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公开(公告)号：US20200173813A1
公开(公告)日：2020-06-04
申请号：US16208914
申请日：2018-12-04
IPC分类号： G01D5/245
摘要： A differential angle sensor for measuring a differential angle between an input shaft and an output shaft includes a target assembly fixed to rotate with one of the shafts and a ring magnet with equidistantly spaced magnet segments fixed to rotate with the other one of the shafts. The target assembly includes four identical targets extending about the common axis parallel and axially spaced apart from one another, and each having a plurality of wedge-shaped teeth extending radially toward the ring magnet. A first magnetic field sensor is disposed between first and second targets for measuring a first magnetic field strength therebetween. A second magnetic field sensor is disposed between third and fourth targets for measuring a second magnetic field strength. The targets are all circumferentially offset relative to one another such that the magnetic field strengths each vary with the differential angle between the shafts and differently from one-another.
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公开(公告)号：US10648874B1
公开(公告)日：2020-05-12
申请号：US16690302
申请日：2019-11-21
申请人： JTEKT CORPORATION
发明人： Mahito Shiba
摘要： A rotary device includes a stationary member, a rotary member, a sensor device including a sensor rotor, a first sensor, and a second sensor, and a processing device. The first sensor is configured to output a waveform signal that is delayed in phase when the rotary member is displaced relative to the stationary member. The second sensor is configured to output a waveform signal that is advanced in phase when the rotary member is displaced relative to the stationary member. The processing device is configured to calculate a displacement of the sensor rotor based on a difference between a first rotation angle and a second rotation angle, to correct the calculated displacement, and to calculate a load acting on the rotary device from the corrected displacement.
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公开(公告)号：US10578463B2
公开(公告)日：2020-03-03
申请号：US15384024
申请日：2016-12-19
发明人： Karl Courtel
摘要： Systems and methods for processing sensor information obtained from a coding wheel of a motor may detect defects in the sensor information caused by contamination or damage of any of the angular step markers, index marker, and/or blank space on the tracks of the coding wheel. A step counter counts toward an overflow value representing the number of angular step markers on the coding wheel. The step counter and the index are correlated: when the overflow value is reached, if the index marker is not detected an error is raised; coincidently, when the index marker is detected, if the step counter has not reached the overflow value an error is raised. The systems and methods may be applied to bidirectionally rotating motors and other devices by detecting a change in rotational direction and switching from incrementing the angular step counter to decrementing it, and vice versa.
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公开(公告)号：US20200064161A1
公开(公告)日：2020-02-27
申请号：US16545383
申请日：2019-08-20
申请人： FANUC CORPORATION
发明人： Hirosato Yoshida , Nobuyuki Ootake
摘要： An encoder includes: a shaft configured to rotate together with an object to be measured; a rotating member provided on one end side of the shaft and having a pattern formed thereon to detect change of the rotation angle of the shaft; a circuit board arranged to face the rotating member and configured to measure displacement of the rotating member; a magnet configured to rotate together with the shaft; and a power generation element configured to generate electricity by rotation of the magnet. The magnet is arranged so as to pass through a through hole formed in the rotating member; and the power generation element is arranged on a surface of the circuit board that is opposite to a surface thereof facing the rotating member.
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公开(公告)号：US20200003585A1
公开(公告)日：2020-01-02
申请号：US16489907
申请日：2018-03-01
申请人： SONY CORPORATION
发明人： Tetsuya NARITA
摘要： There is provided a position detection device to suppress an influence of a signal distortion due to a processing error, an assembly error of a sensor, or the like. The position detection device includes: a waveform correction unit that corrects waveforms of a first signal and a second signal, the first signal being detected from a first track provided on a moving body and having a scale of predetermined cycles, and the second signal being detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles; and a position calculation unit that calculates a position of the moving body on the basis of the corrected first signal and second signal.
