144 results about "Homogeneous electric field" patented technology

The invention provides a device and method for testing the reliability of a power sensor, and the device comprises a magnetic field generation unit which is used for providing an alternating current for a Helmholtz coil through a power frequency current source, and generating a controllable magnetic field; the electric field generating unit is used for providing a high-voltage direct current or power frequency alternating current power supply for the parallel-plate capacitor through a high-voltage generator to generate a uniform electric field; the tested unit is used for providing a standard excitation signal through a standard source matched with the to-be-tested sensor, simulating an input condition of the to-be-tested sensor under an actual working condition and collecting output data of the to-be-tested sensor; and the control unit is used for setting test parameters, generating a control instruction according to the test parameters and generating a test result according to the output data. According to the device and the method, by simulating a strong magnetic field and a strong electric field environment and combining application of various measured parameters and an automatic control system, the reliability evaluation requirement of the sensor under the actual working condition is fully met.

The invention provides a temperature rise test system, and relates to the field of heating characteristic testing of power equipment. The system comprises a power supply control system, an electric field regulation and control system, an environment simulation system, a discharge detection system, a three-dimensional temperature field monitoring system and a processing system. The power supply control system simulates equipment operation voltage; the electric field regulation and control system simulates a non-uniform electric field in the equipment; the environment simulation system simulates external environment conditions; the discharge detection system detects the partial discharge condition of the equipment under the simulation condition, obtains discharge parameters and transmits the discharge parameters to the processing system; the three-dimensional temperature field monitoring system monitors temperature distribution on the surface and in the equipment and transmits the temperature distribution to the processing system; and the processing system determines an association relationship between the partial discharge condition and the temperature rise based on the temperature distribution and the discharge parameters. Through cooperation of multiple systems, the influence of the external environment and internal electrical parameters on heating of the equipment is comprehensively simulated, and the heating behavior of the equipment under the actual working condition is reflected more truly, so that the accuracy of temperature rise simulation is improved.

The invention discloses an inspection device and method for an electro-optical sensor. In order to solve the problem of low data processing perfectness and accuracy in the prior art, the device comprises an electrode unit, the electrode unit specifically comprises an upper electrode plate and a lower electrode plate which are oppositely arranged in parallel, each of the upper electrode plate and the lower electrode plate comprises a circular area, and the diameter of each circular area is larger than or equal to two times of the distance between the upper electrode plate and the lower electrode plate; the distance between the upper electrode plate and the lower electrode plate is less than or equal to five times; the voltage adjusting unit is used for applying direct current or alternating current to the upper electrode plate, and an electric field is formed between the upper electrode plate and the lower electrode plate. The carrying unit places the electro-optical sensor to be detected in an electric field formed by the upper electrode plate and the lower electrode plate; and the output detection unit receives an electric field value detected by the electro-optical sensor to be detected. AC or DC uniform electric fields are provided according to different requirements, and an inspection environment is provided for the electro-optical sensor.

A method of producing a battery electrode includes applying an electrode material onto a surface of a current collector, the electrode material comprising a binder material having binder particles, initiating a drying process to dry the electrode material, and applying a non-uniform electric field to the electrode material during the drying process. The non-uniform electric field defines a magnitude gradient to generate dielectrophoretic forces on the binder particles, thereby moving the binder particles.

The application discloses an aortic valve guide wire and a use method thereof, which comprises a head section, a transition section and a support section connected in sequence along an axial direction; the head section is composed of a polymer and further comprises a deformation capsule, at least one closed unit embedded in the head section, and an internal sealing electric field sensitive viscoelastic fluid; a mesh cable is arranged on the surface of the deformation capsule and extends to the transition section; the transition section and the support section are provided with a conductive film on the surface, and the conductive film is connected with the mesh cable and used for applying a non-uniform electric field to the deformation capsule to generate a regional viscosity difference and drive the head section to bend in a direction.The electric field sensitive viscoelastic fluid built in the head section generates a regional viscosity difference under the action of the non-uniform electric field, and the difference is converted into a directional bending moment through the synergistic effect of the mesh cable and the conductive film, so that the head of the guide wire can quickly respond to an external electric signal and accurately deflect.

