Patents by Inventor Takanori Miyasaka

Takanori Miyasaka 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: 20210255060
    Abstract: An abnormality diagnosis method of a rolling bearing used in rotating machinery includes: a time acquisition step of acquiring, from an output signal detected by a sensor during the rotation of the rolling bearing, an entry time when a rolling element enters a flaking region of a bearing ring, and an escape time when the rolling element escapes from the flaking region of the bearing ring; and an estimation step of estimating a flaking size based on a flaking passage time, which is a time difference between the entry time and the escape time. When the bearing ring receives repeated load from the rolling element, the progress of the flaking occurring in the bearing ring can be quantitatively evaluated.
    Type: Application
    Filed: August 23, 2019
    Publication date: August 19, 2021
    Applicant: NSK LTD.
    Inventors: Toshimitsu MAEKAWA, Kenichi SHIBASAKI, Takanori MIYASAKA, Yoshihiro SATO
  • Publication number: 20200191684
    Abstract: A vibration analyzer is configured to analyze vibration of a machine component and which is capable of performing an operation on a basis of a signal received from an information terminal and transmitting a signal obtained as a result of the operation to the information terminal. The vibration analyzer includes a vibration sensor configured to detect a vibration of the machine component, a filter processing unit configured to extract a predetermined frequency band from a waveform of a signal detected by the vibration sensor, and a calculation processing unit configured to analyze frequency of a waveform after filter processing obtained by the filter processing unit and to obtain spectrum data. Accordingly, it is possible to reduce a data amount to be transmitted between the analyzer and the information terminal, thereby shortening data transfer time.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Applicant: NSK LTD.
    Inventors: Takanori MIYASAKA, Yoshihiro SATO, Yasushi MUTO, Yingyi WEN, Osamu YOSHIMATSU
  • Publication number: 20200124499
    Abstract: An information terminal is configured to extract a predetermined frequency band from a waveform of a signal of a machine component detected by a vibration sensor, to compare an analyzed frequency component and a damaging frequency resulting from a damage of the machine component, and to diagnose abnormality of the machine component. The information terminal includes a database in which the damaging frequency resulting from the damage of the machine component is preserved as a converted damaging frequency obtained by converting the damaging frequency on a basis of a predetermined rotating speed of the machine component. The damaging frequency is provided by calculating the converted damaging frequency in the database by using an actual rotating speed of the machine component. Accordingly, it is possible to keep specifications of a machine component confidential without preserving the specifications of the machine component.
    Type: Application
    Filed: December 17, 2019
    Publication date: April 23, 2020
    Applicant: NSK LTD.
    Inventors: Takanori MIYASAKA, Yoshihiro SATO, Yasushi MUTO, Yingyi WEN, Osamu YOSHIMATSU
  • Publication number: 20190137359
    Abstract: An information terminal is configured to extract a predetermined frequency band from a waveform of a signal of a machine component detected by a vibration sensor, to compare an analyzed frequency component and a damaging frequency resulting from a damage of the machine component, and to diagnose abnormality of the machine component. The information terminal includes a database in which the damaging frequency resulting from the damage of the machine component is preserved as a converted damaging frequency obtained by converting the damaging frequency on a basis of a predetermined rotating speed of the machine component. The damaging frequency is provided by calculating the converted damaging frequency in the database by using an actual rotating speed of the machine component. Accordingly, it is possible to keep specifications of a machine component confidential without preserving the specifications of the machine component.
    Type: Application
    Filed: February 23, 2018
    Publication date: May 9, 2019
    Applicant: NSK LTD.
    Inventors: Takanori MIYASAKA, Yoshihiro SATO, Yasushi MUTO, Yingyi WEN, Osamu YOSHIMATSU
  • Publication number: 20190137360
    Abstract: A vibration analyzer is configured to analyze vibration of a machine component and which is capable of performing an operation on a basis of a signal received from an information terminal and transmitting a signal obtained as a result of the operation to the information terminal. The vibration analyzer includes a vibration sensor configured to detect a vibration of the machine component, a filter processing unit configured to extract a predetermined frequency band from a waveform of a signal detected by the vibration sensor, and a calculation processing unit configured to analyze frequency of a waveform after filter processing obtained by the filter processing unit and to obtain spectrum data. Accordingly, it is possible to reduce a data amount to be transmitted between the analyzer and the information terminal, thereby shortening data transfer time.
