35 results about "Radio-frequency induction" patented technology

The utility model provides an isolation structure and a chemical vapor deposition device, the isolation structure is arranged in a reaction cavity of the vapor deposition device, a heating device is arranged in the reaction cavity, the reaction cavity comprises a first annular cover, a second annular cover and a third annular cover, the first annular cover comprises a first space used for accommodating the heating device, and the second annular cover comprises a second space used for accommodating the heating device; the second annular cover is arranged on the first annular cover in a sleeving manner; the ring width of the second annular cover is larger than that of the first annular cover, so that a cavity is formed between the first annular cover and the second annular cover. The isolation structure blocks a flowing path of reaction gas in the reaction cavity, and corrosion of the reaction gas to the radio frequency induction coil and the bottom wall of the reaction cavity is reduced; and meanwhile, the radiation heat dissipation of the wafer tray on the radio frequency induction coil is isolated, so that the temperature influence of thermal radiation on the radio frequency induction coil is weakened, and the uniformity of thin film deposition is improved.

The invention relates to the field of intelligent card punching and scoring, and discloses a high-altitude exploration card punching and scoring system based on NFC radio frequency and somatosensory interaction, and the system comprises a path and node configuration module which is used for setting NFC card punching nodes in a high-altitude exploration path and setting path parameters; the user identification and clock-in trigger module identifies the bracelet through NFC, records clock-in time and triggers a clock-in signal; the somatosensory action recognition module collects somatosensory data at the clock-in node and calculates an action score according to the path parameters; the clock-in event generation and authentication module generates a unique clock-in token; the integral calculation and path tracking module calculates single node scores and summarizes total scores; and the communication and data uploading module uploads the total score and the clock-in token to a server. According to the invention, the card punching nodes and the NFC radio frequency inductor are integrally arranged, and a body feeling triggering time sequence and standard action template comparison mechanism is combined, so that the technical effects that the card punching behavior is credible and verifiable and the action performance is automatically scored are achieved.

The invention discloses a self-repairing radio frequency induction washing label thermal transfer ribbon based on a silver nanowire / polyurethane microcapsule composite structure, the thermal transfer ribbon is composed of a base film, a back coating layer and a thermal transfer printing layer, the back coating layer and the thermal transfer printing layer are respectively coated on two sides of the base film, and the thermal transfer printing layer is a gradient conductive-self-repairing ink layer. The composite material is mainly prepared from silver nanowires (the diameter is 25-30 nm, the length-diameter ratio is 500-800, and the resistivity is 1.5-2.0 * 10 omega.m) coated with polydopamine, polyurethane microcapsules, an epoxy acrylate prepolymer, carbon black and the like according to a specific proportion, wherein the silver nanowires (the diameter is 25-30 nm, the length-diameter ratio is 500-800, and the resistivity is 1.5-2.0 * 10 omega.m). Through the synergistic enhancement effect of the silver nanowires and the polyurethane microcapsules, the problems that a traditional thermal transfer ribbon is prone to being blurred and a conductive network is fractured during printing under repeated bending are solved, after the ink layer is bent for 1000 times, a printed pattern can still rapidly recover the initial integrity, high conductivity and environmental adaptability are achieved, and the thermal transfer ribbon can be widely applied to the field of thermal transfer printing. The method is suitable for flexible electronic identification systems of intelligent textiles and the like, and has good popularization and application values.

The utility model provides a UKey key management device which adopts a non-contact radio frequency technology to carry out intelligent management on access information of keys. Comprising a box body and a control module arranged in the box body, the box body is divided into an operation area and a storage area, the operation area is provided with a display module and an input keyboard which are electrically connected with the control module, and a box door is hinged to one side of the storage area; a plurality of rows of plug-in type storage assemblies, a card storage bag and an electromagnetic door lock which is matched with the box door and electrically connected with the control module are sequentially arranged in the storage area from top to bottom, and an infrared detection module and a non-contact radio frequency induction module which are electrically connected with the control module are further arranged in the storage area. The control module is electrically connected with an authorization module matched with the electromagnetic door lock. The key management system is applicable to the technical field of key management.

