778 results about "High voltage pulse" patented technology

Electroporation-based therapies (EBTs) employ high voltage pulsed electric fields (PEFs) to permeabilize tumor tissue, resulting in changes in passive electrical properties detectable using electrical impedance spectroscopy (EIS). Currently, commercial potentiostats for EIS are limited by impedance spectrum acquisition time (˜10 s); this timeframe is much larger than pulse periods used with EBTs (˜1 s). Fourier Analysis SpecTroscopy (FAST) is introduced as a methodology for monitoring tissue inter-burst impedance (diagnostic FAST) and intra-burst impedance (therapeutic FAST) during EBTs. FAST is a rapid-capture (<<1 s) technique which enables monitoring of inter-burst and intra-burst impedance during EBTs in real-time. FAST identified a frequency which delineates thermal effects from electroporation effects in measured impedance. Significance: FAST demonstrates the potential to perform EIS, in addition to intra-burst impedance spectroscopy, using existing pulse generator topologies.

The invention provides a cable fault detection method based on an intelligent cable fault test device and a test device, and the method comprises the steps: synchronously connecting a fault cable and an adjacent healthy cable through a cable fault tester, and enabling the fault cable to be connected with the adjacent healthy cable when a high-voltage pulse is applied; and synchronously capturing an active reflection signal of the fault cable and a passive coupling induction signal of the healthy cable. Through cross-cable signal feature comparison, a real fault signal is accurately identified, a roughly measured fault distance is calculated according to the real fault signal, and fuzziness of traditional waveform interpretation is overcome. According to the spectrum characteristics of the real fault signal, the optimal filtering parameter is adaptively configured for the acoustic-magnetic synchronous positioning instrument, and the signal-to-noise ratio of the accurate fixed point is improved. And accurate point positioning is carried out near the rough measurement distance, and secondary verification is carried out at the corresponding position of the healthy cable, so that closed-loop positioning of the fault is completed in a mode of confirming that no sound magnetic signal exists. According to the invention, accurate extraction and positioning guidance of fault features are realized, and the accuracy and efficiency of cable fault detection are greatly improved.

Disclosed is a beauty treatment device that kills adipocytes by locally sucking in skin to be treated and sequentially applying a high-frequency current and a high-voltage pulse. The beauty treatment device according to the present invention comprises: a main body unit; and a suction treatment unit coupled to the main body unit and having a treatment space for applying electrical stimulation by sucking in the skin of a user, wherein the suction treatment unit comprises: a suction nozzle made of a resin material, which partitions the treatment space; and a pair of electrodes disposed inside the suction nozzle so as to face each other at a distance, and the pair of electrodes have a metal conductive layer formed by plating the surface of a resin material electrode core with a conductive metal.

The invention discloses a rock pulse fracturing and high-voltage pulse discharge collaborative fracturing simulation device and method.The device comprises a triaxial loading mechanism, a pulse fracturing mechanism, a high-voltage pulse discharge mechanism, a collaborative control part and a monitoring mechanism, and the triaxial loading mechanism is used for loading triaxial pressure to a rock sample; a simulation hole is formed in the upper end surface of the rock sample, and a plug is plugged at the hole opening of the simulation hole; the pulse fracturing mechanism comprises a fracturing fluid storage tank and a pulse pumping assembly; the high-voltage pulse discharge mechanism comprises a Marx generator and a discharge electrode; the monitoring mechanism comprises a plurality of acoustic emission sensors and an acoustic emission data processor. The influence of the synergistic effect of pulse fracturing and high-voltage pulse discharge on the rock fracturing process can be systematically studied, the synergistic effect mechanism of the two is disclosed by accurately controlling the fracturing fluid release rhythm and the high-voltage pulse discharge rhythm, a parameter optimization basis is provided for field fracturing operation, the fracturing effect is improved, and the rock fracturing efficiency is improved. The mining cost is reduced.

