1237 results about "Electromagnetic induction" patented technology

The invention relates to the field of electromagnetic induction heating, and discloses a global temperature control method for an electromagnetic induction heating system, which comprises the following steps of: acquiring a two-dimensional temperature distribution diagram of a heating area at a plurality of key moments through a multi-point infrared temperature acquisition and induction heating coil synchronous excitation mechanism; performing multi-dimensional region segmentation on the global temperature scene data set, and identifying a temperature abnormal region and a thermal diffusion path feature based on a boundary thermal gradient change rate and an energy transfer path analysis algorithm; a distributed power regulation and control method and a historical thermal field evolution rule are introduced based on the regional thermal response feature map; thermal field feedback information is collected in real time in the temperature control process, and the current global thermal field state is judged in combination with a thermal distribution stability judgment criterion; and based on the updated control parameter configuration table, in combination with the thermal performance parameters of the material and the geometric information of the workpiece, generating an operation instruction set of the heating process, and executing intelligent regulation and control. The induction heating device has the advantage of improving the induction heating quality.

The invention provides a stirring friction machining device and a welding, material adding and energy control method. The stirring friction machining device comprises a spinning sleeve and a rotation driving assembly, a rotating spinning screw is installed in the spinning sleeve, the rotation driving assembly drives the spinning screw to rotate through a cutter handle, and a stirring component is arranged at the bottom end of the spinning screw; the outer side of the spinning sleeve is coated with an electromagnetic resistance composite coil with adjustable current and frequency, a feeding port and / or a shredding port are / is formed in the side wall of the spinning sleeve, and variable magnetic field intensity is excited through the electromagnetic resistance composite coil according to the electromagnetic induction principle; according to the invention, accurate adjustment of heat input of a tool is realized by adjusting current in a staying starting stage, the problem that a feeding channel is blocked by hardening of materials after short staying during material adding or welding is solved, and composite stirring of metal in a deposition edge area is realized by adjusting the magnitude and frequency of the current as a dominant electromagnetic force. And meanwhile, the temperature distribution characteristics of the acting area are locally adjusted, the interface bonding strength is improved, and the residual stress of the additive component is relieved.

The invention discloses a motor rotating speed measuring method, system and equipment based on electromagnetic induction, and belongs to the field of motors. According to the embodiment of the invention, firstly, a magnetostriction resonance signal and an electromagnetic induction signal of a motor rotating shaft are obtained; performing frequency domain conversion on the magnetostrictive resonance signal to obtain magnetostrictive resonance frequency domain characteristics; performing frequency domain conversion on the electromagnetic induction signal to obtain electromagnetic induction frequency domain characteristics; frequency domain energy spectrum fusion reconstruction is carried out on the magnetostriction frequency domain characteristics and the electromagnetic induction frequency domain characteristics based on the frequency band matching relation between the magnetostriction frequency domain characteristics and the electromagnetic induction frequency domain characteristics, and a dual-frequency coupling energy spectrum is generated; and finally, determining the rotating speed of the motor rotating shaft according to the frequency position and amplitude distribution of the energy peak in the dual-frequency coupling energy spectrum, thereby improving the measurement precision of the rotating speed of the motor in a complex environment.

The invention discloses an intelligent electromagnetic induction heating method and system for multi-parameter collaborative frequency domain separation, and provides a synchronous parameter acquisition and frequency domain separation processing scheme for solving the problems of temperature detection lag, insufficient frequency domain interference processing and weak dynamic adaptation capability in the prior art. Transient current, voltage and change rate (a first parameter group) of an electromagnetic coil are synchronously acquired, and high-frequency fluctuation (greater than or equal to 10kHz) and low-frequency disturbance (1t, 1t) are converted into low-frequency fluctuation (greater than or equal to 10kHz) by combining environment temperature, cookware materials and user preferences (a second parameter group); 10kHz) is used for frequency spectrum separation. Phase difference features are extracted through band elimination filtering and FFT, heating priorities are corrected in combination with dynamic compensation factors, and a segmented heating curve is generated through time-frequency domain weighted fusion. And the system adjusts PWM parameters in real time, and triggers adaptive protection when detecting that the phase is abnormal or the power frequency exceeds the limit. According to the method, the limitation of single-frequency-band detection is broken through, high-frequency noise suppression and low-frequency disturbance compensation are realized, and accurate temperature control of ferromagnetic / non-ferromagnetic cookware is supported.

