239 results about "Current pulse" patented technology

The invention discloses a high-voltage cable operation state on-line monitoring, intelligent early warning and fault positioning system, particularly relates to the technical field of power equipment insulation monitoring, and is used for solving the problems that transient discharge signals generated in the cable insulation degradation process are difficult to effectively capture and accurate fault positioning cannot be realized in the prior art. The method comprises the following steps: collecting transient leakage current signals and traveling wave propagation characteristic parameters, performing phase correlation analysis on leakage current pulses and power frequency voltage to identify discharge types, and performing variational mode decomposition and Hilbert-Huang transform on the signals to respectively extract complexity characteristics and energy distribution characteristics; signal logic conflicts are judged by analyzing similarity and statistical distance among characteristics of a plurality of monitoring points, and collaborative diagnosis is started or traveling wave distance measurement is directly utilized to carry out insulation state evaluation and fault location. And finally, differential early warning levels are generated according to the diagnosis result, and fault line selection and positioning information is output to realize real-time monitoring, intelligent early warning and accurate positioning of the operation state of the high-voltage cable.

The invention discloses a direct current B code wave recording alarm analysis device and method based on an FPGA, and relates to the technical field of power system automation and signal analysis, and the device comprises an FPGA collection module which is used for collecting a TTL level signal of a direct current B code in real time at a preset sampling frequency, recording a high-precision timestamp of each sampling point, and carrying out the subsequent pulse parameter calculation; the pulse width measurement module is connected with the FPGA acquisition module, is used for calculating the pulse width of the current pulse based on the rising edge timestamp and the falling edge timestamp of the signal, triggering a wave recording module, and is used for starting wave recording operation when the pulse width is detected to exceed a preset threshold range or abnormity occurs for a plurality of times continuously; collecting complete waveform data before and after the fault; the DC B code wave recording alarm analysis device and method based on the FPGA improve the intelligent level, response speed and fault visualization capability of a B code monitoring system, and are especially suitable for high-reliability monitoring and management scenes of key synchronization signals in a DC system.

The invention discloses an energy-saving control method for a new-energy high-low-voltage direct-current relay. The energy-saving control method comprises the steps of analyzing a mapping relation between a silicon steel sheet stacking angle and a magnetic flux path deviation, calculating magnetic domain wall moving resistance according to magnetic domain boundary stress, determining a magnetic domain overturning speed by combining a magnetic field change rate, and measuring a hysteresis loop width parameter. Adjusting the width and frequency of the excitation current pulse according to the magnetic domain overturning frequency and the hysteresis loop offset and width to obtain an optimized excitation current pulse sequence, and determining the hysteresis loop expansion speed according to the hysteresis loop area change rate; the local high-temperature area temperature is analyzed through the iron core temperature rise rate, the local high-temperature area distribution and the magnetic domain energy dissipation data, if the local high-temperature area temperature exceeds the preset threshold value, the excitation current pulse is adjusted, stable iron core temperature rise control data is obtained, the coercive force change amplitude is determined, the magnetic hysteresis loss and the temperature rise are reduced, the stability of the relay under high-frequency switching is improved, and the reliability of the relay is improved. And the operation efficiency and reliability of the system are greatly improved.

The invention provides a voltage difference monitoring device and method for a bootstrap switching power supply and the switching power supply. The device comprises a voltage difference detection module which is configured to detect the voltage difference between the two ends of a bootstrap capacitor and generate a lower tube conduction indication signal if the voltage difference does not reach a set threshold value; the lower tube forced conduction module is configured to generate a plurality of continuous pulse signals according to the lower tube conduction indication signal so as to conduct a lower transistor when the pulse signals are in high level, so that the bootstrap capacitor is charged through the first power supply voltage until the voltage difference reaches a set threshold value; and the negative current detection module is configured to send a forced turn-off signal to the lower transistor forced turn-on module and end the turn-on period, corresponding to the current pulse signal, of the lower transistor if a negative current greater than a threshold value is detected during the period of turning on the lower transistor through the pulse signal. According to the invention, high differential pressure detection precision is realized through a simple circuit structure.

