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    Vehicle detection apparatus, method and program
    1.
    发明授权
    Vehicle detection apparatus, method and program 有权

    公开(公告)号：US12236777B2

    公开(公告)日：2025-02-25

    申请号：US17908597

    申请日：2020-03-12

    Applicant: NEC Corporation

    Inventor： Murtuza Petladwala ,  Shohei Kinoshita ,  Shigeru Kasai

    IPC: G08G1/01 ,  G01V1/00 ,  G01V1/30 ,  G01V1/32 ,  G01V1/36

    Abstract: An apparatus includes a signal acquisition part acquires oscillation signals from sensors provided under lanes of a bridge and close to an expansion joint, a signal separation part applies BSS to the oscillation signals to estimate source oscillation signals respectively separated in the plurality of lanes, and adjusts amplitude of the source oscillation signals to output amplitude adjusted oscillation signals, and a vehicle estimation part estimates, from the amplitude adjusted oscillation signal, a response oscillation due to a vehicle passing on the lane of interest to detect and count vehicles passing on the lane.

    ABNORMALITY ESTIMATION APPARATUS, ABNORMALITY ESTIMATION METHOD, AND COMPUTER-READABLE RECORDING MEDIUM
    2.
    发明申请
    ABNORMALITY ESTIMATION APPARATUS, ABNORMALITY ESTIMATION METHOD, AND COMPUTER-READABLE RECORDING MEDIUM 有权

    公开(公告)号：US20230054215A1

    公开(公告)日：2023-02-23

    申请号：US17797288

    申请日：2020-02-19

    Applicant: NEC Corporation

    Inventor： Sakiko Mishima ,  Shigeru Kasai ,  Shohei Kinoshita

    IPC: G01M5/00

    Abstract: An abnormality estimation apparatus 10 includes: a detection unit 11 configured to detect a vibration response when a vehicle passes over an expansion and contraction apparatus 23, using vibration information indicating vibration that occurs in a bridge; a first index calculation unit 12 configured to calculate a first index for determining the presence or absence of an abnormality in the expansion and contraction apparatus 23, using the vibration response; and an estimation unit 13 configured to estimate the presence or absence of an abnormality in accordance with a change in the first index.

    Damage diagnosis device, damage diagnosis method, and recording medium in which damage diagnosis program is stored
    4.
    发明授权
    Damage diagnosis device, damage diagnosis method, and recording medium in which damage diagnosis program is stored 有权

    公开(公告)号：US11579040B2

    公开(公告)日：2023-02-14

    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 ,  G01J5/00 ,  G01P15/00

    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.

    Leakage position calculation device, leakage position calculation method, computer-readable recording medium, vibration calculation device, and computation device
    5.
    发明授权
    Leakage position calculation device, leakage position calculation method, computer-readable recording medium, vibration calculation device, and computation device 有权

    公开(公告)号：US10119880B2

    公开(公告)日：2018-11-06

    申请号：US15034909

    申请日：2014-10-20

    Applicant: NEC Corporation

    Inventor： Soichiro Takata ,  Shigeru Kasai

    IPC: G01M3/00 ,  G01M3/24 ,  G01M7/02

    Abstract: A first time difference calculation unit calculates a time difference Δt1 between the timing of detection of vibration that indicates the first vibration mode of a pipe P and the timing of detection of vibration that indicates a second vibration mode of the pipe P by processing a result of a measurement . A second time difference calculation unit calculates a time difference Δt2 between the timing of detection of vibration that indicates the first vibration mode of the pipe P and the timing of detection of vibration that indicates the second vibration mode of the pipe P by processing a result of another measurement. A leakage position calculation unit uses the time differences Δt1, Δt2, and a space interval I between the first vibration detection unit and the first time difference calculation unit to calculate a leakage position in the pipe P.

    Structure diagnosis apparatus, structure diagnosis method, and computer-readable recording medium
    7.
    发明授权
    Structure diagnosis apparatus, structure diagnosis method, and computer-readable recording medium 有权

    公开(公告)号：US12111291B2

    公开(公告)日：2024-10-08

    申请号：US17435482

    申请日：2020-01-16

    Applicant: NEC Corporation

    Inventor： Shohei Kinoshita ,  Shigeru Kasai ,  Yu Kiyokawa

    IPC: G01N29/12 ,  G01H17/00 ,  G01N29/14 ,  G01N29/46

    CPC classification number: G01N29/12 ,  G01N2291/0289

    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.

    Assessing device, assessing system, assessing method, and computer-readable recording medium
    8.
    发明授权
    Assessing device, assessing system, assessing method, and computer-readable recording medium 有权

    公开(公告)号：US11029231B2

    公开(公告)日：2021-06-08

    申请号：US16341488

    申请日：2017-10-20

    Applicant: NEC Corporation

    Inventor： Shohei Kinoshita ,  Shigeru Kasai

    IPC: G01M7/02 ,  G01N29/07

    Abstract: An assessing device capable of assessing presence or absence of local damage in a structure is provided. The assessing device includes a dominant frequency identifying unit that identifies a dominant frequency of a vibration at each of a plurality of spots in a structure, based on information indicating the vibration at each of the plurality of spots, a phase difference identifying unit that identifies a phase difference at the dominant frequency between the vibrations at the plurality of spots, based on the dominant frequency and information indicating the vibrations; and an assessing unit that assesses damage in the structure, based on the phase difference.

    PIEZOELECTRIC VIBRATION SENSOR
    9.
    发明申请
    PIEZOELECTRIC VIBRATION SENSOR 审中-公开
    压电振动传感器

    公开(公告)号：US20150107363A1

    公开(公告)日：2015-04-23

    申请号：US14390185

    申请日：2013-03-18

    Applicant: NEC Corporation

    Inventor： Masatake Takahashi ,  Shigeki Shinoda ,  Soichiro Takata ,  Shigeru Kasai ,  Yasuhiro Sasaki

    IPC: G01H11/08

    CPC classification number: G01H11/08 ,  G01P15/0922 ,  G01P15/097 ,  H01L41/081 ,  H01L41/0933

    Abstract: A piezoelectric vibration sensor includes a piezoelectric element which is in a form of flat plate, an element holding plate which is in a form of flat plate, and first and second support members. An electrode is arranged on at least one plane of the piezoelectric element. The piezoelectric element is joined to one plane of the piezoelectric element. The first support member and the second support member support the piezoelectric element and the element holding plate. A vibration film activates vibration of the element holding plate between the first support member and the second support member. Moreover, the element holding plate is joined to each of the first support member and the second support member through the vibration film. As a result, it is possible to obtain high sensitivity in a wide frequency range and to withstand an impact which is added from the outside.

    Abstract translation: 压电振动传感器包括平板形式的压电元件，平板形式的元件保持板以及第一和第二支撑构件。 电极布置在压电元件的至少一个平面上。 压电元件接合到压电元件的一个平面。 第一支撑构件和第二支撑构件支撑压电元件和元件保持板。 振动膜激活元件保持板在第一支撑构件和第二支撑构件之间的振动。 此外，元件保持板通过振动膜连接到第一支撑构件和第二支撑构件中的每一个。 结果，可以在宽的频率范围内获得高灵敏度并且能够承受从外部添加的冲击。

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