208 results about "Multiple pulse" patented technology

The invention discloses a high-resolution peak value positioning method based on multi-pulse superposition and offset clock cooperation, and belongs to the technical field of laser radar ranging. Aiming at the problems that a traditional laser radar depends on a high-sampling-rate ADC, so that hardware cost is high, power consumption is large, and sampling errors are likely to be caused by echo jitter, the method does not need to replace an existing ADC, and the technical breakthrough is achieved through the following core steps that firstly, the basic sampling rate X Hz and the target equivalent sampling rate improvement multiple N of the ADC are determined; laser pulses are emitted to a target object for N times, during Kth emission, ADC sampling is started by delaying (K-1) / (X * N) seconds, and N groups of echo data with time sequence offset are obtained; performing cross combination on the N groups of data, and constructing an N-time equivalent high-sampling-rate data sequence; repeating the sampling and combining process for S times, and performing alignment superposition and averaging on S groups of data to suppress echo jitter and noise; and estimating initial parameters (amplitude, mean value and standard deviation) of a Gaussian model based on the superposed data, optimizing the parameters through an LM nonlinear optimization algorithm, and finally taking the optimized mean value as a high-precision peak position of an echo signal to realize accurate measurement of the laser flight time. Under the condition of low-sampling-rate hardware, through the collaborative design of clock skew and multi-pulse superposition, the physical limitation of the sampling rate is broken through, low cost, low power consumption and high ranging precision are taken into account, and the method is adaptive to multi-scene application of automatic driving, industrial ranging and the like.

The invention discloses a communication-detection integrated sonar signal design method and device based on multi-pulse composite modulation, and the method comprises the steps: dividing a total frame period into a detection sub-frame and a communication sub-frame, enabling the detection sub-frame to achieve the high-resolution distance measurement through employing a bidirectional linear frequency modulation (BILFM) signal, a communication sub-frame adopts a multi-frequency multi-phase composite modulation (MTPM) signal to realize high-bit-rate data transmission; after band filtering, orthogonal demodulation, low-pass filtering and down-sampling preprocessing are carried out on detection sub-frame echoes, distance and speed information is extracted by adopting fast-time low-sampling two-dimensional fast Fourier transform (2D-FFT), unambiguous Doppler frequency is recovered by utilizing the Chinese remainder theorem (CRT), and accurate speed measurement of long-distance and high-speed targets is realized; a communication subframe receiving signal is subjected to IQ demodulation after down-conversion, Costas loop carrier synchronization and matched filtering, and multi-frequency multi-phase coded data are extracted. According to the method, the time-frequency collaborative design of detection and communication is realized, the distance resolution and the speed measurement range are considered, and the signal bandwidth utilization rate and the underwater information transmission reliability are remarkably improved while the system complexity is kept low. The device comprises a processor and a memory, and an executable program for implementing the method is stored in the memory. The technology can be widely applied to the fields of unmanned underwater vehicles, ocean monitoring, underwater sensing networks and the like.

The invention discloses a low-harmonic high-voltage speed regulation system based on a multi-pulse phase-shifting transformer, and particularly relates to the field of power electronic technology and motor speed regulation, which is characterized in that the primary side of the multi-pulse phase-shifting transformer is in star connection, and N groups of windings on the secondary side are in extended delta connection, so that phase difference is realized; the multi-path low-voltage alternating current is converted into multi-path low-voltage alternating current and low-order harmonics are High voltage is output through cascade H-bridge topology series connection, and reliable conversion is guaranteed through rectification filtering inversion and device redundancy design; the motor control module collects signals through multiple sensors, and PWM drive signals are generated through a vector control algorithm and coordinate transformation. The harmonic detection and compensation module detects harmonic waves based on an FFT algorithm, and injects a reverse compensation component through a modulation strategy to offset the harmonic waves; and the auxiliary protection module integrally realizes low-harmonic and high-precision high-voltage motor speed regulation through multi-dimensional monitoring and hardware protection.

