83 results about "Dual electrode" patented technology

The invention discloses a magnetic field auxiliary dry type electrochemical polishing device and method for the inner surface of a pipeline, and the device comprises a base which is provided with a double-sliding-block displacement table, and the double-sliding-block displacement table is provided with a lower sliding block and an upper sliding block; a motor clamp is arranged on the upper sliding block, a motor is arranged on the motor clamp, the motor is connected with an electrode clamp, and the electrode clamp clamps an electrode; a workpiece clamp is arranged on the lower sliding block, a workpiece is arranged on the workpiece clamp, a lower container is arranged below the workpiece, an annular magnet is arranged outside the workpiece in a surrounding mode, and an inner space formed by the workpiece and the lower container is filled with a solid medium. The electrode clamp is connected with the rotating end of the conductive slip ring, and the static end of the conductive slip ring is connected with the anode of the power supply through a wire. The magnetic field assists in regulating and controlling ion migration, dry type electrochemical polishing is achieved by combining the synergistic effect of the two electrodes, liquid electrolyte pollution is avoided, and the device has the advantages of being high in polishing uniformity, convenient and fast to operate and low in cost and is suitable for precise runner inner surface treatment of the additive manufacturing pipeline.

A dual electrode DC electric arc melter 10 for a conductive material 12 comprises a vessel 14 for holding the material. The vessel comprises a sidewall 16, a roof 18 and a bottom 20 and defines a taphole 22 for molten metal. A tilting mechanism 24 enables selective tilting of the vessel to tap the molten metal from the vessel. First 26 and second 28 electrodes, in a normal operative position, extend through the roof into the vessel. An electrode manipulating arrangement 30 is configured to move the electrodes between the normal operative position and a position away from the vessel. A DC power system 32 drives via a DC output the first electrode as a cathode and the second electrode as an anode. An arc deflection compensation circuit 50 is provided for reducing deflection towards the sidewall of arcs extending from the first and second electrodes.

The invention discloses a double-flow slab tundish with a double-electrode plasma heating function. The double-flow slab tundish comprises a tundish body and a tundish cover arranged at the top of the tundish body, and a turbulence controller is arranged at the bottom of the tundish body; a barrage structure is arranged at one end of the interior of the tundish, and a uniflow control wall structure is arranged at the other end of the interior of the tundish. And a dual-electrode plasma heating device is arranged on the ladle cover. Single-flow pouring of the double-flow tundish is achieved, the size of a low-temperature area and the size of a dead area are reduced, slag entrapment is prevented, the temperature in the tundish is uniform, and the plasma heating efficiency is improved. And meanwhile, the tundish casting allowance is reduced.

The invention discloses a double-excitation double-electrode electromagnetic flowmeter for high-frequency pulsating fluid measurement. The double-excitation double-electrode electromagnetic flowmeter comprises a pipe body structure and a control circuit. The pipe body structure comprises a lining and a guide pipe; the inner side face of the guide pipe is covered with a lining. A first group and a second group of electrodes are arranged in the conduit; a first group and a second group of coils are arranged at corresponding positions of the first group and the second group of electrodes in the inner cavity of the catheter; first and second magnetic field shielding covers sleeve the circumferential outer side of the conduit; the first and second groups of coils are respectively positioned inside the first and second magnetic field shielding covers; an annular grounding electrode is arranged between the first group of electrodes and the second group of electrodes; the annular grounding electrode is connected to the conduit through the grounding fastening electrode; the control circuit comprises a CPU module; the CPU module generates complementary periodic excitation waveforms to excite the coil, controls acquisition of electrode signals and is used for calculating flow data of fluid in the conduit. According to the invention, high-fidelity and continuous measurement of the flow of the high-frequency pulsating fluid can be realized, and the measurement precision is ensured.