The invention provides a method for detecting the substitution degree of starch based on impedance and conductivity, which comprises the following steps: placing a detection cavity containing a to-be-detected modified starch suspension between two parallel detection electrode plates, contacting the to-be-detected modified starch suspension with the detection electrode plates, and placing the detection cavity and the detection electrode plates in a uniform electric field, impedance and conductance signals between the detection electrode plates under the uniform electric field are collected, and the substitution degree of the to-be-detected modified starch is obtained according to a relation among the substitution degree of the same modified starch with the known substitution degree, the suspension concentration, the impedance and the conductance. According to the method provided by the invention, simple, rapid and low-cost detection of the starch substitution degree can be realized on the basis of impedance and conductivity of the modified starch suspension, and the problems that a starch substitution degree detection method in the prior art is complicated and tedious and has relatively high requirements on instruments are solved; the detection method provided by the invention has good accuracy, is suitable for any type of modified starch with different substituent groups, and has good universality.

The embodiment of the invention provides a method for depositing an aluminum nitride film on a patterned substrate, which comprises the following steps of: performing sputtering deposition treatment by adopting a physical vapor deposition process to deposit and form the aluminum nitride film on the patterned substrate; wherein the sputtered target material is an aluminum target material, and the patterned substrate is a sapphire substrate; and keeping the patterned substrate in a grounding state in the process of performing the sputtering deposition treatment. By adopting the scheme of the embodiment of the invention, in the sputtering deposition process of the aluminum nitride film, the patterned substrate is in the grounding state, charges accumulated on the surface in the deposition process are neutralized, and the same grounding potential is integrally formed on the surface of the substrate; therefore, the problem that the motion trail, the collision behavior, the adsorption characteristic and the deposition process of the aluminum atoms are affected by a non-uniform electric field formed on the surface of the substrate is avoided, the re-reflection stage number in the sputtering process is increased, the overall coverage uniformity of the surface is improved, and the step coverage rate is increased.

The embodiment of the invention discloses environment-friendly gas insulation alternating current metal closed looped network switch equipment which comprises a gas box, an instrument chamber, a mechanism chamber and a cable chamber, a three-position disconnecting switch, a copper bar, a copper bar, a wire outlet sleeve and a circuit breaker are arranged in the gas box, and the gas box is filled with dry gas. The connection part of the copper bar and the circuit breaker, the isolation knife of the three-position isolation switch, and the connection part of the copper bar and the lower outgoing line sleeve and the three-position isolation switch are respectively provided with a compression ring, and the surface of the compression ring is provided with a vulcanization layer. Through the design of the compression ring, the electrode shape is optimized, the electric field intensity is reduced, the uneven electric field of the electrode is avoided, the electric field distribution is improved, and the partial discharge is strictly controlled, so that the electric field distribution is optimized, the phase spacing and the ground spacing are reduced, and the volume of the gas tank is effectively reduced on the premise that the performance is not influenced.

The present invention discloses a phase-splitting environmentally friendly gas ring network cabinet, comprising a cabinet body, on which a three-phase upper incoming line, a three-phase lower outgoing line, and a three-phase grounding bar are arranged. A three-position circuit breaker and an isolating switch are installed in the cabinet body, and the movable contact rod of the isolating switch is respectively rotated to a closing position in contact with the upper incoming line, a grounding position in contact with the grounding bar, and an isolating position between the upper incoming line and the grounding bar; the circuit breaker comprises an insulating cover, a support, a static contact, a vacuum interrupter, a circuit breaker main shaft, and a top rod. The switch shafts of the circuit breaker and the isolating switch are metal shafts, and the three phases are separated from each other and directly connected without insulating material. The three phases are connected through a grounded metal shaft. Through the above-mentioned method, the present invention has a phase-splitting arrangement, each phase is insulated from the ground, and only a breakdown to the ground occurs. The overcurrent and quick-break of the relay can quickly play a protective role, reducing the time and scope of power outages. The uniform electric field design effectively avoids the concentration of the electric field at the tip part and controls partial discharge.

