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181 results about "Pulse treatment" patented technology
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Electromagnetic Pulse Therapy, often referred to as PEMFT or simply PEMF, is a treatment method that uses magnets to create pulsing, moving energy which is said to change the way the body copes with pain.
H-bridge with sensing circuit
InactiveUS6865417B2Interference with sensing is avoidedHeart defibrillatorsPulse therapyEnergy storage
In a cardioverter / defibrillator system, an electrical circuit includes an energy storage device, an output circuit for controlling delivery of pulse therapy from the energy storage device to a patient, and a sensing circuit coupled across the patient to sense the patient's heart signal. The output circuit may be in the form of an H-bridge switching circuit wherein a pair of switches of the output circuit is simultaneously turned on to discharge residual voltage across the patient that remains after delivery of pulse therapy. Thus, interference with sensing of the patient's heart signal is avoided.
Owner:CAMERON HEALTH
Pressure-pulse therapy device for treatment of deposits
A device, system and method for the generation of therapeutic acoustic shock waves for at least partially separating a deposit from a vascular structure. The shock waves may optionally be generated according to any mechanism which is known in the art, including but not limited to, spark gap technology, electromagnetic shock wave generation and piezoelectric technology for generating therapeutic pressure pulses. Examples of deposits which may be treated with the present invention include, but are not limited to, atherosclerotic plaques, any type of clot, and any type of thrombus or embolus. The vascular structure itself may be any such structure for conducting blood flow, including but not limited to arteries, veins and the aortic arch.
Owner:MEDISPEC LTD
Aed faster time to shock method and device
ActiveUS20130282072A1Reduce delaysDelay minimizationHeart defibrillatorsDiagnostic recording/measuringEcg signalControl system
An automated external defibrillator (AED) and methods for reducing the delay between termination of cardiopulmonary resuscitation (CPR) and administration of a defibrillating shock, among other disclosed apparatus and methods. In one embodiment, the AED includes an ECG sensor that obtains an ECG signal corresponding to patient heart activity and a prompting device that provides instructions regarding cardiopulmonary resuscitation. The AED also has a control system including a microprocessor programmed to run two rhythm analysis algorithms after instructions to terminate CPR. The two rhythm analysis algorithms analyze segments of the ECG signal for recognizing the presence of a shockable rhythm, with one algorithm having a delayed start relative to the other algorithm. The AED additionally includes a therapy generation circuit for treating the shockable rhythm with a defibrillation pulse in response to the control system determining the presence of a shockable rhythm.
Owner:ZOLL MEDICAL CORPORATION
Pulsed therapeutic light system and method
InactiveUS20120046653A1Surgical instrument detailsLight therapyRecovery periodVolumetric Mass Density
In one aspect, a method is disclosed of delivering therapeutic light to a treatment region to effect heating in the treatment region. The method includes providing a light emitting diode and driving the light emitting diode to generate therapeutic light during a pulse period. The method further includes directing the therapeutic light to the treatment region at an average power density of about 200 W / cm2 or more at the treatment region during the pulse period and maintaining the light emitting diode in a non-emitting state for a recovery period which is longer than the pulse period.
Owner:CYNOSURE
Dynamic real-time evaluation equipment for irreversible electroporation tissue ablation
InactiveCN109157280AAvoid stabilityAvoid problems reflecting limited ablation areaSurgical instruments for heatingMathematical modelDynamic monitoring
The invention discloses dynamic real-time evaluation equipment for irreversible electroporation tissue ablation, which utilizes an electrode in an irreversible electroporation tumor treatment primarypulse application process to detect tissue impedance spectrum changes before and after pulse treatment. As that instability of the impedance spectrum signal measure by the applied pulse electrode andthe problem of reflect the limited ablation area are effectively avoided, the relationship between the impedance spectrum measured by different electrode pairs and the actual ablation size is established aft subsequent data processing according to the impedance spectrum variation measured by different electrode pairs. At the same time, the change of tissue electrical properties was obtained by applying small signal test pulse during the treatment, and the mathematical model was established to judge the tissue ablation condition. At that same time, the invention can combine the advantage of thesweep frequency method and the test pulse method respectively, and solve the important problem of dynamic monitoring of curative effect in the treatment process of ablation effect aft irreversible electroporation pulse treatment and immediate evaluation of curative effect after treatment.