The invention relates to the technical field of mutual inductor tests, and provides a mutual inductor test abnormal data automatic filtering analysis method and system, and the method comprises the steps: obtaining magnetic field data, electric field data and thermal field data, respectively carrying out the feature extraction and weighted fusion, and obtaining a multi-physical field fusion feature vector; constructing an electromagnetic induction chain type propagation graph, calculating the weight of an edge in the graph, constructing a magnetic flux conservation constraint graph convolutional neural network, learning propagation and evolution modes of transformer test abnormity, and obtaining a coupling abnormity feature vector; the coupling anomaly feature vectors are classified, normal data, single physical field abnormal data and multi-physical field coupling abnormal data are recognized, and corresponding data are judged as abnormal data and filtered; and carrying out physical mechanism analysis on the filtered abnormal data to obtain an abnormal detection report. According to the invention, high-precision automatic identification, filtering analysis and physical mechanism traceability diagnosis of transformer test abnormal data are realized.

The invention discloses an intelligent electromagnetic induction heating system and method based on edge calculation, and aims to realize efficient and accurate heating control through advanced technical means. According to the system, a multi-source data real-time acquisition module is integrated, and various key parameters in the heating process can be comprehensively obtained. Through the data preprocessing and feature extraction technology, the system can accurately identify the heating state, and a reliable basis is provided for subsequent control. The edge computing node serves as the core of the system, has strong real-time analysis capability, can quickly respond to changes in the heating process, and dynamically adjusts a control strategy. In addition, through an edge-cloud collaborative optimization technology, cloud resources are fully utilized, and the intelligent level of the system is further improved. The problems of feedback lag, high cloud dependence and the like in the prior art are effectively solved, the heating uniformity, the energy efficiency ratio and the abnormity recovery capability are remarkably improved, and a reliable solution is provided for the fields of industrial heating, household induction cookers and the like.

The invention relates to an active source magnetization-time domain electromagnetic induction polarization multi-parameter extraction method, and provides an active source magnetization-time domain electromagnetic induction polarization multi-parameter extraction method aiming at induction response caused by conductivity, polarization response caused by chargeable property and magnetization response caused by magnetic complex physical property in polymetallic ore detection. When the emission current is in a flat-topped stage, based on an active magnetic method, magnetic susceptibility extraction is carried out by using an Oxim method; when the emission current is in a turn-off stage, resistivity and polarization extraction is carried out by using a depth Q network method based on a time domain electromagnetic method by taking the extracted magnetic susceptibility as a constraint condition; and finally, multi-parameter extraction of resistivity, polarizability and magnetic susceptibility of the active source magnetization-time domain electromagnetic induction polarization method is realized.

The invention discloses an efficient anti-freezing and anti-blocking integrated induction heating system and method for an oil and gas pipeline, belongs to the technical field of anti-freezing and anti-blocking of oil and gas pipelines, and aims at solving the problems that in the prior art, heating efficiency is low, energy consumption is huge, heating uniformity and adaptability are poor, the system integration degree is low, and the intelligent degree is insufficient. Comprising the steps of S1, induction heating unit arrangement and power management; s2, real-time temperature monitoring and data acquisition; s3, intelligent data analysis and precise heat management; the electromagnetic induction heating principle is adopted, the induction coil directly heats the pipeline and the internal medium, heat conduction loss and heat energy radiation loss of heating modes such as traditional resistance wires and heat tracing bands are reduced, the intelligent power management module can optimize power supply and power adjustment, and the self-adaptive environment and load adjustment strategy is combined, so that the self-adaptive load adjustment is achieved. The heating power can be automatically adjusted according to the environment temperature and the pipeline load, the anti-freezing and anti-blocking effect is guaranteed, meanwhile, energy consumption is remarkably reduced, and the burden of an electric power supply system is relieved.