The utility model provides a high-voltage pulse generating device and a test system. The high-voltage pulse generating device comprises a main control unit, a driving circuit, a pulse control circuit with a wide bandgap semiconductor power device, and an output circuit, the first end of the main control unit is coupled with the first end of the driving circuit, the second end of the driving circuit is coupled with the first end of the pulse control circuit, and the second end of the pulse control circuit is coupled with the output circuit; the main control unit is configured to generate two paths of first PWM (Pulse Width Modulation) signals with dead time control; the two paths of first PWM signals are sent to the driving circuit; and the driving circuit is configured to process the first PWM signal and then drive the pulse control circuit, so that the output circuit generates a high-voltage pulse signal. According to the utility model, the structure is simple, the cost can be greatly reduced, the output pulse speed can be flexibly set, and the CMTI test requirements of different isolated gate drivers can be met.

The invention discloses a high-power corona preionization excimer laser, which is characterized in that a laser discharge cavity is arranged in a shell, a main discharge electrode is arranged in the laser discharge cavity, and the main discharge electrode comprises a main discharge cathode and a main discharge anode; corona rods capable of conducting discharge preionization on working gas are arranged in the laser discharge cavity and located on one side of the main discharge cathode at intervals, each corona rod comprises a preionization electrode and a ceramic insulator, gaps are formed between the peripheral face of each ceramic insulator and the outer side wall of the main discharge cathode and the inner side wall of the insulation cavity, and the preionization electrodes and the main discharge anode are grounded. The main discharge cathode is connected with a negative high-voltage pulse, and when the excimer laser works, the driving voltage pulse of the corona rod is the same as the driving voltage pulse of the main discharge electrode. Corona discharge preionization is carried out through the corona rod, the main discharge electrode cannot be corroded, discharge dust cannot be generated, and it is ensured that the main discharge electrode carries out uniform glow discharge to generate high-quality laser.

The invention discloses a doping purification process of high-purity quartz sand, and relates to the technical field of quartz sand purification, and the doping purification process comprises the following steps: crushing quartz sand, putting the crushed quartz sand into a microwave reactor, and introducing ozone; immersing the quartz sand subjected to microwave treatment into bacterial liquid, stirring or oscillating, and then separating; the bacterial liquid comprises acidophilic thiobacillus thiooxidans and silicate decomposition bacteria in a mass ratio of 1: (3-10), the concentration of the bacterial liquid is 106-108 CFU / mL, and the pH value is 1.5-3.0; the separated quartz sand is sequentially subjected to high-voltage pulsed magnetic field action and nano bubble flotation; the quartz sand subjected to nano bubble flotation is subjected to acid pickling with a composite acid solution; carrying out pyrolysis film removal on the quartz sand subjected to acid pickling; removing membrane impurities from the quartz sand subjected to pyrolysis membrane removal through a subcritical water repairing process, and filtering, washing and drying; according to the method, micron-sized impurities in the quartz sand can be efficiently separated, impurities of different sizes in the quartz sand are removed step by step, the impurity removal rate is high, the removal effect is good, and the process cost is reduced.

The invention relates to an intelligent high-voltage pulse electrical stimulation system and a control method, and solves the problems of poor individual suitability, low positioning precision and weak safety in the prior art. The system obtains body surface point cloud through a split scanning module (infrared / TOF), and dynamic mapping of an anatomical structure is achieved in combination with a medical image template library (the error is smaller than 1.2 mm); dynamically adjusting a high-voltage pulse (0-1200V) based on a BMI-impedance model, and adopting an improved KNN algorithm to match a discharge scheme; three-level safety protection is innovated, and dangerous area protection is achieved through impedance sudden change detection, displacement compensation and phase counteracting (electric field attenuation is larger than 99.9%). Clinical verifications show that the positioning precision is + / -0.5 mm, the pain relief rate of obese patients (BMI = 32) is 92%, and the false touch rate is less than 0.01%. Accurate targeting and safe regulation and control are achieved, and the method is suitable for the fields of muscle rehabilitation, pain management and the like.