Owner:CHONGQING UNIV
Neuronal cells obtained by electric pulse treatment of es cells
It is an object of the present invention to apply a novel method of preparing neural cells from ES cells. The method of the present invention is characterized by the electric pulse treatment of differentiating ES cells. Nerve cells obtained by the method of the present invention have the flexibility to differentiate into a variety of types of neurons in vivo preferably without the need for application of growth factors.
Owner:RIKEN
Pressure-pulse therapy apparatus
Disclosed is a device for producing an intracorporeal pressure pulse comprising a pressure pulse source configured to generate a collimated pressure pulse and an acoustic lens including at least one ring-shaped focusing section configured to focus a pressure pulse generated by the pressure pulse source substantially to the vicinity of the central axis of the ring-shaped focusing section.
Owner:MEDISPEC LTD
Dynamic real-time evaluation device and evaluation method for irreversible electroporation tissue ablation effect
Owner:CHONGQING UNIV
Tumor treating steep pulse equipment and process
ActiveCN101019779ATotal destructionRich high frequency componentsSurgical instruments for heatingSide effectTreatment effect
The present invention is tumor treating steep pulse equipment and process, and belongs to the field of tumor treating technology. The tumor treating steep pulse equipment includes one steep pulse generating, measuring and controlling system, one computer system, one power source system, and one control console. The tumor treating steep pulse equipment with tumor treating electrodes is used for program tumor treatment, and ns level steep pulse is applied to the tumor tissue, so as to destroy and kill tumor cell irreversibly through electric shock. The present invention has high treatment effect, no side effect caused by chemotherapeutic medicine and simple operation, and may be used widely for the tumor treatment of human body and animal.
Owner:北京博莱德光电技术开发有限公司
Preparation method of aluminum-doped zinc oxide transparent conductive oxide film
InactiveCN102994975AReduce defectsLow resistivityChemical vapor deposition coatingPulse treatmentAluminium
The invention provides a preparation method of an aluminum-doped zinc oxide transparent conductive oxide film. The method is characterized in comprising the steps that: a reaction chamber is vacuumed and heated; high-purity nitrogen with a purity of 5N is used for washing various gas pipes and the reaction chamber; a zinc source precursor is delivered into the reaction chamber, and pulse treatment is carried out; excessive precursor is removed; steam is delivered in, and pulse treatment is carried out; excessive steam is removed by washing, and a zinc oxide deposition cycle is finished; an aluminum oxide deposition cycle with a similar process is finished; when zinc oxide and aluminum oxide circular deposition is finished, high-purity hydrogen is delivered in, and excessive hydrogen is removed, such that an aluminum-doped zinc oxide film deposition process under a hydrogen atmosphere condition is achieved; and the preparation of the aluminum-doped zinc oxide transparent conductive oxide film is finished. With the relatively low temperature, the AZO film can be deposited on low-melting-point and flexible substrates such as high-molecular polymers, and AZO film application scope is greatly expanded.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
H-bridge with sensing circuit
InactiveUS7194303B2Interference with sensing is avoidedHeart defibrillatorsPulse therapyEnergy storage
In a cardioverter / defibrillator system, an electrical circuit includes an energy storage device, an output circuit for controlling delivery of pulse therapy from the energy storage device to a patient, and a sensing circuit coupled across the patient to sense the patient's heart signal. The output circuit may be in the form of an H-bridge switching circuit wherein a pair of switches of the output circuit is simultaneously turned on to discharge residual voltage across the patient that remains after delivery of pulse therapy. Thus, interference with sensing of the patient's heart signal is avoided.
