公开(公告)号：US20240353504A1

公开(公告)日：2024-10-24

申请号：US18636334

申请日：2024-04-16

申请人： THE REGENTS OF THE UNIVERSITY OF MICHIGAN

发明人： Eftyhia ZESTA ,  Alex HOFFMANN ,  Lauro V. OJEDA ,  Mark B. MOLDWIN

IPC分类号： G01R33/00 ,  G01V3/38 ,  G01V3/40

CPC分类号： G01R33/0029 ,  G01V3/38 ,  G01V3/40 ,  G01R33/0094

摘要： A system and method for separating spacecraft generated magnetic noise from geomagnetic field data includes detecting magnetic information using a plurality of magnetometers and outputting a representative detection signal, the magnetic information comprising magnetic noise and geomagnetic field data; receiving the representative detection signal including the magnetic information from the plurality of magnetometers and resolving the magnetic noise data and the geomagnetic field data by analyzing a relative gain and phase of the representative detection signal in a time-frequency (TF) domain, if a noise signal of the representative detection signal is sparse in the TF domain then the relative gain and phase is found using cluster analysis, and separating a geomagnetic field data signal from a magnetic noise data signal using cluster centroids in compressive sensing based on the cluster analysis. The system and method further includes outputting a resultant signal representative of at least the geomagnetic field data signal.

公开(公告)号：US20240069122A1

公开(公告)日：2024-02-29

申请号：US18456750

申请日：2023-08-28

申请人： Infineon Technologies AG

发明人： Edwin Mario MOTZ

IPC分类号： G01R33/00 ,  G01R33/07 ,  G01R33/09

CPC分类号： G01R33/0029 ,  G01R33/07 ,  G01R33/098

摘要： A magnetic sensor apparatus includes a magnetic field generating circuit which is configured to generate a magnetic field, a magnetic field sensor circuit which is configured to output a sensor signal in response to the magnetic field, which sensor signal has a signal amplitude dependent on a sensitivity of the magnetic field sensor circuit, an amplifier circuit which is configured to amplify the sensor signal and to output an amplified sensor signal with an amplified signal amplitude, and a control circuit which is configured to use a setting signal to set a supply signal of the magnetic field sensor circuit and/or a gain of the amplifier circuit such that the amplified signal amplitude corresponds to a target amplitude.

公开(公告)号：US20240027506A1

公开(公告)日：2024-01-25

申请号：US18245803

申请日：2021-09-20

申请人： EV-TECHNOLOGIES

发明人： Sidina WANE

IPC分类号： G01R29/08 ,  G01R33/00

CPC分类号： G01R29/0878 ,  G01R29/0871 ,  G01R33/0029 ,  G01R33/0094 ,  G01R33/0005

摘要： The present disclosure relates to a probe for sensing magnetic and electric fields comprising: first and second sensing elements (102, 104), each comprising first and second terminals (106, 108), the sensing elements being orientated in opposite directions from each other (x+, x−); and a measurement circuit configured to either: measure voltage and current across the first and second terminals (106, 108) of each of the sensing elements (102, 104) to detect electric and magnetic fields; or to couple the first terminals (106) of each of the sensing elements (102, 104) to a reference voltage (GND) and to measure a voltage present at the second terminal (108) to detect an electric field, and to couple the first terminal (108) of each of the sensing elements (102, 104) to an open circuit impedance (Zo) and to measure a current present at the second terminal (108) to detect a magnetic field.

