386 results about "High voltage pulse" patented technology

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 particulate matter resistance detection system based on high-voltage pulse self-cleaning and a control method, and relates to the technical field of diesel vehicle emission post-processing. A connecting wire harness comprises a high-voltage heat-resistant wire harness and a signal shielding wire which are respectively used for transmitting a high-voltage pulse signal, a resistance detection signal and a temperature acquisition signal; the sensor probe is connected with the controller module; the Baud rate of the CAN communication interface is 500 kbps, the CAN communication interface supports a UDS diagnosis protocol, can be connected into an OBD-II system and is used for transmitting a detection result to a whole vehicle ECU, and the control method comprises the processes of instantaneous high-voltage pulse cleaning, bias voltage adsorption, dynamic resistance monitoring, temperature compensation and result output. According to the invention, the cleaning time is less than 1 second, the single detection period is less than or equal to 60 seconds, the service life of the sensor is prolonged to more than 5 years, the energy consumption is less than or equal to 1.8 W, the distance between electrodes reaches 10-50 microns, and the temperature detection deviation is + / -0.2 DEG C, so that the requirement on real-time monitoring of a diesel particulate filter (DPF) in national sixth and above emission standards can be met.

A heavy medium pre-separation efficient fixed separating screen comprises a control assembly, a magnetic separation and flow guide integrated assembly and a supporting frame and is characterized in that a cavity with an opening in the upper end is formed in a frame body of the supporting frame, a fixing plate is fixed to a ground fixing piece through bolts, and the control assembly is of an integrated structure and can control the magnetic separation and flow guide integrated assembly according to real-time data of materials. A flow guide groove of the magnetic separation and flow guide integrated assembly is of a downwards-inclined trapezoidal structure with the front portion wide and the rear portion narrow, a magnetic separation roller is arranged above the flow guide groove, a medium recycling groove is formed below the magnetic separation roller, and a U-shaped scraper is arranged in a discharging area of the magnetic separation roller. A sieve plate I and a sieve plate II which are respectively supported by a sieve frame I and a sieve frame II and incline downwards are arranged in the cavity, the upper layer is provided with slot-shaped sieve holes, and the lower layer is provided with circular sieve holes, so that the problems that an integrated control assembly, a magnetic separation and flow guide integrated assembly, a high-voltage pulse cleaning assembly and the like cannot be used are effectively solved.

The invention discloses a modularized low-temperature plasma logistics fresh-keeping device and method, and the device comprises at least one low-temperature plasma discharge module which comprises an insulating fixed frame, and a metal mesh electrode and at least one point discharge electrode which are fixed on the insulating fixed frame, the point discharge electrode is provided with a cylindrical side wall, the axis of the point discharge electrode is perpendicular to the metal mesh electrode, a plurality of conductive points are uniformly distributed at the end, facing the metal mesh electrode, of the cylindrical side wall, and a certain distance is reserved between the conductive points and the metal mesh electrode; the pulse direct-current high-voltage module is used for outputting high-voltage pulses to the low-temperature plasma discharge module; the infinite loop on-off module is used for periodically controlling on-off of the pulse direct-current high-voltage module; and the low-voltage direct-current power supply provides low-voltage direct current for the pulse direct-current high-voltage module and the infinite loop on-off module. The fresh-keeping device adopts a discharge mode which is simple in structure, high in energy density and easy to modularly integrate, and can be integrated in a logistics transportation system for fresh keeping of fruits and vegetables.

This invention discloses a modular essential oil pulse atomizing core and its corresponding essential oil diffuser, belonging to the field of diffuser equipment. It aims to solve the problems of existing essential oil diffusers, such as limited atomization modes, rapid particle settling, easy clogging of pipes, easy deterioration of essential oils, and high maintenance costs and difficulty in adapting to essential oils of different viscosities due to the integrated packaging of the atomizing core. The atomizing core integrates a high-voltage pulse electrode group and an ultrasonic atomizing component to form a multi-stage atomization module, with an essential oil storage section and an essential oil supply section. It adopts a modular, pluggable structure and is equipped with a magnetic power supply interface component. The accompanying diffuser includes an exhaust duct, exhaust fan, control circuit board, and sensor module, which can intelligently adjust the atomization state according to environmental parameters. This invention can generate fine and uniform atomized particles at room temperature, is compatible with multiple types of essential oils, eliminates the risk of clogging and essential oil deterioration at the source, and the modular pluggable design significantly reduces maintenance difficulty and cost, making it suitable for various indoor diffuser scenarios.