The invention discloses a drop-out blocker with a coaxial Z-shaped alternate connection structure, and relates to the technical field of high-voltage current-limiting fuses, a plurality of annular capacitor modules are connected end to end, the annular capacitor modules at the two ends are connected with a first connector and a second connector respectively, a transition connecting piece is installed between the annular capacitor modules, and the transition connecting piece is connected with the annular capacitor modules. The annular capacitor modules are electrically connected, a layer of cylindrical insulating shell is poured on the outer side walls of the annular capacitor modules, and the first connector and the second connector extend out of the insulating shell. The invention provides a coaxial array Z-shaped alternating series structure aiming at the core defects of uneven electric field distribution, low direct current voltage withstanding level and poor space utilization rate in the existing technology of stacking electronic components in a slender insulating shell. The objective of the invention is to solve the technical problem that high voltage resistance, uniform electric field distribution and high mechanical reliability are difficult to realize in a narrow space in the prior art.

This invention provides a microplastic particle screening and separation device and method based on photoinduced dielectrophoresis. The device comprises a photoinduced dielectrophoresis chip consisting of a first illumination region, a second illumination region, a controllable barrier block, and a microchannel layer. By applying light to different positions on the photoinduced dielectrophoresis chip, the conductivity at the illumination position changes, thereby generating a non-uniform electric field. Due to the different radii of the microplastic particles, the magnitude of the photoinduced dielectrophoretic force varies. Larger-radius microplastic particles experience a greater dielectrophoretic force and cannot pass through the illumination region, while smaller-radius microplastic particles experience a smaller dielectrophoretic force and can flow to the sample outlet. By changing the position of the controllable barrier block, the separation of microplastic particles of three different radii can be achieved. The microplastic particle screening and separation device and method based on photoinduced dielectrophoresis described in this invention can achieve the separation and screening of target microplastics of different sizes using contactless photoinduced dielectrophoresis force.

The application discloses a DNA molecule manipulation chip based on electric field and bending micro-channel coupling driving, which comprises a glass substrate and a structure layer, the structure layer is arranged on the glass substrate, at least one group of micro-fluid systems are arranged in the structure layer, two ends of the micro-fluid system are respectively communicated with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole and the liquid outlet hole are vertically arranged through the structure layer, electrodes are respectively inserted into the liquid inlet hole and the liquid outlet hole, and the electrodes are used for applying direct current voltage to generate a spatial non-uniform electric field; a control method applied to the chip comprises the following steps: chip pretreatment, application of driving electric field, DNA molecule acceleration and polarization, DNA molecule positive dielectrophoresis focusing and migration; the application realizes high-efficiency mechanical-free focusing of the DNA molecules, and greatly improves the precision of subsequent optical detection and separation.

The invention provides a Kelvin drip generator corona discharge enhancement-based friction nanometer generator and a preparation method thereof. Wherein the generator comprises a Kelvin water dripping machine, high voltages at two ends of the Kelvin water dripping machine are respectively coupled to a back gate electrode and a suspension needle, a non-uniform electric field is constructed in a needle tip-FEP area, corona discharge is triggered, charges are directionally injected into an FEP / liquid drop system, and the FEP / liquid drop system is charged. The injected charges are connected in parallel into the device through a multi-branch capacitor network formed by the back gate electrode, the upper electrode / the lower electrode and the FEP. According to the invention, through cooperation of exogenous pumping and liquid drop charge shuttling (DSG), single-drop transfer charge and open-circuit voltage are significantly improved, and direct-current stepped accumulative output is maintained.

