Patents by Inventor Junsuke Fujiwara

Junsuke Fujiwara 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).

  • Patent number: 10235658
    Abstract: The maintenance management device 3 includes an error status diagnosis unit 11, a grace period estimation unit 14, a maintenance cost estimation unit 15, and a screen display unit 17. When the error status diagnosis unit 11 has diagnosed the occurrence of an anomaly, the grace period estimation unit 14 estimates a first grace period leading up to the occurrence of a failure. The maintenance cost estimation unit 15 estimates the cost of corrective maintenance incurred when the failure occurs after the elapse of the first grace period. The screen display unit 17 displays a combination of the first grace period and the cost of corrective maintenance. Alternatively, the grace period estimation unit 14 estimates a second grace period over which preventive maintenance may be postponed without a failure.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: March 19, 2019
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hideaki Suzuki, Kozo Nakamura, Shinya Yuda, Munetoshi Unuma, Junsuke Fujiwara, Takayuki Uchida, Katsuaki Tanaka, Mitsuo Aihara, Teruo Nakamura, Nobuyoshi Hirowatari, Hiroshi Ogura
  • Patent number: 10204321
    Abstract: The device for searching for similar breakdown cases according to the present invention includes: a first means that detects a signal abnormality from a repair target machine, calculates the correlations between the signal abnormality and past abnormality cases by means of quantification, and regards the past abnormality cases as similar abnormality cases; a second means that obtains the component repair histories of the repair target machine in the similar abnormality cases by means of quantification; and a third means that, in accordance with the quantified correlations and the quantified component repair histories, determines and provides the priority levels of the plural past similar abnormality cases.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: February 12, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Uchida, Hideaki Suzuki, Junsuke Fujiwara, Shinya Yuda
  • Publication number: 20190003928
    Abstract: A rotary machine diagnostic device has a current acquisition unit that acquires current from a sensor, which measures the driving current of a rotary machine driving a machine to be driven; a sampling unit that performs sampling of the acquired driving current; a frequency range conversion unit that converts data concerning the time range subjected to sampling into a frequency range; a sideband detection unit that sets the driving current as a carrier wave in the frequency range, and detects, as a sideband, the spectrum appearing on each side of the carrier wave subjected to amplitude modulation; and an abnormality detection unit that detects whether or not there are abnormalities in the rotary machine and the machine to be driven on the basis of the difference in frequency between the sideband frequency detected by the sideband detection unit and the frequency of the carrier wave.
    Type: Application
    Filed: March 8, 2016
    Publication date: January 3, 2019
    Inventors: Munetoshi UNUMA, Junsuke FUJIWARA
  • Patent number: 10073447
    Abstract: In industrial machine abnormality diagnosis, if the machine is diagnosed to have abnormality, then sensor data from the machine needs to be sent to a management center for causal analysis. However, since machines operated at a remote site cannot always communicate with a management center, it has been found that, in some cases, sensor data that has failed to be sent from a machine remains in the memory of the machine, resulting in lack of available memory capacity. In view of this, the present invention determines beforehand whether the diagnosed machine will run out of available memory capacity before the completion of sending the amount of sensor data required for causal analysis for the machine, and instructs a maintenance person to recover memory.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: September 11, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Uchida, Hideaki Suzuki, Junsuke Fujiwara, Tomoaki Hiruta, Munetoshi Unuma
  • Publication number: 20160217398
    Abstract: An analysis device for time series data from an apparatus to be diagnosed according to the present invention is characterized by being provided with an accumulation device which accumulates sensor data, operation data, or control data, obtained from the apparatus to be diagnosed, while accumulating time information, an algorithm accumulation unit which accumulates algorithms for recognizing behavior of the apparatus to be diagnosed, a behavior recognition unit which recognizes behavior of the apparatus to be diagnosed by use a recognition algorithm, and a specification unit which specifies a behavioral item to be recognized, wherein: a behavior recognition algorithm corresponding to the specified behavioral item to be recognized is selected from the algorithm accumulation unit; sensor data, operation data, or control data to be used by the behavior recognition algorithm is selected from the accumulation device; the start and end times of a selected behavior are recognized by the behavior recognition unit; and
    Type: Application
    Filed: September 11, 2013
    Publication date: July 28, 2016
    Inventors: Munetoshi UNUMA, Hideaki SUZUKI, Tomoaki HIRUTA, Junsuke FUJIWARA, Takayuki UCHIDA, Shinya YUDA
  • Publication number: 20160209838
    Abstract: In industrial machine abnormality diagnosis, if the machine is diagnosed to have abnormality, then sensor data from the machine needs to be sent to a management center for causal analysis. However, since machines operated at a remote site cannot always communicate with a management center, it has been found that, in some cases, sensor data that has failed to be sent from a machine remains in the memory of the machine, resulting in lack of available memory capacity. In view of this, the present invention determines beforehand whether the diagnosed machine will run out of available memory capacity before the completion of sending the amount of sensor data required for causal analysis for the machine, and instructs a maintenance person to recover memory.
