101 results about "Contact impedance" patented technology

The invention provides a semiconductor chip automatic test optimization system, and belongs to the technical field of electrical variable measurement. Comprising an acquisition module used for establishing an electrical variable time sequence arranged according to a time sequence, a drift analysis module used for calculating a short-time fluctuation amplitude value, a long-term drift slope and a high-frequency noise amplitude value based on the impedance time sequence arranged according to the time sequence, and a contact judgment module. The evaluation module is used for constructing a contact impedance coefficient based on a short-time fluctuation amplitude value, a long-term drift slope and a high-frequency noise amplitude value in a jth sliding window, and evaluating and optimizing the contact impedance coefficient, and the data marking module is used for marking electrical variable measurement data corresponding to a test channel which is evaluated to be instable in contact as low confidence. According to the system, the ith test channel of the temperature sensor chip can be tested more accurately, the short-time fluctuation amplitude value, the long-term drift slope and the high-frequency noise amplitude value are calculated at the same time, multi-source data participates, and the test accuracy is improved.

The invention belongs to the technical field of fault early warning, and discloses a heater fault early warning method and system based on current analysis. Comprising the steps that transient current signals of all heating wire loops in the copper bush heater are collected in real time, harmonic characteristic parameters are extracted, and a dynamic current fingerprint database and a multi-dimensional harmonic characteristic spectrum are generated respectively; dynamically calculating the contact impedance between each heating wire and the copper sleeve groove according to the dynamic current fingerprint database and the multi-dimensional harmonic characteristic spectrum; the current distribution path of each heating wire in the copper sleeve groove is restored in real time, the abnormal contact form of each heating wire is identified, the falling risk probability and falling risk strength of each heating wire are dynamically predicted by fusing the falling precursor signals of each heating wire detected in real time, and a grading early warning strategy report is generated in real time; according to the invention, fault early warning can be converted into preventive maintenance from post-maintenance, the intelligent level of operation and maintenance of the heater is improved, and the continuity and safety of production are guaranteed.

The invention relates to the technical field of connector detection, and discloses a reliability detection method based on a connector. The method comprises the following steps: acquiring real-time monitoring data of a multi-channel electrical sensor of a connector in a power-on state, wherein the real-time monitoring data covers a contact impedance fluctuation sequence, temperature rise gradient distribution and an electromagnetic leakage intensity spectrum; performing time-frequency domain fusion processing on the monitoring data, and extracting dynamic characteristic parameter sets such as impedance attenuation rate, heat conduction lag coefficient and field intensity distortion factor of each contact point; then, according to the parameter space distribution difference, a three-dimensional degradation model comprising a material performance attenuation layer, a contact surface deformation topology layer and an insulating medium loss layer is constructed; coupling mechanical stress and electric heating field intensity distribution based on the model, and generating life prediction indexes of each region; and finally, completing reliability grading according to the indexes, and outputting a detection report with key failure position marks. According to the method, comprehensive and accurate evaluation of the reliability of the connector is realized, and an effective technical path is provided for quality control of the connector.

The embodiment of the invention provides a temperature drift compensation device, method and equipment for contact impedance of a high-frequency probe card. The system is applied to the technical field of semiconductor testing and comprises a temperature monitoring module, an impedance modeling module, a compensation execution module and a cooperative control module which are connected in sequence. In this way, the technical problems that in the prior art, temperature drift compensation is slow in response and insufficient in precision are solved through the sub-millisecond-level temperature monitoring network, the nonlinear compensation model and multi-probe cooperative compensation in combination with the self-adaptive Kalman filtering algorithm.

The invention discloses a forehead flexible sensing method and system, and relates to the technical field of flexible sensing, and the method comprises the following steps: S1, obtaining microenvironment sensing data; s2, generating an original data frame; s3, performing invalid frame inducement classification on the original data frames; s4, distinguishing valid frames from invalid frames; s5, performing directional remining and parameter correction of remining-mining linkage on the judged invalid frames; and S6, dynamically adjusting the regulation and control parameters. According to the invention, through multi-dimensional microenvironment perception grading, invalid frame inducement classification and discrimination and threshold value weighting dynamic linkage fine tuning, in combination with a steaming-sampling linkage directional resampling mode, microenvironment dynamic change characteristics such as conductivity, temperature, contact impedance and the like caused by skin sweat secretion, environment temperature and humidity conduction and head actions in a wearing process can be captured; and adaptive acquisition parameters are dynamically matched according to an actual grading result of the microenvironment, so that the problem of gradual distortion of core physiological signals such as electroencephalogram and PPG caused by microenvironment change is avoided.

