24 results about "Pulse cycle" patented technology

The present invention relates to a water pump dry-run detection method and system, where the method includes: converting an operating current signal of a water pump into a voltage signal; collecting, at a frequency, a voltage signal value output by the voltage-current conversion module within one pulse cycle of the water pump in a dry-run state to obtain a first determined threshold corresponding to the dry-run state; calculating determined data at a current time point based on a voltage signal value of the water pump during use within the pulse cycle; and determining, based on a magnitude relationship between the determined data and a first determined threshold, whether the water pump is in the dry-run state.

The present application belongs to the technical field of piezoelectric drive, and particularly relates to a noise reduction piezoelectric drive method, a system and a lens drive device. The noise reduction piezoelectric drive method drives a piezoelectric element by using a square wave signal. In a control period for driving the piezoelectric element, the pulse frequency of at least one adjustment period is adjusted to be different from the pulse frequency of other adjustment periods. The pulse amplitude of at least one pulse period is adjusted to be different from the pulse amplitude of other pulse periods. The present application uses a variable square wave drive mode. By adjusting and controlling the driving square wave for driving the piezoelectric element at start and stop, the combination of different driving square waves is used to reduce the speed and acceleration rate at which the piezoelectric element starts and ends movement, so that the noise problem can be effectively improved.

The application discloses a motor control double-arm Rubik's cube robot method based on a robot vision recognition algorithm and belongs to the technical field of motor control double-arm Rubik's cube robot methods. In matlab, the starting and ending speed, the maximum speed, the total time, the uniform speed time, the subdivision number of a stepping motor, the subdivision interval, the rotation angle parameter, the specified control curve T type and the S type are defined according to the subdivision number and the rotation angle. The total pulse number is calculated, the total pulse is distributed to the acceleration, uniform speed and deceleration stages, the specified control curve T type and the S type are defined according to the subdivision number and the rotation angle, the total pulse number is calculated, the total pulse is distributed to the uniform speed, acceleration and deceleration stages, the acceleration stage is divided into two sections, namely, the S type, the jerk acceleration is calculated, the speed change is calculated through integration, and the acceleration stage pulse cycle is generated. When the acceleration stage is the uniform acceleration stage, namely, the T type, the acceleration is calculated, the speed linearly grows in each pulse cycle, and the acceleration stage pulse cycle is generated.

The application belongs to the technical field of random number generation, and particularly relates to a random signal generation device based on a saturable absorber semiconductor laser. The device comprises a random self-pulsation entropy source, a photodetector and a pulse amplitude quantization module. The random self-pulsation entropy source adopts a saturable absorber semiconductor laser (preferably a DFB-SA structure), generates optical pulses with random amplitudes and stable repetition periods by injecting a driving current in a gain region and applying a reverse bias voltage in an absorption region; the photodetector adopts a PIN photodiode or an avalanche photodiode to convert the optical pulses into corresponding electrical pulses; and the pulse amplitude quantization module comprises a differential comparator and a peak detection circuit, which quantizes the peak value of the electrical pulses in each pulse period by using a fixed threshold or an adaptive threshold to generate a random bit sequence. The application realizes high-speed and high-stability random signal generation without an external electric clock, an ADC and digital post-processing, and has a simple device structure, low power consumption and high integration.

The application relates to the technical field of discharge signal collection, in particular to a high-voltage cable partial discharge signal synchronous collection method and system, which comprises the following steps: based on a multi-channel high-speed double-ADC architecture, synchronously collecting ground loop current signals and high-frequency current signals in the operation process of a high-voltage cable; calculating pulse frequency spectrum consistency and mutation phase fluctuation to obtain a discharge loop current abnormality; determining the pulse periodicity of the high-frequency current signals; extracting harmonic frequency parameters and energy attenuation parameters of the high-frequency current signals, calculating a harmonic abnormality, combining the pulse periodicity to obtain a pulse harmonic abnormality factor; performing weighted summation on the discharge loop current abnormality and the pulse harmonic abnormality factor to evaluate the reliability of the synchronously collected signals, and outputting a synchronous collection result of the high-voltage cable partial discharge. Therefore, the accuracy of the synchronous collection of the partial discharge signals is improved.