This invention relates to a g-C3N4@NiS composite photoelectrocatalyst and its preparation and application. The catalyst has a flower-like hierarchical porous structure, composed of g-C3N4 nanospheres and NiS nanoparticles supported thereon. The g-C3N4 nanospheres are assembled from stacked nanosheet layers. The NiS nanoparticles and g-C3N4 nanospheres form an in-situ covalently bonded heterojunction through Ni-S and Ni-N bonds, constructing a p-n heterostructure. The preparation method involves mixing melamine, glucose, CTAC, nickel acetate, and thiourea, and simultaneously achieving the condensation polymerization of g-C3N4 and the growth of NiS using a low-temperature one-pot hydrothermal method. Under alkaline conditions, the HER overpotential of this catalyst is only -2 mV at 10 mA cm⁻¹. ‑2 The overpotential of OER is 270 mV at 10 mA cm⁻¹. ‑2 In the dual-electrode total water splitting system, only 2.4 V is required to achieve 20 mA cm⁻¹. ‑2 It achieves a high current density and operates stably for over 24 hours, exhibiting excellent catalytic activity and stability in seawater. This invention boasts advantages such as a simple synthesis process, strong interfacial coupling, superior catalytic performance, and resistance to seawater corrosion.

This invention relates to a bipolar plate assembly for a PEM electrolyzer and its manufacturing process. The PEM electrolyzer bipolar plate assembly includes: a bipolar plate; the bipolar plate includes a metal electrode plate and a first sealing ring; the metal electrode plate is provided with a flow channel, a first annular sealing groove, an oxygen inlet, a water inlet, and a hydrogen inlet; the first sealing ring is adapted to the shape and size of the first annular sealing groove and is integrally vulcanized with the metal electrode plate; two titanium felts and two titanium meshes; the bipolar plate, two titanium felts, and two titanium meshes are sintered into a single assembly, and the arrangement from top to bottom is: titanium felt - titanium mesh - bipolar plate - titanium mesh - titanium felt. This invention improves the flatness of the titanium felt / mesh surface and the accuracy of positioning during assembly by sintering the titanium mesh, titanium felt, and bipolar plate together, thereby improving assembly quality and production efficiency, while also reducing energy consumption during water electrolysis.

The invention discloses an echelon utilization lithium ion battery pack capable of losslessly replacing internal batteries. The echelon utilization lithium ion battery pack comprises a battery pack shell, a top cover, a battery limiting plate, a first electric connecting plate, a second electric connecting plate and an air duct structure, the battery limiting plates sleeve the single battery cells and are bonded with the inner wall of the shell through heat-conducting glue to limit the horizontal displacement of the battery cells; the first electric connecting plate and the second electric connecting plate are respectively propped against two ends of the battery cell and are matched with two types of battery cells, namely single-end single-electrode and single-end double-electrode; air ducts are arranged on the top cover and the bottom plate of the shell and matched with ventilation holes of the electric connecting plate and the limiting plate, and forced convection heat dissipation is achieved under the action of the exhaust device. According to the invention, the failed battery cell can be replaced without damage, the echelon utilization value is improved, the battery cell is compatible with various types, the heat dissipation is efficient, and the adaptability is strong.

The invention discloses a nerve monitoring condensable and cuttable electrode and an electrocoagulation operation system. The nerve monitoring condensable and cuttable electrode comprises a handle shell, a condensable and cuttable high-frequency operation electrode assembly, a nerve detection electrode assembly and a driving control mechanism, wherein the condensable and cuttable high-frequency operation electrode assembly and the nerve detection electrode assembly are arranged in the handle shell. The driving control mechanism comprises an external operation part and an internal transmission assembly, and the external operation part is in transmission connection with the two electrode assemblies through the internal transmission assembly. When the external operating part moves towards a first direction, the high-frequency operation electrode assembly is driven to extend out and the nerve detection electrode assembly is synchronously driven to retract; otherwise, the nerve detection electrode assembly is driven to stretch out, and the high-frequency operation electrode assembly is synchronously driven to retract. Reverse linkage and physical mutual exclusion of the two electrodes are achieved through the internal transmission assembly, it is ensured that only one functional head is located at the working position at the same time, and the risk that due to the fact that the two electrodes stretch out at the same time, mutual interference of different energies and accidental touch of non-target tissue are possibly caused in the operation process is avoided.

