77 results about "Phase synchronization" patented technology

This invention provides a method and system for alarm event reporting and remote response linkage based on wireless communication, relating to the field of intelligent security monitoring technology. The method includes: collecting raw sensor data at three-dimensional spatial state sensing anchor points deployed on the top of the equipment casing (acoustic resonant cavity), the bottom inertial reference plane, and the lateral electromagnetic shield); performing trajectory decoupling and phase synchronization processing on the raw sensor data to obtain processed data; converting the processed data into a unified alarm trigger event; performing multi-source feature analysis on the alarm trigger event to obtain event analysis results; extracting the spatial vector coordinates and dynamic stress distribution gradient of the three-dimensional spatial state sensing anchor points based on the event analysis results, introducing the attenuation characteristics of intermolecular van der Waals forces to map the signal field, and constructing a three-dimensional spatial situation fitting ellipsoid. This invention achieves efficient end-to-end coordination between on-site alarms and remote dispatching.

The application discloses a kind of based on waveform tracking and active reverse phase air supplementing volumetric pump outlet pulsation suppression system and control method thereof, it is related to pulsation suppression technical field, for solving the problem that volumetric pump outlet pressure pulsation causes fluid delivery instability and affects system operating state during operation, by the real-time acquisition and phase analysis of the outlet pressure waveform of the volumetric pump to be measured, pressure fluctuation trend is constructed, based on phase reverse matching generation air supplementing regulation instruction realizes the reverse phase synchronization of air chamber regulation action and pressure change, and dynamic evaluation and compensation correction are carried out to gas-liquid coupling characteristics in combination with liquid level response, while introducing hysteresis control mechanism to closed-loop judge regulation termination and pulsation return state, to realize the adaptive suppression of pressure pulsation under different operating rhythm, improve outlet pressure stability, reduce pulsation residual amplitude, enhance system dynamic response consistency and operating reliability.

This invention discloses a fault diagnosis method for scraper conveyors, relating to the field of fault diagnosis technology for coal mine transportation equipment. The invention includes synchronously acquiring the drive motor current signal, drive sprocket vibration signal, and driven sprocket acoustic emission signal to construct a synchronous data stream; extracting the heavy-load starting current fluctuation range and extracting corresponding vibration and acoustic emission signal segments; performing phase-synchronized integer-cycle extraction and envelope demodulation analysis on the vibration signal based on the real-time rotation phase of the sprocket to generate a phase-synchronized vibration envelope demodulation spectrum; calculating the cumulative energy change rate of the acoustic emission signal and dynamically generating weighting coefficients to weight and enhance the vibration envelope demodulation spectrum to obtain an enhanced fault feature spectrum; matching this feature spectrum with a preset fault feature spectrum library to output the fault type and fault confidence level. This invention can accurately remove signal aliasing interference under heavy-load starting conditions, improve the purity and sensitivity of fault feature extraction, and significantly improve the accuracy of fault diagnosis.

The present disclosure provides a communication radar integrated optical fiber remote system and a phase locking method. A remote antenna unit is configured to receive a reflected microwave signal, and modulate the amplitude of the microwave signal to obtain an initial optical carrier signal. A dispersion compensation unit is connected with the remote antenna unit and configured to perform dispersion compensation on the initial optical carrier signal to obtain an optical carrier signal. A central unit is connected with the dispersion compensation unit and configured to perform phase locking using the received optical carrier signal to obtain an output optical signal. The frequency of the output optical signal is the same as that of the optical carrier signal, and the phase of the output optical signal is the same as that of the optical carrier signal. A signal output unit is connected with the central unit and configured to output the output optical signal. The present disclosure realizes the consistency of the frequency and the phase synchronization of the output optical signal and the optical carrier signal, realizes low phase noise carrier recovery, and improves the communication and radar performance.