The invention discloses a cable joint discharge monitoring system, which comprises a sensing layer, a data fusion layer and an analysis layer, and also discloses a cable joint discharge monitoring method, which comprises the following steps: monitoring the high-frequency current of a cable joint, acquiring a back Raman scattering signal of laser in a distributed optical fiber by an optical time domain reflection demodulation unit, obtaining the temperature of a measuring point, and monitoring the temperature of the cable joint. The analysis layer judges whether the temperature exceeds a temperature warning value or not, judges whether a high-frequency current pulse from the high-frequency current sensor is greater than a high-frequency current pulse warning value or not when the temperature exceeds the temperature warning value, and establishes a three-dimensional temperature field according to the temperature of the measuring point when the high-frequency current pulse is greater than the high-frequency current pulse warning value; the method comprises the following steps: acquiring a three-dimensional temperature field, performing spatio-temporal data alignment on the three-dimensional temperature field and high-frequency current acquired by a high-frequency current sensor, generating an abnormal region thermodynamic diagram, judging whether time and temperature data after alignment have interference or not, and performing three-dimensional positioning on a defective region and evaluating the severity of the defective region by an analysis layer when the interference does not exist.

The invention relates to the technical field of lamp bead active heat dissipation, and discloses an LED lamp bead active heat dissipation system and method, and the method comprises the steps: injecting a micro-current pulse into a PN junction of an LED chip through a constant current source, collecting a forward voltage drop sampling value, and collecting a substrate temperature sampling value; calculating a junction temperature value based on the forward voltage drop sampling value, and calculating a junction-to-case temperature difference value and a substrate temperature rise rate value; setting an early-warning state identifier when the junction-to-case temperature difference value exceeds an early-warning threshold value and the duration meets a preset duration, setting an alarm state identifier when the junction-to-case temperature difference value exceeds an alarm threshold value, and shielding thermal runaway detection when the substrate temperature rise rate value exceeds an environment thermal shock threshold value and the junction-to-case temperature difference value is smaller than an environment exclusion threshold value; when the state identification is the normal state identification, calculating a first compensation current value; and when the state identification is the early warning state identification, a second compensation current value is calculated, and when the state identification is the alarm state identification, an alarm current limiting value is calculated, so that the working stability and long-term reliability of the LED in a wide temperature range are ensured.

Device and method for measuring a junction temperature of a power semiconductor (3) using the resistance Rgint (32) of said semiconductor (3) comprising at least: a current injector circuit (5) injecting current pulses Iinj in the gate path of said power semiconductor (3) through the emitter of said power semiconductor, said current injector circuit (5) being driven by a digital injection control circuit (4, 6) to synchronize said current pulses within a stabilized part of ON states of the power semiconductor driver (1) PWM signal driving said power semiconductor (3), a peak detector circuit (7) to record emitter voltage peaks Ve at the terminals of the current injector circuit and generate a continuous signal Vpks dependent of the junction temperature Tj through integration of said voltage peaks, a signal conditioning circuit (8) to adapt the continuous signal Vpks dependent of the junction temperature into a range of 3V to 5V of a measurement system (9).

The invention discloses a lithium ion pool charge state detection method and system based on an electrochemical impedance spectroscopy, by obtaining impedance spectroscopy measurement data in a full charge state range, the data integrity of model construction is ensured, a foundation is laid for later model construction, a fractional order equivalent circuit model is adopted to fit impedance spectroscopy data, and the lithium ion pool charge state detection method and system based on the electrochemical impedance spectroscopy are obtained. According to the method, the actual electrochemical behavior of the battery can be described more accurately, the defects of a traditional integer order model during fitting of a non-ideal semicircular structure are overcome, the parameter identification precision is improved, SEI film resistance RSEI and a battery impedance value are screened out to serve as characteristic parameters to construct a battery SOC estimation model, the state estimation reliability is improved, and the reliability of the state estimation is improved. According to the method, the SOC of the to-be-detected battery is estimated based on the battery SOC estimation model, lossless, rapid and online detection of the battery is realized, and the method disclosed by the invention does not need complex iterative calculation or large-current pulse test and is high in parameter identification precision.

The invention discloses a servo turntable low-temperature friction adaptive compensation method, which belongs to the field of antenna servo control, and comprises the following steps: acquiring environment temperature, air pressure, wind speed and current parameters, and generating feature vectors; generating a working condition diagnosis label through pattern recognition; dynamically constructing an instantaneous friction response model from the physical effect library; executing an asymmetric high-frequency current pulse sequence in an extremely low temperature starting stage to break through static friction; based on model output and encoder micro-motion spectrum characteristics, a compensation mode is decided and activated through multi-mode collaborative logic; and calculating a composite compensation amount and superposing the composite compensation amount to a position loop for output. A multi-source environment perception and physical effect library dynamic combination mechanism is adopted, precise compensation can be achieved for severe working conditions such as plateau low pressure and strong wind disturbance, and the pointing precision and operation stability of the servo rotary table in the extremely cold complex environment are improved.

