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公开(公告)号：US10921161B2
公开(公告)日：2021-02-16
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：US20210025734A1
公开(公告)日：2021-01-28
申请号：US16522486
申请日：2019-07-25
申请人： PACCAR Inc
发明人： Jesse Teahon , Daryl Toole , DJ Sutterfield , Brian Holdeman
摘要： A rotary encoder may include a housing having an input-side portion and an output-side portion, and an internal cavity formed therein. The housing and its internal cavity can house a central shaft configured to transfer torque from an output shaft of a motor to an input shaft of a mechanical device such as a winch or a hoist. The housing and its internal cavity can house other components including printed circuit boards, an encoder disc, a ball bearing, and a seal.
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公开(公告)号：US10883854B2
公开(公告)日：2021-01-05
申请号：US15774320
申请日：2016-10-24
申请人： Robert Bosch GmbH
发明人： Ralf Drescher
摘要： A sensor wheel for detecting the rotational position of a camshaft, elevations and depressions being developed along the circumference of the sensor wheel, which respectively form a segment, which may be detected by a sensor sensitive to magnetic fields when the sensor wheel is in motion, the sensor wheel comprising a long elevation, a medium length elevation and a short elevation as well as a long depression, a medium length depression and a short depression, the long elevation being as long as the long depression, the medium length elevation being as long as the medium length depression, the short elevation being as long as the short depression. The ratio of the length of the long elevation to the length of the medium length elevation is the same as the ratio of the length of the medium length elevation to the length of the short elevation.
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公开(公告)号：US20200340834A1
公开(公告)日：2020-10-29
申请号：US16924353
申请日：2020-07-09
申请人： DENSO CORPORATION
摘要： A rotation angle detection device for detecting a rotation angle of a rotating body includes a magnet disposed to rotate together with the rotating body, a magnetic portion provided in a ring shape radially outward of the magnet, a plurality of gaps being formed in the magnetic portion at a plurality of locations along a circumferential direction, and a magnetic detection unit arranged in a particular gap of the plurality of gaps. The magnetic detection unit is located at a detection position, a width of the particular gap in the tangential direction at the detection position is defined as a detection position gap width, a width of the particular gap in the tangential direction at a position radially outward of the detection position is defined as a tangential width, and the tangential width is narrower than the detection position gap width.
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公开(公告)号：US10782366B2
公开(公告)日：2020-09-22
申请号：US15729943
申请日：2017-10-11
发明人： Logan Stewart
摘要： A magnetic field sensor includes a plurality of magnetic field sensing elements operable to generate magnetic field signals indicative of a magnetic field associated with an object, a plurality of channels coupled to receive the magnetic field signals and configured to generate a respective plurality of phase separated channel signals, and an output circuit coupled to receive the plurality of phase separated channel signals and configured to generate a sensor output signal including distinguishable pulses associated with the plurality of phase separated channel signals. The sensor output signal may include a first plurality of pulses associated with a first one of the phase separated channel signals and having a first characteristic and a second plurality of pulses associated with a second one of the phase separated channel signals and having a second characteristic different than the first characteristic, such as different signals levels and/or different pulse widths.
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公开(公告)号：US10768021B2
公开(公告)日：2020-09-08
申请号：US16134729
申请日：2018-09-18
申请人： Yamaha Corporation
发明人： Taku Ueda , Yoshihiro Suzuki , Yoshihiro Natsume
摘要： A position detection device includes a fixed element, a movable element, a plurality of first electrodes, a second electrode, a third electrode and a first detection circuit. The movable element is movable relative to the fixed element. The first electrodes are arranged on either the fixed element or the movable element, and the second electrode is on the other of the movable element or the fixed element. The first electrodes include two or more phases with electrical signals having mutually different phases. The third electrode is provided on the fixed element and opposing the electrode that is on the movable element while the movable element is in a prescribed position. The first detection circuit detects when the movable element is in the prescribed position based on electrical signals generated in the second and third electrodes in accordance with the electrical signals supplied to the first electrodes.
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公开(公告)号：US10759276B2
公开(公告)日：2020-09-01
申请号：US16093741
申请日：2017-06-27
IPC分类号： B60K20/02 , G01B7/30 , G01R33/09 , G01R33/02 , G01D5/14 , H01L43/08 , H01L27/22 , G01D5/245 , H01L43/06
摘要： A magnetic sensor includes a magneto-resistive element, a Hall element, and a detection circuit that receives a signal from the magneto-resistive element and a signal from the Hall element input thereto. The detection circuit includes an output terminal and an interrupt generation unit. The output terminal outputs, to the outside as an output signal, a signal obtained by performing to the signal input from the magneto-resistive element, at least one processing selected from amplification, analog-to-digital conversion, offset correction, and temperature-characteristics correction. The interrupt generation unit outputs an interrupt signal when the signal input from the Hall element is larger than a predetermined threshold. The magnetic sensor is high accurate and highly reliable.
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公开(公告)号：US20200240812A1
公开(公告)日：2020-07-30
申请号：US16746144
申请日：2020-01-17
申请人： Mitutoyo Corporation
发明人： Hiroto Kubozono
摘要： The electromagnetic induction type encoder includes a detection head and a scale each having a substantially flat plate shape. The detection head and the scale are disposed opposed to one another and relatively move in a measurement axis direction. The scale includes a plurality of periodic elements formed of a conductor periodically disposed in the measurement axis direction. The plurality of periodic elements are coupled with a conductor. The detection head includes a transmitting coil wired so as to generate two or more eddy currents in directions opposite to one another in each of the plurality of periodic elements. The detection head includes a receiving coil. The receiving coil is electromagnetically coupled to magnetic fluxes generated by the plurality of periodic elements to detect phases of the magnetic fluxes.
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公开(公告)号：US20200232825A1
公开(公告)日：2020-07-23
申请号：US16839287
申请日：2020-04-03
摘要： A device for sensing the relative rotary position of first and second parts about a rotation axis, the device comprising a follower constrained to move on a first track fast with the first part and on a second track fast with the second part, the first track being linear and the second track comprising a plurality of circular arcs and at least one transition section connecting one of the circular arcs to another, the tracks being arranged so as to convert relative rotation of the parts into linear motion of the follower, wherein the second track is generally spiral, each circular arc is of constant radius about the rotation axis and the first track is perpendicular to the rotation axis.
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公开(公告)号：US10718412B2
公开(公告)日：2020-07-21
申请号：US16085078
申请日：2017-03-24
申请人： NTN CORPORATION
摘要： A sensor target of the present invention is mounted to a movable part (24), which is arranged in parallel with an output shaft (10a) of a motor (10), and is configured to perform a linear motion in a direction parallel to the output shaft (10a). The sensor target includes a magnet (73) and a magnet holder (74) configured to hold the magnet (73). One pair or a plurality of pairs of fitting claws (741) capable of being fitted to an outer peripheral surface of the movable part (24) are formed on the magnet holder (74).
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