The invention discloses a preparation method of high-purity refractory metal spherical powder, which comprises the following steps: preparing high-purity refractory metal of which the initial shape is a block, cleaning and drying the refractory metal, smelting the refractory metal into alloy metal liquid, carrying out vacuum suction casting on the molten metal liquid, pouring a material into cooling water after suction casting is completed, and carrying out ingot casting and cooling, so as to obtain the high-purity refractory metal spherical powder. After the cast ingot is cooled, a metal bar is obtained, and finally the metal bar forms refractory alloy powder; the prepared powder is sprayed out through smelting atomization equipment, refractory alloy powder is put into a radio frequency induction plasma device, technological parameters are adjusted, and spherical powder is obtained; oxidation and impurity introduction of powder in the machining process can be effectively reduced through the radio frequency induction plasma device; when the refractory metal spherical powder is prepared, melting or spheroidizing can be achieved only when the metal powder reaches the specific temperature, the metal material can be rapidly and evenly heated through the high-frequency magnetic field effect of radio frequency induction heating, and temperature fluctuation is reduced.

This invention discloses a preparation process for high-carbon ferrochrome based on plasma spheroidization technology, belonging to the field of powder metallurgy. The process involves crushing and ball milling high-carbon ferrochrome blocks to obtain pre-formed powder, adding tannic acid, urea, nickel acetate tetrahydrate, and citric acid for coating, followed by spray drying. After pre-reduction carbonization in an argon-hydrogen atmosphere, the powder is then spheroidized using a radio frequency inductively coupled plasma torch. In-situ nanostructure growth is achieved in a mixed atmosphere of argon, hydrogen, and acetylene. Nickel acetate is reduced to catalytically active elemental nickel nanoparticles under the action of hydrogen and carbon monoxide. The powder is then cooled, graded, and inertly encapsulated to obtain a high-sphericity, low-oxygen-content, high-carbon ferrochrome-based core-shell structured spherical powder. The process flow of this invention is continuous and controllable, effectively improving powder flowability, bulk density, hardness, and corrosion resistance, and is applicable to additive manufacturing, thermal spraying, and powder metallurgy forming.

The application provides a device and method of fusing radar radio frequency induction and heterogeneous interface coupling technology, through an electromagnetic super surface pattern array antenna with metal characteristics on the inner surface of the heterogeneous interface, a fixed module is bonded around the electromagnetic super surface pattern array antenna, the fixed module and the electromagnetic super surface pattern array antenna jointly form a closed electromagnetic wave resonance cavity region, a high polymer medium material for radiating and conducting electromagnetic waves is built-in, and a radar radio frequency induction control system; electromagnetic waves emitted by a radar microstrip antenna are repeatedly reflected, superimposed and enhanced in the electromagnetic wave resonance cavity region through the high polymer medium material, and then radiated to an external space induction area of the heterogeneous interface through the electromagnetic super surface pattern array antenna, so that activities or micro-motion targets in the induction area range are detected, and a double threshold control logic output control instruction is adopted to improve the induction and control precision of the radar induction system.

The invention provides a preparation method of refractory multi-principal-element alloy powder reinforced by a complex-component ceramic phase, and relates to the technical field of refractory multi-principal-element alloy powder preparation. The method comprises the following steps that refractory metal powder and non-metal powder are added into a solvent and a binder, the mixture is put into a mechanical stirring device to be stirred, and a slurry suspension solution is obtained; micron-sized spherical powder aggregates are prepared through a spray granulation method; a radio frequency induction plasma spheroidizing mode is adopted for preparing refractory multi-principal-element alloy spherical powder reinforced by a complex-component ceramic phase; the preparation method further comprises the step of obtaining the refractory multi-principal-element alloy powder reinforced by the irregular-shaped complex-component ceramic phase in a ball milling mode. The prepared complex-component ceramic phase reinforced refractory multi-principal-element alloy is uniform in component, compact in structure, low in impurity content and controllable in particle size distribution, and the preparation method is simple, easy to operate, environmentally friendly, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.