This application provides a bioelectrical impedance measurement method, circuit, chip, and electronic device. The method includes: obtaining a first contact impedance value corresponding to a first excitation electrode and a second contact impedance value corresponding to a second excitation electrode through a preset method; determining the transmission direction of an excitation current between the first and second excitation electrodes based on the first and second contact impedance values; controlling the excitation current to transmit between the first and second excitation electrodes according to the transmission direction; determining a target voltage value between a first and second measuring electrode, and calculating the impedance of the measured object based on the target voltage value; wherein the first and second contact impedance values ​​are different. This application can reduce the influence of contact impedance on the bioelectrical impedance measurement results, reduce the measurement error of bioelectrical impedance, and improve the accuracy of bioelectrical impedance measurement.

The invention relates to the technical field of measuring devices, and provides a clamp and a measuring system.The clamp comprises a first insulating part, a second insulating part and a measuring assembly, the first insulating part is provided with a first abutting part and a protection cavity channel penetrating through the first abutting part, the second insulating part is hinged to the first insulating part, the second insulating part is provided with a second abutting part, and the first abutting part is hinged to the second abutting part; the first abutting part and the second abutting part face each other in the second direction, the cavity opening of the protection cavity and the second insulating part are arranged in a spaced mode in the second direction, the measuring assembly is arranged on the first insulating part and comprises a conductive part, the conductive part is movably arranged in the protection cavity in a penetrating mode, and the conductive part is switched between a detection state and a storage state. According to the invention, the problems of large measurement result fluctuation and large measurement error when the contact impedance of the switch cabinet is measured can be solved.

The application discloses a kind of hydrogel electrode with adhesion and anti-sweat characteristics and preparation method and application thereof, belong to flexible hydrogel sensing material technical field.The electrode is formed by dissolving acrylic acid, hydrophobic modified tannic acid, initiator, polyethyleneimine and conductive substance in deionized water to form a precursor solution, and is prepared by pouring into mould and then carrying out ultraviolet light polymerization.The hydrogel electrode prepared by the application has good mechanical strength, excellent skin adhesion, significant anti-sweat interference ability, high conductivity and low contact impedance.The electrode can be directly attached to the skin and used as a strain sensor or to collect various bioelectric signals, and has the comprehensive advantages of high stability, good detection accuracy, low interface impedance, excellent biocompatibility, easy-to-obtain material and simple process.

The application discloses an electrooculogram signal collection and analysis system and method, relates to the technical field of bioelectric signal collection, and comprises a data processing system, a CPU central processing circuit, a medium-frequency signal generation circuit, an output circuit, a signal collection system and an electrooculogram wave analysis system. The CPU central processing circuit is sequentially connected with the medium-frequency signal generation circuit and the output circuit. The output circuit is adapted to a target to be measured through the signal collection system. The signal collection system transmits collected signals to the electrooculogram wave analysis system, and feeds back the pretreated signals to the CPU central processing circuit. The CPU central processing circuit is in data intercommunication with the data processing system, and closed-loop feedback is performed through the data processing system. The application reduces the contact impedance of the flexible electrode, improves the motion artifact suppression capability, improves the prescription optimization efficiency, and improves the treatment efficiency through clinical verification.

The application provides a high-frequency surgical system. The system comprises: a power module, which forms a surgical circuit with a surgical electrode, a medical object and a double-plate neutral electrode, and is used for generating high-frequency current flowing in the surgical circuit to deliver energy to the surgical electrode; a parallel resonant circuit, which is coupled to one electrode of the double-plate neutral electrode at two ends; an excitation signal source, which is used for providing an excitation signal to the parallel resonant circuit to generate a measurement voltage at two ends of the parallel resonant circuit for determining contact impedance between the double-plate neutral electrode and the medical object, wherein the frequency of the excitation signal matches the resonant frequency of the parallel resonant circuit; and a control module, which is used for adjusting the energy delivered by the power module to the surgical electrode according to the measurement voltage, wherein the double-plate neutral electrode, the parallel resonant circuit and the excitation signal source are in the same electrically isolated area. According to the application, the impedance detection circuit is modularized, which is beneficial to design simplification and subsequent maintenance replacement.