Apparatuses, systems and methods are provided for treating pulmonary tissues via delivery of energy, generally characterized by high voltage pulses, to target tissue using a pulmonary tissue modification system (e.g., an energy delivery catheter system). Example pulmonary tissues include, without limitation, those within the respiratory tract, particularly the epithelium (the goblet cells, ciliated pseudostratified columnar epithelial cells, and basal cells), lamina propria, submucosa, submucosal glands, basement membrane, smooth muscle, cartilage, nerves, pathogens resident near or within the tissue, or a combination of any of these. The systems may be used to treat pathogens, such as bacteria and viruses, particularly coronaviruses.

The invention provides an energy recovery type intelligent charging pile. The energy recovery type intelligent charging pile comprises a charging pile body, a charging module, a control module, an insulation monitoring module, a fault early warning module, an energy recovery module and an active repairing module. The insulation resistance value of the charging cable is monitored in real time through the insulation monitoring module; a multi-stage processing mechanism including early warning, power reduction charging and circuit breaking is triggered through a fault early warning module according to the comparison data; when the fault triggering data comprises triggering power reduction or circuit breaking, residual electric energy in a charging loop is stored through an energy recovery module; the active repair module generates a high-voltage pulse with a preset peak frequency by using the electric energy stored by the energy recovery module, and performs physical repair on an insulation damaged part of the charging cable. Through real-time sensing of the insulation monitoring module, intelligent decision making of the fault early warning module, closed-loop management of the energy recovery module and physical intervention of the active repair module, early warning and active repair are carried out on the insulation fault of the charging cable, and the usability of the charging pile is improved.

The invention discloses a nanosecond high-voltage steep pulse generator, which relates to the technical field of high-voltage pulses and comprises a microcontroller, a Marx circuit, a trigger control module, an isolation high-voltage driving module, a safety module and a power management module, the microcontroller comprises a main chip, and parameters of the output end of the Marx circuit are collected in real time through the microcontroller. The trigger control module generates a nanosecond synchronous trigger signal; the isolation high-voltage driving module converts a low-voltage signal of the microcontroller into a high-voltage driving signal; the safety module is used for monitoring the state of the system, immediately cutting off a trigger signal when a fault occurs, and protecting the Marx circuit and the microcontroller; according to the invention, the microcontroller is used for generating synchronous trigger pulses and accurately triggering charging and discharging of the capacitor of the Marx circuit, and the high-speed ADC arranged inside can accurately control and detect voltage balance, trigger signals and fault protection.

The invention discloses a rock internal three-dimensional controllable crack generation device and method based on high-voltage pulse discharge, and relates to the technical field of rock mechanics experiments and engineering. The device comprises a high-voltage pulse discharge system which comprises an electric pulse generator, an electrode and a conductive fixing frame, the electrode is used for being inserted into a to-be-measured rock guide hole and connected with the negative electrode of the electric pulse generator, the conductive fixing frame is used for fixing the to-be-measured rock and connected with the positive electrode of the electric pulse generator, and the electric pulse generator is used for generating high-voltage pulse discharge; cracks are formed in the rock; the track control module is used for controlling the electrode to move in the to-be-detected rock guide hole so as to guide the crack to extend along a preset track; the medium circulation module is used for injecting a liquid medium into the to-be-measured rock guide hole; and the feedback control module is used for monitoring the crack propagation signal and adjusting the discharge parameter according to the monitoring result. According to the method, the controllability of the fractal characteristics of the cracks and the directional expansion of the cracks in a three-dimensional space can be realized.

A system for treatment of patient tissue by delivery of high-voltage pulses comprising an ablation catheter, a measurement unit and an electronic control unit (ECU). The measurement unit is configured to perform measurements using an energy source, whereby the impedance and / or current measurement values are determined as response to an alternating voltage and / or at least one voltage pulse. The ECU is configured to receive and analyze said measurement values provided by the measurement unit and identify a presence of hemolysis based on a determined decrease in the measured impedance values over time.

