公开(公告)号：US20210293861A1

公开(公告)日：2021-09-23

申请号：US17262518

申请日：2018-07-23

Applicant: NEC Corporation

Inventor： Shingo TAKAHASHI ,  Shigeru KOUMOTO ,  Ryota SUZUKI ,  Murtuza PETLADWALA

IPC: G01R19/25 ,  G01R23/16

Abstract: Provided a method including applying a Fourier Transform to an AC current waveform measured to perform conversion thereof to a frequency domain; adjusting entire phase components of frequency spectra obtained as a result of the Fourier Transform, such that a phase component of an AC power supply frequency becomes zero; and applying an inverse Fourier Transform to the frequency spectra with the entire phase components thereof adjusted to obtain a current waveform in a time domain.

公开(公告)号：US20190187736A1

公开(公告)日：2019-06-20

申请号：US16326963

申请日：2017-08-17

Applicant: NEC Corporation

Inventor： Takahiro TOIZUMI ,  Ryota SUZUKI ,  Shigeru KOUMOTO

IPC: G05F1/70 ,  G01R23/20 ,  G01R21/133 ,  G01R19/25

CPC classification number: G05F1/70 ,  G01R19/2509 ,  G01R19/2513 ,  G01R21/00 ,  G01R21/133 ,  G01R23/20 ,  H02J13/00

Abstract: A state change feature value relating to power supply current waveform data is extracted, and a transition state is detected, for a section of the waveform data, based on a magnitude of a state change feature value extracted.

公开(公告)号：US20180120363A1

公开(公告)日：2018-05-03

申请号：US15562233

申请日：2016-01-08

Applicant: NEC CORPORATION

Inventor： Takahiro TOIZUMI ,  Eisuke SANEYOSHI ,  Ryota SUZUKI ,  Shigeru KOUMOTO

IPC: G01R21/133

CPC classification number: G01R21/133

Abstract: In order to solve the above-described problem, there is provided a data processing device (1) including a measurement data acquisition unit (10) that acquires measurement data indicating a temporal change in at least one of current consumption and power consumption of an electrical apparatus, a fluctuation component extraction unit (20) that extracts a fluctuation component related to fluctuation in the current consumption and a fluctuation component related to fluctuation in the power consumption from the measurement data, and a feature value acquisition unit (30) that acquires a feature value of the fluctuation component.

公开(公告)号：US20210373543A1

公开(公告)日：2021-12-02

申请号：US17263734

申请日：2018-08-03

Applicant: NEC Corporation

Inventor： Murtuza PETLADWALA ,  Shingo TAKAHASHI ,  Shigeru KOUMOTO

IPC: G05B23/02 ,  G06N20/00

Abstract: Provided an apparatus configured to calculate a periodicity of the time series data using at least one of a periodogram of the time series data and an autocorrelation of the time series data; generate a plurality of subsequences from the time series data, a length of each subsequence set to the periodicity, calculate feature values of the plurality of subsequences, and categorize the plurality of subsequences, based on the features values thereof, into one or more groups; and execute analysis of the time series data, based on the categorization result.

公开(公告)号：US20210278832A1

公开(公告)日：2021-09-09

申请号：US16314239

申请日：2017-06-28

Applicant: NEC CORPORATION

Inventor： Shigeru KOUMOTO ,  Rie IWASAKI ,  Eisuke SANEYOSHI ,  Akira SHOUJIGUCHI ,  Takahiro TOIZUMI ,  Ryota SUZUKI

IPC: G05B23/02 ,  G05B19/418

Abstract: A maintenance plan formulation device includes: a failure sign detection unit that acquires a state of at least an apparatus and detects an abnormality indicating a sign that appears before a failure of the apparatus occurs; a maintenance limit timing calculation unit that calculates a maintenance limit timing that indicates a limit of a maintenance timing of the apparatus with the abnormality thereof being detected; a maintenance timing calculation unit that calculates a maintenance timing of the apparatus based on the maintenance limit timing of the apparatus; and a maintenance timing output part that outputs the maintenance timing to a display apparatus.