Owner:CAMERON HEALTH
Dynamic lead condition detection for an implantable medical device
The present invention provides for a method, apparatus, and system for performing a dynamic detection of a lead condition associated with a lead assembly in an implantable medical device for providing a controlled current therapeutic electrical signal to a cranial nerve. A pulsed therapeutic electrical signal is provided to a portion of a patient's body. A multiplicity of feedback signals is provided. Each the signal in the multiplicity comprises a voltage signal associated with the lead assembly for a pulse in the pulsed therapeutic electrical signal. For each the feedback signal, a determination is made as to whether the voltage signal is below a predetermined threshold to create a multiplicity of voltage signal comparison results. A determination is made as to whether or not a lead condition problem exists based upon the multiplicity of voltage signal comparison results.
Owner:LIVANOVA USA INC
Computer-based control for a counterpulsation device using noncompressed air
A counterpulsation device that operates without the use of compressed air or pressurized gas includes at least one inflatable cuff that is adapted to be placed about a selected portion of the patient's body. A first conduit connects the inflatable cuff to an air transfer device so that noncompressed air can be transferred from the air transfer device to the cuff through the first conduit to inflate the cuff. A second conduit connects the cuff to the air transfer device so that air can flow through the second conduit to deflate the cuff. The system is controlled using a computer-based controller that requires a series of initialization procedures before it will operate the system. A patient profile database includes historical treatment data for each patient and is automatically updated with each counter pulsation therapy session.
Owner:CPCA2000
Distance estimation between a fiber end and a tissue using numerical aperture modulation
Owner:LUMENIS LTD
Method for preparing tea polyphenol/cellulose acetate nanofiber membrane
The invention discloses a method for preparing a tea polyphenol / cellulose acetate nanofiber membrane. Cellulose acetate and absolute ethyl alcohol are placed in a sealed container, and stirred at room temperature till even dispersing is achieved, and mixed liquid is obtained; tea polyphenol powder is added to N-N dimethyl formamide liquid, the solution is placed in an ultrasonic cell dispenser in a sealed mode, and circulating pulse treatment is carried out; the mixed liquid of cellulose acetate / absolute ethyl alcohol is poured into a tea polyphenol N-N dimethyl formamide solution, and a mixed solution with the mass fraction of cellulose acetate being 8% to 12% is prepared; stirring is carried out till a uniform and transparent spinning solution is formed, and the tea polyphenol / cellulose acetate nanofiber membrane is prepared through static spinning. Nanofibers prepared through the method are smooth and even in surface, the advantages of tea polyphenol and cellulose acetate can be comprehensively utilized in the nanofiber membrane, and the nanofiber membrane has wide application prospects in the fields of medical treatment and public health, health care and the like.
Owner:SUZHOU UNIV
Apparatus and method for pulsed electric field-assisted countercurrent extraction of grape skin residue polyphenol
InactiveCN103223261AHigh extraction rateIncrease economic value addedOrganic chemistryEnergy based chemical/physical/physico-chemical processesPolyphenolTime-Consuming
The invention discloses an apparatus for extracting grape skin residue polyphenol by pulsed electric field auxiliary counter current, which comprises a pulsed treatment pool and N extraction units, and N is no less than 1; the pulsed treatment pool and N extraction units are arranged in order; a solvent inlet is arranged above the N extraction units, and the lower part of the pulsed treatment pool is provided with an extract outlet. During work, firstly, the solvent is injected into the Nth extraction unit, and the solvent flows from the filled extraction unit into the next extraction unit, and finally the solvent flows from the first extraction unit into the pulsed treatment pool. The invention also discloses a method for realizing extraction of grape skin residue polyphenol by pulsed electric field auxiliary counter current according to the apparatus. The invention solves the problems of long time consuming, low extraction efficiency and complex operation technology when extracting grape skin residue polyphenol by the present traditional method.
