528 results about "Voltage pulse" patented technology

A scan driving method for rendering a high-contrast image, for use in a cholesteric liquid-crystal display device, is provided. The cholesteric liquid-crystal display device includes a display panel and a driving circuit section. The method includes: utilizing the driving circuit section to sequentially activate each scanning electrode using a modified pulse-width modulation (PWM) scanning procedure including a first stage, a second stage, and a third stage in sequence; and utilizing the driving circuit section to apply one or more alternating-current (AC) voltage pulses to pixel circuits on a first scanning electrode during the first stage to manipulate grayscale values of the pixel circuits thereon to be written in the second stage. During the first stage of the first scanning electrode, the pixel circuits on the remaining scanning electrodes within the third stage sense a zero voltage during a high-voltage period within the first stage of the first scanning electrode.

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.

Methods and systems are disclosed for depositing aluminum nitride thin films by reactive sputtering using a sequence of negative-polarity voltage pulses applied to an aluminum target, followed by a positive-polarity voltage pulse. HiPIMS-type waveforms may be used to implement the negative-polarity and / or positive-polarity pulses. A substrate is provided in a sputtering chamber, a process gas comprising an inert gas and a nitrogen-containing gas is introduced, and the chamber is maintained at a reduced pressure. A sequence of negative-polarity voltage pulses is applied to an aluminum target, followed by application of a positive-polarity voltage pulse to the target. The disclosed methods and systems can produce aluminum nitride thin films exhibiting improved crystallinity, thermal conductivity, and surface quality at reduced deposition temperatures (e.g., below 200° C.) and with deposition rates of at least about 50 nm / min suitable for industrial applications.

A series-type hybrid circuit breaker to provide protection against short circuit faults in DC or AC power circuits. A series-type hybrid circuit breaker (SHCB) forces a fault current into a high-frequency AC current with zero crossings and allows a mechanical circuit breaker to disconnect the faulty branch. The SHCB injects a transient counter voltage pulse via a pulse transformer into the main power loop upon detection of an overcurrent condition and forces the fault current to change its original direction and cross zero to a negative peak value. A generation power electronic circuit on the primary side of the transformer controls the discharge of a capacitor to generate the counter voltage pulse during the first phase of each switching cycle of the fault interruption process. The power electronic circuit then changes the polarity of the injected secondary voltage and forces the fault current to change direction and cross zero again.

Techniques are described herein for improving the burst operation of flyback power converters. The techniques provide a burst mode that delivers voltage pulses to a switching element with decreased power losses (e.g., greater switching efficiency). The efficiency of the power converter can be improved by capping the number of pulses to be delivered in a given burst packet and instituting a fixed delay to limit the power delivery. The pulses may be delivered during valleys of the signal at the switching terminal of the switching element to reduce switching losses. Additionally, a frequency clamp circuit is also provided to ensure the switching frequency is not above a predetermined threshold frequency. A device designed to implement the improved burst operation includes a burst control circuit, a pulse control circuit, a delay control circuit, and a latch.

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.

The present invention provides a plasma processing device for efficiently performing plasma processing. This plasma processing device includes a chamber, a substrate support part disposed in the chamber and including a lower electrode, an upper electrode disposed above the substrate support part, an RF signal generator electrically connected to the upper electrode or the lower electrode and configured to generate an RF signal for generating plasma in the chamber, a voltage signal generator electrically connected to the lower electrode and configured to generate a voltage signal having a voltage pulse sequence, a rectifier element electrically connected between a ground potential and the upper electrode, and a voltage phase adjustment element electrically connected, between the ground potential and the upper electrode, in series with the rectifier element.

