49results about How to "High synchronization accuracy" patented technology

This application relates to an interrupt generation device with synchronization function. By using one of the interrupt generation modules as a reference interrupt module, when the synchronization signal output by the synchronization output module arrives, the reference timing module adjusts the count of each interrupt module according to the synchronization signal, the reference count of the reference interrupt module, and the timing duration of the reference timing module itself, so as to change the output time of each subsequent interrupt signal. This makes the output reference interrupt signal synchronized with the synchronization signal, and other interrupt signals still maintain the initial phase relationship with the reference interrupt signal before adjustment, and eventually synchronize with the synchronization signal. In this way, only one synchronization signal is needed to ensure that the synchronization of all interrupt signals is achieved without changing the phase relationship between the interrupt signals of each interrupt generation module. The method is simple and has high synchronization accuracy.

The invention discloses an interference communication integrated waveform generation method based on spectrum dispersion-multi-system phase shift keying. The problems of difficult communication information demodulation and high hardware implementation complexity in interference communication integration research are mainly solved. According to the scheme of the invention, the SMSP interference signal is formed by periodically expanding the chirp signal on the time domain, the communication information is modulated on the phase of the chirp signal, and the plurality of chirp signals carrying the communication information can cause dense false target interference at random positions on the radar, so that the interference and communication integrated signal is generated. At a communication receiving end, a first linear frequency modulation signal is adopted to perform carrier synchronization, so that the synchronization effect can be improved by using the high time width-bandwidth product characteristic of the linear frequency modulation signal, and communication information can be demodulated directly by using a coherent demodulation mode; at a radar receiving end, the signal can generate a radar interference effect with dense false target characteristics.

The invention discloses double-spindle numerical control turning and milling combined machining equipment, and belongs to the technical field of numerical control milling machines, the double-spindle numerical control turning and milling combined machining equipment comprises a machine body, a driving mechanism is arranged at the upper end of a rack, the driving mechanism comprises a first movable seat, an insertion hole is formed in the first movable seat, and a synchronous connecting mechanism is slidably connected to the driving mechanism; the synchronous connecting mechanism comprises a second movable seat, a second electric push rod is installed at the upper end of the second movable seat, the output end of the second electric push rod is inserted into the inserting hole, and a first motor and a second motor are installed on the first movable seat and the second movable seat respectively. By arranging the synchronous connecting mechanism, synchronous movement of the second motor and the first motor can be achieved, meanwhile, the end and the outer surface of a workpiece are milled, the synchronous precision is high, the working efficiency is improved, after end machining is completed, linkage can be quickly relieved, independent operation of a single shaft is achieved, and the flexibility of equipment is enhanced.

The invention belongs to the field of electro-hydraulic system motion control, and discloses a fixed time optimal synchronous control method for an aero-engine electro-hydraulic actuating mechanism. Constructing a double-cylinder hydraulic system dynamic model, and defining a tracking error and a synchronous coupling error; designing an optimal synchronous controller based on a reinforcement learning actor-commentator architecture, and introducing a fixed time convergence mechanism; and a self-adaptive robust compensation item of the enhanced neural network is designed, and unmodeled dynamics and disturbance are inhibited. According to the method, Lyapunov stability analysis proves that the fixed time stability is met, and comparison experiment verification is carried out on an aero-engine hardware-in-the-loop experiment platform. The method solves the problems that in traditional synchronous control, convergence time depends on initial conditions and is sensitive to uncertainty, and a nonlinear HJB equation is difficult to solve, high-precision synchronous motion control within fixed time is achieved, and the method is suitable for an aero-engine electro-hydraulic execution system with the high reliability requirement.

