Abstract: A sensor for sensing a usage status of an electrical device and its associated method are disclosed. The sensor is disposed at a near-end of a power line of the electrical device. The sensor provided with a magnetic detector, an analog-to-digital converter and a controller. The magnetic detector is close to the power line to detect a magnetic field change around the power line to correspondingly generate an analog signal. The analog-to-digital converter (ADC) is used to receive the analog signal and convert the analog signal to a digital signal. The controller is used to receive the digital signal and generate an indication signal to accordingly learn at least one of statuses of being turned on and turned off the electrical device.

Abstract: A magnetic sensor circuit includes a vertical-magnetic-field sensor, a horizontal-magnetic-field sensor, a control circuit controlling a first measurement mode and a second measurement mode through switching, a first feedback circuit configuring a feedback loop of a first operational amplifier, a second feedback circuit configuring a feedback loop of a second operational amplifier, a connecting circuit, and at least any one of a first switch switching an impedance of the first feedback circuit, a second switch switching an impedance of the second feedback circuit, and a third switch switching an impedance of the connecting circuit those which controlled by the control circuit. The magnetic sensor circuit detects magnetic fields in nearly the same two-axial sensitivity without using a magnetic converging plate while reducing an occupation area of the amplifier circuit.

Abstract: Disclosed is a panel testing device. The panel testing device includes: a supporter and a plurality of test pins disposed on the supporter, wherein the plurality of test pins are in one-to-one correspondence with a plurality of signal pins on the tested panel, any one of the test pins satisfies d?D?d+L; wherein D is a width of the test pin, d is a width of the signal pin corresponding to the test pin, L is a minimum pitch between two adjacent signal pins.

Abstract: A clamp meter includes a meter body and a clamp jaw assembly mounted to the meter body. The clamp jaw assembly includes a first clamp jaw and a second clamp jaw that are movable in relation to each other between a closed position and an open position. In the closed position, distal ends of the first and second clamp jaws meet to define an enclosed area between the first and second clamp jaws, and in the open position, the distal ends of the first and second clamp jaws separate from each other to define a gap allowing a wire under test to pass therethrough. The clamp meter further includes a locking slider positioned within a slot inside the meter body. A switch assembly moves the locking slider longitudinally within the slot between locked and unlocked positions. In the locked position, the locking slider blocks the first clamp jaw from movement.

Abstract: In a measuring arrangement (1) for contactless electric current measurement, it is provided to detect a common signal of a measuring coil arrangement (2) and a compensating coil arrangement (3) by a first detection device (4) and to detect a signal from at least one measuring coil (6, 7) of the measuring coil arrangement (2) separately therefrom by a second detection device (5, 23).

Abstract: The present disclosure relates to systems and methods of locking a faulted circuit indicator (FCI). For example, the FCI may include a locking assembly. The locking assembly may include a lock plate that selectively moves between a locked position and an unlocked position. When in the locked position, the lock plate blocks a lock link of the FCI from moving in a first direction to prevent the FCI from opening. When in an unlocked position, the lock plate enables the lock link of the FCI to move in the first direction to allow the FCI to open.

Abstract: A current sensor provided with an electrical coil (5) made in the form of a printed circuit. Its closed contour is inscribed within a rectangle delimiting a through window (9) for passing a primary conductor (2). It comprises four rectilinear segments (TR) connected two by two by a circular sector (SC), delimited by an interior arc (10) and an exterior arc (11). It comprises, in its circular sectors (SC), additional turns (13), which extend from exterior arc (11) towards an intermediate arc (14) located between interior arc (10) and exterior arc (11). They are inserted between the main turns (12) in such a way that the spacing between two consecutive turns (12, 13) on the exterior arc (11) is equal to spacing (P) of the main turns (12) in rectilinear segments (TR) and that the average turns density is almost constant in electrical coil (5).

Abstract: A method for implementing controller area network (CAN) communications between a plurality of CAN nodes using a single radio frequency (RF) coax cable is provided. In an aspect, a hardware interface (e.g., an electronic circuit) may be coupled to each of the plurality of CAN nodes. The hardware interface may receive a CAN signal from a first CAN node. The hardware interface may convert the CAN signal to a single RF signal and transmit the RF signal to a second CAN node over the single RF coax cable. Moreover, the hardware interface may transmit a CAN feedback signal received over the RF coax cable to the first CAN node. In an aspect, the hardware interface may include an amplitude modulation (AM) modulator, an AM detector, and a bandpass filter.

