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公开(公告)号：US10060743B2
公开(公告)日：2018-08-28
申请号：US15219993
申请日：2016-07-26
发明人： Dong Yoon Kim , Byung Ki Kim , Seung Hwan Park , Hyung Sik Shin , Kyoung Suck Ki , Jo An Na , Young Joon Kim , Yeon Soo Choi
CPC分类号： G01C17/38
摘要： A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate, an estimate gain vector, and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value includes acquiring a kth output value of the geomagnetic sensor, calculating a kth estimate gain vector based on a k−1th estimate error co-variance and the kth output value, calculating a kth state estimate based on the calculated kth estimate gain vector and the kth output value and a k−1th state estimate, calculating the kth estimate error co-variance using the kth estimate gain vector and a k−1th estimate error co-variance, and correcting the output value of the geomagnetic sensor based on the kth state estimate, wherein k is a natural number larger than 1.
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公开(公告)号：US20220155102A1
公开(公告)日：2022-05-19
申请号：US17522432
申请日：2021-11-09
发明人： Eun Joong KIM
摘要： Disclosed is a contactless magnetic sensing system. Proposed is a sensing system in which multiple magnetic sensors are disposed at the center of a rotating magnet and rotation angles of the magnetic sensors disposed around a center point at intervals of an angle of 90 degrees can be extracted.
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公开(公告)号：US10655985B2
公开(公告)日：2020-05-19
申请号：US16204629
申请日：2018-11-29
发明人： Dong Yoon Kim , Seong Min Choe , Eun Joong Kim , Joon Yul Yun
IPC分类号： G01B7/14 , G01B7/30 , G01R33/06 , H01L43/06 , G01D5/14 , G01D11/24 , G01D5/12 , G01R33/07 , G01R33/09
摘要： A rotation angle detecting method includes detecting a first rotation angle based on a first measured magnetic value received from a first hall element, detecting a first magnetic value received from a second hall element corresponding to the first detected rotation angle, adjusting a gain based on a first difference value between a second measured magnetic value received from the second hall element, in response to one of the magnetic pieces being rotated at the first rotation angle, and the first magnetic value, redetecting a second rotation angle by applying the gain to the first magnetic value and redetecting a second magnetic value received from the second hall element, corresponding to the second rotation angle, and outputting the second rotation angle as a confirmed rotation angle in response to a second difference value between the second magnetic value and the second measured magnetic value becoming less than a delta value.
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公开(公告)号：US10557723B2
公开(公告)日：2020-02-11
申请号：US15596565
申请日：2017-05-16
发明人： Hae Jung Lee , Kyoung Suck Ki
IPC分类号： G01D5/14
摘要： An apparatus for detecting an angle of rotation includes a rotatable member situated in a first plane and rotatable to be switched between a reference state and rotated states, the rotatable member being unrotated in the reference state, magnet pieces arranged on the rotatable member along a circumferential direction of the rotatable member at intervals of an angle, the magnet pieces moving along a first locus as the rotatable member is rotated, a Hall sensor lying in a second plane spaced a distance apart from the first plane and positioned along a second locus, said second locus being a projection of the first locus into the second plane, and the Hall sensor providing an output varying as the rotatable member is rotated, and a processor configured to detect an angle of rotation of the rotatable member in response to the output from the Hall sensor.
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5.发明申请公开(公告)号：US20180356227A1
公开(公告)日：2018-12-13
申请号：US15984923
申请日：2018-05-21
发明人： Dong Yoon KIM , Seong Min CHOE , Chel Ho CHUNG
IPC分类号： G01C19/5776 , G05B19/408 , G05B19/401
摘要： A processor-implemented method based on an acceleration sensor and a geomagnetic sensor for determining an angular velocity of an object includes: deriving a state variable and a variance of the state variable based on an error quaternion and converting a quaternion-based rotation matrix into an error quaternion-based rotation matrix; calculating an observation matrix and an output matrix of the Kalman filter based on the error quaternion-based rotation matrix; calculating a gain of the Kalman filter based on the transferred variance of the state variable and the observation matrix of the Kalman filter after transferring the state variable and the variance of the state variable through a discretized transfer matrix; calculating a quaternion-based on a calibrated state variable and an estimated quaternion after calibrating the state variable and the variance of the state variable through the gain of the Kalman filter; and calculating angular velocity based on the quaternion.
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公开(公告)号：US20240072787A1
公开(公告)日：2024-02-29
申请号：US18105063
申请日：2023-02-02
发明人： Tae Woo OH , Sung Keun LEE
IPC分类号： H03K17/082 , H03K5/24
CPC分类号： H03K17/082 , H03K5/24
摘要： Disclosed are a circuit and a system which is capable of improving reliability by preventing destructive overvoltage that occurs in an element using a low power supply voltage when various signals are transmitted from an integrated circuit with a high power supply voltage to an integrated circuit with a low power supply voltage.
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公开(公告)号：US11172141B2
公开(公告)日：2021-11-09
申请号：US16864742
申请日：2020-05-01
发明人： Yeon Kyu Kim , Yong Ho Nam , Hyun Il Chang , Seong Min Choe
摘要： Disclosed are a method and apparatus for composing a plurality of images of the celestial bodies. The method and apparatus can compose a plurality of images using various pieces of information associated with the plurality of images and a time interval during the plurality of images are taken, such that objects are accurately matched with no afterimage.
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公开(公告)号：US10288642B2
公开(公告)日：2019-05-14
申请号：US15064837
申请日：2016-03-09
发明人： Dong Ho Kim , Sang Kyung Kim
IPC分类号： G06D1/00 , G01P15/105 , G01P15/18
摘要： According to one embodiment, a physical quantity measuring apparatus includes a signal measurer configured to include sensors configured to measure component values of two axes from among component values of three axes including an X(Hx), a Y(Hy) and a Z(Hz) measured component value of a physical quantity to be measured, a sensor controller configured to select one from among the sensors to be controlled to output a measured value from the selected sensor, an A/D transformer configured to transform an outputted signal selected by the sensor control unit into a digital signal, and a signal processor configured to receive the digital signal from the A/D transformer and to combine the received digital signal with other received digital signals to calculate X, Y and Z component values of the physical quantity.
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公开(公告)号：US20180149495A1
公开(公告)日：2018-05-31
申请号：US15596565
申请日：2017-05-16
发明人： Hae Jung LEE , Kyoung Suck KI
IPC分类号： G01D5/14
CPC分类号： G01D5/145
摘要： An apparatus for detecting an angle of rotation includes a rotatable member situated in a first plane and rotatable to be switched between a reference state and rotated states, the rotatable member being unrotated in the reference state, magnet pieces arranged on the rotatable member along a circumferential direction of the rotatable member at intervals of an angle, the magnet pieces moving along a first locus as the rotatable member is rotated, a Hall sensor lying in a second plane spaced a distance apart from the first plane and positioned along a second locus, said second locus being a projection of the first locus into the second plane, and the Hall sensor providing an output varying as the rotatable member is rotated, and a processor configured to detect an angle of rotation of the rotatable member in response to the output from the Hall sensor.
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10.发明授权公开(公告)号：US09921274B2
公开(公告)日：2018-03-20
申请号：US14534547
申请日：2014-11-06
发明人： Eun Joong Kim , Seong Min Choe
CPC分类号： G01R33/0094 , G01D5/145 , G01R33/072 , G01R33/10
摘要： Provided are a sensing apparatus using a plurality of Hall sensors and an apparatus using the sensing apparatus. The sensing apparatus is configured to measure an intensity of a magnetic field with respect to a magnetic element by using a plurality of Hall sensors and to identify a body that includes the magnetic element.
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