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公开(公告)号：US11614205B2
公开(公告)日：2023-03-28
申请号：US16078133
申请日：2017-02-16
Applicant: NEC Corporation
Inventor： Soichiro Takata , Takahiro Kumura , Kanta Miyake , Shin Tominaga , Hirofumi Inoue , Shigeki Shinoda
Abstract: A piping diagnostic device according to an exemplary aspect of the present invention includes: criteria distribution generating means for generating a criteria distribution that is statistical data of criteria data of piping based on construction information about the piping, design information about the piping, and material information about the piping; changed-state distribution generating means for generating a changed-state distribution that is statistical data of changed-state data of the piping that have changed due to aging based on at least either vibration or dynamic pressure of the piping that have changed due to aging; measurement means for measuring at least either vibration or dynamic pressure of the piping; and determining means for determining deterioration of the piping based on the criteria distribution, the changed-state distribution, and at least either vibration or dynamic pressure of the piping.
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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
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.
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Patent Agency Ranking
公开(公告)号：US09970840B2
公开(公告)日：2018-05-15
申请号：US14430258
申请日：2013-08-19
Applicant: NEC Corporation
Inventor： Shigeki Shinoda , Yasuhiro Sasaki , Masatake Takahashi , Junichiro Mataga , Soichiro Takata
CPC classification number: G01M3/2807 , F17D5/06 , G01M3/243
Abstract: 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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4.发明申请公开(公告)号：US20170343514A1
公开(公告)日：2017-11-30
申请号：US15537943
申请日：2016-01-13
Applicant: NEC Corporation
Inventor： Soichiro Takata , Shohei Kinoshita , Hirofumi Inoue , Shigeki Shinoda , Kenichiro Fujiyama , Takahiro Kumura , Shigeru Kasai , Nobuhiro Mikami
CPC classification number: G01N29/045 , G01H13/00 , G01N29/048 , G01N29/07 , G01N2291/011 , G01N2291/0258 , G01N2291/0421 , G01N2291/0426 , G01N2291/0428 , G01N2291/2634
Abstract: Degradation of a pipe can be easily detected. A piping inspection system 1 includes an excitation unit 100, a wave detection unit 210, and a diagnosis unit 220. The excitation unit 100 excites waves of different wave modes simultaneously at a first position of a pipe 300. The wave detection unit 210 detects the waves of different wave modes at a second position of the pipe 300. The diagnosis unit 220 diagnoses degradation of the pipe 300 based on a velocity of one of the waves of different wave modes, the velocity being calculated by using a detection time difference between the waves of different wave modes.
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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
Applicant: NEC CORPORATION
Inventor： Shohei Kinoshita , Yasuhiro Sasaki , Nobuhiro Mikami , Masatake Takahashi , Shin Tominaga , Shigeki Shinoda , Soichiro Takata
Abstract: 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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6.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
Applicant: NEC Corporation
Inventor： Shigeki Shinoda , Yasuhiro Sasaki , Masatake Takahashi , Junichiro Mataga , Soichiro Takata
IPC: G01M3/28
CPC classification number: G01M3/2807 , F17D5/06 , G01M3/243
Abstract: 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.
Abstract translation: 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
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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