进一步的灵敏度，每个线圈对限定在线圈之间的相应目标平面上的感测区域。
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公开(公告)号：US20140247040A1
公开(公告)日：2014-09-04
申请号：US14139701
申请日：2013-12-23
IPC分类号： G01D5/20
摘要： A position detecting system detects and responds to the movement of a target through a sensing domain area of a plane. The movement causes the amount of the target that lies within a sensing domain area to change. A portion of the target always lies within at least one of the sensing domain areas of the plane.
摘要翻译： 位置检测系统通过平面的感测域区域来检测和响应目标的移动。 移动导致位于感测区域内的目标的量改变。 目标的一部分始终位于平面的感测区域区域中的至少一个中。
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公开(公告)号：US10338055B2
公开(公告)日：2019-07-02
申请号：US15678095
申请日：2017-08-15
IPC分类号： G01N33/483 , A61B5/053
摘要： A multi-frequency inductive sensing system can be used for spectrographic material analysis of a conductive target material (such as tissue) based on electrical impedance spectroscopy. An inductive senor can be driven with an excitation current at multiple sensor excitation frequencies (ω) to project a time-varying magnetic field into a sensing area on the surface of the target material, inducing eddy currents within the target material. The inductive sensor can be characterized by a sensor impedance Z(ω) as a function of the sensor excitation frequency (ω), and the resulting induced eddy currents. Multiple sensor impedance Zs(ω) measurements, at the multiple sensor excitation frequencies (ω), can be determined, which represent electromagnetic properties of the target material (such as permittivity ε, permeability μ, and resistivity ρ), based on the induced eddy currents. The multiple sensor excitation frequencies (ω), and corresponding multiple sensor impedance Zs(ω) measurements, can be selected for particular target penetration depths.
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公开(公告)号：US09829501B2
公开(公告)日：2017-11-28
申请号：US14687690
申请日：2015-04-15
发明人： Dongtai Liu , Evgeny Fomin , George Pieter Reitsma
CPC分类号： G01P3/49 , G01D5/2006 , G01P3/48 , G01P3/481 , G01P3/487 , G01P13/045
摘要： A rotational sensing system is adaptable to sensing motor rotation based on eddy current sensing. An axial target surface is incorporated with the motor rotor, and includes one or more conductive target segment(s). An inductive sensor is mounted adjacent the axial target surface, and includes one or more inductive sense coil(s), such that rotor rotation rotates the target segment(s) laterally under the sense coil(s). An inductance-to-digital converter (IDC) drives sensor excitation current to project a magnetic sensing field toward the rotating axial target surface. Sensor response is characterized by successive sensor phase cycles that cycle between LMIN in which a sense coil is aligned with a target segment, and LMAX in which the sense coil is misaligned. The number of sensor phase cycles in a rotor rotation cycle corresponds to the number of target segments. The IDC converts sensor response measurements from successive sensor phase cycles into rotational data.
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