29 results about "Dc potential" patented technology

The present invention discloses a method for measuring the axial crack growth rate of a pipeline based on the DC potential drop method. First, a reference sample containing double cracks and having the same material and geometric dimensions as the sample being tested is prepared, and the crack length of the reference sample is known; then, a DC potential drop measuring device is used to pass a DC current through the reference sample and the sample being tested, respectively, and the voltage between each pair of potential probes is measured and recorded; next, the relationship between the voltage of the sample being tested and time is converted into the relationship between the crack length and time through a calibration formula; finally, based on the relationship between the crack length of the sample being tested and time, the derivative of the crack length with respect to time is solved to determine the crack growth rate of the sample being tested. The method of the present invention has simple equipment and is easy to operate. The calibration formula it relies on is highly universal and reliable.

A semiconductor integrated circuit device capable of inputting a signal of a MEMS transducer 2 includes: a power supply circuit 11 for the MEMS transducer 2; an input amplifier 12 for inputting and amplifying a signal of the MEMS transducer 2; a line driver 13 for amplifying an output from the input amplifier 12 and allowing for driving of a load connected to an output terminal T3, the line driver 13 having an input terminal; and the output terminal T3 for outputting an output of the line driver 13, wherein the power supply circuit 11, the input amplifier 12, and the line driver 13 are integrally formed on a semiconductor substrate, and wherein a gain setting circuit 14 for determining gain of the line driver 13 and a DC potential of the output terminal T3 is connected to the input terminal of the line driver 13.

a mass filter comprising a plurality of mass filtering electrodes for mass filtering ions passing therethrough, at least a first of the electrodes having a first gap therethrough; a voltage source arranged and configured to apply a voltage to the mass filtering electrodes such that ions having a mass to charge ratio within a mass transmission window are confined by the electrodes and transmit through the mass filter, while at least some ions having a mass to charge ratio outside the mass transmission window are unstable and pass through the first gap to be filtered by the mass filter; a first collector electrode arranged to receive ions transmitting through the first gap, and the voltage source applying a DC potential difference between the first mass filtering electrode and the first collector electrode so as to force ions transmitting through the first gap onto the first collector electrode;

Frequency Detection Pixel This description concerns a pixel (PIX2) comprising a first node (202), a second node (200) configured to receive a first DC potential (Vdd2), and a plurality of acquisition channels (CH1, CH2), each comprising: a photodiode (PD1, PD2) adapted to detect radiation (SIGL) in a first wavelength range; a capacitive element (Cc1, Cc2) coupling the photodiode to the first node (202); and a resistive element (R1, R2) coupling a first terminal (K1, K2) of the photodiode (PD1, PD2) to the second node (200). Figure for the abstract: Fig. 2

Power electronic submodule (2) with a switching device comprising a substrate (4) having a first DC potential conductor (42) with a first DC potential connection surface (426) arranged thereon and a second DC potential conductor (44) with a second DC potential connection surface (446) arranged thereon, wherein the DC potential connection surfaces (426, 446) are preferably arranged directly adjacent to each other, as well as an AC potential conductor (43) and an AC potential connection surface (436) thereon, comprising a plurality of power semiconductor devices (50), comprising an internal connection device (52) which is in the form of a film stack consisting of one or more at least partially structured and alternately arranged electrically insulating and electrically conductive films, and comprising a pressure device (9) comprising a pressure element (92),which has a dimensionally stable pressure body (920) and a plurality of rigid or elastic pressure elements (922) and presses on sections of the connection device (52), wherein the first and second DC potential connection surfaces (426, 446) as well as the AC potential connection surface (436) are designed and provided to be directly, with correct polarity and electrically conductive, connected to external DC or AC potential connection elements (60, 64) not belonging to the submodule (2), whereby the substrate (4) is simultaneously pressed onto a support device (3) in the sections of the DC potential connection surfaces (426, 446) as well as the AC potential connection surface (436), and wherein the pressure element (92) has additional pressure bodies (924).which press on the side of the AC potential connection element (60) and the DC potential connection element (64) facing away from the substrate (4), and which is introduced via a pressure introduction element (90) that not only exerts central pressure on the pressure element (92), but also exerts pressure aligned with the respective connection surfaces (426, 436, 446) of the conductor tracks and the associated DC and AC potential connection elements (60, 64).

