940 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.

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 present invention discloses a defect detection method, device and equipment for a high-altitude fall prevention system, wherein the method includes: regionalizing the high-voltage electric control components and multi-layer composite insulation structures in the high-altitude fall prevention equipment; determining the high-voltage pulse parameters of each functional area and applying pulses according to environmental parameters and electromagnetic interference data; applying progressively increasing mechanical tension to the suspected stratified area; applying multiple thermal stress excitations to the target area; performing high-resolution acoustic imaging scanning to generate defect location information. The technical solution of the present invention can effectively cope with complex electromagnetic interference and extreme climatic conditions in high-altitude environments, and through a multi-dimensional and multi-stage detection process, accurately identify and locate microscopic stratified defects in high-altitude fall prevention systems, providing important guarantees for the safety of high-altitude operations.

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.

In one embodiment, an apparatus includes a power source and a moveable charging arm coupled to the power source and comprising a charging plate for contact with an electric vehicle contact plate. The charging arm is operable to transmit direct current (DC) pulse power with testing performed between high voltage pulses directly from the charging plate to the electric vehicle contact plate to charge one or more batteries at the electric vehicle. A method for charging the electric vehicle is also disclosed herein.

The invention discloses a detection circuit and a detection method for detecting whether a combustor is successfully ignited or not. The detection circuit comprises a combustor controller, an ignition coil, a first spark plug, a second spark plug, a first ignition high-voltage wire and a second ignition high-voltage wire. And the first ignition high-voltage wire is connected with the ignition coil and the first ignition electrode. And the first ignition high-voltage wire transmits a high-voltage pulse signal to the first ignition electrode. And the second ignition high-voltage wire is connected with the ignition coil and the second ignition electrode. And the second ignition high-voltage wire transmits a high-voltage pulse signal to the second ignition electrode. The first ignition electrode and the second ignition electrode are used for enabling high voltage difference between the first ignition electrode and the second ignition electrode to break down gas to form sparks, and fuel oil is ignited by the sparks to form flames. If the first ignition electrode, the second ignition electrode and the shell of the combustor form a loop to generate a current signal, it is judged that ignition succeeds; otherwise, judging that ignition fails.

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 relates to a power distribution cable line fault positioning device, and the device comprises a control unit which comprises a system host and is responsible for receiving data of each module and carrying out the comprehensive analysis and processing; the data acquisition unit provides basic data for fault positioning through a cable path instrument, measures the broadband impedance change of the cable through a broadband impedance tester, and assists in judging the fault type and position; the preliminary positioning unit is used for transmitting a high-voltage pulse signal through a pulse current generator, accurately receiving a current pulse waveform generated during discharging or breakdown through a current coupler, and preliminarily positioning a fault point; a time domain reflection measuring instrument of the accurate positioning unit accurately determines the fault position by measuring the propagation time of the high-voltage pulse signal in the cable; and the artificial intelligence processing unit performs intelligent analysis on the data by integrating machine learning and a deep learning algorithm. According to the fault positioning device and the diagnosis method, the fault of the distribution cable line can be quickly and accurately positioned, the operation is convenient, and the implementation is easy.

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 provides a double-phase pulse circuit and a high-frequency pulse therapeutic apparatus, and relates to the technical field of medical instruments, and the double-phase pulse circuit comprises a booster circuit, N groups of pulse modulation isolation transformation circuits, an amplitude-limiting current-limiting circuit, a cascade circuit, a double-phase wave modulation circuit and a main controller, the boost circuit performs pulse modulation and boost processing on the output DC voltage of the target DC power supply to obtain an initial pulse voltage signal; n groups of pulse modulation isolation transformation circuits respectively perform isolation boosting processing on the initial pulse voltage signals to obtain N high-voltage pulse signals; the amplitude-limiting current-limiting circuit performs amplitude-limiting current-limiting processing on the N high-voltage pulse signals to obtain N high-voltage square-wave pulse signals; performing cascade processing on the N high-voltage square-wave pulse signals to obtain a target square-wave pulse signal; and performing dual-phase modulation on the target square wave pulse signal to obtain a target dual-phase pulse signal. According to the technical scheme, the effect of improving the safety of the double-phase pulse circuit is achieved.

