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51.发明授权公开(公告)号：US11378711B2
公开(公告)日：2022-07-05
申请号：US16438104
申请日：2019-06-11
IPC分类号： G01R33/14 , G01V3/10 , H02J5/00 , H02J7/02 , B60L3/00 , B60L3/04 , B60L53/36 , B60L55/00 , B60L53/65 , B60L53/66 , B60L50/60 , B60L53/124 , B60L53/68 , B60L53/122 , B60L53/126 , B60L53/30 , H02J50/10 , H02J50/12 , B60L53/12
摘要： An apparatus for detecting a presence of an object includes an inductive sensing coil that is configurable to generate a first magnetic field. The inductive sensing coil is configured to have an electrical characteristic that is detectable when generating the first magnetic field. The electrical characteristic is configured to vary as a function of a second time-varying magnetic field simultaneously applied to the object. The apparatus comprises a controller configured to detect a change in the electrical characteristic and determine a presence of the object based on the detected change in the electrical characteristic. The electrical characteristic comprises one or more of an equivalent resistance, an equivalent inductance, an equivalent impedance, and an impulse response of the inductive sensing coil. The object comprises one or more of a ferromagnetic object, a metallic film and a metallic foil.
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公开(公告)号：US20220194295A1
公开(公告)日：2022-06-23
申请号：US17645376
申请日：2021-12-21
IPC分类号： B60Q9/00 , G01V3/10 , G01V3/08 , B60R16/027 , G08B21/18
摘要： A method of measuring a user's contact or proximity to a vehicle steering wheel, comprising the steps of measuring the user's contact or proximity to the vehicle steering wheel during a phase of use of the vehicle steering wheel resulting in generating of a measurement signal (SM), storing in a second memory unit at least part of the values of the measurements taken, adjusting the detection threshold (S2M/1M) based on the stored values and/or processing carried out on the stored values.
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公开(公告)号：US20220146345A1
公开(公告)日：2022-05-12
申请号：US17583610
申请日：2022-01-25
申请人： Bently Nevada, LLC
摘要： A gap compensated stress sensing system and methods for using the same are provided. The system can include a sensor head in communication with a controller. The sensor head can contain a stress sensor configured to generate a stress signal representing stress applied to a target based upon measurement of generated magnetic fluxes passing through the target. The system can also include a drive circuit configured to provide a current for generation of the magnetic fluxes, and to measure signals characterizing a gap between the sensor head and the target. The controller can analyze these signals to determine a gap-dependent reference signal that is relatively insensitive to electrical runout. The controller can further adjust the stress signal based upon the gap-dependent reference signal to determine an improved stress signal that has reduced sensitivity to gap changes.
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公开(公告)号：US20220113443A1
公开(公告)日：2022-04-14
申请号：US17555429
申请日：2021-12-18
发明人： Scott B. Cole , Klayton Day Jones , David R. Brown
摘要： An antenna arrangement. The arrangement uses four conductive loops, each within a distinct plane from the other conductive loops. The four conductive loops have a common center point. Each loop is within a dipole magnetic field, and detects a component thereof. By balancing the signals received between matched pairs of the conductive loops, the difference between the signals can be used to guide the antenna arrangement to a null point—that is—a point in the magnetic field where each pair of conductive loops is balanced. The antenna arrangement can further be used to determine the depth of the dipole field source using the magnitude of the field.
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公开(公告)号：US11287337B2
公开(公告)日：2022-03-29
申请号：US16513686
申请日：2019-07-16
申请人： Bently Nevada, LLC
摘要： A gap compensated stress sensing system and methods for using the same are provided. The system can include a sensor head in communication with a controller. The sensor head can contain a stress sensor configured to generate a stress signal representing stress applied to a target based upon measurement of generated magnetic fluxes passing through the target. The system can also include a drive circuit configured to provide a current for generation of the magnetic fluxes, and to measure signals characterizing a gap between the sensor head and the target. The controller can analyze these signals to determine a gap-dependent reference signal that is relatively insensitive to electrical runout. The controller can further adjust the stress signal based upon the gap-dependent reference signal to determine an improved stress signal that has reduced sensitivity to gap changes.
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公开(公告)号：US11280930B2
公开(公告)日：2022-03-22
申请号：US16491387
申请日：2018-03-06
申请人： Salunda Limited
IPC分类号： G01V3/28 , G01V3/10 , E21B47/092
摘要： A sensor system for sensing the contents of a bore including a plurality of coils disposed behind a non-metallic lining. An oscillator circuit may be used to drive the coils to generate oscillating electromagnetic fields, and a detection circuit generates output signals from each coil representing a parameter of the electrical oscillations that depends on the contents of the bore. The coils may include a primary coil and a one secondary coil, wherein the oscillating electromagnetic field generated by the secondary coil has a lesser degree of interaction with the contents of bore than the oscillating electromagnetic field generated by the primary coil. The sensor system may use the output signal from the secondary coil to compensate the output signal from the primary coil for environmental effects.
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公开(公告)号：US20220011459A1
公开(公告)日：2022-01-13
申请号：US17297642
申请日：2019-01-21
发明人： Levent TURA , Gökhan BÜLKÜ
摘要： This invention is related to the method providing computation of the signal frequency components in an acceptable accuracy in contravention of the shifts in the phase and the magnitude information caused by asynchronous sampling of the signals in the process of asynchronous sampling of metal detectors wherein the received signal by the receiver unit (4) divided into time intervals, say timing values those are far shorter than the sampling period and correspond to nearest probable sampling of the ADC (6); providing the computation of the sine and cosine coefficients or exponents of time constant coefficients of the said timing value from previously located or dynamically generated coefficient table; resulting the elimination of the requirement of synchronous sampling and the requirement of the signal period is multiple of the sampling period.
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公开(公告)号：US11199425B2
公开(公告)日：2021-12-14
申请号：US16584840
申请日：2019-09-26
申请人： Apple Inc.
发明人： Savas Gider , Jian Guo , John Greer Elias
摘要： Magnetic sensing technology can be used to detect changes, or disturbances (e.g., changes in magnetic field strength), in magnetic fields and can be used to measure the precise location/positioning of an electronic device in proximity to a magnetic source. In order to avoid interference by earth's static magnetic field, a modulated magnetic field can be used for magnetic based proximity sensing. Received modulated magnetic field signals can be demodulated to determine a received magnetic field strength. A drive current of a magnetic transmitter coil can be varied to maintain the detected magnetic field strength at a target value or within a desirable range. The drive current can also be varied to remain below a burnout current level that can cause damage to the transmitter coil.
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公开(公告)号：US20210384777A1
公开(公告)日：2021-12-09
申请号：US16893424
申请日：2020-06-04
申请人： AIRA, Inc.
摘要： Systems, methods and apparatus for wireless charging are disclosed. A method for operating a charging device includes providing a charging current to a resonant circuit when a receiving device is present on a surface of the wireless charging device, providing a zero-crossing signal that includes edges corresponding to transitions of a voltage measured across the resonant circuit through a zero volt level or to transitions of a current in the resonant circuit through a zero ampere level, providing a measurement slot by decreasing or terminating the charging current for a period of time, and determining whether an object other than the receiving device is present on a surface of the charging device based on measurements of samples of voltage or current captured based on timing provided by the zero-crossing signal, wherein the samples are captured during the measurement slot.
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公开(公告)号：US11112522B2
公开(公告)日：2021-09-07
申请号：US16684677
申请日：2019-11-15
申请人： Bently Nevada, LLC
发明人： Dan Tho Lu , David Lopez
摘要： Self-testing proximity testing systems and corresponding methods are discussed herein and can include a proximity probe and controller in electrical communication via a cable. A self-testing subsystem can be in communication with the controller and configured to determine whether proximity probes and cables assembled with a controller are compatible or incompatible. The self-testing subsystem can place a known impedance in electrical communication with the controller, modifying a proximity signal output by the controller. When the modified proximity signal differs from a predicted proximity signal by greater than or equal to a threshold amount, the self-testing subsystem can output a first indication indicating that incompatible proximity probes and cables are assembled with a controller. When the modified proximity signal differs from a predicted proximity signal by less than the threshold amount, the self-testing subsystem can output a second indication indicating that compatible proximity probes and cables are assembled with a controller.
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