The invention belongs to the technical field of electromagnetic induction and friction nanometer power generation, and particularly relates to a vibration energy collector based on electromagnetic induction and friction nanometer hybrid power generation. Comprising a friction nanometer power generation unit and an electromagnetic induction unit. The friction nanometer power generation unit comprises an upper insulating support plate, a lower insulating support plate and a friction pair; the friction pair comprises an upper friction assembly and a lower friction assembly, and the upper friction assembly and the lower friction assembly trigger the contact and separation process through external vibration to achieve friction electricity generation. The electromagnetic induction unit comprises a coil, a magnet and a steel body which are sequentially nested, the coil and the magnet are fixedly connected with the upper friction assembly and the lower friction assembly respectively, the steel body is fixedly connected with the lower insulation supporting plate, the magnet and the steel body form a closed magnetic circuit, and the magnet and the coil trigger relative movement through external vibration to achieve electromagnetic power generation. The device is novel in structure and distinct in gradation, integrates a triboelectrification effect and an electromagnetic induction principle, has high-voltage output and high-current characteristics, and can efficiently realize continuous conversion from environment vibration energy to electric energy.

The invention discloses a power supply system of vehicle window glass and a vehicle, and relates to the technical field of vehicles. The power supply system comprises a wireless charging receiving coil pre-buried in vehicle window glass, a wireless charging transmitting coil installed on a vehicle to which the vehicle window glass belongs, and an integrated circuit board installed in the vehicle window glass and connected with the wireless charging receiving coil. The wireless charging transmitting coil is connected with a low-voltage power supply circuit in the vehicle; the low-voltage power supply circuit is used for providing electric energy for the wireless charging transmitting coil, so that the wireless charging transmitting coil generates a changed magnetic field and transmits the magnetic field to the wireless charging receiving coil; the wireless charging receiving coil induces a changing magnetic field through the electromagnetic induction principle and then generates induction current to charge a battery in the integrated circuit board. Electric energy wireless transmission is realized through an electromagnetic induction principle between the wireless charging transmitting coil and the receiving coil, so that the vehicle window glass can receive electric energy without physical connection, and wireless power supply of the vehicle window glass is realized.

The invention relates to the technical field of automatic welding, and discloses a micro welding seam tracking method and system based on electromagnetic induction. According to the method, a high-frequency alternating magnetic field is applied to a welding seam area through an exciting coil in the micro electromagnetic sensing core; an induction coil in the electromagnetic sensing core is used for detecting magnetic field disturbance caused by geometric shape changes of the weld groove, and induction signals are obtained; processing the induction signal through a signal processing circuit integrated in the probe, namely converting the impedance change of the coil into a voltage signal, demodulating and filtering the voltage signal, and extracting a direct-current voltage signal corresponding to the deviation of the probe relative to the central position of the welding seam; the direct-current voltage signals serve as position feedback information to be output to a welding robot control system; and the movement track of the welding robot is adjusted in real time according to the position feedback information, and welding seam tracking and path deviation correction are achieved.

The invention discloses a steel wire rope nondestructive testing method and system based on sensing and physical feature fusion, and belongs to the technical field of steel wire rope nondestructive testing. The method comprises the following steps: firstly, carrying out saturation magnetization on a steel wire rope through an axial Gaussian difference excitation probe so as to improve the signal-to-noise ratio of a defect magnetic flux leakage signal; and meanwhile, the instantaneous acceleration is synchronously acquired through the inertial measurement unit. And establishing a speed-signal model based on the law of electromagnetic induction, and performing dynamic speed compensation on the magnetic flux leakage original voltage signal. And then, quantitatively extracting characteristic parameters with clear physical significance, such as peak voltage, maximum gradient, full width at half maximum and the like, from the standardized magnetic flux leakage signal, fusing the characteristic parameters with deep characteristics extracted by the deep learning model, and inputting a fused characteristic vector into a full-connection neural network and a classifier to realize defect type identification and degree evaluation. According to the invention, high-precision and interpretable intelligent detection and residual life prediction of steel wire rope defects can be realized, the detection reliability is obviously improved, and predictive maintenance is supported.

The invention provides a diagnosis method and system suitable for magnet current in a quasi-ring symmetrical star simulator, and relates to the technical field of star simulators, and the method comprises the steps: setting a target voltage range, and finally outputting the mutual inductance coefficient, total number of turns and sectional area parameters of a coil; utilizing an electromagnetic induction conversion algorithm to generate an original measurement signal; an original measurement signal is input into an integrator through a shielded wire to obtain a proportional voltage which is strictly proportional to the current, and the proportional voltage is transmitted to a data acquisition interface; performing analog-to-digital conversion on the proportional voltage received by the acquisition interface to generate a discrete sequence, calculating a conversion coefficient by combining a target mutual inductance coefficient and a fixed time constant, and finally restoring a digital current signal; and inputting the digital current signal to an upper computer to realize dynamic waveform display, and outputting key boundary parameters to a plasma experiment module. The method has the advantages that the method can adapt to complex changes of magnet current, and enough measurement precision and response speed can be provided in a low-parameter experiment.

