126 results about "Pulse cycle" patented technology

The invention relates to the technical field of automatic detection, in particular to a multi-station PCBA (printed circuit board assembly) detection method based on machine vision, which comprises the following steps: acquiring a multi-station reference pulse period, dividing a time window, comparing starting time difference, controlling image acquisition to synchronize, locally imaging a PCBA based on a synchronizing signal, extracting temperature response of a welding spot, and constructing a heat conduction path. Mapping to a visible light image, evaluating welding spot symmetry, extracting welding spot hue change, marking abnormal frames, recording defect path nodes, and generating a defect path structure. According to the method, the temperature response coordinate points in the welding spot area are extracted and the heat conduction direction vector path is constructed, so that the welding quality is evaluated more carefully and accurately, the thermal grid chart is mapped to the visible light image frame, the image analysis process is further optimized, the defect detection accuracy is enhanced, and the potential defect area is effectively identified; the efficiency and reliability of PCBA board detection are significantly improved, and powerful technical support is provided for high-quality production.

The invention discloses a pulse electroplating detection method, a pulse electroplating device and equipment, and the method comprises the steps: synchronously collecting transient current density data of a three-pole assembly in a pulse switching time window, and calculating a time derivative of a current density ratio to obtain electrochemical stress gradient data; performing space-time correlation analysis on the stress gradient data of the continuous pulse period, and tracking a spatial propagation trajectory of stress anomaly; a key monitoring area is determined according to the propagation trajectory, and ion migration impedance sensitivity distribution is detected through micro-amplitude current modulation; performing multi-dimensional coupling analysis on the stress gradient, the propagation trajectory and the impedance sensitivity data, and identifying time sequence correlation characteristics of stress evolution and ion anomaly; and performing quantitative evaluation and grade division on the electrochemical state of the avoidance area based on the coupling correlation characteristics. According to the scheme, early recognition and predictive evaluation of the ion migration abnormity of the boundary layer of the avoidance area can be realized in the pulse electroplating process, and the electroplating quality control precision and the process stability are remarkably improved.

The invention relates to the technical field of ultrasonic detection, in particular to an electric power equipment ultrasonic phase control array hot spot positioning method, which comprises the following steps: determining a focus area to be scanned according to a winding structure in electric power equipment; establishing a three-dimensional coordinate system, setting a focus coordinate, and determining excitation delay based on the focus coordinate and the coordinate of each array element; controlling the ultrasonic phased array sensor to emit ultrasonic waves in a pulse period based on excitation delay, and receiving reflected sound wave signals; calculating to obtain the delay inequality of each array element ultrasonic signal of each scanning area; an objective function is constructed based on a spatial geometrical relationship between array element coordinates of the ultrasonic phased array sensor and a focus area and delay inequality, hot spot positioning is performed through particle swarm optimization to determine a minimum objective function value, and hot spot coordinate positioning of the electric power equipment is performed. By controlling the excitation delay of each array element of the ultrasonic phased array sensor, acoustic beams emitted by each array element form a focused sound field, a target function is constructed, and hotspot positioning is realized through particle swarm optimization.

The invention relates to the technical field of pulse load energy optimization control, in particular to a pulse type ultra-low power consumption energy management system based on a super capacitor, which comprises a pulse spectrum analysis unit, a capacitor bank dynamic tuning unit and a charge state compensation unit, a pulse spectrum analysis unit extracts a load pulse dominant frequency component through a window function weighting algorithm to generate a target frequency value, and a capacitor bank dynamic tuning unit inquires a mapping table according to the target frequency to adjust series-parallel connection combination of the super capacitors and injects a reverse reactance component to offset a resonant impedance difference value. And the charge state compensation unit predicts the residual charge quantity by using a Kalman filter, and triggers a charge redistribution strategy in a non-pulse period, thereby solving the problems of insufficient dynamic impedance matching and low charge balance efficiency in the traditional technology, realizing high-efficiency and low-consumption management of the energy of the super capacitor, improving the energy transmission efficiency, and reducing the energy consumption. And the endurance time of the equipment is prolonged.

The invention relates to the technical field of health data processing, in particular to a handlebar-based health data real-time analysis and prompt system, which comprises a physiological signal sensing module, a trend feature extraction module, a state level identification module, a prompt scheme selection module and a multimode channel prompt module. According to the method, a multi-source signal sequence is constructed for trend characteristic analysis through synchronous acquisition and time window alignment of four types of signals including pulse beat cycle, grip rate, blood oxygen decreasing time period and contact area frequency, the health state level is judged according to a trend cross-coincidence relation, and a corresponding prompt scheme is matched; through cooperation of the signal change trend, real-time perception and grade classification of the physiological abnormal state of the rider are realized, the pertinence and effectiveness of prompt response are improved, the precision and stability of a continuous prompt intervention mechanism are enhanced, and the problems of potential health risk identification delay and lack of personalized regulation and control of prompt are effectively solved.