Owner:SOUTH CHINA UNIV OF TECH
Multi-scale data combine frequency band expanding method based on seismic sequence theory
A Multi-scale data combine frequency band expanding method based on seismic sequence theory comprises the steps of: carrying out time-frequency analysis on ground seismic post-stack data; carrying out seismic record pulsing on the ground seismic post-stack data to obtain a first geologic model; matching the first geologic model with a corresponding cross-well seismic profile in an optimization way so as to obtain match factors of the cross-well seismic profile and the ground seismic post-stack data; under constraint of ground seismic horizon data, carrying out spatial change treatment on the match factors to obtain spatial change match factors; leading the spatial change match factors to act on the first geologic model to obtain a first data volume; carrying out seismic record pulsing treatment on the first data volume to obtain a second geologic model; and taking the second geologic model as a constraint condition to carry out broadband-constrained inversion on the ground seismic post-stack data so as to obtain a second data volume. By the method, joint inversion can be carried out on the cross-well seismic and ground seismic post-stack data, thus obtaining high-resolution data volume.
Owner:中国石化集团胜利石油管理局有限公司
Digital music therapy instrument
InactiveCN102188773AImprove bindingGood treatment effectSleep inducing/ending devicesArtificial respirationDiseaseTreatment effect
The invention provides a digital music therapy instrument. The instrument comprises a music play module and a pulse therapy module, wherein the music play module comprises two paths of output ends, one path is used for direct output and playing, and the other path is connected with the pulse therapy module; and the pulse therapy module comprises a music amplifying module for extracting and amplifying a music signal, a pulse generation module for converting the amplified music signal into a pulse waveform, and a voltage lifting module for lifting the pulse waveform into a human body therapy electric signal acting on human body acupuncture points. The instrument can play music and generate the human body therapy electric signal synchronous with the music beat simultaneously, enhances the combinability of the music and electrotherapy, is also provided with a blood pressure measurement module, an emotion analysis module and a music selection module, medicates a user according to disease based on the emotion of the user, and achieves a better therapy effect by selecting music which is more suitable for the user.
Owner:WUHAN UNIV OF TECH
Functional gradient titanium alloy strip and preparation method thereof
InactiveCN104630679ASimple preparation processLow costMetal rolling arrangementsHigh energyElectrical impulse
The invention discloses a method for preparing a functional gradient titanium alloy strip. The method comprises the following steps: driving a raw material strip to move at a constant speed; electrically connecting a high energy pulse power supply with a moving strip by virtue of two immovable electric contact devices which are arranged along the strip moving direction at an interval, intermittently introducing high energy pulse current with the frequency of 60-760Hz, the voltage of 10-600V and the pulse width of 10-6000mu s into the strip, and performing high energy pulse treatment on the strip; cutting the treated strip, thereby obtaining the functional gradient titanium alloy strip. The invention also provides a functional gradient TC4 titanium alloy strip which is prepared from a TC4 titanium alloy strip with single mechanical property by adopting the preparation method, and the elasticity modulus of the strip continuously changes along the length direction of the strip. The preparation process is simple and low in cost, online continuous production can be realized, and an oxidation phenomenon on the strip surface is avoided in the preparation process. The titanium alloy strip does not cause the failure and breakage phenomena and is good in mechanical properties.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Super-hydrophobic transparent glass and preparation method thereof
InactiveCN107500554AEliminate the problem of weak combination and easy peeling offEliminate the problem that it is not easy to maintain, that is, the superhydrophobicity is not easy to maintainMicro nanoFree energies
The invention relates to super-hydrophobic transparent glass and a preparation method thereof, in particular to super-hydrophobic high-transparent glass prepared through ultrafast laser and a preparation method of the high-transparent glass. Discrete dotted pits are distributed in the surface of the super-hydrophobic transparent glass, and micro-nano structures are formed in the pits. According to the preparation method of the super-hydrophobic transparent glass, the discrete dotted pits are prepared in the surface of the glass through ultra-short laser pulse, each dotted pit is subjected to repeated variable-energy laser pulse treatment, the rich micro-nano structures are formed, and low-free-energy surface treatment is performed with a fluoroalkyl silane gas phase modification method. The method adopts a simple process, the dotted pit structure is accurate and adjustable, the processing process is efficient and controllable, and the repeatability is good. The obtained glass has high transparency, stable super-hydrophobic performance and controllable hydrophobicity and transparency, has the glass surface contact angle reaching 160 degrees and can realize the visible light transmittance up to 90% or above. The super-hydrophobic transparent glass has broad prospects in the field of building window glass, transportation windows, automobile rearview mirrors, water-proof mirrors, solar crystalline silicon cell surface protection and the like.