The application relates to the field of aviation propulsion systems, and provides an open rotor flow field measurement method and system.The method comprises the following steps: predicting the gradient distribution of a flow field based on a fluid mechanics neural network, determining high and low gradient regions, arranging measurement points, and obtaining a measurement point array; capturing sound pressure signals of a blade passing frequency, calculating phase angle information of the blade, and establishing a phase synchronization system; under the triggering of the phase synchronization system, performing time-series data acquisition on the measurement point array, and obtaining sparse flow field data; reconstructing the sparse flow field data, and inversely obtaining a flow field database; decomposing the flow field database, extracting a periodic unsteady flow component and a time-averaged flow field component, calculating a turbulent pulsation component from the difference between instantaneous data and the average component, and obtaining a multi-scale flow field feature data set; and extracting and calculating rotor performance parameters, and obtaining an open rotor flow field performance evaluation result.The application improves the accuracy of smooth measurement of the open rotor.

The present invention provides a low relative phase noise optical comb generator device, which stabilizes the repetition frequency of an interference signal of an optical comb by reducing the relative phase noise of driving signals of different frequencies for driving a plurality of optical comb generators in an optical comb range finder. It is provided with: at least three oscillators (13, 13A, 13B) that generate frequency signals whose phases are synchronized with the phase of a reference frequency signal (F REF ) provided by a reference oscillator (11) and whose frequencies are different from each other; and at least two frequency converters (14A, 14B) that are input with a frequency signal obtained by one of the three oscillators (13) and each frequency signal obtained by each of the oscillators (13A, 13B) other than the one oscillator, wherein the at least two frequency converters (14A, 14B) respectively supply, as driving signals, at least two kinds of modulation signals of a sum frequency signal or a difference frequency signal of the frequency signal of the one oscillator and the frequency signal of the other oscillator whose phase noise is smaller than that of the frequency signal of the one oscillator, whose relative phase noise is reduced, to at least two optical comb generators (15A, 15B).

This application discloses a method for dedicated data transmission and synchronization signal sharing in intelligent power cabinets, belonging to the fields of high-power power electronics technology and industrial communication. This method modifies the UART protocol frame structure, expanding the start bit from 1 bit to 3 bits to distinguish between A, B, and C phase synchronization signals or no synchronization trigger, allowing the phase information of the synchronization signal to be directly embedded in the data communication frame. The transmitting FPGA is configured with a dedicated communication status address and data length write address for the MCU to monitor and trigger data transmission, and transmission is initiated on the rising edge of the synchronization signal or by an internal periodic task. After parsing the valid synchronization bit information, the receiving FPGA immediately outputs an interrupt pulse to the MCU of its own cabinet through hardware circuitry, and employs a precise delay forwarding mechanism for the transmitting power cabinet, ensuring that the synchronization interrupt trigger times of the MCUs in each cabinet are aligned at the microsecond level. This method improves the synchronization accuracy, current sharing performance, and system reliability of multi-cabinet parallel systems, and supports dynamic redundancy switching in case of synchronization source failure.

The power conversion device includes: a power conversion circuit connected to a DC power source and a power system, which performs conversion between DC power and AC power; a phase synchronization circuit that outputs a phase command value based on a system AC voltage phase of the power system; and a control circuit that controls the power conversion circuit based on the phase command value from the phase synchronization circuit. The phase synchronization circuit includes: a phase difference calculation section that calculates a phase difference indicating a deviation of the phase command value with respect to the system AC voltage phase of the power system at a predetermined period; a phase difference correction section; and a phase command value generation section that outputs the phase command value based on an output of the phase difference correction section.

The application belongs to the technical field of electro-acoustic conversion equipment, and particularly relates to a replaceable-line high-fidelity noise-reducing in-ear earphone based on a floor iron moving unit, which comprises a 5-unit 4-frequency division hybrid driving module formed by the floor iron moving unit and a micro moving coil unit, and the two achieve signal cooperation through a phase synchronization circuit; full-frequency sound quality optimization and hybrid noise reduction are achieved through the phase synchronization circuit and a DSP+ANC chip, a sound cavity is matched with a shape memory alloy damping adjusting sheet, magnetic attraction and sealing of a 2-pin interface improve durability and sealing performance, a double-mode switching audio line and a three-in-one replaceable plug adapt to multiple devices, and touch control and a selectable Bluetooth kit realize convenient interaction. The application breaks through the sound quality limitation of a single unit through a double-unit cooperative driving structure, realizes dynamic adaptation of noise reduction and sound quality through an adaptive acoustic adjusting system, improves durability and personalized upgrade space through a reinforced replaceable line design, enriches use scenarios through an intelligent interaction module, and meets the multiple needs of high-end users for high-fidelity sound quality, flexible use and intelligent experience.