Abstract: A coil that includes a current and a voltage sensor.

Abstract: Temperature monitoring devices have a primary body with an inner circular perimeter, a temperature monitoring segment held by the primary body, the temperature monitoring segment comprising an inwardly extending thermal probe, and a fastener assembly segment held by the primary body at a location that is circumferentially spaced apart from the temperature monitoring segment. The fastener assembly segment has a circumferentially extending bracket that can be radially extended in a direction that is toward the inner circular perimeter of the device.

Abstract: A Rogowski coil in a sensor unit has voltage induced by a conductor surrounded by the Rogowski coil. The voltage is integrated to represent current which is converted to digital data representing current in the conductor and sent wirelessly to a multimeter. The sensor unit may receive control signals from the multimeter and a remote control apparatus. A plurality of sensor units may be networked and controlled by the remote control apparatus.

Abstract: The monitoring device for an electrical line conductor and including a protective housing, an attachment mechanism, an electronic monitoring circuit and a voltage measurement sensor including a measurement electrode. The monitoring device also includes a protection device surrounding the voltage measurement electrode and extending outside the housing to prevent rainwater from completely covering the voltage measurement electrode and/or the housing containing said electrode. The protection device includes an electrical shielding for stabilizing, around the voltage measurement electrode, the electric field variations due to external conditions. The electrical installation includes at least one line conductor and at least one monitoring device communicating with a communication device.

Abstract: A sensor includes a non-magnetic core having a first winding wrapped thereon. The first winding has a center tap dividing the first winding into a first winding portion and a second winding portion. The center tap is coupled to a reference voltage. The first winding portion and the second winding portion are configured to sense first AC signals, and have a balanced susceptibility to second AC signals. The differential integrating circuit is configured to provide common mode rejection of the second AC signals. The differential integrator circuit is operably coupled to the first winding portion and the second winding portion.

Abstract: A current sensor of Rogowski type including two layers of coils surrounding a current conductor, each layer of coils including a plurality of windings wound on a plurality of axes forming the contour of polygons of identical forms, arranged on parallel planes, and placed facing one another such that each corner zone of the first polygon is situated facing a corresponding corner zone of the second polygon and such that, in each corner zone, turns of the winding of the first layer of coils have different orientations from those of the turns of the winding of the second layer of coils in the facing corner zone.

Abstract: Unique systems, methods, techniques and apparatuses of onboard battery charger systems are disclosed. One exemplary embodiment is a battery charging system comprising an isolation device and an electric vehicle charger. The isolation device includes an AC input terminal; an AC output terminal; two DC output terminals; a first portion of a detection circuit including a first sensor and a first resistor coupled in series; and a first controller. The charger includes an AC input terminal; two DC input terminals; and a second portion of the detection circuit including a second sensor and a second resistor coupled in series. The first controller is structured to isolate the AC input terminal of the isolation device from the AC output terminal of the isolation device when the two DC input terminals of the electric vehicle charger are not coupled to the two DC output terminals of the isolation device.

Abstract: A current sensing circuit for use with a Rogowski coil arranged around a conductor having a primary current includes input terminals structured to receive an output voltage of the Rogowski coil, an analog to digital converter structured to convert a differential voltage to a digital differential voltage signal, a digital integrator structured to receive the digital differential voltage signal, to implement a discrete-time transfer function that is a transform of a transfer function of an analog integrator, and to output a digital integrator output signal, and a direct current blocker filter structured to remove a direct current bias from the digital integrator output signal and to output a digital current output signal that is proportional to the primary current in the conductor.

Abstract: The disclosed system may include (1) a plurality of monitoring devices, where each of the plurality of monitoring devices is located at a different location along a powerline conductor and may include (a) at least one detection component that detects at least one physical characteristic at the location of the monitoring device along the powerline conductor, and (b) a transmitter that wirelessly transmits data indicating the at least one physical characteristic, and (2) a data injection device that (a) wirelessly receives the data indicating the at least one physical characteristic detected by the plurality of monitoring devices at the different locations along the powerline conductor, (b) transforms the data into an optical signal, and (c) injects the optical signal onto a fiber optic cable for transmission to a data collection subsystem. Various other systems and methods are also disclosed.