The application discloses a kind of carbon dioxide laser pulse signal quality detection and anti-interference control method and system, it is related to the field of device using stimulated emission, this method includes: when enabling effective state indication is effective, external pulse width modulation signal is sampled, and the sequence of multiple-point sampling buffer is obtained, the rising edge and the falling edge of external pulse width modulation signal are determined, and the pulse period measurement value and the pulse width measurement value of current pulse are calculated;Determine the preset duty cycle interval to which the duty cycle of current pulse belongs, and generate a duty cycle interval flag;Measure power measurement value, and compare with the proportional threshold value generated based on current pulse width measurement value, to determine power abnormal state;When power abnormal state is abnormal, determine shielding period in preset mapping table according to duty cycle interval flag, generate protection control signal, and perform anti-interference control to laser. By implementing the present application, abnormal detection and anti-interference control of laser output in a larger duty cycle range can be realized.

The invention provides an intelligent lamp and a no-disturbance working method thereof, and the method comprises the steps: obtaining a detection signal outputted by an AC power switch disconnection detection circuit, and judging whether a switch of the intelligent lamp is disconnected or not according to the detection signal; if it is determined that the switch is disconnected once, after the alternating current power supply switch disconnection detection circuit detects the alternating current pulse signal again, the switch disconnection count value is increased once; and judging whether the intelligent lamp is provided with the no-disturbance mode and the current time period is within the no-disturbance time period, if so, further judging whether the switch-off count value is greater than or equal to two times, if so, the intelligent lamp emits light according to the state of the last power failure, and if the switch-off count value is less than two times, the intelligent lamp does not emit light. The invention further provides the intelligent lamp for implementing the method. The intelligent lamp can be prevented from being powered on again after power failure at night to affect a user.

One example includes a superconducting data input system. The system includes an inductive coupler that generates first and second bias currents in response to receiving a current pulse. The system also includes a first clocked receiver configured to generate a first superconducting data signal having a first data state in response to the first bias current at a first phase of a clock signal, and a second data state in response to not receiving the first bias current at the first phase of the clock signal. The system further includes a second clocked receiver configured to generate a second superconducting data signal having the first data state in response to the second bias current at a second phase of the clock signal different from the first phase, and having the second data state in response to not receiving the second bias current at the second phase of the clock signal.

The application discloses a single-machine electric tool anti-twisting control method, device and controller, belongs to the electric tool control technical field, and aims to solve the problem of the safety damage risk of the reaction force to the operator when the electric tool stops. The method steps are as follows: when the motor operates in a first mode, the load parameter of the motor is acquired; when the load parameter meets a first condition, the electronic commutation direction of the motor is kept unchanged and timing is started, and the first duty cycle of the current pulse width modulation signal is recorded; the duty cycle is reduced to a second duty cycle within a first time; after the third duty cycle is continuously reduced, the motor is controlled to operate in a second mode at the third duty cycle for a preset time period, and finally stops. The application does not need additional components such as gyroscopes, has low cost and compact structure, realizes smooth force unloading, avoids rigid recoil at the moment of stopping, guarantees the safety of the operator, and improves the man-machine experience.

The invention discloses a measurement regulation and control method and system of an atomization tester, and aims to solve the problem that a Peltier temperature control system is easy to generate overshoot and low-frequency oscillation at a critical point. The method comprises the following steps: S1, setting a target temperature and a precision tolerance interval; s2, rapidly cooling to a dynamic switching temperature; s3, switching to a precise approaching mode, and driving a Peltier by adopting a frequency self-adaptive micro-current pulse sequence based on the residual heat to realize overshoot-free temperature positioning; and S4, when the temperature meets the steady-state conditions of the mean value, the standard deviation and the trend slope, switching to a steady-state holding mode, performing spectral analysis on the temperature sequence to distinguish high-frequency disturbance and low-frequency drift, and only applying intelligent micro-compensation subjected to nonlinear filtering to the low-frequency drift. According to the invention, through multi-stage strategy matching, pulse control based on energy prediction and intelligent disturbance identification, rapid, accurate and stable control of the temperature of the condensation plate is realized, and the reproducibility of a test result is significantly improved.

