Abstract: A method includes: calculating a first optimum quantity of ferromagnetic arranged at each position so that each error component of a magnetic field distribution in a specific space satisfies a first restriction condition (S33, S34); discretizing, for each position, the first optimum quantity (S35); calculating the error components that are obtained when ferromagnetic having a quantity of the first combination is arranged at each position (S36); when the error component is less than the first lower limit, setting a condition including a lower limit greater than the first lower limit and an upper limit greater than the first upper limit as a second restriction condition, and when the error component is greater than the first upper limit, setting a condition including a lower limit less than the first lower limit and an upper limit less than the first upper limit as a second restriction condition (S38).

Abstract: A contact monitoring means for monitoring an electrical, three-pole changeover contact includes: a signal generator, which generates a monitoring signal; a coupling means, which is connected downstream from the signal generator; a sensing circuit, which is connected downstream from the coupling means and which is coupled or can be coupled to the changeover contact. The monitoring signal generation of the signal generator and thus the monitoring signal and/or a signal derived from the monitoring signal can be changed as a function of a switching position of the changeover contact by means of the sensing circuit, which is coupled to the signal generator via the coupling means. The contact monitoring means also includes an evaluation means, which detects the monitoring signal and/or the signal derived from the monitoring signal and/or a change of the monitoring signal and/or a change of the signal derived from the monitoring signal.

Abstract: An embodiment is an automated test equipment (ATE) for testing a device under test (DUT) which is connected to the ATE via a load board. The ATE includes a stimulus module, a measurement module, a loopback, a first switch, a second switch, and a load board interface. The load board interface includes a first radio frequency port and a second radio frequency port. The first and second radio frequency ports are configured to be coupled to the respective ports of the load board. The first switch is configured to couple the first radio frequency port to the stimulus module in a first switching state of the first switch and the second switch is configured to couple the second radio frequency port to the measurement module in a first switching state of the second switch.

Abstract: The disclosure concerns a method for determining a predicted state of health of a device battery in a battery-operated machine. A state of health characteristic model for a state of health time characteristic is provided using a number of linked parameterizable characteristic functions that each indicate a state of health over a time period of ageing times, the characteristic functions being initially parameterized. A number of data points are captured that each indicate a state of health and an ageing time. A parameter of one of the characteristic functions is adapted based on the data points in the respective time periods of the characteristic functions. A parameter of another of the characteristic functions, for which there is no data point available, is also adapted. The state of health characteristic model is provided based on the adapted characteristic functions.

Abstract: A non-contact electric potential meter system to determine voltage between an AC conductor and a reference potential without direct electrical contact to the conductor. A housing provides a shielded measurement region that excludes other conductors and holds power supply means; an AC voltage sensing mechanism includes a conductive sense plate and an electrical connection to the reference potential. Waveform-sensing electronic circuitry obtains an AC voltage waveform induced by capacitive coupling between the conductor and the conductive sense plate. Capacitance-determining electronic circuitry obtains a scaling factor based on the coupling capacitance formed between the conductor and the conductive sense plate. Signal processing electronic circuitry uses the AC voltage waveform and the coupling capacitance-based scaling factor to obtain the voltage between the conductor and the reference potential.

Abstract: Calibrating a battery including identifying a historical discharge rate of the battery; segmenting the historical discharge rate of the battery into regions; determining, based on the historical discharge rate of the battery, a first historical charge capacity of the battery for a first region and a second historical charge capacity of the battery for a second region; discharging, at an updated discharge rate, the battery from a first threshold voltage to a second threshold voltage; calculating, based on the updated discharge rate, a first updated charge capacity of the battery for the first region; determining a full charge capacity of the battery based on i) the first updated charge capacity of the battery for the first region and ii) the second historical charge capacity of the battery for the second region; adjusting a charging current of the battery based on the determined full charge capacity of the battery.

Abstract: Disclosed herein are thermal heads and corresponding test systems for independently controlling a one or more components while testing one or more devices under test. In some embodiments, a thermal head comprises a plurality of adapters, one or more heaters, and one or more thermal controllers for independently controlling temperatures of the components. The thermal controllers may control the temperatures of at least some of the components independently such that thermal control of one component does not affect the thermal control of the other component. In some embodiments, the thermal control is by way of one or more cold plates, and the thermal head comprises one or more cold plates. Embodiments of the disclosure further include independent control of one or more forces using one or more force mechanisms.

Abstract: A system for enhancing a coupling laser beam to create a larger beam radius thus increasing sensitivity inside the system. The system includes a coupling laser source to emit a coupling laser defining a first power level. The system also includes a resonant optical cavity that is optically aligned with the coupling laser source and the probe laser source. The resonant optical cavity enhances the coupling laser to a second power level that is greater than the first power level inside of the resonant optical cavity. The power increase of the coupling level also increases the sensitivity of the atomic receiver system by increasing the diameter of the coupling laser inside of the resonant optical cavity. The system also includes at least one photodetector positioned outside of and optically aligned with the resonant optical cavity for monitoring a resonance condition of the coupling laser circulating within the resonant optical cavity.

Abstract: Systems, circuits, and methods provide self-calibration for magnetoresistance-based magnetic field sensors. Examples can include use of a closed loop acting as a feedback or calibration loop that is configured to process a reference signal applied to one or more magnetoresistance elements in a MR-based magnetic field sensor that also detects one or more external magnetic fields. The closed loop can adjust a bias voltage applied to the one or more magnetoresistance elements based on the reference signal. The calibration loop can accordingly provide for automatic or self-calibration of sensitivity of one or more magnetoresistance elements of the sensors to compensate for external factors affecting sensitivity of the one or more magnetoresistance elements.