Owner:TSINGHUA UNIV
Biological conductive bonding die
The invention discloses a brand new biological conductive bonding die applied to a pulse therapeutic device. A product comprises all natural materials, a formula, a preparation process and a built-in conductive metal buckle of the biological conductive bonding die. The defects of environmental pollution, easiness for allergy and slight irritation of the conventional chemical bonding die are overcome. The product is prepared by adding food grade glutin into extracting solutions of natural plants such as natural Chinese angelica, moxa, pseudo-ginseng, myrrh, chrysanthemum and the like and refining. The product has the characteristics of softness, high autohension, comfort after skin contact, high air permeability, no allergy or irritation, fragrances of natural plants, environmental friendliness and no secondary environmental pollution.
Owner:广州丰得利医疗器械股份有限公司
Wearable therapeutic apparatus
ActiveCN106693177AAccurate Pulse TherapyProfessionalElectrotherapyTherapeutic coolingHuman bodyThermal stimulation
The present invention discloses a wearable therapeutic apparatus, which comprises a wearable body. The wearable body has a front side and a back side. Fixing belts are arranged at the two ends of the wearable body. The fixing belt at one end of the wearable body is detachably connected with the fixing belt at the other end of the wearable body. The back side of the wearable body is provided with a plurality of electrode patches corresponding to the positions of the acupuncture points of a human body. The front side of the wearable body is provided with a control device. Resistance wires and leads are arranged between the front side and the back side of the wearable body. The control device comprises a control circuit. The electrode patches and the resistance wires are connected with the control circuit through the leads. According to the technical scheme of the invention, the electrode patches of the wearable therapeutic are located corresponding to the positions of the acupuncture points of the human body, so that the pulse therapy is accurately conducted on acupuncture points in need of treatment. The well-chosen clinical experience-based acupoint combination is applied to common diseases, so that the advantages of strong speciality and more obvious treatment effect are realized. Meanwhile, the thermal stimulation on the human body is conducted through the heating process of resistance wires, so that multiple effects are achieved. Moreover, the wearable therapeutic apparatus is simple in structure, and convenient to carry about.
Owner:SOUTHERN MEDICAL UNIVERSITY
Methods for producing starch selenium polysaccharide and selenium-rich pre-gelatinized nutritional rice paste by using pulsed electric fields
ActiveCN106036394ALow gelatinization temperatureIncreases Slow Digestible Starch ContentFood scienceSodium nitriteSelenium intake
The invention discloses methods for producing starch selenium polysaccharide and selenium-rich pre-gelatinized nutritional rice paste by using pulsed electric fields. According to the methods, (1) a sodium hydrogen sulfite solution and a sodium nitrite solution are mixed and then added to a starch / rice flour emulsion; (2) the conductivity of the emulsion in the step (1) is adjusted to range from 0.02 mS / cm to 4.0 mS / cm; (3) the emulsion in the step (2) is placed in a pulse treatment device, and starch / rice flour ester is obtained; (4) starch / rice flour ester and selenite are mixed and placed in the pulse treatment device, and starch selenium polysaccharide / selenium-rich pre-gelatinized nutritional rice flour is obtained; (5) the selenium-rich pre-gelatinized nutritional rice flour obtained in the step (4) and enzymatic rice bran powder are evenly mixed, and the selenium-rich pre-gelatinized nutritional rice flour is obtained. With the methods, the content of selenium in the starch / rice paste can be significantly increased, the per capita selenium intake of the public is increased, the content of other mineral elements is increased, the gelatinization temperature of the rice paste is reduced, and the problem that existing commercially-available rice paste products cake easily in the brewing process is solved.
