Patents by Inventor Kenji Nagamatsu

Kenji Nagamatsu 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: 20210357792
    Abstract: In order to assist participants in thinking of an idea by acquiring audio data, it is provided a workshop assistance system, which includes a computer having an arithmetic apparatus configured to execute predetermined processing, a storage device coupled to the arithmetic apparatus, and a communication interface coupled to the arithmetic apparatus, the computer being configured to access solved problem case data including information of solved cases that correspond to problem data, the workshop assistance system comprising: a problem processing module configured to search, by the arithmetic apparatus, solved cases based on problem data that is generated from a discussion among participants; and an idea generation module configured to present, by the arithmetic apparatus, idea data including the generated problem data and information of the solved case found in the search to the participants.
    Type: Application
    Filed: January 31, 2019
    Publication date: November 18, 2021
    Applicant: Hitachi, Ltd.
    Inventors: Shuhei FURUYA, Yo TAKEUCHI, Kiyoshi KUMAGAI, Toshiyuki ONO, Masao ISHIGURO, Tatsuya TOKUNAGA, Chisa NAGAI, Takashi SUMIYOSHI, Naoyuki KANDA, Kenji NAGAMATSU, Kenji OHYA
  • Patent number: 11037553
    Abstract: The invention is directed to a learning-type interactive device which performs voice dialogue with a user and accumulates a result of the voice dialogue as knowledge including: a voice recognition portion which performs voice recognition on an acquired uttered voice of the user and converts the voice into text; an intention understanding portion which analyzes an utterance intention from the text voice-recognized by the voice recognition portion with reference to intention understanding model data learned from intention understanding learning data; an answer generation portion which refers to a QA DB and generates an answer text from the utterance intention analyzed by the intention understanding portion, a knowledge extraction portion which extracts knowledge from the text voice-recognized by the voice recognition portion, the utterance intention, and the answer text, and a knowledge classification portion which classifies the knowledge extracted by the knowledge extraction portion according to characteristi
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: June 15, 2021
    Assignee: HITACHI, LTD.
    Inventor: Kenji Nagamatsu
  • Patent number: 11018557
    Abstract: An speed detection apparatus of a rotational shaft in a robot arm that is applied to a drive mechanism is provided. The speed detection apparatus includes: first and second rotation sensors that are disposed on a side of a rotational shaft of the robot arm and outputs first and second rotational position signals with a phase difference of 90 degrees; first and second differentiators that differentiate the first and second rotational position signals; and a speed calculator that obtains a rotational speed of the robot arm by calculating a sum of squares of a first differential signal and a second differential signal.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: May 25, 2021
    Assignee: DENSO WAVE INCORPORATED
    Inventor: Kenji Nagamatsu
  • Publication number: 20190392005
    Abstract: A speech dialogue system automatically creates a plurality of slot value extraction models. The speech dialogue system includes: a value list in which a plurality of values indicating candidates of a character string and a plurality of value identifiers that identify the plurality of values are associated; and an answer sentence list in which slots that identify character string information and the value identifiers are associated. Each slot and each value identifier are associated with an answer sentence. An input character string is compared with slot value extraction models. A position of a slot associated with an assumed input character string is estimated, and a value corresponding to the estimated slot position is extracted. Learning data based on the value list, answer sentence list, and a peripheral character string list is created; and a model creating unit creates a first slot value extraction model based on the learning data.
    Type: Application
    Filed: May 23, 2019
    Publication date: December 26, 2019
    Inventors: Masaaki YAMAMOTO, Kenji NAGAMATSU, Makoto IWAYAMA
  • Publication number: 20190260273
    Abstract: An speed detection apparatus of a rotational shaft in a robot arm that is applied to a drive mechanism is provided. The speed detection apparatus includes: first and second rotation sensors that are disposed on a side of a rotational shaft of the robot arm and outputs first and second rotational position signals with a phase difference of 90 degrees; first and second differentiators that differentiate the first and second rotational position signals; and a speed calculator that obtains a rotational speed of the robot arm by calculating a sum of squares of a first differential signal and a second differential signal.