Abstract: A method of using a temporary conductor as a re-usable tool in maintaining, repairing or re-conductoring at least one energized phase, includes stringing the temporary conductor between support structures at either end of a first section, then energizing the said temporary conductor by bringing the temporary conductor to the voltage potential of the phase and electrically paralleling the temporary conductor with the energized phase, de-energizing and then maintaining, repairing or reconductoring the de-energized energized phase, re-energizing and electrically paralleling said energized phase, de-energizing and removing the temporary conductor for later re-use as the re-usable tool in a second section of the energized phase.

Abstract: The Rogowski coil type sensor for measuring current includes a carrier and at least one secondary winding. The winding includes: at least one internal layer with a high turn density, which layer is wound in an “outward” first winding direction from the first end to a second opposite end of the winding, and at least one external layer with a low turn density, which layer is wound in a “return” second winding direction. The external layer with a low turn density includes: a first compensating portion with a high turn density, which portion is of small length and close to the first end, a central portion with a low turn density, which portion is of large length, and a second compensating portion with a high turn density, which portion is of small length and close to the second end.

Abstract: A variable frequency drive (VFD) circuit includes an input connectable to an AC source, a rectifier to convert an AC power input to a DC power, a DC link to receive DC power from the rectifier and having a DC link voltage thereon, a DC link capacitor bank with one or more capacitors connected to the DC link, and a pre-charge circuit coupled to the DC link capacitor. The pre-charge circuit further includes one or more resistors, one or more pre-charge relays each operable in on and off states to selectively control a current flow through the resistor(s) so as to control an initial pre-charge of the DC link capacitor, and an overvoltage relay operable in on and off states to selectively cut-off a current flow to the DC link capacitor bank, so as to prevent an overvoltage condition in the DC link capacitor bank.

Abstract: Systems and methods provide measurement of alternating current (AC) electrical parameters in an insulated wire without requiring a galvanic connection between the insulated wire and a test probe. Measurement systems or instruments may include a housing that includes both a non-contact voltage sensor and a non-contact current sensor. The measurement system obtains measurements from the voltage sensor and the current sensor during a measurement time interval and processes the measurements to determine AC electrical parameters of the insulated wire. The AC electrical parameters may be presented to an operator via a visual indicator device (e.g., display, lights). The AC electrical parameters may additionally or alternatively be communicated to an external device via a wired and/or wireless communications interface.

Abstract: A method for monitoring a high-voltage electric-current transmission line includes: determining (100) the ampacity (A) of the high-voltage line from a distribution temperature, conduction parameters and meteorological parameters; measuring (202) the current strength effectively transmitted by the high-voltage line using at least one sensor; and monitoring (204), by a monitoring device connected to the sensor, an excess of ampacity (A) by the current strength measured. The determining (100) of the ampacity (A) includes: selecting (108, 110, 112, 114, 116) a value of this ampacity (A) by optimizing a probability of exceeding the distribution temperature, with this probability defined based on a joint probability model (P) of operating current strength and temperature that depends on meteorological parameters; and recording (118) the selected ampacity value in a storage unit of the monitoring device.

Abstract: An object of the present invention is to provide a wireless communication technique which can measure a physical state of the measurement object with high accuracy and can transmit the measurement result rapidly. The communication device according to the present invention wirelessly transmits the measurement result during a first time slot, and starts measurement during a second time slot which differs from the first time slot (see FIG. 3).

Abstract: The present disclosure relates to systems and methods of locking a faulted circuit indicator (FCI). For example, the FCI may include a locking assembly. The locking assembly may include a lock plate that selectively moves between a locked position and an unlocked position. When in the locked position, the lock plate blocks a lock link of the FCI from moving in a first direction to prevent the FCI from opening. When in an unlocked position, the lock plate enables the lock link of the FCI to move in the first direction to allow the FCI to open.

