106 results about "Electrostatic induction" patented technology

The invention discloses an electrostatic induction and optical imaging principle-fused online monitoring device and method for wear particles of a water-lubricated bearing, and belongs to the field of state monitoring of mechanical equipment. The device comprises a square insulation detection cavity, a detection electrode array, an electromagnetic shielding shell, a high-speed optical imaging module and a signal processing unit, the square insulation detection cavity is installed in a bearing lubrication water loop. The detection electrode array is fixed to the outer wall of the cavity and used for capturing electrostatic signals generated when the abrasion particles pass through. The electromagnetic shielding shell wraps the detection cavity and is grounded through a wire to eliminate environmental electromagnetic interference. The high-speed optical imaging module integrates a high-magnification microscope lens and a CMOS sensor, is coaxially mounted with the detection cavity, and obtains the morphology characteristics of the wear particles in real time; and the signal processing unit performs multi-modal data fusion analysis on the electrostatic signal and the optical image. Through cooperative detection of electrostatic induction and optical imaging, the monitoring precision and reliability of the wear particles of the water-lubricated bearing are remarkably improved.

The invention relates to the related technical field of dust detection, and provides a mining induced charge and light scattering fusion dust detection device and method.The dust detection device comprises a workbench, a sampling assembly and a detection assembly, and the sampling assembly comprises a sampling air pump, a conical airflow homogenizer and a closed sampling cavity; the detection assembly comprises an annular sliding rail, a light scattering detection module and an electrostatic induction detection module; the dust detection method comprises the following steps: S1, device initialization and zero calibration; s2, sampling preparation of dust-containing airflow; s3, dual-module synchronous signal acquisition; s4, data processing and temperature and humidity compensation; s5, carrying out anti-interference protection assembly; and S6, data fusion and result output. S7, device cleaning and standby; through cooperative work of the double detection modules, dust detection signals in different concentration intervals are accurately captured, wide-range coverage from low concentration to high concentration is achieved, and synchronous monitoring of dust concentration and particle size characteristics is achieved.

The invention provides a space particulate matter concentration detection method and device in an industrial and mining environment, relates to the technical field of industrial and mining environment detection, and solves the technical problem of low detection accuracy in the prior art. The method comprises the following steps: sensing a charge signal of the suspended particulate matter through a charge acquisition probe; the charge acquisition probe is used for generating induction current according to electrostatic induction charge characteristics of the suspended particulate matters; carrying out amplification processing and noise processing on the charge signal, and adopting a differential signal processing mechanism to eliminate environmental noise in the noise processing; the processed charge signals are input into a particulate matter characteristic model, and the spatial particulate matter concentration is obtained through calculation; the particulate matter characteristic model is used for representing an association relationship between electrostatic induction charge characteristics and concentrations of particulate matters with different particle sizes. The method is used in the detection process of the space particulate matter concentration.

The application relates to a device and method for electrostatic induction and sound surface wave mask electrolytic machining, belonging to the electrolytic machining field. The pump, the liquid storage tank and the electrolytic tank are connected to realize electrolyte circulation. The various components in the electrolytic tank are riveted. The anode and cathode assemblies and the shielding induction electrode assembly are inserted into the electrolytic tank. The positive and negative poles of the power supply are connected with the anode and cathode plates in the anode and cathode assemblies respectively, and the workpiece arranged in the induction electrode assembly is arranged in the electric field between the anode and cathode plates. The piezoelectric ceramic is attached to the base plate of the induction electrode assembly, and the signal generator and the power amplifier are connected with the piezoelectric ceramic. Based on the device, the piezoelectric ceramic is connected with a megasonic driving voltage to generate a surface wave on the surface of the workpiece; the anode and cathode plates are connected with direct current, and the workpiece is arranged in the electric field formed by the anode and cathode plates, so that the surface to be machined of the workpiece is subjected to oxidation reaction, and the non-machining surface is subjected to reduction reaction, thereby realizing wireless induction machining of the workpiece. The application has the advantages of simple operation, re-distribution of the electric field, enhancement of mass transfer, improvement of mask electrolytic machining precision, arrangement of multiple workpieces in the electric field formed by the anode and cathode plates, and substantial improvement of mask electrolytic machining efficiency.