A two-electrode submerged arc welding method capable of improving the quality of welded joints is provided. [Solution] A two-electrode submerged arc welding method includes distributing a cut wire within a groove of a base material (2), outputting current from a power source via a leading electrode (3) to energize a leading welding wire (4) and generating an arc (A) between the base material (2) and the leading welding wire (4) within the groove, and energizing a trailing electrode (6) from the power source to supply a heated filler wire (7) to a molten pool (P) formed behind the arc (A) while welding is proceeding, without generating an arc, wherein the leading electrode (3) is inclined toward the welding direction (X) at a predetermined sweepback angle (θ) with respect to an axis (Z) perpendicular to the welding direction (X) and the base material (2).

The invention discloses a flexible bioelectric surface dry electrode based on a magnetic tunnel junction and a preparation method of the flexible bioelectric surface dry electrode. The flexible bioelectric body surface dry electrode comprises a flexible substrate, and a bottom electrode lead, an insulating layer, a discrete conductive island array, an MTJ spinning electron functional layer, a microneedle biological contact layer, an interface leveling insulating layer, a confluence top electrode and a top electrode lead which are arranged in sequence. A conductive island array and top-bottom dual-electrode collaborative design is adopted: a conductive island focuses a weak bioelectric signal on a body surface, so that the weak bioelectric signal vertically passes through an MTJ functional layer, magnetic moment deflection is driven by an Oersted field excited by a bioelectric current, and in-situ amplification of the signal is realized by using an MTJ tunneling magnetoresistance effect. In combination with the low-impedance contact characteristic of the microneedle, the electrode effectively reduces motion artifacts, breaks through the bottlenecks of signal attenuation and dependence on an external amplification circuit of a traditional dry electrode, has high sensitivity, high signal-to-noise ratio and wearing comfort, and is suitable for the fields of electroencephalogram and electrocardio acquisition and wearable health monitoring.

The application discloses a nerve monitoring coagulation and incision electrode and an electrocoagulation operation system. The nerve monitoring coagulation and incision electrode comprises a handle shell, a coagulation and incision high-frequency operation electrode assembly and a nerve detection electrode assembly arranged in the handle shell, and a driving control mechanism. The driving control mechanism comprises external operating parts and an internal transmission assembly. The external operating parts are respectively in transmission connection with the two electrode assemblies through the internal transmission assembly. When the external operating parts move in a first direction, the high-frequency operation electrode assembly is driven to extend and the nerve detection electrode assembly is synchronously driven to retract. Conversely, the nerve detection electrode assembly is driven to extend and the high-frequency operation electrode assembly is synchronously driven to retract. The application realizes reverse linkage and physical mutual exclusion of the two electrodes through the internal transmission assembly, ensures that only one functional head is in a working position at the same time, and avoids the risk of possible mutual interference of different energies and mis-touching of non-target tissues in the operation process caused by the extension of the two electrodes at the same time.

The application provides an active material, a preparation method thereof, a lithium ion battery and a preparation method thereof. The active material comprises an inner core and a coating layer coated on at least part of the surface of the inner core; wherein the inner core comprises lithium vanadium phosphate, and the coating layer comprises a solid electrolyte material. In the lithium ion battery, a double-electrode lithium ion battery is constructed by taking lithium vanadium phosphate as the inner core of the active material, so that the lithium ion battery has good safety; and by coating the coating layer comprising the solid electrolyte material on the surface of the inner core of the active material, the electrochemical performance of the double-electrode lithium ion battery is improved.

