公开(公告)号：US11892295B2

公开(公告)日：2024-02-06

申请号：US17644029

申请日：2021-12-13

申请人： NextNav, LLC

发明人： Michael Dormody ,  Ganesh Pattabiraman ,  Abijith Kumar ,  Thomas Wolf ,  Gary Parsons ,  Christian Gates ,  Deepak Joseph ,  Badrinath Nagarajan

IPC分类号： G01C17/38 ,  G01C25/00 ,  G01C5/06 ,  G01C21/16 ,  G01S19/14 ,  G01C21/10 ,  G01S5/02 ,  G01S19/40 ,  G01S5/00

CPC分类号： G01C17/38 ,  G01C5/06 ,  G01C21/10 ,  G01C21/165 ,  G01C25/00 ,  G01C25/005 ,  G01S19/14 ,  G01S5/012 ,  G01S5/017 ,  G01S5/02 ,  G01S19/40

摘要： Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.

公开(公告)号：US11885641B2

公开(公告)日：2024-01-30

申请号：US18110384

申请日：2023-02-16

申请人： NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY

发明人： Yan Shi ,  Dingbang Xiao ,  Kun Lu ,  Xiang Xi ,  Xuezhong Wu ,  Yulie Wu ,  Yongmeng Zhang

IPC分类号： G01C25/00 ,  G01C19/5783

CPC分类号： G01C25/005 ,  G01C19/5783

摘要： An elastically supported electrode substrate for detecting unbalanced mass of a resonant gyroscope includes an outer frame and an inner structure. A connection part configured to be connected to an anchor of a resonator is arranged at the center of the inner structure, and electrodes are distributed on the inner structure. The inner structure is connected inside the outer frame through elastic beams, and the inner structure has torsional and/or translational resonant modes inside the outer frame. The resonant frequency of the inner structure approaches resonant frequency of an operating mode of the resonator. Since the resonant frequency of the elastically supported electrode substrate approaches the resonant frequency of the operating mode of the resonator, the vibration displacement induced by the unbalanced mass of the elastically supported electrode substrate can be significantly magnified to improve the detection sensitivity.

公开(公告)号：USRE49812E1

公开(公告)日：2024-01-23

申请号：US17389406

申请日：2021-07-30

申请人： CASIO COMPUTER CO., LTD.

发明人： Takanori Ishihama

IPC分类号： G01C17/38 ,  G01C19/5776 ,  G01C19/00 ,  G01C21/08 ,  G01C21/16 ,  G01C25/00

CPC分类号： G01C19/5776 ,  G01C17/38 ,  G01C21/08 ,  G01C25/00

摘要： An electronic apparatus includes a magnetic sensor which acquires a status of a magnetic field around the electronic apparatus, an angular velocity sensor, and a processor. The processor controls whether the detection of an angular velocity of a spatial movement of the electronic apparatus is performed by the angular velocity sensor or a magnetic gyro sensor composed of the magnetic sensor, based on the status of the magnetic field acquired by the magnetic sensor.

公开(公告)号：US11874138B2

公开(公告)日：2024-01-16

申请号：US17258642

申请日：2019-08-15

申请人： SONY CORPORATION

发明人： Haruto Takeda ,  Kosei Yamashita ,  Hiroyuki Kamata

IPC分类号： G01D3/08 ,  G01C21/16 ,  G01C25/00 ,  G06F18/25 ,  G06F18/2113

CPC分类号： G01D3/08 ,  G01C21/165 ,  G01C25/005 ,  G06F18/2113 ,  G06F18/251

摘要： An information processing apparatus, an information processing method, and a program, the information processing apparatus and the information processing method appropriately combining observation values of a plurality of sensors according to noise characteristics of the plurality of sensors and a condition for the observation values. An Allan variance is calculated as the characteristics of each of the plurality of sensors. A time window length for an Allan variance is specified as a condition used when the observation values of the plurality of sensors are combined. A weight for each of the plurality of sensors is calculated such that a sum of the Allan variances for the specified time window length is smallest. The respective observation values of the plurality of sensors are combined using a sum of products of the observation values of the plurality of sensors and the weights calculated for each corresponding sensor of the plurality of sensors.

公开(公告)号：US11815568B2

公开(公告)日：2023-11-14

申请号：US17135628

申请日：2020-12-28

申请人： STMicroelectronics, Inc.

发明人： Mahaveer Jain ,  Mahesh Chowdhary

IPC分类号： G01R33/00 ,  G01C25/00

CPC分类号： G01R33/0035 ,  G01C25/005

摘要： An electronic device includes a magnetometer that outputs magnetometer sensor signals and a gyroscope that outputs gyroscope sensor signals. The electronic device includes a magnetometer calibration module that calibrates the magnetometer utilizing the gyroscope sensor signals. The electronic device generates a first magnetometer calibration parameter based on a Kalman filter process. The electronic device generates a second magnetometer calibration parameter based on a least squares estimation process.

公开(公告)号：US20230358540A1

公开(公告)日：2023-11-09

申请号：US18353692

申请日：2023-07-17

申请人： STMICROELECTRONICS S.r.l.

