Method and system for assessing insulation deterioration in live underground power cables
    1.
    发明授权
    Method and system for assessing insulation deterioration in live underground power cables 有权
    用于评估地下电力电缆绝缘劣化的方法和系统

    公开(公告)号:US08847606B2

    公开(公告)日:2014-09-30

    申请号:US13152162

    申请日:2011-06-02

    摘要: A method for assessing insulation deterioration in a live underground power cable may include, in one embodiment, attaching a coupling device to a live underground power cable and using the coupling device to couple a test signal onto the power cable. The power cable may carry a normal AC power signal at a first frequency, while the test signal may have a second frequency different from the first frequency. The test signal may be detected after it has traveled a distance along the power cable. It may then be analyzed to determine a change in velocity and/or attenuation of the test signal as a function of the normal AC power signal. The severity of water trees in the power cable may be inferred based on the magnitude of the change.

    摘要翻译: 在一个实施例中,用于评估活地下电力电缆中的绝缘劣化的方法可以包括将耦合装置附接到活地下电力电缆并且使用耦合装置将测试信号耦合到电力电缆上。 电力电缆可以以第一频率携带正常的交流电力信号,而测试信号可以具有与第一频率不同的第二频率。 在沿着电力电缆行进一段距离之后,可以检测测试信号。 然后可以对其进行分析,以确定作为正常AC功率信号的函数的测试信号的速度和/或衰减的变化。 电力电缆中水木的严重性可以根据变化的大小来推断。

    Method and System for Assessing Insulation Deterioration in Live Underground Power Cables
    2.
    发明申请
    Method and System for Assessing Insulation Deterioration in Live Underground Power Cables 有权
    现场地下电力电缆绝缘劣化评估方法与系统

    公开(公告)号:US20120306510A1

    公开(公告)日:2012-12-06

    申请号:US13152162

    申请日:2011-06-02

    IPC分类号: H01H31/12

    摘要: A method for assessing insulation deterioration in a live underground power cable may include, in one embodiment, attaching a coupling device to a live underground power cable and using the coupling device to couple a test signal onto the power cable. The power cable may carry a normal AC power signal at a first frequency, while the test signal may have a second frequency different from the first frequency. The test signal may be detected after it has traveled a distance along the power cable. It may then be analyzed to determine a change in velocity and/or attenuation of the test signal as a function of the normal AC power signal. The severity of water trees in the power cable may be inferred based on the magnitude of the change.

    摘要翻译: 在一个实施例中,用于评估活地下电力电缆中的绝缘劣化的方法可以包括将耦合装置附接到活地下电力电缆并且使用耦合装置将测试信号耦合到电力电缆上。 电力电缆可以以第一频率携带正常的交流电力信号,而测试信号可以具有与第一频率不同的第二频率。 在沿着电力电缆行进一段距离之后,可以检测测试信号。 然后可以对其进行分析,以确定作为正常AC功率信号的函数的测试信号的速度和/或衰减的变化。 电力电缆中水木的严重性可以根据变化的大小来推断。

    Dynamically adjusting piezoelectric current sensors
    3.
    发明授权
    Dynamically adjusting piezoelectric current sensors 有权
    动态调节压电电流传感器

    公开(公告)号:US08723397B2

    公开(公告)日:2014-05-13

    申请号:US13179332

    申请日:2011-07-08

    IPC分类号: H01L41/107

    CPC分类号: H02N2/181

    摘要: Provided are various embodiments of an adjustment circuit, having a base layer and a piezoelectric layer juxtaposed relative to the base layer and including a first electrode such that when the piezoelectric layer is stressed a polarization charge appears between the base layer and one side of the piezoelectric layer and an opposite polarization charge appears on an opposite side of the piezoelectric layer.

    摘要翻译: 提供了调整电路的各种实施例,其具有相对于基极层并置的基极层和压电层,并且包括第一电极,使得当压电层受到应力时,极化电荷出现在基底层和压电体的一侧之间 层和相反的极化电荷出现在压电层的相对侧上。

    Dynamically Adjusting Piezoelectric Current Sensors
    4.
    发明申请
    Dynamically Adjusting Piezoelectric Current Sensors 有权
    动态调整压电电流传感器

    公开(公告)号:US20120007468A1

    公开(公告)日:2012-01-12

    申请号:US13179332

    申请日:2011-07-08

    IPC分类号: H01L41/113

    CPC分类号: H02N2/181

    摘要: Provided are various embodiments of an adjustment circuit, having a base layer and a piezoelectric layer juxtaposed relative to the base layer and including a first electrode such that when the piezoelectric layer is stressed a polarization charge appears between the base layer and one side of the piezoelectric layer and an opposite polarization charge appears on an opposite side of the piezoelectric layer.

