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    MODEL GENERATION DEVICE FOR LIFE PREDICTION, MODEL GENERATION METHOD FOR LIFE PREDICTION, AND RECORDING MEDIUM STORING MODEL GENERATION PROGRAM FOR LIFE PREDICTION
    1.
    发明申请
    MODEL GENERATION DEVICE FOR LIFE PREDICTION, MODEL GENERATION METHOD FOR LIFE PREDICTION, AND RECORDING MEDIUM STORING MODEL GENERATION PROGRAM FOR LIFE PREDICTION 有权

    公开(公告)号：US20210048811A1

    公开(公告)日：2021-02-18

    申请号：US17052290

    申请日：2019-05-22

    Applicant: NEC CORPORATION

    Inventor： Soichiro TAKATA ,  Hirofumi INOUE ,  Junichiro MATAGA

    IPC: G05B23/02 ,  G06N7/00 ,  G06F16/2457 ,  G06F16/28

    Abstract: A model generation device for life prediction includes: an actual operation information generation unit that generates actual operation information indicating a relationship between a use time and a reliability of an object whose life is predicted, based on failure history information of the object by using an order-statistic calculation method; a probability distribution model generation unit that sets a number of division by which the use time is divided into periods, and then generates a probability distribution model that approximates the actual operation information for each of the periods obtained by dividing the use time; a calculation unit that calculates a goodness of fit of the probability distribution model to the actual operation information for each of the number of division by using an information criterion; and a determination unit that determines the probability distribution model at the number of division providing the highest goodness of fit.

    FLUID LEAKAGE DIAGNOSING DEVICE, FLUID LEAKAGE DIAGNOSING SYSTEM, FLUID LEAKAGE DIAGNOSING METHOD, AND RECORDING MEDIUM STORING FLUID LEAKAGE DIAGNOSING PROGRAM
    3.
    发明申请
    FLUID LEAKAGE DIAGNOSING DEVICE, FLUID LEAKAGE DIAGNOSING SYSTEM, FLUID LEAKAGE DIAGNOSING METHOD, AND RECORDING MEDIUM STORING FLUID LEAKAGE DIAGNOSING PROGRAM 有权

    公开(公告)号：US20210325005A1

    公开(公告)日：2021-10-21

    申请号：US17272394

    申请日：2019-09-02

    Applicant: NEC Corporation

    Inventor： Hirofumi INOUE ,  Shigeki SHINODA ,  Junichiro MATAGA ,  Katsumi KIKUCHI

    IPC: F17D5/06 ,  G01M3/24

    Abstract: A fluid leakage diagnosing device includes: when fluid leakage relating to a pipeline is being diagnosed by employing adaptive signal processing to suppress a component of a disturbance vibration contained in a vibration measured at a prescribed location in the pipeline, an acquiring unit that acquires distribution information that is associated with a characteristic of the pipeline and represents an actual distribution result of a value of a parameter in the adaptive signal processing when performance of suppressing the component of the disturbance vibration satisfies a criterion; an estimating unit that, based on the distribution information, estimates a probability density at which the value of the parameter with which the performance satisfies the criterion exists; and a determining unit that, based on the probability density estimated by the estimating unit, determines a range to search for the value of the parameter in the adaptive signal processing.

    SYSTEM IDENTIFICATION DEVICE, SYSTEM IDENTIFICATION METHOD, AND RECORDING MEDIUM
    4.
    发明申请
    SYSTEM IDENTIFICATION DEVICE, SYSTEM IDENTIFICATION METHOD, AND RECORDING MEDIUM 有权

    公开(公告)号：US20210010980A1

    公开(公告)日：2021-01-14

    申请号：US16970754

    申请日：2019-02-18

    Applicant: NEC Corporation

    Inventor： Soichiro TAKATA ,  Hirofumi INOUE ,  Shigeki SHINODA ,  Katsumi KIKUCHI

    IPC: G01N29/44 ,  G01N29/12 ,  G01M7/02

    Abstract: A system identification device 1 includes an analysis unit 105 that calculates a self-frequency response function on the basis of an input signal and an output signal measured by a measurement unit 103 at a position where a subject physical system 106 has been excited by a vibrating unit 102. The analysis unit 105 performs system identification of the subject physical system 106 by using an impulse response function obtained from the calculated self-frequency response function and an impulse response function of a virtual two-degrees-of-freedom model modeling the subject physical system 106 that is the subject of analysis. This makes it possible to perform system identification of systems with close eigenvalues.

    CONTROL APPARATUS, CONTROL METHOD, AND NON-TRANSITORY STORAGE MEDIUM
    5.
    发明申请
    CONTROL APPARATUS, CONTROL METHOD, AND NON-TRANSITORY STORAGE MEDIUM 有权

    公开(公告)号：US20230033538A1

    公开(公告)日：2023-02-02

    申请号：US17790927

    申请日：2020-01-21

    Applicant: NEC Corporation

    Inventor： Hirofumi INOUE ,  Shin Tominaga ,  Shigeki Shinoda ,  Yuzo Senda ,  Shigeru Sekine

    IPC: G07C1/02 ,  G07C11/00

    Abstract: A control apparatus (2000) computes a waiting time index value for each of a plurality of gates (20) for entering an area (10). The control apparatus (2000) detects, from among the plurality of gates (20), a first gate (20) and a second gate (20) of which relation between the waiting time index values satisfies a first criterion. Herein, the waiting time index value of the first gate (20) is greater than the waiting time index value of the second gate (20). The control apparatus (2000) causes a terminal (30) associated with the first gate (20) to output priority use information, which allows prioritized use of the second gate (20).

    ANALYZING DEVICE, ANALYSIS METHOD, AND STORAGE MEDIUM
    7.
    发明申请
    ANALYZING DEVICE, ANALYSIS METHOD, AND STORAGE MEDIUM 有权

    公开(公告)号：US20210164859A1

    公开(公告)日：2021-06-03

    申请号：US16632654

    申请日：2018-07-23

    Applicant: NEC Corporation

    Inventor： Shigeki SHINODA ,  Hirofumi INOUE ,  Takahiro KUMURA ,  Katsumi KIKUCHI

    IPC: G01M3/24 ,  E03B7/00 ,  F17D5/06

    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.

    LEAKAGE INSPECTION DEVICE, LEAKAGE INSPECTION METHOD, AND STORAGE MEDIUM
    8.
    发明申请
    LEAKAGE INSPECTION DEVICE, LEAKAGE INSPECTION METHOD, AND STORAGE MEDIUM 有权

    公开(公告)号：US20210116323A1

    公开(公告)日：2021-04-22

    申请号：US17056463

    申请日：2019-06-13

    Applicant: NEC CORPORATION

    Inventor： Shigeki SHINODA ,  Hirofumi INOUE ,  Junichiro MATAGA ,  Takahiro KUMURA ,  Katsumi KIKUCHI

    IPC: G01M3/24 ,  G01M3/22

    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.

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