发明人： Luca GUERINONI ,  Luca Giuseppe FALORNI

IPC分类号： G01C19/5712 ,  G01C25/00

CPC分类号： G01C19/5712 ,  G01C25/005

摘要： A microelectromechanical gyroscope includes: the support structure; a sensing mass, coupled to the support structure with degrees of freedom along a driving direction and a sensing direction perpendicular to each other; and a calibration structure facing the sensing mass and separated from the sensing mass by a gap having an average width, the calibration structure being movable with respect to the sensing mass so that displacements of the calibration structure cause variations in the average width of the gap. A calibration actuator controls a relative position of the calibration structure with respect to the sensing mass and the average width of the gap.

公开(公告)号：US11808574B2

公开(公告)日：2023-11-07

申请号：US17700275

申请日：2022-03-21

申请人： STMICROELECTRONICS S.R.L.

发明人： Gabriele Gattere ,  Carlo Valzasina ,  Luca Giuseppe Falorni

IPC分类号： G01C19/5747 ,  G01C19/5712 ,  H01G5/011 ,  G01C25/00 ,  B81C1/00 ,  G01C19/58

CPC分类号： G01C19/5747 ,  B81C1/00158 ,  G01C19/5712 ,  G01C25/00 ,  H01G5/011 ,  G01C19/58 ,  Y10T29/49169

摘要： A multi-axis MEMS gyroscope includes a micromechanical detection structure having a substrate, a driving-mass arrangement, a driven-mass arrangement with a central window, and a sensing-mass arrangement which undergoes sensing movements in the presence of angular velocities about a first horizontal axis and a second horizontal axis. A sensing-electrode arrangement is fixed with respect to the substrate and is set underneath the sensing-mass arrangement. An anchorage assembly is set within the central window for constraining the driven-mass arrangement to the substrate at anchorage elements. The anchorage assembly includes a rigid structure suspended above the substrate that is elastically coupled to the driven mass by elastic connection elements at a central portion, and is coupled to the anchorage elements by elastic decoupling elements at end portions thereof.

公开(公告)号：US20230332925A1

公开(公告)日：2023-10-19

申请号：US18193434

申请日：2023-03-30

申请人： Nuro, Inc.

发明人： Jessica Rose Yox ,  Laszlo-Peter Berczi ,  Chunshang Li ,  Jeremy Wong ,  Cong Li ,  Patrick Pei

IPC分类号： H04N17/00 ,  G06T7/80 ,  G01C21/28 ,  G01C25/00

CPC分类号： G01C25/00 ,  G01C21/28 ,  G06T7/80 ,  H04N17/002 ,  G06T2207/30252

摘要： According to one aspect, a method includes obtaining an assembly, the assembly including at least a first assembly sensor and a second assembly sensor of a plurality of assembly sensors, and calibrating the first assembly sensor and the second assembly sensor. The method also includes calibrating the first assembly sensor and the second assembly sensor together, wherein calibrating the first assembly sensor and second assembly sensor together includes placing the assembly in at least a first pose relative to a plurality of calibration targets. The assembly is coupled on a vehicle, and the plurality of assembly sensors are calibrated after coupling the assembly on the vehicle. Calibrating the plurality of assembly sensors after installing the assembly on the vehicle includes causing the vehicle to move relative to the plurality of calibration targets and using the plurality of assembly sensors to make measurements using the plurality of calibration targets.

公开(公告)号：US20230304799A1

公开(公告)日：2023-09-28

申请号：US18130999

申请日：2023-04-05

申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Bernhard E. Boser ,  Burak Eminoglu

IPC分类号： G01C19/5776 ,  G01C25/00 ,  G01C19/5621

CPC分类号： G01C19/5776 ,  G01C25/005 ,  G01C19/5621

摘要： A precision gyroscope which provides mode matching which is insensitive to rate input in response to continuously monitoring the split between the resonances of the drive and sense modes. A calibration signal, having at least one modulated term whose carrier is synchronous with the excitation in the drive resonator is utilized to modify the feedback signal in the sense resonator. The gyroscope thus does not suffer from corruption of, or from, the rate measurement; whereas the frequency of the calibration signal can be chosen independently of the bandwidth of the rate input.

公开(公告)号：US20230288201A1

公开(公告)日：2023-09-14

申请号：US18120387

申请日：2023-03-11

申请人： LEICA GEOSYSTEMS AG

发明人： Christian NIKLAUS ,  Bianca GORDON

IPC分类号： G01C15/00 ,  G01C25/00

CPC分类号： G01C15/004 ,  G01C25/005

摘要： A survey instrument comprising a single point measurement unit, a point cloud measuring module, and a computing unit. The single point measurement unit is configured to generate first measurement data comprising coordinates a point. The point cloud measuring module has a fixed pose relative to the single point measurement unit, and configured to generate a second measurement data comprising coordinates of a plurality of points. The computing unit stores calibration parameters and is configured to generate a point cloud based on the second measurement data, to merge it with the first measurement data and to detect surfaces and object edges in it. The survey instrument is configured to execute a calibration using object edges in the setting. The single point measurement unit acquires a set of single measuring points including at least two on each flat surfaces of the object edges.