The invention discloses an image restoration method and system based on a pulse neural network. The method comprises the following steps: processing an original degraded image to obtain a plurality of degraded sub-images with different resolutions; constructing an image restoration model based on a pulse neural network and a multi-scale feature fusion mechanism, wherein the image restoration model comprises a pulse coding layer, a feature fusion network and a residual pulse decoding layer; the plurality of pulse coding layers are used for respectively carrying out pulse coding on the degraded sub-images with different resolutions to obtain multi-scale pulse characteristics; the feature fusion network adopts a U-Net architecture comprising an encoder and a decoder and comprises a plurality of stages, each stage processes pulse features input by a plurality of pulse coding layers in each stage, and multi-scale feature extraction and fusion are realized to gradually recover high-resolution image details; the residual pulse decoding layer decodes the pulse features to form an image restoration result; the trained image restoration model is used for image restoration, so that the image restoration quality is ensured, the time steps are remarkably reduced, and the energy consumption is reduced.

The invention provides a nutrition pump drop identification method, a nutrition pump and electronic equipment, and relates to the technical field of drop identification, and the nutrition pump drop identification method comprises the steps: obtaining liquid drop detection signals collected by multiple infrared receiving channels; performing signal conditioning processing on each path of liquid drop detection signal to obtain multiple paths of pulse signals; combining the multiple paths of pulse signals into a single-path effective pulse sequence by using redundancy decision logic; and calculating the real-time dripping speed according to the pulse frequency of the single-path effective pulse sequence. According to the scheme, the liquid drop detection signals of the multiple infrared receiving channels are collected in parallel, or operation merging is carried out on the multiple pulse signals through the redundancy judgment logic, effective recognition of liquid drop events can still be maintained when part of channel signals fail, and therefore the fault-tolerant capability and robustness of the detection process are improved.

A UWB tag (10) for detecting the presence of a living object (20) is described, wherein the UWB tag (10) comprises at least one UWB front-end transceiver (11) and is configured to transmit multiple pulses (30) and receive multiple associated reflected channel pulse responses (32), and subsequently evaluate them for changes in the received associated reflected channel pulse responses (32), wherein the detection of the change in the associated reflected channel pulse responses (32) indicates the presence of the living object (20). Furthermore, a method (100) for detecting the presence of a living object (20) using at least one UWB tag and a multi-statistical radar system are described.

By utilizing soliton self-frequency shift modulation, the formation of multiple pulsed light beams is suppressed, while the occurrence of ASE (Autonomous Emission Reduction) is suppressed, and the modulated pulsed light beam is reliably amplified. [Solution] The pulsed light generation device 100 comprises an oscillator 1 that oscillates pulsed light L, a fiber amplifier 2 located downstream of the oscillator 1 in the optical path of the pulsed light L, a soliton shift fiber 5 located downstream of the fiber amplifier 2 in the optical path of the pulsed light L, a branching section 8 located downstream of the fiber amplifier 2 in the optical path of the pulsed light L, and a short-wavelength fiber amplifier 11 located downstream of the soliton shift fiber 5 and the branching section 8 in the optical path of the pulsed light L.

The invention discloses a Karaoke system time delay measurement method and device, and the method comprises the steps: recording sound data collected by a mobile terminal cross-screen Karaoke system, so as to obtain recording data; filtering the recording data to obtain filtered recording data; calculating an RMS value of the filtered recording data; based on the RMS value variable quantity of the current time, determining currently detected pulse information and corresponding time delay; and calculating the average value of the time delays of the multiple pieces of pulse information to obtain the full-link time delay. According to the method, full-link time delay is accurately calculated and obtained by calculating and filtering the RMS value of the recording data and determining the currently detected pulse information and the corresponding time delay by using the RMS value variation of the current time, so that high-precision, low-interference and low-cost time delay quantization is realized, and the real-time performance and synchronism of karaoke experience are optimized.

This invention provides a millimeter-wave isolation circuit and isolator with multiple receiving links. Its millimeter-wave receiving module includes two or more dipole antennas and receiving units connected one-to-one with each dipole antenna. Each dipole antenna and its corresponding receiving unit constitutes a receiving link. The two or more dipole antennas are arranged along their length, with the radiating elements of consecutive dipole antennas connected end-to-end, forming a millimeter-wave receiving antenna array. It is configured to receive the millimeter-wave signal through two or more receiving links and then output two or more identical pulse signals. This invention enables synchronous reception of multiple pulse signals based on a single structure, ensuring minimal time deviation at the receiving end and reducing system power consumption and cost.