    Type: Application
    Filed: September 13, 2013
    Publication date: July 21, 2016
    Applicant: Hitachi, Ltd.
    Inventors: Takayuki UCHIDA, Hideaki SUZUKI, Junsuke FUJIWARA, Tomoaki HIRUTA, Munetoshi UNUMA
  • Publication number: 20160169771
    Abstract: The present invention relates to a condition monitoring apparatus for monitoring a machine condition. According to the present invention, the diagnosis accuracy can be improved as reducing dependence on technical knowledge about the machine. The condition monitoring apparatus that diagnosis an abnormal state of a machine based on machine operation data acquired from a plurality of sensors.
    Type: Application
    Filed: June 24, 2013
    Publication date: June 16, 2016
    Inventors: Tomoaki HIRUTA, Hideaki SUZUKI, Junsuke FUJIWARA, Takayuki UCHIDA
  • Patent number: 9317978
    Abstract: A condition monitoring system includes a terminal system unit and a condition monitoring system unit connected together via radiocommunication channels. The terminal system unit is mounted on a self-propelled machine, while the monitoring system unit is arranged at a control center. The monitoring system unit is provided with a unit for setting an alarm delivery condition, another unit for setting an aggregation condition, a further unit for transmitting the alarm delivery condition and aggregation condition so set, and a screen display unit for displaying various information. The terminal system unit is provided with an alarm creation unit for creating alarm information according to the alarm delivery condition so transmitted, an aggregate data creation unit for creating aggregate data according to the transmitted aggregation condition, and a data transmitting unit for transmitting the alarm information and aggregate data so created.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: April 19, 2016
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tomoaki Hiruta, Hideaki Suzuki, Junsuke Fujiwara, Takayuki Uchida
  • Patent number: 9291524
    Abstract: Provided is an operation data collection device for construction machines that is capable of efficiently collecting operation data indicative of impending failure of a construction machine by reducing the amount of information to be collected and stored without degrading the quality of information used for maintenance. The device receives operation data containing values measured by a plurality of sensors, a value indicating the operating status and an operation data storage section. The device includes a normal reference value storage section that stores a normal reference value for each of the sensors generating the operation data, a deviation calculation section that calculates the deviation of each of the sensors from the normal reference value, and a stored sensor item extraction section that extracts sensor items of operation data to be stored in the operation data storage section in accordance with the calculated deviation of each sensor.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: March 22, 2016
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Junsuke Fujiwara, Hideaki Suzuki
  • Patent number: 9189485
    Abstract: A predicted-failure-evidence diagnosing section for equipment that does not depend on the equipment and does not require knowledge of the equipment is provided. On the basis of a result of a predicted-abnormality-evidence diagnosis carried out by this section on time-series data gathered from the equipment, an allowable error used for compressing the gathered data can be set and managed in order to compress the data if the result of the diagnosis is normal or to restrict the compression of the data during a period in which an evidence of a predicted abnormality is detected. Thus, the amount of data stored in a memory can be reduced.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: November 17, 2015
    Assignee: HITACHI, LTD.
