1570 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 relates to the technical field of intelligent identification, and discloses an intelligent identification method for a geological stress concentration area. The method comprises the steps that a plurality of vector electromagnetic induction coils are arranged in a monitoring area in a latticed mode, and original electromagnetic pulse signals containing components in the X direction, the Y direction and the Z direction are collected; performing denoising and time-frequency analysis on the original electromagnetic pulse signal to obtain a multi-dimensional data cube; processing the multi-dimensional data cube by using an integer linear programming model and an adaptive fuzzy correction algorithm to obtain a corrected electromagnetic pulse signal data set; performing decomposition and mapping relation construction on the corrected electromagnetic pulse signal data set to obtain a geological stress distribution estimation value; and constructing a geological stress concentration area three-dimensional model according to the geological stress distribution estimation value. According to the method, the stress field boundary identification precision is enhanced, and the blind area is reduced, so that high-precision stress field reconstruction under complex geological conditions is realized.

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 relates to the technical field of metal pipe nondestructive testing, and discloses a method for detecting an oxide skin in a stainless steel pipe by an electromagnetic induction technology, which comprises the following steps: S1, generating multi-frequency excitation signals which comprise a high-frequency signal and a low-frequency signal which are used for respectively detecting the surface characteristics and deep distribution of the oxide skin in the stainless steel pipe; s2, applying the excitation signal to the stainless steel tube through an excitation coil, wherein the excitation coil adopts a multi-layer structure to ensure uniform distribution of a magnetic field; and S3, stainless steel pipe induction signals under the action of the excitation signals are collected, wherein the induction signals comprise response signals of the surface oxide skin and interference signals of the base body. According to the invention, the multi-frequency excitation technology is combined with signal decomposition and fusion processing, so that comprehensive detection of the thickness and distribution of the oxide skin is realized. Based on high sensitivity of high-frequency signals to surface characteristics and deep penetrability of low-frequency signals, detection results can accurately reflect characteristics and thickness distribution of the oxide skin at different depths.

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.

A steering control system for a vehicle that detects a magnetic field generated from an electromagnetic induction line and that is capable of autonomous travelling along said electromagnetic induction line, where the steering control system includes: a plurality of induction line detection sensors attached to said vehicle; and a control device that, for every control cycle and on the basis of a deviation of said vehicle from said electromagnetic induction line calculated from detection data acquired by said plurality of induction line detection sensors, generates and outputs a travelling control signal that causes said vehicle to turn so as to cancel the deviation or causes said vehicle to advance straight forward, wherein a deviation detection reference point of said plurality of induction line detection sensors is disposed at a position separated from a pivot serving as the turning center of said vehicle.

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 the technical field of copper rod blank detection, in particular to a defect detection method and device for a copper rod blank, and the method comprises the following steps: S10, formulating a quality grade table of the copper rod blank; the copper rod blank is placed on a conveying roller way, and the conveying roller way is started; s20, the speed of a conveying roller way is adjusted, and when the copper rod blank is driven to move to the position in front of a detection area in the conveying direction, an electromagnetic rotation driving device and an electromagnetic induction detection module are started; s30, a second control unit and a second current regulator are used for controlling starting of a second electromagnetic coil, an electromagnetic sensor detects a defect signal, induced voltage is calculated, and defect information of the copper rod blank is collected; s40, calculating an intensity factor X1, a damage degree factor X2 and an influence degree factor X3 according to the defect information; the defect fraction Q of the copper rod blank is calculated according to the formula Q = W1 * X1 + W3 * X2 + W3 * X3; and rating the copper rod blank corresponding to the quality grade table. The method effectively reduces the omission ratio of the defects of the copper rod blank, and accurately recognizes the internal defects.

A first detection signal is generated based on a distance between a first detectable coil disposed on a first key and a first drive coil. A second detection signal is generated based on a distance between a second detectable coil disposed on a second key and a second drive coil. The first drive coil includes first and second drivers through which current flows in a first direction and in a second direction opposite to the first direction, respectively. The second drive coil includes third and fourth drivers through which current flows in the first direction. The first detectable coil includes first and second portions in which induction currents in opposite directions are generated by electromagnetic induction of the first drive coil. The second detectable coil includes third and fourth portions in which induction currents in the same direction are generated by electromagnetic induction of the second drive coil.