The application discloses a high-frequency pulse DC power output stability control device and belongs to the technical field of power supply control. The device proposes a state zeroing-knowledge injection control paradigm for the contradiction between overshoot and slow response after reset of the traditional controller in the pulse mode due to integral memory. At the starting moment of each pulse period, a pulse opening instruction is generated and a reset signal is generated with a delay, the integral capacitor is forced to discharge to make its output zero, and the overshoot risk is eliminated; according to the load current steady-state value collected during the last pulse off period and the current target duty cycle, a feedforward control value is determined; in the same control period when the integral value is zeroed, the feedforward value and the integral output value are added to generate a drive control signal, and finally the drive power switch output pulse current is modulated. Through the cooperation of physical state forced zeroing and system knowledge cross-period prediction injection, the application realizes the rapid and non-overshoot establishment of the pulse current, and effectively solves the dynamic performance bottleneck of the high-frequency pulse power supply.

A method, apparatus and system for processing a wafer in a plasma chamber system, which includes at least a plasma generating element and a biasing electrode, include generating a plasma in the plasma chamber system by applying a source RF source power to the plasma generating element for a first period of time of a pulse period of the RF source power, after the expiration of the first period of time, removing the source RF source power, after a delay after the removal of the RF source power, applying an RF bias signal to the biasing electrode for a second period of time to bias the generated plasma towards the wafer, and after the expiration of the second period of time, removing the RF bias signal from the biasing electrode before a next pulse period of the RF source power. The generated plasma biased toward the wafer is used to process the wafer.

The application discloses an automatic guided vehicle cooperative positioning system, method, equipment and storage medium. The system comprises at least one light pulse transmitter and at least one vehicle body receiver. The light pulse transmitter is used to generate and emit a scanning light signal and a light pulse signal according to a synchronous light signal. The vehicle body receiving module is used to acquire a mixed signal, separate the mixed signal to generate each separated signal, and determine the vehicle body position and posture of the automatic guided vehicle based on the separated signal, wherein the mixed signal comprises the synchronous light signal, the scanning light signal and the light pulse signal. The global light synchronization mechanism is introduced, the light pulse transmitter is designed to realize the fixed cycle synchronous light signal covering the whole space, and the pulse cycle is introduced for signal separation. Through the determination of the vehicle body position and posture, the multi-guided vehicle cooperative positioning is finally realized, the positioning accuracy and reliability are improved, the more efficient and accurate cooperative transportation is realized, and the logistics efficiency and production automation level are improved.

The present invention provides a light-emitting control signal modulation method, a module, and a display device. The light-emitting control signal modulation method is used for modulating a light-emitting control signal, wherein the light-emitting control signal is a pulse width modulation (PWM) signal, a frame time comprises M pulse cycles, M is an integer greater than 1, and the pulse cycles comprise invalid time periods and valid time periods which are set in sequence. The light-emitting control signal modulation method comprises: controlling a duration of valid time periods comprised in the first N pulse cycles comprised in a frame time to be greater than a duration of valid time periods comprised in pulse cycles other than the N pulse cycles comprised in the frame time, wherein N is a positive integer; N is less than M; in the invalid time periods, the potential of a light-emitting control signal is an invalid voltage; and in the valid time periods, the voltage of the light-emitting control signal is a valid voltage. The present invention can reduce brightness differences between different pulse cycles, thereby alleviating flicker.

The present application belongs to the technical field of piezoelectric drive, and particularly relates to a noise reduction piezoelectric drive method, a system and a lens drive device. The noise reduction piezoelectric drive method drives a piezoelectric element by using a square wave signal; during the control period of driving the piezoelectric element, the duty cycle of at least one pulse period is adjusted to be different from the duty cycle of other pulse periods. And the pulse frequency of at least one adjustment period is adjusted to be different from the pulse frequency of other adjustment periods. The present application adopts a variable square wave drive mode, and by adjusting and controlling the driving square wave for driving the piezoelectric element, the speed and the acceleration change rate of starting and ending movement of the piezoelectric element are reduced by using the combination of different driving square waves, so that the noise problem can be effectively improved.

This invention discloses a pulsed adaptive cooling demand adjustment method based on AI load forecasting, comprising: generating a load feature dataset in a unified format; obtaining a downsampled load feature dataset; sequentially extracting short-cycle fluctuation features, periodic trend features, and long-term evolution features; obtaining a calibration load uncertainty interval sequence; solving for the target cooling capacity and its optimal pulse duty cycle; converting the target cooling capacity into a pulsed start-stop signal to drive the compressor to start and stop within the pulse cycle according to the optimal pulse duty cycle; and immediately switching to a protection pulse mode to maintain safe system operation when the rate of change of the chilled water outlet temperature exceeds a safety threshold or a sensor self-check failure is detected. This invention retains detailed information about load abrupt changes, significantly improving the prediction accuracy and robustness of the model under non-stationary, multi-scale load environments.

