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公开(公告)号：US11422010B2
公开(公告)日：2022-08-23
申请号：US17101270
申请日：2020-11-23
Applicant: MITUTOYO CORPORATION
Inventor： Hiroto Kubozono
Abstract: An electromagnetic induction type encoder includes a detection head and a scale. The detection head has a first transceiver coil to generate magnetic flux with respect to a first track and a second transceiver coil to generate magnetic flux with respect to a second track. The scale has a first plurality of periodical elements with respect to the first track and a second plurality of periodical elements with respect to the second track. The detection head has a receiver coil that continuously extends from the first track to the second track, is electromagnetically coupled with the magnetic flux generated by the first plurality of periodical elements and the magnetic flux generated by the second plurality of periodical elements, and detects a phase of the magnetic flux generated by the first plurality of periodical elements and a phase of the magnetic flux generated by the second plurality of periodical elements.
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公开(公告)号：US20240200984A1
公开(公告)日：2024-06-20
申请号：US18524385
申请日：2023-11-30
Applicant: MITUTOYO CORPORATION
Inventor： Hiroto Kubozono , Kosaku Miyake
IPC: G01D5/20
CPC classification number: G01D5/2053
Abstract: A scale includes a substrate, a plurality of scale patterns that are arranged along a measurement direction with a constant period on a surface of the substrate and are made of conductor, and a plurality of dummy patterns that are provided on at least a part of a region on the surface of the substrate where the plurality of scale patterns are not provided, and are made of the same conductors as the plurality of scale patterns. A diameter of a largest circle that can be formed in each of the plurality of dummy patterns centering on a point in each of the plurality of dummy patterns is ¼ or less of the period of the plurality of scale patterns.
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公开(公告)号：US20210180991A1
公开(公告)日：2021-06-17
申请号：US16953022
申请日：2020-11-19
Applicant: MITUTOYO CORPORATION
Inventor： Hiroto Kubozono
IPC: G01D5/20
Abstract: A scale includes a plurality of conductors that are arrayed in a given interval along a measurement axis, wherein each of the plurality of conductors has projection portions, each of which projects toward each side of the measurement axis, and wherein at least a part of each of the projection portions has a curve projecting in the measurement axis.
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公开(公告)号：US20210190544A1
公开(公告)日：2021-06-24
申请号：US17101270
申请日：2020-11-23
Applicant: MITUTOYO CORPORATION
Inventor： Hiroto Kubozono
Abstract: An electromagnetic induction type encoder includes a detection head and a scale. The detection head has a first transceiver coil to generate magnetic flux with respect to a first track and a second transceiver coil to generate magnetic flux with respect to a second track. The scale has a first plurality of periodical elements with respect to the first track and a second plurality of periodical elements with respect to the second track. The detection head has a receiver coil that continuously extends from the first track to the second track, is electromagnetically coupled with the magnetic flux generated by the first plurality of periodical elements and the magnetic flux generated by the second plurality of periodical elements, and detects a phase of the magnetic flux generated by the first plurality of periodical elements and a phase of the magnetic flux generated by the second plurality of periodical elements.
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Patent Agency Ranking
公开(公告)号：US10704930B2
公开(公告)日：2020-07-07
申请号：US15925858
申请日：2018-03-20
Applicant: Mitutoyo Corporation
Inventor： Hiroto Kubozono
Abstract: Provided is an electromagnetic induction type displacement detection apparatus in which influence of a change in magnetic flux received by a receiving device can be suppressed. An electromagnetic induction type displacement detection apparatus 1 includes a scale including a scale coil and a head 3 relatively moving with respect to the scale. The head 3 includes a transmitting device 4 that generates magnetic flux in the scale coil, and a receiving device 5 that includes a first receiving unit 51 and a second receiving unit 52 each receiving the change in the magnetic flux and in which the first receiving unit 51 and the second receiving unit 52 are arranged to be shifted from each other along a measurement direction. The receiving device 5 includes one end portion 10a and another end portion 10b in which a density of a plurality of receiving coils 500 is made sparse, and a central portion 11 that is positioned between the one end portion 10a and the other end portion 10b and in which the density of the plurality of receiving coils 500 is made dense. The electromagnetic induction type displacement detection apparatus 1 includes the one end portion 10a and the other end portion 10b and the central portion 11, whereby influence of the change in the magnetic flux received by the receiving device 5 can be suppressed.
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公开(公告)号：US11460324B2
公开(公告)日：2022-10-04
申请号：US16953022
申请日：2020-11-19
Applicant: MITUTOYO CORPORATION
Inventor： Hiroto Kubozono
IPC: G01D5/20
Abstract: A scale includes a plurality of conductors that are arrayed in a given interval along a measurement axis, wherein each of the plurality of conductors has projection portions, each of which projects toward each side of the measurement axis, and wherein at least a part of each of the projection portions has a curve projecting in the measurement axis.
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公开(公告)号：US10996077B2
公开(公告)日：2021-05-04
申请号：US16590641
申请日：2019-10-02
Applicant: Mitutoyo Corporation
Inventor： Hiroto Kubozono
IPC: G01D5/20
Abstract: An electromagnetic induction type encoder includes a detection head and a scale. The detection head has a transmitter coil configured to generate magnetic flux. The scale has connection coils that are arrayed in a measurement axis direction, are configured to be electromagnetically coupled with magnetic flux generated by the transmitter coil and generate magnetic flux that fluctuates in a predetermined spatial period in the measurement axis direction. The detection head has a receiver coil having a plurality of coils that are arrayed in the measurement axis direction on a predetermined face of the detection head, are configured to be electromagnetically coupled with the magnetic flux generated by the connection coils and detect a phase of the magnetic flux. A current direction of one of the plurality of coils is opposite to a current direction of another coil of the plurality of coils next to each other.
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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
Applicant: Mitutoyo Corporation
Inventor： Hiroto Kubozono
Abstract: 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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9.发明申请公开(公告)号：US20180274949A1
公开(公告)日：2018-09-27
申请号：US15925858
申请日：2018-03-20
Applicant: Mitutoyo Corporation
Inventor： Hiroto Kubozono
CPC classification number: G01D5/2053 , G01B7/003 , G01D5/206
Abstract: Provided is an electromagnetic induction type displacement detection apparatus in which influence of a change in magnetic flux received by a receiving device can be suppressed. An electromagnetic induction type displacement detection apparatus 1 includes a scale including a scale coil and a head 3 relatively moving with respect to the scale. The head 3 includes a transmitting device 4 that generates magnetic flux in the scale coil, and a receiving device 5 that includes a first receiving unit 51 and a second receiving unit 52 each receiving the change in the magnetic flux and in which the first receiving unit 51 and the second receiving unit 52 are arranged to be shifted from each other along a measurement direction. The receiving device 5 includes one end portion 10a and another end portion 10b in which a density of a plurality of receiving coils 500 is made sparse, and a central portion 11 that is positioned between the one end portion 10a and the other end portion 10b and in which the density of the plurality of receiving coils 500 is made dense. The electromagnetic induction type displacement detection apparatus 1 includes the one end portion 10a and the other end portion 10b and the central portion 11, whereby influence of the change in the magnetic flux received by the receiving device 5 can be suppressed.
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