Abstract: The invention enables an optical voltage sensor, comprising a piezoelectric actuator mechanically coupled to an optical strain sensor (such as a fibre Bragg grating), to withstand lightning impulses, the effects of which would otherwise be harmful or destructive to the piezoelectric actuator and/or other sensitive components. As such, the optical voltage sensor, comprised within a photonic voltage transducer which also comprises a lightning impulse attenuator, is able to comply with relevant standards and be used for applications in power networks and exposed to the highest voltages for equipment.

Abstract: A magnetic sensor device includes a first detection circuit, a second detection circuit, and a processor. The processor is configured to execute first generation processing for generating a first initial detection value, second generation processing for generating a second initial detection value, first correction processing, second correction processing, and determination processing. The first correction processing is processing for correcting the first initial detection value and updating the first initial detection value. The second correction processing is processing for correcting the second initial detection value and updating the second initial detection value. The processor executes the determination processing after alternately executing the first correction processing and the second correction processing.

Abstract: A near-field testing apparatus for testing a device under test having an array of transmitter antennas is provided. The near-field testing apparatus includes a frame structure and a receiver circuit. The frame structure defines an array of grid sections, and is arranged for receiving the array of transmitter antennas at a first side of the array of grid sections. A periphery of each grid section at the first side surrounds a plurality of transmitter antennas in the array of transmitter antennas. The grid section is arranged to guide respective electromagnetic signals emitted by the transmitter antennas from the first side to a second side of the array of grid sections. The receiver circuit, disposed at the second side of the array of grid sections, is arranged to couple the electromagnetic signals out of the grid section.

Abstract: The present disclosure discloses a single-phase fault arc detector. A fault arc signal processing circuit performs processing to obtain a voltage square wave signal, a voltage sine wave signal, a current sine wave signal, a current square wave signal, a current square shoulder pulse signal, and a current high-frequency pulse signal, and a processor accurately determines, on the basis of the plurality of obtained current signals and voltage signals and in combination with a preset operation rule, whether there is a single-phase fault arc in a power utilization line. Correlated characteristics of square shoulder parts may be accurately recognized by accurately extracting the current square shoulder pulse signal from current sampling signals; then, characteristics such as the number and durations of the square shoulder parts as well as current values may be comprehensively recognized on the basis of the current square shoulder pulse signal and the current high-frequency pulse signal.

Abstract: A measurement device includes an electric field generator, an electric field detector, a thickness gauge, and a processor. The electric field generator generates an alternating current electric field. The electric field detector detects the alternating current electric field generated by the electric field generator. The thickness gauge measures a thickness of a measurement target in a non-contact manner. The processor derives a calibration curve representing a relationship between a specific dielectric constant and an intensity of an alternating current electric field. The measurement target is insertable between the electric field generator and the electric field detector. The electric field detector detects an intensity of the alternating current electric field attenuated by the measurement target.

Abstract: A semiconductor device includes: a semiconductor element having an element main surface and first and second electrodes arranged on the element main surface; a first lead mounting the semiconductor element thereon; a second lead electrically connected to the first electrode; a third lead electrically connected to the second electrode; first connecting portions bonded to the first electrode and the second lead; and a sealing resin covering the semiconductor element, wherein the sealing resin includes a resin main surface facing the same side as the element main surface and a resin side surface connected to the resin main surface, the second lead includes a portion exposed from the sealing resin, the third lead includes a portion exposed from the sealing resin, and the exposed portion of the second lead includes a portion located on a side of the resin main surface with respect to the exposed portion of the third lead.

Abstract: Apparatus and methods for detecting flaws in objects comprised of ferromagnetic materials are disclosed. A wireless energizing unit is disclosed that includes an array of permanent magnets is used to induce a magnetic field into the objects and transducers are configured to detect a magnetic flux property in the presence of a flaw in the object. Embodiments that are configured to be clamped over the object are also disclosed. In addition, methods for retrofitting EMI detection systems with a wireless energizing unit are disclosed.

Abstract: Bearing impedance in a rotary electric machine may be estimated by isolating bearings from a frame with a dielectric pad, determining a pad capacitance, supporting the rotor by an inner race of the bearing, operating the rotary electric machine, measuring bearing inner race and outer race voltages, measuring current bypassing the dielectric pad, and estimating bearing capacitance and resistance based upon the pad capacitance, the measured and the measured current.

Abstract: A method is provided for generating a multi-carrier reflectometry signal intended to be injected into a transmission line in order to identify a presence of at least one possible fault on the transmission line. The method includes: generating, in the frequency domain, a phase-modulated multi-carrier digital signal by: generating a digital signal, phase-modulating the digital signal based on a constellation of symbols, rounding the obtained phase to the phase of the symbol of the constellation that is closest, and converting the generated signal into the time domain.

Abstract: Disclosed is a multi-dimensional analysis method for a tripping risk of a whole transmission line due to a lightning shielding failure. A quantity of thunderstorm days, a tower size, a terrain proportion, an altitude, and insulation configuration data are collected for a transmission line for which a tripping risk due to a lightning shielding failure needs to be analyzed, and a striking distance, an exposure distance, a lightning resisting level of the line after altitude factor correction, and a lightning shielding failure risk of a single-base tower are calculated in turn. Characteristics of a lightning shielding failure under different nominal heights, quantities of thunderstorm days, and terrains are studied. Representative combination conditions are selected to calculate a tripping risk of a typical tower due to the lightning shielding failure. A weight coefficient is extracted, to calculate a tripping risk of the whole line due to the lightning shielding failure.

