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公开(公告)号：US20240328824A1
公开(公告)日：2024-10-03
申请号：US18434835
申请日：2024-02-07
Inventor： Zhi LI , Yasong GE , Lin ZHAO , Shuquan SUN , Xiao FENG
Abstract: A pose calibration method for an aerospace magnetometer includes the following steps: mounting a magnetometer and a camera on a vehicle body; in the ground state, completely expanding a stretching rod mounted on the vehicle body, and taking photos from multiple angles by the camera in the Earth's full gravity mode; in the near-moon gravity mode, taking photos from multiple angles by the camera; comparing the photos in the Earth's full gravity mode and the near-moon gravity mode to obtain a reference database; and repeating S2 and S3 in an on-orbit state, and comparing the photographing result with the reference database to obtain a length and an angle of the stretching rod. According to the pose calibration method, the photographed structure in the on-orbit state is compared with the reference database to obtain the length and the angle of the stretching rod.
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2.发明授权
公开(公告)号：US12098922B2
公开(公告)日：2024-09-24
申请号：US17600573
申请日：2020-04-03
Applicant: THALES
Inventor： Jacques Coatantiec , Dominique Bouard , Nicolas Vercier
CPC classification number: G01C21/165 , G01C25/00
Abstract: An inertial reference unit includes a first measurement channel that includes a first high-performance inertial measurement unit for measuring specific forces and angular velocities, a first computing unit able to compute pure inertial data based on the measurements of the first measurement unit; a second measurement channel that includes a second inertial measurement unit of performance lower than the first inertial measurement unit for measuring specific forces and angular velocities; a second computing unit able to compute pure inertial data based on the measurements of the second measurement unit; an integrity check function able to implement a method for checking the integrity of the data of the first measurement channel based and the second measurement channel; and a synchronization device for synchronizing the measurements.
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3.发明授权
公开(公告)号：US12044547B1
公开(公告)日：2024-07-23
申请号：US16298410
申请日：2019-03-11
Applicant: Bentley Systems, Incorporated
Inventor： Marc-André Bouvrette , Stéphane Côté
CPC classification number: G01C25/00 , G01C17/00 , G01C21/005 , G01C21/08 , G01C21/16 , G01S5/00 , G01S19/47 , G06F3/011
Abstract: In one embodiment, a technique for providing absolute orientation of a mobile device involves aligning the orientation sensor of the mobile device with the Earth's coordinate system. An initial orientation from the orientation sensor of the mobile device is accessed, a user is prompted to move the mobile device in a direction of the initial orientation, and using a position sensor, a set of position information that describes positions of the mobile device is captured while the mobile device is being moved in the direction. Based on the set of position information, a vector of movement is determined. Using the vector of movement, an orientation difference is calculated between the Earth's coordinate system and a coordinate system of the mobile device. Upon demand, an absolute orientation of the mobile device may be produced by accessing a live orientation from the orientation sensor and adding the orientation difference.
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公开(公告)号：US12038280B2
公开(公告)日：2024-07-16
申请号：US18363329
申请日：2023-08-01
Applicant: NextNav, LLC
Inventor： Michael Dormody , Deepak Joseph , Badrinath Nagarajan , Guiyuan Han , Arun Raghupathy
CPC classification number: G01C17/38 , G01C5/06 , G01C21/10 , G01C21/165 , G01C25/00 , G01C25/005 , G01S5/02 , G01S19/14 , G01S19/40
Abstract: Calibrating a pressure sensor of a mobile device includes determining a first plurality of calibration values for a first plurality of visits to a first revisit zone to which a mobile device repeatedly returns; determining a first relative calibration adjustment value based on the first plurality of calibration values; determining an adjusted absolute calibration value based on i) an absolute calibration value used to calibrate pressure measurements made by a pressure sensor of the mobile device, and ii) the first relative calibration adjustment value; and calibrating pressure measurements made by the pressure sensor of the mobile device using the adjusted absolute calibration value.
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公开(公告)号：US20240230328A9
公开(公告)日：2024-07-11
申请号：US18049075
申请日：2022-10-24
Applicant: Verizon Patent and Licensing Inc.
Inventor： Amir SAGHIR , Mingxing S. LI , Rakesh CHANDWANI , Edward AMOAH
Abstract: A device may receive small cell data associated with a small cell, wherein the small cell data includes small cell location data and a small cell barometric pressure reading. The device may identify a calibration user device connected to the small cell and may receive, from the calibration user device, a user device barometric pressure reading. The device may calibrate, based on the user device barometric pressure reading, the small cell barometric pressure reading to obtain a calibrated small cell barometric pressure reading. The device may identify a reference weather station and may receive, from the reference weather station, weather station data, wherein the weather station data includes a weather station barometric pressure reading, and a weather station altitude that indicates an altitude of the reference weather station. The device may determine a small cell altitude based on the calibrated small cell barometric pressure reading and the weather station data.
