Abstract: The voltage hold circuit is a voltage hold circuit configured to operate every processing cycle, the processing cycle including a hold period and a reset period following the hold period, and hold a voltage value for an input voltage signal, the voltage hold circuit including: a first hold circuit configured to operate to hold a minimum voltage value for the input voltage signal in the hold period every the processing cycle; and a second hold circuit configured to operate to hold a maximum voltage value for the input voltage signal in the reset period every the processing cycle.

Abstract: A system for detecting a fault type and faulted phase in a power grid includes a controller and a relay. The relay is configured to monitor a line of the power grid and generate a monitoring signal. The controller may be configured to determine, in response to the monitoring signal received from the relay, sequence voltages and sequence currents in the line. The controller may further determine, in response to the sequence voltages and sequence currents, an absence or a presence of a weak-infeed condition in the line. The controller may further determine, in response to the monitoring signal and the absence or the presence of the weak-infeed condition, a first plane sequence signature and a second plane sequence signature. The controller may further determine a fault type and faulted phase in the power grid in response to the first plane sequence signature and the second plane sequence signature.

Abstract: An angular position sensor system includes a two-pole magnet rotatable about a rotation axis; a magnetic sensor device having a plurality of horizontal Hall elements including at least a first, second and third horizontal Hall element located on a virtual circle having a centre located on the rotation axis. The Hall elements are spaced by multiples of 90. The magnetic sensor device has a processing unit connected to the horizontal Hall elements for obtaining a first, second and third signal, and for determining a first pairwise difference between the first and second sensor signal, and for determining a second pairwise difference between the second and third sensor signal, and for determining an angular position of the magnet relative to the sensor device based on a ratio of these pairwise differences.

Abstract: Methods and apparatus for determining signal offset correction signals. In embodiments, first and second magnetic field sensing elements generate first and second channels that are in quadrature. Signal correction processing includes storing amplitudes of the first and second channel signals when an amplitude of the channel signals cross zero and determine an offset of the first and second channel signals based on the stored amplitudes.

Abstract: A sensor includes a plurality of detecting units and a sensing unit. Each of the detecting units includes a pair of electrodes and a detecting area formed between the electrodes, and is configured to cause a change in electrical resistance between the electrodes as conductive particles accumulate. The sensing unit outputs a sensing signal if at least two or more of the detecting units experience a change in electrical resistance.

Abstract: A device and a method for detecting LEDs bonded to a display substrate are provided. The device includes a power supply assembly, a pressure fixture and a detector. The power supply assembly is used for providing electrical signals to the LEDs. The pressure fixture is used for applying a force to the power supply assembly, so that the power supply assembly directly contacts and electrically connects to at least one of the LEDs. The detector is on a side of the pressure fixture away from the power supply assembly and used for detecting whether each of the LEDs emits light according to a normal standard.

Abstract: Position sensing units, comprising a magnetic assembly (MA) having a width W measured along a first direction and a height H measured along a second direction and including at least three magnets having respective magnetic polarizations that define along the first direction at least a left MA domain, a middle MA domain and a right MA domain, wherein the magnetic polarizations of each MA domain are different, and a magnetic flux measuring device (MFMD) for measuring a magnetic flux B, wherein the MA moves relative to the MFMD along the first direction within a stroke L that fulfils 1 mm?L?100 mm, stroke L beginning at a first point x0 and ending at a final point xmax, and wherein a minimum value Dmin of an orthogonal distance D, measured along the second direction between a particular MA domain and the MFMD, fulfills L/Dmin>10.

Abstract: To provide an abnormality detection apparatus for resolver which can determine the abnormality of at least the first system, even if the period of the excitation AC voltage of the first system and the period of the excitation AC voltage of the second system are different periods, and the magnetic interference between systems occurs. An abnormality detection apparatus for resolver applies an AC voltage of a first period to a first system excitation winding; applies an AC voltage of a second period different from the first period to a second system excitation winding; calculates a first system square sum which is a sum of square values of the detection values of output signals of first system two output windings after the second period component reduction processing: and determines abnormality of first system based on whether or not the first system square sum is within a normal range of first system.

Abstract: A resistance measurement system includes a plurality of resistors connected in series along a single line. The plurality of resistors includes N resistors. The system includes a plurality of capacitors for at least N?1 of the resistors. Each capacitor is connected in parallel to the single line with a respective resistor to form a respective resistor-capacitor (RC) pair. Each RC pair includes a different time constant such that each RC pair reaches a steady state voltage at a different time. The system includes a current supply connected to the single line to supply a current to the line. The system includes a control module configured to sense a total voltage across the single line and to successively determine resistance of each resistor from the total voltage based on the current, a known total steady state voltage, and known time-to-steady-state-voltages of each RC pair and/or resistors.

Abstract: A sensor and a method of measuring an electrical characteristic of a conductor is provided. The sensor includes a first and second housings slidably coupled to move from a first to a second position. A first set of magnetic field sensors are coupled to the first housing. Each of the first magnetic field sensors having a different sensing axis and output a first signal in response to power flowing through the conductor. A second set of magnetic field sensors are coupled to the second housing. Each of the second magnetic field sensors having a different sensing axis and output a second signal in response to power flowing through the conductor. A circuit is coupled to receive signals from the first and second magnetic field sensors. The circuit is configured to generate a low energy signal in response to receiving the first and second signals.