To realize an inexpensive and miniaturized test device for electrical and electronic equipment. [Solution] The present invention proposes an electrical and electronic equipment testing apparatus for housing an electrical and electronic equipment to be tested in an internal space and testing the electrical and electronic equipment, comprising: a voltage connector to which voltage is applied via a coaxial cable; a housing that includes the voltage connector at its end, constitutes an outer conductor, and forms an internal space; and an inner conductor provided inside the housing, extending from the coaxial conductor of the voltage connector, and constituting a conductor septum, wherein a resin-based insulating material that suppresses the discharge of high-voltage pulses is filled in a predetermined range from the end, determined based on the applied voltage and the distance from the inner conductor to the outer conductor.

The invention relates to the field of electrical equipment detection, in particular to a transformer partial discharge detection method and system based on optical signal characteristics. The method comprises the following steps: acquiring an optical signal generated by partial discharge in the transformer and converting the optical signal into a voltage pulse signal; synchronizing the signal with the power frequency voltage of the transformer, and recording the peak amplitude of each pulse signal and the corresponding power frequency voltage phase angle to form a discharge data point set; carrying out statistical distribution analysis on the phase angles of the data points in a power frequency period of 0-360 degrees, and extracting a characteristic phase interval representing a discharge phase aggregation rule; and matching the characteristic phase interval with a predefined discharge type discrimination rule, and determining the partial discharge type. The method solves a problem that a conventional optical detection method cannot accurately recognize the partial discharge type of the transformer, is high in electromagnetic interference resistance, and improves the detection precision and engineering practicality.

There is provided a plasma processing apparatus comprising: a plasma processing chamber; a substrate support disposed in the plasma processing chamber, the substrate support including: a base, a ceramic member disposed on the base and having a substrate support surface and a ring support surface, one more annular members disposed on the ring support surface to surround a substrate on the substrate support surface, first and second central electrodes inserted into the ceramic member, first to fourth vertical connectors inserted into the ceramic member, first and second annular connectors inserted into the ceramic member, and a central heater electrode inserted into the ceramic member; a DC power source electrically connected to an outer region of the first annular connector through the third vertical connector; and a voltage pulse generator electrically connected to an outer region of the second annular connector through the fourth vertical connector.

This disclosure provides a signal monitoring method and apparatus, electronic devices, computer-readable storage media, and computer program products applicable to an electro-optic modulator. The signal monitoring method includes inputting a modulated voltage signal to the modulation circuit of an electro-optic modulator, the modulated voltage signal being obtained by superimposing a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wavelength voltage Vpi of the electro-optic modulator and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal; obtaining a photoelectric conversion detection signal corresponding to the output optical signal of the electro-optic modulator; and monitoring the presence of the pulse voltage signal in the modulated voltage signal based on the photoelectric conversion detection signal.

The invention belongs to the technical field of arc plasma power supplies, and particularly relates to a regulation and control method and system for a direct-current arc plasma power supply, and the method comprises the steps: providing a power supply circuit system which comprises a direct-current power supply module, an inversion rectification module, a voltage compensation module, a steady-current inductor and an arc load which are connected in sequence, and a current negative feedback drive control circuit and a voltage positive feedback drive control circuit. The current negative feedback driving control circuit adjusts the output voltage of the inversion rectification module in a negative feedback mode so as to change the output current. When the forward fluctuation of the voltage pulse of the arc load exceeds the output voltage of the inversion rectification module by a certain proportion, the voltage positive feedback driving control circuit performs voltage compensation by controlling the voltage compensation module; the arc breaking problem caused by large fluctuation of accidental pulse of load voltage is fundamentally solved, stable operation of the arc load can be effectively guaranteed, and the production efficiency and the product quality are improved.

A memory device includes a memory array with a plurality of memory cells formed at respective intersections of a plurality of wordlines and a plurality of bit lines. The memory device further control logic to initiate a program operation on one or more memory cells in a first block of the memory array, the program operation comprising a program phase, a program recovery phase, and a program exit phase. The control logic further causes a positive voltage pulse having a fixed duration to be applied to at least a subset of a plurality of bitlines of the memory array during the program exit phase of the program operation and causes the positive voltage pulse having the fixed duration to be applied to an access line controlling one or more drain-side select gate devices in the first block of the memory array during the program exit phase of the program operation.