The invention relates to the field of electromagnetic on-line monitoring, in particular to an equipment on-line monitoring system based on electromagnetic induction self-power supply, which comprises an electromagnetic monitoring module used for carrying out a monitoring request on electromagnetic equipment, and the monitoring request comprises information of a monitoring range, a monitoring starting point, a monitoring route and a monitoring terminal point; the mobile control module is used for controlling the mobile monitoring device to carry out mobile monitoring according to the monitoring route and collecting information of the detection range, the monitoring starting point and the monitoring terminal point of the electromagnetic equipment so as to form a first signal; and the information receiving module is used for receiving the first signal acquired by the mobile monitoring device. The sensor is fixed to a nearby position of a node needing temperature measurement through the alloy belt, it is guaranteed that the temperature sensing part of the sensor makes full contact with the surface of a detected part so as to guarantee the temperature measurement effect, and it is strictly guaranteed that the electrical gap after the sensor is installed is not lower than the lowest safety gap of the corresponding voltage grade.

The utility model relates to wafer plasma surface activation equipment, and belongs to the technical field of equipment for processing semiconductor components. According to the utility model, gas molecules in the chamber are effectively excited through a high-intensity magnetic field generated by the ICP coil, so that high-density and high-activity plasma is formed; the I CP reactor is arranged on the upper side of the activation chamber, the activation chamber and the I CP reactor are isolated through the insulating ceramic isolation plate, I CP electromagnetic induction can penetrate through the isolation plate, and the isolation plate not only ensures the leakproofness of the activation chamber, but also effectively isolates the high-temperature environment of the I CP reactor. The adverse effect of the high temperature in the I CP reactor on the activation chamber is prevented; the I CP coil is arranged between the inner cylinder and the outer cylinder, the heat dissipation fan is arranged on the outer cylinder, and the heat dissipation coil pipe is arranged in the activation chamber, so that the heat dissipation effect is improved, and the temperature in the activation chamber can be effectively reduced.

The utility model discloses an electromagnetic induction heating module, heating equipment and a slab production line, and relates to the technical field of induction heating. The heating module comprises a shell, a coil, and a first magnetic conductive assembly, a second magnetic conductive assembly and a third magnetic conductive assembly which are sequentially arranged along the length direction of the coil, the first magnetic conductive assembly and the third magnetic conductive assembly respectively correspond to two side parts of a to-be-heated object, and the second magnetic conductive assembly corresponds to the middle part of the to-be-heated object; the first magnetic conductive assembly and the third magnetic conductive assembly each comprise a first magnetizer which is matched with the coil and can move up and down, and the second magnetic conductive assembly comprises a second magnetizer which is matched with the coil and is fixed. By adjusting the gap between the first magnetizer and the to-be-heated object, the heating temperature of the area corresponding to the to-be-heated object is adjusted, and the temperature uniformity of the to-be-heated object in the width direction is achieved.

The invention provides a high-adaptability rotary cutter handle self-powered device which comprises a cutter handle, a stator retainer sleeving the lower portion of the cutter handle, a bearing, a rotor core, a winding, a permanent magnet, a stator core, a self-powered circuit board, a circuit board protection cavity, an inner cylinder, an inner cylinder outer ring annular disc and a taper shank straight groove spade drill cutter bar arranged at the lower end of a cutter handle body. Self power supply of the device is realized by adopting an electromagnetic induction principle, the winding on the internal rotor and the permanent magnet of the external stator are designed to cut magnetic induction lines to generate induced electromotive force, and the rotating kinetic energy of the rotating knife handle is converted into electric energy required by the intelligent knife handle, so that power is supplied to the intelligent knife handle. The power supply management circuit is arranged inside, and rectification, filtering voltage stabilization output, overload protection and the like can be carried out on voltage. An external power source and a wire are not needed for power supply and signal transmission of the device, the cutter handle and the cutter are not damaged, and conversion from a common cutter handle to an intelligent cutter handle can be achieved.