The invention discloses a double-electrode high-precision synchronous rotation movement mechanism for rotary printing electrolytic machining, and relates to the technical field of electrolytic machining, the double-electrode high-precision synchronous rotation movement mechanism comprises an anode main shaft assembly, a cathode main shaft assembly and an electrolyte isolation assembly, comprising an inner and outer wall rotary printing electrolytic machining method and a'guiding-following 'control strategy of a main shaft; the main shaft assembly comprises a thrust centripetal cylindrical roller bearing, a deep groove ball bearing, a hollow stepped main shaft, a coupler, an absolute encoder, a direct drive motor and the like. The direct-drive motor is directly coupled to drive the main shaft, so that an intermediate transmission link is omitted, and mechanical errors are reduced; the spindle phase is fed back in real time based on an absolute encoder; a'guiding-following 'control strategy is adopted, high-precision synchronous contra-rotation of the cathode spindle and the anode spindle is achieved, reversing rotation can be achieved in the high-precision synchronization process, and the rotary printing electrolytic machining device is suitable for rotary printing electrolytic machining of the outer wall and the inner wall of a large thin-wall rotary body part.

The application belongs to the technical field of environmental electrocatalytic electrode preparation, and particularly relates to a preparation method of a magnetic spinel adsorption electrode and application thereof. The specific preparation steps are as follows: 1) dispersing the magnetic spinel catalyst in an electrolyte to form a suspension system; 2) constructing a double-electrode electrochemical system in the suspension system by taking foamed nickel as a cathode; and 3) stirring the suspension system, performing electrolysis reaction, and obtaining the magnetic spinel adsorption electrode after drying. The prepared adsorption electrode does not need to add an additional binder to realize the fixation of the magnetic spinel catalyst on the foamed nickel substrate, overcomes the problem of sharp reduction of the number of active sites and conductivity caused by the binder, and greatly improves the electrode catalytic degradation capacity. In addition, the preparation method does not need to consume additional binders and organic solvents, can effectively reduce the synthesis cost of the spinel electrode and reduce the discharge of waste liquid, and is an environmentally friendly catalyst synthesis method.

The utility model relates to a kind of double electrode temperature compensation cooking equipment, including base and the panel for placing cookware, panel covers on base, base is built-in processing module, heating furnace tray, at least one capacitance detection module is equipped in the furnace tray interior space of heating furnace tray, each capacitance detection module has the detection electrode for sensing cookware, wherein at least one capacitance detection module is equipped with reference electrode for sensing the temperature around detection electrode, the distance of reference electrode top surface from panel is less than the distance of detection electrode top surface from panel to form height difference;Capacitance digital conversion circuit is built-in in base, capacitance digital conversion circuit is respectively coupled each electrode, for obtaining the single-end self-capacitance of each detection electrode and reference electrode or the differential self-capacitance of detection electrode and reference electrode formed;Processing module is coupled capacitance digital conversion circuit, for the detection signal of outputting whether there is cookware on double electrode temperature compensation cooking equipment according to the differential result of the self-capacitance of detection electrode and reference electrode.

A method for denitrifying ammonia nitrogen wastewater containing chlorine-oxygen free radicals is disclosed. The method uses ruthenium dioxide / titanium dioxide (RuO2 / Ti) as the anode and mesoporous carbon-modified carbon paper (CMK-3 / CP) as the cathode. Sodium sulfate, sodium chloride, and iron-modified graphene oxide as the particle electrode are added to the container containing ammonia nitrogen wastewater, forming a dual-electrode and particle-electrode electrochemical ammonia nitrogen denitrification system. Oxygen is then introduced into the cathode region, and the electrolysis current density is controlled to achieve denitrification of the ammonia nitrogen wastewater. This invention utilizes RuO2 / Ti to oxidize chloride ions to active chlorine (ClO2). ‑ Simultaneously, oxygen is reduced to hydrogen peroxide through mesoporous carbon-modified carbon paper, and the generated active chlorine and hydrogen peroxide are enriched in iron-modified graphene oxide particles. The hydrogen peroxide is further absorbed by the Fe atoms in the iron-modified graphene oxide particles. 2+ / Fe 3+ The cyclic catalytic process generates HO•, which can react with active chlorine to generate ClO•. ClO• can selectively oxidize ammonia nitrogen to nitrogen gas, generating high steady-state concentrations of chloroxygen free radicals, thus achieving efficient denitrification treatment of ammonia nitrogen wastewater.