The utility model discloses an electrostatic induction pendulum for earthquake monitoring and early warning based on electrostatic induction. The device comprises a pendulum and an electrostatic induction sensor, and tiny potential changes can be detected in the swinging process. As a core component, the electrostatic induction sensor consists of the following key parts: a weight module, a connecting layer I, an electrode layer, a connecting layer II and an electrostatic interaction layer. Wherein the weight module provides necessary mass so as to ensure the dynamic characteristics of the pendulum; the first connecting layer is used for fixing the connection between the weight module and the electrode layer; the electrode layer is responsible for detecting electrostatic induction signals generated by pendulum motion and converting the signals into measurable potential change; the second connecting layer is used for fixing the electrode layer and the electrostatic interaction layer; the material of the electrostatic interaction layer carries charges, and the electrostatic induction signal of the electrode layer is enhanced in the earthquake monitoring and early warning process. Through the design, the device can realize high-sensitivity monitoring of earthquake precursor, and can capture fine ground movement caused by earthquake waves. In combination with a data acquisition system and a machine learning algorithm, the device can analyze the signals in real time and automatically send early warning information to related departments and individuals when an abnormal vibration mode is detected, so that precious time is won for taking preventive measures.

The invention discloses a passive bipolar movable mask electrochemical machining device and method for a workpiece. The device comprises a power supply control system, an electrochemical machining system, a motion control system and an electrolyte circulating system, the electrochemical machining system is provided with a first electrochemical machining tank and a second electrochemical machining tank which are oppositely arranged, two electrodes are arranged in each electrochemical machining tank, and two movable masks are pressed and attached to the two faces of a workpiece to form a mask structure. The motion control system drives the two grooves to be closed or separated; the electrolyte circulating system forms flushing and sucking liquid circulation facing the surface of a workpiece through a flushing pipe and a liquid sucking pipe; the power supply control system intermittently switches the polarities of the two electrodes, so that charge distribution on the two sides of the workpiece is alternately changed, and passive bipolar electrochemical machining is realized; according to the method, photoresist is replaced by the movable mask, the process is simplified, the efficient liquid flushing and absorbing mode and the electrostatic induction machining mode are combined, the inter-electrode mass transfer and electric field uniformity are remarkably improved, and the machining efficiency, precision and depth-diameter ratio are improved.

The application is an array type electrostatic sensor, a projectile velocity measuring device and method based on the sensor. The array type electrostatic sensor is in the shape of a tube coaxially arranged behind the projectile outlet and the barrel or bore body, and a plurality of circumferentially arrayed graphite electrodes in a pleated triangle structure are arranged at the upstream and downstream cross sections along the axis of the tube. The measuring device comprises an induction unit, a signal conditioning unit and an analysis and calculation unit, obtains the electrostatic induction signal component belonging to the projectile, then according to the velocity range of different projectile models, selects the electrostatic induction signals of the electrodes at different positions in different cross sections to reconstruct the charge distribution and establish the cross correlation sensitivity matrix, and further based on the correlation focusing principle of the electrodes at different cross sections, proposes a data fusion algorithm of multiple sensor electrodes, and finally measures the muzzle projectile velocity. The application proposes to use electrostatic field sensing measurement as a new means for projectile testing in view of the complex environment of high temperature and high pressure at the muzzle.