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 provides a method and a system for detecting construction flatness and compactness, which are applied to the field of measurement data processing. The compaction degree in the construction process is detected in real time on the basis of the preset electromagnetic induction sensor of the road roller, the problem that construction parameters cannot be adjusted in time by relying on sampling inspection after construction is completed in a traditional method is solved, electromagnetic parameters (such as electrical conductivity, dielectric constant and magnetic conductivity) are collected and matched with the compaction state of the construction ground, and the construction quality is improved. According to the method, the soil compaction condition is evaluated in real time, when insufficient compaction is found, the additional rolling times are automatically calculated, and the operation parameters of the road roller are dynamically adjusted according to the compaction distribution thermodynamic diagram, so that the construction precision and efficiency are improved, the condition of excessive compaction or insufficient compaction can be avoided, rework and resource waste are reduced, and the construction efficiency is improved. And real-time data feedback and automatic adjustment functions are provided, and intelligent management of the construction process is realized, so that the construction quality and the resource utilization rate are greatly improved.

To provide a generator having a highly efficient power generation, which has a rotating shaft drive unit with a novel structure in which the rotating shaft is rotated by the force of water (hydraulic force). SOLUTION: A generator main body 10 that obtains electrical energy by electromagnetic induction between a coil and a magnet has a rotating shaft 1 that drives the coil or the magnet, and a rotating shaft drive section consisting of a pair of bellows pump chambers 21, 22 and a pair of piston chambers 31, 32. Pistons 33, 34 are provided in the piston chambers, respectively, and each piston is connected to the rotating shaft 1 by crankshafts 35, 36 so that when one rises, the other falls, and the up and down movement of these pistons rotationally drives the rotating shaft.

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 relates to an aluminum bar permanent magnetic induction heating method for extruding an aluminum alloy profile, which mainly solves the problem of poor heating uniformity of an aluminum bar heated by electromagnetic induction in the prior art, and comprises the following steps of: a, placing the aluminum bar on a conveying mechanism for conveying, pushing the aluminum bar into a conveying channel of a heating mechanism through a pushing mechanism, and heating the aluminum bar in the conveying channel; the aluminum bar is arranged in a composite magnetic field generated by the permanent magnet assembly; b, a gradient magnetic field is formed through alternate arrangement of permanent magnet polarities of the permanent magnet assembly, meanwhile, the electromagnet generates a high-frequency alternating magnetic field through alternating current, eddy current is excited on the surface of the aluminum bar through the magnetic field coupling effect, conduction type heating from outside to inside is achieved, and the electromagnet is independently controlled through a sub-power source of the power source system; local magnetic field compensation is realized through independent current control, and the compensation range is + / -0.3 T; c, the temperature of the aluminum bar is detected through an infrared temperature sensor and fed back to a control system, and the distance between the permanent magnet unit and the aluminum bar is dynamically adjusted.

The invention belongs to the technical field of sewage pipeline flow detection, and particularly relates to a sewage pipeline flow calculation method based on electromagnetic induction, which comprises the following steps: step 1, a detection mechanism is arranged between two butt-joint flowing sewage pipelines, and the detection mechanism is composed of a measuring pipe, an electrode and an excitation coil, the magnet exciting coil wraps the outer arc surface of the measuring tube. The sewage pipeline flow calculation method based on electromagnetic induction is high in measurement precision and suitable for various conductive media including sewage, corrosive liquid and a mixture containing solid particles; the measuring range is wide, and the device is suitable for measuring fluids with different pipe diameters and flow ranges. The electromagnetic flowmeter can be quickly mounted on the sewage pipe through the quick clamping mechanism, so that the mounting time is shortened, the labor intensity is reduced, and maintenance and calibration are facilitated; measurement errors caused by fluid interference are avoided by reducing accumulation of sediments, and the accuracy of circulation measurement is further enhanced by circular motion measurement of the electrodes.

The invention belongs to the technical field of batteries, and particularly relates to a pole piece processing system and a pole piece processing method. The pole piece treatment system comprises an electromagnetic induction heating unit, wherein the electromagnetic induction heating unit is used for carrying out electromagnetic induction heating treatment on a pole piece. According to the present invention, the binder floating on the surface of the pole piece can be reduced, and the pores are left in the active layer, such that the porosity of the pole piece is improved, and the infiltration rate of the electrolyte on the pole piece is improved; various burrs and particles on the edge of the active layer can be improved, so that the surface of the active layer becomes smoother, the sharpness of the surface of the pole piece is reduced, and the risk that the pole piece pierces an isolating membrane is reduced. Moreover, the conductive agent in the pole piece tends to be consistent in direction under the influence of magnetic lines generated in the electromagnetic induction process, so that the diaphragm resistance of the pole piece is further reduced.