The invention belongs to the technical field of gas chromatographic analysis, and particularly relates to an explosion-proof discharge helium ionization detection system and a preparation method thereof. A discharge chamber and an ionization chamber are coaxially arranged on the inner sides of the upper end and the lower end of a detector main body respectively, and the discharge chamber and the ionization chamber are communicated through a needle-shaped small hole; a dual-electrode feed-through flange upper cover is fixed at the upper end of the discharge chamber in a sealing manner; dual electrodes in the dual-electrode feed-through flange upper cover coaxially extend into the discharge chamber and are respectively connected with a positive electrode and a negative electrode of a high-voltage power supply; a current sensor is fixed at the lower end of the ionization chamber in a sealing manner, and the current sensor extends into the ionization chamber through a parallel pole plate and is used for acquiring ion current; the explosion-proof housing wraps the detector main body and is provided with a sealing hole for a coaxial cable to pass through. According to the invention, the influence of gas path sectional area change on carrier gas flow velocity and gas path pressure drop is reduced, so that the detection performance is improved.

The invention discloses a device and a method for measuring a nonlinear coefficient and an attenuation coefficient of main beam surface wave detection, relates to the technical field of cranes, solves the problem that online measurement of fatigue damage state evaluation parameters of a crane main beam is difficult to realize, and comprises a piezoelectric surface wave transducer and two dual-electrode piezoelectric film sensors, all the pressing plates press the to-be-detected surface of the to-be-detected steel plate; the dual-electrode piezoelectric film sensor closer to the piezoelectric surface wave transducer is a first sensor, and the dual-electrode piezoelectric film sensor farther from the piezoelectric surface wave transducer is a second sensor; the piezoelectric surface wave transducer is used for exciting surface waves, the first sensor and the second sensor are used for receiving the surface waves, and the measuring device is fixed through the magnet, convenient to assemble and disassemble, reliable in fixation, small in size and capable of adapting to the working environment of the crane.

The invention provides a dual-electrode structure capable of stably, continuously and independently generating double bubbles and a preparation method. The dual-electrode structure comprises an external insulating tube, an electrode wire, an internal insulating tube, a wire and a sealing body, a first electrode wire is arranged in the internal insulating tube, a second electrode wire is arranged in the external insulating tube, the first electrode wire is parallel to the second electrode wire, the first ends of the first electrode wire and the second electrode wire are connected with a wire, and the second ends of the first electrode wire and the second electrode wire are flush with and sealed with the end face of the external insulating tube. A sealing body is arranged in a gap among the external insulating tube, the wire and the internal insulating tube at the first end; the first end of the internal insulating tube and the first end of the first electrode wire are arranged in the sealing body, and the two electrode wires are insulated in the external insulating tube; and micron-sized single bubbles are generated on the surface of the electrode, so that short circuit or corrosion caused by electrolyte leakage is prevented, generation of multiple bubbles on the surface of the electrode is eradicated fundamentally, it is guaranteed that the electrode only generates single bubbles at the same time, and the service life of the device is prolonged.

The invention discloses a sleeping instrument based on dual-electrode electrical stimulation and a voice module, and belongs to the technical field of sleeping instruments. Comprising an eyeshade body, two tying belts are symmetrically arranged on the outer side of the eyeshade body, a first FPC soft board is arranged in the eyeshade body, a magnetic attraction female base is arranged on the front face of the first FPC soft board, a hardware shell is arranged on the outer side of the magnetic attraction female base, a second FPC soft board is arranged in the hardware shell, and the first FPC soft board and the second FPC soft board are arranged in the eyeshade body. The bottom surface of the hardware housing is provided with a magnetic suction port, and the magnetic suction port is in magnetic connection with the magnetic suction female seat. The self-developed gel electrode is adopted, different from most products in the market, the self-developed gel electrode has good fitness and conductivity, can be directly attached to the scalp for use, does not need to additionally treat hair or smear conductive adhesive and can be conveniently taken down at any time, meanwhile, the hardware shell is designed to be lightweight, detachable connection is achieved through the magnetic suction port and the magnetic suction female base, and the practicability is high. And the burden during wearing is further reduced.