The invention provides a high-voltage pulse generator based on a signal trailing suppression design, which is characterized by comprising n stages of Marx booster circuits which have the same structure and are connected in sequence, and n is an integer and is greater than or equal to 2; the ith Marx booster circuit comprises a charging current-limiting resistor Ri, a capacitor Ci, a field effect transistor MOSFETi and an ith discharging circuit, and i = 1,..., n; the ith discharge circuit comprises two parallel discharge circuits; the first discharge circuit in the two parallel discharge circuits comprises a discharge current limiting resistor Ri + n and a field effect transistor MOSFETi + n; the second discharging circuit in the two parallel discharging circuits comprises a discharging current-limiting resistor Ri + 2n and a field effect transistor MOSFET (Metal Oxide Semiconductor Field Effect Transistor) i + 2n; and the discharge current-limiting resistor Ri + n and the discharge current-limiting resistor Ri + 2n have different resistance values. According to the high-voltage pulse generator provided by the invention, rapid discharge can be realized by controlling the on-off of the field effect transistor MOSFET, the falling edge is further shortened, and high-voltage pulses with narrower pulse width are generated while the type selection limitation on resistors and switching devices is reduced.

The invention provides an extraction method of coconut globulin, and relates to the technical field of coconut protein extraction. The method for extracting the coconut globulin comprises the following steps: removing albumin from defatted coconut powder by using distilled water, performing nitrogen pressure-boosting drying, mixing with a NaCl solution with relatively low concentration, performing high-voltage pulse electric field circulation treatment, stirring and extracting the NaCl solution, freeze-drying, redissolving, dialyzing and purifying to obtain the coconut globulin. According to the method, the defects in the prior art are overcome, and the extraction rate of the coconut globulin and the purity of the final product are improved while the good stability and emulsibility of the coconut globulin are ensured.

The application discloses a Marx high-voltage pulse power supply based on a high-gain boost type DC-DC converter, and the circuit is composed of an input DC power supply, two power switching tubes, a switching inductor and a cascaded Marx generator; the cascaded Marx generator can be expanded to n levels, and can be used in application occasions requiring high-voltage pulse power supplies, such as cancer treatment in medical treatment, water treatment, waste gas treatment, sterilization, electron and ion beam generation and acceleration, electrostatic dust removal and the like. Under the same working condition, the Marx high-voltage pulse power supply can realize high-gain pulses, and compared with the existing Marx high-voltage pulse power supply, can realize lower switching power loss and higher voltage gain. Meanwhile, the Marx high-voltage pulse power supply also has the advantages of simple topological structure, few modules, few electronic devices and low cost. Therefore, the Marx high-voltage pulse power supply has important economic value and practical engineering significance.

The invention discloses a device for noninvasive regulation and control of a blood brain barrier in a non-invasive pulsed electric field. The device comprises a high-voltage pulse generator, a plurality of treatment electrodes and a fixing device. The connection tightness of endothelial cells is adjusted through a high-voltage short-pulse electric field, local regulation and control of the brain area are achieved in combination with electrode design, pulse parameters are flexibly adjusted to balance the effect and damage, and a new non-invasive physical treatment means is provided for assisting drug cross-blood-brain-barrier delivery. Compared with focused ultrasound, the multi-mechanism synergistic effect (electroporation effect and bioelectrochemical effect) is utilized instead of depending on the mechanical effect of exogenous microbubbles, so that the safety risk is remarkably reduced. The system has the advantages of noninvasiveness, safety and space flexibility, and can be opened for a long time. The non-invasive electrode is used for delivering instantaneous high-voltage electric pulses, which is different from conventional low-voltage long-time electric stimulation.

The invention provides a high-voltage starting device for a high-pressure gas discharge light source, and the device comprises a power access unit which is used for accessing an external AC power supply; the power supply protection unit automatically cuts off the power supply when the circuit is short-circuited, overloaded or abnormal in voltage; the energy storage resonance unit is electrically connected with the power supply protection unit and comprises an energy storage capacitor and a ballast inductor, and the energy storage capacitor and the ballast inductor form a series resonance circuit; the trigger control unit is connected with the energy storage resonance unit in parallel and comprises a gas discharge trigger tube, and the gas discharge trigger tube is conducted when the voltage at the two ends of the energy storage capacitor reaches a breakdown threshold value; the circulation control unit is connected between the energy storage resonance unit and the high-pressure gas discharge light source in series and comprises a double-metal heat piece switch, and the double-metal heat piece switch is bent and disconnected due to the heat effect when high-voltage pulses flow through and then a loop is closed after cooling and resetting. And the high-voltage output unit is connected with the circulating control unit and the high-voltage gas discharge light source. The starting time of the high-pressure gas discharge light source can be shortened, and the test preparation time is shortened.

