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公开(公告)号：US11519975B2
公开(公告)日：2022-12-06
申请号：US17520745
申请日：2021-11-08
发明人： Kaixin Yuan , Aiming Du , Ying Zhang , Lin Zhao , Shuquan Sun , Xiao Feng , Zhi Li
摘要： An offset data acquisition method and device of a fluxgate magnetometer are provided by the present disclosure, wherein the offset data acquisition method of the fluxgate magnetometer comprises: controlling the first analog switch, the second analog switch and the third analog switch to change directions within a preset period to obtain eight switch direction combinations between the first analog switch, the second analog switch and the third analog switch; acquiring magnetic field measurement data corresponding to an each of the switch direction combinations; and the magnetic field measurement data comprises x-axis magnetic field measurement data, y-axis magnetic field measurement data and z-axis magnetic field measurement data; and acquiring the offset data based on influence factors of an offset and the magnetic field measurement data within the preset period.
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公开(公告)号：US11373096B2
公开(公告)日：2022-06-28
申请号：US16904693
申请日：2020-06-18
发明人： Boris Chidlovskii , Leonid Antsfeld
摘要： A method of training a predictor to predict a location of a computing device in an indoor environment incudes: receiving training data including strength of signals received from wireless access points at positions of an indoor environment, where the training data includes: a subset of labeled data including signal strength values and location labels; and a subset of unlabeled data including signal strength values and not including labels indicative of locations; training a variational autoencoder to minimize a reconstruction loss of the signal strength values of the training data, where the variational autoencoder includes encoder neural networks and decoder neural networks; and training a classification neural network to minimize a prediction loss on the labeled data, where the classification neural network generates a predicted location based on the latent variable, and where the encoder neural networks and the classification neural network form the predictor.
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公开(公告)号：US20210262339A1
公开(公告)日：2021-08-26
申请号：US16974344
申请日：2020-12-03
IPC分类号： E21B47/0228 , G01C17/28 , G01C17/38 , G01V7/04
摘要： Systems and methods for determining azimuth of a wellbore while drilling. A method of drilling a wellbore that includes rotating a drill bit to extend the wellbore into a subterranean formation. The method may further include measuring magnetic toolface with a first magnetometer while rotating the drill bit. The method may further include obtaining a cross-axial magnetic field measurement. The method may further include determining azimuth at a point in the wellbore using at least the magnetic toolface and the cross-axial magnetic field measurement. The method may further include using the azimuth as feedback in the drilling the wellbore.
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公开(公告)号：US11079224B2
公开(公告)日：2021-08-03
申请号：US15771118
申请日：2016-10-25
申请人： Rohm Co., Ltd.
摘要： In this azimuth angle sensor, original magnetic detection data is sequentially acquired as data points in a triaxial coordinate system by detecting magnetism on three axes. An offset derivation device provided to the azimuth angle sensor derives offset values for correcting the original magnetic detection data and generating corrected magnetic detection data. The offset derivation device uses a plurality of data points in the original magnetic detection data or in the corrected magnetic detection data to derive provisional offset values, then derives the magnitude of magnetism on such an occasion on the basis of the original magnetic detection data and the provisional offset values. When the magnitude of magnetism thus derived is within a predetermined correction success range, the offset values are updated using the provisional offset values. When the magnitude of magnetism thus derived is not within the predetermined correction success range, the offset values are not updated.
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公开(公告)号：US20210055106A1
公开(公告)日：2021-02-25
申请号：US16693580
申请日：2019-11-25
发明人： Chiao-Hu CHANG , Wen-Ching CHANG , Shen-Wei CHANG
摘要： A compass device includes a base seat, a vial unit received in an accommodation hole of the base seat, an azimuth unit rotatably sleeved around the vial unit, a first spring wire disposed to resiliently retain the vial unit to the azimuth unit for magnetic declination adjustment, and a second spring wire disposed to resiliently retain the azimuth unit to the base seat for bearing angle measurement.