The invention discloses a split winding uniform electric field structure and a using method, and relates to the field of high-voltage transformer insulation design, the uniform electric field structure comprises a low-voltage U-shaped coil, a high-voltage coil and an electrostatic ring, the low-voltage U-shaped coil surrounds the outer side of an iron core in a split mode in the axial direction of the iron core, and the high-voltage coil is wound around the electrostatic ring. The high-voltage coil is arranged on the outer side of the low-voltage U-shaped coil, a hollow part is formed at the split part of the low-voltage U-shaped coil, and the electrostatic ring is arranged at the hollow part. The problem that the maximum field intensity and the average field intensity between the windings cannot be reduced while the insulation distance between the windings is reduced in the prior art can be solved.

The invention discloses a liquid crystal light deflector and a driving method of the liquid crystal light deflector. The liquid crystal light deflector comprises a liquid crystal light deflection panel and a controller. The liquid crystal light deflection panel includes a liquid crystal and an electrode that applies an electric field to the liquid crystal. The controller applies a predetermined electric field to the liquid crystals for driving the liquid crystals in a direction orthogonal to an initial alignment direction of the liquid crystals, thereby converting the liquid crystal light deflection panel to a first state causing deflection. The controller applies a uniform electric field to the liquid crystals for driving at least some of the liquid crystals in a direction orthogonal to the initial alignment direction, thereby transitioning the liquid crystal light deflection panel from the first state to a second state without causing deflection.

The invention relates to the technical field of fire detection, and discloses a multi-sensor pyrolysis particle fire detection control system and device, and the system comprises a power supply and signal coupling module, a dielectrophoresis modulation detection cavity module, a multi-dimensional environment sensing module, a central processing unit and an execution module. The power supply and signal coupling module extracts a high-frequency conducted interference signal of a power supply circuit and generates a high-voltage driving signal and a reference signal respectively; the dielectrophoresis modulation detection cavity module is used for establishing a non-uniform electric field by utilizing a high-voltage driving signal and carrying out dielectrophoresis modulation on aerosol particles passing through a detection area; the central processing unit synchronously collects the photoelectric detection signal and the reference signal, and determines the fire state by calculating a cross correlation coefficient. The device integrates the modules in a shell. According to the invention, physical and signal correlation between power supply noise and particle concentration change is established, electrical fire pyrolysis particles and environmental dust are effectively distinguished, and high-sensitivity early detection of electrical fire is realized.

The invention discloses a method for quickly removing bubbles in a porous medium based on electric field regulation and control, which comprises the following steps: arranging an electrode in a mold, and applying a non-uniform electric field to a porous medium flow field containing bubbles through the electrode in a resin impregnation process; based on a non-uniform electric field, dielectrophoretic force is induced to be generated at an interface of fluid-bubble-porous medium; through dielectrophoretic force, the bubble form is regulated and controlled, and the bubbles are driven to accelerate directional migration, so that the bubbles escape from the porous medium. According to the method, the limitation that a traditional bubble removal method mainly depends on pressure gradient and capillary force passive gaming is overcome, efficient, accurate and active regulation and control and rapid removal of the tiny bubbles in the porous medium are achieved, and the porosity of the composite material is effectively reduced.

This invention discloses an optimized electric field structure for a 12kV medium-voltage environmentally friendly gas C-GIS switchgear, comprising a switchgear busbar compartment, a three-position switch housed therein, three equally spaced incoming and outgoing bushings, and connected three-phase busbars. Specifically: the C-phase busbar is sequentially connected by a first lower vertical section, a first inclined section tilting to the left, and a first left horizontal section; the B-phase busbar is directly connected by a second lower vertical section to a second left horizontal section; the A-phase busbar is sequentially connected by a third lower vertical section, a second inclined section tilting to the right, and a first right horizontal section; the radius of curvature of the edge rounded corners of the horizontal sections of each phase busbar is 20mm; the bending angle between the inclined and horizontal sections of phase A is 130°, phase C is 140°, and the bending angle between the lower vertical and horizontal sections of phase B is 90°; the spacing between the three-phase busbars is 90mm. This invention can reduce the maximum electric field intensity in the busbar compartment, achieve a uniform electric field distribution, prevent partial discharge, and significantly improve the insulation reliability and safety of the switchgear.