The present teachings generally relate to generating a pseudo-barrier via an axial RF field. A first voltage is applied to a first pair of rods arranged in a multi-pole configuration, a second RF voltage is applied to a second pair of rods, and a difference between magnitudes and / or phases of the first and second RF voltages is adjusted. As discussed in more detail herein, such a pseudo-barrier may be employed in a variety of different applications. As an example, such a pseudo-barrier may be used to trap ions within a rod group that includes a plurality of rods arranged in a multi-pole configuration. In other applications, adjusting the height of the pseudo-potential barrier established in the rod set along with the application of a DC potential between the rod set and an external electrode can be used to cause mass-selective extraction of ions trapped within the rod set. In other applications, such a pseudo-barrier may be employed in a multiplexing method to perform mass spectrometry.

An ion trap includes a multipole electrode assembly, a first confinement electrode, and a second confinement electrode. The multipole electrode assembly is configured to confine ions of the first polarity in an ion channel extending in an axial direction of the multipole electrode assembly. The first confinement electrode is disposed adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly. The second confinement electrode is disposed adjacent to the multipole electrode assembly and extends in the axial direction of the multipole electrode assembly in alignment with the first confinement electrode. The first and second confinement electrodes are spaced apart in the axial direction so as to define an ion confinement region of the ion channel between the first and second confinement electrodes. The first and second confinement electrodes are configured to receive a DC potential of the first polarity to further confine ions in the ion confinement region within the ion channel.

The present invention comprises a multipole ion guide comprising a plurality of multipole electrodes (21, 22) grouped into a first group and a second group forming a pseudopotential and a DC potential; and an RF power supply (303) applying an RF voltage to each of the plurality of multipole electrodes, and a DC power supply (302) applying different offset DC voltages to the multipole electrodes of the first group and the multipole electrodes of the second group, wherein only multipole electrodes of the first group are arranged in a first plane orthogonal to a central axis of the multipole ion guide (4), wherein the RF voltage and the different offset DC voltages are applied to the multipole electrodes (21, 22) such that the pseudopotential has a local minimum point in a second plane.in the multipole electrodes of both the first group and the second group are arranged and which is parallel to the first plane, wherein the local minimum point of the pseudopotential formed by the multipole electrodes of the first group and the local minimum point of the pseudopotential formed by the multipole electrodes of the second group are the same, and wherein in the second plane a synthetic potential of the pseudopotential and the DC potential has a local minimum point in a position that differs from a position of the local minimum point of the pseudopotential.

A power support arrangement (10) for an electrical grid (24) and comprising a DC network (16) comprising a first DC line (DCL1) having a first DC potential, a second DC line (DCL2) having a second DC potential and an energy storage system comprising a first energy storage unit (18) between the first and second DC lines; a first set of Y-shaped phase arms (12) between the electrical grid and the first DC line (DCL1); a second set of Y-shaped phase arms (14) between the electrical grid (22) and the second DC line (DCL2), wherein the first and second sets of phase arms are controllable as voltage source converters for supporting the electrical grid with active power from the energy storage system; and a third set of phase arms (24) connected to the electrical grid in a Y-shaped configuration, having a neutral point and controllable to support the electrical grid with reactive power.

Systems, methods and software products comprising: providing cell measurement signals (CMs) associated with electrical energy storage component stack (CMs are referenced to ground potential (GP) at a local ground terminal (LGT)); providing via a first interface (FI) CM(s) as a first differential cell data signal (FDCDS) (wherein FI comprises differential terminals (DTs); providing FDCDS at a first winding (FW) of a first transformer (FT) connected to FI; establishing a coupling between GP and each terminal of FW via a bypass capacitor (BC) disposed between a DT and LGT; and referencing a center tap (CT) located between FT's winding terminals to LGT to establish a low-impedance coupling between CT and LGT, and isolate DC potential at LGT from DC potential of DTs. The low-impedance coupling is such that it reduces parasitic voltage drop at CT caused by high-frequency common-mode noise current due to noise signal transferred via parasitic capacitive coupling between FT's windings.