The invention discloses a BOPP (Biaxially-oriented Polypropylene) rolling driving safety linkage control method, which relates to the technical field of industrial automation control and comprises the following steps: establishing an electromagnetic disturbance distribution diagram of a driving and rolling signal transmission path, extracting electromagnetic coupling strength distribution on the basis of a current pulse space diffusion track generated by a driving device and a rolling device in a start-stop stage, and calculating a driving speed of the driving and rolling signal transmission path; and dividing a strong coupling region and a weak coupling region according to the coupling strength to form a continuous electromagnetic characteristic band. The delay absorption layer and the reverse phase shift guide chain are arranged in a signal path, so that layered energy absorption and reverse phase counteracting are realized, electromagnetic pulse propagation is weakened, and false triggering is prevented; and meanwhile, a low-amplitude periodic slip signal is injected into the signal input end, so that the channel frequency generates micro-amplitude wandering, a dynamic self-adaptive anti-interference mechanism is formed, and stable and reliable signal transmission is ensured.

The application relates to a multi-motor synchronous stopping method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring current pulse rotating speeds of each motor and target pulse amounts required for each motor to return to the original point; taking one motor as a reference motor, obtaining target rotating speeds of the reference motor in a speed regulation stage and time in each stage according to the current pulse rotating speed and the target pulse amount of the reference motor and preset reference accelerations in each stage; obtaining target rotating speeds of the remaining motors in the speed regulation stage according to the time of the reference motor in each stage and the current pulse rotating speeds and the target pulse amounts of the remaining motors; and controlling the motors to sequentially pass through the speed regulation stage, the deceleration stage and stop at the original point according to the target rotating speeds of the motors and the time in each stage. The method can improve the accuracy and stability of multi-motor synchronous stopping, can be applied to a polishing machine, ensures that the motors in different states simultaneously stop at the original position, and greatly improves the safety of production products.

The invention discloses an underground detonation monitoring device for bridge-firing combined operation, and relates to the field of ocean engineering equipment, the underground detonation monitoring device comprises a pressure-resistant sealing shell assembly, and a dual-channel communication module is installed in an inner cavity of the pressure-resistant sealing shell assembly; a piezoelectric ceramic vibration sensor, a polymer-based annular resonant cavity sensor, an electromagnetic sensor array and a photoelectric sensor array are installed in an inner cavity of the compression-resistant sealing shell assembly. According to the underground detonation monitoring equipment for bridge shooting combination, through the arrangement of the piezoelectric ceramic vibration sensor, the polymer-based annular resonant cavity sensor, the electromagnetic sensor array and the photoelectric sensor array, high-frequency vibration waves can be captured, temperature and stress can be sensed, detonator current pulses can be analyzed, and shell deformation can be monitored; therefore, synchronous capturing of full-dimension physical signals in the perforation process can be achieved, the dual-channel communication module can automatically switch paths under perforation electromagnetic pulse interference, and monitoring data can be continuously transmitted back to a ground control center.

The embodiment of the invention discloses a defect detection device for an insulating part, and the device comprises a short-wave light generator which is used for transmitting a short-wave light beam to irradiate the detected insulating part; the voltage controller is electrically connected with the short-wave light generator and is used for adjusting the working voltage of the short-wave light beam; the current controller is electrically connected with the short-wave light generator and is used for adjusting the working current of the short-wave light beam; the high-frequency current coil is sleeved on a grounding wire of the detected insulating part in a penetrating manner and is used for acquiring a partial discharge current pulse signal of the detected insulating part in real time; the feedback controller is respectively in communication connection with the high-frequency current coil, the voltage controller and the current controller, and is used for sequentially sending a voltage boosting instruction and a current boosting instruction to the voltage controller and the current controller, and determining a working voltage meeting a first preset condition and a working current meeting a second preset condition; and performing defect detection on the detected insulating part by using the working voltage and the working current.

The invention relates to the technical field of intelligent electric meters, and discloses an electric energy metering device and a method for generating electric energy metering pulses based on timestamps thereof, the device comprises a metering unit and a control unit, and the control unit comprises a timer and a pulse width counter; the metering unit sends the target sending timestamp of the current pulse to the control unit; the timer continues timing, and when a timing value reaches a target sending timestamp, the control unit pulls up the level of the pulse output pin from a low level to a high level and starts to output a current pulse; the pulse width counter starts to count from 0 when the level of the pulse output pin is pulled up, when the count value reaches a preset pulse width value StopCounter / N, the control unit pulls down the level of the pulse output pin from high level to low level and ends the output of the current pulse, 1 / N is the duty ratio requirement, and StopCounter is a stop count value corresponding to the current moment. According to the method, the stop count value and the preset pulse width value can be dynamically updated, the conflict situation that the previous pulse is not ended but the next pulse starts in advance is avoided, and the pulse precision is ensured.