This sensor module comprises: a sensor that outputs a first signal; a filter that is connected at a subsequent stage of the sensor, and that attenuates a frequency component of the first signal of a cutoff frequency or greater, said cutoff frequency being higher than a fundamental frequency of the first signal; and a condition evaluation circuit that is connected at a subsequent stage of the filter and into which a second signal, which is the first signal after the frequency component has been attenuated by the filter, is input. The condition evaluation circuit evaluates whether the second signal satisfies a prescribed condition, and outputs a digital signal based on the evaluation result. The digital signal includes a pulse which cyclically repeats a high and a low in a period in which the second signal satisfies the prescribed condition, and the digital signal is fixed at the low in a period in which the second signal does not satisfy the prescribed condition. The repetition frequency of the pulse is the cutoff frequency or greater.

A keyboard system comprises a key structure including a key switch with a lighting element and phototransistor, and one or more processors that drive the lighting element for a first pulse duration. The output of the phototransistor is determined at the end of the first pulse duration, wherein the key structure is determined to be pressed when the output is below a first output value at an end of the first pulse duration, and unpressed when the output of the phototransistor is above a second output value at the end of the first pulse duration. A fall-time of the output during the first pulse duration is determined and the first pulse duration is calibrated to a second pulse duration when the fall time less than the first pulse duration, the second pulse duration being greater than the fall time and less than the first pulse duration.

The application provides a wheel speed sensor jitter suppression method, system and device, and belongs to the technical field of sensor control. The wheel speed sensor jitter suppression method comprises the following steps: a hardware input capture module of a microcontroller is used to configure a double-edge trigger mode, to capture the rising edge and falling edge of a wheel speed square wave signal in real time and trigger a capture interrupt; in a service subprogram of the capture interrupt, the time stamp of each rising edge and falling edge is recorded, and the high level duration and low level duration in a single pulse period are calculated accordingly; according to the high level duration and the low level duration, the actual duty cycle of the current pulse period is calculated, the actual duty cycle is compared with a preset nominal duty cycle tolerance range, and a duty cycle verification result is generated.

The embodiment of the application discloses a kind of laser strike device and unmanned plane, laser strike device is set to the body of unmanned plane, laser strike device includes: rotating assembly, laser emission component, imaging component, range finder and controller, controller can realize: control laser emission component in detection mode with pulse mode emit face array laser, and control imaging component in multiple pulse periods acquisition first image when face array laser is emitted and second image when face array laser is closed;Each first image is differentially processed, and multiple frames of laser reflection images reflecting cat-eye effect are generated;Bright spot target is extracted from each frame of laser reflection image;Bright spot target and corresponding time sequence one frame second image are fused, and target object and target object target strike position are identified and confirmed;According to the distance information between target object obtained by range finder, control laser emission component switches to interference mode, and emits laser beam to target strike position.

The application discloses a control method of a multi-output induction heating power supply, and belongs to the technical field of induction heating power supplies, and comprises the following steps: S1, receiving the time-sharing sequence control instruction, and turning on an arbitrary output loop; S2, receiving the closed-loop adjustment amount of the output loop, and adjusting the on time and the pulse cycle number according to the feedback value within the start-stop time of the output loop; when the feedback value reaches a set value, the output loop stops running, after a dead time, an arbitrary output loop different from the current running loop is turned on, and the same loop cannot be turned on repeatedly in the same total adjustment cycle; and S3, circulating S2 until an end instruction is received. Through the time-sharing sequence control on the output loop, the problems of the simultaneous output of power of each coil, the electromagnetic coupling between the coils and the increased coil loss in specific occasions, such as crystal growth, epitaxy and single crystal directional solidification, which need stable and uniform temperature fields or temperature gradient temperature fields, are solved, and the control method has a good energy-saving effect.

An apparatus for relieving symptoms of endometriosis comprises an electrical stimulator comprising a plurality of electrodes configured to be placed in spaced-apart contact with skin of a subject. The apparatus comprises electronic circuitry providing, for the duration of a treatment session lasting at least two minutes, an electrical signal for application to the subject through the plurality of electrodes, the electrical signal comprising a plurality of successive sequences of pulses, each sequence comprising respective progressions of pulsing cycles monotonically increasing in frequency from a minimum frequency of at least 30 pulsing cycles per second to a maximum frequency of at most 200 pulsing cycles per second.

