Shaft Angle Transducers Patents (Class 250/231.13)
  • Patent number: 10288454
    Abstract: An encoder includes a scale having a continuous part where physical characteristics varies and a discontinuous part that interrupts the continuous part, a detector that be relatively displaced with respect to the scale and that detects the physical characteristics of the scale, and a processor that detects an origin of the scale on the basis of a signal for displacement detection output from the detector. The detector includes a sensitive part having sensitivity contributing to the signal for displacement detection and an insensitive part having no sensitivity contributing to the signal for displacement detection. The processor detects the origin on the basis of signal intensity of each of signals for displacement detection that the detector outputs when the sensitive and insensitive parts detect physical characteristics of the discontinuous part.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: May 14, 2019
    Assignee: CANON PRECISION INC.
    Inventor: Ryo Sasaki
  • Patent number: 10281301
    Abstract: An encoder apparatus comprising a scale comprising scale features in at least one track which define a series of incremental scale marks and at least one reference mark and a readhead comprising a light source, a diffraction grating, an incremental photodetector and a reference photodetector comprising at least two detector channels. The features defining the at least one reference mark are configured such that the at least one reference mark as resolvable by each of the at least two detector channels comprises a single feature. The optical arrangement of the encoder is such that a non-imaged representation of at least the track in which the at least one reference mark is contained falls onto the detector.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: May 7, 2019
    Assignee: RENISHAW PLC
    Inventor: Jason Kempton Slack
  • Patent number: 10274343
    Abstract: A rotary encoder includes a rotating shaft, first and second encoder wheels, first and second detectors and a processor. The first encoder wheel includes coaxially disposed first and second portions. The first portion has first graduation features. The second portion has a first positioning structure. The second encoder wheel includes coaxially disposed third and fourth portions. The third portion has second graduation features. The fourth portion has a second positioning structure meshing with the first positioning structure, so that the first graduation features and the second graduation features are staggered, and the first encoder wheel and the second encoder wheel are coaxially mounted on the rotating shaft. The first and second detectors detect the first and second graduation features and output first and second signals, respectively. The processor calculates a rotating angle of the rotating shaft according to the first and second signals.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: April 30, 2019
    Assignee: Avision Inc.
    Inventors: Yen-Cheng Chen, Jan-Hsing Kao
  • Patent number: 10277090
    Abstract: Electric motors are disclosed. The motors are preferably for use in an automated vehicle, although any one or more of a variety of motor uses are suitable. The motors include lift, turntable, and locomotion motors.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: April 30, 2019
    Assignee: Nidec Motor Corporation
    Inventors: William D. Moore, Philip S. Johnson
  • Patent number: 10271913
    Abstract: A surgical tool includes: a treatment section that treats an object to be treated; a power source that generates a power to operate the treatment section; a traction section connected to the treatment section and the power source; a switching section that switches a transmission state of the power from the power source to the traction section between a state in which the power can be transmitted and a state in which the power cannot be transmitted; and a tension-applying section that has a pulley and applies a predetermined initial tension to the traction section by applying a power to the pulley in the state in which the power cannot be transmitted, wherein the traction section is hung on the pulley via the power source from the treatment section and is connected to the treatment section via the power source.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: April 30, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Toshihiro Yoshii, Shuya Jogasaki
  • Patent number: 10267658
    Abstract: An encoder includes: a base member; a printed board fixed directly or indirectly to the base member; and a cover member fixed to the base member while the printed board is arranged inside the cover member. A first enclosed space and a second enclosed space are formed inside the cover member. The first enclosed space is space in which the printed board is arranged entirely or partially in an enclosed state. The second enclosed space is formed between the first enclosed space and the cover member.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: April 23, 2019
    Assignee: FANUC CORPORATION
    Inventors: Miaomiao Wang, Nobuyuki Ootake
  • Patent number: 10265131
    Abstract: A surgical instrument has a treatment section, a first pulling section and a second pulling section configured to transmit a pulling force to the treatment section, a power source configured to generate force for operating the treatment section, and a switching section having a first path configured to transmit the force from the power source to the first pulling member and a second path configured to transmit the force from the power source to the second pulling member and configured to switch the first path and the second path.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: April 23, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Shuya Jogasaki, Toshihiro Yoshii