This invention discloses a high-precision clock synchronization method between two wireless devices, comprising: Initially, a first wireless device sends a first message containing a transmission timestamp to a second wireless device. Upon receiving the message, the second wireless device overwrites its local reception timestamp with this first message, completing initial clock alignment. Subsequently, after a turnaround time, the second wireless device returns a second message to the first wireless device and calculates the one-way time of flight based on the time interval and turnaround time. At the next predefined superframe moment, the first wireless device sends a third message. The second wireless device calculates and corrects its local clock frequency offset based on this message and the timestamp of the previous message, while simultaneously correcting the local reception timestamp of the third message using the one-way time of flight. Thereafter, the above message exchange and calculation process is repeated at each superframe moment to continuously maintain high-precision synchronization. This invention fundamentally improves the clock synchronization accuracy between wireless devices.

The invention discloses a satellite optical communication blind frequency offset estimation method, device and equipment based on extended phase difference, and a storage medium, and relates to the technical field of signal processing, and the method comprises the steps: obtaining an analog digital signal after digital-to-analog conversion during photoelectric detection; performing phase difference calculation and expansion processing according to the analog digital signal to obtain a phase difference sequence; performing anomaly detection and interpolation reconstruction according to the phase difference sequence to obtain a reconstructed phase difference sequence; and calculating an instantaneous frequency offset according to the reconstructed phase difference sequence, and carrying out noise smoothing processing on the instantaneous frequency offset to obtain a smoothed frequency offset estimation value. According to the invention, abnormal point detection and elimination are carried out on the phase difference sequence of the received signal, and the interpolation algorithm is utilized to reconstruct the continuous phase change track, so that the synchronization precision and link stability of the satellite optical communication system in a large-frequency-offset and high-dynamic scene are improved.

The application relates to a kind of moving base star sensor and high-precision time synchronization method of inertial navigation, and is mainly related to the technical field of integrated navigation, and the main steps include: real-time acquisition of the motion parameter data output by IMU;Using second-order extrapolation algorithm, based on IMU historical data, the equivalent IMU data corresponding to the star sensor data update time is calculated, the output frequency difference is adapted;Through asynchronous Kalman filtering algorithm, combined with IMU data and star sensor measured data, time update and measurement update are completed, and dynamic error is inhibited;Using high-precision crystal oscillator to optimize the clock source of inertial navigation system, the inherent error of clock output is reduced;Through multi-link cooperation, the time delay error of star sensor is compensated;Using FPGA interrupt latch, time alignment at the hardware level of star and inertial is realized.The method can effectively solve the time asynchronous problem of star sensor and inertial navigation data in the online calibration stage during flight, and guarantee the navigation accuracy and stability of integrated navigation system.

The application provides a multi-modal sensor time synchronization method for road monitoring, comprising: acquiring sensor data for target road detection, and determining a communication time delay; according to actual network conditions and environmental changes, optimizing a compensation value in real time to obtain an optimized data set; based on the complete optimized data set, determining a network topology structure; according to the optimized network topology structure, determining a time synchronization signal sequence of relative time delay information of each node in the network; and optimizing time synchronization of all sensors for target road detection. The application introduces a dynamic environment modeling and adaptive network topology optimization strategy, effectively overcomes the shortcomings of traditional time synchronization technology, and can realize high-precision multi-modal data time synchronization in a complex dynamic environment.

The ultrahigh-pressure multi-point synchronous action hydraulic system comprises a servo motor, an ultrahigh-pressure plunger pump, an ultrahigh-pressure electromagnetic switch valve, an ultrahigh-pressure safety valve, N control valve sets and N oil cylinders, and N is larger than or equal to 2; the servo motor drives the ultrahigh pressure plunger pump to provide a pressure oil source, and the N control valve sets can independently control lifting and pressure maintaining of the corresponding oil cylinders. And an oil return throttling speed regulation loop is formed by adjusting the opening degree of the proportional throttling valve in each control valve group, so that synchronous displacement control is realized. Two ports of the proportional throttle valve are connected with the one-way valve and the hydraulic control one-way valve, ultrahigh-pressure oil is separated from the proportional throttle valve, the proportional throttle valve works in an oil cylinder low-pressure oil return loop, an ultrahigh-pressure proportional valve does not need to be arranged, frequent switching of a switching valve in the synchronous action process is avoided, and the advantages of being stable in synchronization and high in precision are achieved. After the synchronous action system is reset, the hydraulic one-way valve and the one-way valve can achieve the pressure maintaining function of the oil cylinder high-pressure cavity.

