165 results about "Pulse period" patented technology

Electroporation-based therapies (EBTs) employ high voltage pulsed electric fields (PEFs) to permeabilize tumor tissue, resulting in changes in passive electrical properties detectable using electrical impedance spectroscopy (EIS). Currently, commercial potentiostats for EIS are limited by impedance spectrum acquisition time (˜10 s); this timeframe is much larger than pulse periods used with EBTs (˜1 s). Fourier Analysis SpecTroscopy (FAST) is introduced as a methodology for monitoring tissue inter-burst impedance (diagnostic FAST) and intra-burst impedance (therapeutic FAST) during EBTs. FAST is a rapid-capture (<<1 s) technique which enables monitoring of inter-burst and intra-burst impedance during EBTs in real-time. FAST identified a frequency which delineates thermal effects from electroporation effects in measured impedance. Significance: FAST demonstrates the potential to perform EIS, in addition to intra-burst impedance spectroscopy, using existing pulse generator topologies.

The invention discloses a method for dynamically adjusting the frequency of a resonant cavity of a cyclotron and a tuning circuit, which are applied to the field of cyclotrons and solve the problem that when the frequency of the resonant cavity of the cyclotron is adjusted by judging the magnitude of reflection power, due to the fact that the reflection power can change in multiple stages in a single macro pulse period, the frequency of the resonant cavity of the cyclotron is adjusted. And an accurate numerical value is difficult to obtain through a simple amplitude sampling circuit. According to the invention, through determining the stable resonance time period of the resonant cavity, the phase difference between the incident power signal and the reflection power signal is sampled in the corresponding stable resonance time period of the resonant cavity, and the change value of the phase difference between the incident power signal and the reflection power signal is dynamically compared. According to the conversion relation between the phase difference change value and the frequency change value, the resonant cavity frequency change value is obtained through conversion, then the resonant cavity tuning device is adjusted to enable the resonant cavity frequency to be consistent with the frequency of the incident power signal all the time, and the dynamic tuning method of the resonant cavity is achieved.

Embodiments of the present application provide an electronic device and its driving method, display driver, and processor, relating to the field of electronic technology. These devices are used to ensure that the actual screen refresh rate can promptly respond to the image refresh rate of a core processing chip, such as an upper-layer SOC. The electronic device includes a display driver IC (DDIC) and a system-on-chip (SOC). The display driver IC (DDIC) is used to transmit a time-of-flight (TE) signal. The TE signal has a first fixed frequency f1, where f1 is a common multiple of the multiple screen refresh frequencies f supported by the electronic device. For example, if the electronic device supports 60 Hz, 90 Hz, and 120 Hz, then f1 is 360 Hz. The SOC is used to receive the TE signal and output display data to the display driver IC at a variable frequency f2. Here, f1 = n * f2. Therefore, the pulse period of f1 is the first pulse period T1, and the pulse period of f2 is the second pulse period T2, where T2 = n * T1. n is the ratio of f1 to the current frame's f. The second pulse period T2 of the current frame f2 is always n times the first pulse period T1 of f1, meaning that display data is always transmitted once every n T1s. n varies with the screen f.

In certain aspects, a memory device includes memory strings each including a drain select gate (DSG) transistor, memory cells, and a source select gate (SSG) transistor, and a peripheral circuit coupled to the memory strings. The peripheral circuit is configured to, in a program operation, program a select memory cell of the memory cells in a select memory string of the memory strings, and inhibit an unselect memory cell of the memory cells in an unselect memory string of the memory strings. The peripheral circuit includes a word line driver configured to in a pre-pulse period and a post-pulse period in a first loop of the program operation, turn off the DSG transistor in the unselect memory string, and in at least one of a pre-pulse period or a post-pulse period in a second loop of the program operation after the first loop, turn on the DSG transistor in the unselect memory string.

An Optical Time Domain Reflectometer (OTDR) includes a transmitter configured to transmit first OTDR pulses, at a first pulse period and at a wavelength λ, over a fiber under test; a receiver configured to receive signals from the fiber under test; and circuitry configured to set the first pulse period and to average measurements resulting from the received signals, wherein the OTDR is configured to operate with a second OTDR at another end of the fiber under test for a bidirectional OTDR measurement, wherein the second OTDR uses the same wavelength λ and transmits second OTDR pulses at a second pulse period, different from the first pulse period.