A HP-generator (10) configured to deliver pulsed high power with a high voltage and / or high current to a capacitive load (8), particularly for a plasma process (9), comprising: a) a RF generating unit (3) in a first housing (42), configured to deliver RF power at an RF power output, b) a HV-pulsing unit (1) in a second housing (43), configured to generate pulsed high power using the RF power from the RF generating unit (3) and to supply this pulsed high power at an HV pulsing output, c) an RF power path for conducting RF current (47) from the RF generating unit (3) to the HV-pulsing unit (1), the RF-power-path (44) including a path filter element (45) with at least one inductive filter element (46), wherein the inductive filter element (46) is arranged to direct the RF current (47) from the RF generating unit (3) to the HV-pulsing unit (1) at least partially through the inductive filter element (46).

This invention provides a high-voltage pulse ablation system integrating energy transmission and real-time temperature monitoring. It includes a catheter with several electrodes, each equipped with a temperature sensing unit. A temperature monitoring unit corresponds one-to-one with each temperature sensing unit, and their ends are electrically connected via a first wiring harness and a second wiring harness. The high-voltage pulse signal generated by the main unit's pulse module is transmitted to the corresponding electrode via the first or second wiring harness of the temperature monitoring unit corresponding to that electrode, and is also transmitted back to the pulse module via the first or second wiring harness of the corresponding temperature monitoring unit of any other electrode. The temperature monitoring unit synchronously couples and filters out common-mode interference generated by the high-voltage pulse signal using the first and second wiring harnesses, and performs temperature measurement based on the differential signal obtained from the temperature sensing unit via the first and second wiring harnesses. This invention significantly reduces the catheter's outer diameter and enhances its flexibility and vascular permeability.

The application discloses a pulse source for SiC MOSFET high-field stress reliability test, which comprises a main switch circuit, a high-voltage module, a driving circuit and an auxiliary power supply; the main switch circuit is connected with the high-voltage module and the driving circuit respectively, and the driving circuit is connected with the auxiliary power supply; the high-voltage module provides high voltage with sufficient power for the main switch circuit; the auxiliary power supply is used for providing various required voltages for the driving circuit; the driving circuit provides a gate driving signal with sufficient power for the main switch circuit; the main switch circuit bears high voltage output by the high-voltage module, performs switching action according to the gate driving signal output by the driving circuit, and outputs a specified high-voltage pulse waveform. The application can apply drain-source voltage with a voltage change rate as high as several thousand volts to SiC MOSFET high-field stress reliability test, and the voltage pulse waveform is controllable, and the application has the advantages of small size, high voltage resistance, simple driving, high power density and the like.

The invention discloses a pi-shaped chip high-voltage pulse attenuation network resistor and a manufacturing method thereof, and belongs to the technical field of electronic components. The network resistor structure comprises a ceramic substrate, a resistive layer, a resistive layer R1, a resistive layer R2, a resistive layer R3, a surface electrode, a back electrode, a side electrode, an electrode nickel-plated layer, an electrode lead-tin-plated layer, a glass protection layer and an epoxy resin layer. The manufacturing method comprises the following steps: printing a surface electrode on the upper surface of a ceramic substrate, printing a back electrode on the lower surface of the ceramic substrate, printing a resistive layer bridged on the surface electrode, printing protective glass on the resistive layer, carrying out laser resistance trimming on the resistive layer, printing an epoxy resin protective layer and a mark on the protective glass, and sputtering a metal layer on the end surface. And preparing an electrode nickel-plated layer and a lead-tin-plated layer on the end surface. The problems that in the prior art, overheat burnout is likely to occur, electrodes are likely to be eroded in a humid or sulfur-containing environment, and the manufacturing precision and stability are difficult to improve and control are solved. The resistor is widely applied to the technical field of attenuation network resistors.