  • Patent number: 10252425
    Abstract: A robot includes a first member, a second member that is provided to be turnable about a turning axis with respect to the first member, marks that are disposed around the turning axis on a surface of the second member, and a mark detection portion that is disposed in the first member and detects the marks.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: April 9, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Takayuki Kondo, Daiki Tokushima
  • Patent number: 10228320
    Abstract: Target design methods, targets as well as scanner aberration methods and device design improvements are provided. Metrology targets may be designed by identifying at least two geometric elements in a specified device design, and designing corresponding at least two target cells of an overlay metrology target to have structures related to the at least two geometric elements. Non-printed filling elements may be added to target or device designs which exhibit large spaces (e.g., larger than twice the minimal design rule pitch) in order to avoid placement error and other inaccuracies. Scanner aberrations themselves may be measured using corresponding targets as well.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: March 12, 2019
    Assignee: KLA—Tencor Corporation
    Inventors: Vladimir Levinski, Daniel Kandel
  • Patent number: 10215595
    Abstract: An optical encoder for measuring rotation is provided. The optical encoder includes an optical disk having a diffraction grating track and an index track. The index track being disposed radially inward from the diffraction grating track. The diffraction grating track having a plurality of equally spaced lines that create an alternating light/dark pattern. The index track includes a pattern with at least two sequences, the at least two sequences being equally spaced about the diameter of the index track, each of the sequences having at least one mark and each of the sequences having a different number of marks from the other sequences.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: February 26, 2019
    Assignee: FARO TECHNOLOGIES, INC.
    Inventor: Frederick John York
  • Patent number: 10209104
    Abstract: An absolute encoder includes a scale having a sequence of marks, a detector configured to detect a signal corresponding to a plurality of marks of the scale, and a processor configured to obtain an absolute position corresponding to the signal. The processor is configured to select code sequences, from a group of code sequences corresponding to absolute positions, as a candidate group for a code sequence corresponding to the signal, and to select the code sequence corresponding to the signal from the candidate group.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Makiko Ogasawara
  • Patent number: 10207457
    Abstract: A method for bonding components to each other according to this invention bonds, to a plate-shaped member or a shaft, an ultraviolet-curable adhesive cured by irradiation with ultraviolet rays and a wavelength conversion element which emits ultraviolet rays by irradiation with X-rays. The plate-shaped member is brought into contact with the shaft through a bonding layer formed by the ultraviolet-curable adhesive and the wavelength conversion element. The X-rays are transmitted through the plate-shaped member or the shaft to the bonding layer located between the plate-shaped member and the shaft to cure the ultraviolet-curable adhesive.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: February 19, 2019
    Assignee: FANUC CORPORATION
    Inventor: Shunichi Odaka
  • Patent number: 10197421
    Abstract: A device for detecting posture change of a operation part in a camera and a method for restoring posture are disclosed. The device may include a photo interrupter and a photoelectric baffle structure including a plurality of baffle pieces fixed on a base. The baffle pieces may include a first baffle piece and remaining second baffle pieces of a length specification different from that of the first baffle piece, and there is a gap between two adjacent baffle pieces. An output signal from the photo interrupter changes according to the aligning relationship between the photo interrupter and the baffle pieces. One of the photoelectric baffle structure and the photo interrupter may follow the motion of an operation part of the camera while the other one remains unmoved, so that a posture change of the operation part may be detected based on the output signal from the photo interrupter.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: February 5, 2019
    Assignee: Zhejiang Uniview Technologies Co., Ltd
    Inventors: Yong Tao, Bujun Que, Yifei Sun
  • Patent number: 10194060
    Abstract: In one embodiment, a device includes a device body that includes a touch-sensitive display and a processor. The device also includes a band coupled to the device body and an optical sensor in or on the band. The optical sensor faces outward from the band and captures images. The processor communicates with the optical sensor to process captured images.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: January 29, 2019
    Assignee: Samsung Electronics Company, Ltd.