Abstract: A method and system for analyzing Vertical-Cavity Surface-Emitting Lasers (VCSELs) on a wafer are provided. An illustrative method of is provided that includes: applying a stimulus to each of the plurality of VCSELs on the wafer; measuring, for each of the plurality of VCSELs, two or more VCSEL parameters responsive to the stimulus; correlating the measured two or more VCSEL parameters to define a value of a common performance characteristic; and identifying clusters of VCSELs having similar values of the common performance characteristic. The clusters of VCSELs may be determined to collectively meet or not meet an optical performance requirement defined for the VCSELs on the wafer.

Abstract: Poor opening is detected with certainty and reliability with respect to a ground line of an integrated circuit device regardless of the connection state of a load and the operating state of a drive circuit. In an integrated circuit device 10, a drive circuit 30 switches between conduction and interruption of a load current using switch elements 40 and 45. The ground line 31 is grounded via the GND terminal 32 to the common ground provided outside the integrated circuit device 10 and is connected to the drive circuit 30. The ground line 21 is grounded to the common ground via the GND terminal 22 and is connected to the control circuit 20. The diagnostic current supply circuit 90 supplies a predetermined diagnostic current to the ground line 31. The rectifying elements 61 and 62 are connected between the ground line 21 and the ground line 31.

Abstract: A system for magnetically inspecting a metallic component uses a manipulator configured to manipulate a relative position between a part fixture that holds the metallic component and a probe fixture that holds a magnetic probe, thereby causing the probe tip to trace an inspection route along the surface of the metallic component so that the probe tip contacts the metallic component such that an angular difference between the probe axis and a vector normal to the surface is less than a predetermined angle delta. The magnetic probe has a probe tip that measures magnetic permeability of the metallic component along the inspection route, which the controller receives. A method of performing the magnetic inspection is also disclosed.

Abstract: An apparatus for generating high voltage (HV) driving signals associated with an ion mobility detector comprises a ground-based HV base module and a HV deck module coupled by an interconnect module. The HV base module implements dual power supplies that together drive a drift tube voltage signal to the high-voltage-based deck module. Each of the power supplies is regulated by a combination open loop and closed loop controller. The HV deck module implements one or more grid modules that generate a bipolar voltage that floats on the drift tube voltage signal. Also included may be a pulse generator configured to generate at least one synchronizing timing pulse. Power supplies within the apparatus may be synchronized based on the synchronization timing pulse.

Abstract: A test element group (TEG) disposed adjacent to at least one memory chip on a wafer includes a ring oscillator configured to output a clock signal based on a direct current (DC) signal received through a first pad and from a test device, a first divider configured to divide the clock signal and to output a first divided signal, and a sequential circuit set configured to receive the clock signal and the first divided signal, to generate a test signal based on the clock signal and the first divided signal, and to output the test signal to the test device through a second pad. The sequential circuit set includes a sequential circuit having a configuration corresponding to at least one circuit included in the at least one die.

Abstract: A position detector includes a position detection magnet unit installed at each of a plurality of carriers, and a position detection unit. The position detection magnet unit includes a plurality of magnets disposed such that different magnetic poles are arranged alternately in a transport direction of the carriers, and side magnetic shielding portions installed at the ends of the position detection magnet unit. The position detection unit includes: a processing substrate disposed in parallel to the transport direction of the carriers; a plurality of magnetic detection elements disposed side by side in the transport direction of the carriers on a front side of the processing substrate; and a substrate-side magnetic shielding portion opposite the magnetic detection elements, the substrate-side magnetic shielding portion being installed on a back side of the processing substrate.

Abstract: A photovoltaic power generation system and a method and a device for detecting an earth fault of a photovoltaic string. The controller obtains a terminal voltage of each photovoltaic string before voltage disturbance, where the terminal voltage is a voltage to earth of a positive electrode or negative electrode of the photovoltaic string; performs voltage disturbance on each photovoltaic string and obtains a terminal voltage of each photovoltaic string after the voltage disturbance; determines a photovoltaic string with an earth fault based on the terminal voltage of each photovoltaic string before and after the voltage disturbance; obtains a photovoltaic panel with an earth fault by using the terminal voltage and an output voltage of the photovoltaic string before the voltage disturbance, or obtains a photovoltaic panel with an earth fault by using the terminal voltage and an output voltage of the photovoltaic string after the voltage disturbance.

Abstract: A magnetic position sensor comprises a first magnetic rod including a first end and a second end, and a second magnetic rod including a third end and a fourth end, the first end and the third end at a first distance, the second end and the fourth end at a second distance greater than the first distance. The magnetic position sensor further includes a magnet configured to travel relative to the first magnetic rod and the second magnetic rod along a first axis, and one or more magnetic sensors communicatively coupled to the magnet.

Abstract: An angle detector includes a rotary scale having a scale pattern in which a plurality of patterns are arrayed along a circumference direction of the rotary scale, and a plurality of detection heads, each of which detects the plurality of patterns from the scale pattern. The plurality of detection heads are shifted from each other in the circumference direction of the rotary scale and are shifted from each other in a radial direction of the rotary scale.

Abstract: The present disclosure relates to systems and methods for improved anomaly detection for rotating machines. An example method may include determining a rotational speed of a rotating machine; determining, using a frequency domain transform of a signal, a frequency domain signal; determining, based on the rotational speed, a first frequency band within the frequency domain signal for identifying a fault frequency; determining a fault frequency within the first frequency band; determining, based on the fault frequency, a second frequency band within the first frequency band, wherein the second frequency band includes the fault frequency; determining, based on the second frequency band, a first fault index and a baseline of the first fault index; determining, based on a deviation of a second fault index from the baseline, a fault condition; and providing an alert based on the fault condition.