Abstract: Gain independent reference channel measurement system and method. A method of making robust, stable measurements, in a variety of different applications is disclosed. More specifically, this disclosure describes systems and methods relating to performing gain independent reference channel measurements by making two phase measurements of a device under test. Mathematically, the measurements are combined and many common mode parameters drop out. The result yields an analysis of a device under test analysis which mitigated errors, predominately arising from environmental variations and changes in circuit behavior stemming from swings in signal input.

Abstract: A current transformer according to the present invention may comprise a magnetic core, a secondary coil, and a magnetic flux compensation member. A main circuit of an air circuit breaker penetrates the magnetic core. In addition, the secondary coil is arranged to be adjacent to the magnetic core, and a secondary current is induced through a current flowing in the main circuit. In addition, the secondary coil supplies the induced secondary current to a relay. The magnetic flux compensation member may be coupled to the magnetic core so as to correct magnetic flux of the secondary coil.

Abstract: An apparatus for inspecting light emitting elements, a method of inspecting light emitting elements using the apparatus, and a method of manufacturing display device using the apparatus are provided. The apparatus includes a flow path unit extending in one direction and including a flow path along which a solution in which light emitting elements are mixed moves, at least one alignment unit to which the flow path extends from at least a portion of the flow path unit, a packaging unit at an end of the flow path unit and in which the light emitting elements are stacked, and a plurality of alignment electrodes on an outer surface of the alignment unit.

Abstract: The invention relates to an apparatus for detecting a key press comprising a circuit substrate, a key module with a key cap and a movement mechanism, and a device for detecting the movement of the key cap, wherein the movement mechanism has at least one movement element wherein this device comprises an electrical resonance circuit with at least one capacitor and with a primary coil and comprises a secondary coil wherein the device for detecting the movement of the key cap comprises a measuring device for detecting and/or processing at least one physical variable of the electrical resonance circuit, which variable changes during the movement of the key cap, and outputs at least one electrical signal that is dependent on the change in the physical variable. The invention also relates to a keyboard comprising one or more such apparatuses and to a method for detecting a key press.

Abstract: A system comprises a noise generator circuit and a noise envelope detector circuit. The noise generator circuit comprises a first amplifier including a single transistor pair that is operable to generate 1/f noise, an output amplifier coupled to the first amplifier and configured to generate a 1/f noise signal as a function of the 1/f noise. The noise envelope detector circuit comprises a low pass filter operable to pass low frequency signals of the 1/f noise signal as a filtered 1/f noise signal, and a second amplifier or a comparator coupled to the low pass filter and operable to output a direct current (DC) voltage signal according to an envelope of the filtered 1/f noise signal, where the DC voltage signal is a function of an envelope of the filtered 1/f noise signal.

Abstract: A non-transitory computer-readable medium storing a program that causes a computer to execute a process including, calculating, for each of a plurality of groups each of which is a combination of two power distribution lines selected from a plurality of power distribution lines, an index value that indicates a correlation between time-series data of a sum of line currents that flow through the two power distribution lines included in a group and time-series data of consumed power consumed by at least one consuming subject coupled to a transformer coupled to any one of phases that corresponds to combinations of two of the plurality of power distribution lines or current that corresponds to the power; and determining that a phase that corresponds to the group that corresponds to the index value indicating a highest correlation among the plurality of groups is a connection phase to which the transformer is coupled.

Abstract: This disclosure relates to systems and methods for current source temperature compensation for use during cryogenic electronic testing. A temperature compensation circuit can provide a temperature compensation signal to a current source circuit configured to provide an electrical current for testing a cryogenic device under test to compensate for temperature effects on the current source circuit based on a time constant adjustment signal. The time constant adjustment signal can adjust a time constant of the temperature compensation circuit to delay by a given amount of time that the temperature compensation circuit compensates for the temperature effects on the current source circuit. A controller can be configured to execute a temperature compensation method to provide the time constant adjustment signal based on at least one temperature signal characterizing a temperature of an environment that includes the current source circuit or a temperature of the current source circuit.

Abstract: A system and method is provided for measuring a voltage drop at a node. In embodiments, a circuit includes an analog-to-digital converter, a current sink, and a controller. The input of the analog-to-digital converter and the input of the current sink is coupled to the node to be measured. A set point for the current sink is determined. The output of the analog-to-digital converter during the voltage drop is sampled. And a relative voltage drop value is computed by subtracting the sampled output of the analog-to-digital converter during the voltage drop from a sampled output of the analog-to-digital converter during a steady-state condition. The current sink operating at the set point during the steady-state condition and during the voltage drop.

Abstract: A wiring structure includes a wiring such as a flexible printed wiring board, a permanent magnet, and a relay piece. The wiring has a conductive portion. The permanent magnet has electrical conductivity. The relay piece is formed of a conductive metal and connected to the conductive portion of the wiring. The relay piece has the permanent magnet fixed thereto by magnetic attraction.

Abstract: A method for detecting a tripping of a disconnection unit in an electrical enclosure, the electrical enclosure including at least one disconnection unit for disconnecting electric current and at least one switching unit for switching the electric current, the method including a learning phase configured to generate decision-making categories associated with an acoustic signature of the tripping of the at least one disconnection unit, and a phase of detecting the tripping of the disconnection unit, including: acquiring a unit noise signal generated by at least one of the disconnection units for disconnecting the electric current or at least one switching unit for switching the electric current, and comparing the unit noise signal with the decision-making categories in order to detect whether the unit noise signal corresponds to the tripping of the disconnection unit.