The invention provides a knob dimming method which comprises the following steps: S1, when a falling edge is detected in each interruption of a program, performing input falling edge interruption on a pin A, and then starting a timer; s2, judging whether the timing time of the timer is up or not, if not, returning to S1, and if so, reading the signal level of the pin A; and S3, judging whether the signal level of the pin A read in S2 is a low level or not, if not, returning to S1, and if so, judging that the level of the pin A is valid. According to the invention, the effective level can be rapidly obtained after the level recovers to be stable, the maximum delay time or pulse period is not measured again by means of device replacement, the knob level is read by dynamically setting timing, misjudgment is greatly avoided, and in addition, the problem of pulse signal counting coverage caused by rapid rotation of the knob is also solved.

A Flash beam dose control method and a related device. The Flash beam dose control method comprises: obtaining a Flash beam output dose demand; controlling, by means of a Flash tuning mode, the number of pulse periods of output beam charges within a preset time; and / or controlling the pulse width of an ion source voltage by means of a pulse width mapping curve, so as to control a Flash beam output dose rate. By precisely controlling the number of pulse periods of output beam charges and the pulse width of the ion source voltage, the Flash beam output dose rate can be precisely controlled without requiring an additional shielding function for a proton therapy room, so that the dose of Flash can also be tuned in a conventional proton therapy room, thereby facilitating implementation of particle Flash radiotherapy.

The invention discloses an electrical stimulation device for cycle-by-cycle myoelectricity feedback regulation. An electrical stimulation circuit of the electrical stimulation device is used for releasing a stimulation pulse cycle signal; the electrical value acquisition circuit is used for acquiring electrical value signals of muscle nerves during a stimulation interval and feeding back the electrical value signals to the electrical stimulation circuit; the electric value acquisition circuit comprises an acquisition input module, a frequency selection amplification module and a charge discharge module; the acquisition end of the acquisition input module is connected with the frequency-selecting amplification module through the solid-state relay; a bleeder resistor of the charge discharge module is connected with the frequency-selecting amplification module through a solid-state relay; by adopting the solid-state relay, higher switching speed and silent switching can be realized, and the cycle-by-cycle quick switching of acquisition and stimulation is realized. And the electrical stimulation circuit adjusts electrical stimulation parameters and intensity of stimulation physiotherapy according to the feedback signal, so that the stimulation parameters are adjusted and controlled periodically one by one, and the physiotherapy effect is more accurate and more effective.

The invention relates to the technical field of medical data processing, in particular to an intelligent drainage method and system based on cerebrospinal fluid pressure, and the method comprises the steps: obtaining a pressure signal curve and a pulse period of a cerebrospinal fluid intelligent drainage system at each detection position; obtaining a synchronous conduction error value according to the signal change trend in the pulse period of the to-be-analyzed signal curves of each detection position and other detection positions in combination with the signal change trend between the historical signal curves; according to the signal delay condition between pulse periods in the signal curve to be analyzed of each detection position and other detection positions, combining the signal delay condition of the historical signal curve to obtain a signal delay characteristic value; according to the synchronous conduction error value, the signal delay characteristic value and the signal change trend, analyzing the signal artifacts of each pulse period in the signal curve to be analyzed to obtain an artifact-removed signal; the de-artifact signal is used for a drainage operation. According to the invention, the occurrence of misrecognition is reduced, and the reliability of intelligent drainage decision is ensured.

The invention relates to the technical field of radars, in particular to a weather radar distance resolution calibration method and system. The method comprises the following steps: collecting oversampling original baseband I / Q data of a point target in a plurality of continuous pulse periods; determining a pulse signal-to-noise ratio, and screening out effective pulses according to a threshold value; carrying out sub-sampling stage time alignment on the effective pulses based on cross-correlation analysis, and carrying out incoherent averaging on power module values of all the aligned pulses to generate an average pulse power envelope; converting the average pulse power envelope to a logarithm domain, and selecting discrete data points in a main lobe region; according to the discrete data points, a nonlinear least square method is adopted to carry out iterative fitting on the generalized Gaussian mathematical model, and a continuous analytic function describing the pulse envelope is obtained; according to the continuous analytic function, determining a pulse time width when the power is reduced to a peak value of-6dB; and determining the real distance resolution according to the pulse time width. The measurement robustness is improved, and sub-meter calibration precision is achieved.

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.

There is provided a touch sensing display device including: a display panel including a plurality of touch blocks divided into at least one active touch block and at least one passive touch block with respect to a touch input position, each touch block being provided with a plurality of touch nodes; and a plurality of sensing circuits configured to fully sense touch nodes of the active touch block at a first time corresponding to an entire pulse period of the touch driving signal, and to half-sense touch nodes of the passive touch block at a second time based on the touch driving signal, the first time corresponding to the entire pulse period of the touch driving signal, and the second time corresponding to the entire pulse period of the touch driving signal. And the second time corresponds to an odd pulse period or an even pulse period of the touch driving signal.