The utility model provides a kind of ultrasonic flaw detection system, in the system, controller controls transmitting circuit to generate high voltage pulse;High voltage circuit provides high voltage power supply for transmitting circuit;Transmitting circuit emits high voltage pulse to transducer, drives transducer to emit ultrasonic signal;Transducer emits the ultrasonic signal of set frequency to the sample to be measured, and receives the flaw detection echo signal returned by the sample to be measured, conversion is input to gain amplifier circuit as electric signal;Gain amplifier circuit carries out gain amplification processing to the electric signal corresponding to flaw detection echo signal;Analog-digital converter carries out analog-digital conversion to flaw detection echo signal, obtains flaw detection echo digital signal, and input to controller.The utility model improves system structure, realizes the feature information extraction and noise reduction processing of high-speed echo signal, also improve the signal-to-noise ratio of echo signal, effectively solve the problem of system missed detection caused by small sample defect, weak echo signal.

A system for noninvasive regulation and control of blood brain barrier permeability through a transcranial pulsed electric field comprises a high-voltage pulse generator and a plurality of treatment electrodes. The connection tightness of endothelial cells is adjusted through a high-voltage short-pulse electric field, local regulation and control of the brain area are achieved in combination with electrode design, pulse parameters are flexibly adjusted to balance the effect and damage, and a new non-invasive physical treatment means is provided for assisting drug cross-blood-brain-barrier delivery. Compared with focused ultrasound, the multi-mechanism synergistic effect (electroporation effect and bioelectrochemical effect) is utilized instead of depending on the mechanical effect of exogenous microbubbles, so that the safety risk is remarkably reduced. The method has the advantages of noninvasiveness, high efficiency and safety, and can achieve a multi-mechanism synergistic effect. The non-invasive electrode is used for delivering instantaneous high-voltage electric pulses, which is different from conventional low-voltage long-time electric stimulation.

The application provides a spatial sound field real-time generation device based on a light-controlled programmable ultrasonic phased array, realizes continuous phase modulation and amplitude control of array elements, does not need to separately configure a high-voltage pulse circuit or an independent amplifier for each channel, thereby guaranteeing the compactness of the system structure and the low power consumption advantage; the light-controlled phase shift unit independently controls the phase of each ultrasonic element by adjusting the light intensity, realizes accurate regulation and control of the wave front direction; the overall layout of the array and the power input are kept synchronous, thereby guaranteeing the controllability of the amplitude and energy output of the ultrasonic field; the application decouples the phase control and the power driving, effectively avoids the complex wiring problem of multi-channel synchronous control, and improves the flexibility and scalability of array operation; in addition, the introduction of the light-controlled mode significantly simplifies the array driving circuit, realizes parallel control of a large-scale array, and thereby forms an ultrasonic field generation device with high compactness, excellent controllability and high flexibility.

The invention discloses a high-voltage pulse power supply based on a combination mode of a super capacitor and a thin-film capacitor. Comprising a DSP signal processing and control circuit, a man-machine interaction module, a communication and external control input circuit, a mains supply alternating current input and common mode filtering module, an isolation type super capacitor energy injection system, a medium-voltage super capacitor energy storage unit, a non-isolation type booster circuit, a high-frequency filtering circuit and a high-voltage thin-film capacitor energy storage unit. The system comprises an output high-voltage electronic switch, an isolation driving circuit, a multi-point voltage and current detection circuit and a system power supply module. According to the invention, a super capacitor and a thin-film capacitor are mainly used as a secondary energy storage core, and the imbalance phenomenon of a conventional hybrid energy storage system of a super capacitor, an electrolytic capacitor and a thin-film capacitor is avoided through the isolation of voltages and impedances at all levels; and the service life of the super capacitor is prolonged.

The invention discloses hardware breakdown equipment powered by intelligent equipment. The hardware breakdown equipment comprises a high-voltage test host, a clamp assembly and a test module, the clamp assembly comprises an energy storage test interface plugged with an interface of the intelligent equipment to be tested, and the energy storage test interface is used for communicating with the intelligent equipment to be tested and obtaining electric energy from the intelligent equipment to be tested; the test module comprises an electromagnetic radiator which is used for converting high-voltage pulses into directional strong electromagnetic radiation and transmitting the directional strong electromagnetic radiation to a corresponding mainboard position; power is directly taken from the to-be-tested intelligent equipment through the energy storage test interface, an external power supply does not need to be additionally deployed or a built-in battery does not need to be relied on, and an electromagnetic interference path can be cut off from the source, so that the accuracy of test and destruction results is improved; besides, the transmitting end of the electromagnetic radiator accurately corresponds to the position of the mainboard of the equipment to be tested, strong electromagnetic radiation converted by high-voltage pulses can be directionally focused on a target area, the utilization rate of energy is improved, the breakdown resistance can be accurately detected during testing, and the destruction time can be prolonged during destruction.