The invention discloses a linear accelerating tube ignition monitoring system, which relates to the field of linear accelerators, and comprises a modulator, a microwave source, a waveguide system, a bent waveguide, an accelerating tube, a photosensitive device and a synchronizing signal generation unit, and the modulator is used for generating high-voltage pulses and exciting the microwave source to generate microwaves. According to the invention, the light sensing device is combined with the synchronizing signal output by the modulator, so that the real-time monitoring of whether the accelerating tube is sparking in each pulse is realized, the monitoring timeliness and accuracy are greatly improved, and any sparking phenomenon in the operation process of the accelerating tube can be quickly found and processed; when it is detected that ignition occurs in the accelerating tube, the system can judge the intensity of ignition according to the intensity of the light signal received by the light sensing device, and the quantitative evaluation mode helps operation and maintenance personnel to better understand the operation state of the accelerating tube and take corresponding maintenance measures according to the operation state.

According to the direct-current fixed-frequency ignition circuit for the aero-engine and the ignition control method of the direct-current fixed-frequency ignition circuit, in the ignition circuit, the input end of a front-stage DC-AC inverter booster circuit is connected with a direct-current power source, and the output end of the front-stage DC-AC inverter booster circuit is connected with the input end of a rear-stage high-voltage circuit; the output end of the rear-stage high-voltage circuit is connected to an ignition electric nozzle of the aero-engine and the sampling input end of the frequency stabilization control circuit, and the output end of the frequency stabilization control circuit is connected to the reset end of a control chip in the front-stage DC-AC inverter booster circuit. The direct-current fixed-frequency ignition circuit filters noise signals in direct-current electric energy through a front-stage DC-AC inverter booster circuit, converts input low-voltage direct-current electric energy into high-voltage pulse electric energy and transmits the high-voltage pulse electric energy to a rear-stage high-voltage circuit, and the high-voltage pulse electric energy is stored and released through the rear-stage high-voltage circuit so as to break down a discharge medium of an ignition electric nozzle. And sampling the high-voltage pulse electric energy released by the post-stage high-voltage circuit through the frequency stabilization control circuit, and forming a control signal for controlling the reset end of a control chip in the pre-stage DC-AC inverter booster circuit through a sampling signal. According to the technical scheme, the problems that the ignition frequency and the ignition energy of an existing fixed-frequency ignition circuit fluctuate under the influence of factors such as input voltage changes and temperature changes, so that the service life of the fixed-frequency ignition circuit is shortened, and performance is prone to decline or fail are solved. And the ignition efficiency and the working performance of the engine are influenced.

The invention discloses a method for treating goose meat quality by regulating and controlling a pulsed electric field through protonation signal amplification, which is characterized by comprising the following steps: (1) cutting fresh goose meat into blocks, and soaking the blocks in a lactic acid solution with the mass concentration of 30% for 45 minutes; and (2) performing high-voltage pulse electric field treatment on the goose meat obtained in the step (1) for 1 minute under the conditions that the intensity is 15kV / cm, the pulse number is 9, the frequency is 60-100Hz, and the treatment time is 1 minute, so that the quality regulation and control of the goose meat are completed, and the method has the advantages that a protonation signal change program in the pulse electric field treatment process is simple, convenient, economical and feasible, and the improvement of various qualities such as flavor, tenderness, water and oil retention and the like of the goose meat product is synchronously realized.