The invention discloses a porcelain insulator zero value rapid detection method and device based on impulse current characteristics. The method comprises the steps that high-voltage pulses are applied to the two ends of a to-be-detected porcelain insulator; an impact current signal in an insulator loop is sensed by using a magnetic ring, and the impact current signal is converted into an integral voltage signal through an integral circuit; the integral voltage signal is compared with a preset threshold value, if the integral voltage signal is higher than the preset threshold value, it is judged that the insulator is a zero-value insulator with the internal breakdown defect, and the preset threshold value is predetermined according to the given multiple of the integral voltage measured by a normal insulator under the same condition. By detecting the integral voltage signal of the breakdown current, misjudgment and missed judgment caused by different surface states or internal defect types of the insulator are effectively avoided, the detection accuracy and reliability are improved, and a new effective means is provided for rapid detection of the porcelain insulator.

The invention discloses a high-voltage electric pulse cracking coal rock stress shock wave monitoring device which comprises a high-voltage pulse capacitor, a voltage divider, a high-voltage pulse switch, a high-voltage pulse cracking generation chamber, a high-voltage probe, a Rogowski coil and an oscilloscope. A test piece is fixed in the high-pressure pulse cracking generation chamber, a circle of test piece clamping assembly corresponding to the test piece is arranged in the high-pressure pulse cracking generation chamber, needle-shaped electrodes are arranged on the two sides, not provided with the test piece clamping assembly, of the test piece, and a piezoelectric pressure sensor is arranged on the high-pressure pulse cracking generation chamber. The detection signal output ends of all the piezoelectric pressure sensors are connected with the pressure detection signal input end of the stress wave signal collector, and a Faraday cage used for covering the piezoelectric pressure sensors is arranged in the high-pressure pulse fracturing generation chamber. The propagation characteristics of the high-voltage electric pulse stress shock waves in the coal rock mass can be accurately and directly captured in real time, and accurate and reliable data support is provided for deep research on a high-voltage pulse electric crushing mechanism.

A pulse generator is disclosed. The pulse generator includes a DC source; a plurality of switches, a transformer; and a pulsing output. The pulse generator can be coupled with a plasma chamber. The pulsing output outputs high voltage pulses having a peak-to-peak voltage greater than 1 kV and a voltage portion between consecutive high voltage bipolar pulses that has a negative slope that substantially offsets the voltage reduction on a wafer within a plasma chamber due to an ion current. The resulting voltage at the wafer may be substantially flat between consecutive pulses.

The utility model belongs to the field of cable detection, and particularly relates to a calibration device of cable detection equipment, which comprises a shell, a voltage verification high-voltage input end is fixedly embedded in a position, close to the upper left corner, of the front side of the shell, and a voltage verification high-voltage ground input end is fixedly embedded in a position, close to the lower left corner, of the front side of the shell; the device can simulate an open circuit, a broken line, a high-resistance fault, a low-resistance fault, a flashover fault and the like. And functions, performance, technical indexes and the like of a cable fault flash tester, a high-voltage bridge, a high-voltage pulse generator and a high-voltage unit are calibrated and inspected. The device can also be used for training the measurement and judgment of a power cable fault, a main insulation fault and an outer sheath fault, a top plate is pressed downwards, an inclined surface of a clamping block extrudes the top of a shell, the clamping block automatically shrinks inwards, and after the top plate slides to a proper position on the inner wall of the shell, the clamping block is automatically clamped in a clamping groove under the support of a spring, so that the clamping block is fixed. The device can be conveniently disassembled and assembled, and the maintenance efficiency of use is improved.