Abstract: Systems, devices, and associated methods are provided for testing and tuning radiofrequency (RF) modules. An example system includes a test station including an imaging device, a measurement device, and a robotic arm. The system may include a rotary stage coupled with the robotic arm, measurement probes disposed in the rotary stage and operably coupled with the measurement device, and tuning tips disposed in the rotary stage. The system may include a galvo scanner and laser to remove conductive material. In operation, the test station may perform a testing procedure on an RF module where the measurement probes generate testing data indicative of testing parameters. The test station may perform a tuning procedure on the RF module where a tuning tip or the laser modifies the RF module based on the testing parameters. The testing and tuning may be performed by a user, semi-autonomously, or autonomously.

Abstract: A vehicle seat comprises a seat component having a contour; wherein the contour changes when at least a portion of a user's body is in contact with the seat component and at least one multibend sensor operatively connected to the seat component and adapted to at least partially conform to the contour of the seat component; the at least one multibend sensor comprising a signal generation source adapted to transmit signals and a signal receiver adapted to receive at least some of the transmitted signals. The seat further comprises a signal processor operatively connected to the signal receiver, the signal processor adapted to make at least one measurement associated with the received signals; and, a sensing module operatively connected to the signal processor and configured to use the at least one measurement to determine information regarding the contour of the seat component.

Abstract: A conductive particle detecting device includes a plurality of electrodes, a permanent magnet, and a detecting circuit. The plurality of electrodes are arranged at intervals in a lubricant. The permanent magnet accumulates conductive particles in the lubricant between adjacent electrodes by a magnetic force. The detecting circuit detects target conductive particles based on electrical resistance between the adjacent electrodes. An attractive force of the permanent magnet acting on the conductive particles between the adjacent electrodes is set such that the lubricant remains as a non-conductive layer around fine-sized conductive particles having a smaller particle size than the target conductive particles.

Abstract: A pH sensor includes a glass electrode unit to respond to pH; a comparative electrode unit to be measured for its potential relative to the glass electrode unit; a main pipe to convey test liquid; and a fluid inlet connected to the glass electrode unit and the main pipe. The glass electrode unit includes: a first storage unit filled with electrolyte solution; a first electrode to electrically connect the inside and outside of the first storage unit; a glass film disposed between the first storage unit and the main pipe; and a first pressure transmission unit connected to the fluid inlet. The first pressure transmission unit regulates the internal pressure of the first storage unit to control the pressure difference between the first storage unit and the main pipe separated by the glass film.

Abstract: Systems, devices, and associated methods are provided for testing and tuning radiofrequency (RF) modules. An example system includes a test station including an imaging device, a measurement device, and a robotic arm. The system may include a rotary stage coupled with the robotic arm, measurement probes disposed in the rotary stage and operably coupled with the measurement device, and tuning tips disposed in the rotary stage. The system may include a galvo scanner and laser to remove conductive material. In operation, the test station may perform a testing procedure on an RF module where the measurement probes generate testing data indicative of testing parameters. The test station may perform a tuning procedure on the RF module where a tuning tip or the laser modifies the RF module based on the testing parameters. The testing and tuning may be performed by a user, semi-autonomously, or autonomously.

Abstract: A connector detecting device for a connector includes a test vehicle, including a plurality of detecting points, to assemble with the connector; and a function module, formed an electrical connection with the test vehicle, configured to determine a conduction status between the connector and the test vehicle according to a loop of the plurality of detecting points and the connector.

Abstract: A method of estimating a nitrogen site carbon concentration, in a first epitaxial layer made of carbon-doped gallium nitride of an electronic component, including steps of: estimating an electric capacitance of a stack interposed between the first layer and a first electrode of the component; heating the component; measuring an offset of a threshold voltage of the component; and deducing therefrom a nitrogen site carbon surface concentration in the first layer.

Abstract: A ground and test (G&T) device includes a test device housing having load and line conductors and a plurality of upper terminals and plurality of lower terminals carried by the test device housing and configured to engage the load and line conductors when the test device housing in installed within the compartment of the switchgear frame. A lower ground bus bar is carried by the test device housing and a plurality of grounding bars selectively connect either the upper terminals to the lower ground bus bar or connect the lower terminals to the lower ground bus bar. A ground shoe assembly is connected to the lower ground bus bar and configured to engage a grounding circuit carried by the switchgear frame.

Abstract: Provided is a voltage monitoring module which includes: a land; and a metal plate arranged on the land and soldered to the land, in which a through-hole is partially formed at a location of the metal plate corresponding to the land, a non-formation area is formed at a location of the land corresponding to part of the through-hole, and no conductor is formed in the non-formation area.

Abstract: A system includes an alternating current (AC) power component, a cable, a sensor transformer, and a sensor. The cable is coupled to the AC power component and is can conduct current to the AC power component. The sensor transformer includes a coil disposed proximate to the cable. The coil generates an induced voltage responsive to conduction of the current through the cable. The sensor is coupled to the sensor transformer and receives power from the sensor transformer. The sensor obtains information corresponding to operation of the AC power component.