The application provides a semiconductor cleaning device and a cleaning method, which comprise a rack, a process tube, a fixing support, a radio frequency induction coil and a driving device. The process tube has a cavity inside, and the cavity is used for accommodating a graphite boat to be cleaned. The fixing support is connected with the rack and is movable relative to the rack. The radio frequency induction coil is arranged around the outer periphery of the process tube, and each turn of the radio frequency induction coil is fixed on the fixing support. The radio frequency induction coil is used for forming a plasma of a process gas in the process tube. The driving device is used for driving the fixing support to move in a first direction, so as to drive the radio frequency induction coil to move in the first direction relative to the process tube. The first direction is parallel to the length direction of the process tube. The graphite boat is cleaned by using the semiconductor cleaning device. The radio frequency induction coil surrounds part of the process tube, so that the graphite boat is cleaned in sections, and the cleaning time is short.

The application discloses a radio frequency linear plasma device and application thereof in vanadium-titanium magnetite smelting, and the device comprises an outer shell, a discharge chamber arranged in the outer shell, a neutralizer arranged at the top end of the outer shell, a radio frequency induction coil arranged in the outer shell and a heat exchange coil; the outer shell is provided with an air inlet joint and an air outlet joint; the bottom end of the discharge chamber is communicated with the air inlet joint, the top end of the discharge chamber is provided with a high-temperature-resistant pipe clamped with the air outlet joint, the neutralizer is communicated with the air outlet joint, the radio frequency induction coil is sleeved outside the discharge chamber, and the outer shell is provided with a radio frequency input joint connected with the radio frequency induction coil; the device has a reasonable structure design, adopts a ring-shaped radio frequency induction coil to replace a traditional induction electrode, can generate high-density plasma under a lower radio frequency voltage, greatly reduces energy consumption during device operation, and promotes efficient smelting of vanadium-titanium magnetite through the formed ring-shaped plasma, thereby obviously improving the content of titanium dioxide in smelted products, and thus has good market competitiveness.

The invention discloses a passive NFC (Near Field Communication) device and a passive ink screen. The device comprises an NFC antenna, an NFC wireless communication module, a high-speed wireless communication module and an energy acquisition module, the NFC wireless communication module comprises a resonance module and an NFC controller; the NFC antenna is used for sensing an NFC radio frequency field, generating radio frequency induction voltage and realizing NFC communication and NFC energy receiving; the resonance module and an input capacitor controlled by NFC resonate at an NFC carrier working frequency; the NFC controller is used for establishing communication with the NFC reader-writer and starting the high-speed wireless communication module and the energy acquisition module after the communication is established; the high-speed wireless communication module is used for establishing wireless communication connection with the NFC reader-writer after being started to perform data exchange; and the energy acquisition module is used for acquiring and storing energy from the NFC antenna and supplying power to the high-speed wireless communication module. The passive NFC device can achieve high-speed wireless communication with an external NFC reader-writer, and the user experience effect is improved.

The invention belongs to the technical field of functional food, and particularly relates to plant silicon water capable of improving atherosclerosis and a preparation method of the plant silicon water. The method comprises the following steps: S1, mixing silicon tetrachloride, high-purity oxygen and hydrogen to obtain mixed gas; s2, introducing the mixed gas into a radio frequency induction plasma torch to generate silicon-containing gas; s3, the silicon-containing gas is subjected to temperature programming, purging and deacidification under nitrogen carrier flow, and a silicon gas-phase product is obtained; and S4, performing feedback control. The radio frequency induction plasma torch is adopted for high-temperature pyrolysis, and it is ensured that silicon tetrachloride is completely decomposed to generate high-activity silicon-containing gas. The sodium citrate solution is used for dissolution and synchronous surface modification, and the strong coordination capability of citrate radicals is used for stabilizing silicon hydroxyl, so that the product is endowed with stable electronegativity. And in combination with a feedback regulation mechanism of online component and potential monitoring, accurate control of key quality attributes of a final product is realized, and the product consistency is ensured.