The application belongs to the technical field of wireless positioning and specifically relates to a reconfigurable intelligent surface assisted SISO system user near field positioning method. Regular multivariate decomposition and orthogonal matching pursuit are combined to obtain initial values of TOA and AOD on the RIS, then, a l1-norm regularization method based on sparsity is used to estimate the distance. Then, the maximum likelihood estimation formula is used to refine the initial estimation. Finally, the extended invariance principle is combined with the least square method to recover the position and clock offset. The obtained parameter estimation performance is close to the Cramer-Rao lower bound of the estimation error.

This utility model discloses a force transmission mechanism for anti-slippage tie rods on railway arrival and departure lines, including a square box, force transmission rods, a power pull plate, and a force transmission hinge mechanism. The square box contains a first inner limiting slide rail and a second inner limiting slide rail that are perpendicularly connected to each other. The power pull plate is disposed through the second inner limiting slide rail. The force transmission rods are respectively disposed in the first inner limiting slide rails on both sides of the power pull plate. The two force transmission rods in the first inner limiting slide rails are connected to the power pull plate via the force transmission hinge mechanism. By driving the power pull plate to reciprocate in the second inner limiting slide rails, the force transmission hinge mechanism drives the two force transmission rods to reciprocate in the first inner limiting slide rails. This utility model's anti-slippage tie rod force transmission mechanism ensures that the linear input of the power pull plate is accurately converted into the equidistant reverse output of the two force transmission rods, thereby greatly improving the synchronization accuracy of the rail clamping action, eliminating the risk of unilateral clamping failure, and preventing slippage accidents.

This invention discloses a production equipment and method for suspended wire clamps with uniform gripping force, belonging to the field of wire clamp manufacturing technology. The production equipment for suspended wire clamps with uniform gripping force includes a U-shaped frame, and further includes: a conveying unit, which has two sets and is respectively arranged on both sides of the U-shaped frame; a drilling unit, which is movable on the upper side of the U-shaped frame, and includes a positioning component for positioning the hull and a first drilling component and a second drilling component for drilling holes on the bottom and sides of the hull; and a reciprocating conveying mechanism, which is arranged on one side of the U-shaped frame and is used to convey the drilling unit and move it back and forth along the length of the U-shaped frame. This invention, by setting multiple independently moving drilling units in a circular motion, achieves tracking and following processing of the hull workpiece on a continuous conveyor line, solving the problem of production line downtime, and realizing efficient continuous processing of suspended wire clamp hulls while ensuring hole position accuracy.

The application discloses a multi-output low-frequency picosecond mode-locked fiber laser based on a cascade contrast differential beam splitter, which comprises a fiber grating, a gain fiber, a cascade light splitting network, a saturable absorber and a pump coupler for injecting pump light into the gain fiber; the fiber grating, the gain fiber, the cascade light splitting network and the saturable absorber are sequentially connected and constitute a linear resonant cavity with a target set length, and the fiber grating in the linear resonant cavity is connected with the pump coupler to build a linear cavity fiber laser; the length of the entire linear cavity fiber laser can be controlled by controlling the target set length of the linear resonant cavity composed of the fiber grating, the gain fiber, the cascade light splitting network and the saturable absorber, so that the volume of the linear cavity fiber laser is smaller, and meanwhile, after the target set length of the linear resonant cavity is controlled, low repetition frequency can be realized directly in a fundamental mode without complex harmonic mode-locking control.