Systems, methods and software products comprising: providing cell measurement signals (CMs) associated with electrical energy storage component stack (CMs are referenced to ground potential (GP) at a local ground terminal (LGT)); providing via a first interface (FI) CM(s) as a first differential cell data signal (FDCDS) (wherein FI comprises differential terminals (DTs); providing FDCDS at a first winding (FW) of a first transformer (FT) connected to FI; establishing a coupling between GP and each terminal of FW via a bypass capacitor (BC) disposed between a DT and LGT; and referencing a center tap (CT) located between FT's winding terminals to LGT to establish a low-impedance coupling between CT and LGT, and isolate DC potential at LGT from DC potential of DTs. The low-impedance coupling is such that it reduces parasitic voltage drop at CT caused by high-frequency common-mode noise current due to noise signal transferred via parasitic capacitive coupling between FT's windings.

The invention discloses a method for measuring a crack growth rate and a threshold value at an extremely high temperature. Firstly, a test sample and a clamp are manufactured; then a high-temperature furnace is installed, a test sample and a thermocouple are installed, the test sample, a reference sample and a potential measurement system are connected through a high-temperature-resistant wire, and the reference sample is arranged outside the high-temperature furnace; the temperature of the high-temperature furnace is raised to 1000-1200 DEG C, heat preservation is conducted, and meanwhile water cooling is conducted to the cooling connecting rod; the low-cycle fatigue testing machine starts to load and test the crack of the sample through a potential measurement system; a K-drop method is adopted for testing, a potential measurement system monitors crack propagation in real time through a direct-current potential method, the test is ended when the crack propagation rate reaches 1 * 10 <-mm > / cycle, and a fatigue crack propagation threshold value is obtained through data processing. According to the invention, the problems of current conduction stability, load transmission accuracy and crack length measurement accuracy in the environment of 1000-1200 DEG C are solved.

Curable and cured compositions as well as articles containing the curable or cured compositions are provided. The cured compositions are typically a semi-structural or structural adhesive. Advantageously, the cured compositions can be removed (e.g., de-bonded) from the various surfaces of the articles after the useful lifetime of the articles, to correct misplacement of a part during manufacturing, or to repair the electronic device. The separation step occurs using a direct current electric potential across the cured composition.

A method for assessing a structure arranged in an electrolyte includes connecting an electric source between the structure and a low resistive connection to the electrolyte via an earth, providing a direct and / or alternating current via the source, measuring a direct and an alternating voltage between a first and second electrode, the electrodes being in contact with the electrolyte at a measurement location and being arranged at a distance to each other. The first and second electrodes are connected to a voltage measurement device. A direct potential and an alternating potential is determined between the structure and the electrolyte at the measurement location, which may include measuring the DC potential and the AC potential between the structure and at least one additional electrode in contact with the electrolyte. A property of the structure may be assessed based on the measured DC and AC voltages, and the DC and AC potentials.

Curable and cured compositions as well as articles containing the curable or cured compositions are provided. The cured compositions are typically a semi-structural or structural adhesive. Advantageously, the cured compositions can be removed (e.g., de-bonded) from the various surfaces of the articles after the useful lifetime of the articles, to correct misplacement of a part during manufacturing, or to repair the electronic device. The separation step occurs using a direct current electric potential across the cured composition.

A sub-module comprising direct and alternating voltage terminals and an arrangement comprising the sub-module are presented herein, the sub-module comprising: a switching device comprising a substrate having first and second direct voltage conductor tracks having first and second direct voltage connection areas arranged thereon, wherein the direct voltage connection areas are preferably arranged directly adjacent to each other, and the substrate further comprises an alternating voltage conductor track and an alternating voltage connection area thereon; and the switching device comprises a plurality of power semiconductor components; and the switching device comprises an internal connection device, wherein the first and second direct voltage connection areas and also the alternating voltage connection area are configured and arranged to be directly, polarity-correctly and electrically conductively connected to external direct and alternating voltage connection elements not associated with the sub-module by clamping means, whereby the substrate is simultaneously pressed onto a support device in the section of the direct voltage connection areas and also the alternating voltage connection area.

The present invention relates to the technical field of natural gas pipeline protection, and more specifically, to a collector for cathodic protection of natural gas pipelines, comprising a pile body, a solar panel fixedly mounted on the top of the pile body, an equipment cavity defined within the pile body, a collector mounted within the equipment cavity, the collector electrically connected to an insulated wiring board, the input end of the insulated wiring board being connected to a polarization probe via an integrated wire assembly, the input end of the insulated wiring board also being connected to a pipeline cable, the other end of the pipeline cable being connected to the pipeline. A cathodic protection circuit, comprised of an AC potential test circuit, a DC potential test circuit, and a relay group circuit, is capable of measuring the AC interference voltage around the pipeline and the DC potential difference between the pipeline and a reference electrode, thereby providing comprehensive monitoring capabilities for the pipeline's cathodic protection status. Integrated signal processing algorithms and resistivity compensation algorithms improve the accuracy of collected data, thereby better reflecting the pipeline's true condition.