A test method and apparatus for bipolar degradation of a diode, and a device. The method comprises: respectively performing static characteristic tests on a first diode and a second diode, so as to obtain a first static characteristic test result and a second static characteristic test result; setting a pulse test current, a pulse test time and a pulse cycle time, so that, on the basis of the pulse test current, the pulse test time and the pulse cycle time, a power semiconductor pulse current test device performs repeated short pulse current power cycle tests on the first diode under normal temperature conditions, and performs repeated short pulse current power cycle tests on the second diode under high temperature conditions; then, performing static tests, so as to obtain a plurality of static characteristic test results; and on the basis of the static characteristic test results, obtaining a bipolar degradation test result of a diode. By means of the method, bipolar degradation of the diode is tested, and the accuracy and reliability of the test result are improved.

The present invention provides a timing signal generating device and method. The timing signal generating device includes: a high-level and low-level duration register, which stores the duration of the high level and low level of each pulse cycle in the timing signal; a level flip threshold providing unit, which obtains the threshold of the high-level and low-level flip time of the timing signal based on the duration of the high level and low level of each pulse cycle in the timing signal; a timing signal level duration counting unit, which receives a trigger signal and counts after receiving the trigger signal; a trigger unit; and an output timing controller, which flips the level signal output by the output timing controller when the count value of the timing signal level duration counting unit reaches the threshold of the high-level and low-level flip time of the timing signal. The timing signal generating device provided by the present invention can flexibly control the timing signal.

A current sensor circuit (1) is provided with: a detection coil (N1) configured such that the inductance changes according to a direct current; a resonant capacitor (C1); a phase adjustment circuit (10) that receives a feedback signal from the resonant capacitor and outputs a drive signal; a switching circuit (20) including a plurality of switching elements (Q1, Q2) forming a half-bridge circuit or a full-bridge circuit, the switching circuit (20) supplying an AC signal to the detection coil and the resonant capacitor by switching the plurality of switching elements in accordance with the pulse period of the drive signal; a signal conversion circuit (40) that converts the drive signal output from the phase adjustment circuit into a detection signal indicating a change in the DC current; and a detection terminal (DCSIG) that outputs a detection signal to the outside.

A current sensor circuit (1) comprises, for example, a sensing coil (N1) configured to change its inductance with a DC current, a resonant capacitor (C1), a phase-adjusting circuit (10) receiving a feedback signal from the resonant capacitor and outputting a driver signal, a circuit (20) having several switching elements (Q1, Q2) forming a half-bridge or full-bridge circuit, wherein the circuit causes the several switching elements to perform a switching operation according to a pulse period of the driver signal, so that an AC signal is supplied to the sensing coil and the resonant capacitor, a signal converter circuit (40) converting the driver signal output by the phase-adjusting circuit into a sensing signal indicating a change in the DC current, and a sensing terminal (DCSIG) outputting the sensing signal externally.

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.

A method for plasma processing a substrate includes: sustaining a plasma in a plasma processing chamber, the plasma processing chamber including a first electrode and a second electrode, where sustaining the plasma includes: coupling a source signal to the first electrode; and applying a bias signal to the second electrode, the bias signal having a spike waveform including a plurality of bias pulses, each of the bias pulses including a DC base voltage for a base duration and a triangular voltage spike having a rise time from the base voltage to a peak voltage and a fall time from the peak voltage to the base voltage, a sum of the rise time, the fall time, and the base duration including a pulse period, the applying including: independently adjusting the rise time and fall time to obtain a narrow energy spread of a mode at a high modal energy in an ion energy distribution function (IEDF) of an ion flux incident on the substrate, the narrow energy spread including a first width of the high energy mode of the IEDF that is smaller than a second width of the high energy mode of the IEDF obtainable using a rectangular pulse waveform.

The invention discloses a low-disturbance self-recovery operation method for a cross-point array ferroelectric memory, which is used for operating a cross-point array ferroelectric memory array, comprises four continuous pulse periods, and sequentially realizes selected memory unit activation, data reading, data recovery and reset operation. By using the low-disturbance self-recovery operation method provided by the invention, the voltage pulse disturbance suffered by unselected units in the operation process of the cross-point array ferroelectric capacitance memory can be reduced, and meanwhile, the function of automatically recovering the data of the ferroelectric capacitance memory is realized. According to the method, smaller read-write disturbance can be realized, the bit error rate is lower, and the access speed is higher.

