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公开(公告)号：US20220283015A1
公开(公告)日：2022-09-08
申请号：US17637604
申请日：2019-11-20
Applicant: NEC CORPORATION
Inventor： Shohei KINOSHITA , Murtuza PETLADWALA , Shigeru KASAI , Eisuke SANEYOSHI
Abstract: A vehicle weight estimation apparatus 10 includes: a collecting unit 11 that collects vibration information indicating vibration output from a sensor 25 installed to a structure having a vibration-generating structure that generates vibration upon passage of a vehicle 30; an axle response extracting unit 12 that detects, by using the vibration information, axle responses indicating the passage of one or more axles of the vehicle 30 over the vibration-generating structure; an axle index calculating unit 13 that calculates axle indices corresponding to the individual axles based on the axle responses; a converting unit 14 that converts the axle indices into axle weights by referring to conversion information that is stored in advance and that indicates a relationship between axle indices and axle weights; and a vehicle weight calculating unit 15 that calculates the weight of the vehicle by totaling the axle weights of the individual axles.
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2.发明申请公开(公告)号：US20220205829A1
公开(公告)日：2022-06-30
申请号：US17613128
申请日：2019-05-30
Applicant: NEC CORPORATION
Inventor： Yu KIYOKAWA , Shigeru KASAI , Shohei KINOSHITA
Abstract: A weight estimation apparatus 1 includes: an impulsive force calculation unit 2 calculating an impulsive force using an acceleration response indicating vibration generated in a structure by the moving object (vehicle 27) moving through the structure, and a weight estimation unit 3 estimating a weight of the moving object using the impulsive force.
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3.发明申请公开(公告)号：US20190011402A1
公开(公告)日：2019-01-10
申请号：US16073420
申请日：2017-02-14
Applicant: NEC Corporation
Inventor： Shohei KINOSHITA , Shigeru KASAI
Abstract: Provided are an inspection device and the like capable of correctly determining a state of an inspection target without destroying the inspection target. An inspection device calculates vibration characteristic values representing a character of vibration information indicating vibrations measured by vibration sensors measuring a vibration of an inspection target; calculates a scattering degree indicating a scattering degree of the calculated vibration characteristic values among the vibrations measured by the vibration sensors; and determines a condition of the inspection target based on a magnitude of the calculated scattering degree.
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4.发明申请LEAKAGE POSITION CALCULATION DEVICE, LEAKAGE POSITION CALCULATION METHOD, COMPUTER-READABLE RECORDING MEDIUM, VIBRATION CALCULATION DEVICE, AND COMPUTATION DEVICE 审中-公开泄漏位置计算装置，泄漏位置计算方法，计算机可读记录介质，振动计算装置和计算装置公开(公告)号：US20160290886A1
公开(公告)日：2016-10-06
申请号：US15034909
申请日：2014-10-20
Applicant: NEC Corporation
Inventor： Soichiro TAKATA , Shigeru KASAI
Abstract: The present invention reduces production costs associated with a device that uses results of detection by a plurality of vibration detectors to detect a leakage position in a pipe.A first time difference calculation unit 114 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 made by a first vibration detection unit 112. A second time difference calculation unit 124 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 a measurement made by a second vibration detection unit 122. A leakage position calculation unit 130 uses the time differences Δt1, Δt2, and a space interval I between the first vibration detection unit 112 and the first time difference calculation unit 114 to calculate a leakage position in the pipe P.
Abstract translation: 第一时间差计算单元114通过处理结果来计算表示管P的第一振动模式的振动的检测定时与表示管P的第二振动模式的振动的检测定时之间的时间差Δt1 由第一振动检测单元112进行的测量。第二时间差计算单元124计算表示管P的第一振动模式的振动的检测定时和指示振动的检测定时的时间差Δt2 通过处理由第二振动检测单元122进行的测量的结果，管道P的第二振动模式。泄漏位置计算单元130使用时间差Δt1，Δt2和第一振动检测单元112之间的间隔I 和第一时间差计算单元114，以计算管道P中的泄漏位置。
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公开(公告)号：US20230184621A1
公开(公告)日：2023-06-15
申请号：US17802636
申请日：2020-03-12
Applicant: NEC Corporation
Inventor： Murtuza PETLADWALA , Shohei KINOSHITA , Shigeru KASAI , Reishi KONDO
CPC classification number: G01M5/0008 , G08G1/0116 , G08G1/0129 , G08G1/015 , G08G1/065 , G06F17/14
Abstract: Provided an apparatus including: a signal acquisition part that acquires an oscillation signal from a sensor that detects an oscillation induced in a target object; and an estimation part that obtains a feature value for each frame of the oscillation signal by applying Fourier transform to each frame extracted by a window of a predetermined length to calculate the feature value for the each frame in a frequency domain, and performs Gaussian mixture model-clustering on a time series of the feature values for respective frames to estimate one or more clusters, each of which is modeled with a Gaussian probability distribution best fit to the time series, and detect one or more events by detecting one or more corresponding clusters, a probability density value thereof greater than a predetermined threshold value.
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Patent Agency Ranking
公开(公告)号：US20230154314A1
公开(公告)日：2023-05-18
申请号：US17908597
申请日：2020-03-12
Applicant: NEC Corporation
Inventor： Murtuza PETLADWALA , Shohei KINOSHITA , Shigeru KASAI
CPC classification number: G08G1/0133 , G01V1/001 , G01V1/30 , G01V1/325 , G01V1/364
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.
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7.发明申请公开(公告)号：US20220136929A1
公开(公告)日：2022-05-05
申请号：US17435486
申请日：2020-01-16
Applicant: NEC Corporation
Inventor： Shohei KINOSHITA , Shigeru KASAI , Yu KIYOKAWA
IPC: G01M13/04
Abstract: A bearing diagnosis apparatus 1 that accurately diagnoses the state of a bearing includes: an extraction unit 2 configured to extract a feature amount using first index information indicating a response of a structure 21 to an external force and second index information indicating a response, to the external force, of a bearing 23 provided to the structure 21; and an assessment unit 3 configured to assess the state of the bearing 23 based on the extracted feature amount.
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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
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.
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9.发明申请公开(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.
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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.
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