The application discloses a self-task planning method for quick maneuvering rendezvous imaging of a spatial space target, and comprises the following steps: step one, multi-pulse control sequence planning: according to task requirements and considering determination of an orbit requirement, a multi-pulse control sequence is given, and the first control is implemented autonomously on the satellite; step two, closed-loop control sequence planning: after the i-th control is finished, the remaining N-i control sequences are given in combination with the orbit of the satellite after control and the orbit of the target, and the i+1-th control is implemented; wherein, i is greater than or equal to 1 and less than or equal to N-2, and the total control times are N; step three, single-pulse transfer planning: after N-1 control is finished, the last control velocity increment is calculated by using a Lambert transfer method in combination with the orbit of the satellite after control and the orbit of the target, and the N-th control is implemented; and step four, imaging task planning. The closed-loop control planning method is given by considering the influence of control errors and orbit errors, the method can ensure that the planning result of each time is basically consistent with the first planning, and the final rendezvous precision requirement is met.

The invention discloses a method for testing the service life of a high-repetition-frequency multi-pulse optical thin film, and the method comprises the steps: determining the range of the total irradiation pulse number of a damage threshold test through finding out the inflection point pulse number of which the damage threshold of a thin film element tends to be stable under high repetition frequency, and providing a basis for the acceleration of service life prediction; in the irradiation pulse number range, the relation between the damage threshold stable value and the repetition frequency is fitted, a thin film life prediction mechanism under the high repetition frequency is established, and the energy density allowed by stable operation of the element under other repetition frequencies can be obtained through calculation. The method is of great significance in improving the service life testing efficiency and accuracy of the optical element.

This invention discloses a method for optimizing airborne radar detection waveforms in multi-pulse accumulation scenarios. The method involves calculating the current transmit modulation vector based on the target airborne radar's current phase-coded waveform, target beam pointing angle, and attribute parameters; calculating the current transmit signal space based on the current transmit modulation vector, current phase-coded waveform, and attribute parameters; calculating the current angular domain waveform based on the current transmit modulation vector and current transmit signal space; determining the current cross-correlation sidelobe level, current autocorrelation sidelobe level, current transmit beam pattern, and current Doppler sidelobe level of the current angular domain waveform and other angular domain waveforms, respectively, and substituting these values ​​into a target optimization function to obtain the current target value; and determining the target transmit waveform based on the current target value and a preset iteration termination condition. This invention significantly improves the radar's anti-sorting and anti-spoofing capabilities while maintaining detection performance.

The present application relates to the field of aerospace technology, specifically to a kind of multi-pulse parallel construction method of gravitational wave detection formation considering timing optimization, each spacecraft of formation simultaneously departs from virtual center, each spacecraft is moved to the preset specified position by applying multiple pulses, so as to form a kind of spacecraft formation that can be used for space gravitational wave detection, by giving the steps of calculating the initial position and velocity of each spacecraft and applying initial control to reach the initial position and velocity, the state quantity of each spacecraft at each time in the formation construction process is calculated, so as to provide reference for the design of satellite formation task in actual engineering application, and the accuracy of the linearized relative motion dynamics model established by the multi-pulse parallel space gravitational wave detection formation is improved by differential correction, the error in the relative motion dynamics model is reduced, the initial state set in advance can be effectively reached, and the working efficiency of formation component is improved.

The embodiment of the invention provides a wide dynamic range signal acquisition method and circuit, and the method comprises the steps: a quadrupole is connected with an ion receiving electrode, the ion receiving electrode is connected with a transimpedance amplifier circuit, the transimpedance amplifier circuit is connected with a threshold comparison circuit, the threshold comparison circuit is connected with a D trigger circuit, and the D trigger circuit is connected with a dead time correction circuit. The lower computer FPGA is connected with the D flip-flop circuit; the quadrupole is used for screening ion signal output; the ion receiving electrode is used for converting the ion signal into a current signal; the transimpedance amplifier is used for converting the current signal into a voltage signal; the threshold comparison circuit is used for turning the voltage signal into a logic level; the D flip-flop circuit is used for outputting a target signal level matched with the lower computer FPGA; and the lower computer FPGA is used for receiving the target signal level and counting the signals acquired by the plurality of pulses through the dead time correction circuit. In this way, the phenomenon of counting omission under high-frequency signals is reduced, and the counting accuracy is improved.