The invention belongs to the technical field of underground hydrogen storage engineering, and particularly discloses an electric field enhanced underground hydrogen storage system and method. The method is used for solving the problems of low injection-production efficiency and small hydrogen storage capacity of a conventional injection-production mode in the current underground hydrogen storage project. Comprising an injection-production well, a first electrode column module and a second electrode column module, the injection-production well is used for injection and production of hydrogen, the first electrode column module represents one electrode of an electric field, and the second electrode column module represents the other opposite electrode of the electric field; the first electrode column module and the second electrode column module are respectively provided with equal quantity of charges with different numbers and are positioned on two sides with the same distance from an injection-production well, and a non-uniform electric field is formed in a reservoir. By applying an extra electric field, hydrogen molecules are polarized, induced dipoles are generated, then under the action of the electric field, the hydrogen flowing speed is increased, the hydrogen storage capacity is increased, and the hydrogen injection and production efficiency is improved.

The utility model relates to the technical field of copper wire sheathing materials, and discloses a corrosion-resistant semi-conductive copper protection sheathing material, which comprises a semi-conductive layer, the semi-conductive layer comprises inner convex particles, the inner sides of the inner convex particles are directly contacted with copper wires inside the inner convex particles, the outer layer of the semi-conductive layer is covered with an insulating layer, the outer layer of the insulating layer is covered with a corrosion-resistant layer, and the outer layer of the corrosion-resistant layer is covered with an insulating layer. A reinforcing layer is connected in the insulating layer in a penetrating manner, the reinforcing layer comprises reinforcing wires, and the side walls of the reinforcing wires are distributed in the insulating layer. Seen from the semi-conductive layer, the semi-conductive layer is in close contact with a copper wire, so that electric field distribution is uniform, local electric field concentration is reduced, the insulating layer can effectively block current, prevent electric leakage and short circuit and guarantee electricity utilization safety, the mechanical strength of the sheathing material is greatly improved by reinforcing wires and a woven wire mesh structure in the reinforcing layer, and the structural integrity of the wire can be kept; and the protective layer in the outer sheath can resist external physical wear and impact.

The invention relates to a device and a method for efficiently purifying black phosphorus based on an electromigration separation principle. According to the method, the Coulomb force borne by black phosphorus is larger than the weak acting force combined with the impurities through the designed three-area grading electric field device by means of the conductivity difference between the black phosphorus and the impurities, the black phosphorus is separated from the impurities firstly, particles are promoted to generate different movement tracks, and therefore the purposes of separation and purification are achieved, and meanwhile the integrity of a crystal structure is maintained. The core of the device is composed of three functional areas, namely a preselection area, a main selection area and a fine selection area. The uniform electric field intensity of 15-20kV / m is adopted in the pre-selection area, so that impurities such as oxides adsorbed on the surface of the black phosphorus can be effectively removed; the gradient electric field intensity of 30-40 kV / m is adopted in the main selection area, and a parallel static magnetic field of 0.5-2 T is introduced, so that metal impurities (such as tin and bismuth) and non-metal impurities (such as red phosphorus and iodine) can be effectively removed; a uniform electric field of 25-35 kV / m is adopted in the fine selection area, trace impurity elements can be finely removed, and the purity of the finally obtained crystal is larger than 99.5%.

The application discloses a motor anti-corona material corona resistance performance test device, system and method, relates to the high-voltage motor insulation technical field, and the test device comprises a plate electrode assembly and a blade electrode, the plate electrode assembly is used for bearing a sample to be tested, and a grounding electrode is fixed to the lower surface of the plate electrode assembly; the bottom of the blade electrode has a straight line blade with a length of 50 mm+ / -0.1 mm, the main body curvature radius of the blade cross-section profile is 0.22 mm+ / -0.008 mm, the straight line blade is formed by the intersection of two inclined sides, the blade included angle is 53.14 DEG, and the corner at the length direction end has a roundness with a diameter of 3 mm+ / -0.2 mm; during the test, a uniform and spacing-adjustable discharge gap is formed between the surface of the straight line blade and the surface of the sample to be tested on the upper surface of the plate electrode assembly. The application solves the problems that the existing test device cannot simulate a real non-uniform electric field and is difficult to produce standardized corona erosion, and realizes efficient and repeatable quantitative evaluation of the corona resistance performance of the anti-corona material.

