196 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 belongs to the technical field of fault diagnosis, and particularly relates to a gearbox fault diagnosis method and system based on cyclic pulse characteristic decomposition, and the method comprises the steps: constructing a new dictionary matrix, namely a cyclic pulse dictionary matrix, to accurately estimate a pulse cycle period contained in a signal formed by mixing a plurality of periodic pulse signals; a Goertzel algorithm is adopted to obtain corresponding frequency amplitudes according to the magnitude sequence of the energy values of the pulse cycle periods; and separating and reconstructing the CPCC corresponding to the pulse cycle period, and decomposing the signal into a plurality of CPCCs. According to the invention, the cyclic pulse dictionary matrix is constructed to carry out sparse representation on the pulse cycle period of the periodic pulse signal, and the cycle period of the fault pulse characteristic in the gear vibration signal is accurately estimated; the Goertzel algorithm is adopted to decompose and reconstruct the CPCC in the gear vibration signal according to the pulse cycle period, and the decomposed CPCC contains abundant periodic pulse characteristic information.

The utility model provides a level-to-pulse activation circuit and a charger, the circuit comprises a time delay circuit, a driving circuit, a switch control circuit and an output circuit, the time delay circuit comprises a first resistor, a second resistor, a first field effect transistor and a first capacitor, and the driving circuit comprises a seventh resistor and a triode. According to the level-to-pulse activation circuit, when a charger is connected, the triode is turned on, at the moment, current sequentially passes through the fourth resistor and the triode to be grounded, the second field-effect tube is turned on, high level is output at the voltage output end, after the first capacitor is charged for a period of time, the first field-effect tube is turned on and grounded, and the triode and the second field-effect tube are sequentially turned off. Therefore, the voltage output end outputs low level, one pulse period is completed, the rising edge of the pulse signal is fast, and the voltage and the pulse width are appropriate. When the battery is powered on, the battery takes power from the charging anode, and when the battery is not charged, the charging anode has no voltage because the first field effect transistor and the triode are turned off, so that power consumption is avoided.

The invention relates to a composite material detection method based on multi-wave ultrasonic reflection, which comprises the following steps: a multi-wave ultrasonic transmitting / receiving transducer generates a multi-wave ultrasonic incident signal, outputs the multi-wave ultrasonic incident signal to a detected composite material, and receives a multi-wave ultrasonic reflection signal from the detected composite material; the multi-wave ultrasonic transmitting / receiving transducer inputs the multi-wave ultrasonic reflection signal into a multi-wave ultrasonic reflection signal fusion and display unit; the multi-wave ultrasonic reflection signal fusion and display unit reconstructs the multi-wave ultrasonic reflection signal to form a multi-wave ultrasonic reflection display signal; performing defect discrimination on the detected composite material according to the time domain characteristics of the multi-wave ultrasonic reflection display signal; wherein the multi-wave ultrasonic incident signals comprise a plurality of incident signals which have different pulse cycles and are suitable for different coupling media, and the multi-wave ultrasonic reflected signals comprise reflected signals corresponding to the incident signals. The ultrasonic detection of the composite material in different detection scenes can be met, and the ultrasonic detectability of the composite material is 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.

A plasma processing apparatus includes: a chamber; a substrate support including a RF electrode; a first RF power supply for generating a first pulsed RF signal; a second RF power supply for generating a second pulsed RF signal; a Vpp detector for detecting a bias Vpp value between the second RF power supply and the RF electrode; and a controller for executing: setting at least two power levels of each of the first pulsed RF signal and the second pulsed RF signal; determining plurality of phases in one pulse cycle; setting a bias Vpp target value in at least one of the plurality of phases; acquiring a representative value of the bias Vpp value in each phase; and adjusting the power level of at least one of the first or second pulsed RF signal in at least one selected phase so that the representative value reaches the target value.