Abstract: An electronic device is provided. The electronic device includes a plurality of signal lines and a testing circuit. The testing circuit includes a plurality of output channels electrically connected to some of the plurality of signal lines and a plurality of switches. The plurality of switches are connected to the plurality of signal lines via the plurality of output channels. The overall plurality of output channels of the testing circuit are less than the overall plurality of signal lines in quantity. There are at least two via holes overlapping one of the plurality of output channels.

Abstract: One or more examples relate, generally, to reducing error in estimated angular position of a rotor of a motor. In one example, a method comprises generating an error signal indicating error in the estimated angular position; determining an adjustment amount associated with an estimated torque-producing component of motor winding current of a stator of the motor; generating an adjustment signal corresponding to the determined adjustment amount; and combining the error signal and the adjustment signal to generate a corrected error signal.

Abstract: A magnetic gradiometer can be used in systems or methods for nondestructive testing, even when the material being tested is weakly magnetic. The magnetic gradiometer can include a printed circuit board (PCB) comprising a first end and a second end separated by a base length; an excitation coil encircling at least a portion of the PCB and configured to deliver an alternating current (AC) to generate an excitation magnetic field; and a differential sensor. The differential sensor can include a reference magnetic tunneling junction in magnetic vortex state (vortex MTJ) sensor array at the first end to generate a voltage based on the excitation magnetic field; and a signal vortex MTJ sensor array at the second end to generate another voltage based on the excitation magnetic field due to a composition of the measurement target. The second end of the PCB can be oriented towards the measurement target.

Abstract: A current sensor includes a magnetic sensor configured to detect a magnetic field generated by a current to be measured flowing through a current path and a shielding member including a first shield, a second shield, and a third shield disposed away from each other. The first shield is disposed on an opposite side of the current path from the magnetic sensor in a first direction in which the magnetic sensor and the current path oppose each other and includes a first opposing surface opposing the current path. The second shield includes a second opposing surface along the first direction. The third shield includes a third opposing surface along the first direction. The second shield and the third shield are disposed such that the second opposing surface and the third opposing surface oppose each other, with the magnetic sensor and the current path sandwiched therebetween.

Abstract: A current sampling system, the system including a magnetic component, that is an inductor or a transformer that has at least one winding, where the at least one winding has a first part and a second part, where a first terminal of the first part is connected to a first terminal of the second part, and where a second terminal of the first part is separated from a second terminal of the second part, and a current detection circuit, where the second terminal of the second part is connected to the current detection circuit, and where the current detection circuit is configured to sample a current flowing through the second part, and obtain a total current of the winding based on the sampled current flowing through the second part and a preset ratio.

Abstract: A probe station includes a frame, a platform, a testing equipment, a probe holder and at least one probe. The frame defines an accommodation space. The platform is connected with the frame. The platform has an opening. The opening is communicated with the accommodation space. The testing equipment is at least partially disposed in the accommodation space and is at least partially exposed through the opening. The probe holder is disposed on the platform. The probe is held by the probe holder. The probe holder is configured to control the probe to contact with a device under test disposed on the testing equipment through the opening.

Abstract: Optical calculation method and system for relay protection based on Faraday magneto-optical rotation effect are provided. A cascaded optical computing approach is employed, where three optical current transformers are connected in series on a single optical path. Final output optical signal represented as a cascaded multiplication of outputs of three optical current transformers, carries a Faraday rotation angle containing differential current information. Differential current required for protection is computed by modulation ratio which is calculated by use of a carrier and modulation wave signals of the output optical signal detecting by filtering circuit from the third optical current transformer.

Abstract: Disclosed are a device and method for detecting defects of a high-voltage cable cross-bonded grounding system. The method selects a protective grounding box of a cross-bonded grounding system, respectively connects a signal excitation coupler to A-phase, B-phase and C-phase coaxial cables of the protective grounding box, selects a stable signal with a frequency different from a power frequency or a field interference frequency, and tests effective current values and phases responded by the A-phase, B-phase and C-phase coaxial cables when the stable signal with the frequency F1 is injected into the A-phase, B-phase and C-phase coaxial cables of the protective grounding box; and obtains resistances and inductances of branch circuits of the cable cross-bonded grounding system by calculation according to measurement data, and determines if the cable cross-bonded grounding system has a connection defect.

Abstract: A display panel is provided. The display panel includes display elements in a display area; a touch electrode layer at least partially in the display area, wherein the display elements and the touch electrode layer are absent in a window region that is at least partially surrounded by the display area and a crack detection circuit. The crack detection circuit includes an integrated circuit; and a first conduction loop electrically connected to the integrated circuit. The first conduction loop includes a window region crack detection line substantially surrounding the window region; and at least a portion of the first conduction loop includes a first metal line in a first layer and a second metal line in a second layer, the first metal line connected to the second metal line through a via extending through a touch insulating layer.

Abstract: Two sets of the DC voltages are determined from among sets of DC voltages. At a first temperature, a first voltage of one of the two sets and a first voltage of the other one of the two sets surround a detection voltage that varies substantially proportionally to temperature. The detection voltage is compared with a second voltage of one of the two sets.

Abstract: A method for estimating a thickness for each of a plurality of nested tubulars may include disposing an electromagnetic (EM) logging tool in a wellbore, transmitting an electromagnetic field from the transmitter into one or more tubulars to energize the one or more tubulars with the electromagnetic field thereby producing an eddy current, and measuring the electromagnetic field generated by the eddy current. Additionally, the method may include defining a prior distribution of at least one pipe thickness log based on the plurality of measurements, processing a first set of measurement depth points to estimate one or more tubulars at one or more depths in the wellbore, computing a posterior distribution of the thickness log based at least in part on the prior distribution and the one or more thicknesses, and determining a second set of measurement depth points to process based on the posterior distribution.