A method and a system for terahertz detection, using at least a first and a second electrodes separated by a centro-symmetric material. The system comprises at least a first and a second electrodes with conductive pads for connection to a voltage source, separated by a centro-symmetric material; the method comprising second harmonic generation in the centro-symmetric material by overlapping of a probe and a terahertz beams.

A method and a system for terahertz detection, using at least a first and a second electrodes separated by a centro-symmetric material. The system comprises at least a first and a second electrodes with conductive pads for connection to a voltage source, separated by a centro-symmetric material; the method comprising second harmonic generation in the centro-symmetric material by overlapping of a probe and a terahertz beams.

The invention relates to method of detecting an arrangement having a primary unit of an inductive power transfer system and/or a secondary unit of the inductive power transfer system. The method including: using a detector device to detect the arrangement, the detector device having at least one electrical conductor, determining at least one electrical property of the detector device and generating determination results consisting of a determination result for each of different regions of the arrangement, and comparing the determination results with existing information about the arrangement to be detected. The existing information includes information about expected values for the different regions of the arrangement, thereby generating a comparison result, and deciding from the comparison result whether the determination results indicate that the detector device has detected the arrangement as expected.

A system and method to detect the fundamental frequency of an electric input signal using a feedback control loop including a phase error detector, a loop controller, and a digitally controlled oscillator. The frequency detector may detect the fundamental frequency of an electric input signal and produce an output signal representing the fundamental frequency of the electric input signal. The frequency detector may further include a filter that may be coupled to the frequency detector output signal in order to remove spurious tones or noise from the output signal.

Methods and systems may provide for receiving a set of voltage samples corresponding to a line voltage of a leg in an electrical system and conducting a time domain analysis to identify one or more loads in the electrical system. Additionally, the time domain analysis may be used to identify one or more loads in the electrical system. In one example, conducting the time domain analysis involves classifying events with respect to cross correlation, shape magnitude, transient amplitude, transient duration, run delta and/or standard deviation.

The invention relates to a method and to a switching device (4) and a measurement system (1). In the method according to the invention for determining time differences between measurement signals measured by at least two couple measurement devices (2, 3), a time basis signal is first generated for the measurement devices (2, 3). A common reference signal is further generated by a signal generator (5). The common reference signal is fed to measurement signal inputs (8, 9) of the coupled measuring devices (2, 3) via the switching device (4). A measurement signal is then fed to said measurement signal inputs (8, 9) of the coupled measuring devices (2, 3) and the time position of the measurement signals relative to the reference signal is determined in each of the coupled measuring devices (2, 3). The switching device (4), to this end, has a first measuring device connection (12) and a second measuring device connection (13) connected to the measurement signal inputs (8, 9) of the first measuring device (2) and the second measuring device (3). A reference signal is alternately fed via the measuring device connections (12, 13) of the switching device (4) to the first or the second measuring device (2, 3) by connecting the first measuring device connection (12) to the reference signal input (22) or a first measuring connection (14), or by connecting the second measuring device connection (13) to the reference signal input (22) or the second measuring connection (15).

A method for acquiring at least one signal transmitted via an electric conductor, wherein an electric and/or magnetic field of the conductor is acquired at at least two identical or different positions relative to a longitudinal coordinate of the conductor, thus obtaining two measurement signals corresponding to the respective positions, and the signal transmitted via the conductor is inferred from the measurement signals.

A method for acquiring at least one signal transmitted via an electric conductor, wherein an electric and/or magnetic field of the conductor is acquired at at least two identical or different positions relative to a longitudinal coordinate of the conductor, thus obtaining two measurement signals corresponding to the respective positions, and the signal transmitted via the conductor is inferred from the measurement signals.

Provided is a method of accurately detecting the location of a partial discharge in a power device. For this purpose, the present invention measures sequential positions of arrival of partial discharge signals and the differences in the time of arrival between the partial discharge signals with respect to a plurality of partial discharge sensors installed on the outside surface of a power device, divides the power device into a plurality of spatial sections, determines a spatial section where the location of a partial discharge is present using the sequential positions of arrival of the partial discharge signals, calculates the representative location value of the determined spatial section, and determines compensation values for the differences in the time of arrival to be applied with respect to the respective spatial sections.

A signal source specifying apparatus receives measurement results from a plurality of sensors that receive, from a plurality of signal sources, signals represented by vectors each having a predetermined direction and measure triaxial components orthogonal to each other to specify positions of the signal sources and the vectors. The signal source specifying apparatus includes a relational matrix recording section, and a position/vector deriving section. The relational matrix recording section records a relational matrix representing a relationship between the measurement results summarized per axis by a number of the sensors and the vectors. The position/vector deriving section derives the positions of the signal sources and the vectors that offer a minimum cost function based on the measurement results and the relational matrix. The positions of the signal sources and the vectors are specified based on a result of derivation by the position/vector deriving section.