System and method for performing transformer diagnostics

    公开(公告)号:US10545183B2

    公开(公告)日:2020-01-28

    申请号:US16261309

    申请日:2019-01-29

    Inventor: Mark F. Lachman

    Abstract: A method for performing diagnostics on a target transformer includes applying a voltage output of a voltage generator to a winding or phase of the target transformer; controlling the voltage generator to output an AC voltage at a first frequency and then a second frequency and measuring first and second excitation currents flowing into the target transformer associated with the first frequency and second frequency, respectively. The method further includes determining an actual excitation current of the target transformer as a function of both the first and second excitation currents, and comparing the actual excitation current of the target transformer to excitation currents associated with one or more benchmark transformers having known electrical characteristics. And when the actual excitation current of the target transformer matches an excitation current of one of benchmark transformers, determining the electrical characteristics of the target transformer to match electrical characteristics of the one benchmark transformer.

    System and method for performing transformer diagnostics

    公开(公告)号:US10203364B2

    公开(公告)日:2019-02-12

    申请号:US15436403

    申请日:2017-02-17

    Inventor: Mark F. Lachman

    Abstract: A method for performing diagnostics on a target transformer includes applying a voltage output of a voltage generator to a winding or phase of the target transformer; controlling the voltage generator to output an AC voltage at a first frequency and then a second frequency and measuring first and second excitation currents flowing into the target transformer associated with the first frequency and second frequency, respectively. The method further includes determining an actual excitation current of the target transformer as a function of both the first and second excitation currents, and comparing the actual excitation current of the target transformer to excitation currents associated with one or more benchmark transformers having known electrical characteristics. And when the actual excitation current of the target transformer matches an excitation current of one of benchmark transformers, determining the electrical characteristics of the target transformer to match electrical characteristics of the one benchmark transformer.

    Single element three terminal piezoresistive pressure sensor
    7.
    发明授权
    Single element three terminal piezoresistive pressure sensor 有权
    单元三端压阻式压力传感器

    公开(公告)号:US08525279B2

    公开(公告)日:2013-09-03

    申请号:US12794288

    申请日:2010-06-04

    CPC classification number: G01L9/0055 G01L1/2293

    Abstract: Embodiments of the invention provide for three-terminal pressure sensors (“3-TPS”), a method of measuring a pressure with a 3-TPS, and a method of manufacturing a 3-TPS. In some embodiments, the 3-TPS includes a semiconducting layer with cavity and a 3-TPS element having at least one piezoresistive layer overlapping at least a portion of the cavity and oriented at an angle selected to provide a desired sensitivity for the 3-TPS. The method of measuring a pressure with a 3-TPS is performed with a 3-TPS that includes an input terminal, first and second output terminals, and a 3-TPS element, the 3-TPS element overlapping at least a portion of a cavity at a predetermined angle. The method comprises providing an input signal to the input terminal of the 3-TPS, determining a difference between two output signals from the respective output terminals of the 3-TPS, and correlating the determined difference to a pressure.

    Abstract translation: 本发明的实施例提供三端压力传感器(“3-TPS”),使用3-TPS测量压力的方法和制造3-TPS的方法。 在一些实施例中,3-TPS包括具有空腔的半导体层和具有至少一个压阻层的3-TPS元件,该至少一个压阻层与空腔的至少一部分重叠并且以选定的角度定向以为3-TPS提供期望的灵敏度 。 使用3-TPS测量压力的方法是使用包括输入端子,第一和第二输出端子以及3-TPS元件的3-TPS进行的,所述3-TPS元件与空腔的至少一部分重叠 以预定角度。 该方法包括向3-TPS的输入端提供输入信号,确定来自3-TPS的相应输出端的两个输出信号之间的差值,并将所确定的差与压力相关。

    Control Valve Monitoring System
    8.
    发明申请
    Control Valve Monitoring System 有权
    控制阀监控系统

    公开(公告)号:US20130019683A1

    公开(公告)日:2013-01-24

    申请号:US13552379

    申请日:2012-07-18

    Abstract: A control valve monitoring system is disclosed. The control valve monitoring system includes at least one sensor connected to one of a valve stem or valve shaft, and the at least one sensor detects a change in mechanical integrity of one of the valve stem or valve shaft. A device for providing data regarding the change in mechanical integrity of one of the valve stem or valve shaft is provided, allowing maintenance of the valve shaft or valve stem to be conducted in an efficient manner.

    Abstract translation: 公开了一种控制阀监控系统。 控制阀监测系统包括连接到阀杆或阀轴之一的至少一个传感器,并且所述至少一个传感器检测阀杆或阀轴之一的机械完整性的变化。 提供了一种用于提供关于阀杆或阀轴中的一个的机械完整性变化的数据的装置,允许以有效的方式维持阀轴或阀杆。

    System and method for computer noteboook electromagnetic compatibility analysis
    9.
    发明授权
    System and method for computer noteboook electromagnetic compatibility analysis 有权
    电脑笔记本电脑电磁兼容性分析系统及方法

    公开(公告)号:US08155639B2

    公开(公告)日:2012-04-10

    申请号:US12052521

    申请日:2008-03-20

    CPC classification number: G01R31/002

    Abstract: A system and method for antenna analysis and electromagnetic compatibility testing in a wireless device utilizes a “parent” device that undergoes rigorous conventional testing. A “child” device having similar components may thereafter undergo abbreviated testing. Because the Total Isotropic Sensitivity of the parent device is known, testing may be performed on the child device to infer equivalence to the parent's TIS performance using the abbreviated test techniques.

    Abstract translation: 无线设备中用于天线分析和电磁兼容性测试的系统和方法利用经过严格常规测试的“母”设备。 具有类似组件的“小孩”装置之后可以进行缩写测试。 由于父设备的总各向同性灵敏度是已知的,所以可以在子设备上执行测试,以使用缩写测试技术来推断与父级TIS性能的等效性。

    SENSING DEVICE
    10.
    发明申请
    SENSING DEVICE 有权
    感应装置

    公开(公告)号:US20110257928A1

    公开(公告)日:2011-10-20

    申请号:US13087894

    申请日:2011-04-15

    Abstract: A sensing device including a sensor, a triggering mechanism and a covering is provided. The covering is positioned in contact with a body such that the triggering mechanism extends from a moving segment to a reference segment and across a joint center located therebetween. Movement of the moving segment activates the triggering mechanism to provide a force input to the sensor, actuating the sensor to generate an output defining at least one measurement of the movement. The measurement may be one or more of rotation, translation, velocity, acceleration, and joint angle. An intermediate mechanism may be interposed between the triggering mechanism and the sensor. The sensing device may include a means to process or record measurements corresponding to movement of the moving segment and joint center. A system and method of measuring the movement of a moving segment is also provided.

    Abstract translation: 提供了包括传感器,触发机构和覆盖物的感测装置。 覆盖件定位成与主体接触,使得触发机构从移动段延伸到参考段并跨过位于其间的接合中心。 移动段的移动激活触发机构以向传感器提供力输入,致动传感器以产生限定运动的至少一个测量的输出。 测量可以是旋转,平移,速度,加速度和关节角度中的一个或多个。 可以在触发机构和传感器之间插入中间机构。 感测装置可以包括用于处理或记录与移动段和联合中心的移动相对应的测量的装置。 还提供了测量移动段的运动的系统和方法。

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