Patents by Inventor Takahiro Kumura

Takahiro Kumura 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: 11614205
    Abstract: A piping diagnostic device according to an exemplary aspect of the present invention includes: criteria distribution generating means for generating a criteria distribution that is statistical data of criteria data of piping based on construction information about the piping, design information about the piping, and material information about the piping; changed-state distribution generating means for generating a changed-state distribution that is statistical data of changed-state data of the piping that have changed due to aging based on at least either vibration or dynamic pressure of the piping that have changed due to aging; measurement means for measuring at least either vibration or dynamic pressure of the piping; and determining means for determining deterioration of the piping based on the criteria distribution, the changed-state distribution, and at least either vibration or dynamic pressure of the piping.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: March 28, 2023
    Assignee: NEC CORPORATION
    Inventors: Soichiro Takata, Takahiro Kumura, Kanta Miyake, Shin Tominaga, Hirofumi Inoue, Shigeki Shinoda
  • Patent number: 11402290
    Abstract: A leakage inspection device according to an aspect of the present disclosure includes: at least one memory storing a set of instructions; and at least one processor configured to execute the set of instructions to: determine a measurement time; measure vibration waveforms for the measurement time by using at least two sensors set to a pipe; calculate a cross-correlation function of the measured vibration waveforms; detect peaks of the cross-correlation function at least twice in the measurement time; and determine that leakage occurs in a case where the peaks are repeatedly detected in the measurement time.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: August 2, 2022
    Assignee: NEC CORPORATION
    Inventors: Shigeki Shinoda, Hirofumi Inoue, Junichiro Mataga, Takahiro Kumura, Katsumi Kikuchi
  • Publication number: 20210209923
    Abstract: Provided is a system which allow a server to acquire information for grasping a state of an object, even when a communication bandwidth is limited. In a detection system, each of a plurality of sensor units transmits, when an event has been detected, event information indicating that the event has occurred, to the server, and the server identifies, when the event information has been reported from at least one of the plurality of sensor units, at least one sensor unit different from the sensor unit from which the event information has been reported, from among the plurality of sensor units, and acquires data related to the event from the identified sensor unit.
    Type: Application
    Filed: March 13, 2017
    Publication date: July 8, 2021
    Applicant: NEC CORPORATION
    Inventor: Takahiro KUMURA
  • Publication number: 20210190272
    Abstract: A piping diagnostic device according to an exemplary aspect of the present invention includes: criteria distribution generating means for generating a criteria distribution that is statistical data of criteria data of piping based on construction information about the piping, design information about the piping, and material information about the piping; changed-state distribution generating means for generating a changed-state distribution that is statistical data of changed-state data of the piping that have changed due to aging based on at least either vibration or dynamic pressure of the piping that have changed due to aging; measurement means for measuring at least either vibration or dynamic pressure of the piping; and determining means for determining deterioration of the piping based on the criteria distribution, the changed-state distribution, and at least either vibration or dynamic pressure of the piping.
    Type: Application
    Filed: February 16, 2017
    Publication date: June 24, 2021
    Applicant: NEC Corporation
    Inventors: Soichiro TAKATA, Takahiro KUMURA, Kanta MIYAKE, Shin TOMINAGA, Hirofumi INOUE, Shigeki SHINODA
  • Publication number: 20210164859
    Abstract: Provided are an analyzing device and the like capable of suppressing erroneous determination. This analyzing device is provided with: a cross correlation calculating unit that obtains a cross correlation function with respect to vibrations detected at two points contained in a measurement sector of a pipeline; an estimating unit that estimates a cause of the vibrations, on the basis of the continuity of peaks in the cross correlation function; and an analyzing unit that analyzes the actual generation location of the vibrations and cause of the vibrations on the basis of an estimated generation location of the vibrations and cause of the vibrations and information relating to the configuration of a pipeline network.
    Type: Application
    Filed: July 23, 2018
    Publication date: June 3, 2021
    Applicant: NEC Corporation
    Inventors: Shigeki SHINODA, Hirofumi INOUE, Takahiro KUMURA, Katsumi KIKUCHI
  • Patent number: 10996202
    Abstract: To acquire information relating to degradation of a pipe on the basis of information that can be acquired using a simple method. The analysis device according to one embodiment is provided with: a determining unit for determining whether or not the accuracy of a pipe network model based on information that includes a parameter that changes in value in accordance with degradation of a pipe satisfies a predetermined criterion; and a derivation unit for deriving information relating to degradation of the pipe, based on the parameter, if the accuracy satisfies the predetermined criterion.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: May 4, 2021
    Assignee: NEC CORPORATION
    Inventors: Manabu Kusumoto, Katsumi Kikuchi, Takahiro Kumura
  • Publication number: 20210116323
    Abstract: A leakage inspection device according to an aspect of the present disclosure includes: at least one memory storing a set of instructions; and at least one processor configured to execute the set of instructions to: determine a measurement time; measure vibration waveforms for the measurement time by using at least two sensors set to a pipe; calculate a cross-correlation function of the measured vibration waveforms; detect peaks of the cross-correlation function at least twice in the measurement time; and determine that leakage occurs in a case where the peaks are repeatedly detected in the measurement time.