The application belongs to the technical field of low-altitude aircraft detection, and particularly relates to a static electricity radar device for low-altitude aircraft detection and a working method thereof. The device comprises: a metal spherical shell configured to be grounded; an insulating material arranged on the surface of the metal spherical shell; a plurality of static electricity sensing electrodes embedded in the insulating material, the plurality of static electricity sensing electrodes being arrayed on the surface of the metal spherical shell, and the normal directions of the plurality of static electricity sensing electrodes converging at the geometric center of the metal spherical shell; and a signal processing module comprising a gating unit, a conditioning unit and a processing unit. The gating unit is connected to the static electricity sensing electrodes and is used for selecting specified static electricity sensing electrodes to be connected to subsequent circuits in time. The conditioning unit is configured to convert the induced charge signals into voltage signals and amplify and filter the voltage signals. The processing unit receives the digitized static electricity signals, and analyzes the spatial pose information of the low-altitude aircraft according to the signal intensity difference of different static electricity sensing electrodes. The spatial positioning of the low-altitude aircraft is realized by using the static electricity sensor array.

The utility model discloses an egg support type friction nanometer power generation pavement plate, the power generation principle of the plate is friction power generation and electrostatic induction coupling effect, current is generated through electron transfer generated by interaction between polar materials, and the purpose of pavement power generation is achieved. The plate at least comprises three structural layers, namely a compression-resistant protective layer, a friction nano power generation layer and a high-strength bearing layer from top to bottom, wherein the friction nano power generation layer is provided with a multi-layer egg support type insulating plate, a metal electrode layer, two friction surfaces which are attached to the friction nano power generation layer and have opposite polarities, an elastic support body and a rectifying circuit layer connected with the metal electrode layer. The utility model relates to a pavement plate with a function of collecting pavement vibration energy, which is arranged between a surface layer of a newly-built pavement and a structural layer or between structural layers of an existing pavement, and generates electric energy through a contact-separation friction process of a friction nanometer power generation layer under the action of vertical force and horizontal force generated by wheel load. And the application potential is wide.

The invention relates to the technical field of hydrogen peroxide preparation through an anthraquinone method, in particular to a working solution regeneration treatment method and device in the process of hydrogen peroxide preparation through the anthraquinone method, and the method comprises the following steps: step 1, adsorbing and removing moisture in a working solution by adopting a solid alkaline material; step 2, applying an electric field to the working solution, so that water drops mixed in the working solution are charged; step 3, enabling the working solution to flow along a surface with sieve pores, applying another electric field on the surface, enabling the electrified water drops to move towards the surface under the action of the electric field, enabling the water drops to be polarized and subjected to electrostatic induction by the electric field, enabling two ends of the water drops to be charged with opposite charges to form induced dipoles, enabling positive and negative dipoles of adjacent water drops to attract each other, colliding with each other, and coalescing into large water drops, large water drops are discharged along the surface with the sieve holes; 4, the working solution is transferred to a carclazyte bed, a degradation product is reduced into anthraquinone, and then the working solution repeatedly enters a hydrogenation workshop section. The method has the following beneficial effects that the regeneration effect is good, the cost is low, and the service life of aluminum oxide is prolonged.

This invention provides a multilayer polarization-enhanced liquid-solid contact separation triboelectric nanogenerator structure, comprising, from bottom to top: a first electrode layer, a polarization-enhancing dielectric layer, a triboelectric layer, a second electrode layer, and a surface nanoparticle modification layer. Both the first and second electrode layers are made of copper foil and are used to collect charges generated by electrostatic induction. The polarization-enhancing dielectric layer is a PVDF thin film, used to enhance the interfacial charge storage capacity and electric field coupling strength, thereby enhancing the electrostatic induction effect and significantly improving the device's output voltage and current. The triboelectric layer is a FEP thin film, which can acquire electrons upon contact with the droplet. The surface nanoparticle modification layer is composed of PTFE nanoparticles, which adhere to the FEP thin film, further increasing the surface triboelectric charge density and thus improving the output voltage. This invention, through liquid-solid contact electrification and electrostatic induction mechanisms, can efficiently convert the mechanical energy of rainwater into electrical energy to provide power for low-power sensors in rainfall detection.