The application discloses a high-precision oscilloscope probe delay correction platform, and relates to the field of power electronic device testing. In the oscilloscope probe delay correction platform, a high-speed pulse generation module is used to output a control signal, and a driving module is used to amplify the control signal to generate a corresponding driving signal to drive a transistor, so that a voltage pulse signal is generated on a power resistor in series with the main current path of the transistor and is output through a parallel voltage probe interface, and a current pulse signal is generated and is output through a series current probe interface. The platform can realize delay correction of a high-voltage and high-current probe range, is favorable for reducing the minimum distinguishable time lag, improving the delay correction precision, reducing the oscillation in the rising and falling processes, and can also be used for delay correction of a high-voltage and high-current probe range in addition to a low-voltage and low-current probe, so that more extensive range adaptation is realized.

The invention relates to the technical field of motion detection, and discloses a primary motion detector based on a PN junction channel, a preparation method and a sensor, the primary motion detector comprises a first photoelectric transistor and a second photoelectric transistor; the first phototransistor is configured to work under source-drain positive bias voltage, and the attenuation process of light current during turn-off has a first fast attenuation time constant and a first slow attenuation time constant; the second phototransistor is configured to work under the source-drain reverse bias voltage, the photocurrent of the second phototransistor when the second phototransistor is turned off has a second fast decay time constant and a second slow decay time constant, and the first fast decay time constant is larger than the second fast decay time constant; a directional current pulse can be detected at the output of the primary motion detector when the light pulse moves in the direction from the first phototransistor to the second phototransistor. According to the invention, high-efficiency and low-power-consumption discrimination of the optical signal direction is realized.

The invention discloses a pulse wave matching method, device and equipment for non-invasive blood pressure measurement. The method comprises the steps that pulse wave data on each pressure step are collected to obtain a typical pulse wave waveform in a rising-first and falling-second form; performing characteristic value extraction on the pulse waveform by adopting double sliding windows, and judging whether the characteristic values of the current pulse wave and the previous pulse wave are matched or not; the characteristic values comprise a pulse wave amplitude value, a processing signal peak value, a processing signal valley value and a processing signal peak-valley interval; if not, continuing to collect the pulse wave data and continuing to perform characteristic value matching, and if yes, collecting the pulse wave data on the next pressure step. According to the method, the pulse wave features are enhanced through double-window processing, and the influence of interference factors is effectively reduced while the matching judgment precision is improved in combination with the original waveform features.

The embodiment of the invention provides a wide dynamic range ion pulse threshold adaptive counting method and circuit, and the method comprises the steps: a first end of an electron multiplier is connected with an ion signal, a second end is connected with an input end of an amplification circuit, an output end is connected with a first end of a baseline extraction module, and a second end is connected with a first end of a baseline smoothing module; the second end is connected with the input end of the comparison circuit and the output end is connected with the counting circuit; the electron multiplier is used for converting the ion signal into a current pulse; the amplifying circuit is used for converting the current pulse into a voltage pulse; the baseline extraction module is used for extracting a voltage pulse baseline to obtain a baseline signal; the baseline smoothing module is used for smoothing the baseline signal to obtain a smoothed signal; the comparison circuit is used for dynamically determining a self-adaptive threshold value based on the smooth signal, comparing the voltage pulse with the self-adaptive threshold value and outputting a comparison signal; and the counting circuit is used for pulse counting to obtain the number of target pulses. Therefore, the counting accuracy and the counting upper limit are improved.

Embodiments of the present invention related to a neuromimetic circuit including a transmitter circuit to receive the threshold signal from a superconducting optoelectronic neuron and convert the small current pulse to a voltage pulse sufficient to produce light from a semiconductor diode. This light is the signal used to communicate between neurons in the network. The transmitter circuit in accordance with the present invention includes an amplifier chain that comprises two Josephson junctions, a superconducting thin-film current-gated current amplifier, and a superconducting thin-film current-gated voltage amplifier. The transmitter circuit in accordance with the present invention enable an amplification sequence that allows neuronal firing of about 20 MHz with power density sufficiently low to be cooled with standard 4He cryogenic systems operating at 4.2 K.