The present application belongs to the technical field of radio frequency skin anti-aging device, and discloses a real-time impedance compensation low-interference skin anti-aging monopolar radio frequency device, which comprises a radio frequency host, a treatment hand tool and a neutral electrode. A plurality of partitioned electrodes insulated from each other are arranged on the periphery of the main treatment electrode of the treatment hand tool, and the neutral electrode is provided with a plurality of reflux partitions insulated from each other. During the treatment pulse output period, the partitioned electrodes are connected to the protection drive unit; during the adjacent pulse interval, the partitioned electrodes are first disconnected from the protection drive unit, connected to the local detection unit after limiting and discharging through the protection discharge branch, so as to obtain the local interface impedance of each partition and the contact impedance of the reflux partition. The main loop sampling unit obtains the total equivalent impedance of the monopolar radio frequency loop. The compensation control unit determines the compensation requirement of the subsequent treatment pulse according to the total equivalent impedance, and controls the compensation execution in combination with the contact state of the treatment end and the reflux end, so as to limit or stop the radio frequency output when the contact is abnormal, and realize the time-sharing multiplexing of the protection and detection.

The invention discloses a hydrogel-based non-invasive brain-computer interface electrode with non-uniform hardness and a preparation method of the hydrogel-based non-invasive brain-computer interface electrode, relates to the technical field of flexible electronic materials and devices, and can be used for data acquisition of electroencephalogram equipment and other flexible contact media for acquiring human electrophysiological signals, such as electromyographic signals, electrocardiosignals and the like. The cross-linking times mismatching strategy is adopted, different moduli at the two ends of the hydrogel electrode are achieved, the polyvinyl alcohol solution and the sodium alginate solution are directly mixed, freezing and thawing cycles of different times are carried out, and the electrode stability and wearing comfort are greatly improved. The hydrogel reduces the contact impedance through ionic conduction, and the impedance is lower than that of a commercial electrode. The hydrogel prepared on the basis of the method can be better prevented from slipping in an electrode clamp of an electroencephalogram cap, and meanwhile more comfortable and more stable contact is provided on an interface making contact with the skin. The process provides a better scheme for a series of human electrophysiological signal acquisition systems such as electroencephalogram signals and the like, and is of great significance to promotion of commercialization of non-invasive brain-computer interfaces.

The application discloses a novel conductive chest strap preparation method, a permeable conductive reinforcing composition and a surface micro-erosion pretreatment gel. The method first weaves a segmented belt containing stretchable areas and non-stretchable electrode collection areas; then a thixotropic pretreatment gel is coated on the surface of the electrode area, a micro-erosion layer is formed on the surface of the fiber by using a solvent; then the permeable conductive reinforcing composition is forcedly absorbed into the fiber bundle under the condition of vacuum negative pressure; finally, the resin and the fiber form an interpenetrating network and chemical bonding through gradient temperature curing. Through the synergistic effect of physical structure restriction and micro-chemical anchoring, the application solves the problems of easy delamination and cracking of the conductive layer and unstable contact impedance in the traditional process, meanwhile, the gel characteristics are used to block the solvent wicking and diffusion, the elasticity of the substrate is effectively protected, and the durability and signal collection accuracy of the product are significantly improved.

The application discloses a current sensor pin bending processing control system and processing equipment, relates to the technical field of current sensor pin bending processing, and through fusion collection of three types of disturbance parameters with different physical dimensions and response mechanisms, namely, bending acceleration ZWa, pin surface contact impedance disturbance ZBd and friction spectrum response ZMc, the sensing coverage range of the system for multi-source abnormal phenomena in the processing process is significantly expanded, the identification blind area of a traditional system relying on a single force or displacement signal is made up for, and the sensitivity to non-explicit disturbance characteristics is improved. Nonlinear interaction modeling of the three disturbance factors is carried out through the micro-disturbance coupling strength index Ψ, the system can not only identify single-variable fluctuations, but also capture the collaborative evolution trend between variables. This structure enables the system to have the ability to identify the structural imbalance and coupling intensification trend of the disturbance in advance, and has higher fault foresight and active response capability.