    Inventors: Pranav Mistry, Sajid Sadi, Curtis Douglas Aumiller, Chengyuan Wei
  • Patent number: 10156439
    Abstract: An inspection system is presented. The inspection system comprises a remotely controllable imaging assembly and a scale reticle. The remotely controllable imaging assembly includes a camera and a lens system. The lens system includes a tunable-focus lens and a magnifying lens between the camera and the tunable-focus lens. The scale reticle is positioned within a sight line of the camera of the imaging assembly such that the scale reticle is between the imaging assembly and a target.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: December 18, 2018
    Assignee: The Boeing Company
    Inventors: Christopher W. Fay, Farshad Forouhar, Kevin M. Uhl, Gary Mark Buckus, Eric Sean Kamila, Joshua Charles Modrzynski, John B. Winn
  • Patent number: 10156459
    Abstract: An optical encoder unit includes: a light source having a predetermined light distribution; an optical scale having a polarizer whose polarization direction on a plane is along a predetermined direction, and whose polarization direction is changed according to rotation; and an optical sensor unit including a first photoreceiver, a second photoreceiver, a third photoreceiver, and a fourth photoreceiver for receiving incident light that is light source light from the light source made incident on the respective photoreceivers by passing through or being reflected by the optical scale. An emitting surface of the light source and the optical sensor unit are arranged at positions so as to receive a light intensity that is predetermined times greater or more than that corresponding to dark current of the optical sensor.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: December 18, 2018
    Assignee: NSK LTD.
    Inventor: Toshiaki Oguchi
  • Patent number: 10152798
    Abstract: In accordance with some embodiments, systems, methods and media for determining object motion in three dimensions using speckle images are provided. In some embodiments, a system for three dimensional motion estimation is provided, comprising: a light source; an image sensor; and a hardware processor programmed to: cause the light source to emit light toward the scene; cause the image sensor to capture a first defocused speckle image of the scene at a first time and capture a second defocused speckle image of the scene at a second time; generate a first scaled version of the first defocused image; generate a second scaled version of the first defocused image; compare each of the first defocused image, the first scaled version, and the second scaled version to the second defocused image; and determine axial and lateral motion of the object based on the comparisons.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: December 11, 2018
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Mohit Gupta, Brandon M. Smith, Pratham H. Desai, Vishal R. Agarwal
  • Patent number: 10147834
    Abstract: An electronic device includes a substrate, an optical sensor coupled to the substrate, and an optical emitter coupled to the substrate. A lens is aligned with the optical emitter and includes an upper surface and an encapsulation bleed stop groove around the upper surface. An encapsulation material is coupled to the substrate and includes first and second encapsulation openings therethrough aligned with the optical sensor and the lens, respectively.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: December 4, 2018
    Assignee: STMICROELECTRONICS PTE LTD
    Inventors: Laurent Herard, David Gani
  • Patent number: 10139252
    Abstract: An optical sensor including a light-emitting element, four light-receiving elements facing the light-emitting element, and a substrate at which the light-emitting element and the light-receiving elements are provided. The substrate includes a first portion at which the light-emitting element is provided and a second portion at which the light-receiving elements are provided, the first portion and the second portion being integrated. Respective distances from the four light-receiving elements to one point on a predetermined plane are equal, four line segments that connect the one point and centers of respective light-receiving regions of the four light-receiving elements form right angles with each other, and a normal line of the predetermined plane that passes through the one point passes through an emission point of the light of the light-emitting element or a center of an emission surface of the light of the light-emitting element.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: November 27, 2018
    Assignee: NSK LTD.