The invention relates to the technical field of insulation testing of high-voltage variable frequency motors, in particular to a testing structure and method for insulation breakdown or partial discharge of a variable frequency motor, and the structure comprises a hollow metal tube body which is wrapped by an insulating layer for insulation breakdown test or partial discharge test. A coaxial cylinder electrode structure for generating a radial uniform electric field is arranged in the middle of the metal tube body; the insulating layer is positioned on the surface of the coaxial cylinder electrode structure; a winding wire layer is arranged on the outer side of the coaxial cylinder electrode structure, the inner side of the winding wire layer makes contact with the coaxial cylinder electrode structure, and one end of the winding wire layer is led out to serve as an electrode to be connected with an external testing circuit. The two ends of the metal tube body serve as electrodes to be connected with an external test circuit. According to the invention, the electrical stress borne by insulation under the actual operation condition can be effectively simulated, and the comprehensive measurement of the insulation breakdown strength and the partial discharge characteristic can be realized. The structure is reasonable in design and convenient to manufacture, and has good repeatability and adaptability.

The application provides a microfluidic chip and a biological particle separation device based on the microfluidic chip, which comprises a main flow channel, a plurality of bypass flow channels and an electrode flow channel. The electrode flow channel is arranged on both sides of the side wall of the main flow channel and forms a plurality of electrode zones along the extension direction of the main flow channel, so as to provide a non-uniform electric field for the main flow channel; the plurality of bypass flow channels are sequentially communicated with the main flow channel along the extension direction of the main flow channel, so that the electrode zones and the bypass flow channels are alternately and spacedly arranged along the extension direction of the main flow channel. Thus, after the sample liquid is injected into the main flow channel, different target biological particles in the sample liquid can produce different lateral deviations under the dielectrophoresis force of one or more electrode zones, so that the target biological particles can flow out from the liquid outlet of the corresponding bypass flow channel or the main flow channel, and the efficient separation of biological particles of multiple sizes and types is realized.

An electron detector (22) for an electron microscope (10), which generates a primary electron beam (16) to illuminate a sample (18), has a tubular section (32) with an internal volume (34). The primary electron beam (16) can pass through the internal volume (34) to illuminate the sample (18). The electron detector (22) has a detector element (26) located outside the tubular section (32) and configured to detect electrons moving from the sample (18) in a second direction (42) opposite to the direction of the primary electron beam (16). In the second direction (42) upstream of the detector element (26), a filter grating (28) is arranged, extending in a third direction (60) perpendicular to the beam direction of the electron beam (16).The electron detector (22) has an insulator (36) that electrically isolates the filter grid (28) and the tubular section (32) from each other, so that the filter grid (28) can be at a negative electrical potential relative to the housing (24). A plurality of electrodes (48, 50, 52) made of an electrically conductive material are arranged outside the tubular section (32) and are configured to generate a predominantly homogeneous electric field (56) between the filter grid (28) and the detector element (26). The electric field (56) has equipotential lines (66) that run predominantly parallel to the filter grid (28) in the third direction (60).The electrodes (48, 50, 52) are further configured to selectively distort the electric field (56) in the region of the insulator (36) such that the equipotential lines (66) in a defined area (68) between the filter grid (28) and the detector element (26) exhibit an inhomogeneous, predominantly downward slope. The defined area (68) extends from the filter grid (28) in the second direction (42) and from the tubular section (32) in the third direction (60).