The invention relates to a UV power supply starting control method, device and equipment and a storage medium, and the method comprises the following steps: carrying out the initial temperature scanning of a target UV lamp tube through a preset sensor, and obtaining the initial temperature data; working condition parameters of a target UV lamp tube are obtained, the target UV lamp tube is preheated based on the initial temperature data and the working condition parameters, and a preheating completion signal is obtained; triggering the starting circuit through the preheating completion signal, applying a high-voltage pulse to the target UV lamp tube based on the starting circuit, and monitoring the lightening state of the target UV lamp tube in the process of applying the high-voltage pulse; when the lighting state is abnormal, the feedback control circuit dynamically adjusts the high-voltage pulse based on the abnormal condition so as to ensure that the target UV lamp tube can be normally lighted, and the problems that dynamic feedback adjustment is lacked in the starting process, abnormal changes of the lamp tube state cannot be coped with in time, and the service life of the target UV lamp tube is prolonged are solved. And the risk of starting failure is high.

The invention provides a nitric oxide generating device, and relates to the technical field of medical instruments, the nitric oxide generating device comprises an air input module, a nitric oxide generating module and a harmful gas filtering module which are connected in sequence, the nitric oxide generating module comprises a high-voltage pulse arc generator and a reaction bin, and the output end of the air input module is connected with the air inlet end of the reaction bin; the two ends of the high-voltage pulse arc generator extend into the reaction bin to be connected with a negative electrode and a positive electrode, the high-voltage pulse arc generator is used for outputting voltage to electrolyze air between the negative electrode and the positive electrode so as to generate nitric oxide gas, and the gas outlet end of the reaction bin is connected with the harmful gas filtering module. The harmful gas filtering module filters harmful gas. Compared with a traditional method for storing and compressing the high-concentration nitric oxide gas based on a steel cylinder, the device generates the nitric oxide gas on site, high storage and transportation cost is avoided, and potential risks of the high-concentration nitric oxide steel cylinder in the transportation and use process are avoided.

The invention is applied to the technical field of food processing, and discloses a preparation method of low-temperature extraction medicinal and edible freeze-dried powder based on natural plants, and the preparation method comprises the following steps: S1, raw material pretreatment, S2, ultralow-temperature pre-cooling, S3, high-voltage pulsed electric field treatment, S4, low-temperature extraction, S5, multi-stage filtration, S6, vacuum concentration, and S7, freeze drying. According to the preparation method of the natural plant-based low-temperature extracted medicinal and edible homologous freeze-dried powder, an ultralow-temperature pre-cooling technology is adopted, an extremely low-temperature environment is created for the natural plants, possible damage to active components in the natural plants caused by high temperature is prevented from the source, a high-voltage pulsed electric field treatment means is introduced, the permeability of cell membranes can be ingeniously and remarkably improved, and the content of the active components in the natural plants is increased. And when the barrier action of the cell membrane is weakened, the extraction process becomes more efficient, so that more active ingredients can be smoothly dissolved out, damage to the active ingredients in the processing process is avoided to the greatest extent, and complete retention of the active ingredients is ensured.

The invention discloses a silicon material drying device for silicon material high-voltage pulse crushing, and relates to the technical field of silicon material drying. The silicon material drying device for high-voltage pulse crushing of the silicon materials comprises a drying bin, a pulse crushing bin is assembled at the top of the drying bin, a hot air conveying pipe is assembled at the bottom of the drying bin, a ventilation placement plate is assembled in the drying bin, and an air guide plate driven by a servo motor is assembled in the drying bin; the side face of the air guide plate is in transmission connection with a first chain wheel. According to the silicon material drying device for high-voltage pulse crushing of the silicon materials, a servo motor is started to drive an air guide plate to rotate, and when fed hot air is guided to all positions of the silicon materials, the silicon materials at all the positions can be turned over in cooperation with a first chain wheel, a chain, a fixing base, a reciprocating lead screw, a second chain wheel, a sliding block, a gear, a toothed bar, a rotating cylinder and a turning plate; and the contact area between the silicon material and hot air is increased, so that the drying efficiency of the device is improved.

