47 results about "Partial current" patented technology

The present invention discloses a nano copper-based catalyst, its preparation method, and its application in the electrocatalytic reduction of carbon dioxide and carbon monoxide. Copper chloride (or copper nitrate, copper acetate) is dissolved in ultrapure water, and a sodium borohydride solution is added dropwise. Stir at room temperature for 5-60 min, filter, and dry to obtain a nano copper catalyst. Further, through a displacement reaction, nano copper-palladium and copper-silver catalysts are obtained. The present invention is applied to the electrocatalytic reduction of carbon monoxide. In a membrane electrode assembly (MEA) electrolyzer, the Faraday efficiency of multi-carbon products (C2+) reaches up to 95%, the partial current density reaches up to 3 A cm-2, and the overall electrolyzer energy efficiency reaches up to 39%. It can stably electrolyze for 30 hours at 1 A cm-2. This nano copper catalyst is applied to the electrocatalytic reduction of carbon dioxide. In an MEA electrolyzer, the Faraday efficiency of C2+ reaches up to 66%, and the partial current density reaches up to 331 mA cm-2.

The present embodiments relate to an electric current sensor, a steering control device, and a method for detecting an electric current. An electric current sensor may comprise: a conductive part through which an electric current flows; a detection unit for detecting a magnetic field generated by the electric current flowing through the conductive part; a first generation unit for generating a first electric current sensing value on the basis of the resistance included in the conductive part; and a second generation unit for generating a second electric current sensing value on the basis of the magnetic field detected through the detection unit.

A control system includes a controller that is configured to determine a differential current of a heater based on a difference between a power conductor current of the heater and a neutral conductor current of the heater, determine whether the differential current of the heater is greater than a threshold differential current, and selectively perform a corrective action in response to the differential current being greater than the threshold differential current.

The invention discloses a multi-cavity carbon nanorod packaged bismuth oxide catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: constructing a composite micelle containing metal ions by using a dual-surfactant P123 and sodium oleate, co-assembling the composite micelle with a melamine oligomer generated based on a Schiff base reaction, and carbonizing and reducing to obtain the nitrogen-doped carbon nanorod loaded bismuth oxide nanoparticle catalyst with a chamber structure. The prepared catalyst has excellent catalytic performance and stability when applied to preparation of formic acid through reduction of carbon dioxide under electro-catalysis, the highest Faraday efficiency of formic acid under the potential of-1.3 V vs.RHE is 96%, and the partial current density of formic acid can reach 34.8 mA cm <-2 >. In the catalysis process of 42 h, the Faraday efficiency of formic acid can be kept at 86% or above, and the method has good application prospects.

The invention discloses a system and method for relieving alternating current and direct current stray current interference of a buried metal pipeline, and relates to the technical field of metal pipeline current corrosion and protection, and the system is composed of a reference electrode (CSE), a test piece (Coupon), a switch K1, a switch K2, a pipeline (Pipe), a capacitor (c), a diode (D), a variable resistor (R), a power supply (PW) and a grounding electrode (G). The alternating stray current flows to the ground from the capacitor, so that the influence of the interference of the alternating stray current on the pipeline is reduced; the direct-current stray electricity flows to the ground through the diode, a part of the current flowing to the ground flows to the pipeline from the defect position of the anti-corrosion layer of the pipeline through soil, the part of the current can exert cathode protection on the pipeline, and then the effect of inhibiting corrosion of the pipeline is achieved. The cathode protection potential is in a reasonable range, and the corrosion inhibition effect on the pipeline is better achieved.

This invention discloses a method and system for obtaining the evolution of the space electric field in a self-sustaining neutron detector (SPND) insulating layer and calculating detector sensitivity, belonging to the field of neutron detection technology. The method includes: establishing a dynamic equation for charge density evolution; decomposing the total irradiation current density into a stable and time-varying component, and simulating the stable and time-varying current density distributions contributed by a single source particle under decay equilibrium conditions using the Monte Carlo method; obtaining an expression for the time-varying current density of the SPND, solving the dynamic equation for charge density evolution, and obtaining an analytical expression for charge density evolution; and based on the charge density distribution, obtaining the electric field intensity distribution through integration, and simulating the detector sensitivity. This method directly reveals the influence of detector parameters and neutron flux on the space electric field and its evolution, solving the problems of large computational load and long processing time in existing technologies, significantly improving computational efficiency, and thus achieving efficient simulation of the sensitivity of a self-sustaining neutron detector.

A test piece 14 and a counter electrode 13 having a shape conforming to the shape of a film formation surface 14A of the test piece 14 are arranged close to each other, and a film of a conductive polymer is formed on the test piece 14 by electrolytic polymerization. The method involves preliminarily obtaining conditions of the voltage and integrated current value under which a desired film thickness is obtained by electrolytic polymerization, and conducting electrolytic polymerization until the integrated value of current flowing between the counter electrode 13 and the test piece 14 reaches the integrated current value, while keeping a constant voltage between the counter electrode 13 and the test piece 14.

The application discloses a high-performance porous hydrogen bond network catalyst for CO2 reduction in an acidic medium to prepare multi-carbon products and a preparation method thereof, and relates to the technical fields of electrocatalysis and carbon neutralization. The catalyst is a composite material of a fluorine-modified hydrogen bond organic framework loaded with copper active centers, which is obtained by the reaction of N,N',N'-tetra-(p-aminophenyl)-p-phenylenediamine and 2-fluorobenzoyl chloride to obtain a fluorine-modified hydrogen bond organic framework MTHOF-2-F, and then adsorbing copper ions through a wet impregnation method and obtaining MTHOF-2-F@Cu after low-temperature activation. The catalyst catalyzes CO2 reduction to generate organic products containing two or more carbon atoms in an acidic electrolyte. Experimental results show that in an acidic medium with pH=1.5, the product faraday efficiency of the catalyst reaches more than 75%, the partial current density reaches 619.5 mA·cm-2, and the C2 / C1 ratio reaches 9.71. 2+ Product faraday efficiency reaches more than 75%, C 2+ Partial current density reaches 619.5 mA·cm ‑2 C2 / C1 ratio reaches 9.71.

This invention discloses a biphase copper foam electrode for the electrocatalytic reduction of nitrate to ammonia in a membrane electrode system, its preparation method, and its application. The electrode preparation method includes: ultrasonically cleaning the copper foam in ethanol, calcining it in a muffle furnace, and then performing in-situ reduction in a membrane electrode electrolysis cell to form an amorphous / crystalline biphase copper electrode. In performance testing of the electrocatalytic reduction of nitrate to ammonia in a membrane electrode system, this self-supporting amorphous / crystalline biphase copper electrode exhibits excellent performance, with a maximum ammonia Faradaic efficiency of 92% and a maximum ammonia partial current density of 3.5 A cm⁻¹. ‑2 The full-cell energy efficiency reaches up to 26%, and it can operate at 1.5A cm⁻¹. ‑2 The amorphous / crystalline biphase copper electrode and the corresponding membrane electrode testing process prepared in this invention significantly improve the reaction activity and stability, providing an important research foundation for promoting the industrial application of nitrate electrocatalytic reduction to ammonia.

The utility model discloses an offshore wind power cathode protection device, which relates to the technical field of offshore wind power equipment and comprises a protection shell, a mounting bottom shell is arranged on the lower side of the protection shell, a plurality of mounting through grooves are uniformly formed in the mounting bottom shell, and wind power cathodes are assembled on the upper side of the mounting bottom shell through the mounting through grooves. Quick-release side covers are arranged on the left and right sides of the protective shell and located between the protective shell and the lower mounting bottom shell, and rotating rods are rotationally connected to the left and right sides of the inner sides of the quick-release side covers. A distributed anode arrangement mode is adopted, current is effectively dispersed, electric field distribution is balanced, corrosion caused by over-dense local current is prevented, the electric field distribution is optimized by adjusting the distance between the anode and the cathode, the protection range is expanded, the effect is improved, the device adopts the design of the quick-release side cover and the rotating rod, the installation and maintenance process is simplified, and the cost is reduced. And rapid maintenance in an offshore wind power environment is facilitated, so that the service life of equipment is prolonged, the maintenance cost is reduced, and the reliability and stability of an offshore wind power system are improved.

The embodiments provide an electrode catalyst layer for an electrolysis cell, and also an electrolysis cell and a carbon dioxide electrolysis apparatus comprising that layer. The catalyst layer has a controlled porous structure, and can realize a high partial current density. The catalyst layer of the embodiment comprises carbonous catalyst carriers, a metallic catalyst loaded on the carriers, and an ion-conductive material. The catalyst layer contains pores of 5 to 200 μm diameters, and the pores have a volume per weight of the catalyst layer in the range of 3.0 to 10 mL / g in total.

A current detection device detects an electric current. The current detection device includes a first conducting portion, a second conducting portion, and a current sensor. An electric current flows through the first conducting portion in a specific direction. The second conducting portion is provided at a position separated from the first conducting portion in the specific direction and through which an electric current flows in the specific direction. The current sensor detects an electric current flowing through the first conducting portion. The current sensor is located at a position aligned with the first conducting portion in an orthogonal direction orthogonal to the specific direction and separated from the second conducting portion in the specific direction. The current sensor includes a sensor element which detects a magnetic flux generated by the electric current flowing through the first conducting portion and an element protector which protects the sensor element.

The present invention relates to a method for calculating inductance, specifically a method for rapidly calculating the inductance of a superconducting coil that considers current distribution in the width direction. The method comprises the following steps: S1: Target object confirmation: Establishing a spatial coordinate system for the superconducting coil and determining the path function of the superconducting coil; S2: Current element division: Dividing the current elements based on the geometric dimensions of the strip and coil; S3: Numerical integration: Combining the Neumann formula and the geometric mean distance principle, first calculating the geometric mean distance between the current elements, taking into account the influence of width, then calculating the self-inductance and mutual inductance of each divided current element, and then superimposing and summing the results to obtain the calculated inductance value of the target superconducting coil. Compared with the prior art, the present invention addresses the drawback of the prior art of extremely large computational complexity when considering current distribution in the width direction. This solution simplifies the calculation process of the superconducting coil inductance while ensuring calculation accuracy.

Systems, methods, and apparatus are provided for electrically shielding a heated component, more specifically, in a manner compatible with a circuit protected by a GFCI (Ground Fault Circuit Interrupter). An example is a heated component that is electrically shielded, comprising: a conductor which is a heating element connected between a power line and the neutral line of the circuit from a GFCI; and a shield adjacent to the conductor and connected to the GFCI, the shield receiving a portion of the current from the conductor and returning a portion of the received current to the GFCI.

An example apparatus for monitoring contamination on a discharge electrode (3, 4, 5, 6, 7, 8), the apparatus having at least one emission peak (32) for non-contact discharge of a charged surface, comprising: a ground terminal (21) connected or connectable to the discharge electrode (3, 4, 5, 6, 7, 8); and a control device (27) configured to: detect a partial current coupled from the at least one emission peak to ground; determining an active power on the basis of the partial currents (I1 (t), i2 (t), i3 (t)); and generating a state signal based on the calculated active power (i1 (t), i2 (t), i3 (t)).

To achieve good diode characteristics.SOLUTION: A semiconductor device includes a semiconductor substrate, a bottom electrode and a gate electrode. The semiconductor substrate has a p-type collector region, an n-type cathode region and an n-type specific region which are arranged between a buffer region and the bottom face of the semiconductor substrate. The semiconductor device includes a transistor part and a diode part. Current flows in the transistor part depending on gate voltage. Current flows in the diode part depending on forward bias voltage. The collector region is arranged in at least a part of the transistor part and at least a part of the collector region is exposed from the bottom face of the semiconductor substrate. The cathode region is arranged in at least a part of the diode part and is exposed from the bottom face of the semiconductor substrate. The specific region is arranged in at least a part of the diode part and is also arranged between the cathode region and the buffer region. A p-type impurity concentration in the specific region is lower than a p-type impurity concentration in the collector region.SELECTED DRAWING: Figure 1

The invention discloses a catalytic electrode material and a preparation method and application thereof, the catalytic electrode material comprises a catalytic electrode base material and a copper nanosheet loaded on the surface of the catalytic electrode base material, and the catalytic electrode base material is selected from a porous copper base material; the catalytic electrode material can be applied to ammonia production through electro-catalysis of nitrate and / or nitrite reduction, or removal of nitrate and / or nitrite in waste water is achieved through electro-catalysis of nitrate and / or nitrite reduction, the copper nanosheets grow on the surface of the porous copper base material in a loaded mode, enough active sites can be exposed, high grain boundary density is achieved, and the catalytic electrode material can be applied to ammonia production through electro-catalysis of nitrate and / or nitrite reduction. The activity of catalyzing electrochemical reduction of nitrate and / or nitrite can be improved, the NH3 Faraday efficiency and the partial current density are improved, and then the ammonia yield or the removal efficiency of nitrate and nitrite can be improved.

The embodiments provide a method to produce an electrode catalyst layer for reduction of carbon dioxide. The catalyst layer is made to exhibit high partial current density and to endure a long-term operation by controlling the wettability. The catalyst layer comprises a metallic catalyst supported on carbon material, an ion-conductive material, and a hydrophilic polymer; and is characterized in that a BET specific surface area (AN2) of said catalyst layer determined by nitrogen gas-adsorption and a BET specific surface area (AH2O) of said catalyst layer determined by water vapor-adsorption are in a ratio (AH2O / AN2) of 0.08 or less.

The invention relates to a preparation method and application of a bismuth trioxide anchored metal-organic framework catalyst, belongs to the field of electrode materials for catalyzing reduction of carbon dioxide, and particularly relates to a method for constructing an MOF confined Bi catalyst through a subject-object synthesis strategy by using a metal-organic framework material (MOF: PCN-222) with a clear structure and coordination as a carrier. And high-activity and high-stability electrocatalytic CO2 reduction is realized. According to the present invention, the reaction activity of the catalyst added with different Bi (NO3) 3.5 H2O ratios is compared through the electrochemical test, the final product Bi2O3 (at) PCN-222-2 sample has the optimal performance, the HCOOH Faraday efficiency can achieve 89.42% in the carbon dioxide saturated 0.005 M H2SO4 solution and the 0.5 M K2SO4 solution at the-1.8 V vs.RHE potential, and the HCOOH partial current density can achieve-268.7 mA cm <-2 >. The Bi2O3-coated PCN-222-2 catalyst material prepared by the method has an extremely high industrial application prospect in electroreduction of carbon dioxide, and can be widely applied to the field of electroreduction of carbon dioxide electrochemical energy storage devices.

The application discloses a kind of multi-modal fracture closed-loop rehabilitation methods and systems for nerve remodeling, comprising: collecting the multi-modal data when executing rehabilitation gait action under the action of phase-specific electrical stimulation, at least including electroencephalogram signal, near-infrared blood oxygen signal, electromyogram signal, joint angular velocity signal and foot sole pressure signal;After the multi-modal physiological parameter data is preprocessed, fusion analysis is carried out, specifically, the motion intention and concentration state evaluation score and the first partial current are estimated, the action category and completion degree score are estimated, the second partial current is output based on the phase-specific site scheme, the total current is set with the action category and completion degree score as weight and combined with the first partial current and the second partial current, and the specific treatment electrode site and electrical stimulation treatment parameter are comprehensively output and fed back to control corresponding electrode to apply phase-specific distributed electrical stimulation. Thus multi-modal information fusion evaluation and on-demand auxiliary regulation can be realized, nerve remodeling is effectively promoted and rehabilitation training effect is improved.

The embodiment of the utility model provides a current acquisition circuit and a current measurement circuit, and relates to the technical field of current measurement, a micro-control unit adjusts the current amplification factor of the current acquisition circuit by adjusting the use state of each control module according to the initial output current output by the current acquisition circuit, so that the current measurement precision is improved. According to the method, the internal currents of the external devices with different sizes are amplified into the output currents larger than the preset threshold value, and then the current information of the internal currents is obtained according to the output currents so as to measure the internal currents of the external devices. The internal currents with different magnitudes are amplified into the output currents larger than the preset threshold value for processing, and the current values of the currents are negatively correlated with the measurement errors of the currents, so that the measurement errors of the internal currents with different magnitudes are all smaller than the error threshold value corresponding to the preset threshold value; compared with the prior art in which the measurement error of the partial current is greater than the error threshold, the measurement accuracy is improved.

The invention relates to a sensor for determining an electrical differential current, comprising a magnetic field-sensitive component, a first main winding and a test winding, the sensor being configured such that a periodic current or a periodic voltage at a frequency of at least 10 kHz can be applied to the first main winding. The invention also relates to a sensor assembly, a circuit breaker, a charging cable and a charging station, each having such a sensor, and to a method for operating a sensor, a sensor assembly or a circuit breaker.

Embodiments herein relate to a high-impedance current-sensing circuit. In one approach, the circuit includes first and second amplifiers which are coupled to first and second sense nodes, respectively, of a load to be monitored, one or more current mirrors to mirror a current to a voltage output node, and first and second resistors coupled to an input and output, respectively, of the one or more current mirrors. A voltage at the voltage output node is based on a current between the first and second sense nodes, and can be used for various purposes such as limiting the current through the load.

A current collector for an electrode having a fuse-integrated uncoated part according to an embodiment of the present invention may comprise: an electrode plate made of a metal material on which an electrode active material is applied or coated; and an uncoated part which is formed at one end of the electrode plate and in which the electrode active material does not exist, wherein the uncoated part includes a current path part having a width direction length narrower or shorter than the other parts and a cut part formed on one side of the current path part so that the uncoated part does not exist therein, and a reinforcement part provided to cover at least one of the current path part and the cut part or provided not to cover all or a part of the current path part is attached to at least one surface of both surfaces of the uncoated part.

The application relates to the technical field of semiconductors, in particular to a double-layer quantum well structure for differential detection and a preparation method. The double-layer quantum well structure comprises, from top to bottom, a top contact layer, a first quantum well region, an intermediate contact layer, a second quantum well region and a bottom contact layer; and a top electrode, an intermediate electrode and a bottom electrode arranged on the top contact layer, the intermediate contact layer and the bottom contact layer respectively. Thus, a three-terminal device structure is formed, in which the two quantum well regions share the same intermediate electrode. Under the structure, when the two quantum well regions generate photoelectric current under light, the intermediate electrode can simultaneously obtain the current signals of the two quantum well regions, and by configuring the voltage applied on different electrodes, the intermediate electrode can output differential current, thereby providing a hardware basis for realizing differential detection.

A phase-adjustable annular voltage-controlled oscillator based on resistance feedforward comprises four differential current starvation type delay units which are identical in structure and connected in a loop mode, the positive output end and the negative output end of the first differential current starvation type delay unit are connected with the negative input end and the positive input end of the second differential current starvation type delay unit respectively, and the first differential current starvation type delay unit is connected with the second differential current starvation type delay unit. The positive and negative output ends of the second, third and fourth differential current starvation type delay units are respectively connected with the positive and negative input ends of the third, fourth and first differential current starvation type delay units to form a main path loop; the positive and negative output ends of the first and fourth differential current starvation type delay units are respectively connected with the positive and negative feed-forward ends of the third and second relative differential current starvation type delay units; the positive and negative output ends of the second and third differential current starvation type delay units are respectively connected with the negative and positive feed-forward ends of the fourth and first relative differential current starvation type delay units to form a feed-forward path loop; and each differential current starvation type delay unit is additionally provided with bias voltage ends of a PMOS (P-channel Metal Oxide Semiconductor) transistor and an NMOS (N-channel Metal Oxide Semiconductor) transistor. According to the invention, through the resistor feed-forward structure, the output frequency of the oscillator is integrally improved, the resistance value of the feed-forward resistor is adjusted through the control word, a GHz-level clock signal is output, and the oscillator has a relatively wide frequency adjustment range, can be used for initial deflection calibration of phase mismatch among multiple channels in a multi-phase clock application scene, and is beneficial to reducing the calibration cost.

An exemplary disclosed apparatus for monitoring contamination on discharge electrodes 3, 4, 5, 6, 7, 8 having at least one emission tip 32 useful for contactless discharge of an electrically charged surface includes a ground terminal 21 connected or connectable to the discharge electrode 3, 4, 5, 6, 7, 8, and a control device 27 configured to detect partial currents coupled from the at least one emission tip to the ground terminal, determine active powers based on the partial currents i1(t), i2(t), i3(t), and generate a status signal based on the calculated active powers i1(t), i2(t), i3(t).

This invention discloses a class of rare-earth tin-based pyrochlore metal oxides, their preparation methods, and applications, belonging to the field of electrocatalyst technology. Addressing the limitations of traditional tin-based catalysts in the intrinsic activity, low current density, and low selectivity of the electrocatalytic reduction of carbon dioxide to formate, this invention provides a class of rare-earth tin-based pyrochlore metal oxides with the general structural formula A₂B₂O₇, where A is selected from a rare-earth metal ion and B is selected from Sn ions. This invention anchors the Sn active component into the rare-earth pyrochlore lattice via a one-step hydrothermal method, utilizing the A-O-Sn electronic synergistic effect between rare-earth elements and Sn to achieve precise control of the electronic structure and coordination environment of the Sn site, optimizing the key intermediate *OCHO, thereby significantly improving selectivity and split current. The preparation method of the rare-earth tin-based pyrochlore metal oxides in this invention is simple to operate, easy to mass-produce, exhibits excellent CO₂ electroreduction performance, and has good prospects for industrial application.

The invention belongs to the technical field of online current measurement, and provides a noise-reduction magnetism-gathering differential current measuring device and method.The device comprises a magnetic sensing type chip A, a magnetic sensing type chip B and a symmetrical magnetism-gathering ring, and the symmetrical magnetism-gathering ring is of a symmetrical double-open air gap structure; and the magnetic sensitive chip A and the magnetic sensitive chip B are respectively fixed at the air gaps at the two ends of the diameter of the symmetrical magnetism gathering ring. The invention provides a high-efficiency noise-reduction magnetism-gathering differential current measurement method, which adopts a reverse magnetic field differential framework and realizes high-efficiency noise suppression through a differential signal processing circuit. And a shunt branch is added on the iron core, so that a part of exciting current can be converted into secondary current. The reduction of the excitation current results in an expansion of the measurement current range.

An electric circuit includes a power source unit, and a main circuit unit configured to receive electric power from a power source via the power source unit. The power source unit includes a bypass path and an impedance increasing circuit. The bypass path allows part of a current including a lightning surge current superimposed on a current from the power source to flow. The impedance increasing circuit increases an equivalent impedance between the power source and the main circuit unit based on the current flowing through the bypass path.