Patents Assigned to Meidensha Corporation
  • Patent number: 10994968
    Abstract: An elevator rope elongation measuring device provided with: a camera for photographing one or a plurality of elevator ropes R; and an image processing unit for image processing a photographed image output from the camera, wherein: the image processing unit detects an external form portion of the elevator rope R as a regular hill and valley shape T, converts a cyclic length of the hill and valley shape into actual dimensions and makes this a measured value, and finds a ratio of the measured value with respect to a standard value prescribed for the elevator rope as an elongation, therefore attaining the effect of making it unnecessary to have a preliminary installation of a sensor or marker to the rope, or preliminary creation of a database.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: May 4, 2021
    Assignees: OTIS ELEVATOR COMPANY, MEIDENSHA CORPORATION
    Inventors: Mitsuru Kato, Hideki Miyazawa, Yoshiki Nota, Yusuke Watabe
  • Publication number: 20210119505
    Abstract: A permanent magnet rotating electric machine is provided with: a magnet portion comprising a plurality of permanent magnets forming a plurality of sets each of which is attached annularly and which are disposed along an axial direction of a rotor; and a plurality of anti-scattering rings press-fitted along the axial direction around the outer circumference of the magnet portion forming the plurality of sets. The anti-scattering rings each have: an insulation coating provided on both side surfaces contacting adjacent, other anti-scattering rings; a chamfer provided between the outer circumferential surface and one side surface; and an insulation coating provided on the chamfer.
    Type: Application
    Filed: November 27, 2017
    Publication date: April 22, 2021
    Applicant: MEIDENSHA CORPORATION
    Inventors: Takahiro SHIMIZU, Yosuke ARAI, Kenji KAWAKUBO
  • Patent number: 10985672
    Abstract: An inverter device includes: three phase sections each including multiple single-phase output inverter cells connected in series, wherein each inverter cell receives input of alternating current power via a transformer; a neutral point to which an end of the series connection of each phase section is connected; current sensors each disposed at a line between the neutral point and a neutral-point-side inverter cell of the corresponding phase section; a transformer board containing the transformer; an inverter board containing the inverter cells, and being adjacent to the transformer board; and an output board containing a controller, wherein the output board includes a three-phase output terminal connected to a load, and is adjacent to the inverter board. Each line from the neutral-point-side inverter cell to the neutral point includes a part diverted from the inverter board into the output board, wherein each current sensor is arranged in the output board.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: April 20, 2021
    Assignee: MEIDENSHA CORPORATION
    Inventor: Yasumasa Miyamoto
  • Patent number: 10978293
    Abstract: Disclosed is an oxide film formation method that includes supplying an ozone gas having an ozone concentration of 20 to 100 vol %, an unsaturated hydrocarbon gas and a raw material gas to a workpiece (7) placed in a pressure-reduced treatment furnace (5), whereby an oxide film is formed on a surface of the workpiece (7) by a chemical vapor deposition process. An example of the unsaturated hydrocarbon gas is an ethylene gas. An example of the raw material gas is a TEOS gas. The flow rate of the ozone gas is preferably set equal to or more than twice the total flow rate of the unsaturated hydrocarbon gas and the raw material gas. By this oxide film formation method, the oxide film is formed on the workpiece (7) at a high deposition rate even under low-temperature conditions of 200° C. or lower.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: April 13, 2021
    Assignee: MEIDENSHA CORPORATION
    Inventors: Naoto Kameda, Toshinori Miura
  • Patent number: 10948383
    Abstract: This method for controlling an engine bench system is provided with: a speed control step in which speed control of a dynamometer is executed while an engine is maintained in a non-ignition state, and in which the speed control is ended when the rotational speed of the dynamometer has increased to a prescribed speed; a measuring step in which a shaft torque detection signal is acquired during a period from when, as a result of inertia, the rotational speed of the dynamometer is a prescribed measuring start speed until said rotational speed reaches a prescribed measuring end speed; a frequency analyzing step in which the frequency of the signal having the strongest intensity, from among the shaft torque detection signals acquired in the measuring step, is acquired as a resonant frequency; a design step in which a control gain of a dynamometer control device is determined using the acquired resonant frequency.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: March 16, 2021
    Assignee: Meidensha Corporation
    Inventor: Takao Akiyama
  • Patent number: 10940440