    Type: Application
    Filed: June 13, 2019
    Publication date: April 22, 2021
    Applicant: NEC CORPORATION
    Inventors: Shigeki SHINODA, Hirofumi INOUE, Junichiro MATAGA, Takahiro KUMURA, Katsumi KIKUCHI
  • Publication number: 20200049595
    Abstract: A pipe diagnosis apparatus 10 includes a time-series data acquisition unit 11 that acquires time-series data on pressure of a fluid in piping equipment to be diagnosed, a pressure change measurement unit 12 that measures the number of pressure changes in the fluid from the time-series data on the pressure of the fluid, and a failure risk estimation unit 13 that estimates a failure risk of the piping equipment based on the measured number of pressure changes and a strength of a pipe included in the piping equipment.
    Type: Application
    Filed: January 23, 2018
    Publication date: February 13, 2020
    Applicant: NEC Corporation
    Inventors: Jun SAKAI, Takahiro KUMURA, Manabu KUSUMOTO, Soichiro TAKATA
  • Publication number: 20200003653
    Abstract: Provided is an analysis device which enables highly accurate diagnosis of a structure state. An analysis device includes a system identification unit, an input modeling unit, an input generation unit, and a response calculation unit. The system identification unit identifies a model representing time evolution of a structure using a non-Gaussian random process, based on a distribution of response of the structure. The input modeling unit generates a probability model representing a distribution of an input, based on data indicating fluctuation of the input to the structure. The input generation unit generates an input signal for the structure based on the probability model. The response calculation unit random response of vibration occurring in the structure in response to the input signal, based on the model and the input signal.
    Type: Application
    Filed: March 22, 2018
    Publication date: January 2, 2020
    Applicant: NEC Corporation
    Inventors: Soichiro TAKATA, Takahiro KUMURA, Katsumi KIKUCHI
  • Patent number: 10474776
    Abstract: An apparatus, method and the like which enables to represent a pipe network transporting a fluid by use of electrical circuit network is provided. The pipe network analysis apparatus includes; processing circuitry configured to receive a pipe network model that represents a pipe network being constituted by one or more piping elements, convert at least one piping element to an element of an electric circuit being configured to represent a non-linear relation between a pressure and a flow rate of the fluid in the piping elements by use of a relation between a voltage and a current, and generate a model representing an electric circuit network expressing the pipe network, by use of the element of the electric circuit; and an output device configured to provide the model analyzable by a specific electric circuit simulator.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 12, 2019
    Assignee: NEC Corporation
    Inventors: Manabu Kusumoto, Yuichi Nakamura, Takahiro Kumura
  • Publication number: 20190154637
    Abstract: To acquire information relating to degradation of a pipe on the basis of information that can be acquired using a simple method. The analysis device according to one embodiment is provided with: a determining unit for determining whether or not the accuracy of a pipe network model based on information that includes a parameter that changes in value in accordance with degradation of a pipe satisfies a predetermined criterion; and a derivation unit for deriving information relating to degradation of the pipe, based on the parameter, if the accuracy satisfies the predetermined criterion.
    Type: Application
    Filed: May 11, 2017
    Publication date: May 23, 2019
    Applicant: NEC Corporation
    Inventors: Manabu KUSUMOTO, Katsumi KIKUCHI, Takahiro KUMURA
  • Patent number: 10287756
    Abstract: In order to keep the deterioration of water distribution pipes from progressing, a tap water management system is provided with: a water pressure detection unit for detecting the water pressure in at least one location in a water distribution pipe for carrying clean water from a water distribution site to a consumer. and transmitting the detection result as water pressure information; a deterioration detection unit for detecting deterioration in at least one location in a water distribution pipe, and transmitting the detection result as deterioration information; a water distribution planning unit for causing a water distribution plan that is a plan for water distribution pressure to be determined on the basis of information regarding past water demand; a deterioration-reducing water distribution planning unit for deciding, on the basis of the water distribution plan, the water pressure information, and the deterioration information.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: May 14, 2019
    Assignee: NEC CORPORATION
    Inventors: Dai Kobayashi, Takahiro Kumura, Masatake Takahashi
  • Publication number: 20180348080
    Abstract: Provided is a device that may accurately predict a deterioration tendency of a pipe. The device includes a plurality of detection units 10, a cross-correlation function calculation unit 22, a deterioration level calculation unit 24, and a deterioration prediction unit 25. The plurality of detection units 10 detect undulations at least two locations in a pipe in which a fluid flows. The cross-correlation function calculation unit 22 calculates a cross-correlation function of the pipe, based on the undulations at the at least two locations in the pipe detected by the plurality of detection units 10. The deterioration level calculation unit 24 calculates a deterioration level of the pipe, based on a shape of the cross-correlation function of the pipe. The deterioration prediction unit 25 predicts a deterioration tendency of the pipe, based on a temporal change of the deterioration level.