The invention discloses a torque control method and device, equipment, a storage medium and a program product, and relates to the technical field of motor control, and the method comprises the steps: determining a target pulse width based on a preset pulse width and a preset pulse width change coefficient in response to a torque control instruction, and determining a torque amplitude value based on the target pulse width and a preset torque amplitude value; generating a target pulse modulation signal, and performing torque control based on the target pulse modulation signal; under the condition that the preset torque amplitude is the same and the target pulse width is greater than the preset pulse width, the target area of the target pulse modulation signal in the single pulse period is the same as the area of the preset pulse modulation signal in the single pulse period; if yes, reducing the corresponding torque in a period of time starting from the pulse starting moment and / or a period of time before the pulse ending moment; therefore, the shaking or NVH problem of the whole vehicle is fundamentally relieved, and the driving comfort of the vehicle is improved.

In order to provide a gas cluster ion beam apparatus capable of performing unprecedented high-precision trimming processing by generating a high-speed and high-precision pulse beam and adjusting the pulse width, pulse period, and the like thereof, a switching circuit including a switching device 32 is provided. The switching device 32 is arranged in a power line that supplies a voltage from an ionization power supply 30 for accelerating ionized hot electrons of the ionizer 5 to the ionizer 5 and an anode bar 17 having an equal potential to the ionizer 5. A gas cluster ion beam can be intermittently irradiated onto a substrate (15) to be irradiated, wherein a switching circuit (SWC) controls the on and off of a switching device (32).

A combinatorial optimization problem processing device 100 comprises: a 1 × 2 Mach-Zehnder optical modulator 10 for receiving and modulating a polarization clock pulse train; an optical interference circuit 20 for receiving the polarization clock pulse train modulated by the 1 × 2 Mach-Zehnder optical modulator 10 and generating a predetermined interaction in an Ising model at a period of N pulses of the polarization clock pulse train; a modulating signal generation unit 40 for generating the modulating signal of the 1 × 2 Mach-Zehnder optical modulator 10 by waveform-shaping an electric signal obtained by photoelectrically converting an optical signal output from the optical interference circuit 20 and outputting a monitor signal representing the solution of an optimization problem to the outside; and an initialization control unit 30 for creating a neutral state for interaction between elements to initialize the optical interference circuit 20, by controlling the optical interference circuit 20 to reduce attenuation of the polarization clock pulse train input to the optical interference circuit 20. The combination optimization problem of the N elements is processed in association with the Ising model.

A visualization system (106) with customizable illumination cycles for addressing relative brightness differences between different illumination sources. A system includes an image sensor (124) including an array of pixels (125) and a transmitter (102) including a plurality of electromagnetic radiation sources (138), wherein the plurality of electromagnetic radiation sources includes a first source and a second source. The transmitter cycles at least a portion of the plurality of electromagnetic radiation sources according to a pulse period including a plurality of pulse emissions by the first source and a plurality of pulse emissions by the second source. When the image sensor reads out a data frame corresponding to the transmission of the first source, at least a portion of the plurality of pulsed transmissions of the second source overlaps a readout period of the image sensor.

The invention provides a synchronous correction method for a quantum key distribution system, which can be applied to the technical field of quantum communication. The method comprises the following steps: based on a preset time scale, processing time sequence data collected by a time-to-digital converter by using an optical pulse period of a discrete QKD system and a discrete time calibration optical pulse period to obtain a multi-time-scale statistical counting array; processing the multi-time-scale statistical counting array, and performing multi-time-scale synchronous correction on the discrete QKD system by using the obtained peak position of the discrete time calibration light pulse; processing the voltage amplitude data acquired by the analog-to-digital converter by using the optical pulse period of the continuous QKD system and the period of the continuous time calibration optical pulse to obtain a multi-time scale voltage variance array; and processing the multi-time scale voltage variance array, and performing multi-time scale synchronous correction on the continuous QKD system by using the obtained peak position of the continuous time calibration light pulse.

This state change detection system comprises: a rotation detection unit that outputs a pulse signal; a pulse calculation unit that obtains a pulse calculation waveform representing a pulse period for each rotation angle of a rotating body; a reference generation unit that generates a reference waveform in which an average pulse calculation waveform, which is obtained by averaging values of the pulse calculation waveform with an accumulated value for each rotation angle, is represented by the distribution for one rotation of the rotating body; a rotational fluctuation waveform generation unit that uses the reference waveform to generate a rotational fluctuation waveform obtained by extracting, from the pulse calculation waveform used to generate the reference waveform or a pulse calculation waveform succeeding the pulse calculation waveform, a fluctuation component other than a steady component that steadily occurs with the rotation of the rotating body; and a state change detection unit that detects a change in rotation state on the basis of the rotational fluctuation waveform.

