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1.发明申请公开(公告)号：US20150253216A1
公开(公告)日：2015-09-10
申请号：US14430258
申请日：2013-08-19
申请人： NEC Corporation
IPC分类号： G01M3/28
CPC分类号： G01M3/2807 , F17D5/06 , G01M3/243
摘要： Each functional configuring unit of a leak inspection device (2000) operates in the manner that follows. A vibration acquisition unit (2020) acquires a signal indicating tubing vibrations or vibrations propagated from tubing. A filtering unit (2040) extracts a signal of a predetermined frequency band from the signal acquired by the vibration acquisition unit (2020). A characteristic value extraction unit (2060) splits the signal extracted by the filtering unit (2040) into predetermined time intervals, calculates for each split signal the absolute value of each extreme value of the magnitude of the signal, performs for each split signal a statistical process with respect to the calculated plurality of absolute values, and considers values calculated by the statistical process to be characteristic values. A leak determination unit (2080) considers inspection results to indicate the presence of a leak when a determination index value stipulated using the characteristic values is greater than a predetermined threshold.
摘要翻译： 泄漏检查装置（2000）的各功能构成单元按照以下的方式进行动作。 振动获取单元（2020）获取指示管道振动或从管道传播的振动的信号。 滤波单元（2040）从由振动获取单元获取的信号（2020）提取预定频带的信号。 特征值提取单元（2060）将由滤波单元（2040）提取的信号分割成预定的时间间隔，针对每个分割信号计算信号幅度的每个极值的绝对值，对每个分割信号执行统计 对所计算的多个绝对值进行处理，并将通过统计处理计算出的值视为特征值。 当使用特征值规定的确定指标值大于预定阈值时，泄漏确定单元（2080）考虑检查结果以指示泄漏的存在。
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公开(公告)号：US09970840B2
公开(公告)日：2018-05-15
申请号：US14430258
申请日：2013-08-19
申请人： NEC Corporation
CPC分类号： G01M3/2807 , F17D5/06 , G01M3/243
摘要： Each functional configuring unit of a leak inspection device (2000) operates in the manner that follows. A vibration acquisition unit (2020) acquires a signal indicating tubing vibrations or vibrations propagated from tubing. A filtering unit (2040) extracts a signal of a predetermined frequency band from the signal acquired by the vibration acquisition unit (2020). A characteristic value extraction unit (2060) splits the signal extracted by the filtering unit (2040) into predetermined time intervals, calculates for each split signal the absolute value of each extreme value of the magnitude of the signal, performs for each split signal a statistical process with respect to the calculated plurality of absolute values, and considers values calculated by the statistical process to be characteristic values. A leak determination unit (2080) considers inspection results to indicate the presence of a leak when a determination index value stipulated using the characteristic values is greater than a predetermined threshold.
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公开(公告)号：US20150236610A1
公开(公告)日：2015-08-20
申请号：US14431817
申请日：2013-08-16
申请人： NEC Corporation
CPC分类号： H02M7/06 , G01H11/08 , G01M3/00 , G01M3/243 , G01N29/223 , G01N2291/0289
摘要： A vibration sensor unit (100) includes a metal casing (11), a vibration sensor (12) disposed in the casing (11), a battery (15), and a control unit (13). The control unit (13) applies power supplied from the battery (15) to the casing (11) to apply charges to the casing (11), and controls an amount of power applied to the casing (11).
摘要翻译： 振动传感器单元（100）包括金属壳体（11），设置在壳体（11）中的振动传感器（12），电池（15）和控制单元（13）。 控制单元（13）将从电池（15）供应的电力施加到壳体（11）以向壳体（11）施加电荷，并且控制施加到壳体（11）的功率量。
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公开(公告)号：US09921097B2
公开(公告)日：2018-03-20
申请号：US14429849
申请日：2013-09-27
申请人： NEC Corporation
摘要： A sensor device includes: a first sensor group (13) in which a plurality of first vibration sensors for detecting vibration acceleration in one direction with respect to an object to be detected are arranged to face the same direction; a phase difference calculation unit (220) which, based on a plurality of first signals indicating the vibration acceleration detected by each of the plurality of first vibration sensors included in the first sensor group (13), calculates a first phase difference indicating the phase difference between the plurality of first signals; and an acceleration calculation unit (230) which, using the first phase difference and the plurality of first signals, calculates vibration acceleration in a first direction perpendicular to a surface on which the plurality of first vibration sensors are arranged, and vibration acceleration in a second direction parallel to the surface on which the plurality of first vibration sensors are arranged.