The application provides a preparation method of a two-phase high-entropy ceramic powder and coating. The preparation method first prepares a micro-sized spherical two-phase high-entropy ceramic powder through a spray granulation method; a high-density, high-fluidity, high-bulk-density high-quality standard spherical two-phase high-entropy ceramic powder is prepared by using a radio frequency induction plasma spheroidization method, and the powder has a face-centered cubic crystal structure and a body-centered cubic crystal structure. A two-phase high-entropy ceramic coating is prepared on the surface of a substrate by using a supersonic plasma spraying technology. The coating prepared by the application has excellent phase stability and oxidation resistance and ablation resistance, and can withstand more than 120 seconds of super-high-temperature heat protection in an electric arc plasma ablation process at 1800 DEG C.

The present application relates to battery processing and manufacturing technology field, provide a kind of transverse magnetic flux radio frequency induction heating battery pole piece blank area wrinkle removal method, megahertz level radio frequency signal is output by radio frequency power supply, after impedance matching, lossless feed into transverse magnetic flux inductor, generate transverse magnetic force line to make eddy current closed in battery pole piece plane. Again with active water-cooling magnetic flux shield plate generates reverse magnetic field shielding magnetic flux, and through built-in water-cooling channel and timely heat dissipation. While by supporting support roller keeps inductor and pole piece gap constant, cooperate temperature sensor closed loop temperature control and heat to softening state, by production line winding mechanism drive plastic extension of softening zone, finally through frozen roll quenching, overall complete battery pole piece complete heat treatment process. The present application also provides a kind of device, the method and device realize ultra-thin battery pole piece effective induction heating and online annealing. Both can efficiently eliminate pole piece processing residual stress, smooth wrinkle defect, and whole process without damaging coating structure, no powder crack problem.

This invention relates to the field of new energy vehicle charging technology, specifically to an inductive authorization-based plug-and-charge home AC charging pile and its control method. The core solution involves constructing multiple security gating mechanisms through radio frequency induction identity verification, multi-coil parking space boundary determination, gun trajectory closed-loop verification, and PE physical presence proof, enabling safe and convenient plug-and-charge functionality for home charging piles. The method covers establishing a safe default state upon power-on, vehicle and parking space parameter calibration in binding mode, standby pre-authorization session management, spatial closed-loop verification during gun insertion, physical proof of grounding link, multi-condition linkage main circuit control, and full-cycle verification of charging. This invention requires no additional network or manual operation, effectively solving safety hazards such as accidental authorization triggering, cross-parking space charging, and grounding failure in home scenarios, and is suitable for home charging needs in private parking spaces.

The invention discloses an industrial operation permission electronic signature method and system based on multiple verification and process management and control, and belongs to the technical field of industrial safety management and information safety. The method comprises the following steps: a server generates a dynamic token containing a session context and an anti-replay random number (Non) in a specific link according to a job permission process; the signer mobile terminal obtains the token through optical scanning, radio frequency induction or sound wave receiving and the like; triggering local biological feature authentication after successful analysis, wherein a feature acquisition interface or logic of the mobile terminal for generating a device fingerprint is in a default limited state; in response to the fact that the biometric authentication is passed and an internal authorization signal is received, the mobile terminal switches a feature collection interface to a non-limited state, calls the interface to collect hardware feature data of the current device to generate a device fingerprint, and integrates the identity information to generate signature data; and after receiving the data, the server verifies the validity of the random number and the consistency of the device fingerprints, and dynamically verifies the authority according to the context information. The invention further comprises a mechanism for automatically switching sound wave transmission based on environment perception. Malicious programs are prevented from collecting fingerprints through sequential control of a bottom layer interface, the problem of industrial limited space communication is solved through sound wave transmission, and replay prevention and unauthorized prevention are achieved in combination with a process context.

The invention discloses a plasma powder spheroidizing device based on fluidized bed powder feeding and a control method.The plasma powder spheroidizing device based on fluidized bed powder feeding comprises a fluidization bin and a radio frequency induction plasma torch, the fluidization bin is externally connected with a powder feeding gas source, and a perforated plate and a powder feeding pipe are arranged in the fluidization bin; the interior of the fluidization bin is divided into an upper space and a lower space by the porous plate; the powder feeding pipe penetrates through the perforated plate and the bottom wall of the fluidization bin; the powder feeding pipe is connected with a powder inlet branch pipe, the caliber of the powder inlet branch pipe is larger than that of the powder feeding pipe, and the top end of the powder feeding pipe is plugged with a filter element. The fluidization bin is connected with a first return pipe, the first return pipe is communicated with the air supply pipeline, and a filter element is plugged in the first return pipe; and the powder feeding pipe is used for feeding powder below the radio frequency induction plasma torch. The problem that powder is prone to agglomeration in a traditional powder conveying method can be solved, the spheroidizing effect is improved, and the requirement for the fluidity of raw material powder is lower; and meanwhile, the pain point that a ceramic tube of a plasma torch in a traditional method is easy to stick powder and crack can be overcome.