The application belongs to the technical field of instruments and meters, and particularly relates to a transistor proximity sensor based on an interdigital electrode extended gate structure. The proximity sensor is composed of a voltage source, an ammeter, a transistor, interdigital electrodes and the like. The voltage source is used for supplying power to the transistor drain and the far gate end of the interdigital electrodes, and the near gate end of the interdigital electrodes is electrically connected with the transistor gate via a conductive lead. The working mechanism of the proximity sensor of the application relies on the synergistic enhancement effect among the electrostatic induction between the target object and the interdigital electrodes, the regulation effect of the target object on the interdigital electrode capacitance and the modulation effect of the target object on the voltage division of the near gate end of the interdigital electrodes. When the charged target object or the uncharged target object approaches the extended gate end of the interdigital electrodes, the transistor source-drain current can be changed, so that the proximity sensing function is realized.

The application discloses a kind of round crystal processing with destatic device, belong to round crystal destatic technical field, including outer box and for being used to the processing mechanism of round crystal and carrying out destatic treatment, outer box is also provided with two for sending and sending out transfer mechanism and in-out mechanism of round crystal.The application is when round crystal enters the lower side of upper electrode plate, utilize high voltage power supply and electrify lower electrode sheet, form strong electric field, the electric field is excited by electrostatic induction on the back of round crystal and generates opposite polarity charge, generates uniform electrostatic adsorption force, firmly fixed on the surface of insulating sheet, realizes the lossless, clean fixing of round crystal;The application is set up air guide cabin and inner pole needle in the two sides of upper electrode plate, by applying several thousand volts high voltage generates strong electric field, ionize air and generate a large number of free electrons and positive ion, and form directional moving ion wind under the action of electric field, ion wind is directly blown to the surface of round crystal moving to the lower side of electrode plate, can rapidly, uniformly neutralize static charge on round crystal.

The invention relates to a lean burn flameout detection method based on an electrostatic signal data equalization ratio, a used detection device comprises an electrostatic sensor, a signal conditioning circuit and a data acquisition system, and the signal conditioning circuit realizes signal amplification and filtering; the electrostatic sensor electrode captures the movement of charged particles in the flame in a non-contact manner through an electrostatic induction way to obtain an induction current signal; through the signal conditioning circuit, the induction current signal is converted into a voltage signal to be collected by the data collection system, and then the lean burn flameout precursor is judged according to the signal data balance ratio.

The invention discloses a fire-fighting unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles, the fire-fighting unmanned aerial vehicle comprises a vehicle body assembly and an adsorption assembly, the vehicle body assembly comprises a vehicle body and flight propellers arranged on the vehicle body; the adsorption assembly is arranged on the machine body and comprises a power source and an adsorption part which are connected, and the adsorption part can generate static electricity when powered by the power source and can be adsorbed to the surface of high-altitude glass through the static electricity. According to the fire-fighting unmanned aerial vehicle power supply, after the adsorption part is powered on, the adsorption part can generate high-voltage static electricity, air around the adsorption part is ionized, bound charges with opposite polarities are induced on the surface of the glass due to electrostatic induction, the bound charges and charges carried by the adsorption part form an electrostatic field, and coulomb force is generated to be strongly adsorbed together. Compared with a traditional mode that a suction cup is adsorbed to high-altitude glass in a vacuum mode, the unmanned aerial vehicle can be stably adsorbed to the surface of the high-altitude glass as long as the power source continuously supplies power to the adsorption part, adsorption is stable, and the unmanned aerial vehicle is not prone to falling off and being damaged.

The invention discloses a friction nano-generator and a preparation method thereof, and belongs to the technical field of generators. The friction nanometer generator comprises a first electrode plate, a power generation film and a second electrode plate which are sequentially arranged from top to bottom. The power generation film is composed of a first organic matter nano-structure layer, a first oxide layer, a base material layer, a second oxide layer and a second organic matter nano-structure layer. Tiny gaps are formed between the power generation film and the upper and lower electrode plates, so that the power generation film can be warped when being driven by wind power or water flow, is in periodic contact with and separated from the corresponding electrode plates, and generates alternating voltage and current signals based on a triboelectrification effect and an electrostatic induction mechanism. The metal oxide layer is introduced to serve as the transition layer, and the organic matter nano-structure layer is formed by the perfluoropolyether material in a molecular self-assembly mode, so that the efficient and stable friction power generation effect is achieved, the manufacturing process is simplified, and the production cost is reduced.