    Inventors: Shoji Suzuki, Junsuke Fujiwara, Hideaki Suzuki
  • Publication number: 20150206104
    Abstract: The maintenance management device 3 includes an error status diagnosis unit 11, a grace period estimation unit 14, a maintenance cost estimation unit 15, and a screen display unit 17. When the error status diagnosis unit 11 has diagnosed the occurrence of an anomaly, the grace period estimation unit 14 estimates a first grace period leading up to the occurrence of a failure. The maintenance cost estimation unit 15 estimates the cost of corrective maintenance incurred when the failure occurs after the elapse of the first grace period. The screen display unit 17 displays a combination of the first grace period and the cost of corrective maintenance. Alternatively, the grace period estimation unit 14 estimates a second grace period over which preventive maintenance may be postponed without a failure.
    Type: Application
    Filed: July 10, 2013
    Publication date: July 23, 2015
    Inventors: Hideaki Suzuki, Kozo Nakamura, Shinya Yuda, Munetoshi Unuma, Junsuke Fujiwara, Takayuki Uchida, Katsuaki Tanaka, Mitsuo Aihara, Teruo Nakamura, Nobuyoshi Hirowatari, Hiroshi Ogura
  • Publication number: 20150161573
    Abstract: The device for searching for similar breakdown cases according to the present invention includes: a first means that detects a signal abnormality from a repair target machine, calculates the correlations between the signal abnormality and past abnormality cases by means of quantification, and regards the past abnormality cases as similar abnormality cases; a second means that obtains the component repair histories of the repair target machine in the similar abnormality cases by means of quantification; and a third means that, in accordance with the quantified correlations and the quantified component repair histories, determines and provides the priority levels of the plural past similar abnormality cases.
    Type: Application
    Filed: July 11, 2012
    Publication date: June 11, 2015
    Applicant: Hitachi, Ltd.
    Inventors: Takayuki Uchida, Hideaki Suzuki, Junsuke Fujiwara, Shinya Yuda
  • Publication number: 20140288768
    Abstract: Provided is an operation data collection device for construction machines that is capable of efficiently collecting operation data indicative of impending failure of a construction machine by reducing the amount of information to be collected and stored without degrading the quality of information used for maintenance. The device receives operation data containing values measured by a plurality of sensors, a value indicating the operating status and an operation data storage section. The device includes a normal reference value storage section that stores a normal reference value for each of the sensors generating the operation data, a deviation calculation section that calculates the deviation of each of the sensors from the normal reference value, and a stored sensor item extraction section that extracts sensor items of operation data to be stored in the operation data storage section in accordance with the calculated deviation of each sensor.
    Type: Application
    Filed: November 20, 2012
    Publication date: September 25, 2014
    Inventors: Junsuke Fujiwara, Hideaki Suzuki
  • Publication number: 20140288675
    Abstract: Disclosed is a diagnostic processing system including an onboard terminal system and a server connected together via radio communication channels. The onboard terminal system is provided with a data receiving unit for receiving data from sensors arranged on a self-propelled machine and a first diagnostic unit for diagnosing an abnormality of the self-propelled machine, and the server is provided with a second diagnostic unit for diagnosing the abnormality of the self-propelled machine. The diagnostic processing system is configured such that one of the first diagnostic unit and second diagnostic unit performs a primary diagnosis as to the abnormality of the self-propelled machine based on the data received at the data receiving unit and transmits a result of the primary diagnosis to the other diagnostic unit, and upon receipt of the result of the primary diagnosis, the other diagnostic unit performs a secondary diagnosis based on the result of the primary diagnosis.