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公开(公告)号：US20190390983A1
公开(公告)日：2019-12-26
申请号：US16453321
申请日：2019-06-26
IPC分类号： G01D5/245
摘要： A position sensor system comprising: a magnetic field generator movable relative to two sensor devices or vice versa. The system has at least one processor adapted with a special algorithm for determining a position of the magnetic field generator in a manner which is highly robust against a disturbance field. A method for determining the position of the magnetic field generator based on a set of equations, in particular a set of linear equations which allows to completely eliminate the external disturbance field.
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公开(公告)号：US10466076B2
公开(公告)日：2019-11-05
申请号：US15550225
申请日：2016-02-11
IPC分类号： G01D5/245
摘要： The invention relates to a sensor device (100) having an incremental sensor unit (40, 40′, 40″) for a shaft rotatable about a rotational axis, in particular for a steering shaft of a motor vehicle, wherein the incremental sensor unit (40, 40′, 40″) is designed to acquire at least one defined rotational angle position of the shaft. The incremental sensor unit (40, 40′, 40″) comprises a transmitting element (41, 41″) and a housing-fixed receiving element (42), wherein a signal (MInk_planar) emitted by the transmitting element (41, 41″) and transmitted along a signal path is receivable by the receiving element (42) and it is recognizable on the basis of the signal (MInk_planar) received by the receiving element (42) whether the shaft is located in the defined rotational angle position (δdef) or not. If the shaft reaches the defined rotational angle position (δdef), a signal pulse can be generated. In this case, the transmitting element (41, 41″) is also arranged fixed on the housing, wherein a change of the signal (MInk_planar) can be caused by a rotational movement of the shaft. Furthermore, the invention relates to a motor vehicle having a sensor device (100).
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公开(公告)号：US10462542B2
公开(公告)日：2019-10-29
申请号：US16076417
申请日：2016-02-09
申请人： Balluff GmbH
发明人： Thomas Burkhardt , Ralph Bauer
摘要： In order to transmit data from an absolute position measurement system to an incremental interface, the transmission of an absolute position is carried out in a virtual reference journey of a position counter (cnt) via several phase-shifted electrical signals. During the virtual reference journey, at least one further information is transmitted in addition to the absolute position. For this purpose, a correspondingly designed absolute measurement system and a computing device are used, the computing device being designed to receive and evaluate data via an incremental interface.
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公开(公告)号：US20190323862A1
公开(公告)日：2019-10-24
申请号：US15955970
申请日：2018-04-18
发明人： Ching Fen Kao , Chia Jung Chang
IPC分类号： G01D5/347 , H01L27/146 , G01D5/245 , G01D5/244
摘要： A sensing chip structure of an optical scale reader includes a substrate having at least one conductive pad. The substrate has thereon a photosensitive chip. The photosensitive chip has at least one pin. The pins are each connected to a conductive pad by a conducting wire. A coded graphic layer is disposed on a side of the photosensitive chip, and the side of the photosensitive chip faces away from the substrate. The sensing chip structure is conducive to structural simplification and miniaturization of the optical scale reader.
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公开(公告)号：US20190301898A1
公开(公告)日：2019-10-03
申请号：US16306643
申请日：2016-06-10
IPC分类号： G01D5/245 , H02K11/215
摘要： A hollow type rotation detecting device has a 2-pole magnet ring and a multi-pole gear, the 2-pole magnet being coaxially fixed to the outer circumferential surface of the shaft end part of a hollow motor shaft that extends coaxially inside a cylindrical cover. In an annular gap between the cylindrical cover and the 2-pole magnet ring and multi-pole gear, rigid boards are arranged with an orientation facing in a tangential direction at prescribed intervals along the circumferential direction. The rigid boards are electrically connected to one another by flexible printed wiring boards. It is possible to obtain a rotation detecting device suitable to be incorporated into the narrow annular gap between a motor house and the shaft end part of the hollow motor shaft in a hollow motor having a large hollow diameter.
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