The application discloses a preparation method of an electric field-induced hydrogel electrode and application thereof. The method mainly uses polyvinyl alcohol as a base material, combines conductive media (PEDOT:PSS, NaCl or CaCl), a chemical crosslinking agent (glutaraldehyde) and a reversible coordination crosslinking agent (sodium tetraborate decahydrate), and introduces tannic acid to improve adhesion. The core of the method is that the electric field-induced hydrogel is added dropwise to the surface of an electrode to be grown, a redox reaction is induced in a cathode area by applying an electric field, the pH value of a solution is rapidly increased, the coordination crosslinking of sodium tetraborate is activated, and the hydrogel is rapidly and in-situ solidified on the surface of the electrode. The hydrogel electrode prepared by the method has high tensile property, high conductivity and self-repairing characteristics, has low contact impedance and high signal-to-noise ratio, and can be used as a high-performance flexible electrode and applied to detection of electrocardiosignal and other electrophysiological signals, and has obvious advantages compared with commercial electrodes.

The invention discloses a progressive risk prevention and control system and method for an electrical stimulation physiotherapy instrument, and belongs to the technical field of medical equipment. The system integrates a central control unit, and an electrode contact quality detection module, a nerve excitation threshold detection module, an electromagnetic environment interference detection module, a risk grade evaluation module and a strategy generation module which are electrically connected with the central control unit. The system evaluates the risks of electrode poor contact, nerve over-excitation and electromagnetic interference respectively by detecting a micro-current contact impedance dynamic spectrum, a myoelectricity composite action potential incubation period change rate and a stimulation waveform distortion entropy. The system adopts a progressive detection method, divides risks into three levels according to key indexes such as a contact quality index, a latency drift index and waveform distortion entropy, and automatically generates corresponding prevention and control strategies for different risk levels, such as automatic deoxidation pulse, adaptive reduction of stimulation parameters or emergency termination of treatment. Accurate risk identification and dynamic prevention and control in the electrical stimulation physiotherapy process are realized, and the safety is improved.

To realize a connector for an interface which enables decrease of impedance of a contact while inhibiting displacement of a tip of the contact and can be manufactured easily.SOLUTION: A connector (1) for an interface of the disclosure includes: a housing (11); and a contact assembly (13) held by the housing (11). The contact assembly (13) includes: contacts each having a first electric contact and a second electric contact; an insulation member (24) which holds the contacts; and a locator (25) which corrects displacement of the second electric contacts in a width direction. The locator (25) has partition walls (25b) each of which is disposed between the contacts. At least parts of the partition walls (25b) partition tips of at least parts of the contacts from each other and do not exist between middle parts of the at least parts of contacts.SELECTED DRAWING: Figure 6

This invention relates to the field of battery testing technology, specifically to a method, apparatus, and system for recycling and testing lithium battery modules. The invention obtains the voltage rebound coefficient at each time point after the current cutoff; based on the time characteristics of different times after the current cutoff and different preset response time constants, it obtains the unit step response function value at each response time constant at each time point after the current cutoff; based on the unit step response function values ​​at all response time constants and the voltage rebound coefficient at different times after the current cutoff, it obtains the optimal voltage drop component for different response time constants and obtains the abnormal residual energy value; combined with the electrode temperature distribution at different times, it obtains the contact impedance coupling coefficient and diffusion impedance coupling coefficient; and performs recycling and testing on the lithium battery module. This invention improves the accuracy of module recycling by accurately analyzing the abnormal residual energy value and using a thermoelectric characteristic coupling criterion based on the electrode temperature rise rate.

This invention relates to the field of welding early warning technology, and more particularly to a spatter early warning system for projection welding based on arc acoustic signal monitoring. The system includes: a data acquisition module for acquiring arc acoustic signals, electrode surface condition data, and noise baseline during non-welding periods; an acoustic feature extraction module for generating acoustic feature signal-to-noise ratio estimates; an acoustic path state determination module for determining acoustic path state indices based on electrode wear indices and signal-to-noise ratio estimates; an acoustic feature processing module for determining correction methods for acoustic feature parameters by combining dynamic contact impedance change rate; and an early warning module for providing spatter early warning based on the corrected acoustic feature parameters. This invention achieves dynamic compensation and interference suppression of acoustic feature parameters by integrating multi-parameter adaptive correction techniques that combine electrode wear state, acoustic path attenuation characteristics, and dynamic contact impedance change rate.

The invention discloses a battery pole piece flexibility detection method and device, and the method comprises the steps: measuring the initial multi-band impedance spectrum of a pole piece, and carrying out the fitting to obtain the interface contact impedance and the impedance between active substance particles; bending and deforming the pole piece; measuring the impedance spectrum of the bent pole piece, calculating the change rate of interface contact impedance and the change rate of body impedance between active substance particles, and judging the flexibility level of the pole piece according to the range of the change rate of interface contact impedance and the change rate of body impedance between active substance particles; the method has the advantages that the flexibility of the lithium battery pole piece can be comprehensively detected and evaluated, and quality monitoring in battery production is guided.