The invention provides an organic pollutant degradation system based on dual-electrode synergy and application. The organic pollutant degradation system comprises an anode and a cathode, chitosan carbon aerogel coatings modified by electrode modification elements are arranged on the surface of the anode and the surface of the cathode, the electrode modification elements on the surface of the anode comprise titanium, cerium or boron, and the electrode modification elements on the surface of the cathode comprise copper, cobalt or nickel. In the system, the cathode and the anode form a synergistic electrode pair, and a chitosan carbon aerogel coating containing specific modification elements is arranged on the surface of the synergistic electrode pair, so that the problems of incomplete degradation and more byproducts of a single technology are solved. The system is suitable for degradation of various organic pollutants, does not need a complex process, is stable and durable, and provides a practical scheme for treatment of degradation-resistant organic wastewater in multiple fields. The invention also provides application of the organic pollutant degradation system in organic pollution wastewater treatment.

The present invention provides a capacitor having a double electrode layer in which the thickness of the double electrode layer per one super cycle can be finely adjusted to be 1 nm to 2 nm by a tin doped molybdenum oxide (TMO) process having one super cycle of an atomic layer deposition process including a Mo deposition sub-cycle for forming a Mo oxide layer and a Sn oxide doping sub-cycle for doping the Sn oxide, thereby reducing an equivalent oxide thickness and a leakage current and increasing a dielectric constant.

The invention discloses a preparation method of a dibutyryl chitin / molybdenum disulfide / graphene oxide composite porous carbon material, a high-performance energy storage material is prepared through chitin acylation modification, transition metal sulfide compounding and reduced graphene oxide interface regulation, and dibutyryl chitin is innovatively adopted as a porous polymer skeleton; by utilizing a thermally induced phase separation method, stacking and gathering of a two-dimensional material are avoided, and MoS2 nanosheets, graphene oxide and a polymer substrate with three-dimensional communicated pore channels are uniformly compounded; and carbonizing and activating by using an activating agent to finally obtain the porous carbon composite material with graded pore channels, heterogeneous interfaces and multi-doping synergistic effect. The specific capacitance of the material under the current density of 0.5 A.g <-1 > reaches 420 F.g <-1 > to 480 F.g <-1 >, the energy density under a dual-electrode system reaches up to 20 Wh.kg <-1 > (1A. G <-1 >) or above, the cycling stability is excellent, and the capacity retention ratio exceeds 80% after 10000 times of charging and discharging (10 A.g <-1 >).

This invention belongs to the field of steel pipe manufacturing technology, specifically relating to a method for manufacturing high-frequency straight seam welded pipes for dense-phase / supercritical CO2 transportation and the high-frequency straight seam welded pipes prepared using this method. It aims to solve the problem of the lack of stable and safe CO2 transportation pipelines suitable for long-distance, high-capacity dense-phase / supercritical CO2 transportation in existing technologies. The invention includes: pipe rolling, using an FFX rolling mill to roll milled steel strips into pipe blanks; high-frequency welding, performing high-frequency welding on the weld points of the pipe blanks using a double-electrode elastic floating contact welding process; and heat treatment. This invention can overcome the low-temperature crack initiation and crack arrest toughness defects in the application of high-frequency welded pipes for dense-phase / supercritical CO2 transportation.

This invention provides a method for fabricating a lateral dual-electrode device array based on laser etching. Utilizing the cumulative photothermal effect of pulsed laser during the etching process, an insulating channel is formed by etching a conductive layer with the pulsed laser. Simultaneously, the photothermal effect generated near the pulsed laser beam destroys the hydrophobic layer on both sides of the channel, thereby reducing its hydrophobic effect and forming a heat-affected zone (HAZ). When a solution capable of growing crystals using a solution method is coated onto the substrate, the presence of the HAZ ensures that the solution can wet and completely cover the laser-etched channel. Finally, the deposited crystalline film can laterally span both sides of the channel, forming a lateral dual-electrode device. According to the fabrication method of this invention, there is no need to separately prepare the array of active and electrode materials; only a single patterning process, laser etching, is required to complete the fabrication, achieving the fabrication of large-area, high-throughput, arrayed lateral dual-electrode devices.