Owner:SOUTH CHINA UNIV OF TECH
Lifetime prolonging and repairing device of lead-acid battery
ActiveCN106129498AExtended service lifeAvoid depositionFinal product manufactureElectrolyte/reactants regenerationElectrical batteryMedium frequency
The invention discloses a lifetime prolonging and repairing device of a lead-acid battery. The device comprises a regulated power supply module, a single chip microcomputer control module, a frequency sweep pulse wave generation module, a battery state identification module and a photoelectric coupling module, wherein the single chip microcomputer control module is connected with the frequency sweep pulse wave generation module, the regulated power supply module, the battery state identification module, an LED signal display module and the photoelectric coupling module via a circuit separately; the frequency sweep pulse wave generation module can generate a low-medium frequency pulse wave and a medium-high frequency pulse wave for pulse treatment on a pole plate of the battery for various states of the lead-acid battery. The device can maintain the lead-acid storage battery through being connected to the lead-acid storage battery and can repair the waste lead-acid battery.
Owner:HAISAIPU NEW ENERGY HIGH TECH JIANGSU CO LTD
Mass/Volume Estimation of Contamination, Removal and/or in situ Treatment Using Subsurface Pressure Waves
ActiveUS20090277844A1Overcomes fingering and preferential pathwayConvenient treatmentSurveyContaminated soil reclamationIn situ degradationPush pull
A remediation process that a employs improved quantitative method(s) of estimating of the volume and / or mass of contaminant in the subsurface, removal and or in situ degradation of the contamination using subsurface pulsing treatment (“SPT”) technology, and evaluation of the degree of remediation by re-applying the quantitative contaminant evaluation methods. The process uses SPT technology with the addition of a vacuum or sub-atmospheric pressure to an extraction well in order to create a push-pull effect to remove free contaminant or residual in conjunction with the pressure wave driving force created in the excitation or excitation well. The process can quantitatively measure the amount of residual contaminant, which up until now has not been possible or tractable using in situ methods, as well as measure the amount of residual that can be removed by SPT.
Owner:REMMETRIK
Method for preparing oligomeric proanthocyanidins by enhanced degradation under pulsed electric field
ActiveCN102924422AHigh purityReduce chemical reaction timeOrganic chemistryEnhanced degradationImpurity
The invention discloses a method for preparing oligomeric proanthocyanidins by enhanced degradation under a pulsed electric field. According to the method, polymeric proanthocyanidins serving as raw materials are degraded under the assistance of the pulsed electric field to prepare the oligomeric proanthocyanidins. The method comprises the following steps of: dissolving the polymeric proanthocyanidins, adding sulfite, treating by the pulsed electric field, separating, performing alcohol leaching to remove impurities, purifying, concentrating and drying to obtain the oligomeric proanthocyanidins, wherein in the step of treating by the pulsed electric field, a polymeric proanthocyanidin solution is pumped in a pulse treatment chamber and is treated for 3 to 20 milliseconds under the conditions that the electric field intensity is 40 to 60 kV / cm, the pulse width is 50 to 120 microseconds and the pulse frequency is 100 to 3,000 Hz, and a pulse waveform is a square wave. The method is feasible, short in treatment time of the electric field, high in practicality, energy-saving and environment-friendly, so that the application range of the polymeric proanthocyanidins in fields of medicines, food, cosmetics and health-card products is expanded.