公开(公告)号：US11835596B2

公开(公告)日：2023-12-05

申请号：US17264654

申请日：2019-10-15

申请人： Robert Bosch GmbH

发明人： Peter Bakucz

IPC分类号： G01R33/00 ,  G01R33/02 ,  G08G1/14 ,  G01V3/08

CPC分类号： G01R33/0029 ,  G01R33/0206 ,  G01V3/081 ,  G08G1/141

摘要： A magnetic parking sensor including a detection device for detecting geomagnetic measured values in the region of a parking space in three coordinates; a first-in, first-out memory device into which the geomagnetic measured values are loadable; and an ascertainment device. The ascertainment device is configured to map the x and y components of the geomagnetic measured values into complex numbers, the complex numbers being ascertainable depending on the variability of the defined number of the geomagnetic measured values; to define a number system having a defined number of elements in accordance with the variability of the geomagnetic measured value and of the complex numbers; and to ascertain an availability state of the parking space by ascertaining a root λn of the polynomial λ3−(2n−1)λ2−(n−1)2λ−(n2+1), where n=variability of the geomagnetic measured values, λ=auxiliary variable of the number theory.

公开(公告)号：US11768258B2

公开(公告)日：2023-09-26

申请号：US16952094

申请日：2020-11-19

申请人： Shunsuke Kudo

发明人： Shunsuke Kudo

IPC分类号： A61B5/245 ,  A61B5/369 ,  G16H50/70 ,  G01R33/00 ,  G16H40/67

CPC分类号： G01R33/0029 ,  A61B5/245 ,  A61B5/369 ,  G16H40/67 ,  G16H50/70

摘要： A signal separating apparatus includes circuitry to separate a signal of interest and other signal other than the signal of interest from each other in accordance with spatial information on a plurality of sensors installed at locations different from each other. The circuitry sets a parameter based on a spread of a subspace of the signal of interest, determines a degree of separation that serves as an index indicative of whether the set parameter is appropriate, and separates the signal of interest and the other signal from each other using the degree of separation.

公开(公告)号：US20190250220A1

公开(公告)日：2019-08-15

申请号：US16394338

申请日：2019-04-25

申请人： Allegro MicroSystems, LLC

发明人： Alexander Latham ,  Michael C. Doogue ,  Jason Boudreau

IPC分类号： G01R33/00 ,  G01R33/032 ,  H01F5/00 ,  G01N27/90 ,  G01R33/12 ,  G01R33/025

CPC分类号： G01R33/0094 ,  G01N27/90 ,  G01R33/0005 ,  G01R33/0011 ,  G01R33/0017 ,  G01R33/0029 ,  G01R33/025 ,  G01R33/032 ,  G01R33/1284 ,  H01F5/003 ,  H01F2027/348

摘要： An apparatus comprises a first substrate and two coils supported by the first substrate and arranged next to each other, the coils configured to each generate a magnetic field which produces eddy currents in and a reflected magnetic field from a conductive target, the two coils arranged so their respectively generated magnetic fields substantially cancel each other in an area between the coils. One or more magnetic field sensing elements are positioned in the area between the coils and configured to detect the reflected magnetic field.

公开(公告)号：US20190178684A1

公开(公告)日：2019-06-13

申请号：US15836975

申请日：2017-12-11

申请人： NXP B.V.

发明人： Stephan Marauska ,  Jan Przytarski ,  Jörg Kock ,  Edwin Schapendonk

IPC分类号： G01D5/244

CPC分类号： G01D5/2448 ,  G01R33/0005 ,  G01R33/0017 ,  G01R33/0029 ,  G01R33/025 ,  G01R33/091 ,  G01R33/093 ,  G01R33/096 ,  G01R33/098

摘要： A system includes a magnetic sense element for detecting an external magnetic field along a sensing axis and a magnetic field source proximate the magnetic sense element for providing an auxiliary magnetic field along the sensing axis. The magnetic sense element produces a first output signal having a magnetic field signal component, responsive to the external magnetic field, that is modulated by an auxiliary magnetic field signal component responsive to the auxiliary magnetic field. A processing circuit identifies from the first output signal an influence of a magnetic interference field on the auxiliary magnetic field signal component, the magnetic interference field being directed along a non-sensing axis of the magnetic sense element, and applies a correction factor to the magnetic field signal component to produce a second output signal in which the influence of the magnetic interference field is substantially removed.