The invention discloses a shaftless disc type turbine self-powered flow monitoring device. The device comprises a static assembly, a rotating assembly, a bearing and a data collection module which are coaxially arranged. Magnetic induction coils are distributed in the shell in the circumferential direction; the shell end cover is provided with a guide vane; the turbine comprises shaftless fluid power blades and permanent magnets which are uniformly distributed in the circumferential direction, the magnet yoke is rigidly connected with the impeller assembly, and the permanent magnets are arranged in a Halbach array; the dynamic sealing interface adopts a three-stage labyrinth sealing structure; the blade has an NACA airfoil section; the magnetic induction coil is of a three-layer close winding structure. Self-power-generation is achieved through the electromagnetic induction principle, an external power source is not needed, and cost is reduced; the shaftless design reduces mechanical faults, improves the reliability and prolongs the service life; the data processing module can realize high-precision measurement; a three-stage labyrinth sealing structure prevents fluid leakage; the optimized blade parameters adapt to fluid flow; the design of the permanent magnet assembly and the magnetic induction coil enhances the magnetic field and improves the power generation efficiency and the anti-interference capability.

The invention belongs to the technical field of vibration energy collection, and discloses a multi-dimensional vibration energy collection device integrated with a damper, which mainly utilizes the Faraday electromagnetic induction principle to realize the function of vibration power generation. When an automobile runs on a normal road, a magnetic ball in the collecting device provides an internal diffusion magnetic field, the magnetic ball irregularly vibrates in an inner cavity of a cup-shaped body, and magnetic flux changes in the moving process; the springs in the dampers surrounding the periphery of the collecting device rotate at a high speed through pawl-ratchet wheel transmission, so that induced electromotive force is generated in damper coils, and the two systems jointly complete conversion from mechanical energy to electric energy. When vibration is large under bumpy road conditions, the damper can fully play a damping role, the mechanical stress of the cup-shaped body in the vibration process is reduced, and the service life of equipment is prolonged. Through ingenious design, originally wasted vibration energy is converted into electric energy, and stable electric power support can be provided for various low-power-consumption devices.

The invention discloses a full-waveform targeted detection method for a time domain electromagnetic induction-polarization effect. The method comprises the following steps: establishing a fractional order polarization model based on geological data; full-waveform numerical simulation of multiphase polarization medium three-dimensional electromagnetic response is carried out based on a time domain finite analysis method, full-waveform characteristics of an induction-polarization symbiotic effect are analyzed, and a targeted excitation relation is constructed; a time domain electromagnetic transmitter based on full-waveform current control realizes bipolar trapezoidal wave current transmission with linear ascending and descending and controllable slope, and respectively excites an induction effect and a polarization effect of an underground medium; and after the received full-waveform data is preprocessed, parameters such as polarizability, resistivity and the like are extracted, and imaging is carried out. The full-waveform target detection of the time domain electromagnetic induction-polarization effect is realized, the detection blind area is eliminated, and the purpose of improving the detection precision and efficiency of the time domain electromagnetic method is achieved.

The invention discloses a non-stage-difference side mode system of a multi-size bridge deck slab and a self-adaptive control method of the non-stage-difference side mode system. The non-stage-difference side mode system comprises an electromagnetic locking bottom mode, a non-stage-difference side mode, an Internet of Things module, a data transmission module, a computer vision module, an intelligent decision-making module and an electromagnetic control module. Through electromagnetic induction matching between the electromagnetic locking bottom die and the step-free side die, traction, positioning and locking of the side die are achieved, so that bridge decks of multiple sizes are adapted in a step-free mode, and the flexibility of template adjustment, the production efficiency and the installation precision are improved; the self-adaptive control method comprises the steps of appearance judgment of the non-stage-difference side formwork, non-stage-difference in-place of the side formwork, electromagnetic locking of the side formwork, judgment and control of the concrete forming stage and dismantling of the non-stage-difference side formwork. Electromagnetic attraction force or electromagnetic repulsive force needed during traction, in-position and locking of the side die is determined through the neural network technology, and then the current direction and current intensity applied to all the electromagnetic induction coils are determined.