    Inventors: Yasuhiro Kawai, Toshiaki Oguchi, Hideki Furukawa, Tomoyuki Yanagisawa, Minoru Kubokawa
  • Patent number: 10126462
    Abstract: The embodiments of the present disclosure provide a proximity sensor, an electronic apparatus and a method for manufacturing a proximity sensor. The proximity sensor comprises a sensor chip, a light-emitting device, a transparent molding material and a non-transparent molding material, wherein the sensor chip comprises a sensor region; the light-emitting device is located on the sensor chip and is electrically coupled to the sensor chip; the transparent molding material at least covers a light-emitting surface of the light-emitting device; and the non-transparent molding material isolates the transparent molding material from the sensor region.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: November 13, 2018
    Assignee: STMICROELECTRONICS PTE LTD
    Inventor: Jing-En Luan
  • Patent number: 10126113
    Abstract: A spectroscope including: a spectral element that is configured to spectrally separate signal light; a first optical system that is configured to condense spectroscopic light spectrally separated by the spectral element; and an optical receiver that is configured to receive the spectroscopic light; wherein the optical receiver includes a plurality of regions different sensitivities with respect to a wavelength characteristics of the spectroscopic light.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: November 13, 2018
    Assignee: NIKON CORPORATION
    Inventors: Ryoichi Sataka, Hisao Osawa
  • Patent number: 10122305
    Abstract: A motor control apparatus which is applied to an actuator provided with a motor and an encoder, and drives the motor is provided. The motor control apparatus comprises: a controller that learns an initial position of a rotor, and also decides an energized phase; and a drive circuit that performs switching operation to energize an energized phase. The controller learns that, in learning the initial position, the initial position of the rotor is a two-phase facing position in which two adjacent salient poles of the rotor face salient poles of two energized phases of a stator, and the initial position of the rotor is a one-phase facing position in which one salient pole of the rotor faces a salient pole of one non-energized phase of the stator.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: November 6, 2018
    Assignee: DENSO CORPORATION
    Inventor: Koji Sakaguchi
  • Patent number: 10113887
    Abstract: A scale and related method for a length-measuring system for recording the absolute values of angles or distances. The scale includes a printed circuit board, at least one track for identifying length information or angle information and a coding for identifying the scale. The coding has at least one coding element comprising at least two electrodes and a conductive connection between the electrodes on an insulator substrate. The electrical connection is configured to be irreversibly destroyed when an electrical current is applied.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: October 30, 2018
    Assignee: Hamilton Bonaduz AG
    Inventors: Hanspeter Romer, Manuel Altmeyer, Martin Rupp
  • Patent number: 10113888
    Abstract: The position detection apparatus includes the first optical position detector used with an optical scale having periodic patterns. The first position detector receives lights from the periodic patterns when moving relatively to the optical scale with a movement of a movable member to generate first detection signals respectively changing at periods corresponding to periods of the periodic patterns. The second non-optical position detector generates a second detection signal changing with the movement of the movable member. The calculator produces a first position signal by using the first detection signals, produces a second position signal whose resolution is different from that of the first position signal, by using the second detection signal, and performs a calculation for combining the first and second position signals together to produce an absolute position signal.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: October 30, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hirofumi Honda, Daisuke Ishikawa, Toshihiko Tomosada
  • Patent number: 10112161
    Abstract: A stirring device for wastewater includes a drive device having a drive shaft extending vertically in the assembled state, a stirring body mounted on the drive shaft, a safety bearing in which a free end of the drive shaft is rotatably held, a slide sleeve is mounted on the free end of the drive shaft, and a device for detecting a state of wear of the slide sleeve. The device for detecting the state of wear includes a sensor mounted on the safety bearing and an evaluation device for evaluating the signals delivered by the sensor.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: October 30, 2018
    Assignee: INVENT UMWELT—UND VERFAHRENSTECHNIK AG
    Inventor: Marcus Hoefken
  • Patent number: 10107650
    Abstract: Systems and methods for measuring the angular position of a laser beam emitter using only distance measurements. What is physically measured is a feature that is affixed to the laser beam emitter and moves with it. Respective distances which are respective functions of the azimuth and zenith angles are measured using respective position encoders. In accordance with some embodiments, the respective distances are measured using linear encoders (optical or magnetic); in accordance with other embodiments, the respective distances are measured using laser interferometer-based encoders.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: October 23, 2018
    Assignee: The Boeing Company
    Inventors: Casey J. Dunn, Navrit P. Singh
  • Patent number: 10082893
    Abstract: Disclosed is a device for entering an input through a rotary motion, including a rotating body, and a fixed body to which the rotating body is coupled and rotates, wherein a first magnetic material and a second magnetic material are disposed on the rotating body and the fixed body, respectively, such that a clicking sensation to the rotation of the rotating body is generated by a magnetic force between the first and second magnetic materials, and an optical sensor and one or more magnetic sensors are disposed on the fixed body such that an amount, a direction, or a speed of rotation of the rotating body is recognized by the optical sensor, and wherein the one or more magnetic sensors detect the magnetic force.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: September 25, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Hee-Young Yun, Junhui Lee, Hyung-Jin Park
  • Patent number: 10081409
    Abstract: A bicycle control apparatus is provided that can improve the stability of the behavior of a bicycle. The bicycle control apparatus includes a controller configured to reduces an output of a motor that assists a manual drive force, upon determining a pitch angle of a bicycle body becomes greater than or equal to a prescribed angle, or based on a state of a suspension that absorbs vibrations of a bicycle, or upon determining a load that is applied to a rear wheel of a bicycle becomes less than a prescribed load.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: September 25, 2018
    Assignee: Shimano Inc.