This application discloses a high-voltage pulsed ablation technique (PFA) with variable pulse width based on the ablation site, belonging to the field of high-frequency pulse control technology. The method includes selecting and confirming the ablation site on the ablation device display; switching and matching the corresponding pulse width parameters based on the confirmed ablation site; initiating and controlling ablation based on the switched and matched pulse width parameters; determining whether ablation is complete after completion; if not, restarting and controlling ablation again; if complete, determining the end of the current ablation; determining whether the ablation site needs to be changed; if not, restarting and controlling ablation again; if so, reselecting the ablation site for the next ablation. This method allows for ablation with different parameters based on different sites, resulting in less muscle tremor, more thorough tissue ablation, and a reduced recurrence probability. It does not require changes to the original hardware layout or catheter shape, only modifications to the software and algorithm.

A method for digital communication over a pulsed power supply having alternating high and low voltages in which a logic ZERO is transmitted by a low voltage pulse having a first low voltage duration tlowzero, followed by a high voltage pulse having a first high voltage duration thzero, and the logic ONE is transmitted by a low voltage pulse having a second low voltage duration tlow followed by a high voltage pulse having a second high voltage duration thlight, the method comprising detecting a parameter value of at least one parameter affecting a transition time between the high voltage and the low voltage, and adjusting the first low voltage duration, tlowzero, and the second low voltage duration, tlowone, based on the parameter value (s).

The invention relates to the technical field of industrial cleaning, in particular to an annular pulse plasma cleaning device and method for a precise instrument. According to the technical scheme, the plasma cleaning device comprises a high-voltage pulse power supply, a host device, a supporting bracket and an object carrying platform, the high-voltage pulse power supply, the host device, the supporting bracket and the carrying platform are sequentially arranged from top to bottom; the host device comprises an air valve, an outer electrode, a diagnosis port, a cylindrical inner electrode, a conical inner electrode, a solenoid, a top flange, an insulating part, a sealing part and a control computer. High-density compact ring plasma clusters are adopted for pulse type directional cleaning, cleaning uniformity is improved, heat input is greatly reduced due to the instantaneous energy deposition characteristic, damage to heat-sensitive materials is avoided, the modular generator is compact in structure and convenient and fast to maintain, accurate positioning is achieved through cooperation with X-axis and Y-axis guide rails, and the service life of the modular generator is prolonged. The device is suitable for efficient cleaning of complex structures and stubborn pollutants.

The invention relates to a device for improving the through-flow arc control of a high-voltage large-capacity gas gap switch, and the device comprises a test cavity which is used for providing a controllable gas insulation environment and serves as a carrier of a high-voltage large-current discharge test; the trigger discharge loop is used for generating a high-voltage pulse to drive the trigger cavity to generate plasma jet and induce the main gap to be broken down and conducted at a preset moment; and the large current generation loop is used for storing energy and generating a high-energy fault current simulating an actual working condition after the main gap is conducted. A main gap can form a stable and controllable initial discharge channel under high-voltage and large-gap conditions, active constraint is carried out on an arc movement track in a high-energy fault current flowing stage, and long-term residence of an arc root in a local area of an electrode is avoided, so that the ablation degree of the electrode is remarkably reduced, the through-flow life is prolonged, and meanwhile, the service life of the electrode is prolonged. A transverse magnetic field generated by the spiral groove structure enables an electric arc to rotate along the surface of the electrode, the stability of an arc column is effectively improved, and the reliability under the condition of large current flow is improved.

The invention discloses an electrode device and method for measuring space charges through pressure-electric field-temperature coupling, and the device comprises an upper electrode structure which comprises an upper connecting plate, a conductive bolt, cylindrical ceramic, and an upper electrode terminal; the bottom of the conductive bolt is fixedly connected with the upper connecting plate, and the top of the conductive bolt is provided with radial scales and can be in contact with a fixed surface of an external calibration platform through thread feeding; the lower electrode structure comprises a lower connecting plate, plate-shaped ceramic and a lower electrode terminal; the lower electrode terminal comprises a heating resistance wire; two ends of the high-voltage pulse unit are respectively connected to the upper and lower electrode terminals; the signal collecting and converting unit is connected with the lower electrode terminal; a to-be-tested sample is clamped between the cylindrical ceramic and the plate-shaped ceramic; the upper and lower connecting plates apply stress to a to-be-tested sample through engagement of connecting bolts; and a pressure sensor is arranged between each connecting bolt and the upper connecting plate. The device has the functions of pressure regulation and control and real-time measurement of the thickness of the sample, and can more accurately measure the space charge in the insulating material of the cable accessory.