The application provides a pulse repetition frequency type recognition method and device based on graph domain mapping and feature enhancement, and relates to the technical field of radar signal processing. The method comprises the following steps: determining a pulse repetition frequency sequence corresponding to a screened pulse repetition frequency; taking the reciprocal of the pulse repetition frequency sequence to obtain a pulse repetition interval sequence; dividing the pulse repetition interval sequence into multiple subsequences according to a preset length; transforming the multiple subsequences into a Gram difference angle field image according to a graph domain mapping algorithm, and dividing the image into training samples and test samples; constructing a pulse repetition frequency type recognition network, inputting the training samples into the pulse repetition frequency type recognition network, training the pulse repetition frequency type recognition network, and obtaining a trained pulse repetition frequency type recognition network; and inputting the test samples into the trained pulse repetition frequency type recognition network to recognize multiple pulse repetition frequency types. In this way, the recognition accuracy and robustness of the pulse repetition frequency type are improved in a complex non-ideal scene with a high proportion of missed pulses and false pulses.

In MIMO radar systems using the FM-ICW system, interference occurs in the beat signal due to cross-correlation components when the target is at close range. [Solution] The radar transmitter 200 is a transmitting signal that repeats a transmitting chirp signal consisting of multiple pulses having a transmission interval and whose frequency changes over time, and applies one of several classified phase change amounts with respect to the distance to the target to each of the multiple pulses in the transmitting chirp signal, and outputs with a time shift amount; and the radar receiver 300 receives a receiving signal that repeats a receiving chirp signal consisting of multiple pulses of the transmitting chirp signal of the transmitting signal received from multiple receiving antennas 12 that receive the received wave that has been reflected off the target from the transmitted wave from multiple transmitting antennas 11, and generates a beat signal having a frequency that is the difference between the frequencies of the corresponding pulses of the transmitting chirp signal and the pulses of the receiving chirp signal, thereby obtaining distance information to the target.

This invention relates to the field of power equipment monitoring technology, specifically to a method and system for phase remapping-enhanced partial discharge ultrasonic feature extraction. The method first acquires partial discharge ultrasonic signals and power frequency synchronization voltage signals; performs pulse event detection on the partial discharge ultrasonic signals to obtain multiple pulses; extracts the amplitude and occurrence time of each pulse; converts the occurrence time of each pulse into a power frequency phase based on the power frequency synchronization voltage signal; maps the amplitude of each pulse to a power frequency cycle according to its phase, constructing a phase-amplitude sequence; and performs a Fourier transform on the phase-amplitude sequence to extract the amplitudes of the 50Hz and 100Hz components. This invention enhances spectral characteristics through pulse event detection, power frequency phase calibration, and periodic sequence remapping.

The ultra wide band (UWB) technology is a wireless technology that transmits large amounts of digital data over a wide spectrum over a short distance at very low power. However, in order to support their deployment in a wide range of applications, it is beneficial to provide a solution in which a plurality of directional antennas directed in different directions are utilized to ensure spatial filtering of undesired signals and increase signal strength; improving link quality of service with a dynamic configuration of a multi-pulse beam for transmitting bits / symbols within a packet; dynamic configuration of one or more frequency bands operating with the transmitter; and an antenna subsystem for providing an omnidirectional radiation pattern is utilized, filtering and balun functions are provided, the size is small, and the cost is low.

This invention provides a three-state XOR / XNOR gate based on probabilistic devices and its modulation method, relating to the field of semiconductor device technology. The three-state XOR / XNOR gate comprises multiple probabilistic devices connected in series. The resistive state of each probabilistic device exhibits either a high-resistance state or a low-resistance state depending on the input pulse current density. By inputting multiple pulse currents of different current densities, the total voltage across the series connection of the multiple probabilistic devices reaches different voltage ranges, corresponding to logic values ​​1, 1 / 2, and 0, respectively, thus realizing a three-state XOR and XNOR gate. The application of this three-state XOR / XNOR gate is expected to overcome the performance bottleneck of traditional binary circuits and become a key component in AI acceleration, fault-tolerant computing, and novel computing architectures.