    Type: Application
    Filed: February 19, 2014
    Publication date: September 25, 2014
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Junsuke FUJIWARA, Hideaki SUZUKI, Takayuki UCHIDA, Tomoaki HIRUTA
  • Publication number: 20140232539
    Abstract: A condition monitoring system includes a terminal system unit and a condition monitoring system unit connected together via radiocommunication channels. The terminal system unit is mounted on a self-propelled machine, while the monitoring system unit is arranged at a control center. The monitoring system unit is provided with a unit for setting an alarm delivery condition, another unit for setting an aggregation condition, a further unit for transmitting the alarm delivery condition and aggregation condition so set, and a screen display unit for displaying various information. The terminal system unit is provided with an alarm creation unit for creating alarm information according to the alarm delivery condition so transmitted, an aggregate data creation unit for creating aggregate data according to the transmitted aggregation condition, and a data transmitting unit for transmitting the alarm information and aggregate data so created.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 21, 2014
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tomoaki HIRUTA, Hideaki SUZUKI, Junsuke FUJIWARA, Takayuki UCHIDA
  • Patent number: 8700293
    Abstract: Disclosed is a traffic information distribution apparatus 1 including date-time information in traffic information acquired by the traffic information acquire unit 12 or generated by the traffic information prediction unit, and accumulates the traffic information in the traffic information DB 13. When the traffic information distribution apparatus 1 receives distribution request information transmitted from the in-vehicle terminal 5, based on date-time information of reference traffic information held by the in-vehicle terminal 5 included in the distribution request information, the traffic information distribution apparatus 1 retrieves traffic information including the same date-time information as the date-time information of the reference traffic information from the traffic information DB 13.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: April 15, 2014
    Assignee: Xanavi Informatics Corporation
    Inventors: Mariko Okude, Kenichiro Yamane, Masatoshi Kumagai, Junsuke Fujiwara, Hirotaka Takahashi
  • Patent number: 8649730
    Abstract: A wireless communication system includes a wireless communication apparatus (fixed terminal) resided in a fixed station side providing a wireless antenna, a wireless communication unit, a server processing unit, a task list, a data communication unit, a buffer management unit and a buffer, and a wireless data transport apparatus (mobile terminal) resided in a mobile station side providing the wireless antenna, the wireless communication unit, a server determination unit, a task list I/O unit, the task list, a client processing unit and the buffer, thereby, the mobile terminal receives the task list from the fixed terminal to communicate data with another fixed terminal and transports not only the data but also a data acknowledgement, and the fixed terminal creates the acknowledgement to use the acknowledgement to thereby control a creation and deletion of bulk data appropriately.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: February 11, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Tsutomu Yamada, Yoshihito Sato, Hideaki Suzuki, Shoji Suzuki, Tatsuya Maruyama, Junsuke Fujiwara
  • Publication number: 20130097128
    Abstract: An allowable error used for compressing time-series data can be set without knowledge of equipment. It is possible to prevent the data from being lost not only in the event of an abnormality, but also during a period in which an evidence of a predicted abnormality is detected. In addition, it is also possible to verify the properness of a set allowable error. Thus, the amount of data gathered and stored in a memory can be reduced without losing information required for detection of an evidence of a predicted abnormality occurring in the equipment of interest. As a result, it is possible to provide a time-series data diagnosing/compressing method capable of gathering time-series data with a high degree of efficiency and a data gathering/storing apparatus adopting the method.
    Type: Application
    Filed: April 26, 2010
    Publication date: April 18, 2013
    Inventors: Shoji Suzuki, Junsuke Fujiwara, Hideaki Suzuki
  • Patent number: 8405521
    Abstract: A statistic DB creation processing section creates a statistic traffic DB, based on past actual traffic data (probe DB or VICS DB), and stores it in a statistic DB storage section. A reference-link-candidate extraction processing section extracts a complement target link (temporal missing link) from the statistic traffic DB, and further extracts complementary-reference-link-candidates for the complement target link, according to plural extraction rules to extract complementary-reference-link-candidates.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: March 26, 2013
    Assignee: Clarion Co., Ltd.
    Inventors: Junsuke Fujiwara, Takumi Fushiki
  • Patent number: 8185299
    Abstract: A route to a destination in which required travel time barely varies depending on weather is searched for without referring to weather forecast or weather information.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: May 22, 2012
    Assignee: Xanavi Informatics Corporation
    Inventors: Junsuke Fujiwara, Takumi Fushiki, Yoshinori Endo