The application provides a gradient polymer electrolyte and a preparation method and a solid-state battery thereof, and particularly relates to the technical field of electrolytes. The preparation method comprises the following steps: firstly, dissolving positive and negative electrode side polymer electrolytes in organic solvents respectively, and preparing positive and negative electrode side polymer electrolyte solutions; secondly, coating the positive and negative electrode side polymer electrolyte solutions on a substrate to obtain a composite preformed film; and thirdly, placing the composite preformed film in a uniform electric field, and diffusing and drying the composite preformed film in a vacuum environment at a certain temperature, so that the gradient distribution is fully performed to obtain a gradient polymer solid-state electrolyte. The solid-state electrolyte prepared by the application can solve the interface impedance problem and improve the cycle performance of the solid-state battery.

The invention relates to the technical field of semiconductor device manufacturing, and provides a TMBS semiconductor device manufacturing method for reducing electric noise, which is characterized by comprising the following steps: selecting a semiconductor material as a TMBS substrate, and forming an oxide layer on the surface of the semiconductor substrate by using chemical vapor deposition, the position of a groove is defined on the oxide layer by using a photoetching technology, the groove is etched on the oxide layer by using a reactive ion technology, a metal MOS grid electrode is formed, the bottom oxide layer, in contact with the groove, of the metal MOS grid electrode is completely covered with a protective layer, 20%-50% of the side wall oxide layer is covered with the protective layer, a TMBS chip is arranged on the TMBS substrate, and packaging and fixing are carried out by using a packaging material. According to the invention, the bottom oxide layer and the side wall oxide layer are reasonably covered by the protective layer, the electric field distribution is optimized, and the noise caused by a non-uniform electric field in the manufacturing process of the TMBS semiconductor device is reduced.

An electrode apparatus and method remove a polarized molecule in a fluid. In another aspect, a non-uniform electric field is created between an anode and a cathode, the fluid flows within a gap between the cathode and the anode, and the polarized molecule is driven by an electrostatic force to and adsorbed on the anode without experiencing a chemical reaction.

The invention provides a device and method for measuring the diffusion coefficient of nuclide in a rock matrix based on electric field acceleration, and relates to the technical field of nuclear waste geological disposal safety evaluation.The device comprises a sample chamber used for containing a rock sample to be measured; the electric field generating unit is connected to the sample chamber and is used for generating a uniform electric field in the sample chamber, and the concentration monitoring unit is used for collecting experimental data; and the data acquisition and processing unit is connected with the concentration monitoring unit and is used for acquiring the experimental data acquired by the concentration monitoring unit, processing and analyzing the experimental data and calculating the diffusion coefficient of the nuclide in the rock matrix. According to the device and the method, an electric field driving mechanism is introduced on the basis of a penetration diffusion experiment, so that the diffusion coefficient of nuclide in a rock matrix is rapidly determined. The invention aims to greatly shorten the experimental period, improve the efficiency and accuracy of nuclide migration behavior research, and provide important technical support for safety assessment of high-level radioactive waste geological disposal.

The ignition needle device comprises an ignition needle, a fire cover and an electric field guiding component, the ignition needle comprises a discharging end, the fire cover comprises a protruding edge used for receiving discharging of the discharging end, and the electric field guiding component comprises a tip end close to the protruding edge. The included angle between a first connecting line between the protruding edge and the discharging end and a second connecting line between the protruding edge and the tip end is smaller than 90 degrees, and the electric field guiding component is used for turbulent flow so that a non-uniform electric field can be formed between the discharging end and the protruding edge. The burner comprises the ignition needle device. According to the ignition needle device, the electric field guiding component is arranged, so that the auxiliary electric field is formed between the discharging end of the ignition needle and the electric field guiding component, and the auxiliary electric field is overlapped with the main electric field between the discharging end and the fire cover convex edge, so that the non-uniform degree of the main electric field is increased; when the non-uniformity degree of the electric field is increased, the local electric field intensity can be remarkably increased, so that gas is broken down, and the ignition success rate is increased.