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公开(公告)号：US20190195907A1
公开(公告)日：2019-06-27
申请号：US16229191
申请日：2018-12-21
发明人： Keiichi NOMURA , Tsuyoshi MINAMI
CPC分类号： G01P3/44 , G01C17/28 , G01C17/38 , G01P21/00 , G01R33/0029 , G01R33/0035
摘要： An increase in power consumption involved in calibration for calibrating an offset of a geomagnetism sensor is suppressed. An electronic device performs calibration of an output error of the geomagnetism sensor so that the geomagnetism sensor can output more accurate geomagnetism data based on angular speed data output by a gyro sensor. The electronic device controls turning ON/OFF of the gyro sensor. The electronic device determines whether or not calibration of the geomagnetism sensor is necessary. When it is determined that calibration of the geomagnetism sensor is unnecessary, the electronic device performs a control operation to turn OFF the gyro sensor.
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公开(公告)号：US10215564B2
公开(公告)日：2019-02-26
申请号：US14941497
申请日：2015-11-13
申请人： FLIR Systems, Inc.
发明人： Mark Johnson , Warwick Mills , Chris Yeomans
摘要： Techniques are disclosed for systems and methods to provide automatic and substantially continuous calibration for compasses mounted to moving structures. A compass calibration system may include a logic device configured to receive one or more sensor signals and determine a corrected magnetic field based, at least in part, on a measured local magnetic field. The logic device may be adapted to receive an angular velocity, an acceleration, the measured local magnetic field, and/or a speed of a mobile structure; generate stabilized roll and pitch components of an orientation of the mobile structure based, at least in part, on the acceleration and angular velocity; and determine the corrected magnetic field based, at least in part, on the speed, the local magnetic field, the stabilized roll and pitch components, and/or the angular velocity.
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公开(公告)号：US10209078B2
公开(公告)日：2019-02-19
申请号：US15692135
申请日：2017-08-31
申请人： Yost Labs Inc.
发明人： Paul Yost
摘要： A system, a method and a computer program product are provided for local perturbation immunity in a vector-based sensing device. Measurement data from at least one vector-based sensing device is evaluated at a given time using a heuristic to identify an occurrence of a perturbing event, wherein the at least one vector-based sensing device includes either a magnetometer or an accelerometer, or both the magnetometer and the accelerometer. A time-shifting component is provided to reject the perturbing event for a duration of the perturbing event and use measurement data from a gyroscope to construct vector-based sensing device measurement data unaffected by the perturbing event.
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公开(公告)号：US10165415B2
公开(公告)日：2018-12-25
申请号：US15785660
申请日：2017-10-17
发明人： Sang Su Kim , Young Wn Kwun , Jung Woo Cho , Ho Jun Lee , Young Mi Son
摘要： A method for performing geomagnetic signal processing using a geomagnetic signal processing apparatus is provided. The method includes obtaining a geomagnetic signal based on a geomagnetic sensor output; converting the obtained geomagnetic signal into a high frequency signal having a frequency equal to or higher than a reference frequency using a signal processing filter; extracting abnormal high frequency signal values outside a predetermined critical range from the converted high frequency signal; determining whether a sum of the extracted abnormal high frequency signal values converges into a critical range a preset time window; and correcting the geomagnetic signal based on the determining.
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公开(公告)号：US20180313650A1
公开(公告)日：2018-11-01
申请号：US15956780
申请日：2018-04-19
申请人： RideOn Ltd.
IPC分类号： G01C17/38 , G01R33/26 , G01R33/028
CPC分类号： G01C17/38 , G01R33/028 , G01R33/26
摘要： A system for improving azimuth accuracy of a Line Of Sight (LOS) by adjusting an azimuth value obtained from one or more magnetometer based inertial sensors according to the sun position, comprising one or more magnetometer based inertial sensors, one or more imaging sensors, one or more location sensors and one or more processors coupled to the sensors. The processor(s) is adapted to execute a code comprising code instructions to: obtain location, elevation and time from the location sensor(s), obtain a sensor based azimuth value of a LOS of the imaging sensor(s) from the magnetometer based inertial sensor(s), obtain image(s) depicting the sun captured by the imaging sensor(s), calculate an actual azimuth value of the LOS according to the location, elevation and time with respect to a center of the sun computed by analyzing the image(s) and adjust automatically the sensor based azimuth value according to the actual azimuth value.
