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    DAMAGE DETECTION APPARATUS, METHOD, AND PROGRAM
    3.
    发明申请
    DAMAGE DETECTION APPARATUS, METHOD, AND PROGRAM 有权

    公开(公告)号：US20210131930A1

    公开(公告)日：2021-05-06

    申请号：US16500140

    申请日：2017-04-07

    Applicant: NEC Corporation

    Inventor： Shohei KINOSHITA ,  Shigeru KASAI ,  Yu KIYOKAWA

    IPC: G01N3/06 ,  G01N3/56 ,  G05D19/02

    Abstract: The present invention provides a damage detection apparatus, a damage detection method, and a damage detection program that can detect damage in a support by measuring vibration of a supported object. The damage detection apparatus that detects damage in a structure including a supported object and a support according to one example embodiment of the present invention includes a dominant frequency acquisition unit that acquires a dominant frequency from vibration information at a plurality of points on the supported object; a rigid body vibration identification unit that identifies rigid body vibration information on the structure from the acquired dominant frequency; and a damage determination unit that determines damage in the support based on the identified rigid body vibration information.

    STRUCTURE DIAGNOSIS APPARATUS, STRUCTURE DIAGNOSIS METHOD, AND COMPUTER-READABLE RECORDING MEDIUM
    4.
    发明申请
    STRUCTURE DIAGNOSIS APPARATUS, STRUCTURE DIAGNOSIS METHOD, AND COMPUTER-READABLE RECORDING MEDIUM 有权

    公开(公告)号：US20220137003A1

    公开(公告)日：2022-05-05

    申请号：US17435482

    申请日：2020-01-16

    Applicant: NEC Corporation

    Inventor： Shohei KINOSHITA ,  Shigeru KASAI ,  Yu KIYOKAWA

    IPC: G01N29/12

    Abstract: A structure diagnosis apparatus 1 for diagnosing a state of a structure in which there is a small change in the natural frequency includes: a natural vibration extraction unit 2 configured to acquire, from a plurality of sensors 21 that a structure is provided with 20, vibration information indicating vibration generated in the structure 20, and extracting natural vibration using the vibration information; a spectral shape extraction unit 3 configured to extract spectral shape information indicating a shape of a spectrum using the natural vibration; an index calculation unit 4 for calculating an index indicating a relationship between the spectral shape information and reference spectral shape information that is a preset reference; and a state estimation unit 5 for estimating the state of the structure based on the index.

    DIAGNOSIS APPARATUS, DIAGNOSIS METHOD, AND COMPUTER-READABLE RECORDING MEDIUM
    5.
    发明申请
    DIAGNOSIS APPARATUS, DIAGNOSIS METHOD, AND COMPUTER-READABLE RECORDING MEDIUM 有权

    公开(公告)号：US20210231617A1

    公开(公告)日：2021-07-29

    申请号：US15734782

    申请日：2018-06-05

    Applicant: NEC CORPORATION

    Inventor： Yu KIYOKAWA ,  Shigeru KASAI ,  Shohei KINOSHiTA

    IPC: G01N29/12

    Abstract: A diagnosis apparatus 1 including: a target vibration information generation unit 2 that generates pieces of target vibration information; a comparative relationship information generation unit 3 that generates pieces of comparative relationship information indicating relationships among the pieces of target vibration information, or the pieces of comparative relationship information indicating relationships among pieces of reference vibration information and the pieces of target vibration information, the pieces of reference vibration information indicating vibrations in the target mode among vibrations that are measured in a reference period; and a diagnosis unit 5 that diagnoses that a change has occurred in the structure 20 between the diagnosis period and the reference period based on a result of comparison between a distribution of pieces of reference relationship information and the distribution that has been calculated in relation to the pieces of comparative relationship information.

    DAMAGE DIAGNOSIS DEVICE, DAMAGE DIAGNOSIS METHOD, AND RECORDING MEDIUM IN WHICH DAMAGE DIAGNOSIS PROGRAM IS STORED
    6.
    发明申请
    DAMAGE DIAGNOSIS DEVICE, DAMAGE DIAGNOSIS METHOD, AND RECORDING MEDIUM IN WHICH DAMAGE DIAGNOSIS PROGRAM IS STORED 有权

    公开(公告)号：US20210172828A1

    公开(公告)日：2021-06-10

    申请号：US16769869

    申请日：2018-12-03

    Applicant: NEC Corporation

    Inventor： Shohei KINOSHITA ,  Shigeru KASAI ,  Yu KIYOKAWA

    IPC: G01M7/02 ,  G01G19/02 ,  G01P15/00 ,  G01J5/00

    Abstract: A damage diagnosis device is provided with: a detection unit for detecting that, immediately after a vehicle crossing a bridge has exited from the bridge, another vehicle is not crossing the bridge; a determination unit for determining whether the weight of the vehicle satisfies a criterion; and a diagnosis unit that, when the detection unit has detected that no other vehicle is crossing the bridge and the determination unit has determined that the weight of the vehicle satisfies the criterion, diagnoses damage to the bridge on the basis of information representing free vibration generated in the bridge due to the crossing of the vehicle, thereby improving the precision of diagnosis when damage to a bridge is diagnosed on the basis of information representing free vibration generated in the bridge due to the crossing of a vehicle.

    VIBRATION DETERMINATION DEVICE, VIBRATION DETERMINATION METHOD, AND PROGRAM
    7.
    发明申请
    VIBRATION DETERMINATION DEVICE, VIBRATION DETERMINATION METHOD, AND PROGRAM 审中-公开

    公开(公告)号：US20200278241A1

    公开(公告)日：2020-09-03

    申请号：US16648092

    申请日：2017-09-21

    Applicant: NEC CORPORATION

    Inventor： Yu KIYOKAWA ,  Shigeru KASAI ,  Shohei KINOSHITA

    IPC: G01H17/00

    Abstract: A vibration determination device according to an exemplary aspect of the present invention includes: at least one memory storing a set of instructions; and at least one processor configured to execute the set of instructions to: determine, based on a plurality of feature values representing features of a vibration of a structure, whether the vibration of the structure is a standard vibration; and detect, when it is not determined that the vibration of the structure is the standard vibration, an outlier included in the plurality of feature values; determine, based on the plurality of feature values other than the detected outlier, whether the vibration of the structure is the standard vibration; and output whether the vibration of the structure is the standard vibration.

    MODEL GENERATION METHOD, MODEL GENERATION APPARATUS, AND PROGRAM
    9.
    发明申请
    MODEL GENERATION METHOD, MODEL GENERATION APPARATUS, AND PROGRAM 有权

    公开(公告)号：US20220335964A1

    公开(公告)日：2022-10-20

    申请号：US17763374

    申请日：2019-10-15

    Applicant: NEC Corporation

    Inventor： Yu KIYOKAWA

    IPC: G10L21/0208 ,  G10L15/06

    Abstract: A model generation apparatus according to the present invention includes: a data generating unit configured to generate, from actual data of acoustic data, replacement data obtained by replacing a predetermined value in the actual data with a replacement value that is a different value from the predetermined value; and a learning unit configured to learn by using the actual data of the acoustic data and the replacement data, and generate a model for removing noise from predetermined acoustic data.

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