The application relates to a power transformation box external environment risk intelligent sensing method and system, belonging to the field of power transformation boxes. The method comprises the following steps: obtaining real-time video streams through cameras arranged around a power transformation box, extracting motion entropy and phase synchronization indexes from the real-time video streams; collecting real-time meteorological data, verifying motion characteristics in combination with the motion entropy and the phase synchronization indexes, and outputting consistency indexes and unexplainable motion energy; collecting electrical data, extracting disturbance propagation delays from the electrical data, and calculating electrical topology anomaly indexes; and dynamically generating a geographic fence based on the consistency indexes, the unexplainable motion energy and the electrical topology anomaly indexes, and triggering defense. The application provides an intelligent sensing method based on motion entropy, phase synchronization indexes, meteorological data fusion and electrical topology anomaly detection.

The application discloses an interferometric SAR synchronization method of radar inter-satellite link combined with Ka-band link cross correction, and aims at the problems of interrupting normal SAR imaging or existing initial phase winding in the existing synchronization link method, and proposes a cross correction scheme of X-band radar inter-satellite link combined with Ka-band high-precision synchronization link. The system adopts a common reference source to ensure the phase correlation, and different synchronization time sequences are designed, that is, the X-band link is synchronized at a low frequency to eliminate the initial phase winding, and the Ka-band link is synchronized at a high frequency same as the SAR pulse repetition frequency (PRF) to realize high-precision phase measurement. During ground processing, the initial phase error of the Ka-band compensation function is corrected by using the X-band synchronization data, so that a high-precision phase synchronization compensation function is obtained, and the echo of the secondary satellite is compensated. The application solves the problem of initial phase winding under the premise of not interrupting the normal SAR imaging time sequence, and significantly improves the phase synchronization precision, image quality and absolute height measurement reliability of the dual-satellite interferometric SAR system.

This invention relates to the field of ultrasonic directional propagation technology, specifically to a directional acoustic focusing system based on a U-shaped cavity. The system includes designing the U-shaped cavity, determining its geometric parameters, dimensions, and frequency influences, generating a geometric configuration diagram, configuring the material and angle of the reflective surface accordingly, forming a design scheme, simulating and optimizing the acoustic wave propagation path, adjusting the reflective surface to reduce energy loss and offset, evaluating the energy distribution and accuracy of the focusing area, and finally adjusting the reflective surface based on the evaluation report feedback to correct the focusing offset and generate the final focusing scheme. This invention achieves phase synchronization and energy coupling of multiple reflections through parametric design of the cavity geometry and dynamic analysis of the acoustic wave path. It matches the reflective surface angle and material to construct a stable multi-path focusing mechanism. Through dynamic path correction and energy feedback regulation, it forms a high-precision, balanced focus in the target area, improving the system's focusing stability, energy efficiency, and sound field control capabilities at different frequencies.

This utility model discloses a signal hub board and a grid screen control system for a mesh screen. The signal hub board includes an input interface, multiple output interfaces, and a signal distribution circuit. The input interface receives a drive signal from a receiving card, which includes a master clock signal and multiple parallel data signals. The signal distribution circuit includes a clock buffer module and a data buffer module. The clock buffer module receives the master clock signal and, through buffering and copying, generates multiple output clock signals that are the same number as the number of output interfaces and synchronized with the phase. The data buffer module buffers the multiple parallel data signals one-to-one to generate multiple output data signals. Each output clock signal is paired with its corresponding output data signal and sent to a single mesh screen module through the corresponding output interface. The signal hub board and control system of this application improve signal quality by centrally synchronizing and shaping the drive signals, thereby ensuring that the mesh screen can achieve smooth, clear, and high-quality video playback.