There is provided a plasma processing apparatus comprising: a plasma processing chamber; a substrate support disposed in the plasma processing chamber; a lower electrode disposed in the substrate support; a conductive member disposed above the substrate support, the conductive member having at least one coolant inlet and at least one coolant outlet, the conductive member being connected to an RF potential or a DC potential; and an upper electrode assembly including: a conductive plate detachably connected to a bottom surface of the conductive member, the conductive plate having one or more coolant channels communicating with the at least one coolant inlet and the at least one coolant outlet; an electrode plate disposed below the conductive plate; and a conductive bonding sheet disposed between the electrode plate and the conductive plate.

A device for trapping charged atomic objects includes: a substrate having a first major surface; at least one radio frequency (RF) electrode configured to generate an RF potential for trapping at least one ion along a trap axis, the at least one RF electrode including a plurality of RF segments arranged on the first major surface of the substrate, the plurality of RF segments being at least partly separated on the first major surface of the substrate; and a plurality of direct current (DC) electrodes configured to generate a DC potential.

The application relates to a method for operating an inverter configured to exchange power between a DC side and an AC side. The inverter includes a bridge circuit and a divided intermediate circuit with at least two partial capacitances, arranged between the DC side and the bridge circuit. The method includes producing a first asymmetry of the partial capacitances relative to one another for generating a first potential position of DC potentials of the partial capacitances of the intermediate circuit relative to ground potential, setting the first potential position of the DC potentials of the partial capacitances of the intermediate circuit to a first setpoint value by varying the asymmetry, the first setpoint value being constant for a first period of time or modulated at a frequency which is at least 100 times lower than an AC frequency of the exchange power.

The present invention relates to a new device for selective arsenic sensing using electrochemically reduced graphene oxide (ERGO) based reusable flexible electrode strip. Active electrode of the device was prepared by a very simple method in which the thin film of graphene oxide (GO) was reduced electrochemically at a low DC potential (0 to −1.5 V). The said device selectively detects As3+ in field water sample within a wide range of concentrations with a limit of detection of less than 25 ppb. More importantly, the selectivity of the electrode is independent of conductivity and TDS levels of measured field water samples which were collected from various parts of India. Selective detection of As3+ by ERGO was controlled by optimizing the surface electronic conductivity through structural modification of it during electroreduction process.

Systems, methods and software products comprising: providing cell measurement signals (CMs) associated with electrical energy storage component stack (CMs are referenced to ground potential (GP) at a local ground terminal (LGT)); providing via a first interface (FI) CM(s) as a first differential cell data signal (FDCDS) (wherein FI comprises differential terminals (DTs); providing FDCDS at a first winding (FW) of a first transformer (FT) connected to FI; establishing a coupling between GP and each terminal of FW via a bypass capacitor (BC) disposed between a DT and LGT; and referencing a center tap (CT) located between FT's winding terminals to LGT to establish a low-impedance coupling between CT and LGT, and isolate DC potential at LGT from DC potential of DTs. The low-impedance coupling is such that it reduces parasitic voltage drop at CT caused by high-frequency common-mode noise current due to noise signal transferred via parasitic capacitive coupling between FT's windings.

A mass filter comprises a plurality of mass filter electrodes (26a, 26b) for mass filter of ions passing therethrough, where at least a first of the electrodes (26a) comprises a first gap (34) therethrough. The voltage source is arranged and configured to apply a voltage to the mass filter electrode (26a, 26b) such that ions having a mass-to-charge ratio within the mass transfer window are constrained by the electrode and transferred through the mass filter, while at least some ions having a mass-to-charge ratio outside the mass transfer window are unstable and pass through the first gap (34) such that they are filtered by the mass filter. A first collector electrode (36) is arranged to receive ions transmitted through the first gap (34), and a voltage source applies a DC potential difference between the first filter electrode and the first collector electrode so as to urge ions transmitted through the first gap onto the first collector electrode.

