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1. 发明公开

US20240310552A1 DENSITY DETERMINATION METHOD, APPARATUS AND ELECTRONIC DEVICE 审中-公开
公开(公告)号：US20240310552A1
公开(公告)日：2024-09-19
申请号：US18575639
申请日：2022-07-04
申请人： THE INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCES
发明人： Zhenli WANG
IPC分类号： G01V7/00 , G01N9/00
CPC分类号： G01V7/00 , G01N9/00
摘要： Disclosed are density determination method, apparatuses, and electronic device, applied in geophysical exploration, comprising: acquiring Bouguer gravity anomalies at measurement points for a target body to be measured; determining a Bouguer gravity anomaly of the target body for each measurement point as a first anomaly based on the Bouguer gravity anomalies at the measurement points, and determining a Bouguer gravity anomaly of a reference body corresponding to the target body to be measured at the measurement point as a second anomaly at the measurement point, based on the Bouguer gravity anomalies at the measurement points; calculating a difference between the first anomaly and the second anomaly at the measurement point as a local gravity anomaly; and performing density inversion on the target body to be measured to obtain density distribution in transverse cross-section of the target body, thereby obtaining the density of the target body more accurately.

2. 发明授权

US11914100B2 Method for determining the inverse of gravity correlation time 有权
公开(公告)号：US11914100B2
公开(公告)日：2024-02-27
申请号：US17421245
申请日：2020-06-04
申请人： SOUTHEAST UNIVERSITY
发明人： Tijing Cai
IPC分类号： G01V7/06 , G01V7/00 , G01V7/16
CPC分类号： G01V7/06 , G01V7/00 , G01V7/16
摘要： The present invention discloses a method for determining an inverse of gravity correlation time. During data processing on gravity measurement of moving bases, a gravity anomaly is considered as a stationary random process in a time domain, and is described with a second-order Gauss Markov model, a third-order Gauss Markov model or an mth-order Gauss Markov model, and the inverse of gravity correlation time is an important parameter of the gravity-anomaly model, and according to a gravity sensor root mean square error, a Global Navigation Satellite System (GNSS) height root mean square error, an a priori gravity root mean square, and a gravity filter cutoff frequency during the gravity measurement of the moving bases, an inverse of gravity correlation time of the second-order, third-order or mth-order Gauss Markov model is determined. According to the method for determining an inverse of gravity correlation time provided in the present invention, a forward and backward Kalman filter during data processing on gravity measurement of moving bases can be adjusted, to obtain a high-precision and high-wavelength-resolution gravity anomaly value.

3. 发明公开

US20230334847A1 NORMAL ESTIMATION FOR A PLANAR SURFACE 审中-公开
公开(公告)号：US20230334847A1
公开(公告)日：2023-10-19
申请号：US18099600
申请日：2023-01-20
申请人： Apple Inc.
发明人： Oliver Thomas Ruepp , Pedro Antonio Pinies Rodriguez
IPC分类号： G06V20/00 , G01V7/00 , G06T7/73
CPC分类号： G06V20/00 , G01V7/00 , G06T7/73
摘要： Various implementations disclosed herein include devices, systems, and methods for normal estimation using a directional measurement, such as a gravity vector. In various implementations, a device includes a non-transitory memory and one or more processors coupled with the non-transitory memory. In some implementations, a method includes identifying planar surfaces in an environment represented by an image. Each planar surface is associated with a respective orientation. A directional vector associated with the environment is determined. A subset of the planar surfaces that have a threshold orientation relative to the directional vector is identified. For each planar surface in the subset of the planar surfaces, a normal vector for the planar surface is determined based on the orientation of the planar surface and the directional vector.