The present invention belongs to the field of fault diagnosis technology, and in particular relates to a gearbox fault diagnosis method and system based on cyclic pulse feature decomposition. The method comprises: constructing a new dictionary matrix, a "cyclic pulse dictionary matrix," to accurately estimate the pulse cycle period contained in a signal formed by mixing multiple periodic pulse signals; using the Goertzel algorithm to obtain the corresponding frequency amplitude according to the order of the energy values ​​of the pulse cycle period; separating and reconstructing the CPCC corresponding to the pulse cycle period, and decomposing the signal into a plurality of CPCCs. The present invention constructs a cyclic pulse dictionary matrix to sparsely represent the pulse cycle period of the periodic pulse signal, accurately estimating the cycle period of the fault pulse feature in the gear vibration signal; and using the Goertzel algorithm to decompose and reconstruct the CPCC in the gear vibration signal according to the pulse cycle period, with the decomposed CPCC containing rich periodic pulse feature information.

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.

This application provides a display device and its driving method. The display device includes a display panel and a control circuit. The display panel includes N regions divided along a scanning direction, each region including multiple pixel units, where N is an integer greater than 1. The control circuit generates a ramp signal and inputs the ramp signal to the multiple pixel units, and sequentially controls the pixel units in each of the N regions to perform data writing and light emission within a driving cycle of one frame. The ramp signal includes N pulse cycles within a driving cycle of one frame. The driving cycle of each pixel unit includes a data writing sub-cycle and a light emission sub-cycle, with the data writing sub-cycle preceding the light emission sub-cycle. The data writing sub-cycle includes one pulse cycle of the ramp signal, and the light emission sub-cycle includes N-1 pulse cycles of the ramp signal. The display device and its driving method provided by this application can solve the technical problem of limited brightness adjustment range in existing display devices.

A signal processing method, circuit and chip, and an electronic device. The signal processing method comprises: performing PWM on an input signal to obtain a PWM positive signal and a PWM negative signal (101); and outputting a positive output signal and a negative output signal on the basis of the PWM positive signal and the PWM negative signal (102), wherein in response to the absolute value of the amplitude of the input signal being greater than a threshold value, one of the positive output signal and the negative output signal includes no pulse, and the other one of the positive output signal and the negative output signal includes two pulses within one pulse cycle. The method can improve the performance of an output signal while improving the performance.

A current sensor circuit includes a detection coil configured such that an inductance changes with a direct current, a resonant capacitor, a phase adjusting circuit that receives a feedback signal from the resonant capacitor and outputs a drive signal, a switching circuit that includes a plurality of switching elements forming a half-bridge circuit or a full-bridge circuit and supplies an alternating current signal to the detection coil and the resonant capacitor by causing the plurality of switching elements to perform a switching operation in accordance with a pulse period of the drive signal, a signal converting circuit that converts the drive signal output from the phase adjusting circuit into a detection signal indicating a change in the direct current, and a detection terminal that outputs the detection signal to the outside.

The invention relates to a distance calculation method for single-photon laser ranging, relates to the technical field of laser ranging, and solves the technical problems that a conventional calculation method needs to solve an equation set, is relatively complex and affects the timeliness of data output by a single-photon laser ranging machine. The calculation method comprises the following steps that: in a distance measurement cycle, a single-photon distance measurement machine emits laser pulses to a target at a pulse period of which the number is greater than or equal to 3; the single-photon laser range finder draws a range finding curve according to the obtained data; after noise is filtered out from the ranging curve, photon counting peaks with the number equal to that of pulse periods appear, and the photon counting peaks are counted by photons. According to the distance calculation method for single-photon laser ranging, a complex equation set does not need to be calculated, the distance calculation process can be simplified, and the distance calculation efficiency is improved.

A system and method for protein detection are provided, configured to non-invasively identify proteins exhibiting specific structural conformations within a biological target. The system comprises a light source operable to irradiate the target at a predetermined pulse cycle, a sound detection device configured to capture acoustic signals generated via the photoacoustic effect, and an information processing unit that analyzes the detected acoustic signals to determine the presence or accumulation of a target protein. This technique facilitates early-stage detection of disease-associated proteins, such as amyloid-β and misfolded α-synuclein fibrils, without requiring complex imaging modalities or invasive biopsy procedures.

The present disclosure relates to ultrasound-based strategies and techniques that are specially designed for time-resolved simultaneous cardiac tissue visualization and intracardiac flow instability mapping. First, to achieve high-resolution tissues images while also acquiring flow data, we devised an acquisition scheme which consists of two batches. The first batch is dedicated to tissue imaging, where we transmit a series of diverging waves emitted from different virtual source locations. These pulses have a single pulse-cycle to optimize axial resolution and are coherently compounded for improving lateral resolution. This paradigm generates tissue images with an improved resolution, allowing for real-time guidance at frame rates up to 50 fps. The second batch is dedicated for flow imaging where all diverging waves are transmitted from the same virtual source location. These flow pulses have a 5-cycle pulse length for improved flow signal. The length of this batch can be adjusted, but our experiments use a length of 64. The final transmission scheme alternates between the tissue batch and flow batch.

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.