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.

An exemplary embodiment of the present invention can provide a method of manufacturing a graphene film, including preparing a substrate including a carbon layer in a chamber, and forming a graphene layer by forming plasma in the chamber and applying a positive voltage pulse to the substrate.

The application discloses a GIS insulator partial discharge charge on-line detection method and system, and relates to the technical field of charge detection.The method comprises the following steps: according to a GIS simulation model, simulating the electric field distribution of charge generation in the partial discharge process, determining the performance index of the required electric field sensing probe, and preparing the electric field sensing probe; according to an epoxy resin model, obtaining the charge density, the charge distribution range and the electric field signal collected by the electric field sensing probe under different voltage pulses, and constructing a test data set; according to the GIS simulation model, obtaining the electric field signal under different charge densities and different charge distribution radii, and constructing a training data set; training a neural network model according to the training data set, and correcting according to the test data set; and collecting the partial discharge electric field signal by using the electric field sensing probe array arranged on the outer wall of the GIS insulator, and obtaining the charge density and the charge distribution range on the surface of the insulator by using the neural network. Non-invasive and non-contact on-line measurement is realized.

The application discloses an electrostatic protection device simulation device and simulation method, comprising: establishing an electrostatic protection device model; setting a plurality of parameter values corresponding to parameters, setting a plurality of current pulse signals input into the electrostatic protection device based on different parameter values, the parameters including working temperature; inputting the parameter values into the electrostatic protection device model, applying a plurality of different current pulse signals corresponding to the parameter values to the electrostatic protection device model, respectively simulating the electrostatic protection device, and outputting voltage pulse signals; generating I-V characteristic curves corresponding to the parameter values based on the plurality of current pulse signals and the plurality of voltage pulse signals corresponding to the parameter values. The electrostatic protection effect can be verified before chip manufacturing, the simulation precision is high, the design cost of the electrostatic protection device is greatly reduced, the influence effect of the working temperature on the electrostatic protection device can be obtained, and thus the optimal working temperature of the electrostatic protection device can be obtained.

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 relates to the technical field of high-voltage pulse object crushing, in particular to an object electric crushing method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring first object information and crushing demand information of a first object; a target crushing strategy determination model is adopted to identify the first object information and the crushing demand information, a crushing strategy corresponding to the first object is obtained, and different crushing strategies correspond to different pulse information; under the condition that it is determined that the first object is placed in the solution of the target material bin, the first object is smashed through the smashing strategy, and a second object is obtained. The situation of excessive dissociation can be reduced, equipment abrasion is reduced, the equipment operation stability is improved, and the object smashing accuracy is improved.

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.

Systems and methods to detect a polynucleotide strand in a sample during the early stage of amplification cycles. A metal-insulator-metal (MIM) electrode unit with two metal electrodes separated by a dielectric layer may be utilized as a nanogap sensor. Primers for amplifying a target polynucleotide strand may be immobilized on the surface of the dielectric layer. Polymerases, nucleotides, templates and primers may be added to the sample. At least one type of nucleotide may be labeled with a redox label that may enhance electron transport through the nanogap via tunneling and / or diffusion-based redox cycles. Signals (e.g., voltage pulses) may be directed through each of the electrodes. Current values from each electrode may be measured to establish a baseline signal. Alterations in the baseline signal may indicate the presence of target polynucleotide strands. The time to detect an alteration in the baseline signal may facilitate quantification of target polynucleotide strands.