The invention discloses an array-type dual-electrode chip and application thereof in high-throughput nucleic acid detection, the array-type dual-electrode chip comprises a first electrode layer, a second electrode layer, a third electrode layer, a fourth electrode layer, a fifth electrode layer and a sixth electrode layer, which are sequentially stacked, and the first electrode layer is provided with a plurality of sample loading holes, a first etching line and a first conductive connecting layer; the sample loading holes penetrate through the first electrode layer and are distributed in an array manner; the middle insulating layer is provided with a plurality of communicating holes; the communicating hole and the sample loading hole are correspondingly arranged; the second electrode layer is provided with a plurality of broken line frames, a second etching line and a second conductive connecting layer; the broken line frame is arranged corresponding to the sample loading hole; and the communicating hole is matched with the first electrode layer and the second electrode layer to form a reaction chamber. According to the array type dual-electrode chip disclosed by the invention, the problems of poor sealing performance and unstable signals of a traditional chip are solved through the design of the bipolar electrodes and the sandwich closed structure; and the matrix type layout realizes high-throughput synchronous detection of multiple targets, and the detection efficiency is remarkably improved.

The invention relates to a dual-electrode biosensor structure, which belongs to the technical field of biosensors and comprises a ceramic substrate, the surface of the ceramic substrate is provided with a dual-electrode system composed of a platinum working electrode and a silver / silver chloride reference electrode, and the two electrodes are connected through a conductive path. The surface of the working electrode is provided with an enzyme layer, and a non-functional area is covered with a blue epoxy resin isolation layer. The double-electrode structure works under the condition that the current density is smaller than or equal to 10 nA / mm < 2 >, the response time is smaller than or equal to 4 seconds, bubble interference is effectively eliminated by simplifying electrode configuration, and the technical effects that the detection error rate is remarkably reduced and the enzyme activity is stable for a long time are achieved by combining the design of the anti-hemolysis isolation layer.

The invention belongs to the technical field of self-powered pressure sensing, and particularly relates to a low-noise self-powered array pressure sensor, a preparation method thereof and a signal processing system. The array pressure sensor comprises a PCB, and an electrode layer array, an interference shielding layer, a lower friction layer, a spacing layer, an upper friction layer and a pressed layer which are arranged on the PCB. Wherein the electrode layer array is surrounded by the interference shielding layer and isolated from each other, the interference shielding layer is arranged below the lower friction layer, the lower friction layer is arranged below the spacing layer, the spacing layer is arranged below the upper friction layer, and the upper friction layer is arranged below the compression layer. Compared with a dual-electrode triboelectric array, the single-electrode layer array pressure sensor based on triboelectrification has the advantages that the number of wires is reduced by half, the number of IO ports required by a circuit is effectively reduced, and the complexity of a signal processing hardware system is reduced.

The utility model discloses a fault detection device of a dual-electrode electrochemical sensor, which comprises a plurality of signal detection units connected with a control unit, and a power conversion unit supplies power to the control unit and the signal detection units. The signal detection unit comprises a sensor signal branch which is connected with the signal input end of the control unit and outputs a sensor detection signal; the self-checking control branch circuit is connected with the sensor signal branch circuit and is used for receiving a self-checking signal of the control unit to start sensor detection or closing; and the reference voltage branch provides reference voltage for the sensor signal branch. According to the utility model, the dual-electrode electrochemical sensor is connected into the fault detection device in a plugging manner, fault detection and rapid determination of one or more electrochemical sensors can be completed within several seconds, the number of detection channels can be freely increased or reduced, and simultaneous detection of different types of dual-electrode electrochemical sensors is supported.