The invention relates to an optical fiber connector, an optical fiber adapter and an optical fiber connector assembly, the optical fiber connector comprises a connector main body, the connector main body is provided with a first miniature cavity, and a radio frequency identification light-emitting module or a radio frequency identification photosensitive module is embedded in the first miniature cavity; the radio frequency identification light-emitting module is configured to be driven to be lightened by utilizing radio frequency induction energy, and the radio frequency identification photosensitive module is configured to supply power to the radio frequency identification photosensitive module after receiving an optical signal, so that the radio frequency identification photosensitive module can be identified by external radio frequency induction equipment. According to the method and the device, port-level refined identification can be realized, identification in a photographing mode is not needed, and the technical problems of unstable identification accuracy and relatively low operation and maintenance efficiency in related technologies are solved.

This invention discloses a method for preparing ultra-high purity vanadium single crystals using the cold crucible pulling method, comprising: raw material pretreatment, acid washing with a mixed acid solution of HNO3:HF:H2O=(2-4):(0.5-1.5):(8-12), and then... ‑5 Degassing at 800-900℃ under vacuum; smelting and refining: the raw material is placed in a water-cooled copper crucible with a 50-200μm thick yttrium-stabilized zirconium oxide or hafnium oxide coating, and smelted at ≤5×10⁻⁶ ℃. ‑5 Under vacuum and ≥6N ultra-high purity argon gas protection, melting is achieved through 15-25kHz radio frequency induction heating, followed by electron beam or laser scanning refining for 3-8 minutes; crystal lead-in and necking growth are then performed using… <100> or <110> Crystal orientation seed crystal, necking diameter 3-5mm, length ≥20mm; shoulder formation and constant diameter growth, pulling speed 2-10mm / h, rotation speed 5-15rpm, closed-loop diameter control, axial temperature gradient 10-30℃ / cm; tailing and cooling, programmed cooling at ≥50℃ / h. The vanadium single crystal prepared by this invention has a purity ≥99.9995%, total interstitial atoms ≤10wppm, and dislocation density ≤10 3 cm ‑2 With a diameter of 20-80mm and a length of 100-200mm, it can be applied to the fields of semiconductor devices, superconducting devices, or quantum computing devices.

The invention discloses a warehouse management system based on ultrahigh frequency radio frequency induction, and belongs to the field of material management. Comprising a goods allocation electronic tag system, a tray electronic tag system, a single goods electronic tag, a warehouse doorway / channel radio frequency induction system and a radio frequency induction handheld terminal inventory system. An electronic tag is installed on each goods allocation, a tray electronic tag is installed on each tray, an electronic tag is installed on each single goods, a radio frequency induction handheld terminal is used for carrying out inventory work in the inventory process through a warehouse gate / channel radio frequency induction system, and read data are sent to a background server for processing. Through automatic and intelligent management, human errors and loss are reduced, the warehouse operation efficiency is improved, the operation cost is reduced, real-time and accurate inventory data support is achieved, and a powerful basis is provided for enterprise decision making; and full-chain tracking and visual management of the articles from warehousing to ex-warehouse are realized.

The invention discloses a safety door lock which is composed of a door lock sensor and a protective door operating piece. One base station chip is used for controlling time division multiplexing of the two RFID antennas, closing of the protective door is achieved, the position of a lock tongue of the protective door is detected at the same time, closing of the protective door is detected, after the lock tongue is inserted into the accurate position, an electromagnet is driven, and the electromagnet drives a lock catch to lock the lock tongue. And meanwhile, the position of an electromagnet push rod is detected through a groove type photoelectric switch, closed-loop detection is achieved, and therefore the high safety level of the locking function is achieved. In conclusion, the detection of the protective door and the lock tongue can reach a higher safety level, the cost can be effectively saved, and mutual interference is avoided.