    摘要翻译: 提供了调整电路的各种实施例,其具有相对于基极层并置的基极层和压电层,并且包括第一电极,使得当压电层受到应力时,极化电荷出现在基底层和压电体的一侧之间 层和相反的极化电荷出现在压电层的相对侧上。

    MICROFABRICATED PARTICULATE MATTER MONITOR
    5.
    发明申请
    MICROFABRICATED PARTICULATE MATTER MONITOR 有权
    微晶颗粒物监测器

    公开(公告)号:US20130036793A1

    公开(公告)日:2013-02-14

    申请号:US13205313

    申请日:2011-08-08

    IPC分类号: G01N21/17

    摘要: An apparatus for measuring concentrations of airborne particulate matter may include, in one embodiment, a primary channel to receive air samples from the external environment. The air samples include particles of varying sizes. A microfluidic circuit communicates with the primary channel and small particles (having a size less than a threshold size) are diverted around a bend into a secondary channel. Remaining larger particles are unable to make the bend and continue through the primary channel. A mass-sensitive element communicating with the secondary channel includes a collection surface to collect the small particles. A resonant frequency of the mass-sensitive element is reduced in proportion to the mass of the particles collected.

    摘要翻译: 在一个实施例中,用于测量空气传播的颗粒物质的浓度的装置可以包括从外部环境接收空气样品的主要通道。 空气样品包括不同大小的颗粒。 微流体回路与主通道连通,并且小的颗粒(具有小于阈值尺寸的尺寸)被绕弯曲转向辅助通道。 剩余较大的颗粒不能弯曲并继续通过主通道。 与次级通道连通的质量敏感元件包括收集表面以收集小颗粒。 质量敏感元件的共振频率与收集的颗粒的质量成正比地减小。

    APPARATUS AND METHOD FOR DETECTING FAULTY CONCENTRIC NEUTRALS IN A LIVE POWER DISTRIBUTION CABLE
    6.
    发明申请
    APPARATUS AND METHOD FOR DETECTING FAULTY CONCENTRIC NEUTRALS IN A LIVE POWER DISTRIBUTION CABLE 审中-公开
    用于检测动力分配电缆中的不连续中性点的装置和方法

    公开(公告)号:US20120126804A1

    公开(公告)日:2012-05-24

    申请号:US13113957

    申请日:2011-05-23

    IPC分类号: G01R33/02

    CPC分类号: G01R33/072

    摘要: An apparatus for detecting a faulty concentric neutral wire in a live power distribution cable may include, in one embodiment, a housing for sliding along a surface of a power distribution cable, a magnetic sensor, and a motion device. The magnetic sensor may be coupled to the housing and configured to detect a magnetic field produced by each concentric neutral wire as the housing moves along the surface of the cable. The motion device may also be coupled to the housing, and may detect motion of the housing relative to the cable. In some embodiments, a communication device may communicate data describing the magnetic field and motion to a destination device.

    摘要翻译: 在一个实施例中,用于检测带电配电电缆中的故障同心零线的装置可以包括用于沿着配电电缆,磁传感器和运动装置的表面滑动的壳体。 磁传感器可以耦合到壳体并且被配置为当壳体沿着电缆的表面移动时,检测由每个同心的中性线产生的磁场。 运动装置还可以联接到壳体,并且可以检测壳体相对于电缆的运动。 在一些实施例中,通信设备可以将描述磁场和运动的数据传送到目的地设备。

    Microfabricated particulate matter monitor
    7.
    发明授权
    Microfabricated particulate matter monitor 有权
    微生物颗粒物监测仪

    公开(公告)号:US08806915B2

    公开(公告)日:2014-08-19

    申请号:US13205313

    申请日:2011-08-08

    IPC分类号: G01N21/00

    摘要: An apparatus for measuring concentrations of airborne particulate matter may include, in one embodiment, a primary channel to receive air samples from the external environment. The air samples include particles of varying sizes. A microfluidic circuit communicates with the primary channel and small particles (having a size less than a threshold size) are diverted around a bend into a secondary channel. Remaining larger particles are unable to make the bend and continue through the primary channel. A mass-sensitive element communicating with the secondary channel includes a collection surface to collect the small particles. A resonant frequency of the mass-sensitive element is reduced in proportion to the mass of the particles collected.

    摘要翻译: 在一个实施例中,用于测量空气传播的颗粒物质的浓度的装置可以包括从外部环境接收空气样品的主要通道。 空气样品包括不同大小的颗粒。 微流体回路与主通道连通,并且小的颗粒(具有小于阈值尺寸的尺寸)被绕弯曲转向辅助通道。 剩余较大的颗粒不能弯曲并继续通过主通道。 与次级通道连通的质量敏感元件包括收集表面以收集小颗粒。 质量敏感元件的共振频率与收集的颗粒的质量成正比地减小。