The invention discloses a silicon carbide MOSFET parallel current sharing system and method for a pulse power supply, and belongs to the technical field of SiC MOSFET parallel current sharing, the system comprises a main power circuit connected with a plurality of SiC MOSFETs in parallel and an active driving circuit, when the SiC MOSFETs are turned on, a source inductor generates an induced voltage in direct proportion to the current rising rate, and when the SiC MOSFETs are turned on, the active driving circuit drives the main power circuit to rotate; current sharing when a plurality of SiC MOSFETs are connected in parallel is realized through an in-phase amplification circuit used for detecting and amplifying an induced voltage, a differential amplification circuit used for detecting and comparing an induced voltage value, and a proportional current source circuit is controlled to extract a SiC MOSFET gate drive current. By adopting the method, the unbalanced current can be suppressed, the balance of the current flowing through each branch of the parallel SiC MOSFETs is ensured, the SiC MOSFET device in the high-voltage pulse power supply is effectively protected, and the working reliability of the circuit is improved.

The invention discloses a high-voltage positive and negative pulse detection circuit, which relates to the technical field of signal conditioning, and is characterized in that a voltage division circuit is responsible for attenuating input pulse signals, a switching diode is responsible for rectification and inputting positive and negative pulse signals into corresponding conditioning circuits respectively, and a charging circuit is responsible for maintaining pulse width characteristics of the signals; and the steepness of the signal edge is ensured by the comparator, and FPGA identification can be realized. Uncertain high-voltage pulse signals can be processed, and application scenes are diversified. The edge characteristic, pulse width and pulse direction of the pulse signal can be identified, and the signal processing capability is prominent.

The low-frequency electromagnetic wave has the characteristics of high penetrability and low signal attenuation, and can be widely applied to the fields of underground communication, underwater communication and the like. Most existing low-frequency transmitting antennas are electrically small antennas, have the problems of large size, complex equipment, short transmission distance and the like, and are difficult to meet actual requirements. The invention relates to a high-power pulse low-frequency antenna based on a Tesla coil. The high-power pulse low-frequency antenna is a high-power pulse transmitting antenna composed of a solid-state double-resonance Tesla circuit, a transformer, a primary coil and a secondary coil. The antenna adopts a high-voltage pulse generated by a Tesla circuit for feeding, and meanwhile, a transformer type impedance matching network is combined, so that the feed power is maximized. The radiation coil selects a primary and secondary nested coupling structure, the working frequency is accurately adjusted to be the output frequency of the Tesla circuit by respectively connecting resonant capacitors in series to the primary and secondary coils, and effective amplification of radiation signals is realized based on a magnetic coupling effect. The size of the coil is in the sub-cubic meter level and is within one thousandth of the working wavelength. Aiming at the antenna design difficulty in long-wave communication, the antenna has the advantages of high input power, long-distance transmission and small physical size, and has potential application value in the fields of cross-medium communication, emergency management communication and the like.

Described herein is a shock wave device for the treatment of vascular occlusions. The shock wave device includes an outer covering and an inner member inner connected at a distal end of the device. First and second conductive wires extend along the length of the device within the volume between the outer covering and the inner member. A conductive emitter band circumscribes the ends of the first and second wires to form a first spark gap between the end of the first wire and the emitter band and a second spark gap between the end of the second wire and the emitter band. When the volume is filled with conductive fluid and a high voltage pulse is applied across the first and second wires, first and second shock waves can be initiated from the first and second spark gaps.

The invention relates to an electromagnetic-acoustic integrated coupling heavy oil sewage treatment device, and belongs to the technical field of water purification equipment. The raw material tank is provided with a feeding hole and a stirrer, and a water pump pumps water in the raw material tank into a water purification tank through a pipeline; a water outlet is formed in the top of the water purification tank, a sludge outlet is formed in the bottom of the water purification tank, and an ultrasonic generating device, an ultrasonic receiving device, a magnetic field device and an electric field generating device are arranged in the water purification tank; the ultrasonic generating device is used for generating an ultrasonic field to destroy the thickness of the oil-water interfacial film; the ultrasonic receiving device is used for eliminating reflection and refraction of ultrasonic waves in the tank body; the electric field generating device is used for generating an electric field to accelerate magnetic particle sedimentation; the magnetic field device is used for generating a magnetic field to trap magnetic flocs formed by combining the oil drops with the magnetic particles and the flocculating agent; the electric field generating device is electrically connected with the transformer and the high-frequency high-voltage pulse power supply. Under the joint coupling action of electric field force, ultrasonic field and magnetic field, the problem of high difficulty in heavy oil sewage treatment is effectively solved.