    Abstract: There is provided a film separation device 1 equipped with a treatment tank 2 receiving a liquid to be treated, a film unit 3 to be immersed in the liquid to be treated, and a guide mechanism 4. The guide mechanism 4 is composed of holding sections 14 and a guide section 15. The holding sections 14 are provided on a side section of a film cassette 5 constituting the film unit 3, and the guide section 15 is fixed to the treatment tank 2. The guide section 15 has a tank-wall fixed section 15a, an upper extension section 15b, a held section 15c, a lower extension section 15d, and a tank-bottom fixed section 15e. When fixing the film unit 3 to the treatment tank 2, the holding sections 14 are fitted to the held section 15c, thereby guiding the film unit 3 to a predetermined position in the treatment tank 2.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: March 9, 2021
    Assignee: MEIDENSHA CORPORATION
    Inventors: Taichi Narita, Shigeo Ishimoto
  • Patent number: 10942091
    Abstract: A control device of a dynamometer system is provided with: a driving force observer which estimates a generated driving force of a vehicle; an electrical inertia control unit which uses the driving force to generate a front wheel basic torque command signal and a rear wheel basic torque command signal; a synchronization control unit which generates a synchronization control torque command signal with respect to the basic torque command signal and the basic torque command signal in such a way as to eliminate a speed difference; and torque command signal generating units which use the synchronization control torque command signal to adjust the basic torque command signal and the basic torque command signal. The synchronization control unit is defined in such a way that the poles of a denominator polynomial of a transfer function from the driving force to the speed difference are all negative real numbers.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: March 9, 2021
    Assignee: MEIDENSHA CORPORATION
    Inventors: Takao Akiyama, Tomoaki Kimura
  • Patent number: 10928278
    Abstract: A vehicle restraint apparatus is for restraining a vehicle 1 on one or more rollers 7 of a vehicle test system. The vehicle restraint apparatus 11 includes a pair of vehicle restraining jigs whose first ends are joined with left and right seatbelt fixing pillars 2 of the vehicle 1, respectively, and whose second ends are joined with left and right poles 10 on a floor, respectively.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: February 23, 2021
    Assignee: MEIDENSHA CORPORATION
    Inventors: Toshimichi Takahashi, Masao Furusawa
  • Patent number: 10910184
    Abstract: In case of using multi-contacts or flat braided wires for constituting a current carrying structure of a movable part in a vacuum relay, problems tend to appear, which are enlargement of a control mechanism, complication, increased operation force and the like. The vacuum relay 1 includes an insulating cylinder 2, a first relay connecting portion 4 that is connected to one open end of the insulating cylinder 2 and has on its inner surface a first contact 3, a second relay connecting portion 5 that is arranged in the insulating cylinder 2 to face the first relay connecting portion 4, a movable member 7 that is movably arranged between the first and second relay connecting portions 4 and 5 and has a second contact that is brought into contact with the first contact when the movable member is moved toward the first relay connecting portion, and a control mechanism 8 that moves the movable member 7 in both directions to establish and break the contact between the two contacts.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: February 2, 2021
    Assignee: MEIDENSHA CORPORATION
    Inventors: Daizo Takahashi, Toshimasa Fukai, Masahiko Ieda
  • Publication number: 20210028011
    Abstract: Disclosed is an oxide film formation method that includes supplying an ozone gas having an ozone concentration of 20 to 100 vol %, an unsaturated hydrocarbon gas and a raw material gas to a workpiece (7) placed in a pressure-reduced treatment furnace (5), whereby an oxide film is formed on a surface of the workpiece (7) by a chemical vapor deposition process. An example of the unsaturated hydrocarbon gas is an ethylene gas. An example of the raw material gas is a TEOS gas. The flow rate of the ozone gas is preferably set equal to or more than twice the total flow rate of the unsaturated hydrocarbon gas and the raw material gas. By this oxide film formation method, the oxide film is formed on the workpiece (7) at a high deposition rate even under low-temperature conditions of 200° C. or lower.
    Type: Application
    Filed: November 28, 2018
    Publication date: January 28, 2021
    Applicant: MEIDENSHA CORPORATION
    Inventors: Naoto KAMEDA, Toshinori MIURA
  • Publication number: 20210018399
    Abstract: A safety fence for a vehicle testing device includes a fixed fence part, a slide fence part, a first angled fence part, and a second angled fence part. The fixed fence part is structured to be arranged substantially in parallel with a wheel of a test vehicle, wherein the test vehicle is placed on a roller exposed through a roller opening of a pit cover. The slide fence part is arranged in parallel with the fixed fence part, and structured to move in a longitudinal direction of the test vehicle. The first angled fence part is attached to an end portion of the fixed fence part, and structured to swing inwardly and outwardly of the fixed fence part. The second angled fence part is attached to an end portion of the slide fence part, and structured to swing inwardly and outwardly of the slide fence part.