The present application relates to the technical field of vehicle joint control, and discloses a joint control system for vehicle sound and vibration performance coordination under multiple working conditions, comprising a cooperative processing unit, a power source feedback unit, a stiffness execution module and an acoustic intervention module, which are used to obtain phase and energy parameters of power source main excitation and road excitation, generate a phase synchronization reference signal based on energy proportion dynamic anchoring reference sources, make each subsystem execute phase direction signal characteristic alignment, output stiffness adjustment pulses to the stiffness execution module before the arrival of vibration wave peaks according to transmission time delay, and construct an energy discharge channel by changing the physical properties of the bushing; the present application solves the physical superposition problem caused by phase interference between subsystems by establishing a global phase synchronization reference, eliminates the beat frequency phenomenon at the coupling position of the vehicle body, and effectively improves the sound and vibration smooth connection ability during the dynamic switching process of the whole vehicle.

The utility model relates to microstrip circuit technical field discloses a kind of microstrip circuit and radio frequency coding device based on multimode radio frequency coding, including the phase-shift coding unit being connected between quadrature power divider and combiner, phase-shift coding unit includes the absorption modal microstrip line for modal coding, positive modal microstrip line and negative modal microstrip line, the coding modal needed is selected by modal selection switch, wherein, positive modal microstrip line is straight-through microstrip line, output phase is synchronous with input phase, terminal short circuit line is also connected on straight-through microstrip line, two sections are set apart in terminal short circuit line, and it is L type bending structure, the bending section of two L type bending structures is parallel with positive modal microstrip line, and opposite direction is oriented.The utility model can effectively reduce the dispersion effect of straight-through microstrip line in wide frequency band by setting terminal short circuit line on the straight-through microstrip line of positive modal microstrip line, and improve broadband performance.

This invention discloses a precise diagnostic method for coupled faults in wind turbine blades under varying operating conditions, belonging to the field of blade turbine fault diagnosis technology. The invention includes synchronously acquiring and preprocessing strain, pressure, angular acceleration, and operating parameters; achieving signal synchronization and mode decomposition through phase compensation and variational mode decomposition; employing condition-adaptive sparse Bayesian learning to decouple leading-edge corrosion and bolt loosening characteristics; correcting fault coefficients and quantifying severity using pressure data; and then verifying the results using angular acceleration. This invention, by synchronously acquiring blade strain, leading-edge pressure, and generator angular acceleration, and employing cross-domain phase synchronization and condition-adaptive sparse Bayesian learning algorithms, can decouple and quantify the coupled characteristics of leading-edge corrosion and bolt loosening from the aliased signals under varying operating conditions.

The cavity-in and cavity-out light source phase synchronization type laser gyroscope device and control method of the embodiment of the application relates to the technical field of laser gyroscopes, and the laser gyroscope device comprises a laser generating device, a ring resonator device and a beat frequency detection device; the laser generating device is used for generating two independent first laser signals and second laser signals; the ring resonator device comprises a plurality of cavity mirrors, a gain medium and a pump source, the gain medium and the pump source are arranged in the ring resonator, and the gain medium is used for exciting laser to propagate in the ring resonator in the clockwise direction and the counterclockwise direction respectively; the beat frequency detection device is used for detecting the beat frequency of the third laser signal and the fourth laser signal transmitted in the ring resonator device, and determining the rotation angular velocity of the carrier fixedly connected with the laser gyroscope device based on the beat frequency. The embodiment of the application can shorten the stabilization time of the spontaneous laser in the ring resonator, enhance the transmission power and weaken the latching effect, and ensure the continuous detection of the Sagnac frequency.

The application discloses a single-phase and multi-phase constant conduction time DC-DC converter, comprising a source signal generation module, a phase number indication module, a master-slave phase determination module, a PWM generation module, a driving module and a master-slave phase synchronization signal generation module; the input end of the master-slave phase synchronization signal generation module is connected with a signal SYNC; the master-slave phase synchronization signal generation module outputs a signal SET and a signal SYNC_BUF. The signal SET output by the master-slave phase synchronization signal generation module in the application is used as a global control signal of a multi-phase constant conduction time control technology, the signal SYNC and the signal SYNC_BUF are used as synchronization control signals; single-chip separate control can be realized, multi-chip parallel control can be adopted, and multi-phase control technology can be realized in a single-chip multi-phase parallel controller.