The present application relates to a kind of self-driving foot massage flexible insole.The insole is divided into four layers from top to bottom.The surface layer adopts fluorosilicone resin, and in the middle of the surface layer, there are pyramid-shaped protrusions corresponding to the acupoints of the sole, and micro-needle electrodes are distributed according to the position of the acupoints of the human foot at the edge of the groove channel.A silver metal film is used as a hollow electrode layer.The electrode layer is connected to a ring oscillator circuit inside the heightening layer through a hollow support layer, and the material of the support layer is silicone rubber.The outside of the heightening pad is a styrene-polybutadiene polymer elastomer, and a ring oscillator is installed inside it.Based on triboelectricity and electrostatic induction, the electrode layer collects electric charges and conducts them to the ring oscillator installed inside the heightening layer.The ring oscillator converts low-frequency mechanical stimulation into high-frequency stimulation.The high-frequency electric stimulation processed by the ring oscillator is connected to individual micro-wire electrodes on the surface layer through wires passing through the porous plastic of the surface layer.The foot is stimulated by the high-frequency electricity of the micro-wire electrodes to achieve a therapeutic effect.

The application discloses a kind of electrostatic spraying method of quartz boat surface insulating film, belong to the field of quartz boat, comprising the following steps: S1, by electrostatic induction and make the surface of quartz boat pre-charged;S2, using electrostatic spraying gun on quartz boat electrostatic spraying polymer coating, obtain surface insulating film;Wherein, in surface insulating film, the ratio of the total thickness of groove top surface film layer of quartz boat and the total thickness of groove bottom surface film layer is 1~3.The application improves the spraying difference ratio of the top surface and the bottom surface of the groove of quartz boat.

The invention discloses a pulverized coal fineness on-line monitoring method and device, and aims to solve the problems of serious signal attenuation, weak anti-interference capability, large long-term drift, easy wear of a sampling device and the like under the working conditions of high concentration, high humidity and strong vibration in the prior art. The invention provides an online monitoring scheme integrating bimodal sensing, deep learning and dynamic calibration. According to the system, multi-dimensional physical characteristics of pulverized coal flow are cooperatively collected through a microwave and electrostatic induction dual-mode sensor, and constant-speed passive sampling is achieved in combination with a Venturi tube without a moving part; carrying out self-adaptive preprocessing on the original signal by adopting wavelet packet denoising and temperature and pressure compensation; a double-branch attention CNN network is used for fusing time-frequency domain features, and the pulverized coal fineness is accurately predicted; and extended Kalman filtering is introduced to construct a'detection-calibration 'closed loop, and sensor drift is corrected in real time.

The invention provides a slurry pump cylinder sleeve piston fault detection system and method based on triboelectricity, and relates to the field of drilling equipment detection. The system comprises a cylinder sleeve and a piston, the cylinder sleeve is composed of a steel shell and a ceramic lining installed in an interference mode, and the piston slides in the ceramic lining in a reciprocating mode. An electrode ring is arranged between the ceramic lining and the shell and arranged on the stroke edge of the piston. The signal acquisition module is connected with the electrode ring and acquires an electric signal during relative sliding of the piston; the signal conditioning circuit filters and amplifies the signal; and the transmission unit transmits the processed signal to a central terminal. According to the scheme, real-time dynamic sensing of the piston and the ceramic lining is realized based on an electric signal generated by a triboelectric effect and electrostatic induction coupling of the piston and the ceramic lining. Abnormalities such as eccentric wear and piercing leakage of the piston can be rapidly judged by analyzing signal fluctuation characteristic changes, fault recognition is completed in a second level, and fault enlargement is effectively avoided.