The invention belongs to the technical field of holographic display and precise synchronization, and discloses a PTP and radio frequency fusion synchronization method for holographic sand table double-main-view-angle three-dimensional display, which is suitable for multi-user collaborative decision-making scenes such as smart city management and control, emergency rescue collaboration and the like. The method is characterized in that a nanosecond-level unified reference clock is generated through Beidou / GPS, so that a sand table radio frequency transceiver and a display screen are aligned in time sequence; the radio frequency end transmits a synchronizing signal with a PTP timestamp, a visual angle ID and an MAC identifier and opening and closing parameters to the glasses through 2.4 GHz self-adaptive frequency hopping and SM4 encryption; a PTP slave clock is arranged in the glasses to compensate transmission time delay, a time sequence is automatically generated to control an LCD shutter, accurate control smaller than or equal to 300 ms can be maintained when signals are lost, and seamless reconnection is achieved after recovery. According to the method, the synchronization precision reaches a sub-microsecond level, multi-view expansion and multi-sand table cooperation are supported, and the problems of crosstalk, weak interference resistance and the like of a traditional scheme are solved.

The present application relates to rotary excavator control method technical field, especially in kind for rotary excavator multi-cylinder synchronous PID control method and system, the method includes S1, hardware foundation, S2, inner and outer ring PID control, S3, work mode judgment, S4, normal synchronous mode, S5, blocked follow mode, S6, fault protection mode, the present application is under normal synchronous mode condition, according to displacement outer ring control generates the actual basis speed of each oil cylinder independence and increases cross coupling speed compensation mechanism, improves the synchronization accuracy between multi-cylinder, realizes the horizontal synchronous displacement of multi-cylinder, when the blocked situation appears to certain oil cylinder, limit the remaining oil cylinder to follow in the vicinity of the blocked cylinder, avoid structural deformation and mechanical hard top, when oil cylinder appears serious anomaly, the system turns into fault protection mode, to oil cylinder speed zero and outputs fault alarm and stop interlock, realizes equipment safety protection.

This application relates to a real-time network synchronization communication system, belonging to the technical field of computer network communication. The system comprises four core modules: a hardware optical I / O synchronization module, integrating a multi-wavelength optical transceiver array and anti-jitter circuitry, providing a nanosecond-level global clock signal with a synchronization accuracy ≤15ns; a timing orchestration module, based on time-sensitive networking, dividing fixed time windows and dynamic buffer windows, supporting the priority preemption mechanism of the SRIO bus to achieve deterministic data transmission; distributed RTDATA nodes, replacing traditional single-board computers, integrating heterogeneous computing units and intelligent storage controllers, reducing protocol stack processing latency through zero-copy technology; and a dynamic multicast routing system, constructing secure and isolated multicast trees on demand, and optimizing link load distribution using machine learning. This application solves the problem of decreased real-time performance caused by multi-node communication concurrency through the collaborative design of hardware optical synchronization and dynamic data orchestration.

The invention discloses a large-size beam hoisting closed-loop control method and system for crossing an in-service multi-strand track, and relates to the technical field of bridge construction control. The method comprises the following steps: acquiring and synchronizing beam body reaction force, displacement, inclination angle and train approaching / enveloping data; calculating a barycentric coordinate G and an attitude deviation vector E; identifying a flexibility matrix H (k) on line; generating multiple constraints including counter force, deflection, synchronization error and the like, and a linkage tightening threshold value when the train approaches; robust MPC is adopted to solve the correction amount with minimization of the maximum reaction force change as a main target; synchronously executing and adopting double closed-loop control; switching and re-optimizing the active set when the soft constraint is triggered; and the stability is judged according to quantitative indexes such as G and E dual-threshold duration time. According to the method, operation scene linkage constraint, peak counter-force suppression and multi-target cooperative control are achieved, and the safety and precision of non-stop hoisting of the in-service track are improved.

The invention discloses an electronic detonator detonation control method and system, and belongs to the technical field of electronic detonator detonation control. The electronic detonator detonation control method comprises the following steps: calibrating a local clock of an electronic detonator detonation control host, and calibrating local clocks of a plurality of electronic detonator detonation control slaves; an electronic detonator detonating control host sends a detonating control instruction and a preset detonating control instruction execution starting time to a plurality of electronic detonator detonating control slaves, and the plurality of electronic detonator detonating control slaves receive the detonating control instruction sent by the electronic detonator detonating control host and the preset detonating control instruction execution starting time. And when the time reaches the preset initiation control instruction execution starting time, the plurality of electronic detonator initiation control slaves synchronously start to execute the initiation control instruction according to the preset initiation control instruction execution starting time. The detonation control method disclosed by the invention is beneficial to improving the synchronization precision of the plurality of slaves for synchronously starting to execute detonation control.