    Type: Application
    Filed: December 1, 2016
    Publication date: December 6, 2018
    Applicant: NEC Corporation
    Inventors: Hirofumi INOUE, Takahiro KUMURA, Soichiro TAKATA
  • Publication number: 20170343514
    Abstract: Degradation of a pipe can be easily detected. A piping inspection system 1 includes an excitation unit 100, a wave detection unit 210, and a diagnosis unit 220. The excitation unit 100 excites waves of different wave modes simultaneously at a first position of a pipe 300. The wave detection unit 210 detects the waves of different wave modes at a second position of the pipe 300. The diagnosis unit 220 diagnoses degradation of the pipe 300 based on a velocity of one of the waves of different wave modes, the velocity being calculated by using a detection time difference between the waves of different wave modes.
    Type: Application
    Filed: January 13, 2016
    Publication date: November 30, 2017
    Applicant: NEC Corporation
    Inventors: Soichiro Takata, Shohei Kinoshita, Hirofumi Inoue, Shigeki Shinoda, Kenichiro Fujiyama, Takahiro Kumura, Shigeru Kasai, Nobuhiro Mikami
  • Publication number: 20170328803
    Abstract: Provided is a position estimation device and the like which accurately estimate an occurrence position of a pressure wave. The position estimation device is provided with: a first cross-correlation derivation means for deriving a first cross-correlation relating to a pressure of fluid based on measurement values obtained by measuring a pressure of fluid flowing through a pipeline network at least at two positions in the pipeline network, a second cross-correlation derivation means for deriving a second cross-correlation relating to a pressure of fluid based on calculation values obtained by calculating a pressure of fluid at least at the two positions in the pipeline network, and an estimation means for estimating an occurrence position of a pressure wave based on a difference between the first cross-correlation and the second cross-correlation.
    Type: Application
    Filed: November 24, 2015
    Publication date: November 16, 2017
    Applicant: NEC Corporation
    Inventors: Takahiro KUMURA, Soichiro TAKATA, Yasuhiro SASAKI
  • Publication number: 20170308635
    Abstract: An apparatus, method and the like which enables to represent a pipe network transporting a fluid by use of electrical circuit network is provided. The pipe network analysis apparatus includes; processing circuitry configured to receive a pipe network model that represents a pipe network being constituted by one or more piping elements, convert at least one piping element to an element of an electric circuit being configured to represent a non-linear relation between a pressure and a flow rate of the fluid in the piping elements by use of a relation between a voltage and a current, and generate a model representing an electric circuit network expressing the pipe network, by use of the element of the electric circuit; and an output device configured to provide the model analyzable by a specific electric circuit simulator.
    Type: Application
    Filed: October 20, 2015
    Publication date: October 26, 2017
    Applicant: NEC Corporation
    Inventors: Manabu KUSUMOTO, Yuichi NAKAMURA, Takahiro KUMURA
  • Publication number: 20170247863
    Abstract: In order to keep the deterioration of water distribution pipes from progressing, a tap water management system is provided with: a water pressure detection unit for detecting the water pressure in at least one location in a water distribution pipe for carrying clean water from a water distribution site to a consumer.
    Type: Application
    Filed: October 20, 2015
    Publication date: August 31, 2017
    Applicant: NEC Corporation
    Inventors: Dai KOBAYASHI, Takahiro KUMURA, Masatake TAKAHASHI
  • Patent number: 8990511
    Abstract: There is provided a cache synchronization control method by which contents of a plurality of caches can be synchronized without a programmer explicitly setting a synchronization point, and the contents of the caches can be synchronized without scanning all cache blocks. A cache synchronization control method for a multiprocessor that has a plurality of processors having a cache, and a storage device shared by the plurality of processors, the method comprises: before a task is executed, a first step of writing back input data of the task to the storage device by a processor that manages the task and deleting data corresponding to the input data from its own cache by a processor other than the processor; and after the task is executed, a second step of writing back output data of the task to the storage device by a processor that has executed the task and deleting data corresponding to the output data from its own cache by a processor other than the processor.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: March 24, 2015
    Assignee: NEC Corporation
    Inventor: Takahiro Kumura
  • Patent number: 8935512
    Abstract: It is possible to increase the processor instruction set design job efficiency and reduce workload on designers in investigation of an instruction set. An instruction operation code generation system includes an operation code bit width decision means, an instruction sorting means, and an operation code value decision means. The operation code bit width decision means decides a bit width that can be assigned for an operation code of each instruction according to specification data associated with a processor instruction set. The instruction sorting means sorts the instructions according to the operation code bit width. The operation code value decision means decides the value of the operation code of each instruction.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: January 13, 2015
    Assignee: NEC Corporation
    Inventor: Takahiro Kumura
  • Publication number: 20130318540
    Abstract: A data flow graph processing device that transforms a data flow graph including a loop structure into a pipeline operation capable of determining node execution order and judging whether or not executable, comprises: a delay node divider that divides a delay node included in t data flow graph into a value update node and a value output node; a dependency relation adder that adds dependency relations from the start node of the data flow graph to the value output node; and a hidden dependency relation adder that adds hidden dependency relations, indicating previous iteration and current iteration dependencies, from the value update node to the value output node.
    Type: Application
    Filed: February 1, 2012
    Publication date: November 28, 2013
    Applicant: NEC CORPORATION
    Inventor: Takahiro Kumura