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公开(公告)号：US10036684B2
公开(公告)日：2018-07-31
申请号：US15034027
申请日：2014-11-10
申请人： NEC CORPORATION
发明人： Shohei Kinoshita , Yasuhiro Sasaki , Nobuhiro Mikami , Masatake Takahashi , Shin Tominaga , Shigeki Shinoda , Soichiro Takata
摘要： In a related fluid leakage detecting device, erroneous leakage determination may occur due to a change in a state of a fluid in piping.A leakage determination system of the present invention includes a first detection means for detecting a prescribed physical quantity indicating a state of a fluid in piping, a second detection means for detecting vibration propagating through the piping, and a leakage determination means for performing leakage determination based on the physical quantity detected by the first detection means and the vibration detected by the second detection means.
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公开(公告)号：US20150276545A1
公开(公告)日：2015-10-01
申请号：US14431809
申请日：2013-09-13
申请人： NEC Corporation
CPC分类号： G01M5/0025 , F17D5/06 , G01M3/00 , G01M3/243 , G01M5/0033 , G01M7/02 , G01N29/04 , G01N29/28 , G01N29/341
摘要： The present invention provides a defect analysis device including: an excitation unit (107) that imparts vibrations of a plurality of frequencies to a fluid (110) flowing through a pipe (108); a first detector (106) that, when the excitation part (107) is imparting vibrations, detects vibrations emanating from the pipe (108); and a signal processing unit (101) that extracts a feature quantity from a vibration waveform acquired by the first detector (106), and uses the extracted feature quantity to estimate the extent of a defect formed in the pipe (108).
摘要翻译： 本发明提供了一种缺陷分析装置，包括：激励单元（107），其将多个频率的振动施加到流过管道（108）的流体（110）; 第一检测器（106），当所述激励部分（107）施加振动时，检测从所述管道（108）发出的振动; 以及从由第一检测器（106）获取的振动波形提取特征量的信号处理单元（101），并且使用所提取的特征量来估计在管道（108）中形成的缺陷的程度。
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3.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：US20150107363A1
公开(公告)日：2015-04-23
申请号：US14390185
申请日：2013-03-18
申请人： NEC Corporation
IPC分类号： G01H11/08
CPC分类号： G01H11/08 , G01P15/0922 , G01P15/097 , H01L41/081 , H01L41/0933
摘要： 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.
摘要翻译： 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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公开(公告)号：US11560698B2
公开(公告)日：2023-01-24
申请号：US16636982
申请日：2018-08-02
申请人： NEC CORPORATION
发明人： Masatake Takahashi , Manabu Kusumoto , Jun Sakai
IPC分类号： E03B7/07
摘要： A state analysis device is capable of determining a state of the interior of piping with high precision, and includes: an index calculation means for deriving an index indicating the state of the piping, based on a flow speed of fluid flowing out of the piping, and a fluid pressure of the interior of the piping at two or more locations of the piping; and a determination means for determining the state of the piping, based on the index.
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公开(公告)号：US10287756B2
公开(公告)日：2019-05-14
申请号：US15519896
申请日：2015-10-20
申请人： NEC Corporation
摘要： In order to keep the deterioration of water distribution pipes from progressing, a tap water management system is provided with: a water pressure detection unit for detecting the water pressure in at least one location in a water distribution pipe for carrying clean water from a water distribution site to a consumer. and transmitting the detection result as water pressure information; a deterioration detection unit for detecting deterioration in at least one location in a water distribution pipe, and transmitting the detection result as deterioration information; a water distribution planning unit for causing a water distribution plan that is a plan for water distribution pressure to be determined on the basis of information regarding past water demand; a deterioration-reducing water distribution planning unit for deciding, on the basis of the water distribution plan, the water pressure information, and the deterioration information. a deterioration-reducing water distribution plan according to the extent of deterioration; a water distribution pressure changing unit for changing the water distribution pressure of the water distribution pipe; and a water distribution pressure control unit for controlling the water distribution pressure changing unit on the basis of the deterioration-reducing water distribution plan.
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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：US09851331B2
公开(公告)日：2017-12-26
申请号：US14406242
申请日：2013-01-11
申请人： NEC CORPORATION
CPC分类号： G01N29/12 , G01M3/243 , G01M7/00 , G01N29/045 , G01N29/4436 , G01N2291/0258
摘要： Disclosed is a structure analyzing device and a structure analyzing method which can analyze a state change of a structure, which is caused before the structure is destroyed, such as a state change of degradation of the structure or the like. A structure analyzing device (10) includes a vibration detecting unit (11) which detects a vibration of a structure, and an analysis unit (12) which analyzes an output signal of the vibration detecting unit (11). The analysis unit (12) analyzes a state change of the structure by comparing a value of resonant sharpness Q, which is measured by use of the following formula (1) in a state existing when carrying out analysis, with a value of resonant sharpness Q which is measured by use of the following formula (1) in a standard state.
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公开(公告)号：US09759629B2
公开(公告)日：2017-09-12
申请号：US14431803
申请日：2013-09-27
申请人： NEC Corporation
摘要： A leak detection device is provided which comprises: in order to suppress effects of extraneous vibration and improve accuracy of leak detection, a first detection unit (6) which detects vibration in a first direction and output a first signal S1 representing a magnitude of the vibration in the first direction, the first detection unit (6) being installed to a pipe (2) in which fluid (5) flows; a second detection unit (7) which detects vibration in a second direction different from the first direction and output a second signal S2 representing a magnitude of the vibration in the second direction, the second detection unit (7) being installed to the pipe (2); and a signal processing unit (10) which performs an arithmetic operation processing using the first signal S1 and the second signal S2.
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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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