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 full-automatic coil bending equipment, which belongs to the technical field of coil bending and comprises a bending head connected with an external driving mechanism, a central column is fixedly connected to the center of the top end of the bending head, a wire passing groove is formed in the inner side of the bending head, and a guide roller for clamping and guiding a copper wire is rotatably arranged at the wire passing groove through a support. A driven counting roller is arranged on the surface of the guide roller in an engaged mode, and an electromagnetic induction heating coil used for heating the copper wire is arranged on one side of the bending head. According to the copper wire bending device, the guide roller, the driven counting roller and the electromagnetic induction heating coil are arranged, when the correlation photoelectric sensors rotate to the mutually aligned positions, the electromagnetic induction heating coil heats the bending position of a copper wire, stress generated when the copper wire is bent can be greatly reduced, the surface of the bending position becomes flat, and the bending quality of the copper wire is improved. And the coil can be better attached to the iron core, so that the mounting stability of the coil is ensured.

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 field of helicopter wing anti-icing and deicing, in particular to a helicopter anti-icing and deicing system applying rotor wing kinetic energy recovery and an operation method. The helicopter anti-icing and deicing system applying rotor wing kinetic energy recovery comprises an electric heating deicing device, a kinetic energy recovery device and a helicopter rotor wing key assembly. The electric heating deicing device is composed of a high-resistivity metal heating wire and an icing detector, and the device transfers heat to the surface of the wing for deicing through heating of the high-resistivity heating wire. The kinetic energy recovery device is composed of an electric energy rectification, voltage stabilization and energy storage device, a permanent magnet and a magnetic induction coil. Kinetic energy generated when the rotor rotates is converted into electric energy through the electromagnetic induction technology and stored in a battery pack. The helicopter rotor key assembly is composed of a helicopter blade and a helicopter swash plate and is a key component of the helicopter rotor. According to the invention, the kinetic energy of the helicopter rotor is recovered to prevent and remove ice, so that the overall energy utilization efficiency is improved, and the environmental adaptability and safety of the system are also improved.

The invention discloses a combined submarine driving device for inhibiting clearance leakage, which comprises a pump shell, a blade and a pump inlet, a circle of blade front cover plate is arranged on the periphery of the blade, the blade front cover plate is fixedly connected with the periphery of the blade, no clearance exists between the blade front cover plate and the blade, and the blade front cover plate rotates together with the blade; a gap is formed between the blade front cover plate and the pump shell in the radial direction, and a leakage flow channel is formed in the gap. A plurality of outer magnet assemblies are evenly arranged on the pump shell in the flowing direction of the leakage flow channel, a plurality of inner magnet assemblies are evenly arranged on the blade front cover plate in the flowing direction of the leakage flow channel, and the outer magnet assemblies and the inner magnet assemblies correspond to each other in position and are opposite in polarity, so that magnetic induction lines are generated. The front cover plate is additionally arranged on the impeller part, a magnetic structure is additionally arranged, the leakage flow of the submarine driving device is restrained according to the electromagnetic induction principle, the leakage amount and noise are reduced, and the efficiency and concealment of the submarine driving device are improved.

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 relates to the technical field of electrical cabinets, and discloses an electromagnetic shielding electrical cabinet with an eddy current prevention function, which comprises a cabinet body, a cabinet door is hinged to the front side surface of the cabinet body, a mounting plate is fixedly connected to the rear side surface of the inner wall of the cabinet body, and a mounting frame is fixedly connected to the front side surface of the mounting plate. According to the invention, each wire or a strand of wires is separated by the wire clamping shell, so that the wires are prevented from being wound together, electromagnetic induction generated by magnetic field overlapping is avoided, the wires are prevented from being heated by eddy current, the safety of the wires is improved, the service life of the wires is prolonged, and the wires are bent after the abutting rods abut against the wires. According to the invention, the long part of the electric wire is tightened, the long electric wire is prevented from being wound together, the applicability of the device is improved, the abutting rod is kept stable, the fixing effect of the abutting rod on the electric wire is improved, and the detection probe monitors the loosening and winding conditions of the electric wire in the moving process.

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 discloses a gas-liquid mixed transportation multiphase flowmeter, and relates to the technical field of flow measurement. The device comprises a measurement chamber, a conductive polar plate, a permanent magnet and a detection assembly. A plurality of temperature measuring sheets and a reference temperature measuring plate are arranged in the measuring chamber, the temperature is controlled by a heating wire, and the design of a temperature guide block and a heated block is combined, so that the flow velocity of fluid is accurately measured. The device converts temperature change into resistance change through mechanical displacement transmission, and further obtains flow velocity information of fluid. Through the combination of the conductive polar plate and the permanent magnet, the potential difference generated by the conductive liquid in the magnetic field is measured through electromagnetic induction, and the volume ratio of gas to liquid in the fluid is judged.

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.