The embodiment of the present invention provides an extracorporeal counterpulsation pressurization system, comprising: a control panel, a computer control center, an air source pressure controller, an air source device, a counterpulsation sequential solenoid valve, an airbag device, and a sensor module. The control panel comprises a display module and a control module, the display module receives the airbag pressure information sent by the sensor module, and the control module sends the pressurization requirement set by the user to the computer control center. The computer control center is connected to the air source pressure controller and the counterpulsation sequential solenoid valve respectively, on the one hand, controls the gas delivered to the airbag by the air source device, and on the other hand, controls the inflation or exhaust state of the airbag through the counterpulsation sequential solenoid valve, so that the airbag pressure value is raised to the gradient pressure value at the highest; the gradient pressure value gradually increases according to the preset rules at every preset time, and stops increasing after reaching the preset terminal pressure value. During the remaining treatment time, the maximum pressure of the airbag in each counterpulsation cycle maintains the terminal pressure value. The sensor module collects the pressure value of the airbag device and transmits it to the control panel. The system can make the airbag pressure rise slowly and gradually to the set treatment pressure in a multi-step form according to the different physical conditions and tolerance differences of the patient, giving the patient a gradual adaptation process, and optimizing the patient's experience and treatment compliance.

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 backlight driving method and a display panel are provided. The backlight driving method provided by the present application uses pulse width modulation technology to modulate a low-level pulse width of a scan signal. By increasing a low-level pulse width to increase the pulse period, a number of high-level pulses is reduced, thereby reducing a high-level pulse time. Therefore, a time for a TFT to receive a high-level voltage is also reduced, thereby improving a stability of the TFT and also improving a problem of a threshold voltage drift of the TFT.

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 invention discloses a leaky coaxial cable balance test method, a storage medium and electronic equipment, and the method comprises the following steps: a signal source is connected with a power divider, a test system is calibrated, and the system is corrected according to required frequency division; the other end of the tested sample is provided with an absorption load; respectively connecting the two spectrum analyzers or equivalent instruments with the corresponding antennas by using test leads; moving the test vehicle from one end of the tested sample until the test vehicle moves to the other end of the tested sample; and subtracting the power levels Nr1 and Nr2 received at the same time, namely at the same position, and then obtaining absolute values, and performing quality evaluation on probability values, namely balance LB, of all the obtained absolute values. According to the invention, by measuring the balance of the cable, point-to-point comparison is carried out on the balance of the two cables with different polarizations, so that the deviation of a test value caused by different signal source electronic pulse periods and test position changes in the test process is avoided. And compared with the prior art, the reliability of the cable balance test can be obviously improved, the test repetition precision is improved, and the method is suitable for popularization and application.

The invention discloses a straddle type monorail turnout redundancy control switching method and device, electronic equipment and a storage medium, and the method comprises the steps: enabling a first PLC (Programmable Logic Controller) and a second PLC to respectively generate a continuous heartbeat signal with a pulse period T after a straddle type monorail turnout redundancy control system is started, communication connection is established between the display screen and a preset PLC (Programmable Logic Controller); tracking a heartbeat signal of a PLC (Programmable Logic Controller) currently connected with the display screen to obtain a change state of the heartbeat signal of the currently connected PLC; and according to the change state of the heartbeat signal of the currently connected PLC controller and a preset connection switching condition of the PLC controller, switching the connection state between the display screen and the first PLC controller and the second PLC controller which are redundantly arranged. According to the invention, the adaptability of equipment and the reliability of a redundancy control system can be improved.

The invention provides a display device and a driving method thereof. The display device comprises a display panel, the display panel comprises N partitions divided in the scanning direction, each partition comprises M rows of pixel units, each pixel unit comprises a pixel circuit and a light-emitting device, and N and M are positive integers; the driving circuit is electrically connected with the pixel units, and the driving circuit is used for generating oblique wave signals, inputting the oblique wave signals to the pixel units and sequentially controlling the pixel units of each of the N partitions to carry out data writing and light emitting in the driving period of one frame of picture; wherein the ramp signal comprises a plurality of pulse periods in the driving period of one frame of picture, the driving period of the pixel unit of each partition comprises a data writing stage and a light emitting stage, the data writing stage is prior to the light emitting stage, and the light emitting stage comprises the plurality of pulse periods of the ramp signal. According to the display device and the driving method thereof provided by the invention, the flicker problem of the display panel when the display panel displays a low-gray-scale picture can be 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).