The present application relates to a kind of dynamic performance calibration systems for streak camera fast scanning gear, mainly used to solve the technical problems that the operation is complex when multiple pulse trains are generated by the existing light splitting and beam combining mode, and the consistency of optical path difference between each light path is difficult to guarantee, and the conventional electrical signal trigger mode exists sway, influence the time resolution capability calibration of streak camera.The present application can simultaneously generate multiple optical pulse trains, and the time interval consistency between multiple optical pulse trains is high.The optical pulse output by the laser is divided into the first light beam transmitted by the beam splitter and the second light beam reflected, the second light beam is input to the fast-response photodiode, and then converted into an electrical pulse to trigger the streak camera to work.The first light beam is input to the streak camera through the F-P standard device, and the streak camera reads the streak image output by the streak camera and analyzes it.The present application also provides a kind of dynamic performance calibration method for streak camera fast scanning gear.

The invention discloses a bionic camouflage briefcase with an electromagnetic emission function, the bionic camouflage briefcase comprises an outer bionic structure, a middle layer and an inner layer structure, the outer bionic structure comprises a rotatable handle and a layered shell, and the handle is internally provided with a firing button, an emission mode selection button and a fingerprint unlocking device; the inner layer control area comprises a laser rapid aiming device; the middle layer comprises a pulse transmitting device and a pulse energy storage device, the pulse transmitting device is composed of multiple stages of Helmholtz coils in an array mode, the pulse energy storage device is composed of multiple pulse capacitors in an array mode, the pulse capacitors and the multiple stages of Helmholtz coils are connected in parallel to provide transient electric energy, and a transmitting tube is arranged on one side of each stage of Helmholtz coil; unification of camouflage and functionality is realized, the concealment is high, and the exposure risk is reduced; and a multiple safety control mechanism is adopted, so that false triggering and unauthorized use are prevented.

An X-ray imaging system is presented that uses multiple pulsed X-ray source pairs in motion to perform efficient and ultrafast 3D radiography. The sources move simultaneously in constant speed as a group on an arc trajectory. Each individual source also moves fast around its static position in a small distance, but one source moves in the opposite direction to another to cancel linear momentum. The trajectories can also be arranged horizontally at a ring structure. In X-ray source pairs, each source part moves in the opposite angular direction to another to cancel angular momentum. The individual X-ray sources are triggered by an external exposure control unit when they have a speed equal to the group speed but in the opposite linear or angular direction. This allows the sources to remain relatively stationary during activation. 3D data can be acquired in a wider field of view in a shorter time, and image analysis is real-time.

The invention relates to a target sensing method based on a communication signal, and the method comprises the steps: receiving a communication signal transmitted by an active target, the communication signal being a signal combining frequency shift keying and linear frequency modulation spread spectrum modulation; carrying out carrier demodulation on the communication signal to obtain a double-channel baseband signal; performing digital beam forming processing on the double-channel baseband signal to obtain sum beam data and difference beam data; performing matched filtering processing on the sum beam data and the difference beam data; performing multi-pulse coherent accumulation processing on a matched filtering result to obtain distance-Doppler information; determining angle information of the active target based on a ratio relationship between the sum beam data and the difference beam data; and determining the distance, Doppler velocity and angle of the active target according to the distance-Doppler information and the angle information.

A multiple-pulses-in-air (MPiA) laser scanning system configured for measuring the time-of-flight of laser pulses, wherein the computing unit is configured for triggering the transmitter to transmit the send pulses with a varying pulse frequency, wherein the transmitter is configured to have a dead mode, wherein in the dead mode an increase in pulse frequency is effected, wherein in the course of increasing the pulse frequency, a reduction in pulse energy per individual send pulse of the send pulses is provided such that the pulse energy of the resulting return pulses is reduced such that it is below a detection threshold, and a measurement mode, wherein in the measurement mode a reduction in pulse frequency compared to the dead mode is effected.