The invention discloses a device and a method for testing rock crack propagation parameters under thermal shock. The testing device comprises a base. A first abutting piece is arranged at the end of the supporting plate; the pressure applying mechanism is telescopic, and a second abutting piece is arranged at the end of the pressure applying mechanism; the heating piece comprises a first heating plate and a second heating plate, the first heating plate is provided with a first through hole for the first abutting piece to pass through, and the second heating plate is provided with a second through hole for the second abutting piece to pass through; and the coil surrounds the outer side of the heating piece, and the coil heats the heating piece through electromagnetic induction. According to the testing device, the rock sample is heated through the heating piece, and the rock sample is uniformly heated through the first heating plate and the second heating plate. Through the first abutting piece and the second abutting piece which are arranged in a staggered mode, when the pressure applying mechanism applies pressure, the rock sample can be subjected to torsional force so as to observe the crack propagation condition of the rock sample. The invention relates to the technical field of civil engineering and rock engineering.

The invention discloses a pipeline hydraulic self-energized flow monitoring device, which comprises a static part and a rotating part, and is characterized in that the static part comprises a stator, a magnetic induction coil, a flange, a fixed bracket, a turbine flowmeter, a rotary connecting device and a cap piece; the rotating component comprises a rotating wheel device, a neodymium-iron permanent magnet and a self-lubricating bearing; the rotating wheel device comprises blades and a hub body. The pipeline hydroelectric generation device and the turbine flowmeter are combined, water flows through the pipeline hydroelectric generation device to wash blades, an electromagnetic module in the device generates current through electromagnetic induction to supply the current to the turbine flowmeter and capture information, and the problem that the turbine flowmeter needs an external power source to work is effectively solved; the magnetic induction coil and the fusion rotor are fixed in the shell, absolute isolation sealing is achieved, conveyed fluid media are prevented from infiltrating a power generation equipment part, flanges are designed on the two sides of a pipeline, sealing connection with other pipelines is achieved, and equipment installation and disassembly are convenient.

The invention relates to the technical field of defect detection, and discloses an insulating sleeve defect detection method and device based on electromagnetic induction, and the method comprises the steps: employing a main detection coil to excite a composite insulating sleeve to generate an electromagnetic field, and employing an auxiliary compensation coil to receive a mixed induction signal; performing interface reflection component extraction on the mixed induction signal, and calculating a dielectric parameter value of the composite insulating sleeve; calculating an interface compensation parameter of the auxiliary compensation coil based on the dielectric parameter value; generating a compensation magnetic field opposite to an interface reflection phase by using an auxiliary compensation coil according to an interface compensation parameter, and receiving a compensated detection signal by using a main detection coil and performing phase gradient analysis to obtain a position coordinate and a size parameter of an internal defect of the composite insulating sleeve; according to the invention, hardware-level separation of electromagnetic excitation and interface compensation is realized, active inhibition of interface reflection is carried out from a signal source, and automation and intelligentization of defect detection of the composite insulating sleeve are further realized.

The invention relates to the technical field of hydrogen production, in particular to a safety explosion-proof electro connecting pressure gauge and UPS redundant power supply module and method. Comprising an anti-explosion shell, a pressure sensing assembly, a dynamic anti-explosion adjusting mechanism and a signal processing unit, the anti-explosion shell is of a double-layer arc-shaped structure, the inner layer is an anti-explosion plate made of beryllium bronze, the outer layer is a pressure dispersing layer filled with transparent epoxy resin, and the pressure sensing assembly and the dynamic anti-explosion adjusting mechanism are arranged in the anti-explosion shell. The pressure sensing assembly drives the pointer to move through elastic deformation of a spring tube and detects the position of the pointer through a non-contact electromagnetic induction device. The UPS redundant power supply module comprises at least two groups of independent UPS units, an intelligent switching controller and a load distribution module, the explosion-proof performance of the pressure detection equipment can be greatly improved, and linkage of a power supply system and pressure control is realized.