    Type: Application
    Filed: January 23, 2019
    Publication date: August 22, 2019
    Applicant: DENSO WAVE INCORPORATED
    Inventor: Kenji NAGAMATSU
  • Patent number: 10350754
    Abstract: A control device controlling a robot including a driving unit, a moving unit that is slidable along a predetermined track and a predetermined shaft that is slidably supported by the moving unit includes an instruction value calculating unit calculating an instruction value that drives the driving unit such that the moving unit is moved to a target position, an accelerating-speed calculating unit calculating an angular accelerating speed of when the instruction value changes, a gravity-center distance calculating unit calculating a gravity center distance, a correction instruction-value calculating unit calculating a correction instruction value by correcting the instruction value such that a position of the gravity center which is projected on the predetermined track approaches the target position, and a driving control unit controlling the driving unit based on the correction instruction value.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: July 16, 2019
    Assignee: DENSO WAVE INCORPORATED
    Inventor: Kenji Nagamatsu
  • Publication number: 20190080687
    Abstract: The invention is directed to a learning-type interactive device which performs voice dialogue with a user and accumulates a result of the voice dialogue as knowledge including: a voice recognition portion which performs voice recognition on an acquired uttered voice of the user and converts the voice into text; an intention understanding portion which analyzes an utterance intention from the text voice-recognized by the voice recognition portion with reference to intention understanding model data learned from intention understanding learning data; an answer generation portion which refers to a QA DB and generates an answer text from the utterance intention analyzed by the intention understanding portion, a knowledge extraction portion which extracts knowledge from the text voice-recognized by the voice recognition portion, the utterance intention, and the answer text, and a knowledge classification portion which classifies the knowledge extracted by the knowledge extraction portion according to characteristi
    Type: Application
    Filed: July 17, 2018
    Publication date: March 14, 2019
    Applicant: HITACHI, LTD.
    Inventor: Kenji Nagamatsu
  • Publication number: 20180085919
    Abstract: A control device controlling a robot including a driving unit, a moving unit that is slidable along a predetermined track and a predetermined shaft that is slidably supported by the moving unit includes an instruction value calculating unit calculating an instruction value that drives the driving unit such that the moving unit is moved to a target position, an accelerating-speed calculating unit calculating an angular accelerating speed of when the instruction value changes, a gravity-center distance calculating unit calculating a gravity center distance, a correction instruction-value calculating unit calculating a correction instruction value by correcting the instruction value such that a position of the gravity center which is projected on the predetermined track approaches the target position, and a driving control unit controlling the driving unit based on the correction instruction value.
    Type: Application
    Filed: July 28, 2017
    Publication date: March 29, 2018
    Applicant: DENSO WAVE INCORPORATED
    Inventor: Kenji NAGAMATSU
  • Publication number: 20160371458
    Abstract: Embodiments of the present disclosure relates to a method for estimation of effectiveness of a drug to be administered on a subject. The method comprises steps performed by the estimation server, which involve ranking of one or more medical attributes associated with the subject based on at least one of time parameters and dosage parameters associated with previous subjects. The steps further involve obtaining one or more filtered records from a plurality of records based on the ranking of the one or more medical attributes and a required number of records. Finally the effectiveness of the drug is estimated based on number of the one or more filtered records and predefined time duration.
    Type: Application
    Filed: June 9, 2016
    Publication date: December 22, 2016
    Applicant: HITACHI, LTD.
    Inventors: Marie Nestor Damian MARIYASAGAYAM, Kenji NAGAMATSU
  • Patent number: 8706171
    Abstract: A user of a hands-free phone cannot determine with which speech quality the distant side of communication is listened to, and does not know which action to be required to improve the speech quality. In the case of the present invention, a function of presenting an action to be implemented by the user to improve the speech quality at the opposite party is mounted on the hands-free terminal. For the presentation here, it is assumed that the hands-free terminal according to the present invention has a function of estimating the speech quality at the distant side, a function of estimating an action to be implemented by the user to improve the estimated speech quality, and a function of presenting the estimated action to the user.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: April 22, 2014
    Assignee: Clarion Co., Ltd.
    Inventors: Kenji Nagamatsu, Naoki Watanabe
  • Publication number: 20120330667
    Abstract: Included in a speech synthesizer, a natural language processing unit divides text data, input from a text input unit, into a plurality of components (particularly, words). An importance prediction unit estimates an importance level of each component according to the degree of how much each component contributes to understanding when a listener hears synthesized speech. Then, the speech synthesizer determines a processing load based on the device state when executing synthesis processing and the importance level. Included in the speech synthesizer, a synthesizing control unit and a wave generation unit reduce the processing time for a phoneme with a low importance level by curtailing its processing load (relatively degrading its sound quality), allocate a part of the processing time, made available by this reduction, to the processing time of a phoneme with a high importance level, and generates synthesized speech in which important words are easily audible.
    Type: Application
    Filed: June 20, 2012
    Publication date: December 27, 2012
    Inventors: Qinghua Sun, Kenji Nagamatsu, Yusuke Fujita
  • Publication number: 20120252370
    Abstract: A user of a hands-free phone cannot determine with which speech quality the distant side of communication is listened to, and does not know which action to be required to improve the speech quality. In the case of the present invention, a function of presenting an action to be implemented by the user to improve the speech quality at the opposite party is mounted on the hands-free terminal. For the presentation here, it is assumed that the hands-free terminal according to the present invention has a function of estimating the speech quality at the distant side, a function of estimating an action to be implemented by the user to improve the estimated speech quality, and a function of presenting the estimated action to the user.
    Type: Application
    Filed: February 13, 2012
    Publication date: October 4, 2012
    Applicant: CLARION CO., LTD.