The application provides a bearing gear fault automatic diagnosis method, system, equipment and storage medium, the method comprises the following steps: obtaining a sampling frequency through a spectrum sensing sampling frequency convex optimization algorithm; obtaining the installation number of a signal sensitive sensor through a multi-factor weighted constraint scaling algorithm; obtaining a signal to be processed according to the sampling frequency and the installation number of the signal sensitive sensor, processing the signal to be processed, and obtaining a fault diagnosis result; the bearing gear fault automatic diagnosis method solves the problem of monitoring the inventory equipment; when processing the signal, a hardware pulse is used as a sampling clock source, software interruption and the delay and jitter of calculation are avoided, high-precision synchronous sampling is realized, the non-stationary phenomenon of the signal caused by speed fluctuation is eliminated, and the signal analysis precision is improved; speed measurement and sampling frequency adjustment are completed within one pulse period, the response is fast, and high-speed and high-dynamic speed changes can be tracked; the bearing gear fault automatic diagnosis method has a wide application range and high practicability.

Provided in the embodiments of the present application are a signal processing method, circuit and chip and an electronic device. The signal processing method comprises: performing PWM modulation on an input signal to obtain a PWM positive signal and a PWM negative signal; and, on the basis of the PWM positive signal and the PWM negative signal, outputting a positive output signal and a negative output signal, wherein in response to the amplitude of the input signal being not equal to 0, the positive output signal and the negative output signal each comprise two pulses in one pulse period. The present solution can reduce the frequency requirements for passive filters processing positive output signals and negative output signals, thereby reducing the cost of signal processing systems.

A method for etching a substrate includes pulsing an RF power at a given frequency to generate a plasma for etching the substrate where each pulse period has an ON-state and an OFF-state comprising a duty cycle, selecting an ON-state duration of the duty cycle based on, at least in part, a first duration for restriking the plasma, a second duration for a minimum on-time per a given RF power source providing the RF power, and a third duration for the plasma to reach a steady state, selecting an OFF- state duration of the duty cycle for each pulse period to alter a profile loading, a iso-dense depth loading, or a critical dimension (CD) loading etching effect associated with a feature to be formed on the substrate, and forming the feature by using the duty cycle for the RF power to etch the substrate.

The application relates to an ANPC three-level converter and a narrow pulse elimination method and device thereof, and is characterized by comprising the following steps: collecting signal data of a converter to calculate initial comparison values of a pulse modulation module of the converter for generating a pulse width modulation wave; calculating a narrow pulse lower limit value T down and a narrow pulse upper limit value T up according to a clock frequency T clock , a dead time T s , a narrow pulse time T N and a pulse period T PRD of the pulse modulation module; when the initial comparison value is greater than the narrow pulse upper limit value T up , setting a final comparison value as the narrow pulse upper limit value T up ; when the comparison value is less than 0, performing positive processing on the initial comparison value to make the final comparison value a positive value; when the comparison value is less than the narrow pulse lower limit value T down , setting the final comparison value as 0; and generating a pulse width modulation wave for regulating the converter by using the final comparison value. The problem that narrow pulses easily cause damage to power devices in the converter is solved.

The present invention discloses a residual current protection test method, which belongs to the field of low-voltage electrical technology. A simulated residual current signal is input to a test coil on a residual current transformer, and the residual current protection function module is verified to be normal based on the response of the residual current protection function module to the simulated residual current signal; the simulated residual current signal is input according to the following method: an identical pulse signal is input at both ends of the test coil according to a time difference Δt, and the time difference Δt satisfies: t w ≤Δt≤T‑t w , t w , T represent the pulse width and pulse period of the pulse signal, respectively. The present invention also discloses a residual current protection test device and a circuit breaker. Compared to existing technologies, the present invention effectively eliminates the effect of residual magnetism on the measurement accuracy of the residual current transformer without requiring demagnetization during the test process. Furthermore, the present invention has a simple circuit structure, low implementation cost, and high reliability.