Abstract: In a voltage detection device for a transforming apparatus, a voltage divider is constituted by providing an intermediate electrode between a central conductor and a tank of the transforming apparatus, to detect a voltage E1 of the central conductor based on a voltage E2 of the voltage divider. The voltage detection device for a transforming apparatus includes an incomplete integration circuit having a reverse characteristic to an input/output voltage amplitude ratio-frequency characteristic of a high-pass filter formed by a floating electrostatic capacitance between the central conductor and the intermediate electrode, an earth electrostatic capacitance between the intermediate electrode and the tank, and a voltage dividing resistor connected in parallel to the earth electrostatic capacitance, and a signal processing circuit that outputs a value based on an output voltage E3 of the incomplete integration circuit as the voltage E1 of the central conductor.

Abstract: A display device includes a display panel and a backlight module. The display panel is disposed opposite to the backlight module. The backlight module includes a metal substrate, a light emitting element, a circuit layer, an adhesive layer, a reflective element and a light guiding element. The light emitting element is disposed at one side of the circuit layer facing the light guiding element. The adhesive layer is disposed between the circuit layer and a surface of the metal substrate. The reflective element is disposed adjacent to the circuit layer and the adhesive layer and is located on the surface of the metal substrate. The reflective element is disposed between the metal substrate and the light guiding element. A bottom surface of the adhesive layer and at least a part of a bottom surface of the reflective element are located at a same plane.

Abstract: Under one aspect, a method for characterizing current of an operating device under test (DUT) includes injecting a signal into a superconducting sensor; determining a property of the superconducting sensor based on the injected signal; disposing the superconducting sensor in spaced relationship to the operating DUT; inducing a magnetic field in the superconducting sensor based on the spaced relationship, the current of the operating DUT, and the injected signal; determining a change in the property of the superconducting sensor resulting from the induced magnetic field; and estimating current of the operating DUT based on the change in the property of the superconducting sensor.

Abstract: A method for detecting electrical arcs for electrical installations with DC current source, implemented by a detection device including a calculation processor, disposed between the DC current source and a load. A digitized temporal signal is obtained on the basis of the electric current provided by the DC current source. A digitized temporal sub-signal is extracted. A bandpass filtering is applied to the digitized temporal sub-signal. The method also includes calculating a statistical value of order four of the filtered digitized temporal sub-signal, and comparing the calculated statistical value of order four with a first statistical threshold.

Abstract: Electrical current transducer for mounting around an electrical primary conductor carrying a current to be measured, comprising a primary conductor receiving aperture (16), a housing (4), a magnetic core (6) mounted in the housing, and a secondary coil (10) wound around a branch of the magnetic core. The housing comprises a major portion (4a) and a minor portion (4b), the major portion being separable from the minor portion and configured to be mounted and locked around the primary conductor, the housing major and minor portions joinable together at joining faces (32a, 36a). The magnetic core comprises a major portion (6a) mountable in a core receiving cavity (20) of the housing major portion (4a), and a minor portion (6b) mountable in a core receiving cavity (22) of the housing minor portion (4b).

Abstract: An electrosurgical generator includes a radio frequency output stage, a sensor for sensing current, and an active lead. The radio frequency output stage is configured to output at least one radio frequency waveform. The sensor includes a current sensor coil including an outer coil including an opening therethrough and an inner coil coupled to and disposed within the outer coil. The active lead is coupled to the radio frequency output stage and passes through the current sensor coil opening. The current sensor coil is configured to output a first signal indicative of a current within the active lead.

Abstract: An electrosurgical generator includes a radio frequency output stage, a sensor for sensing current, and an active lead. The radio frequency output stage is configured to output at least one radio frequency waveform. The sensor includes a current sensor coil including an outer coil including an opening therethrough and an inner coil coupled to and disposed within the outer coil. The active lead is coupled to the radio frequency output stage and passes through the current sensor coil opening. The current sensor coil is configured to output a first signal indicative of a current within the active lead.

Abstract: A sensor for sensing current includes a current sensor coil and at least one active lead and at least one return lead. The current sensor coil includes an outer coil and an inner coil coupled to and disposed within the outer coil. The at least one active lead and the at least one return lead pass through the current sensor coil opening. The current sensor coil is configured to output a differential signal indicative of a current within the at least one active lead and the at least one return lead.

Abstract: A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

Abstract: A coil that includes one or more sensors.