    Inventors: Kenji NAGAMATSU, Naoki WATANABE
  • Patent number: 7991616
    Abstract: The present invention is a speech synthesizer that generates speech data of text including a fixed part and a variable part, in combination with recorded speech and rule-based synthetic speech. The speech synthesizer is a high-quality one in which recorded speech and synthetic speech are concatenated with the discontinuity of timbres and prosodies not perceived.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: August 2, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yusuke Fujita, Ryota Kamoshida, Kenji Nagamatsu
  • Patent number: 7765031
    Abstract: In a robot, a first determining unit determines whether there is an interference region in which a first occupation region and a second occupation region are at least partially overlapped with each other. A second determining determines whether a second movable part of another robot is at least partially located in the interference region based on an actual position of the second movable part. A stopping unit begins stopping, at a predetermined timing, movement of the first movable part if it is determined that there is the interference region, and that the second movable part is at least partially located in the interference region. The predetermined timing is determined based on a positional relationship between an actual position of the first movable part and the interference region.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: July 27, 2010
    Assignee: Denso Wave Incorporated
    Inventor: Kenji Nagamatsu
  • Publication number: 20080243511
    Abstract: The present invention is a speech synthesizer that generates speech data of text including a fixed part and a variable part, in combination with recorded speech and rule-based synthetic speech. The speech synthesizer is a high-quality one in which recorded speech and synthetic speech are concatenated with the discontinuity of timbres and prosodies not perceived.
    Type: Application
    Filed: October 22, 2007
    Publication date: October 2, 2008
    Inventors: Yusuke Fujita, Ryota Kamoshida, Kenji Nagamatsu
  • Patent number: 7321808
    Abstract: When braking of a motion of a part of a first robot is assumed to be started at points in time, a first stop position of the first robot part is estimated at each point in time. When braking of a motion of a part of a second robot is assumed to be started at the points in time, an estimated second stop position of the second robot part is obtained at each point in time. When it is determined that the first stop position of the first robot part at one of the points in time and either the actual position or the second stop position of the second robot part for each interval at the one of the points in time are contained in the shared workspace, the first robot part is braked.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: January 22, 2008
    Assignee: Denso Wave Incorporated
    Inventor: Kenji Nagamatsu
  • Publication number: 20070118250
    Abstract: In a robot, a first determining unit determines whether there is an interference region in which a first occupation region and a second occupation region are at least partially overlapped with each other. A second determining determines whether a second movable part of another robot is at least partially located in the interference region based on an actual position of the second movable part. A stopping unit begins stopping, at a predetermined timing, movement of the first movable part if it is determined that there is the interference region, and that the second inovable part is at least partially located in the interference region. The predetermined timing is determined based on a positional relationship between an actual position of the first movable part and the interference region.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 24, 2007
    Applicant: DENSO WAVE INCORPORATED
    Inventor: Kenji Nagamatsu
  • Publication number: 20070118249
    Abstract: When braking of a motion of a part of a first robot is assumed to be started at points in time, a first stop position of the first robot part is estimated at each point in time. When braking of a motion of a part of a second robot is assumed to be started at the points in time, an estimated second stop position of the second robot part is obtained at each point in time. When it is determined that the first stop position of the first robot part at one of the points in time and either the actual position or the second stop position of the second robot part for each interval at the one of the points in time are contained in the shared workspace, the first robot part is braked.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 24, 2007
    Applicant: DENSO WAVE INCORPORATED
    Inventor: Kenji Nagamatsu
  • Patent number: 7113909
    Abstract: A stereotypical sentence is synthesized into a voice of an arbitrary speech style. A third party is able to prepare prosody data and a user of a terminal device having a voice synthesizing part can acquire the prosody data. The voice synthesizing method determines a voice-contents identifier to point to a type of voice contents of a stereotypical sentence, prepares a speech style dictionary including speech style and prosody data which correspond to the voice-contents identifier, selects prosody data of the synthesized voice to be generated from the speech style dictionary, and adds the selected prosody data to a voice synthesizer 13 as voice-synthesizer driving data to thereby perform voice synthesis with a specific speech style. Thus, a voice of a stereotypical sentence can be synthesized with an arbitrary speech style.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: September 26, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Nobuo Nukaga, Kenji Nagamatsu, Yoshinori Kitahara
  • Patent number: 6819301
    Abstract: Disclosed here is an information providing system for mobile objects. The system obtains information of a moving purpose of the user of each mobile object to provide the user with information matching with the moving purpose. The information providing system comprises route type determining apparatus for determining the type of the current route on which the user is moving, provided information selecting unit for selecting information to be provided to the user according to the route type determined by the route type determining apparatus, and provided information presenting means for presenting the information selected by the provided information selecting unit to the user. Therefore, the user can receive more proper information according to the user's moving purpose at that time, thereby the convenience of the user is improved while the information provider can improve the advertisement effect by transmitting information to more proper users.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: November 16, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Nagamatsu, Kenichi Mizuishi