Abstract: A system for checking metering accuracy of an EVSE unit includes an EVSE unit including a cable and a charge handle. The system includes an electric vehicle including a charging port configured to be coupled to the charge handle. The electric vehicle is configured to be charged by the EVSE unit using the cable and the charge handle. In place of the electric vehicle, an electric vehicle-emulating electric load can be used. The system includes an inline electric meter device having a terminal end and a distal end. The charging port of the electric vehicle is configured to be coupled to the terminal end of the inline electric meter device. The charge handle is configured to be coupled to the distal end of the inline electric meter device. The inline electric meter device may be connected in various configurations. The inline electric meter device includes a display, a microprocessor, test and diagnostic logic, a report generator, a camera, and/or a GPS receiver.

Abstract: A capacitance type rotation angle detection stage light includes a pivoting member and a supporting member for supporting the pivoting member. A reflecting grating is attached on the pivoting member, and the reflecting grating rotates along with the pivoting member. A signal grating is attached on the supporting member. The signal grating and the reflecting grating are arranged oppositely. The signal grating comprises capacitance emitting pieces, a capacitance receiving piece and shielding pieces. The reflecting grating comprises capacitance reflecting pieces that reflect signals sent from the capacitance emitting pieces to the capacitance receiving piece. Periodic excitation signals applied to the capacitance emitting pieces finally form a composite signal on the capacitance receiving piece through coupling of two pairs of capacitors that the capacitance emitting pieces and the capacitance reflecting pieces, and the capacitance reflecting pieces and the capacitance receiving piece.

Abstract: Disclosed are state monitoring method and system for a heating device including a conductive path that electrically series-connects heating elements. The method includes obtaining a potential difference of a conductive path portion including at least one of the heating elements, obtaining monitoring information used to monitor a state of the heating elements, and determining occurrence of an anomaly in the conductive path portion based on the obtained monitoring information. The step of obtaining the potential difference includes obtaining a first potential difference of a first conductive path portion and obtaining a second potential difference of a second conductive path portion that differs from the first conductive path portion. The monitoring information includes comparison information obtained by comparing potential differences including the first potential difference and the second potential difference.

Abstract: A test apparatus for testing a cable assembly includes a first air tightness tester, a second air tightness tester and an electrical tester. A first test device is operably connected to the first air tightness tester and the electrical tester, and a second test device is operably connected to the second air tightness tester and the electrical tester. With a first cable connector and a second cable connector of a cable installed on a respective one of the first test device and the second test device, an air tightness test and an electrical test are performed on the first cable connector and the second cable connector simultaneously.

Abstract: A cell potential measurement device has a measuring plane on which a cell suspension is dropped. The cell potential measurement device includes a plurality of working electrodes and a reference electrode. The plurality of working electrodes are two-dimensionally arranged in a working region of the measuring plane. The reference electrode is provided outside the working area of the measuring plane. A contact angle in a hydrophobic region between the working region and the reference electrodes of the measuring plane is larger than a contact angle in the working region.

Abstract: A peak current detector is integrated into a power supply, such as a power management integrated circuit, to detect glitch attacks imposed on the power rails inside the power supply. Integrated circuitry being supplied by the power supply periodically checks the state of the power supply via a secure communication channel to obtain the detected peak current values, which allow the integrated circuitry to detect those attacks and react accordingly to any possible threats.

Abstract: A method for detecting particles in a liquid includes following operations. A detection device is provided. A chemical liquid is provided to flow through the detection device. A capacitance of the detection device is measured during the flowing of the chemical liquid. A dielectric constant of the chemical liquid is calculated according to the capacitance of the detection device. When the dielectric constant of the chemical liquid is between an upper limit and a lower limit, the chemical liquid is determined to be normal.

Abstract: The present disclosure provides a fluid sensor and a method for fabricating a fluid sensor. The fluid sensor includes a substrate including a first material and having a first surface and a second surface opposite to the first surface, wherein the substrate further comprises a recess recessed from the first surface, a first conductive layer over the first surface of the substrate, a protection layer between the first surface of the substrate and the first conductive layer, wherein the protection layer includes a second material, and a through via connected to the recess.

Abstract: Aspects of the present disclosure are directed to a measurement module for measurement of a multi-electrode resistive sensing element with improved noise performance and accuracy. In some embodiments, stimulation to the sensing element is provided by a current path that originates from a signal source, through a switch block, through a pair of terminals, and ending at a reference node such as ground. An analog-to-digital converter (ADC) is coupled directly to one or both of the terminals to digitize a voltage. The ADC is coupled to terminals on the sensing element to measure a sensed voltage signal before the sensed signal goes through the switch block. As a result, the measured voltage signal may be free of noise that could be picked up from passing through the switch block, and accuracy of the resistance measurements on the sensing element can be improved.

Abstract: Method for evaluating electromagnetic performance of a permanent-magnet machine, wherein the method is implemented in a computer processer or in a controller of a permanent-magnet machine, calculating the magnetic field distribution by a sub-domain method; using current density of the equivalent current sheet to represent the boundary condition, iterating by the sub-do-main method and by the magnetic circuit method until a convergent result is obtained, calculating the electro-magnetic performance parameters on basis of the convergent result, so as to evaluate the electromagnetic performance.