    Type: Application
    Filed: February 23, 2018
    Publication date: May 9, 2019
    Applicant: NSK LTD.
    Inventors: Takanori MIYASAKA, Yoshihiro SATO, Yasushi MUTO, Yingyi WEN, Osamu YOSHIMATSU
  • Patent number: 7860663
    Abstract: A abnormality diagnosing apparatus used in a machine equipment including a rotating or sliding part relative to a stationary member includes a detecting portion 31 fixed to the rotating or sliding part or the stationary member and including a vibration sensor 32 and a temperature sensor 33, and a signal processing portion 81 for determining a state of the part from a detecting signal outputted by the detecting portion 31. The signal processing portion 81 determines presence or absence of a abnormality, or presence or absence of the abnormality and a degree of a damage of the part based on a combination of a measured result by the vibration sensor 32 and a measured result by the temperature sensor 33.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: December 28, 2010
    Assignee: NSK Ltd.
    Inventors: Takanori Miyasaka, Yasushi Mutoh, Juntaro Sahara
  • Patent number: 7640139
    Abstract: Provided are an envelope processor 103, for obtaining an envelope for a detected signal; a FFT unit 104, for converting the envelope into a frequency spectrum; a peak detector 105, for smoothing the frequency spectrum by calculating a moving average, for further performing smoothing and differentiation for the spectrum, and detecting, as peaks, frequency points at which a sign of a differential coefficient is changed from positive to negative, for extracting peaks having a predetermined threshold value or greater, and for sorting the extracted peaks and detecting upper peaks; and a diagnosis processor T, for diagnosing an abnormality based on the detected peaks.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: December 29, 2009
    Assignee: NSK Ltd.
    Inventors: Juntaro Sahara, Yasushi Mutoh, Takanori Miyasaka, Masanobu Yamazoe
  • Patent number: 7587299
    Abstract: An anomaly diagnosis apparatus for analyzing sound or vibration data produced by a machine installation and diagnosing the presence or absence of an anomaly in a sliding member in the machine installation which is made up of a diagnosis processing server (1) and a user information processing terminal (3) which are connected through a network (2). The diagnosis processing server (1) receives the sound or vibration data produced by the machine installation and information for identifying the sliding member used with the machine installation through the network (2) from the user information processing terminal 3, makes an anomaly diagnosis of the machine installation based on the received data, and transmits the diagnosis result through the network (2) to the user information processing terminal (3), thereby lightening the burden of the user and executing anomaly diagnosis processing promptly.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: September 8, 2009
    Assignee: NSK Ltd.
    Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda
  • Publication number: 20080234964
    Abstract: A abnormality diagnosing apparatus used in a machine equipment including a rotating or sliding part relative to a stationary member includes a detecting portion 31 fixed to the rotating or sliding part or the stationary member and including a vibration sensor 32 and a temperature sensor 33, and a signal processing portion 81 for determining a state of the part from a detecting signal outputted by the detecting portion 31. The signal processing portion 81 determines presence or absence of a abnormality, or presence or absence of the abnormality and a degree of a damage of the part based on a combination of a measured result by the vibration sensor 32 and a measured result by the temperature sensor 33.
    Type: Application
    Filed: September 13, 2005
    Publication date: September 25, 2008
    Applicant: NSK LTD.
    Inventors: Takanori Miyasaka, Yasushi Mutoh, Juntaro Sahara
  • Publication number: 20080033695
    Abstract: Provided are an envelope processor 103, for obtaining an envelope for a detected signal; a FFT unit 104, for converting the envelope into a frequency spectrum; a peak detector 105, for smoothing the frequency spectrum by calculating a moving average, for further performing smoothing and differentiation for the spectrum, and detecting, as peaks, frequency points at which a sign of a differential coefficient is changed from positive to negative, for extracting peaks having a predetermined threshold value or greater, and for sorting the extracted peaks and detecting upper peaks; and a diagnosis processor T, for diagnosing an abnormality based on the detected peaks.