公开(公告)号：US20180329000A1

公开(公告)日：2018-11-15

申请号：US15969053

申请日：2018-05-02

申请人： Melexis Technologies SA

发明人： Javier BILBAO DE MENDIZABAL ,  Mathieu POEZART ,  Gael CLOSE

IPC分类号： G01R33/00 ,  G01R33/07 ,  G01R33/09 ,  G01L9/04 ,  G01L27/00

CPC分类号： G01R33/0029 ,  G01D18/00 ,  G01L9/04 ,  G01L27/00 ,  G01R31/2829 ,  G01R33/07 ,  G01R33/093 ,  G01R33/098

摘要： A method for detecting an error in a bridge sensor which is adapted for measuring a physical parameter. The method comprises biasing a first contact pair of the bridge sensor at least two times in a first direction and at least one time in a second direction opposite to the first direction; while biasing the first contact pair, measuring an output signal on a different contact pair of the bridge sensor, thus obtaining at least three output measurements which are representative for the physical parameter and which are separated by time intervals; combining the output measurements to obtain an output value which is indicative for an error in the bridge sensor, wherein the output measurements which are combined are only those output measurements which are measured when biasing the first contact pair.

公开(公告)号：US20180224508A1

公开(公告)日：2018-08-09

申请号：US15888969

申请日：2018-02-05

申请人： Boston Scientific Scimed Inc.

发明人： David W. Kelly ,  Eric P. Bailey

IPC分类号： G01R33/00 ,  H04J1/12 ,  H04J11/00 ,  G01D5/14 ,  A61B5/06

CPC分类号： G01R33/0029 ,  A61B5/061 ,  A61B5/062 ,  A61B5/7203 ,  A61B5/7225 ,  A61B5/725 ,  A61B2034/2051 ,  G01D5/14 ,  G01R33/02 ,  G01R33/091 ,  H04J1/12 ,  H04J11/0036 ,  H04J11/0063 ,  H04J2011/0096

摘要： A method uses an electromagnetic navigation system, including a number of field transmitters and at least one receiver. The method includes receiving a field signal from the at least one receiver, and the field signal includes a number of different frequencies corresponding to each of the field transmitters. The received field signal is multiplied by a synchronization signal using a frequency-division multiplexing scheme, and the received field signal is integrated over a predetermined sampling interval and converted into an integrated signal having only a desired signal based on the synchronization signal. The integrated signal is outputted for subsequent processing of the electromagnetic navigation system.

公开(公告)号：US20180195895A1

公开(公告)日：2018-07-12

申请号：US15910328

申请日：2018-03-02

申请人： INSTITUTE OF GEOLOGY AND GEOPHYSICS CHINESE ACADEMY OF SCIENCES (IGGCAS)

发明人： SHUQUAN SUN ,  AIMIN DU ,  LIN ZHAO ,  HENG TANG ,  QIONG LI ,  XIAO FENG ,  CUIHONG LI ,  QINGYUN DI

IPC分类号： G01H11/02 ,  G01R33/04 ,  G01D5/12 ,  G01R33/00 ,  G01R33/032

CPC分类号： G01H11/02 ,  G01D5/125 ,  G01R33/0029 ,  G01R33/0041 ,  G01R33/0322 ,  G01R33/04

摘要： A magnetic field based micro-vibration measurement device and a measuring therefore are provided, which are applied in a micro-vibration measurement technical field. Fluxgate sensors and a control processing circuit are included. Each of the fluxgate sensors is disposed with an excitation coil and an induction coil that are mutually corresponding; the control processing circuit includes: an excitation signal generating module, a frequency-selective amplifying module, a phase-sensitive rectifying module, a smooth filtering module an ambient magnetic field acquisition module, and a vibration data statistics module. Excitation coils generate excitation magnetic field signals according to the excitation signal sent from the excitation signal generating module the induction coils are for generating induced current signals according to the receive excitation magnetic field signal and the ambient magnetic field signal. Induced current signals are calculated to obtain ambient magnetic field data after sequentially undergoing selective amplification, rectification and smooth filtering.