The utility model relates to a kind of device of pulse laser pulse sub-string, including pulse laser, laser attenuation device, laser beam-reducing device, laser polarization device, wave sheet, Pockels cell, output mirror, waveform detection device, and output mirror is to the waveform detection device output first light beam and to the original light path reflection second light beam;Laser polarization device side is also configured full mirror;Pockels cell is connected with high-voltage pulse generator, pulse laser is also connected with digital delay pulse signal generator, and digital delay pulse signal generator is used to send synchronization signal to high-voltage pulse generator to control high-voltage pulse generator to generate voltage pulse when pulse laser emits laser beam reaches Pockels cell.This application realizes the stable control and output of pulse sub-string by the electro-optic modulation characteristics of Pockels cell, compared with traditional method of improving laser repetition frequency, implementation is simple, and use component is less, while guaranteeing stability, reduce cost.

The invention discloses an electroacoustic pulse principle-based coating debonding detector with a replaceable electrode, and relates to the field of nondestructive testing, the electroacoustic pulse principle-based coating debonding detector comprises a combined probe and a high-voltage pulse superimposer, and the combined probe comprises a detector shielding shell, a shell shielding cover, a locking ring and a combined electrode; the combined electrode comprises an electrode tip, a detection part and an electrode shielding shell, the electrode tip is fixedly connected with the electrode shielding shell, and the detection part is arranged in a closed cavity of the electrode shielding shell; the detector shielding shell is provided with an opening I and an opening II, and the shell shielding cover is detachably and fixedly connected to the opening I; the locking ring is detachably and fixedly connected to the opening II; the electrode shielding shell is arranged in an inner cavity of the detector shielding shell, the electrode tip penetrates through the locking ring, and the electrode tip is detachably and fixedly connected with the inner side wall of the locking ring; and the high-voltage pulse adder enables the direct-current high voltage and the narrow pulse to be superposed and applied to the metal substrate. According to the invention, the electrode tips with different sizes and shapes can be replaced according to the size and shape of the coating debonding area, the shielding effect is ensured, and the measurement accuracy is improved.

The invention provides an RS-485 bus passive protection device for on-line monitoring equipment of a transformer substation. The RS-485 bus passive protection device comprises a primary protection module, a primary filtering module, a residual voltage release module and a residual interference elimination module which are sequentially connected in series along an RS-485 bus signal path, all the modules are matched in sequence to provide graded protection for the RS-485 bus, the primary protection module is used for discharging high-voltage impact current generated by lightning stroke and surge, the primary filtering module is used for attenuating pulse group interference signals in the bus, the residual voltage release module is used for carrying out secondary clamping on residual high voltage and slowly releasing residual charges, and the secondary filtering module is used for carrying out secondary filtering on the residual high voltage. And the residual interference elimination module is used for filtering residual interference signals so as to ensure normal communication. The problem that high-voltage pulses such as field surges and lightning strokes break down an RS485 interface of online monitoring equipment is solved, meanwhile, interference of interference signals such as pulse groups and conducted disturbance on a bus is effectively solved, and the equipment can safely and reliably work in a complex electromagnetic environment.

A shock wave catheter includes an elongate member and a shock wave emitter assembly located at a distal region of the elongate member. The shock wave emitter assembly includes a shock absorber made of a low durometer material. A shock wave catheter system includes a shock wave catheter with a shock absorber and a high voltage power supply configured to generate high voltage pulses. A method for treating a lesion in a body lumen includes generating shock waves with a shock wave catheter system that includes a shock wave catheter with a shock absorber.

The present application relates to a kind of mine earthquake internal seismic source power similarity simulation test system and method based on metal wire electric explosion, pre-embedded metal wire electric explosion is used to form transient volume expansion seismic source in similar material model inside, it is realized by the conversion of the accurate release energy source from the external monotone extensive mechanical disturbance to model inside;Through the division of labour design of charging branch, main discharge branch, discharge branch and detection branch, make circuit organization relationship clear, protection chain is complete, it is convenient to stable implementation high voltage pulse discharge test;Through the current limiting inductance to the discharge current front and pulse width are adjusted, so that mine earthquake simulation is no longer only pay attention to total energy similarity, also consider time process similarity;The corresponding relationship between the energy of field mine earthquake event and the input electric energy of similar material model is established, the scientificity of test parameter setting is improved;Through cabinet type layered assembly, host computer software control and standardization experimental process organization, the repeatability, traceability and safety of device operation are improved.