The invention relates to a constant-pressure pulse jet impact rotating wall particle image velocity measurement experimental device and method, comprising a variable frequency motor, a coupling, a first axis, a second axis, a disc, an outer square inner circle water tank, a CCD camera, a sheet light source, a laser, a synchronizer, a computer, a copper pipe, a pulse generator, a valve, a flow meter, a constant water tank, a downpipe, a water pump, and a water reservoir; the constant water tank is arranged on the upper side of the water reservoir, and the outer square inner circle water tank is arranged on the side of the water reservoir; the outer square inner circle water tank comprises a square outer water tank and a circular inner water tank, the circular inner water tank is arranged in the square outer water tank, both ends of the circular inner water tank are open, one end of the circular inner water tank is fixed to the square outer water tank, and the other end leaves a gap with the square outer water tank; through the invention, PIV can be accurately, comprehensively and systematically used to study the influence of different Reynolds numbers, impact distances, wall rotation speeds and pulse periods on various flow characteristics in a flow field.

The present invention discloses a Flash beam dose control method and related equipment, and relates to the technical field of particle therapy, wherein the method comprises: obtaining a Flash beam output dose requirement; controlling the number of pulse periods of an output beam charge within a preset time through a Flash debugging mode; and / or controlling the pulse width of an ion source voltage through a pulse width mapping curve to achieve control of the Flash beam output dose rate; by accurately controlling the number of pulse periods of the output beam charge and the pulse width of the ion source voltage, accurate control of the Flash beam output dose rate can be achieved; and without additionally adding a shielding function to a proton machine room, the Flash dose can be debugged in a conventional proton machine room, which is conducive to the realization of particle Flash radiotherapy.

Embodiments of the present invention provide a signal processing method, device, and processing chip, relating to the technical field of signal processing. The signal processing method includes: encoding an audio-visual signal to be processed into an input pulse signal that lasts for multiple pulse cycles; when the processing chip is configured for each pulse cycle of the input pulse signal, each layer of the spiking neural network is sequentially mapped into the processing chip, and the processing chip obtains an output pulse signal of the spiking neural network within the pulse cycle based on the input pulse signal within the pulse cycle; according to the output pulse signals of the spiking neural network within multiple pulse cycles, a processing result after the audio-visual signal is processed by the spiking neural network is obtained. In the present invention, complex streamline operations of a spiking neural network can be implemented using a single processing chip, reducing the computing power requirements for the processing chip.

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.

The present invention discloses a portable multiplication period signal generating device, comprising a signal generating device, the signal generating device comprising a signal generating body and a signal control board, the signal generating body having a built-in multiplication period signal generating module, the multiplication period signal generating module comprising a period gear control circuit, an exponential voltage generating circuit, a pulse period generating circuit, and a current period generating circuit, the current period generating circuit being electrically connected between the exponential voltage generating circuit and the pulse period generating circuit, the exponential voltage generating circuit being used to generate an exponential voltage, the exponential voltage outputting a pulse period signal through the pulse period generating circuit, and the exponential voltage outputting an exponential current through the current period generating circuit. The portable multiplication period signal generating device of the present invention can realize the generation of a pulse period signal only through a pure hardware circuit, thereby improving the reliability of the signal generating device test.

The present application relates to the field of intelligent sensor technology, and specifically to a method and system for measuring current through an electrometer of a radiation monitor, the method comprising: obtaining a pulse current signal of an electrometer in a radiation environment, dividing the pulse current sequence into pulse periods, obtaining the overshoot reaction degree in each pulse period according to the difference between each maximum value and the maximum value of the current in each pulse period, and the rate of change between adjacent maximum values ​​and minimum values ​​in the current value of each pulse period, and obtaining the ringing fluctuation deviation of each pulse period in combination with the degree of current fluctuation when ringing occurs in each pulse period, obtaining the distortion coefficient of each pulse period, analyzing the current change distribution of multiple sampling moments that are closest to the time interval of each sampling moment, and then obtaining an adaptive search window at each sampling moment, and filtering the pulse current to obtain the electrometer current measurement result. The present application can realize the accurate measurement of the electrometer current in the radiation environment.