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1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 发明申请

US20190065113A1 STORAGE DEVICE AND METHOD OF OPERATING THE SAME 审中-公开
公开(公告)号：US20190065113A1
公开(公告)日：2019-02-28
申请号：US15919704
申请日：2018-03-13
申请人： SK hynix Inc.
发明人： Jin Soo KIM , Soong Sun SHIN
IPC分类号： G06F3/06 , G01P15/00 , G01C19/00 , G01V7/00 , G01C17/02
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

US10216290B2 Gyroscope apparatus 有权
公开(公告)号：US10216290B2
公开(公告)日：2019-02-26
申请号：US15483967
申请日：2017-04-10
申请人： Adtile Technologies Inc.
发明人： Angelo Scandaliato , Nils Forsblom , Maximilian Metti
IPC分类号： G06F3/0346 , G01C17/28 , G01V7/02 , G01V7/00 , G06F3/01
摘要： A gyroscope apparatus for a device including an accelerometer and a magnetic component has a gravity vector generator connected to the accelerometer and receptive to acceleration readings therefrom. A magnetic component output generator is connected to the magnetic component and receptive to magnetic component readings. A sensor fusion engine is connected to the gravity vector generator and to the magnetic component output generator, with a gravity vector value and a magnetic field vector value at a first time instance being combined to represent a first orientation value. The gravity vector value and the magnetic field vector value at a second time instance are combined to represent a second orientation value. An orientation rate of change is derived from a difference between the first orientation value and the second orientation value.

8. 发明授权

US10132957B2 Optomechanical device for actuating and/or detecting movement of a mechanical element, in particular for gravimetric detection 有权
公开(公告)号：US10132957B2
公开(公告)日：2018-11-20
申请号：US14519390
申请日：2014-10-21
申请人： Commissariat à l'énergie atomique et aux énergies alternatives
发明人： Sébastien Hentz , Laurent Duraffourg , Guillaume Jourdan
IPC分类号： G01V7/00 , G01D5/26 , G01D5/353 , G02B6/35 , G01N5/00 , G02B6/12 , G01G3/16 , G01N15/06 , G02B6/293
摘要： Optomechanical device for actuating and/or detecting movement of a mechanical element, in particular for gravimetric detection. It includes a support with a mechanical element anchored to the support which is designed to move relative to the element, and a device for actuating and/or detecting movement or of variations in frequency of movement of the element. A portion of the device is arranged beneath at least part of the element, between the element and the support. The device includes a fixed optical device with at least one optical waveguide arranged beneath all or part of the element at a determined distance from the element, and which is designed to propagate at least one optical wave having a given wavelength designed to interact with the element. The optical waveguide is at a determined distance from the mechanical element so that the evanescent field of the optical waveguide interacts with the mechanical element.

9. 发明授权

US10119987B2 Measuring acceleration using interferometry with reduced environmental effects 有权
公开(公告)号：US10119987B2
公开(公告)日：2018-11-06
申请号：US15007752
申请日：2016-01-27
申请人： Robert W. Adams , Carl M. Edwards , Sebastian Csutak , Felix Wellmann , Otto Fanini
发明人： Robert W. Adams , Carl M. Edwards , Sebastian Csutak , Felix Wellmann , Otto Fanini
IPC分类号： G01P15/08 , G01P15/13 , G01P15/03 , G01P1/00 , G01V7/00
摘要： An apparatus for measuring acceleration includes: a reference cavity having a first fixed reflecting surface and a second fixed reflecting surface; a sense cavity having a fixed reflecting surface and a non-fixed reflecting surface, the non-fixed reflecting surface being configured to be displaced when subject to an acceleration force; a light source to illuminate the reference and sense cavities; a controller to vary a wavelength of light emitted by the light source and/or an index of refraction of an optical medium of the cavities; a photodetector to detect light emitted by the reference and sense cavities; an interferometer sensor to measure using the detected light, for each variation of the wavelength of light and/or the index of refraction a reference displacement of the reference cavity and a sense displacement of the sense cavity; and a processor to calculate the acceleration using each of the reference displacements and the sense displacements.

10. 发明授权

US10107937B2 Gradiometer configuration invariant to laser phase noise and sensor rotations 有权
公开(公告)号：US10107937B2
公开(公告)日：2018-10-23
申请号：US14975174
申请日：2015-12-18
申请人： AOSense, Inc.
发明人： Mark A. Kasevich , Miroslav Y. Shverdin , Adam T. Black , Todd L. Gustavson
IPC分类号： G01V7/00 , G01V7/14
摘要： A system for gravity measurement includes one or more atom sources, two or more laser beams, and a polarizing beamsplitter and a retro-reflection prism assembly. The one or more atom sources is to provide three ensembles of atoms. The two or more laser beams is to cool or interrogate the three ensembles of atoms. The polarizing beamsplitter and the retro-reflection prism assembly are in a racetrack configuration. The racetrack configuration routes the two or more laser beams in opposing directions around a loop topology, intersecting the three ensembles of atoms with appropriate polarizations chosen for cooling or interferometer interrogation. The three ensembles of atoms are positioned coaxially when interrogated.

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