Patents by Inventor Yusuke CHIKADA

Yusuke CHIKADA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210231190
    Abstract: A vibration damping device for reducing vibration of an elevator rope includes a displacement amplifier arranged around a region from a first portion of the elevator rope drawn and a second portion of the elevator rope drawn from an opposite side of one or more sheaves in parallel with the first portion. The displacement amplifier is configured to amplify a displacement of each of the first portion and the second portion of the elevator rope. The device also includes a limiting member that controls displacement amplification performed by the displacement amplifier such that the displacement of the first portion or the second portion amplified by the displacement amplifier does not become greater than a first displacement, which is a displacement of the elevator rope by which the elevator rope is not allowed to return to an equilibrium position of the vibration.
    Type: Application
    Filed: December 3, 2018
    Publication date: July 29, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Eiichi SAITO, Takahide HIRAI, Seiji WATANABE, Daisuke NAKAZAWA, Daiki FUKUI, Tomohiro ASAMURA, Yusuke CHIKADA
  • Publication number: 20210130127
    Abstract: An object of the present invention is to provide a sway amount estimation system that can suppress a reduction in user convenience that would occur if the operation method is switched more than necessary. A sway amount estimation system (300) includes a sensing unit (78), a judgment unit (80), and an estimation unit (79). The estimation unit (79) calculates an estimated value of the amount of sway of an elevator rope due to vibration caused by building sway based on the sway sensed by the sensing unit (78) and an estimation model incorporating the effect of the displacement amplification of the displacement amplifier (7). The judgment unit (80) judges if the estimated value calculated by the estimation unit (79) is greater than a threshold for switching the operation method for the elevator apparatus (11).
    Type: Application
    Filed: December 3, 2018
    Publication date: May 6, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Eiichi SAITO, Takahide HIRAI, Seiji WATANABE, Daisuke NAKAZAWA, Daiki FUKUI, Tomohiro ASAMURA, Yusuke CHIKADA
  • Publication number: 20210094793
    Abstract: An object of the invention is to provide a vibration damping system that can avoid the occurrence of resonance of an elevator rope regardless of the vibration frequency of a vibration source. A vibration damping system (200) includes a displacement amplifier (7), a calculation unit (66), and a displacement amplification control unit (67). The displacement amplifier (7) is arranged along a given position in the longitudinal direction of the elevator rope. The displacement amplifier (7) amplifies a displacement due to vibration of the elevator rope based on a variable amplification factor. The calculation unit (66) calculates the natural frequency of the elevator rope. The displacement amplification control unit (67) controls the displacement amplification of the displacement amplifier (7) based on the natural frequency calculated by the calculation unit (66) and a preset vibration frequency.
    Type: Application
    Filed: December 3, 2018
    Publication date: April 1, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Eiichi SAITO, Takahide HIRAI, Seiji WATANABE, Daisuke NAKAZAWA, Daiki FUKUI, Tomohiro ASAMURA, Yusuke CHIKADA
  • Publication number: 20210094799
    Abstract: An object of the present invention is to provide a vibration damping device including an instability preventing means, for efficiently suppressing amplification of vibration of a long structure, which is mechanically flexible, due to a resonance phenomenon. A vibration damping device (100) for reducing vibration of a long structure (1) includes a displacement amplifier (7) and limiting members (8). The displacement amplifier (7) is arranged along a given position in the longitudinal direction of the structure (1). The displacement amplifier (7) amplifies a displacement of the structure (1). The limiting members (8) control displacement amplification performed by the displacement amplifier (7) such that the displacement of the structure (1) amplified by the displacement amplifier (7) does not become greater than a first displacement, the first displacement being a displacement of the structure (1) by which the structure (1) is not allowed to return to the equilibrium position of the vibration.
    Type: Application
    Filed: December 3, 2018
    Publication date: April 1, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Eiichi SAITO, Takahide HIRAI, Seiji WATANABE, Daisuke NAKAZAWA, Daiki FUKUI, Tomohiro ASAMURA, Yusuke CHIKADA