4. 发明授权

US11662500B2 Submarine position detection method based on extreme points of gravity gradients 有权
公开(公告)号：US11662500B2
公开(公告)日：2023-05-30
申请号：US17017526
申请日：2020-09-10
申请人： China University of Geosciences (Beijing)
发明人： Xiaoyun Wan , Xianghang Zeng
IPC分类号： G01V7/06 , G01V7/02 , G01V7/00 , G08G3/00 , G01V7/16
CPC分类号： G01V7/06 , G01V7/00 , G01V7/02 , G01V7/16 , G08G3/00
摘要： The present disclosure discloses a submarine position detection method based on extreme points of gravity gradients. A space rectangular coordinate system is established by taking a centroid of the middle cylindrical portion as a coordinate origin, a direction pointing to a bow is taken as a forward direction of the X axis, a direction pointing to a port is taken as a forward direction of the Y direction, and a vertical upward direction is taken as a forward direction of the Z axis. The detection method includes steps of: determining a horizontal position of a submarine, i.e., coordinates (X, Y), according to a position of a central extreme point and a central position between extreme points of non-diagonal components of a gradient tensor; and determining a functional relation between a depth and the extreme points of gravity gradients by using the submarine model.

5. 发明授权

US11181372B2 Gravimeter or inertial sensor system using a resonant sensor and method of operating a gravimeter or inertial sensor system 有权
公开(公告)号：US11181372B2
公开(公告)日：2021-11-23
申请号：US16307606
申请日：2017-06-08
申请人： Cambridge Enterprise Limited
发明人： Ashwin Seshia , Xudong Zou
IPC分类号： G01C19/5776 , G01P15/097 , G01V7/00
摘要： A gravimeter or inertial sensor system and method of operating such a system is provided. The system comprises a variable frequency signal source (100, 101, 102) configured to provide first and second signals, a resonant sensor (103) connected to receive the first signal, a phase comparator (111) connected to the output of the resonant sensor and to receive the second signal, and a controller (114) connected to the phase comparator. In a first mode, the controller controls the desired frequency of the signals from the variable frequency signal source based on a value of the phase comparator output signal to lock the frequency of the input signals to a resonant frequency of the resonant sensor. In a second mode, the controller disconnects from the variable frequency signal source and records an open loop output signal indicative of the physical parameter to be measured based on the response of the resonant sensor.

6. 发明授权

US11150843B2 Storage device and method of operating the same 有权
公开(公告)号：US11150843B2
公开(公告)日：2021-10-19
申请号：US16930857
申请日：2020-07-16
申请人： SK hynix Inc.
发明人： Jin Soo Kim , Soong Sun Shin
IPC分类号： G06F13/00 , G06F3/06 , G01C19/00 , G01V7/00 , G01C17/02 , G01P15/00 , G11C16/22 , G11C16/04
摘要： Provided herein may be a storage device and a method of operating the same. A storage device for protecting the storage device from physical movement may include a nonvolatile memory device, a sensor unit configured to collect information about physical movement of the storage device, and a memory controller configured to perform a device lock operation of protecting data in the nonvolatile memory device, based on a sensor value acquired from the sensor unit.

7. 发明授权

US10641077B2 Determining angular offset between geomagnetic and gravitational fields while drilling wellbore 有权
公开(公告)号：US10641077B2
公开(公告)日：2020-05-05
申请号：US15487214
申请日：2017-04-13
申请人： Weatherford Technology Holdings, LLC
发明人： Daniel Sullivan , Liam A. Lines
IPC分类号： E21B44/00 , G01V11/00 , E21B47/022 , E21B47/024 , E21B7/04 , G01V3/00 , G01V7/00
CPC分类号： E21B44/00 , E21B47/022 , E21B47/024 , G01V11/00 , E21B7/04 , G01V3/00 , G01V7/00
摘要： An apparatus is directed relative to geomagnetic and gravitational fields of reference while advancing with rotation in a borehole by determining angular position of the apparatus during the rotation and correcting the angular position of the apparatus relative to an offset of a toolface of the apparatus. To do the correction, a magnetic toolface of the apparatus during the rotation is determined based on geomagnetic readings of the apparatus in each of a plurality of divisions of the rotation relative to the geomagnetic field, and a gravitational toolface of the apparatus during the rotation is determined based on gravitational readings of the apparatus in each of the divisions of the rotation relative to the gravitational field. The offset of the toolface is then calculated as a difference between the magnetic toolface and the gravitational toolface. The corrected angular position can then be used in directing the apparatus.