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公开(公告)号：US20150204726A1
公开(公告)日：2015-07-23
申请号：US14416686
申请日：2013-03-04
申请人： NEC Corporation
CPC分类号： G01J5/0025 , G01J5/026 , G01J5/0806 , G01J5/0862 , G01J5/10 , G01J5/34 , G01J2001/4433 , G01J2005/106 , G01V8/00
摘要： An infrared detection device that can detect movement, a temperature, and a stationary state of a detection object with a simple configuration is provided.The infrared detection device includes a pyroelectric infrared sensor (11), peak detecting means (12) for an electric signal waveform, peak inclination amount detecting means (13) for an electric signal waveform, peak value holding means (14) for an electrical signal waveform, and determining means (15), the sensor (11) outputs an electric signal depending on change in an infrared ray resulting from a detection object, the peak detecting means (12) detects a peak of a temporal waveform of an electric signal output by the sensor (11), the peak inclination amount detecting means (13) detects an inclination amount of a peak detected by the peak detecting means (12), the peak value holding means (14) holds an initial peak value when the detection object enters a detection region of the sensor (11), for a peak detected by the peak detecting means (12), and the determining means (15) determines entry of the detection object to and exit of the detection object from the detection region, a movement speed and a temperature of the detection object, and movement and motionlessness of the detection object in the detection region.
摘要翻译： 提供了能够以简单的结构检测检测对象的移动，温度和静止状态的红外线检测装置。 红外线检测装置包括热电式红外线传感器（11），用于电信号波形的峰值检测装置（12），用于电信号波形的峰值倾斜量检测装置（13），用于电信号的峰值保持装置 波形和确定装置（15），传感器（11）根据检测对象产生的红外线的变化输出电信号，峰值检测装置（12）检测电信号输出的时间波形的峰值 通过传感器（11），峰值倾斜量检测装置（13）检测由峰值检测装置（12）检测的峰值的倾斜量，峰值保持装置（14）保持检测对象 进入传感器（11）的检测区域，以检测由峰值检测装置（12）检测到的峰值，并且确定装置（15）确定检测对象从检测区域进入和退出检测对象， mov 检测对象的检测对象的速度和温度，检测对象的移动和静止。
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公开(公告)号：US11703189B2
公开(公告)日：2023-07-18
申请号：US17272394
申请日：2019-09-02
申请人： NEC Corporation
摘要： 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.
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7.发明授权公开(公告)号：US10823705B2
公开(公告)日：2020-11-03
申请号：US15329124
申请日：2015-07-29
申请人： NEC Corporation
摘要： This invention provides the following: a diagnostic device that may, with a simple design, diagnose the condition of a wide area of a structure such as a pipe; and the like. The diagnostic device 100 has a determining means for determining the condition of the structure on the basis of the speed of sound therein.
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公开(公告)号：US10458878B2
公开(公告)日：2019-10-29
申请号：US15315907
申请日：2015-06-11
申请人： NEC Corporation
IPC分类号： G01M3/24 , G01N29/14 , G01N29/032 , G01N29/42 , G01N29/44
摘要： Provided are a position determination device and the like which determine vibration measurement positions for specifying a leak position.A position determination device 100 includes a feature amount extraction unit which extracts feature amounts relating to detected pipe vibrations respectively on the basis of the pipe vibrations detected by a plurality of detection units, and a measurement position determination unit which determines measurement positions of at least two of the detection units on the basis of the feature amounts.
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公开(公告)号：US10156493B2
公开(公告)日：2018-12-18
申请号：US15319606
申请日：2015-06-11
申请人： NEC Corporation
摘要： Provided are a position determination device and the like for determining a mounting position of a sensor suitable for detecting leakage vibration of a pipe. A position determination device (100) includes a frequency determination unit for determining a frequency of vibration propagating through a pipe and a structure attached to the pipe and a mounting position determination unit for determining, on the basis of the determined frequency, a mounting position of a sensor for detecting vibration of the pipe.
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公开(公告)号：US09709488B2
公开(公告)日：2017-07-18
申请号：US14917725
申请日：2014-06-26
申请人： NEC Corporation
IPC分类号： G01J3/40 , G01N21/41 , G01J3/36 , G02B5/32 , H01L31/0232 , H04N9/04 , G01J3/18 , G01J5/02 , G02B3/00 , G01J3/28
CPC分类号： G01N21/41 , G01J3/1838 , G01J3/36 , G01J5/02 , G01J2003/2813 , G01N2201/068 , G02B3/0056 , G02B3/0087 , G02B5/32 , H01L31/0232 , H04N9/045 , H04N2209/042
摘要： A sensor unit (100) provided with a substrate (101), a plurality of light-receiving units (102) that are provided on the substrate (101) and detect light, and a diffraction grating layer (103) that is provided on the substrate (101) and the light-receiving units (102) and has at least two diffraction means for diffracting light of corresponding wavelengths and condensing the light onto the light-receiving units, wherein at least two of the diffraction means are composed from holograms formed on a first diffraction grating layer and at least a portion of the plurality of holograms formed on the first diffraction grating layer overlap at least partially with another adjacent hologram.
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