    Inventors: Tadashi Ichida, Hiroyuki Miyoshi, Etsuyoshi Watarai
  • Patent number: 10072949
    Abstract: An electronic device may include a main body; a rotary member rotatably mounted upon and enclosing at least a portion of the main body, the rotary member including a first region corresponding to a first attribute and a second region corresponding to a second attribute, the first and second regions being alternately arranged on one face of the rotary member; a sensor module configured to acquire attribute information corresponding to at least a partial region of the rotary member as the rotary member is rotated; and a processor, wherein the processor is configured to confirm a change in at least one of the first attribute and the second attribute and to determine at least one of a rotated angle and a rotated direction of the rotary member based on the change.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: September 11, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki-Hun Eom, Tae-Gyun Kim, Hee-Young Yun, Hee-Woong Yoon
  • Patent number: 10060767
    Abstract: An example apparatus is described which comprises a rotary member supported by a bearing. A rotary encoder is registered with respect to the rotary member to rotate therewith and a sensing arrangement is registered with respect to a surface of the bearing. The sensing arrangement is responsive to rotation of the encoder to generate a signal indicative of a rotational characteristic of the rotary member.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: August 28, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Isidoro Maya Agudo, Alberto Borrego Lebrato, Alfons Lobete Camps, David Chanclon
  • Patent number: 10059464
    Abstract: A position sensor system for a landing gear assembly includes a cylinder operatively coupled to an aircraft. Also included is a piston configured to translate within the cylinder. Further included is a pattern disposed on an outer surface of the piston. Yet further included is a scanner operatively coupled to the cylinder and positioned to optically detect the pattern during translation of the piston. Also included is a microprocessor in operative communication with the scanner and configured to receive data from the scanner for conversion to a quantity of movement of the piston relative to the cylinder.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: August 28, 2018
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: Charles W. Clarke
  • Patent number: 10013073
    Abstract: A rotary input device comprising: a bezel portion that includes one or more pressing members; and one or more switch units, wherein each of the switch units is arranged to come in physical contact with any of the pressing members when the bezel portion is rotated, and generate an electrical on/off signal when the switch unit comes in physical contact with any of the pressing members.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: July 3, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Eun Kim, Ki-Young Kwon, Kyung-Hwan Kim, Ji-Hoon Park, Tae-Yoon An, Tae-Won Um, In-Ho Oh, Jae-Woong Choi
  • Patent number: 10001407
    Abstract: An optical detecting device includes a reflecting element, a main body, a light source and a plurality of photosensitive elements. The reflecting element has a reflecting surface. The main body has an installing surface. The installing surface at least partially faces to the reflecting surface. The main body is configured to move along a moving direction relative to the reflecting element. The moving direction is substantially parallel with the reflecting surface. The light source is disposed on the installing surface and is configured to emit a light ray towards the reflecting surface. The photosensitive elements are disposed on the installing surface. Sides of the photosensitive elements close to the light source surround the light source to form a light source region. The light source is at least partially located in the light source region.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: June 19, 2018