The invention discloses a connector vibration impedance online monitoring device, which belongs to the field of connector detection, and comprises a detection box, an air cylinder I is arranged on the inner top surface of the detection box, a mounting seat is fixed at the bottom end of a piston rod of the air cylinder I, a contact impedance tester is arranged on the mounting seat, and a mounting plate is arranged in the detection box. A wiring groove is formed in the peripheral surface of the mounting plate, two rotating plates which are oppositely arranged are rotatably mounted on the side surface of the mounting plate, arc-shaped plates I are fixed to the top surfaces of the rotating plates, moving blocks are slidably arranged on the side surface of the mounting plate in the vertical direction, arc-shaped plates II are fixed to the top surfaces of the moving blocks, and sponges are fixed to the inner side surfaces of the arc-shaped plates I and the arc-shaped plates II. The connector has the effect of conveniently cleaning dust on the surface of the connector.

The invention discloses an electroencephalogram signal acquisition method and system based on a dry electrode, and relates to the technical field of biomedical signal processing.According to the electroencephalogram signal acquisition method and system based on the dry electrode, contact state initialization is conducted on electroencephalogram signals through a dry electrode array before the electroencephalogram signals are acquired, and self-inspection and multi-frequency impedance measurement are conducted on all channels; obtaining a contact quality grading result and an initial contact impedance parameter, and generating an adaptive compensation strategy in combination with an impedance change trend; dynamically adjusting a gain coefficient and input impedance based on a compensation strategy, and controlling a pre-amplifier to perform signal conditioning; extracting time domain and frequency domain features from the preprocessed electroencephalogram signals, constructing a signal quality comprehensive evaluation index for quality grading, and identifying pollution sources; after artifact elimination processing is executed based on independent component analysis and an adaptive filtering algorithm, stability verification is carried out; the problem of signal quality fluctuation caused by unstable contact between the dry electrode and the skin is effectively solved, and the reliability and accuracy of electroencephalogram signal acquisition are improved.

The invention relates to the technical field of brain-computer interfaces, and discloses a dry and wet electrode dual-purpose electroencephalogram impedance detection device and method. The device comprises an electroencephalogram electrode interface, a multi-path 2: 1 analog switch circuit, a 10: 1 analog switch circuit, a multi-path buffer drive circuit, an impedance measurement circuit, an impedance measurement interface and an electroencephalogram transmission interface. The 2: 1 analog switch circuit is used for realizing switching of a single electrode signal between an impedance channel and an electroencephalogram channel, the 10: 1 analog switch circuit is used for realizing time-sharing switching output of multiple paths of impedance signals, and the impedance measurement circuit is used for completing impedance calibration and electrode-scalp contact impedance measurement. The buffer drive circuit is used for driving and conditioning the high-internal-resistance electroencephalogram signals, and the impedance measurement interface and the electroencephalogram transmission interface are used for realizing connection and signal transmission between the device and external electroencephalogram acquisition equipment. According to the invention, random combination of the electroencephalogram cap and the amplifier is realized, and the use cost of electroencephalogram acquisition equipment is greatly reduced.

The invention provides a flexible dry electrode material, a flexible dry electrode and a preparation method, equipment and device of the flexible dry electrode. The preparation method of the flexible dry electrode material comprises the steps that a 2D flexible substrate material is provided; coating a conductive coating with a preset thickness on the surface of the 2D flexible substrate material through a surface coating process, and forming a continuous conductive layer on the surface of the 2D flexible substrate material, so that the 2D flexible substrate material with the continuous conductive layer forms a flexible dry electrode material; the flexible dry electrode material is used for collecting electroencephalogram signals. The flexible dry electrode material is formed by coating the continuous conducting layer with the preset thickness on the 2D flexible substrate material, the electrode-skin contact resistance of the flexible dry electrode material can be as low as 50 k omega or below, and the problem that the electrode-skin contact resistance is large when a traditional dry electrode is used for collecting electroencephalogram signals is solved; and the application reliability of the dry electrode in the field of high-precision and long-time electroencephalogram monitoring is improved.