    Type: Application
    Filed: February 14, 2019
    Publication date: January 21, 2021
    Applicant: Meidensha Corporation
    Inventors: Toshimichi TAKAHASHI, Shoki SUTO, Noriaki HIROKAMI
  • Publication number: 20210018400
    Abstract: A vehicle securing apparatus is provided for pulling and securing a test vehicle provided to a vehicle testing device. The column stands on the pedestal. The vehicle securing apparatus includes a column, a traveling and rotating part, and a pedestal. The traveling and rotating part is structured to be coupled with a chain for pulling the test vehicle, and arranged coaxially with the column, and structured to travel vertically and rotate horizontally. The pedestal is structured to be attached to an arbitrary portion of a slide rail of the vehicle testing device.
    Type: Application
    Filed: February 14, 2019
    Publication date: January 21, 2021
    Applicant: MEIDENSHA CORPORATION
    Inventors: Toshimichi TAKAHASHI, Noriaki HIROKAMI
  • Patent number: 10895511
    Abstract: An electric inertia control device 5A simulates the behavior of an inertial body having a predetermined set moment of inertia Jset by means of a dynamometer, and is provided with: an inertia compensator 51A which generates a torque signal by multiplying a signal obtained by subtracting a shaft torque detection signal T12 from a higher-level command torque signal T* by the ratio of a moment of inertia J1 of the dynamometer to the set moment of inertia Jset, and generates an inertia compensation torque signal Tref by summing the torque signal and the shaft torque detection signal J1; and a resonance suppression control circuit 53A which uses the inertia compensation torque signal Tref and the shaft torque detection signal T12 to generate a torque current command signal T1 in such a way as to suppress resonance in a mechanical system including a test piece and the dynamometer.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: January 19, 2021
    Assignee: MEIDENSHA CORPORATION
    Inventors: Takashi Yamaguchi, Takao Akiyama
  • Publication number: 20210011454
    Abstract: This overall control device for a testing system comprises: a plurality of resonance suppression controllers that each generate a torque current command signal for suppressing mechanical resonance between a specimen and a dynamometer upon receiving a base torque current command signal and axial torque detection signal and have different input/output characteristics; a specimen characteristic acquisition unit for acquiring the value of the moment of inertia of the specimen connected to the dynamometer; and a resonance-suppression-controller selection unit for selecting one of the plurality of resonance suppression controllers on the basis of the value of the moment of inertia acquired by the specimen characteristic acquisition unit and mounting the selected resonance suppression controller in a dynamometer control module.
    Type: Application
    Filed: December 19, 2018
    Publication date: January 14, 2021
    Applicant: Meidensha Corporation
    Inventors: Masayasu KANKE, Takao AKIYAMA
  • Publication number: 20210008502
    Abstract: It is to intermittently and effectively generate large bubbles in a liquid phase. A bubble generation device 1 intermittently generates large bubbles a2 in a liquid phase. The bubble generation device 1 includes a bubble storing container 3, a pivot 4, and a pair of edge portion receivers 5a, 5b. The bubble storing container 3 stores bubbles a1 generated by a gas supply nozzle 2 in the liquid. The pivot 4 allows the bubble storing container 3 to pivot thereon, thereby releasing the large bubbles a2 from the bubble storing container 3. The pair of edge portion receivers 5a, 5b receives and blocks an edge portion of the bubble storing container 3 to limit pivot of the bubble storing container 3. An inside of the bubble storing container 3 is partitioned by a partition 30 that is installed in an axial direction of the pivot 4.