Abstract: The present disclosure provides surge arrester units having one or a plurality of sensor assemblies within the surge arrester unit. The sensor assemblies include a first plate, a second plate, a heat absorption member positioned between the first and second plates, and a temperature assembly that senses the temperature of the heat absorption member and transmits the temperature.

Abstract: A holding device includes a Rogowski coil, where the Rogowski coil includes a line portion wound into a coil. The holding device further includes a housing part into which the Rogowski coil is connected. A fastening part is configured to be releasebly connected to the housing part and is further configured to be attached to a current-conducting means formed for conducting a current.

Abstract: A measuring device includes an integrated sensor unit. The integrated sensor unit is configured to record at least one moisture characteristic value of at least one building material. The measuring device further includes a communication unit. The communication unit is configured to receive at least one signal from at least one external sensor unit.

Abstract: Optical fiber based current measuring equipment for measuring the current circulating through a conductor. The equipment includes an interrogator having a light emitter and a light receiver, and a sensing portion close to the conductor, the interrogator and the sensing portion being connected through at least one standard single-mode intermediate fiber. The light emitter of the interrogator is configured to emit sets of at least two polarized light pulses to the sensing portion, the pulses being polarized with a specific degree difference, and the light receiver (4) is configured to determine the current circulating through the conductor depending on the pulses it receives in return from the sensing portion. A method for measuring the current circulating through a conductor with the use of an optical fiber based current measuring equipment is also provided.

Abstract: An example embodiment includes an idle state detection circuit. The idle state detection circuit includes a bias current loop, a rectifying circuit loop, a voltage translating loop, and a filter circuit. The bias current loop provides a rectifying diode a forward current such that the rectifying diode detects an alternating current (AC) signal received from a transmitter via one or more transmission nodes. The rectifying circuit loop stores differential peak to peak amplitude information representative of a peak to peak amplitude of the AC signal in a first capacitor that is electrically coupled to a cathode side of the rectifying diode. The voltage translating loop converts the differential peak to peak amplitude information stored at the first capacitor to a single-end voltage signal across a first resistor that is electrically coupled to the cathode side of the rectifying diode. The filter circuit filters an AC component of the single-end voltage signal.

Abstract: A frequency diverse phased-array antenna operates simultaneously in two bands. A checkerboard of antenna elements for a first wavelength is offset with a second checkerboard of second antenna elements. Within the substrate is a three dimensional checkerboard of ground planes and ground walls which provide signal isolation between the bands. Multiple ground planes optimize operation at the several frequencies. Phased-array elements are isolated by a conductive wall in a multi-layer substrate. Orthogonal polarization of antenna patches further improve signal discrimination. Below the surface layer, another conductive wall isolates each quadrature hybrid. The conductive wall can be realized by metal vias or metal mesh infused through a dielectric and surrounding a raised ground plane to isolate electrical fields at each frequency. A conductive wall also provides quadrature hybrid isolation.

Abstract: A multifunction testing and measuring device having a probe body with an elongated portion extending outward from a rearward main body portion to a hook-shaped forward end, the hook-shaped end useful for isolating a conductor under test, a slide closure member adapted to slide longitudinally forward from a rearward open position to a forward closed position, the closed position useful to capture the conductor under test within a space encircled by the combination of the hook-shaped end, the closed slide closure member, and the rearward main body, with the space encircled including a current sensing zone, and having test leads integral to and stowable on the main body. The multi tester comprises circuitry adapted for detecting a magnetic flux generated by an electric current passing through the conductor under test positioned within the current sensing zone, for sensing current and inrush current, as well as selectably measuring voltage, continuity, and resistance between the test leads.

Abstract: The present invention provides a high-sensitivity, carrier-resolved photo-Hall and photoelectromagnet (PEM) system utilizing multiple parallel dipole line (PDL) magnet systems. In one aspect of the invention, a Hall measurement apparatus is provided. The Hall measurement apparatus includes: a measurement chamber (e.g., a cryostat); a Hall module having at least one freely-rotating cylindrical magnet within the measurement chamber; a motor-driven cylindrical magnet adjacent to the at least one freely-rotating cylindrical magnet; an optical module for photo-Hall measurement, a set of electronics instruments and a data and signal analysis program for n-th harmonics lock-in detection of magnetoresistance signal and a control program. The system yields majority carrier type, density and mobility and, with illumination, minority carrier mobility and density.