The invention relates to the technical field of electrical equipment state monitoring and fault diagnosis, and discloses an electrical control cabinet fault early warning method and system based on deep learning, and the method comprises the steps: obtaining physical sensing data and control logic data, and carrying out the time sequence alignment; parsing the control data to identify a working condition mode; in the self-calibration mode, the actual temperature drop rate is used for updating a correction coefficient representing heat dissipation attenuation of the equipment; in a monitoring mode, effective thermodynamic parameters are reconstructed through a depth parameter estimation network and a correction coefficient; reversely resolving the real-time contact impedance of the monitoring node based on a heat balance differential equation; and monitoring an impedance evolution trend, and generating an early warning signal when the impedance monotonically rises and is decoupled from a load current change trend. According to the invention, through fusing the physical mechanism model and the data driving network, accurate monitoring and fault diagnosis of the contact impedance under a complex thermal environment and an equipment aging condition are realized.

The present application provides a device for measuring the contact impedance between a multi-channel electromyography electrode and a biological organism, comprising: a control processor circuit, a power supply circuit, a measurement circuit, a first multi-channel switch, a second multi-channel switch, a third multi-channel switch, a fourth multi-channel switch, an electrode interface and a grounding interface, wherein the control processor circuit is connected to other circuits and switches; the electrode interface is provided with a multi-channel connector, and the multi-channel connector is separately connected to the first multi-channel switch, the third multi-channel switch and the fourth multi-channel switch; the measurement circuit is further separately connected to the second multi-channel switch and the grounding interface; the second multi-channel switch is further connected to the first multi-channel switch; the first multi-channel switch is further separately connected to the third multi-channel switch, the fourth multi-channel switch and the electrode interface; and the third multi-channel switch and the fourth multi-channel switch are connected to the electrode interface, respectively.

The application discloses a kind of real-time monitoring impedance electric stimulation system, belong to medical electronic technical field;The system includes signal generation module, signal multiplexing module, signal acquisition module, impedance extraction module, impedance calculation module and intelligent feedback control module;Signal generation module simultaneously generates treatment stimulation signal and frequency orthogonal impedance monitoring signal;Signal multiplexing module is combined after two kinds of signals and is applied to human body by electrode;Signal acquisition module acquires mixed signal containing physiological response and impedance information;Impedance extraction module accurately extracts impedance modulation component from mixed signal using digital lock-in amplification technology;Impedance calculation module calculates electrode-tissue contact impedance in real time;Intelligent feedback control module carries out multistage threshold judgment according to impedance value, realizes alarm, parameter adjustment and safety protection function;The application realizes the synchronization of treatment and monitoring, improves the safety and reliability of system, is applicable to various electric stimulation medical equipment.

The application discloses a cylindrical battery combination probe, which comprises a probe base, a battery contact temperature needle, a negative probe and a positive probe, wherein the battery contact temperature needle, the negative probe and the positive probe are arranged along the central axis of the probe base; the positive probe is arranged at the center of the probe base; the negative probe and the battery contact temperature needle are arranged on the two sides of the positive probe; and the testing ends of the battery contact temperature needle, the negative probe and the positive probe are located on the same side of the probe base. The application has the advantages that the new cylindrical battery can be charged; the short circuit caused by the contact of two current terminals during installation or movement can be prevented; the current passing capacity of the negative probe is improved, and the contact impedance is reduced; the negative probe and the positive probe are simple to install and convenient to replace; and the positioning pin is arranged on the probe base to ensure the installation position accuracy.

The application discloses a self-adhesive electrode with low skin contact impedance and application thereof, wherein the self-adhesive electrode comprises an electrode containing Ag / AgCl material, a conductive layer and a substrate. The conductive layer changes the contact characteristics of the hydrogel and the skin by adding nano-clay in the ion-conducting hydrogel system, so that the conductive layer and the skin are tightly coupled, thereby realizing the effects of long-time stable and low contact impedance and anti-interference. In addition, the conductive layer has good tensile strength and viscoelasticity, so that a wet electrode which realizes adhesion only by the conductive layer can be obtained without using common electrode auxiliary materials such as foam, non-woven fabric and pressure-sensitive adhesive. The electrode overcomes the defect that the contact impedance of the common electrode cannot be kept stable for a long time, and simplifies the fixing mode of the electrode, and can be used for continuous acquisition of physiological signals such as electroencephalogram, electrocardiogram and electromyogram, and has the advantages of stable contact impedance, simple structure, good water retention and good biocompatibility.