    Type: Application
    Filed: December 6, 2018
    Publication date: January 14, 2021
    Applicant: MEIDENSHA CORPORATION
    Inventors: Yin Qiang ROGER, Hiroshi NOGUCHI, Terutake NIWA, Osamu TAKASE
  • Patent number: 10892695
    Abstract: A low-frequency torque controller 9 outputs a low-frequency torque controller output ?dc* based on a torque command value ?* and a torque detection value ?det, and a vibrational torque controller 11 outputs a vibrational torque command value ?pd* based on the torque command value ?*, the torque detection value ?det, and a rotational phase detection value ?. Meanwhile, in a high-frequency resonance suppression controller, an inverter torque command value ?inv* is outputted based on the torque detection value ?det and a corrected torque command value ?r* obtained by adding the low-frequency torque controller output ?dc* to the vibrational torque command value ?pd*. The invention thus provides shaft torque vibrational control of a motor drive system wherein engine vibrational torque command values including distortion components are tracked while entirely removing the influence of resonance, non-periodic disturbances, and periodic disturbances.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: January 12, 2021
    Assignee: Meidensha Corporation
    Inventors: Yugo Tadano, Takao Akiyama, Takashi Yamaguchi
  • Publication number: 20210006131
    Abstract: Dynamo-electric machine (10) has cylindrical frame (11), cylindrical stator (12) fixed to an inside of the frame (11), cylindrical rotor (13) provided inside the stator (12) such that gap (G) is formed between the rotor (13) and the stator (12), rotation shaft (14) fixed to the rotor (13) so as to penetrate an inside of the rotor (13), and bracket (15) fixed to the frame (11) and rotatably supporting the rotation shaft (14). The stator (12) has duct (12a) radially formed at a middle portion in an axial direction of the stator (12) and communicating with the gap (G). The frame (11) has first supply opening (16) through which cooling air flow (1) is supplied in the frame (11) at axial direction both end sides of the frame (11), and second supply opening (17) through which cooling air flow (1) is supplied to the duct (12a) of stator (12).
    Type: Application
    Filed: February 26, 2019
    Publication date: January 7, 2021
    Applicant: MEIDENSHA CORPORATION
    Inventor: Kota KAWANISHI
  • Publication number: 20200408642
    Abstract: A vehicle testing device includes a safety fence for a front wheel of a test vehicle. The safety fence includes a fixed fence part and a slide fence part. The fixed fence part is structured to be disposed at a front side of the front wheel, and arranged substantially in parallel with the front wheel. The slide fence part is arranged in parallel with the fixed fence part, and structured to move toward a central part of the test vehicle.
    Type: Application
    Filed: February 14, 2019
    Publication date: December 31, 2020
    Applicant: MEIDENSHA CORPORATION
    Inventors: Toshimichi TAKAHASHI, Shoki SUTO, Noriaki HIROKAMI
  • Publication number: 20200413561
    Abstract: Workbench 6 is for operator performing interior maintenance of casing 2, and laid between casings 2a, 2b when separating casings. A pair of first supporting portions 61 are arranged parallel between casings so as to be able to horizontally support workbench body 60 when casings are in separating state. A pair of second supporting portions 62 are arranged parallel above bottom frame 21a of one casing 2a, and support one ends of first supporting portions 61 when workbench body 60 is in horizontal state. A pair of third supporting portions 63 are arranged parallel above bottom frame 21b with one ends of the third supporting portions 63, to which the other ends of first supporting portions 61 are pivotally fixed, overhanging from bottom frame 21b. Wiring holding section 71 of wiring duct 7 accommodating and protecting wires in casing 2 holds wires under workbench 6 between casings in separating state.
    Type: Application
    Filed: March 6, 2018
    Publication date: December 31, 2020
    Applicant: MEIDENSHA CORPORATION
    Inventors: Akihiko KODAMA, Nobuo OKAZAKI, Makoto MIWA, Shigenori IKEDA, Yoshio KIJIMA
  • Publication number: 20200407243
    Abstract: Disclosed is an apparatus for water treatment, including a membrane separator for solid-liquid separation; and a particle fractionator which has at least two exits of a fractionated solid-liquid mixture produced therein, wherein a liquor containing particles of different sizes including submicron particles is fed to the particle fractionator before a membrane separation by the membrane separator, and wherein a first fraction of the fractionated solid-liquid mixture is returned to the membrane separator from one exit of the at least two exits of the particle fractionator, the first fraction being less than the liquor in terms of content of the submicron particles. This apparatus enables a rapid achievement of suppression of membrane fouling.
    Type: Application
    Filed: March 31, 2017
    Publication date: December 31, 2020
    Applicant: MEIDENSHA CORPORATION
    Inventors: Hiroshi NOGUCHI, Guihe TAO, Terutake NIWA, Yasuhiro FUKUZAKI, Yingjie LEE, Jia Ting YEN, Seng Chye CHUA, Bernhard WETT