A power electronic system including a plurality of power components and a plurality of electrically-conductive heatsinks, each of said power components being disposed between two electrically-conductive heatsinks of the plurality of electrically-conductive heatsinks, at least one electrically-conductive heatsink being configured to be polarised according to a phase potential, called phase heatsink, at least one electrically-conductive heatsink being configured to be polarised according to a +DC potential, called cathode heatsink, and at least one electrically-conductive heatsink configured to be polarised according to a −DC potential, called anode heatsink, the system further includes at least one external phase connection, and at least one external +DC connection, and at least one external −DC connection respectively connected to the phase heatsink, to the cathode heatsink and to the anode heatsink.

A pixel including a first node, a second node configured to receive a first DC potential, and a plurality of acquisition channels each including: a photodiode adapted to detect radiation in a first wavelength range; a capacitive element coupling the photodiode to the first node; and a resistive element coupling a first terminal of the photodiode to the second node.

An electrostatic lens for transporting charged particles in an axial direction includes a first group of first electrodes configured to receive a first DC potential from a DC voltage source, and a second group of second electrodes configured to receive a second DC potential from the DC voltage source different from the first DC potential. The first electrodes are interdigitated with the second electrodes. The first group and / or the second group has a geometric feature that progressively varies along the axial direction. The lens generates an axial potential profile that progressively changes along the axial direction, and thereby reduces geometrical aberrations. The lens may be part of a charged particle processing apparatus such as, for example, a mass spectrometer or an electron microscope.

The invention discloses a laser electrolysis coupling polarization characteristic and EIS measurement method and device, and the device comprises an electrolytic tank which is made of a polytetrafluoroethylene material and is internally provided with a working electrode, a counter electrode and a reference electrode; the laser system comprises a laser generator, a light path transmission system and a focusing device, and the focusing device is located above the electrolytic tank and irradiates the surface of the working electrode; the electrochemical measurement system is connected with the working electrode, the counter electrode and the reference electrode through wires, and is used for applying sine alternating-current voltage disturbance signals and direct-current potential disturbance signals and collecting current response; the temperature control system comprises a heating element, a refrigerating element and a temperature sensor inserted into the electrolyte and is used for maintaining the electrolyte at a constant temperature; and the stirring system comprises a magnetic stirrer arranged below the electrolytic tank and a stirrer in the electrolyte. According to the invention, independent stripping analysis of the laser action is realized, and the processing quality and efficiency are improved.

A sensor device comprising an LC oscillation circuit (150) containing a coil (108) in which an inductance changes according to a displacement amount of an object (200) and a DC resistance changes according to a temperature, and an oscillation unit (132) containing an LC resonant capacitor (134) electrically connected to the coil;and a switching unit (138) comprising a switch (SW) which switches to electrically connect one end (N20) of the coil to a predetermined DC potential, wherein, when the switch is off, the LC oscillation circuit is in a first state in which an oscillation signal (Iout) is output, the frequency of which changes according to the displacement amount of the object, and when the switch is on, the LC oscillation circuit stops the oscillation and is in a second state in which a DC voltage (Vtemp), the voltage value of which changes according to the temperature of the coil, is output from a common connection point (N1) between a predetermined resistor (R24), which is a component of the oscillation unit, and the other end (N30) of the coil (108).

The invention relates to a method for operating a converter device (10) in a vehicle for converting a direct current (DC) voltage into an alternating current (AC) voltage, wherein the DC potentials (DC-,DC+) and AC potentials (AC1,AC2) are electrically isolated from the chassis potential (GND) of the vehicle and the converter device (10) is configured to generate the AC potentials (AC1,AC2) according to the respective target potential values ​​relative to the DC potentials (DC-,DC+).The procedure comprises: (a) determining the potential position of the DC voltage potentials (DC-, DC+) with respect to the chassis potential (GND) and, based on this, determining a first reference potential value, (b) determining a second reference potential value by adding a time-varying test signal to the first reference potential value, (c) determining third reference potential values ​​by adding different phase signals to the second reference potential value, where a difference between the phase signals corresponds to the AC voltage (UAC), (d) generating the AC voltage potentials (AC1, AC2) with the third reference potential values ​​as the target potential values, (e) causing an alternating change in the potential position of the DC voltage potentials (DC-, DC+), and (f) recording and evaluating the time course of this potential position in order to assess AC-side electrical insulation.