8. 发明申请

US20190277998A1 COMPACT AND HIGHLY SENSITIVE GRAVITY GRADIOMETER 审中-公开
公开(公告)号：US20190277998A1
公开(公告)日：2019-09-12
申请号：US15917256
申请日：2018-03-09
申请人： SRI International
发明人： Jesse Wodin , Sunil Goda , Eric Lavelle , Jan van der Laan , Ronald Pelrine , David Watt
IPC分类号： G01V7/00 , G01V7/04 , G01V7/06
摘要： Example gravity gradiometers are described that utilize high precision resonant optical cavities to measure changes in gravitational forces at high sensitivities. In one example, a sensing system includes a gravity gradiometer and a controller. The gravity gradiometer includes a first mirror and a second mirror arranged to form an optical cavity having an optical axis. The controller is configured to detect, responsive to displacement of at least one of the first mirror and the second mirror along the optical axis, a change in gravity gradient.

9. 发明授权

US10378921B2 Method and apparatus for correcting magnetic tracking error with inertial measurement 有权
公开(公告)号：US10378921B2
公开(公告)日：2019-08-13
申请号：US14797983
申请日：2015-07-13
申请人： Sixense Entertainment, Inc.
发明人： Owen Walter Pedrotti , Oded Y. Zur
IPC分类号： G01C25/00 , G01R33/00 , G01V7/00
摘要： A method and apparatus is disclosed for synchronizing a magnetic field transmitter and receiver to resolve phase ambiguity so that phase information for the position and orientation of the receiver may be derived and maintained. A synchronization process allows for the phase information to be initially derived based upon known information from other sources, and then tracked from one measurement to the next. In another embodiment, information from an inertial measurement unit (IMU) is used to determine the phase information or to correct for errors in the determination from receiver data of the position and orientation of a receiver, and prevent such errors from accumulating as the receiver moves away from a transmitter.

10. 发明授权

US10297358B2 Beam splitters 有权
公开(公告)号：US10297358B2
公开(公告)日：2019-05-21
申请号：US15317870
申请日：2015-06-10
申请人： The Secretary of State for Business, Innovation & Skills
发明人： Yuri Borisovich Ovchinnikov
IPC分类号： G21K1/00 , G21K1/06 , G01C19/02 , G01P15/02 , H05H3/04 , G01V7/00
摘要： A temporally continuous matter wave beam splitter (14) comprising a plurality of intersecting and interfering laser beam (kr, kb), which act as waveguides for a matter wave beam. The laser beams of the waveguides each have a frequency detuned below a frequency of an internal atomic transition of the matter wave. The matter wave has a wavevector which is an integral multiple of the wavevector of the laser beams within a region of intersection of the laser beams. There is also provided an atomic interferometer (200) comprising such a continuous matter wave beam splitter, and a solid state device comprising such a continuous matter wave beam splitter, which may be part of an atomic interferometer. A cold atom gyroscope, a cold atom accelerometer or a cold atom gravimeter comprising such a solid state device are also provided. There is further provided a quantum computer comprising such a solid state device, wherein atoms of the matter wave beam are in an entangled quantum state. There is also provided a method of splitting a matter wave beam, comprising introducing the matter wave beam into a first temporally continuous laser beam, the frequency of which is detuned below a frequency of an internal atomic transition of the matter wave beam; intersecting and interfering the first continuous laser beam with a second temporally continuous laser beam, the frequency of which is also detuned below the frequency of the internal atomic transition of the matter wave beam; providing the matter wave beam with a wavevector which is an integral multiple of the wavevector of the first and second laser beams within a region of intersection of the laser beams, whereby the laser beams act as waveguides for the matter wave beam.

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