The application provides a multi-motor pulse speed regulation control method and system, relates to the technical field of motor control, and acquires a target setting quantity and a target motor identifier, converts a target driving parameter according to a parameter set associated with the target motor identifier, the parameter set including an elastic modulus value and a stress relaxation coefficient of a peristaltic pump hose; real-time driving parameters are maintained for multiple pulse output channels respectively and are refreshed at a synchronous time; operation state feedback values of the peristaltic pump channel and the stirring motor channel are collected, a water hammer effect frequency component and an impeller passing frequency component are extracted, and correction is carried out based on the elastic parameters; it is judged whether a cross-channel resonance judgment condition is met, when the condition is met, a frequency correction amount and a phase correction amount are determined and are applied to at least one pulse output channel, so that the resonance risk is reduced and the system operation is stabilized.

A display device includes a display panel including at least one pixel, an EM driver configured to generate an emission control signal of a multi-pulse type multi-toggled in one frame and supply the emission control signal to the at least one pixel, and a scan driver configured to generate a scan signal turned on in at least one off period included in the emission control signal, and supply the scan signal to the at least one pixel, so as to apply an on-bias stress (OBS) voltage to one electrode of the driving transistor and reset the light emitting element.

The invention discloses an airborne ocean laser radar hierarchy and water bottom synchronous three-dimensional reconstruction method. The method comprises the steps of obtaining a three-dimensional point cloud of laser on a water surface according to airborne laser radar data; gridding is carried out on the three-dimensional point cloud of the laser on the water surface, multi-pulse averaging of spatial aggregation is carried out, and signals after gridding aggregation are obtained; and obtaining a water surface peak position, a level peak position and a water bottom peak position, and finally obtaining water bottom and level three-dimensional point clouds at the same time, thereby realizing high-precision three-dimensional reconstruction. According to the method, the thought of voxelized grids is combined, resolution sacrifice caused by multi-pulse averaging in a large space range is avoided, high-resolution three-dimensional reconstruction with adjustable resolution is achieved, a multi-target distinguishing algorithm architecture is designed, and the effect of multi-target simultaneous detection is achieved; the method has reference significance for shallow sea environment detection and shallow sea carbon cycle analysis, and has wide applicability.

This invention belongs to the technical field of fluorescence lifetime measurement, and discloses a fluorescence lifetime measurement method and system based on time-gated fluorescence imaging. The method includes: acquiring multiple frames of fluorescence images of a sample, wherein the frame rate is greater than the pulse frequency of the pulse beam, and the frame rate and pulse frequency are not integer multiples of each other; the phase difference between two fluorescence images is a delay difference between the sampling delay of the two fluorescence images and their respective reference times; the reference time of each fluorescence image is the on-time of the pulse beam corresponding to its acquisition; calculating the average gray level of the fluorescence images; arranging the average gray levels within multiple pulse beam periods according to the sampling delay to obtain a time-gated sequence of average gray level variation with sampling delay; and obtaining the fluorescence lifetime of the sample by data fitting based on the time-gated sequence. Based on this method, the complexity and cost of detection can be reduced, and the limitations on application scenarios can be lessened.

The application belongs to the technical field of fault diagnosis, and discloses a lightning protection device online fault diagnosis method and system based on multi-pulse waveform feature enhancement and a storage medium. Multi-channel synchronous acquisition units are deployed at an SPD body, a power grid incoming line end and a grounding loop to completely capture multi-pulse full-dimension original data. A three-dimensional feature system of fine features in a single pulse, correlation features between multiple pulses and fault source map features is combined with fault sensitivity analysis and ISEDBO algorithm optimization weighting to nonlinearly enhance high-sensitivity deterioration features, accurately amplify cumulative aging and early weak deterioration signals under continuous impact, adopt a VMD-SVD two-stage noise reduction scheme optimized by a scarab algorithm to adaptively separate noise, a power frequency fundamental wave and a pulse transient component, and eliminate pulse reflection crosstalk and pre-sequence residual wave distortion through deconvolution operation while completely retaining fault propagation core features.