Abstract: An article is provided with a web of polymer fibers forming a scrim with openings between the polymer fiber elements. A particulate is distributed in, or on the polymer fiber in a quantity to make the scrim detectable by X-ray detection or magnetic detection. One or more layers are laminated to the scrim. A process for detecting a multi-layered laminated scrim-containing article with magnetic or X-ray detection equipment in a production setting is also provided. With process implementation article loss in a product can be detected thereby reducing precautionary product discard.

Abstract: The invention relates to an automation module for building automation, which is designed to be installed in a wall of a house as an at least partially concealed installation. The automation module comprises a high voltage region (6) and a low voltage region (4). It additionally comprises an insulation region (5) for separating said high (6) and low (4) voltage regions, a first circuit board (41, 41?) having at least one input interface (411, 414), a second circuit board (42) having at least one control unit (422), and a third circuit board (61) having at least one switching element (611). Said first, second and third circuit boards (41, 41?; 42, 61) and the insulation region (5) are arranged one above the other in layers.

Abstract: A current meter having a movably mounted swivel element, in which an angle is subtended between a first leg and a second leg of the swivel element. A free end of the first leg is coupled to the handle and a free end of the second leg is coupled to the first receiving element, these being movable relative to each other, so that upon activating the handle an activating force engaging with the first leg can be generated. The activating force can be converted by the swivel element into a displacement force on the second leg, directed transversely to the activating force, so that by this displacement force the first receiving element can be moved.

Abstract: A method of treating and preventing a neurological disorder, such as Alzheimer's disease, in a subject in need thereof by positioning an electromagnetic field emitting source proximal to the subject and exposing the subject to an electromagnetic field having a predetermined frequency (preferably ?300-3,000 MHz) for a predetermined absorption period (preferably greater than ?3 days). Each individual treatment (comprising exposure to the predetermined frequency for the predetermined absorption period) is continued at a predetermined schedule for a predetermined treatment period. The EMF can have a specific absorption rate up to about 8 W/kg. The methodology enhances cognition in the subject and/or treats/prevents the underlying neurological disorder or a symptom thereof.

Abstract: Superconducting devices with enforced directionality and related methods are provided. In one example, a device including a first Josephson junction transmission line (JTL) for propagating a first set of quantum signals in a first direction and a second JTL for propagating a second set of quantum signals in the first direction is provided. The device may include a logic gate having a first input terminal for receiving the first set of quantum signals via the first JTL, and a second input terminal. The device may include a unidirectional buffer having a first input terminal for receiving the second set of quantum signals via the second JTL and an output terminal for coupling the second set of quantum signals to the second input terminal of the logic gate, where the unidirectional buffer may be configured to propagate quantum signals in only the first direction.

Abstract: Disclosed are systems and methods for marine geophysical surveying. An example system an electromagnetic source configured to emit an energy field into a body of water; a marine data acquisition node comprising: a base having a buoyancy such that the base is configured to float in a body of water; a geophysical sensor coupled to the base; a weight configured to anchor the marine data acquisition node to a water bottom; and a line connected between the weight and the base configured to prevent the base from floating to a surface of the body of water.

Abstract: A body coil support structure includes an elongate support member. The elongate support member defines an opening and an examination axis passing through the opening along a length of the elongate support member. The opening is configured to accept an object to be imaged. The elongate support member has a target shape for use during operation of the MRI system, with the elongate support member configured to be subjected to an operational load during operation. In a design state, the elongate support member defines a design shape, with the elongate support member not subjected to the operational load in the design state. In an installed state after installation in the MRI system, the elongate support member defines an operational shape. The elongate support member is subjected to the operational load in the installed state. The operational shape is closer to the target shape than is the design shape.

Abstract: This clamp-type ammeter has a flexible substrate of which an inner wall is configured to be able to deform into a substantially cylindrical shape. The clamp-type ammeter has a plurality of magnetic sensor elements disposed at the inner wall of the flexible substrate. The clamp-type ammeter has a tube of which one end is connected to the flexible substrate. The clamp-type ammeter has an operation unit that is connected to the other end of the tube and that can operate the deformation of the flexible substrate.