Owner:SOUTH CHINA UNIV OF TECH
Method for encapsulating homogeneous catalyst in pore channels of mesoporous molecular sieve
ActiveCN107519936AWide variety of sourcesLow priceMolecular sieve catalystsOrganic-compounds/hydrides/coordination-complexes catalystsMolecular sieveWater vapor
A method for encapsulating a homogeneous catalyst in pore channels of a mesoporous molecular sieve comprises the following steps: the mesoporous molecular sieve is fed into a vacuum container, air is extracted, a well prepared homogeneous catalyst solution is injected into the vacuum container containing the molecular sieve, a sample is obtained after stirring and vacuumizing, placed on a quartz plate and smeared uniformly with a diluting agent, the aired quartz plate is placed in a low-temperature vacuum atomic layer deposition equipment, an oxide precursor is subjected to primary pulse treatment and air-suppressing reaction, and a physically absorbed part is removed through air extraction; secondary pulse treatment is performed, steam and the oxide precursor are subjected to the air-suppressing reaction, and unreacted materials are discharged through air extraction; the two steps are repeated, an oxide is obtained through deposition on the surface of a sample base, the total thickness of a film is controlled by changing the cycling times of the two steps, and the size of pores, at seals, of the mesoporous molecular sieve is controlled. The method has the advantage that the homogeneous catalyst is easy to separate and is recyclable.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Photodynamic therapy system with visualization and light spot boundary display function
The invention discloses a photodynamic therapy system with a visualization and light spot boundary display function. According to the system, an optical synchronization module and an optical multiplexing module are additionally adopted; the optical synchronization module performs synchronous chopper modulation on therapy laser through using the exposure and readout time sequence signals of an electronic CCD or CMOS optical system so as to make output pulse therapy laser keep synchronous with an exposure stage and a readout stage, so that the visualization of a tissue image can be realized; an optical coupler in the optical multiplexing module is adopted to couple indication light and the pulse therapy laser; the coupled light and pulse therapy laser are outputted to an tissue through an optical fiber; and since the light emission regions of the coupled pulse therapy laser and indication light are identical, and therefore, the boundary of the therapy light spot can be displayed in real time though identifying the boundary of the indication light spot, and a doctor can intuitively see the position relation of the therapy light spot and the tissue where a lesion exists, and blind manipulation of the doctor by means of experience can be avoided, and the accuracy and safety of therapy can be improved.
Owner:GENERAL HOSPITAL OF PLA
Method for preparing iron-based nanocrystalline material by mid-low-frequency magnetic pulse
InactiveCN102094156AThe amount of crystallization can be controlledAnnealing Embrittlement AvoidanceMagnetic materialsElectric arc furnaceSurface velocity
The invention relates to the technical field of the preparation of soft magnetic materials, in particular to a method for preparing an iron-based nanocrystalline material by a mid-low-frequency magnetic pulse. The method comprises the following steps: at a vacuum degree below 5*10<-3>Pa, smelting alloy materials into a mother alloy molten mass in a vacuum high-frequency furnace or arc furnace; then, at a vacuum degree of 2*10<-3>Pa, injecting the mother alloy molten mass into a vacuum single-roller molten mass rapid-cooling device under the protection of an argon gas atmosphere, and preparing the mother alloy into an amorphous thin strip, wherein the linear surface velocity of a cooling roller is 45-49m / s, the distance between a quartz nozzle and a copper roller is 0.5mm, the superheating temperature of the molten mass at the outlet of the nozzle is 50K; and finally, carrying out magnetic pulse treatment on the amorphous thin strip in a multi-function process control pulse magnetic field generator to obtain the amorphous nanocrystalline material, wherein the field intensity Hp of the magnetic pulse is 100-400Oe, the frequency f is 20-2000Hz, and the operation time tp is 5-10 minutes.
Owner:NORTHEASTERN UNIV
Method for regenerating performances of aged duplex stainless steel under action of pulse current
A method for regenerating the performances of aged duplex stainless steel under the action of pulse current, and belongs to the field of metal material processing. The method comprises the following steps: determining the aging degree of the aged duplex stainless steel, fixing the aged duplex stainless steel on a pulse power supply by a clamp, continuously applying a pulse for a corresponding timeto perform pulse treatment on the aged duplex stainless steel, and determining the parameters and the action time parameter of the pulse current according to the assessed ageing and brittleness degree of the duplex stainless steel, wherein the parameter ranges of the pulse treatment are as follows: the frequency is 1-200 Hz, the pulse width is 20 [mu]s to 1 ms, the current is 10-2000 A, and the action time is 1-6 h. The method is used to process aged and brittle duplex stainless steel in situ to restore the aged duplex stainless steel to an unaged state, and further reduces the temperature for eliminating the aging and the brittleness of the duplex stainless steel to save a lot of energy.
Owner:UNIV OF SCI & TECH BEIJING
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