The present invention relates to the field of radio frequency measurement technology, and discloses a broadband pulse measurement method based on a vector network analyzer. Aiming at the problem that the device under test cannot withstand long-term high-power signals, a special measurement scheme is designed for the vector network analyzer. The radio frequency source signal is modulated by a pulse switch, and the signal is down-converted to an intermediate frequency after passing through the device under test, and the intermediate frequency is then pulse modulated and filtered. A pulse modulation source is designed for radio frequency and intermediate frequency signal modulation and reception sampling synchronization to ensure that the sampling bandwidth is within the positive pulse width of the pulse period. When sampling, a reference pulse rising edge is introduced to trigger the digital down-conversion working state. After software delay, sampling is performed to achieve synchronization between sampling and intermediate frequency signal, and the results are accurate, stable and fast. In addition, in order to achieve distortion of the intermediate frequency signal link after radio frequency modulation, a modulation signal is introduced to further modulate and improve it. This scheme can effectively measure the amplitude-frequency characteristics, phase and other characteristics of the device under test.

The embodiment of the invention discloses a pulse synchronization method and device based on a microwave detection system, equipment and a medium. The method comprises the following steps: receiving an emission signal of an external radar, and preprocessing the emission signal to obtain amplitude data and phase data; performing pulse measurement on the amplitude data to determine a pulse width, and performing frequency calculation on the phase data to determine a pulse frequency; judging whether the pulse width and the pulse frequency both trigger pulse synchronization processing or not according to a preset pulse parameter range; and if the pulse width, the pulse frequency and the pulse period are triggered, a pulse period is obtained, the pulse width, the pulse frequency and the pulse period are judged through a state machine, and pulse data synchronized with the external radar are determined. By implementing the method provided by the embodiment of the invention, the problem that the microwave detection data of the pulse radar signal cannot be synchronously acquired in the prior art can be solved.

The invention discloses an automated guided vehicle cooperative positioning system, method and device and a storage medium. Comprising at least one light pulse transmitter and at least one vehicle body receiver, the optical pulse transmitter is used for generating and transmitting a scanning optical signal and an optical pulse signal according to the synchronous optical signal; the vehicle body receiving module is used for obtaining the mixed signals, conducting signal separation on the mixed signals to generate separation signals and determining the vehicle body position posture of the automatic guiding vehicle based on the separation signals, and the mixed signals comprise the synchronous optical signals, the scanning optical signals and the optical pulse signals. A global optical synchronization mechanism is introduced, a fixed-period synchronous optical signal covered by a whole space is realized by designing an optical pulse transmitter, a pulse period is introduced to carry out signal separation, and cooperative positioning of multiple guide vehicles is finally realized by determining the position and attitude of a vehicle body, so that the positioning precision and reliability are improved, and more efficient and accurate cooperative transportation is realized. And the logistics efficiency and the production automation level are improved.

The present invention provides a radar co-frequency asynchronous interference suppression method based on slow-time interpolation, the method comprising: extracting sample data sets X of the same range gate Nr received by the radar in the slow-time dimension. Nr_i The sample data group X Nr_i The process involves filtering to identify pulse period sequence group K containing interference signals. j And the pulse period sequence number group K that does not contain interference signals s The interference signal is restored; slow-time dimension sample interpolation is performed to obtain the processed signal X'. Nr_Kj Improve the performance of the radar.

The invention relates to the technical field of industrial automatic control, and discloses an industrial automatic dust-free production control system and method for konjaku flour, and the system comprises a fluidized bed type jet mill, a pulse control module, a multi-dimensional online sensing module, an in-situ conditioning module and a cooperative control core module. The core of the system is that the cooperative control core enables the system to operate in an alternating working pulse period and a dormancy conditioning period through a pulse control module. In the dormancy conditioning period with low energy, the multi-dimensional online sensing module collects state parameters such as resonant frequency, temperature and images of materials. And the cooperative control core makes a decision based on the parameters, starts the in-situ hardening and tempering module as required to carry out cooling or embrittlement processing, and adaptively adjusts the duration of the next working pulse period to form closed-loop control. According to the invention, the automation of the whole production process is realized, the thermal damage of the material is effectively prevented, and the high consistency of the product quality and the robustness of the production process are ensured.