The invention relates to a radio frequency plasma-high frequency inductance composite gas atomization powder making device and method, and the device comprises an atomizing nozzle which is provided with a nozzle center hole; an opening is formed in one end of the restraining structure, the opening end is inserted into the nozzle center hole, and a gas inlet used for introducing plasma gas is formed in the side wall of the restraining structure; the high-frequency induction coil is arranged in the restraint structure and used for being arranged outside the alloy material in a sleeving mode and enabling the alloy material to be melted at a high temperature; the radio frequency plasma generator is arranged in the restraint structure and is arranged below the high-frequency induction coil, and the position of the air inlet is higher than that of the radio frequency plasma generator; and the radio frequency induction coil is arranged outside the constraint structure in a sleeving manner and corresponds to the radio frequency plasma generator, and the radio frequency induction coil is used for exciting the plasma gas into radio frequency plasma. The method has the effect of reducing the powder granularity on the basis of improving the powder yield.

The invention relates to the technical field of powder spheroidizing, in particular to a conveying spheroidizing system and method for plasma spheroidizing of superfine titanium alloy powder. The invention discloses a conveying and spheroidizing system for plasma spheroidizing of superfine titanium alloy powder. The conveying and spheroidizing system comprises an in-situ activation grading device, a coaxial layered conveying device and a plasma spheroidizing device, the in-situ activation grading device comprises a sealed stock bin, a vertical shaft stirring paddle and a side shaft stirring paddle, wherein the vertical shaft stirring paddle and the side shaft stirring paddle are arranged in the stock bin. According to the conveying and spheroidizing system, low-energy-consumption and high-stability activation and conveying of superfine powder can be achieved, the defect of adhesion of coarse powder and fine powder is overcome, products controllable in particle size distribution and extremely high in sphericity degree can be obtained, adhesion and accumulation of the powder on a nozzle of the radio frequency induction plasma torch are avoided, and the service life of the powder is prolonged. The problems that energy consumption and stability of a traditional powder feeding technology are poor, coarse powder and fine powder are prone to adhesion due to mixed conveying of the coarse powder and fine powder, and powder particles are prone to adhesion and accumulation on the inner wall of a nozzle are solved.

The invention discloses a multi-role dynamic view construction method and system based on a single digital identifier, and a terminal, and relates to the technical field of Internet information display and data security. The method comprises the following steps: a server receives a request initiated by a terminal through optical scanning or radio frequency induction (such as NFC) analysis of a unique digital identifier; matching a permission matrix according to the identity credentials of the visitors; dynamically arranging a view in real time at a server, only calling component codes which the role has right to check and assembling the component codes and data based on the component dependency relationship, and blocking the issuing of underlying codes of contents which are not right to check; and finally, sending the lightweight resource packet to a terminal browser for rendering. The invention further provides an arrangement platform supporting interactive configuration and a portable display terminal. According to the method, the differentiated and safe compliant views are displayed to different users based on the same physical identifier on the premise that special client software does not need to be installed through the technologies of server code-level cutting and browser zero-residue rendering.

A method for preparing high-purity nano-tin oxide powder using radio frequency inductively coupled plasma (RFIC) involves placing tin powder with a purity of at least 99.99% and a particle size of 35-40 µm into an intermittent feeder. Plasma gas is introduced into the furnace chamber, and the RF power supply is turned on. Energy is coupled through an RF induction coil to generate an RFIC plasma arc. The tin powder is then transported to the high-temperature zone at the center of the RFIC plasma arc via a carrier gas, allowing it to completely vaporize without solid electrode contact, generating tin vapor. Oxygen is then introduced into the tin vapor zone, causing an oxidation reaction that produces tin oxide vapor. The resulting tin oxide vapor is rapidly cooled, condensing into nano-sized tin oxide particles with a purity of 99.99%. The resulting nano-tin oxide powder exhibits high purity, uniform particle size, and good dispersibility.