The invention discloses a self-calibration type capacitor frequency conversion method, which comprises the following steps of: connecting a capacitor to be measured into a charging loop through a switch matrix, charging the capacitor to be measured, transferring charges of the capacitor to be measured to an integrating capacitor, and generating an integrating voltage; inputting the integral voltage into a five-stage ring oscillator so as to convert the integral voltage into a square wave signal, and performing pulse width amplification on the square wave signal through a time amplifier; a calibration engine is introduced, the calibration engine starts calibration by detecting calibration parameters, the current pulse width is obtained by sequentially switching the reference capacitor array to the measurement channel, and the current pulse width is compared with the stored factory calibration value of the reference capacitor; if the comparison deviation exceeds a threshold value, calculating a scale factor, superposing a second-order temperature compensation model on the scale factor, and finally outputting a calibrated capacitance value to be measured; according to the invention, the time-to-digital converter replaces the traditional ADC, and the intelligent switching reference capacitor array and the dynamic temperature compensation algorithm are combined, so that the full-working-condition self-calibration is realized.

The invention provides a switched capacitor resonant type large-current pulse power supply and a control method thereof.The switched capacitor resonant type large-current pulse power supply comprises a direct-current input source, an inverter circuit, a resonant cavity and a transformer, and the direct-current input source is connected with the direct-current end of the inverter circuit; the resonant cavity is connected in series with a primary winding of the transformer and then connected to an alternating current end of the inverter circuit, a secondary winding of the transformer is used for connecting a load, and the transformer is a step-down transformer; the inverter circuit outputs positive-voltage square waves, the resonant cavity generates resonance to form sine-like resonance current, the resonance current forms large-current pulses in a load loop of a secondary side through the transformer, and when the resonance current reaches zero, the resonance current is maintained to be zero. According to the invention, soft switching of all switching tube devices can be realized, the current stress of a semiconductor device is reduced and the reliability and efficiency are improved by adopting the transformer, and meanwhile, a full-control device is adopted, so that high-frequency pulse output can be realized.

The application discloses an anti-interference frame synchronization method in high-speed frequency hopping communication, equipment and medium, the anti-interference frame synchronization method in high-speed frequency hopping communication includes: combining interference detection based on communication receiving end and single synchronization pulse correlation value multi-feature joint decision, constantly interference detection is carried out to receiving end synchronization pulse signal, and the position of interference point is marked, according to the number of non-interference marked points in synchronization pulse and the synchronization correlation value calculated from non-interference marked points and the threshold value set, multi-feature joint decision is carried out, to carry out error correction processing to the correlation value of current pulse, and the accumulation of multiple synchronization pulse correlation values, by setting reasonable threshold, the correct frame synchronization position is finally detected. The application can be in the case where interference exists, through interference detection and single pulse correlation value multi-feature joint decision technology, can realize the great improvement of anti-interference frame synchronization performance under the premise of not increasing additional resources.

The application discloses an electric read-write memory device based on 180-degree flip of anti-ferromagnetic Neel vector, a preparation method and a read-write method. The electric read-write memory device comprises a substrate layer, an anti-ferromagnetic layer and a spin source layer which are sequentially stacked from bottom to top and constitute a heterostructure. The material of the substrate layer is a single crystal wafer capable of epitaxially growing the anti-ferromagnetic layer. The material of the anti-ferromagnetic layer is a collinear anti-ferromagnetic material with abnormal Hall effect or a staggered magnet with abnormal Hall effect. The material of the spin source layer has a spin current generation capability. The memory utilizes a current pulse to drive 180-degree flip of the Neel vector. The Neel vector before and after the 180-degree flip has two abnormal Hall resistance states of high and low, and can be used for storing information "0" and "1". The application not only enriches the connotation of the interaction between the spin current and the anti-ferromagnetic Neel vector, but also lays a foundation for constructing a high-density, high read-write speed and low-power nonvolatile magnetic random memory.

The embodiment of the invention provides a power battery charging method, a vehicle, a storage medium and a program product, and the method comprises the steps: applying a charging current pulse to a power battery in a charging stage of the power battery; applying an excitation signal comprising a plurality of frequency components to the power battery in an intermittent stage of the charging current pulse; determining a state evaluation parameter of the power battery based on the response of the power battery to the excitation signal; adjusting a charging parameter of a target charging stage based on the state evaluation parameter; the target charging stage is a charging stage executed after the intermittent stage; and in the target charging stage, charging current is applied to the power battery according to the adjusted charging parameters. Multi-frequency excitation is applied in the charging intermittent period, and subsequent charging is adjusted in real time based on response, so that the problem of mutual conflict between the charging process and state monitoring is solved, and unified management of safety and efficiency is realized.