To generate a photoacoustic image in which an influence of a synchronization shift between an optical pulse period and a reception period is removed.SOLUTION: A vibrator array 22 receives a photoacoustic wave from a light absorption element 18a in a state that an insertion member 18 is inserted into a living body 16. An analyzer 50 calculates a synchronization shift on the basis of an acquired reception signal string. A plurality of correction devices 32 correct a plurality of reception signals on the basis of the synchronization shift. The plurality of reception signals after correction are subjected to phasing addition. A photoacoustic image is generated on the basis of the reception information after correction generated by the phasing addition. The synchronization shift may be calculated on the basis of a pseudo-reception signal string.SELECTED DRAWING: Figure 1

This invention discloses an adaptive waveform scheduling method for swarm target tracking based on deep reinforcement learning. By constructing a state space that integrates swarm motion characteristics and spatial distribution, a composite reward function is designed to comprehensively optimize tracking accuracy, resolution, and trajectory stability. A Deep Belief Policy Gradient (DDPG) framework enhanced with Long Short-Term Memory (LSTM) networks is employed to dynamically determine waveform parameters (pulse width, bandwidth, and pulse period). Compared to traditional rule-based scheduling methods, this algorithm can effectively handle dynamic formation changes in swarm targets, balancing tracking accuracy, resolution, and stability in complex scenarios.

Fault detection of an intravascular lithotripsy (IVL) device and a circuit including one or more transmitters. The balancing current circuit comprises a high voltage power supply, a control device or console, and at least one emitter comprising a pair of electrodes between which a spark is to be generated. Under normal working conditions, voltage is applied through the two conductors, a closed circuit is formed, and current flows between the two conductors when sparks occur. In normal cases, the current IC on the first conductor from the console to the transmitter is the same as the current IR on the second conductor from the transmitter back to the high voltage power supply. In this case, the circuit is in a balanced state. In such a balanced state, there is no sign of current leakage of the circuit. In the imbalance state of the circuit, the current IC is compared with the current IR, showing the current amplitude difference of the pulse over time during the pulse period. Specifically, when the current IR is less than the current IC, there is a circuit imbalance, which indicates a loss or leakage of the current IF.

The present disclosure provides a display module and its driving method, and a display device, which belong to the field of display technology. The display module includes a plurality of pixels, a plurality of data lines, and a plurality of light-emitting control lines. In this method, data signals with different potentials can be provided to the plurality of data lines in the display stage and the reset stage, and a light-emitting control signal with a plurality of pulse periods can be provided to each light-emitting control line to drive the plurality of pixels to emit light. Because the switching points between each two adjacent pulse periods in the light-emitting control signal provided do not overlap with the reset stage, that is, they all avoid the reset stage, it is possible to avoid the potential jump of the data signal in the reset stage affecting the potential of the light-emitting control signal, thereby improving the display abnormality problem caused by signal delay, and ensuring a better display effect of the display module.

The invention provides a non-uniform double-pulse modulation method based on a TCM. The non-uniform double-pulse modulation method comprises the steps that 1, a non-uniform double-pulse period modulation model is constructed; 2, carrying out radar echo modulation analysis; 3, analyzing a pulse compression result; and step 4, regulation and control effect analysis based on a CFAR detector. According to the method, the key parameter of the time delay factor is innovatively introduced, the modulation flexibility and unpredictability are greatly improved through the collaborative design of three degrees of freedom, and the problems of insufficient flexibility and the like existing in a radar target feature regulation and control method are solved. Compared with a regulation and control method based on TCM uniform monopulse period modulation, the generated harmonic peak amplitude distribution is diversified, screening of regular signals by a radar CFAR detector is effectively avoided, and the number of effective harmonic peaks passing detection is remarkably increased. According to the invention, precise suppression or enhancement of specific-order harmonics can be realized, and a technical approach is provided for implementing flexible and dynamic radar target feature regulation and control.

The embodiment of the invention provides a signal processing method and circuit, a chip and electronic equipment, and the method comprises the steps: carrying out the PWM modulation of an input signal, and obtaining a PWM positive signal and a PWM negative signal; outputting a positive output signal and a negative output signal according to the PWM positive signal and the PWM negative signal; wherein in response to the fact that the absolute value of the amplitude of the input signal is larger than a threshold value, one of the positive output signal and the negative output signal does not comprise pulses, and the other one of the positive output signal and the negative output signal comprises two pulses in one pulse period. According to the scheme, the performance of the output signal can be improved while the performance is improved.

The invention provides an ultrasonic imaging system and a synchronization control method. In an ultrasonic imaging system that images the position of an insert using a photoacoustic effect, an optical pulse period and a reception period are correctly synchronized. An insertion member inserted into a living body (16) has a light absorbing element (18a) that absorbs a light pulse and generates a photoacoustic wave. The analyzer (52) calculates a synchronization deviation from the photoacoustic wave signal sequence included in the received signal sequence before the phasing addition. The synchronization controller (54) changes the optical pulse period or the reception period in accordance with the synchronization deviation. The synchronization deviation may also be calculated on the basis of a pseudo received signal column corresponding to the received signal column.