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公开(公告)号：US20240230327A1
公开(公告)日：2024-07-11
申请号：US18403224
申请日：2024-01-03
Applicant: MITUTOYO CORPORATION
Inventor： Toshihisa TAKAI , Kentaro TAMURA , Yasushi UESHIMA
Abstract: A non-contact probe includes: a light irradiating section that scans a measurement target object with spot-like laser beam; an image-capturing section that captures an image of the laser beam reflected by the measurement target object by using a plurality of pixel columns selected from a light-reception surface including a plurality of pixel columns, and generates a captured image; a position sensing section that senses an image-formation position of the laser beam on the captured image; and a pixel column changing section that selects a different plurality of pixel columns such that the image-formation position is included in the selected plurality of pixel columns.
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公开(公告)号：US20240210174A1
公开(公告)日：2024-06-27
申请号：US18393460
申请日：2023-12-21
Applicant: Motion Engine Inc.
Inventor： Robert Mark Boysel , Louis Ross
IPC: G01C19/5712 , G01C19/5755 , G01C19/5769 , G01C25/00
CPC classification number: G01C19/5712 , G01C19/5755 , G01C19/5769 , G01C25/00
Abstract: A MEMS motion sensor and its manufacturing method are provided. The sensor includes a MEMS wafer including a proof mass and flexible springs suspending the proof mass and enabling the proof mass to move relative to an outer frame along mutually orthogonal x, y and z axes. The sensor includes top and bottom cap wafers including top and bottom cap electrodes forming capacitors with the proof mass, the electrodes being configured to detect a motion of the proof mass. Electrical contacts are provided on the top cap wafer, some of which are connected to the respective top cap electrodes, while others are connected to the respective bottom cap electrodes by way of insulated conducting pathways, extending along the z axis from one of the respective bottom cap electrodes and upward successively through the bottom cap wafer, the outer frame of the MEMS wafer and the top cap wafer.
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公开(公告)号：US20240193814A1
公开(公告)日：2024-06-13
申请号：US18444938
申请日：2024-02-19
Applicant: BNSF Railway Company
Inventor： Darrell R. Krueger , Garrett Smitley
CPC classification number: G06T7/80 , G01C25/00 , G06T7/97 , G06T2207/30252
Abstract: In one embodiment, a method includes capturing, by a camera of an image capturing module, a first image of a target. The image capturing module and a drum are attached to a fixture and the target is attached to the drum. The method also includes determining a number of lateral pixels in a lateral pitch distance of the image of the target, determining a lateral object pixel size based on the number of lateral pixels, and determining a drum encoder rate based on the lateral object pixel size. The drum encoder rate is programmed into a drum encoder. The method further includes capturing, by the camera, a second image of the target while the target is rotated about an axis of the drum, determining a number of longitudinal pixels in a longitudinal pitch distance of the second image, and comparing the number of lateral pixels to the number of longitudinal pixels.
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公开(公告)号：US12007228B2
公开(公告)日：2024-06-11
申请号：US17520496
申请日：2021-11-05
Applicant: Zoox, Inc.
Inventor： Derek Adams , Ian Baldwin , Bertrand Robert Douillard , Jesse Sol Levinson
IPC: G01B21/16 , G01C21/16 , G01C21/36 , G01C25/00 , G01S7/497 , G01S17/06 , G01S17/87 , G01S17/88 , G01S7/40 , G01S13/06 , G01S13/86
CPC classification number: G01B21/16 , G01C21/1652 , G01C21/1656 , G01C21/3602 , G01C25/00 , G01S7/4972 , G01S17/06 , G01S17/87 , G01S17/88 , G01S7/4026 , G01S13/06 , G01S13/86
Abstract: Perception sensors of a vehicle can be used for various operating functions of the vehicle. A computing device may receive sensor data from the perception sensors, and may calibrate the perception sensors using the sensor data, to enable effective operation of the vehicle. To calibrate the sensors, the computing device may project the sensor data into a voxel space, and determine a voxel score comprising an occupancy score and a residual value for each voxel. The computing device may then adjust an estimated position and/or orientation of the sensors, and associated sensor data, from at least one perception sensor to minimize the voxel score. The computing device may calibrate the sensor using the adjustments corresponding to the minimized voxel score. Additionally, the computing device may be configured to calculate an error in a position associated with the vehicle by calibrating data corresponding to a same point captured at different times.
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公开(公告)号：US12000702B2
公开(公告)日：2024-06-04
申请号：US16226279
申请日：2018-12-19
Applicant: Honeywell International Inc.
Inventor： Ahren Ceisel , Brian Marsh
IPC: G01C19/5776 , E02F9/26 , G01C25/00
CPC classification number: G01C19/5776 , E02F9/26 , G01C25/00
Abstract: Apparatus and associated methods relate to a vehicle attitude estimated as a function of predicted acceleration from the vehicle control system. In an illustrative example, a weighting module may dynamically combine IMU (Inertial Measurement Unit) with sensor motion data motion profile information from the vehicle control system. The weighting module may receive the predicted acceleration information via a data link with the vehicle control system. The dynamic weighting of inputs may be processed by an attitude estimator. An estimated attitude may be supplied to a display device, for example, to represent a real-time spatial orientation of the vehicle with respect to the gravity vector.