公开(公告)号：US20210097417A1

公开(公告)日：2021-04-01

申请号：US16635282

申请日：2017-08-03

Applicant: NEC Corporation

Inventor： Murtuza PETLADWALA ,  Ryota SUZUKI ,  Shigeru KOUMOTO

IPC: G06N7/00 ,  G06N20/00 ,  G06K9/62

Abstract: Provided an apparatus that receives time series data from a data storage unit storing time series of sample data or feature values calculated from the sample data, computes a measure indicating change and repetition characteristics of the time series data, based on sample value distribution thereof, selects a state model structure to be used for model learning and estimation, from state models including a fully connected state model and a one way direction state model, based on the measure and stores the selected state model in a model storage unit.

公开(公告)号：US20210026534A1

公开(公告)日：2021-01-28

申请号：US17043099

申请日：2019-03-29

Applicant: NEC CORPORATION

Inventor： Shigeru KOUMOTO

IPC: G06F3/06

Abstract: A determination part of the data storage apparatus performs control such that when at least a part of a first data block stored in a first storage part satisfies a first criterion, the first data block and a predetermined number of data blocks after the first data block in the first storage part are forwarded to the second storage part for storage, and when there is data that satisfies a second criterion from the first to the predetermined number data blocks, the first storage part continue to store data blocks following the data block corresponding to the predetermined number and stored in the first storage part in the second storage part, while when there is no data that satisfies the predetermined second criterion, the first storage part is caused to stop storing a data block stored in the first storage part in the second storage part.

公开(公告)号：US20200379020A1

公开(公告)日：2020-12-03

申请号：US16961417

申请日：2018-01-17

Applicant: NEC Corporation

Inventor： Shigeru KOUMOTO

IPC: G01R19/25 ,  G08C15/06

Abstract: A measurement apparatus that measures a facility of a measurement target and that is able to transmit measurement data as intermittent data and an analysis apparatus. An analysis apparatus includes: a communication part that receives the intermittent data from the measurement apparatus; and an analysis part that estimates a standard data pattern serving as a reference, based on a common portion between a pair of the data in a set of the intermittent data received and determines presence of an anomaly for intermittent data of a determination target received from the measurement apparatus by referring to the standard data pattern.

公开(公告)号：US20200058081A1

公开(公告)日：2020-02-20

申请号：US16344881

申请日：2017-10-30

Applicant: NEC Corporation

Inventor： Eisuke SANEYOSHI ,  Shigeru KOUMOTO ,  Akira SHOUJIGUCHI ,  Rie IWASAKI ,  Takahiro TOIZUMI ,  Ryota SUZUKI

IPC: G06Q50/04 ,  G06Q10/00 ,  G06Q10/06 ,  G05B19/406

Abstract: There are provided a repair determination section that determines, based on failure information on the facility for manufacturing a product, a repair time required to repair the facility, and a recovery plan creation section that creates a recovery plan in accordance with a predetermined production evaluation indicator, based on the repair time and production information on a line with the failed facility, one or more other facilities, and on one or more other lines.

公开(公告)号：US20180088158A1

公开(公告)日：2018-03-29

申请号：US15562540

申请日：2016-01-08

Applicant: NEC CORPORATION

Inventor： Takahiro TOIZUMI ,  Eisuke SANEYOSHI ,  Ryota SUZUKI ,  Shigeru KOUMOTO

IPC: G01R21/06 ,  G06Q50/06 ,  G06N5/04 ,  G06F15/18

Abstract: As means for solving the above-described problem, there is provided a data processing device (1) including a measurement data acquisition unit (10) that acquires measurement data indicating a temporal change in at least one of current consumption and power consumption of an electrical apparatus, a reference component extraction unit (20) that extracts a reference component of the current consumption and a reference component of the power consumption from the measurement data, and a feature value acquisition unit (30) that acquires a feature value of each reference component.