This invention discloses an intelligent child safety lock system based on the trajectory recognition of a triboelectric nanogenerator array (TENG). The system collects user-input spatial trajectory information by deploying a flexible TENG array on the surface of household appliances. The TENG utilizes the coupling effect of triboelectric charging and electrostatic induction to convert triboelectric energy into electrical energy, which is then supplied to subsequent circuits. Simultaneously, the trajectory information is converted into an electrical signal that matches the trajectory. The information processing and acquisition unit modulates this signal and transmits it to the central processing unit for matching with the electrical signal of a preset unlocking trajectory. The central processing unit outputs control commands, which are then executed and fed back by the execution feedback unit. This system effectively resolves the energy efficiency conflict, significantly enhances safety, and possesses excellent environmental adaptability.

The clamp with the human body induction protection function is installed on a mechanical arm and comprises an installation base and an electrostatic induction sensor, one end of the installation base is provided with a first connecting piece used for installing an adsorption type chuck and / or a clamping type chuck in a matched mode, and the other end of the installation base is provided with a second connecting piece used for being connected with the mechanical arm in a matched mode. The second connecting piece is in insulated connection with the mechanical arm; the electrostatic induction sensor is arranged on the mounting seat and is conductively connected with the mounting seat. According to the clamp, the electrostatic induction sensor is conductively connected to the mounting base, the electrostatic charge quantity of the clamp can be monitored in real time, and when a human body gets close to or touches the clamp, the electrostatic induction sensor can sensitively recognize the change of the charge, so that the mechanical arm is controlled to stop working, and harm to the human body is prevented; the mounting seat is in insulated connection with the mechanical arm, so that interference of the mechanical arm on detection of the electrostatic induction sensor can be avoided, the detection accuracy of the electrostatic induction sensor is ensured, and the influence of mistaken shutdown on the production efficiency is prevented.

The invention relates to the technical field of electric appliance engineering, in particular to a metal particle trap structure based on electrostatic induction. Through the synergistic effect of the electrostatic induction electrode and the high-adsorption specific surface structure, a metal particle active capture trap mechanism is constructed. A high-gradient electric field generated by the induction electrode guides polarized metal particles in the environment to migrate to the trap groove; the trap groove dissipates kinetic energy of collision metal particles through a special inclined plane geometric structure and a surface coating, so that the particle capturing probability is improved; and meanwhile, the metal particles are finally deposited at the bottom of the trap in the migration process by combining the effects of structural diversion, dielectrophoretic force induction and gravity settling. The above various synergistic effects significantly improve the global capture efficiency of particles of different materials, sizes and motion states, and the method is suitable for a direct current GIL / GIS environment with complex electric field distribution.

This application discloses a flexible motion sensor, a motion detection device, and a motion detection method. The flexible motion sensor includes a detection tube comprising a flexible section and a signal generation section. One end of the flexible section is closed, and the other end is connected to the signal generation section. A first electrode and a second electrode are both sleeved on the outside of the signal generation section. A charged liquid column moves within the signal generation section, changing the potential of the first or second electrode based on electrostatic induction. This application increases fluid pressure through the bending and compression of the flexible section. The charged liquid column, under pressure, moves between the two electrode plates, changing their potentials through electrostatic induction, thus achieving self-powered detection with the advantage of small size. The charged liquid column, flowing as liquid within the signal generation section, reduces frictional resistance with the detection tube, making its movement more flexible and extending the service life of the flexible motion sensor.

According to the steering wheel hand-leaving detection device, the vehicle, the hand-leaving detection method and the storage medium, additional energy supply is not needed, negative charges are generated on the surface of a friction functional layer by means of the electronegativity difference between the hands of a driver and the friction functional layer, and positive charges are induced on a first electrode layer through the electrostatic induction effect; the first electrode layer generates a first electric signal based on the potential difference, the dynamic track of the hand is monitored through signal analysis, the insulation cooperation layer makes contact with the pressure sensing layer through the holding pressure of the hand of a driver in the static state, the insulation cooperation layer generates negative charges, and the pressure sensing layer generates positive charges. And then a second electric signal is generated on the second electrode layer, static monitoring is carried out on the hand by analyzing the second electric signal, accurate identification and detection of hand leaving can be realized by combining dynamic track monitoring and static monitoring of the hand, and the driving safety is improved.