This application provides a phase synchronization method, system, device, and medium for a rotary transformer. It involves periodically acquiring sine and cosine signals output by the rotary transformer in response to a loop trigger counter outputting a loop trigger signal. Both the loop trigger signal and the sinusoidal excitation signal used to drive the rotary transformer are generated by converting a synchronization pulse signal output by an RPWM counter. Within each acquisition cycle, the sine and cosine signals are positively zero-crossing detected to obtain a zero-crossing detection result. Based on the zero-crossing detection result, the phase difference between the sine and cosine signals and the sinusoidal excitation signal in the current cycle is determined, and phase synchronization compensation is performed on the sinusoidal excitation signal based on the phase difference. This enhances the signal fidelity and control accuracy of the encoder under strong interference without increasing hardware costs.

The application provides a mental health detection method and system based on heart rate audio fusion, comprising: time sequence alignment of synchronously collected original audio signals and original heart rate signals to obtain an original audio-heart rate signal group, calculation of corresponding emotion correlation scores, cross-modal mutual verification and weighted noise suppression of the original audio-heart rate signal group to obtain a denoised audio-heart rate signal group; parallel feature extraction of the denoised audio-heart rate signal group, emotion mutual information correlation and feature enhancement to obtain an enhanced audio-heart rate feature group; phase synchronization of the enhanced audio-heart rate feature group to obtain a synchronous audio-heart rate feature group, cross-modal fusion based on a reconstructed attention matrix to obtain cross-modal emotion features; construction of a mental health model according to a pre-collected bimodal data set, membership calculation and emotion analysis of the cross-modal emotion features to obtain a detection result.

This invention provides a method and apparatus for measuring the perpendicularity of the end face of a circular cutting tool to the spindle, belonging to the field of geometric accuracy testing technology for precision CNC machine tools. The measuring apparatus includes a non-contact displacement sensor, an angle adjustment platform, a mounting fixture, a signal synchronous acquisition and processing system, an XYZ axis motion mechanism, a precision machine tool body, and a corresponding CNC system. The measurement method employs a three-in-one measurement principle: symmetrical differential error elimination, synchronous spindle phase acquisition, and precise attitude adjustment in confined spaces. This achieves high-precision on-machine measurement of the three-dimensional perpendicularity of the end face of a circular cutting tool to the spindle. This invention enables installation and adaptation in confined spaces on precision machine tools, dual-sensor differential error elimination, precise phase synchronization calculation, and three-dimensional perpendicularity measurement, ensuring the accuracy of measuring the perpendicularity of the end face of a circular cutting tool to the spindle.

This application provides a distributed node phase synchronization method, electronic device, computer-readable storage medium, and program product. The method includes: receiving the output current of a node, a first square wave signal, and a second square wave signal, wherein the phase of the first square wave signal is the same as the phase of the output voltage of a first node, and the phase of the second square wave signal differs from the phase of the output voltage by a preset angle; obtaining the actual power angle of the first node based on the output current, the first square wave signal, and the second square wave signal; calculating the difference between the actual power angle and the target power angle; and adjusting the phase of the output voltage based on the difference when the difference is greater than a preset threshold, until the difference is less than or equal to the preset threshold. This solution can achieve synchronization of voltages at all transmitting and receiving ends, overcoming the limitations of traditional single-path control.

This invention discloses an amplitude and phase consistency calibration system for a high-power combining system, comprising multiple transmit link modules, a power combiner, a main controller, and a host computer. It also discloses a calibration method for amplitude and phase consistency in a high-power combining system. This method sets the voltage standing wave ratio (VSWR) and reflected power of each input port as mandatory safety constraints and embeds them into the optimization algorithm. A calibration strategy is adopted that increases progressively from low power to high power, prioritizing the adjustment of the phase of the channel with the highest reflected power, and finally performing amplitude fine-tuning. This invention is applicable to the high-power radio frequency field, overcoming the major drawbacks of traditional unconstrained phase synchronization algorithms that easily lead to excessive reflected power and damage to core components in multi-channel power combining. While ensuring absolute system safety, it achieves efficient and reliable amplitude and phase calibration in high-channel, high-power combining systems, significantly improving the system's engineering feasibility and reliability.