    Type: Application
    Filed: October 17, 2005
    Publication date: February 7, 2008
    Applicant: NSK LTD
    Inventors: Juntaro Sahara, Yasushi Mutoh, Takanori Miyasaka, Masanobu Yamazoe
  • Publication number: 20080027659
    Abstract: An object of the invention is to provide an anomaly diagnosis apparatus of a machine installation for eliminating the need for the user to have a dedicated analytical instrument or a skill required for anomaly diagnosis of a sliding member and enabling the user to easily make an anomaly diagnosis request with a small burden and get the diagnosis result promptly. In the invention, an anomaly diagnosis apparatus for analyzing sound or vibration data produced by a machine installation and diagnosing the presence or absence of an anomaly in a sliding member in the machine installation is made up of a diagnosis processing server (1) and a user information processing terminal (3) which are connected through a network (2).
    Type: Application
    Filed: August 29, 2007
    Publication date: January 31, 2008
    Applicant: NSK Ltd
    Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda
  • Publication number: 20080010039
    Abstract: An object of the invention is to provide an anomaly diagnosis apparatus of a machine installation for eliminating the need for the user to have a dedicated analytical instrument or a skill required for anomaly diagnosis of a sliding member and enabling the user to easily make an anomaly diagnosis request with a small burden and get the diagnosis result promptly. In the invention, an anomaly diagnosis apparatus for analyzing sound or vibration data produced by a machine installation and diagnosing the presence or absence of an anomaly in a sliding member in the machine installation is made up of a diagnosis processing server (1) and a user information processing terminal (3) which are connected through a network (2).
    Type: Application
    Filed: August 29, 2007
    Publication date: January 10, 2008
    Applicant: NSK Ltd
    Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda
  • Publication number: 20070118333
    Abstract: An abnormality diagnosis system for diagnosing a presence or absence of an abnormality of a bearing unit for a railway vehicle axle, comprises a sensing/processing portion for outputting a signal generated from the bearing unit as an electric signal, a calculating/processing portion for making an abnormality diagnosis of the bearing unit based on an output of the sensing/processing portion, a result outputting portion for outputting a decision result of the calculating/processing portion, and a controlling/processing portion for feeding back a control signal to a control system of the railway vehicle based on the decision result.
    Type: Application
    Filed: December 27, 2006
    Publication date: May 24, 2007
    Applicant: NSK LTD.
    Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutou, Juntaro Sahara
  • Patent number: 7184930
    Abstract: An abnormality diagnosis system for diagnosing a presence or absence of an abnormality of a bearing unit for a railway vehicle axle, comprises a sensing/processing portion for outputting a signal generated from the bearing unit as an electric signal, a calculating/processing portion for making an abnormality diagnosis of the bearing unit based on an output of the sensing/processing portion, a result outputting portion for outputting a decision result of the calculating/processing portion, and a controlling/processing portion for feeding back a control signal to a control system of the railway vehicle based on the decision result.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: February 27, 2007
    Assignee: NSK Ltd.
    Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutou, Juntaro Sahara
  • Publication number: 20060167659
    Abstract: An abnormality diagnosis system for diagnosing a presence or absence of an abnormality of a bearing unit for a railway vehicle axle, comprises a sensing/processing portion for outputting a signal generated from the bearing unit as an electric signal, a calculating/processing portion for making an abnormality diagnosis of the bearing unit based on an output of the sensing/processing portion, a result outputting portion for outputting a decision result of the calculating/processing portion, and a controlling/processing portion for feeding back a control signal to a control system of the railway vehicle based on the decision result.
    Type: Application
    Filed: August 29, 2003
    Publication date: July 27, 2006
    Applicant: NSK LTD.
    Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutou, Juntaro Sahara
  • Publication number: 20040030419
    Abstract: An object of the invention is to provide an anomaly diagnosis apparatus of a machine installation for eliminating the need for the user to have a dedicated analytical instrument or a skill required for anomaly diagnosis of a sliding member and enabling the user to easily make an anomaly diagnosis request with a small burden and get the diagnosis result promptly.
    Type: Application
    Filed: May 5, 2003
    Publication date: February 12, 2004
    Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda