17 results about "Partial current" patented technology

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.

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.

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)).

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 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 utility model discloses an X-ray vertical channel field effect transistor detector, which comprises an X-ray sensing part, a current modulation part and a charge coupling induction part, the X-ray sensing part is composed of a high-atomic-number semiconductor crystal and a corresponding semiconductor structure, absorbs high-energy X-rays and generates electron / hole pairs; the current modulation part is composed of a porous source electrode, a semiconductor channel and a drain electrode; the charge coupling induction part is composed of a gate electrode, a dielectric layer and a porous source electrode. The dielectric layer is over the X-ray sensing layer. According to the utility model, the photocurrent is amplified by utilizing the gain of the field effect transistor, so that high-sensitivity X-ray detection is obtained; the X-ray sensing layer is arranged between the grid electrode and the dielectric layer, dark current is blocked through the dielectric layer, an incident X-ray signal is transmitted to light current through charge coupling induction, and low-noise X-ray detection is achieved.

This invention discloses a new energy prefabricated substation with a protection unit for use in substations. By installing a protection unit inside the insulating base, the insulation performance of the insulating base can be actively monitored, solving the problem in existing technologies where it is difficult to detect the deterioration of the insulating base's performance in a timely manner, leading to significant safety hazards. With the installation of heat transfer columns and their internal re-grounding units, when the insulating base has good insulation performance, heat can be conducted downwards, reducing the accumulation of heat on the insulating base and effectively slowing down the rate of insulation performance degradation. At the same time, the insulation performance of the insulating base can be effectively monitored. When its insulation deteriorates and its relative leakage current is high, the selective conductive pin can be connected to conduct this portion of the current directly to the ground, re-grounding the substation and effectively preventing excessive current accumulation inside the insulating base, thereby significantly reducing safety hazards.

The invention discloses an electrochemically reconstructed bismuth-based nano-catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst comprises a substrate and a Bi nanosheet arranged on the substrate, wherein the Bi nanosheet is generated by loading a Bi2O3-x nanosheet precursor prepared by a solvothermal-calcination method on the substrate through electrochemical reconstruction. Compared with the prior art, the method has the advantages that a precursor Bi2O3-x nanosheet is reduced into a metal state Bi nanosheet through an electrochemical reconstruction method, and the crystalline phase of metal Bi is kept unchanged when the metal state Bi nanosheet is electrically reduced in an acid solution. The Faraday efficiency and partial current density of the catalyst in the reaction of preparing glycollic acid by electrocatalytic oxalic acid reduction are improved, namely, the catalyst has high selectivity and reaction activity.

A pre-treatment-based planned power-off cathode zinc redissolution inhibition method is provided. Before power-off, a synergistic pre-treatment process of acid-zinc ratio regulation and optimization of electrolyte composition, step regulation and reduction of current density, and tank temperature control to strengthen interface stability is adopted, so that a protection layer against redissolution is formed on the cathode zinc during planned power-off, thereby inhibiting the redissolution of the cathode zinc. The present application performs directional pre-adjustment on the key parameters of the conventional wet zinc refining electrodeposition process before power-off, optimizes the electrolyte composition, step regulation of current density, and strengthens the interface stability of the electrolytic tank, so that the cathode zinc maintains an electrochemically inert state during power-off without adding equipment or changing the basic process flow. The present application achieves a technical effect of redissolution rate ≤ 5%, significantly reduces the dissolution loss of zinc during planned power-off, improves the metal recovery rate, and ensures the continuity of production, and is especially suitable for mineral areas with weak infrastructure.

The present invention relates to an improved electric heating device (10) for heating a liquid medium, comprising a first heating chamber (100) and a second heating chamber (200) and an electric heating element (30) which is provided between the first heating chamber (100) and the second heating chamber (200) and is thermally coupled to the first heating chamber (100) and the second heating chamber (200), and with an inlet (11) and a distributor (40) downstream of the medium in the direction of flow, which divides the current introduced through the inlet (11) into a first partial current supplied to the first heating chamber (100) and a second partial current supplied to the second heating chamber (200), and with an outlet (13) and a connector (50) upstream of the medium in the direction of flow, which connects the partial currents discharged from the first and second heating chambers (100, 200).The first heating chamber (100) is formed by a first flow housing (106) comprising a first system component (102) thermally coupled to the heating device (30) and a first cover (104). The second heating chamber (200) is formed by a second flow housing (206) comprising a second system component (202) thermally coupled to the heating device and a second cover (204). The distributor (40) and / or the connector (50) is formed on a separate flow-conducting component (60) that is fluid-tightly connected to the first flow housing (106) and the second flow housing (206).

The invention relates to an optically pumped quantum sensor (100) for measuring magnetic fields, comprising a spin-based sensor medium (110), an excitation light source (120) for illuminating light (124) into the sensor medium (110), a current source (121) for supplying the excitation light source (120), a magnetic field generating device (140) for generating a static magnetic field (B0), wherein the magnetic field generating device (140) comprises an electromagnet (141), and a current distribution circuit (200) configured to direct a portion of the current generated by the current source (121) to the magnetic field generating device (140).

The invention relates to the technical field of catalysts, and discloses a cobalt organic complex-copper-based composite electrocatalyst and a preparation method and application thereof.The catalyst is prepared through the steps of hydrothermal synthesis, atmosphere sintering, coordination reaction, hydrolysis and the like by modifying a copper-derived oxide carrier with cobalt tetracarboxylphenylporphyrin, and the selectivity and the current density of the multi-carbon products (such as ethylene and ethanol) prepared by electroreduction of CO2 in the acidic medium are remarkably improved. In a 1M KCl electrolyte with the pH value of 2, under the current density of 1.0 A cm <-2 >, the Faraday efficiency of the multi-carbon product reaches 89.47%, and the maximum partial current density of the multi-carbon product reaches 1.04 A cm <-2 >. By combining a proton exchange membrane flow cell system, the hydrogen evolution reaction is effectively inhibited, the carbon utilization rate is increased, and the problem of carbonate blockage of a traditional alkaline system is solved.