This phase synchronization circuit (100) has: a sampling phase comparison circuit (110) including a slope voltage generation circuit (112), which generates a slope voltage signal (Vx), and a filter circuit (114), which generates an oscillation control signal (VCONT) on the basis of a slope output current (Icp) corresponding to the slope voltage signal (Vx); an oscillation circuit (VCO) that generates an output clock (Fout) on the basis of the oscillation control signal (VCONT); and a feedback circuit (130) that generates a feedback clock (DIV) on the basis of the output clock (Fout). A slope voltage generation circuit (P01-P0n, P11-P1n, N0, SELP1-SELPn, SELN) includes a first current path capable of controlling whether or not to generate a through current flowing between first and second power supply voltage lines (VDD, VSS) via an output node (Vx) of the slope voltage signal (Vx).　The phase synchronization circuit capable of suppressing fluctuations in PLL gain due to manufacturing variations by evaluating a through current flowing through the first current path and optimizing the slope output current (Icp) flowing through the filter circuit (114) is provided.

This invention relates to the field of analog front-end technology and discloses a multi-channel high common-mode rejection ratio (CMRR) signal acquisition system based on idle-phase common-mode cancellation technology. The system includes: a multi-channel presampler based on a floating dynamic operational amplifier and idle-phase common-mode cancellation technology, used to sample weak input signals. Simultaneously, the output signal is periodically short-circuited during idle phases at the presampler's output to eliminate common-mode signals and improve the CMRR; a multi-channel noise-shaping successive approximation analog-to-digital converter (ADC), which takes the weak signal acquired by the presampler as input and outputs a digital signal; and an ADC that provides a time-division multiplexed clock to drive the presampler, achieving phase-synchronized clock control. The presampler technology based on idle-phase common-mode cancellation proposed in this invention has advantages such as low power consumption and high CMRR, and is suitable for low-gain multi-channel neural signal acquisition systems, effectively eliminating common-mode interference during neural signal acquisition.

The application provides a distributed node phase synchronization method, electronic equipment, a computer readable storage medium and a program product. The method comprises the following steps: receiving an output current of a node, a first square wave signal and a second square wave signal, wherein the phase of the first square wave signal is the same as the phase of an output voltage of a first node, and the phase of the second square wave signal is different from the phase of the output voltage by a preset angle; obtaining an actual power angle of the first node based on the output current, the first square wave signal and the second square wave signal; calculating a difference value between the actual power angle and a target power angle; and when the difference value is greater than a preset threshold, adjusting the phase of the output voltage based on the difference value until the difference value is less than or equal to the preset threshold. The scheme can realize the synchronization of all transmitting end and receiving end voltages, and breaks through the limitation of traditional single path control.

This invention relates to the field of ultrasonic array driving and control technology, and discloses a multi-channel array ultrasonic phase synchronization control system based on FPGA. The system includes a host computer parameter configuration module, a communication interface module, a parameter receiving and parsing module, a parameter latching and synchronization update module, a multi-channel delay phase control module, a Burst excitation output module, and a transducer drive output interface module. The host computer generates delay parameters, channel enable parameters, and excitation parameters for each channel and sends them to the FPGA. The FPGA receives and parses the parameters and writes them into a buffer register group. At a preset update time, these parameters are uniformly loaded into the working register group, ensuring that the parameters of each channel take effect synchronously. Each channel outputs an excitation signal according to the corresponding delay parameters under a unified clock reference, and the Burst control forms a multi-channel pulse train output to drive the array ultrasonic transducer to emit ultrasonic waves according to a predetermined phase relationship.

This invention provides a distributed radar noncoherent direct localization method, device, terminal, and medium for data anomaly scenarios, relating to the field of radar technology. The method includes: acquiring echo signal data received by each observation array; constructing a signal model characterizing the mapping relationship between the echo signal data and potential source locations, where the common detection area of ​​each observation array is a two-dimensional grid, the grid point coordinates correspond to the potential source locations, the signal model does not contain phase synchronization parameters between observation arrays, and is adapted to the noncoherent characteristics of the signal data; and constructing a system based on the signal model... 2,1 This invention addresses the group sparse optimization problem of norms. A pre-defined optimization algorithm is used to solve the problem, yielding a row sparse matrix. Based on this matrix, the true source localization result is determined, and the column vector elements of the row sparse matrix correspond to the potential source reflection energy estimation results at the grid points. This invention utilizes echo signal data from various observation arrays to achieve primary localization, eliminating secondary localization errors and reducing abnormal noise interference.