The utility model discloses an information acquisition circuit and a nursing practical training simulation device. The circuit comprises a control unit, a plurality of radio frequency induction units and a plurality of electronic tags. The plurality of radio frequency induction units are correspondingly arranged in a plurality of target areas on the human body model respectively, the induction range of each radio frequency induction unit corresponds to the size of the target area, and the output ends of the plurality of radio frequency induction units are connected with the input end of the control unit. The plurality of electronic tags correspond to the plurality of instruments, each electronic tag is arranged on the corresponding instrument, identity information of the corresponding instrument is stored in each electronic tag, and the radio frequency induction unit identifies and transmits the identity information stored in the electronic tag to the control unit when the corresponding instrument enters a target area.

The application discloses an embedded hidden passive NFC induction chip, a system and application thereof, and comprises a passive NFC induction chip, a micro induction antenna is fixedly installed in the passive NFC induction chip, and an embedded encapsulation protection layer is laid on the outer side of the passive NFC induction chip; the embedded encapsulation protection layer comprises a waterproof sealing layer and an epoxy resin layer; the application adopts an embedded hidden integrated structure, the passive NFC induction chip is ultrathin and miniaturized, is completely embedded in the product, has no exposed protrusion, does not change the original appearance, counterweight, hand feeling and structural strength of the product, and gives consideration to the product appearance and use comfort, and is suitable for the installation requirements of various integrated forming products; the passive NFC induction chip does not need a battery and an external power supply, relies on NFC radio frequency induction to independently take power and work, completely gives up the power supply dependence of a traditional active NFC structure, has ultralow power consumption, is free of maintenance, has an extremely low failure rate, and greatly reduces product modification and use cost.

In an embodiment, the present disclosure pertains to electric field generators that include a signal generator electrically connected to a power amplifier, a impedance matching circuit electrically connected to the power amplifier, and a power divider electrically connected to the impedance matching circuit and to at least one of a first wall, a second wall, a third wall, a fourth wall, or a base area. In an additional embodiment, the present disclosure pertains to method of determining radio frequency (RF)-induced heating on a medical device utilizing an electric field generator of the present disclosure. Additional embodiments of the present disclosure pertain to methods of making electric field generators for testing a medical device.

The application discloses a device for preparing beta-Ga2O3 crystal through precise heating, and relates to the technical field of beta-Ga2O3 crystal preparation. The device comprises a sintering furnace body, a crucible and beta-Ga2O3 crystal. The crucible is arranged in the sintering furnace body, and Ga2O3 melt is arranged in the crucible. The device further comprises a crystal growth mold connected with the crucible, a first insulation and heat insulation layer connected with the crucible, a second insulation and heat insulation layer connected with the crucible, an electromagnetic heating system arranged outside the crucible, a radio frequency induction heating system arranged outside the crucible and located at the top of the electromagnetic heating system, a slit arranged in the crystal growth mold, and a temperature sensing mechanism having one end connected with the electromagnetic heating system and the other end connected with the radio frequency induction heating system. The electromagnetic heating system and the radio frequency induction heating system are used for heating the crucible, so that the Ga2O3 melt is melted, and the beta-Ga2O3 crystal is grown on the crystal growth mold. The temperature sensing mechanism is used for accurately sensing and controlling the temperature of heating, so that the rapid and high-quality growth of the beta-Ga2O3 crystal is ensured.

A radio-frequency plasma torch is provided. The radio-frequency plasma torch comprises a torch housing with a torch channel, a dielectric sheath, an induction coil that is circumferentially disposed around the dielectric sheath, where the induction coil generates an alternating, high-gradient magnetic field, and at least one conductive rod that is connected to an external voltage source for generating a high-voltage spark discharge. The high-voltage spark discharge and the alternating, high-gradient magnetic field collectively ionize the at least one plasma forming gas for generating a flow of plasma within the torch channel. The plasma torch also includes an impeller unit that is rotatably mounted within the torch channel of the torch housing, proximate the inlet section of the torch housing, such that when the impeller unit is driven to rotate, the rotation of the turbine induces a reverse vortex flow of plasma forming gas within the torch channel.