The invention relates to the technical field of plasma ignition, in particular to a split type plasma ignition device and ignition system for passivating gunpowder, which comprises an ignition tube assembly and an oscillation control assembly, the ignition tube assembly comprises an ignition tube, gunpowder and a hollow resonance coil; the oscillation control assembly comprises a coil support, an excitation coil and an oscillator circuit module. The excitation coil on the coil support is used for being matched with an insulation tube in an ignition tube in an inserted mode. An ignition pulse excites an oscillator circuit module to generate a high-frequency excitation signal, the high-frequency excitation signal is released by an excitation coil and coupled to a hollow resonance coil in an electromagnetic induction mode to form LC resonance, the LC resonance enables a discharge part to generate a high-intensity electric field, the high-intensity electric field excites plasmas on the surface of gunpowder to ignite the gunpowder, and ignition is completed. The device breaks through multiple limitations of a traditional ignition mode, and intrinsic safety and high reliability of passivation agent ignition are achieved.

The invention provides a high-efficiency electric heating system suitable for a gas-solid fluidized bed, and the system comprises the fluidized bed which is provided with a gas inlet, a gas outlet, a material inlet and a material outlet, and is internally provided with solid particles; the heat transfer assembly comprises a plurality of hollow objects arranged in the fluidized bed, and part of the solid particles are contained in the plurality of hollow objects; wherein at least a first part of the hollow object is used for being connected with a power supply end, and a second part of the hollow object is not electrified; and the first part of the hollow object is a graphite electrifying body. Through the system provided by the invention, the loss of the coil is recovered, and the effective utilization rate of electromagnetic induction heating is greatly improved.

The invention relates to a multi-physics field coupling method for a smelting process of a ferronickel heating furnace, and relates to the multi-physics field coupling method for the ferronickel heating furnace, the method comprises the following steps: establishing a ferronickel heating model, importing the ferronickel heating model into ICEM software for grid division, and finally importing a grid into FLUENT; according to the method, based on a Maxwell's equation and an Ohm's law, an electrothermal conversion algorithm, an electromagnetic induction algorithm and a multiphase heat transfer and mass transfer algorithm are compiled in combination with a user-defined function (UDF), so that a mathematical analysis model for mutual coupling of multiple physical fields, multiphase flows and furnace body thermal stress in smelting of the submerged arc furnace is established. The model is combined with a radiation model, a turbulence model, a multi-phase flow model and a static structure model, a heat and mass transfer mechanism among an electric arc, a molten pool and a furnace body is disclosed, an influence mechanism of a furnace body structure and a multi-physical field on furnace body temperature distribution is explored, and an action mechanism between the furnace body temperature and thermal stress is clarified, so that the deformation position and deformation amount of the furnace body are predicted.

The invention discloses test equipment and a test method for interaction of a melt and a nuclear power special material. The test equipment comprises a smelting chamber, a smelting container assembly, an electromagnetic and shielding control system, a gas control system, a temperature measurement system and a remote operation system, the smelting container assembly is located in the smelting chamber, the smelting container assembly is used for containing test materials including melts and nuclear power special materials, and at least part of the electromagnetic and shielding control system is located in the smelting chamber and wraps the outer side of the smelting container assembly so as to conduct electromagnetic induction heating on the melts; nuclear power special materials are shielded from electromagnetic interference; the gas control system is used for providing a gas environment for the interior of the smelting container assembly and extracting gas for filtering, discharging, collecting or analyzing, the temperature measuring system is used for measuring the temperature in the molten pool and the temperature of the nuclear power special material, and the remote operation system is used for remotely controlling the test equipment to complete test operation.

The invention discloses a forming process of a steel lining polytetrafluoroethylene concentric reducing pipe. The forming process comprises the following specific steps that S1, pretreatment is conducted, specifically, after a steel pipe is cut, laser rust removal is conducted, and primer containing a silane coupling agent is sprayed on the surface; s2, powder filling is conducted, specifically, a mold is placed in the center of the steel pipe, and then PTFE-containing powder is added into modified powder according to 1.3 times of the volume between the steel pipe and the mold; the steel pipe enters a sintering area after the temperature of the steel pipe reaches 200 DEG C in a preheating area, PTFE powder is melted at the temperature of 380 DEG C and is subjected to roll coating forming, gradient cooling is conducted in a slow cooling area at the speed of 5 DEG C / min, the temperature is stabilized at 260 DEG C, internal stress is eliminated, an electromagnetic induction coil is arranged in the preheating area, and microwave heating is adopted in a forming area; s4, static pressure forming; s5, reducing forming is carried out; and S6, post-treatment. The forming process of the steel lining PTFE concentric reducing pipe has the effects that the phenomenon that the lining layer is cracked or stripped after cooling is avoided, and the yield is increased.