A pulse generator is disclosed. The pulse generator includes a DC source; a plurality of switches, a transformer; and a pulsing output. The pulse generator can be coupled with a plasma chamber. The pulsing output outputs high voltage pulses having a peak-to-peak voltage greater than 1 kV and a voltage portion between consecutive high voltage bipolar pulses that has a negative slope that substantially offsets the voltage reduction on a wafer within a plasma chamber due to an ion current. The resulting voltage at the wafer may be substantially flat between consecutive pulses.

The invention discloses a method and a device for calibrating an ultrasonic time rod. The device comprises a pulse generating / receiving device, a first ultrasonic transducer, a second ultrasonic transducer and a display module, the pulse generating / receiving device works in a one-transmitting and one-receiving mode, the pulse generating / receiving device is used for generating high-voltage pulses, the transmitting / receiving end of the pulse generating / receiving device is connected with the first ultrasonic transducer, and the second ultrasonic transducer is connected with the display module. The first ultrasonic transducer is used for exciting ultrasonic signals, the receiving end of the pulse generator / receiver is connected with the second ultrasonic transducer, the second ultrasonic transducer is used for receiving ultrasonic signals, and the radio frequency output end of the pulse generator / receiver is connected with the input end of the display module. And when the pulse generator / receiver works in a self-transmitting and self-receiving mode, the transmitting / receiving end of the pulse generator / receiver is connected with the third ultrasonic transducer. According to the device, the sound time value of the ultrasonic sound time rod can be measured, and the ultrasonic sound time rod is calibrated based on the error.

The invention discloses a nanosecond steep pulse excitation system and a nanosecond steep pulse excitation method. The nanosecond steep pulse excitation system comprises a high-voltage pulse generation module, a controller, an impedance detection module and a treatment electrode, the high-voltage pulse generation module is used for receiving a control signal monitored by the controller and outputting a high-voltage pulse to the treatment electrode; the impedance detection module comprises a measuring electrode, tissue impedance data are collected through the measuring electrode, and the impedance data are dynamically fed back to the controller; the controller dynamically adjusts parameters of the high-voltage pulse generation module according to impedance data to form closed-loop control, the Marx circuit is optimized, the high-voltage pulse generation efficiency is high, nanosecond-level accurate triggering is achieved through embedded control, effective deposition of high-frequency energy is ensured, transient voltage spikes are reduced, impedance changes are detected in real time through the impedance detection module, and the control precision is improved. The pulse width or amplitude is dynamically adjusted, pulse parameters are adjusted in real time based on impedance changes, and excessive ablation or insufficient treatment is avoided.

The invention discloses an ultrasonic thickness measuring method, which comprises the following steps that: a CPU (Central Processing Unit) controls a high-voltage pulse transmitting unit to generate a transmitting signal, an ultrasonic probe converts the signal into an ultrasonic signal, the ultrasonic signal enters the surface of a measured workpiece, passes through the workpiece, reaches the other surface and is reflected back to the ultrasonic probe, and the ultrasonic probe captures the echo signal and converts the echo signal into an electric signal; after being filtered and amplified by the analog circuit unit, the electric signal is converted into a digital signal through the ADC, and further filtering, averaging, detection and compression processing are completed by the FPGA; and the CPU verifies the effectiveness of the echo signal, performs automatic gain adjustment, and calculates the thickness value of the measured workpiece. By optimizing parameter configuration and a processing flow in an ultrasonic detection process, accurate control and data processing of ultrasonic waves are realized, and the thickness of a measured workpiece can be accurately measured; the method is mainly based on CPU development, the requirement for the FPGA in the development process is reduced, the development flexibility is improved, and the product cost is reduced.