The application relates to the technical field of array radar signal processing, in particular to a queue driving array radar signal processing implementation method based on FPGA, which comprises the following steps: dividing a queue data buffer area into three parts of a data buffer area, a parameter buffer area and a data state area; when reading operation is performed, reading parameters through the state of the data state area, and then reading data according to the parameters; storing DDC data in a queue cycle according to a transmission pulse period, reading according to corresponding parameters according to the storage sequence, and performing DBF operation; storing DBF operation data in a queue cycle according to the transmission pulse period, reading according to corresponding parameters according to the storage sequence, and performing PC operation; storing PC operation data in a queue cycle according to an accumulation period, reading data according to corresponding parameters according to the storage sequence, and performing MTD operation. The method isolates the processing time sequence coupling between modules, is beneficial to mode parameter switching and program transplantation.

Disclosed is a plasma treatment device comprising: a chamber; a substrate support part in the chamber; a source power supply configured to periodically supply a pulse of a source signal in a pulse cycle, and set a power level of the pulse of the source signal to a first level in a first period within the pulse cycle; and a bias power supply configured to supply a pulse of a bias signal to the substrate support part in a second period that starts from a delay time point at which a delay time of 1-30 microseconds elapses from a start time point of the first period.

The present application belongs to the technical field of piezoelectric drive, and particularly relates to a noise reduction piezoelectric drive method, a system and a lens drive device. The noise reduction piezoelectric drive method drives a piezoelectric element by using a square wave signal; in a control period of driving the piezoelectric element, the duty cycle of at least one pulse period is adjusted to be different from the duty cycle of other pulse periods. The pulse frequency of at least one adjustment period is adjusted to be different from the pulse frequency of other adjustment periods. The pulse amplitude of at least one pulse period is adjusted to be different from the pulse amplitude of other pulse periods. The present application uses a variable square wave drive mode, adjusts and controls a driving square wave for driving the piezoelectric element at start and stop, uses a combination of different driving square waves, reduces the speed and acceleration rate of starting and ending movement of the piezoelectric element, and can effectively improve the noise problem.

This invention discloses a partial discharge interference suppression method based on pulse period consistency evaluation. First, the partial discharge signal is analyzed using a cumulative energy function to calculate the average energy. Em Then, a cumulative energy curve is constructed, and after smoothing and filtering, local minima are identified as pulse start points and local maxima as pulse end points, allowing for accurate extraction of pulse timestamps. Next, periodic consistency is evaluated based on the pulse time series: the interference period is estimated using a third-order autocorrelation function. T Then, time deviation score and energy consistency score are calculated separately to quantify the periodicity characteristics of the pulse through dual scoring. Finally, pulses with scores all above the threshold are identified as periodic interference, and the partial discharge quantity of their corresponding time period is set to zero. This invention does not require changes to the hardware connection, can adaptively distinguish and eliminate periodic interference generated by power electronic devices, improve the accuracy and reliability of partial discharge monitoring, and overcome the shortcomings of traditional manual window selection methods.

Disclosed are methods, systems, apparatus, devices, and other implementations, including a method of operating a mass spectrometry system that includes applying a first AC voltage pulse cycle, from a plurality of AC voltage pulses each having a varying amplitude defined by a waveform, to at least one electrode of a mass spectrometer, with the waveform including a ramp-down portion. The method further includes obtaining an amplitude value of a resultant voltage signal produced from the first voltage pulse during a stabilized portion of the waveform prior to a beginning of the ramp-down portion, comparing the amplitude value with a predefined amplitude setpoint, and adjusting the waveform for a second AC voltage pulse following the first AC voltage pulse based on a difference between said amplitude value and said predefined amplitude setpoint.

This application provides a control method, device, robot, equipment, and medium for a stepper motor. The method includes: acquiring a first drive pulse signal of the stepper motor in the current pulse cycle; then, switching the first drive pulse signal from a first pulse state to a second pulse state in at least one pulse sub-cycle to generate a second drive pulse signal corresponding to the current pulse cycle; and sending the second drive pulse signal to the stepper motor. The current pulse cycle includes multiple pulse sub-cycles, during which the first drive pulse signal maintains a first pulse state, which is used to drive the stepper motor to rotate; the second pulse state is used to drive the stepper motor to stop rotating, and the energy consumption of the stepper motor in the second pulse state is less than the energy consumption in the first pulse state.

A device for alleviating symptoms of endometriosis includes an electrical stimulator comprising a plurality of electrodes configured to be positioned to make contact with the subject's skin at a distance. The device includes an electronic circuit for providing an electrical signal to be applied to the subject through the plurality of electrodes during the duration of a treatment session lasting at least 2 minutes, wherein the electrical signal comprises a plurality of consecutive sequences of pulses, each sequence comprising a progression of pulsing cycles in which the frequency increases monotonically from a minimum frequency of at least 30 pulsing cycles per second to a maximum frequency of up to 200 pulsing cycles per second.