公开(公告)号：US06828770B1

公开(公告)日：2004-12-07

申请号：US09958848

申请日：2001-10-11

Applicant: Simon Francis McCauley ,  David Keith Sweeting

Inventor： Simon Francis McCauley ,  David Keith Sweeting

IPC: G01R3128

CPC classification number: G01R15/142 ,  G01R19/2506

Abstract: A method for measuring at least one characteristic parameter of an alternating current in a conductor, the method including the steps of measuring the magnetic field around the conductor at a point along the conductor; deriving an analogue voltage signal representative of the measured magnetic field; amplifying the analogue voltage signal; converting the amplified voltage signal into a digital voltage signal; measuring the digital voltage signal and, when the amplitude of digital voltage signal reaches a predetermined value, adjusting a gain setting of the amplification; and generating an output signal representative of the parameter of the alternating current based on the amplified voltage signal and the gain setting.

Abstract translation: 一种用于测量导体中的交流电的至少一个特征参数的方法，所述方法包括以下步骤：测量沿着导体的点处的导体周围的磁场; 导出代表所测量的磁场的模拟电压信号; 放大模拟电压信号; 将放大的电压信号转换成数字电压信号; 测量数字电压信号，并且当数字电压信号的幅度达到预定值时，调整放大的增益设置; 以及基于放大的电压信号和增益设置产生表示交流电的参数的输出信号。

公开(公告)号：US06771078B1

公开(公告)日：2004-08-03

申请号：US09958631

申请日：2002-01-18

Applicant: Simon Francis McCauley ,  David Keith Sweeting

Inventor： Simon Francis McCauley ,  David Keith Sweeting

IPC: H01H3102

CPC classification number: G01R31/021 ,  G01R15/20 ,  G01R31/083

Abstract: A method of detecting for a fault on one of a plurality of adjacent, alternating current carrying conductors; the method comprising the steps of detecting the waveform of a first component of a magnetic field vector representative of the magnetic field around the plurality of conductors at a location along the conductors; detecting the waveform of a second component of the magnetic field vector; monitoring, at the location, the two waveforms for any change in the waveforms; and detecting for a fault on one of the plurality of the conductors as indicated by a change in either one or both of the waveforms.

Abstract translation: 一种在多个相邻的交流导体中的一个上检测故障的方法; 该方法包括以下步骤：在沿着导体的位置检测表示多个导体周围的磁场的磁场矢量的第一分量的波形; 检测所述磁场矢量的第二分量的波形; 在位置监视波形中任意变化的两个波形; 以及如由所述波形中的一个或两者的变化所指示的，检测所述多个导体之一上的故障。

公开(公告)号：US07272520B2

公开(公告)日：2007-09-18

申请号：US10845892

申请日：2004-05-14

Applicant: David Keith Sweeting

Inventor： David Keith Sweeting

IPC: G01R33/00

CPC classification number: G01R19/2513 ,  G01R15/18 ,  G01R19/0092

Abstract: The present invention provides a method of determining a current in a conductor. The method comprises the steps of determining the nth spatial derivative of at least one vector component of the magnetic field associated with the current at at least one position and calculating the current from the nth spatial derivative. The present invention also provides an apparatus for determining a current in a conductor. The apparatus comprises a means for determining at least one vector component of the magnetic field associated with the current at at least two different positions and a means for determining the nth spatial derivative of at least one vector component of the magnetic field from the or each vector component of the magnetic field measured at the at least two positions. The apparatus also comprises a means for calculating the current from the nth spatial derivative.

Abstract translation: 本发明提供一种确定导体中的电流的方法。 该方法包括以下步骤：确定与至少一个位置处的电流相关联的磁场的至少一个矢量分量的第n个空间导数，并从第n个 / SUP>空间导数。 本发明还提供一种用于确定导体中的电流的装置。 该装置包括用于确定与至少两个不同位置处的电流相关联的磁场的至少一个矢量分量的装置，以及用于确定至少一个矢量分量的第n个空间导数的装置 在至少两个位置处测量的来自磁场的或每个矢量分量的磁场。 该装置还包括用于从第n个空间导数计算电流的装置。