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Mang Ou-Yang, Ting-Wei Huang, Hou-Chi Chiang, Zheng-Lin He
  • Patent number: 9995760
    Abstract: A rotational speed measuring device for measuring the rotational speed on coaxially arranged drive shafts is described, wherein a first drive shaft is formed as an inner shaft in a second drive shaft embodied as a hollow shaft. The hollow shaft has at least one opening and a rotational speed encoder which is arranged on the inner shaft and can be detected through the opening of the hollow shaft. A rotational speed sensor is arranged on the outer side of the hollow shaft and is configured to pick up the rotational speed on the rotational speed encoder. A corresponding method for measuring the rotational speed on coaxially arranged drive shafts is also disclosed.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: June 12, 2018
    Assignee: AUDI AG
    Inventor: Hans-Peter Fleischmann
  • Patent number: 9985642
    Abstract: An angle encoder has first and second components rotatable with respect to each other, and an encoder pattern having codewords for indicating the angle between the first and second components. The encoder pattern has a set of base encoder channels coded with a conventional Gray code, and a set of Booster channels for improving the resolution of angle measurement.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: May 29, 2018
    Assignee: ZEROKEY INC.
    Inventors: Matthew William Lowe, Vahid Dehghanian
  • Patent number: 9976878
    Abstract: In a length or position measuring system which has an at least locally substantially linear measuring gauge and at least one sensor to be moved relative to the measuring gauge, wherein the measuring gauge includes an incremental track and at least one absolute track and wherein the incremental track and the at least one absolute track have poles arranged in the longitudinal direction of the measuring gauge, the poles of the at least one absolute track form at least two regions in the sensor with different field strengths or signal amplitudes.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: May 22, 2018
    Assignee: Ballufff GmbH
    Inventors: Thomas Burkhardt, Achim Zern
  • Patent number: 9976874
    Abstract: A magnetic encoder device (3) of the present invention includes a base portion (33) having a mounting surface (33b) for mounting to a rotary shaft (2), a cored bar (35) fitted and fixed over the base portion (33), and a double-row magnetic encoder track (30) formed on the cored bar (35). Through movement of each of magnetic poles of the magnetic encoder track (30) over a region opposed to a magnetic sensor (4), an angle of the rotating rotary shaft is detected. The base portion (33) is formed of a sintered metal, and the mounting surface (33b) is subjected to sizing.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: May 22, 2018
    Assignee: NTN CORPORATION
    Inventors: Toru Takahashi, Tatsuo Nakajima, Hiroyuki Hakamata, Ikuo Uemoto, Shinji Miyazaki, Takuji Harano, Takayuki Oda
  • Patent number: 9976647
    Abstract: A vehicular shift apparatus includes an operation member configured to be put in five shift positions including a home position, a drive position, a reverse position, a drive-side neutral position, and a reverse-side neutral position. Nine sensing elements are provided to sense a magnet moved by movement of the operation member. The home position is allocated with three sensing elements, and each of the remaining four shift positions is allocated with two sensing elements, wherein two of the sensing elements allocate to the home position are shared by other two of the shift positions. The five shift positions and four intermediate positions between respective two adjacent shift positions are determined, based on combination of outputs of the nine sensing elements.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: May 22, 2018
    Assignee: FUJI KIKO CO., LTD.