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公开(公告)号：US10921153B2
公开(公告)日：2021-02-16
申请号：US16153416
申请日：2018-10-05
发明人： Sanju Kuriakose , Sriram P R , John R. Morrison , Mark Ahlbrecht
摘要： Methods, apparatuses and systems for use of a magnetometer calibration (MAG-CAL) application to calibrate a magnetometer while an aircraft is in-flight including: generating a MAG-CAL calculated pattern based on a set of aircraft parameters for the in-air magnetometer calibration, the set of aircraft parameters at least comprise: speed, bank angle, altitude and position of the aircraft; generating a set of waypoints that define a calibration flight path corresponding to the MAG-CAL calculated pattern; Configuring the calibration flight path of the MAG-CAL calculated pattern to be part of the original flight path of the in-flight aircraft to enable the aircraft while flying the original flight to proceed in part on the calibration flight path corresponding to the MAG-CAL calculated pattern; and enabling the aircraft to deviate while in-flight from the original flight path to the calibration flight path to enable a sufficient level of calibration for accurate magnetometer operation.
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公开(公告)号：US10899469B2
公开(公告)日：2021-01-26
申请号：US15983507
申请日：2018-05-18
发明人： Zhenzhou Lai , Jianyu Song , Xiaogang Luo , Yun Yu
IPC分类号： G01C17/38 , B64D47/00 , G01R33/02 , G01R33/038 , B64C39/02 , B64D45/00 , G01R33/022
摘要： A method of detecting a magnetic field interference includes obtaining magnetic field information measured by each one of n magnetometers carried by a movable object, determining magnetic differences between the magnetic field information measured by m magnetometers of the n magnetometers, and determining whether the movable object is subject to a magnetic field interference based on the magnetic differences. n is an integer greater than or equal to 2, and m is an integer greater than or equal to 2 but smaller than or equal to n.
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公开(公告)号：US10898286B2
公开(公告)日：2021-01-26
申请号：US16424188
申请日：2019-05-28
申请人： Auris Health, Inc.
发明人： Subashini Srinivasan , Hedyeh Rafii-Tari , Ritwik Ummalaneni , David Paul Noonan , Prasanth Jeevan
摘要： Provided are systems and methods for path-based navigation of tubular networks. In one aspect, the method includes receiving location data from at least one of a set of location sensors and a set of robot command inputs, the location data being indicative of a location of an instrument configured to be driven through a luminal network. The method also includes determining a first estimate of the location of the instrument at a first time based on the location data, determining a second estimate of the location of the instrument at the first time based on the path, and determining the location of the instrument at the first time based on the first estimate and the second estimate.
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公开(公告)号：US20200320962A1
公开(公告)日：2020-10-08
申请号：US16838450
申请日：2020-04-02
发明人： Jinik KIM , Namjoon PARK , Jeongmin PARK
摘要： A foldable mobile terminal apparatus and control method are provided. The apparatus includes a first section, a second section coupled to the first section and movable between a folded state and an unfolded state including a plurality of partially folded states, a flexible display coupled to the first and second sections, a first sensor, and at least one processor to, while the mobile terminal apparatus is partially folded, identify one of the partially folded states of the mobile terminal apparatus, and control the display to display information corresponding to a compass direction based on magnetic related information obtained by the first sensor and according to the identified partially folded states. The electronic device can prevent distortion of the first sensor caused by the display by calibrating the geomagnetic value of the sensor based on an angle between a first surface of a first section and a third surface of the second section.
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10.发明申请公开(公告)号：US20200310542A1
公开(公告)日：2020-10-01
申请号：US16902793
申请日：2020-06-16
摘要： A method of controlling a gimbal includes receiving angular velocity information transmitted by a somatosensory controller, the angular velocity information including an angular velocity of the somatosensory controller in a geodetic coordinate system, determining a target attitude of the gimbal according to the angular velocity information, and controlling the gimbal according to the target attitude.
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