The invention provides a coaxial cable sealing assembly for a discharge switch of a high-voltage pulse capacitor. The coaxial cable sealing assembly comprises an inner conductor sealing sleeve, an insulating layer sealing assembly, an outer conductor sealing assembly and a sheath sealing assembly which are used for sealing an inner conductor, an insulating layer, an outer conductor and a sheath of a coaxial cable layer by layer. Through a multi-layer sealing structure, four layers of the coaxial cable are respectively and independently sealed, and a cooling liquid and volatile gas are effectively prevented from leaking through a conductor part, so that the problems of poor air tightness, cooling liquid leakage and the like caused by insufficient air gap sealing of the conductor part of the coaxial cable in the prior art are solved; the operation reliability of the liquid cooling radiator is obviously improved; the sealing assemblies are stably fixed through threaded connection between the pressing rings and the sleeves, meanwhile, the sealing gaskets are arranged in the pressing rings, pressure is applied by rotating the pressing rings, the sealing gaskets are tightly attached to the end faces of the coaxial cables, and efficient and reliable airtight sealing is further guaranteed.

The invention discloses a novel distributed optical fiber acoustic signal acquisition device and method, a control module of the acquisition device comprises an ADC acquisition module, a PWM module, a programmable logic end and a processing system end, and the ADC acquisition module receives ADC data transmitted by an ADC processor and is sequentially connected with the programmable logic end and the processing system end for signal processing; the PWM module is connected with the radio frequency device and the power amplifier in sequence to output a high-voltage pulse modulation signal; the clock module comprises a clock synchronizer and a crystal oscillator and is driven by the control module to generate a first clock signal and a second clock signal which are in the same phase and different in frequency. A first clock signal is respectively input into the PWM module and the frequency mixer, and a second clock signal is respectively input into the ADC acquisition module and the ADC processor. According to the method, coherent fading noise can be reduced, the signal-to-noise ratio of the system is improved, the phi-OTDR system has a high-fidelity vibration signal, meanwhile, the sound wave signal reduction degree can be improved, and the distributed optical fiber vibration capture response time can be shortened.

According to the current compensation-based level shift circuit provided by the invention, one path of low-voltage pulse signal is accessed through the first level input end and the second level output end respectively, so that the two paths of low-voltage pulse signals are converted into two paths of high-voltage pulse signals; the signals are output to the current compensation circuit and the common-mode noise elimination circuit through the first level output end and the second level output end, and the output of the current compensation circuit and the output of the common-mode noise elimination circuit jointly influence the signal states of the R end and the S end in the latch. And the latch is used for restoring the high-voltage pulse signal into a floating square wave signal with the same phase as the input signal. The level shift circuit not only can resist high common-mode noise, but also has a good inhibition effect on differential-mode noise, and the stability and reliability of the level shift circuit are effectively improved.

The invention discloses application of a microelement complex in a feed additive, which comprises the following steps: mixing fresh kelp and water with the same mass as the fresh kelp, grinding and pulping to obtain kelp slurry, then adding compound enzyme into the kelp slurry, stirring and mixing uniformly, continuously adding boric acid and ammonium molybdate tetrahydrate under a magnetic field condition, stirring and mixing uniformly, and carrying out enzymolysis and chelation under an ultrasonic condition; sequentially adding zinc sulfate heptahydrate, ferrous sulfate heptahydrate, copper sulfate pentahydrate, cobaltous sulfate heptahydrate and manganese sulfate tetrahydrate while stirring, carrying out chelation reaction under a magnetic field condition, and centrifuging to take supernatant, so as to obtain a seaweed chelating solution; then adding maltose into the seaweed chelating liquid, uniformly stirring and mixing, continuously adding sodium selenite, and carrying out chelation reaction under the condition of a high-voltage pulsed electric field; and finally, continuously adding a beta-calcium polymalate aqueous solution under a magnetic field condition, carrying out ultrasonic oscillation treatment, and carrying out spray drying to obtain a complex of trace elements. The obtained complex of the trace elements can be used for preparing a feed additive, raw material sources are safe, and the complex has an obvious promoting effect on animal growth.

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.