    Inventor: Koji Onishi
  • Patent number: 9909862
    Abstract: The present disclosure relates to curved arrays of individually addressable light-emitting elements for sweeping out angular ranges. One example device includes a curved optical element. The device may also include a curved array of individually addressable light-emitting elements arranged to emit light towards the curved optical element. A curvature of the curved array is substantially concentric to at least a portion of the circumference of the curved optical element. The curved optical element is arranged to focus light emitted from each individually addressable light-emitting element to produce a substantially linear illumination pattern at a different corresponding scan angle within an angular range. The device may further include a control system operable to sequentially activate the individually addressable light-emitting elements such that the substantially linear illumination pattern sweeps out the angular range.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: March 6, 2018
    Assignee: Google LLC
    Inventors: Sameer Ansari, Roman Lewkow, Jason Holt
  • Patent number: 9874463
    Abstract: In an optical encoder which includes a rotary plate formed with a plurality of slit arrays and a plurality of light receiving parts corresponding to the slit arrays, at least one of the outer edge of a light receiving part located on the outer side of the optical axis X of light emitted from a light emitting part and the inner edge of the light receiving part located on the inner side of the optical axis X is positioned at a greater distance from the optical axis than the edge of the slit array corresponding to the light receiving part.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: January 23, 2018
    Assignee: FANUC CORPORATION
    Inventors: Miaomiao Wang, Nobuyuki Ootake
  • Patent number: 9835480
    Abstract: A multiturn rotary encoder includes: a single-turn unit, including a code carrier that is able to be scanned by a single-turn scanner in order to generate single-turn position signals, and a single-turn evaluation unit for processing the single-turn position signals to form at least one single-turn code word that indicates the absolute position of an input shaft within one revolution; a first multiturn unit dependent on a power supply, including at least a first multiturn code carrier that is able to be scanned by a first multiturn scanner in order to generate first multiturn position signals, and a first multiturn evaluation unit for processing the first multiturn position signals to form a first multiturn code word that indicates the number of revolutions executed by the input shaft; and a second multiturn unit independent of a power supply, including at least a second multiturn code carrier that is able to be scanned by a second multiturn scanner in order to generate second multiturn position signals, and
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: December 5, 2017
    Assignee: DR. JOHANNES HEIDENHAIN GMBH
    Inventor: Martin Von Berg
  • Patent number: 9823096
    Abstract: A code plate of an optical encoder has a nonplanar incident part on a first major surface for transmitting light emitted from a light emitter to the inside of the code plate, and a planar primary reflection part for fully reflecting the transmitted light. The first major surface is also provided with a code pattern part which extends in a ring shape around the rotation axis at a position different from the incident part to switch transmission/non-transmission of the totally reflected light in accordance with a rotation position of the code plate. The code pattern part has nonplanar exit parts which transmit the totally reflected light, and planar secondary reflection parts which again totally reflect the totally reflected light. The secondary reflection parts and exit parts are alternately arranged in the circumferential direction about the rotation axis.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: November 21, 2017
    Assignee: Fanuc Corporation
    Inventor: Akinobu Sakata
  • Patent number: 9773190
    Abstract: The present invention mainly provides a precision calibration method for being applied in a high-precise rotary encoder system, wherein the primary technology feature of the precision calibration method is that: using a laser speckle image capturing module to capture N frames of laser speckle image from an optical position surface of a rotary encoding body, and then using image comparison libraries and particularly-designed mathematical equations to calculate N number of image displacements, so as to eventually calculate N number of primary variation angles and sub variation angles corresponding to the N frames of laser speckle image. Therefore, after the rotary encoding body is rotated by an arbitrary angle, an immediate angle coordinate can be precisely positioned according to the primary variation angles, the secondary variation angles and the N number of image displacements.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: September 26, 2017
    Assignee: NATIONAL CHUNG-SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Yi-Yuh Hwang, Guang-Sheen Liu, Chin-Der Hwang, Wei-Guo Chang, Chih-Ming Liao
  • Patent number: 9767560
    Abstract: The present disclosure illustrates a work mode control method. The work mode control method includes the following steps. First, capturing an image once every capturing interval. Next, determining a shutter time, an average brightness and an image quality in response to the images. The shutter time is associated with a frequency of the optical encoder to capture the images. The average brightness is associated with a brightness of environmental light sensed by the optical encoder. The image quality is associated with clarity of the images. Then, adjusting a work mode of the optical encoder in response to the shutter time, the average brightness and the image quality. Finally, controlling the optical encoder to enter a rest mode when the shutter time is higher than a first threshold, the average brightness is higher than a second threshold, and the image quality is lower than a third threshold.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: September 19, 2017
    Assignee: PIXART IMAGING (PENANG) SDN. BHD.