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公开(公告)号：US10072956B2
公开(公告)日：2018-09-11
申请号：US14329531
申请日：2014-07-11
发明人： Yuan Zheng , Shang-Hung Lin , William Kerry Keal
CPC分类号： G01D18/00 , G01C17/38 , G01R33/00 , G01R33/0035
摘要： Systems and methods are disclosed for detecting when a magnetic anomaly may impact the quality of data being output by a magnetometer. A plurality of detection algorithms may be performed in parallel on the sensor data. Further, indication of a anomaly from one or a combination of the detection algorithms may cause the magnetometer data to have a reduced contribution in any sensor fusion operation or may be omitted from a sensor fusion operation as desired.
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公开(公告)号：US10048070B2
公开(公告)日：2018-08-14
申请号：US14690189
申请日：2015-04-17
发明人： Karl Keyzer , Kevin D. Vanderwerf
摘要： A navigation system to transition from a stationary alignment filter to an in-motion alignment filter is provided. The system comprises a processing unit configured to implement a stationary alignment Kalman filter (SAKF) in gyrocompass alignment mode to generate state estimates and provide corrections when the object is stationary, and to implement an algorithm to compute a covariance for the SAKF that accounts for uncertainty in the SAKF estimates; wherein the processing unit is further configured to implement a continuous alignment filter (CAF) that generates a secondary solution which remains unaffected by the SAKF corrections during a delay period accommodating a delay between the time of actual motion to the time of detected motion, and to implement an algorithm to compute a covariance for CAF that accounts for the uncertainty in CAF during delay period; and wherein outputs of the CAF and its covariance are communicated to an in-motion alignment filter.
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公开(公告)号：US10041795B2
公开(公告)日：2018-08-07
申请号：US14852465
申请日：2015-09-11
发明人： Tatsuya Sekitsuka
摘要： An electronic device includes a magnetic sensor which detects a magnetic field around the electronic device and outputs magnetic data in accordance with the magnetic field detected by the magnetic sensor, a position acquiring section which acquires position information regarding a geographic position of the electronic device, and a processing unit. The processing unit acquires, from the position acquiring section, specific position information for a specific position of the electronic device when an output vector of the magnetic data is oriented to a magnetic pole direction of the earth, derives a geomagnetic vector at the specific position based on the specific position information, and acquires an offset value based on a comparison between the geomagnetic vector and the output vector.
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公开(公告)号：US10018479B2
公开(公告)日：2018-07-10
申请号：US15210575
申请日：2016-07-14
发明人： Shankar Shastry
CPC分类号： G01C21/3682 , G01C21/20 , G01C21/206 , G01C21/3476 , G01C21/3605 , G01C21/3629 , G01C21/3697 , G06Q30/0241 , G06Q50/30
摘要： Methods and systems for boarding a transportation vehicle are provided. One method includes configuring a passenger assist device (PAD) for use at a location for arriving and departing transportation vehicles by storing location data with maps and amenities information for the location; initializing a location tracking module to prevent unauthorized removal of the PAD from the location by a passenger; selecting a language by the passenger for communication with the PAD, when the passenger does not want to use a default language; retrieving connection and passenger transportation vehicle boarding location from where the passenger boards the vehicle; and presenting directions to the boarding location and information regarding amenities along a route to the boarding location.
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公开(公告)号：US20180164097A1
公开(公告)日：2018-06-14
申请号：US15834182
申请日：2017-12-07
申请人： PGS Geophysical AS
发明人： Mattias Südow
IPC分类号： G01C17/38
摘要： Roll data can be acquired from a magnetometer and an accelerometer of a towed object telemetry unit coupled to a towed object during rolls of the towed object in two or more different headings. The magnetometer can be calibrated based on the roll data. Turn data can be acquired from the magnetometer and the accelerometer during a turn of the towed object from a first heading to a second heading. The magnetometer can be further calibrated based on the turn data.
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