Provided are a nanoparticle generating device and a desalination device using same, the nanoparticle generating device comprising: a raw material supply unit that provides seawater or wastewater; a gas supply unit that provides a gas; an electrode positioned opposite to the raw material supply unit; a voltage application unit that applies a voltage between a needle portion of the raw material supply unit and the electrode to form an electric field in a space therebetween; and a spray nozzle which has one side connected to the raw material supply unit and the gas supply unit, and which uses the flow of the gas, provided via the gas supply unit, to mix the gas with the seawater or wastewater and spray same outward from the other side. The needle portion of the raw material supply unit is electrically grounded, and the seawater or wastewater charged by the grounding state is provided to the spray nozzle. The seawater or wastewater, charged with electrostatically induced charges, is mixed with the gas to generate an electrostatic explosion and nanoparticulated to produce fine particles, and the produced fine particles are sprayed outward.

The application discloses a closed outer window non-contact dust removal device and method based on indoor electrostatic induction, relates to the technical field of high-rise building outer window maintenance, and is applied to cleaning the outdoor side glass of a closed outer window. All components of the device are arranged on the indoor side of the glass and include a static electricity generation host for generating a high-voltage static electric field, an insulating adhering probe electrically connected with the static electricity generation host and used for adhering to the indoor side surface of the glass and applying the high-voltage static electric field to the glass, and a power supply module and a control unit electrically connected with the static electricity generation host and used for power supply and control of the working state. The insulating adhering probe includes a base body section, an adhering section and a static electricity energy-gathering directional structure. Through the high-voltage low-current electrostatic induction technology and the insulating adhering conduction structure design, the safe, efficient and non-contact dust removal of the outdoor side of the closed outer window is realized.

The application provides a cell structure of an IGBT device, an IGBT device and an IGBT short-circuit protection circuit. In the cell structure of the IGBT device, a sampling cell is integrated to form an electrostatic induction transistor in the periphery of an IGBT transistor formed by the main cell of the IGBT device. Thus, the sampling voltage of the weak current on the sampling induction electrode of the sampling cell can be directly obtained, the voltage state of the collector of the IGBT transistor can be fed back in real time, the IGBT device can be safely and quickly detected according to the feedback result whether it is in the off state, and the application has the advantages of simple structure, high integration, fast response, simplified peripheral circuit and low cost.

The invention provides a particle separator experimental device based on electrostatic induction and a sand-dust separation efficiency measuring method. The experimental device comprises a vibrating screen, a rectification lip, a particle separator main body with a one-inlet two-outlet bifurcated pipeline structure, a sand dust concentration measuring probe, an inlet total pressure measuring probe, an inlet static pressure measuring probe, a bypass flow outlet total pressure measuring probe, a bypass flow outlet static pressure measuring probe, an observation side wall and a main and bypass outlet switching section, current is generated through friction between the sand dust particles and the electrostatic induction probe, and the sand dust concentration is measured, so that the sand dust separation efficiency of the particle separator is obtained through conversion. The structure of the device is easy to realize, the sand-dust separation efficiency can be measured without an additional sand-dust collecting device, the problem of pressure loss caused by a conventional sand-dust collecting device is avoided, the requirements on an experiment site and an air source are relatively low, and the experiment cost can be reduced.

A sialic electric induction system is provided. The static electric induction system includes a heat generating electric component; a dielectric cooling fluid; a cooling passage structure along the electric component; and a pump arrangement arranged to alternatingly be controlled in a first mode and in a second mode. In the first mode, the pump arrangement pumps the dielectric cooling fluid to be driven through the cooling passage structure in a forward direction to cool the electric component, and in the second mode, the pump arrangement pumps the dielectric cooling fluid to be driven through the cooling passage structure in a reverse direction, opposite to the forward direction, to cool the electric component. A method of controlling a static electric induction system is also provided.