    Inventor: Siew-Chin Lee
  • Patent number: 9759584
    Abstract: In a scale, a reference detection pattern and a displacement detection pattern are formed. A detection head outputs a reference detection signal, a phase compensation signal, and a displacement detection signal. A signal processing unit generates a reference signal by amplifying one or both of the phase compensation signal and the reference detection signal and adding up them, and detects a position of the detection head relative to the scale. A combined light receiving grating includes a reference detection light receiving grating and a phase compensation light receiving grating disposed so as to be shifted from the reference detection light receiving grating in the measurement direction. A combined light receiving element includes a reference detection light receiving element configured to output the reference detection signal and a phase compensation light receiving element configured to output the phase compensation signal.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: September 12, 2017
    Assignee: MITUTOYO CORPORATION
    Inventor: Yoshiaki Kato
  • Patent number: 9733069
    Abstract: An optical position-measuring device for detecting the position of two objects movable relative to each other includes a measuring standard that is joined to one of the two objects and has a measuring graduation having a periodic arrangement of graduation regions along at least a first graduation direction. The position-measuring device also includes a scanning unit having a plurality of optical elements, which is disposed in a manner allowing movement relative to the measuring standard. Via the arrangement and formation of the optical elements of the scanning unit, a scanning beam path results in which partial beams of rays reaching interference propagate in mirror symmetry in relation to a plane of symmetry and either fall in V-shaped fashion on the measuring standard and/or are reflected back in a V-shape by the measuring standard.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: August 15, 2017
    Assignee: DR. JOHANNES HEIDENHAIN GMBH
    Inventor: Wolfgang Holzapfel
  • Patent number: 9712180
    Abstract: An angle encoder has first and second components rotatable with respect to each other, and an encoder pattern having codewords for indicating the angle between the first and second components. The encoder pattern has a set of base encoder channels coded with a conventional Gray code, and a set of Booster channels for improving the resolution of angle measurement.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: July 18, 2017
    Assignee: ZEROKEY INC.
    Inventors: Matthew William Lowe, Vahid Dehghanian
  • Patent number: 9689715
    Abstract: A light source array used in illumination portions for optical encoders comprising an illumination portion, a scale grating extending along a measuring direction and receiving light from the illumination portion, and a detector configuration. The light source array comprises individual sources arranged in a grid pattern and coinciding with two transverse sets of parallel grid pattern lines that have two different grid line pitches between their parallel lines. Different instances of the light source array may be mounted with different rotational orientations about an axis normal to the grid pattern, for use in different illumination portions adapted for use with respective scale gratings having different grating pitches along the measuring axis direction. By using the different respective rotational orientations, the individual sources are aligned along respective illumination source lines that are spaced apart by different respective illumination source line pitches along the measuring axis direction.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: June 27, 2017
    Assignee: Mitutoyo Corporation
    Inventors: Brynn Kristen Hickman MacCoy, Casey Edward Emtman, Daniel John Kapner
  • Patent number: 9664537
    Abstract: In one embodiment, an encoder system comprising an encoder assembly and an encoder alignment structure is disclosed. The encoder assembly may include at least a detector, a hub, a housing, an index sensor of the detector, and a coding member having an index mark. The encoder alignment structure may have a projecting structure. The detector may be coupled with the housing, and the projecting structure may slideably engage the hub so as to align the index mark of the coding member with the index sensor of the detector in a first alignment arrangement. In another embodiment, an encoder assembly configured for receiving an alignment structure having a projecting structure is disclosed.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: May 30, 2017
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.
    Inventors: Kek Leong Yap, Siow Ming Tan, Cheng Kwong Cheang
  • Patent number: 9658049
    Abstract: A sensor head for an encoder assembly includes a housing and at least two detectors. The sensor head is intended for scanning directly toward a rotatable encoding member positioned on a carrier ring. The carrier ring is intended to be installed on a shaft of a machine. The detectors are arranged on detector strips are displaceably attached to the housing.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: May 23, 2017
    Assignee: LEINE & LINDE AB
    Inventors: Richard Arnstein, Magnus Larsson