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 relates to the technical field of power supply circuits, and discloses a point-to-point high-voltage POC power supply circuit control method. According to the method, a power supply end and a power receiving end are included, the power supply end is connected with the power receiving end through a coaxial cable, and the power supply end is provided with a control logic device U1, a high-voltage power supply switch MOS1, a pulse detection switch MOS4, a graded pulse voltage detection resistor R1 and a power supply current and voltage detection resistor R2. The power receiving end is provided with an adjustable time interval pulse generation device U2, a pulse control circuit and a load resistor; a power supply link is established through a low-voltage pulse detection mechanism, a high-voltage power supply mode is switched after a power receiving end equipment type and power supply parameters are determined through negotiation, and overcurrent and overvoltage protection is realized at the same time. According to the application, the POC circuit power supply capability is increased, POC power supply protection is provided, the private protocol is added to negotiate and control the power supply power, and simple grading can be matched with various types of power equipment.

The invention is applied to the technical field of automatic control, and relates to a laser power control device and method, computer equipment, a readable storage medium and a program product. The device comprises a spectroscope which is used for carrying out light splitting on a laser processing signal of a laser transmitter to obtain a target laser signal; the photoelectric sampling module is used for converting the target laser signal into a voltage pulse signal; the data processing module is used for converting the voltage pulse signal into a digital pulse signal and detecting pulse signal energy information of the digital pulse signal; and the upper computer is used for controlling the laser transmitting power of the laser transmitter according to the pulse signal energy information. The device can support accurate control of laser power.

This invention discloses a hydrogen-based electrical discharge machining (EDM) system, relating to the field of EDM. The system includes: a contact detection system for detecting the contact state between the electrode and the workpiece and outputting the contact detection signal to the machining control system; a detection switching system for switching between machining and detection modes, receiving switching commands from the machining control system, and connecting the electrode and workpiece to either the contact detection system or the EDM system; and a pulse voltage system for providing low-voltage pulse discharge energy. Compared with existing technologies, the advantages of this invention are: by comprehensively utilizing a special mechanical structure of a dual-slide stage, a rapid switching circuit, hydrogen as a reducing working medium, and low-voltage pulse capacitor discharge technology, this invention systematically solves the four inherent bottlenecks of traditional gas EDM: high voltage dependence, surface oxidation and degradation, servo return error, and process monitoring lag. Ultimately, it achieves high-precision, high-quality, high-efficiency, and inherently safe precision EDM.

To provide a technique for controlling energy of ions colliding with a substrate by a voltage pulse applied to a bias electrode.SOLUTION: The disclosed plasma processing apparatus includes a chamber, a substrate support, a plasma generator, and a bias power supply. The substrate support includes a bias electrode and is provided in the chamber. The plasma generating unit is configured to generate plasma from a gas in the chamber. The biasing power supply is electrically connected to the biasing electrode and configured to generate a sequence of a plurality of voltage pulses. Each of the plurality of voltage pulses has a leading edge period transitioning from a reference voltage level to a pulse voltage level and a trailing edge period transitioning from the pulse voltage level to the reference voltage level. At least one of the time length of the leading edge period and the time length of the trailing edge period is longer than 0 seconds and equal to or shorter than 0.5 μ seconds.SELECTED DRAWING: Figure 1

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.

This invention relates to the field of neuromorphic computing technology and provides a method and system for dynamic adjustment of synaptic weights in real-time neurofeedback for neuromorphic chips. The method includes: capturing the pulse signals and timestamps emitted by presynaptic and postsynaptic neurons; calculating the time difference between the presynaptic and postsynaptic pulses; when the absolute value of the time difference is less than a preset time window threshold, querying a pulse timing dependency plasticity rule base based on the sign of the time difference to determine the corresponding synaptic weight adjustment type; generating corresponding voltage pulse parameters based on the adjustment type and the current conductance state of the target memristor synapse; and applying a write voltage pulse to the target memristor synapse according to the voltage pulse parameters to adjust its conductance value in situ in real time, thereby dynamically updating the synaptic weights. This invention solves the problems of poor dynamic environment adaptability, low energy efficiency, and high learning latency caused by traditional offline weight update mechanisms.