The invention provides a bulk metal ore grade online analysis method based on high-voltage pulse discharge breakdown spectroscopy, which comprises the following steps: (a) placing bulk metal ore particles in a high-voltage discharge electrode system filled with a liquid insulating medium, and applying 30-250kV voltage through a high-voltage electric pulse generator to carry out pulse discharge, carrying out electric breakdown on the ore particles and generating plasmas; (b) synchronously acquiring a plasma characteristic spectrum signal and a voltage waveform signal and a current waveform signal of pulse discharge in the electric breakdown process; (c) preprocessing the characteristic spectral signal, determining element types according to the wavelength of a characteristic spectral line, and extracting the intensity of the characteristic spectral line; and (d) inputting the characteristic spectral line intensity, the pulse discharge waveform parameter, the discharge condition and the ore particle property into a pre-established quantitative analysis model, and outputting the metal element grade of the ore particles.

The application discloses a kind of continuous high-voltage pulse electric field processing berry functional active ingredient reinforced extraction method.The method comprises the following steps: after the cooling device is cooled to reach the set temperature by the processing chamber device, set high-voltage pulse power output parameter, high-voltage pulse power generates bipolar symmetric square wave, set pulse electric field parameter, the distance of two titanium alloy electrodes is 100mm, the pretreated berry material is transported to the processing chamber body, and the high-voltage pulse electric field processing is carried out on the berry material, to obtain the berry extract containing active ingredient.The method proposed in the application uses continuous round square corrosion-resistant pulse electric field processing chamber, the overall structure is convenient to assemble and process, the processing chamber can be increased according to actual needs, and synchronous cooling can be realized at the same time, the low-temperature extraction and active protection of functional active ingredient are realized while the electrode is protected.

A method for enhanced extraction of functional active ingredients from berries by using continuous high-pulse electric field treatment. The method comprises the following steps: after a treatment chamber apparatus is cooled to a set temperature by means of a cooling apparatus, setting high-pulse power source output parameters; a high-pulse power source generating bipolar symmetric square waves; setting pulse electric field parameters, the distance between two titanium alloy electrodes being 100 mm; conveying pretreated berry materials to the body of a treatment chamber; and performing high-pulse electric field treatment on the berry materials, so as to obtain a berry extraction solution containing active ingredients. In the present invention, a continuous circular-to-square corrosion-resistant pulse electric field treatment chamber is used, such that the overall structure is convenient for assembly and machining; additional treatment chambers can be added according to actual requirements; and synchronous cooling can also be realized, thereby realizing low-temperature extraction and activity preservation of functional active ingredients while protecting electrodes.

The invention discloses a battery thermal management system based on a PWM (Pulse Width Modulation) voltage regulation thermoelectric refrigerating unit, which relates to the field of lithium battery thermal management and comprises a thermoelectric refrigerating unit system and an air cooling system, the air cooling system provides cooling capacity by taking air as a refrigerant; the thermoelectric refrigerating unit system comprises a lithium battery pack, an adjustable voltage power supply, a positive and negative rotation PWM voltage regulator, a semiconductor thermoelectric refrigerating unit and a digital controller which are electrically connected in sequence; the adjustable voltage power supply is used for adjusting output voltage according to the voltage regulation and control signal and providing driving electric energy for the positive and negative rotation PWM voltage regulator; the positive and negative rotation PWM voltage regulator outputs high-voltage pulse or PWM driving voltage to the semiconductor thermoelectric refrigerating unit to drive the semiconductor thermoelectric refrigerating unit to refrigerate or heat; the digital controller sends out a voltage regulation and control signal, a power switch signal and a positive and negative rotation signal according to a battery temperature measurement signal and an environment temperature. The cooling system is high in cooling efficiency and stable in cooling effect, and safe and stable operation of the vehicle-mounted battery can be effectively guaranteed.