This invention provides a laser tube cutting chuck, comprising a front cover, four grippers, two sets of drive devices (two sets in each set) for correspondingly driving the movement of the four grippers, a rear cover, a connecting seat for fixing the front and rear covers together, a frame, a rotary drive mechanism mounted on the frame for driving the rotation of the four grippers, and two sets of rack and pinion synchronization mechanisms fixedly mounted at the rear end of the front cover for rigidly constraining the motion synchronization of the two sets of drive devices in the same set of the two sets of drive devices. The synchronization mechanism includes two synchronous drive racks fixedly connected to the two sets of drive devices in the same set, two synchronous gears rotatably mounted on the front cover and correspondingly meshing with the two synchronous drive racks, and synchronous connectors at both ends meshing with the two synchronous gears. This chuck enables precise synchronization during the movement of the two sets of grippers (up / down and left / right), and the drive devices and synchronization mechanisms operate smoothly without interference, ensuring reliable operation.

The utility model discloses a chip mounter belt type bulk material feeder, comprising a housing, an annular chain belt and a magnetic block, the housing is provided with a material taking port, the annular chain belt is rotatably arranged in the housing, the annular chain belt is provided with a plurality of material level grooves and a plurality of baffle plates, the interval between the adjacent baffle plates is equal to the interval between the adjacent material level grooves, and the magnetic block is arranged in the material taking port. The magnetic block is arranged on the shell in a reciprocating sliding mode through an elastic structure, the magnetic face of the magnetic block is arranged close to the material taking opening, the magnetic block is driven by matching blocks with different magnetisms on the material taking head in the direction away from the material taking opening, the magnetic block is connected with a one-way rotating shifting piece, and the one-way rotating shifting piece extends downwards to be movably connected with the baffle. According to the utility model, the one-way rotating plectrum is driven by the dynamic matching of magnetic repulsion of the magnetic block and the matching block on the material taking head and the elastic return of the return spring, so that the feeding response speed is higher, and the dynamic error accumulation is smaller.

A high-precision time synchronization method for a star sensor and inertial navigation under a moving base relates to the technical field of integrated navigation, and mainly comprises the following steps: acquiring motion parameter data output by an IMU (inertial measurement unit) in real time; a second-order extrapolation algorithm is adopted, equivalent IMU data corresponding to the star sensor data updating moment is calculated based on IMU historical data, and adaptation of output frequency differences is achieved; time updating and measurement updating are completed through an asynchronous Kalman filtering algorithm in combination with IMU data and measured data of the star sensor, and dynamic errors are inhibited; a clock source of the inertial navigation system is optimized by adopting a high-precision crystal oscillator, and inherent errors of clock output are reduced; the time delay error of the star sensor is compensated through multi-link cooperation; and the FPGA is used for interrupting latch, so that time alignment of a satellite inertial hardware level is realized. The method can effectively solve the problem of time asynchronization of the star sensor and inertial navigation data in the online calibration stage in the flight process, and ensures the navigation precision and stability of the integrated navigation system.

The application discloses a jacquard array multi-way switch high-frequency cooperative control method and belongs to the technical field of automatic control, which comprises the following steps: digitally analyzing a preset weaving pattern program to obtain multi-way switch array channel control timing data, needle lifting action logic table and region division code, synchronously collecting control channel number, transmission mechanism angle, running speed and load current; generating initial switch control instructions based on the analysis result and the channel number, outputting partition synchronous digital trigger instructions through partition caching and FIFO queue scheduling, realizing dynamic feedforward compensation through angle deviation and running speed, combining load current deviation to perform amplitude compensation through a positional PID algorithm, obtaining digital optimization driving signals, converting the digital optimization driving signals into driving voltage to control multi-way switch contacts to perform needle lifting actions, and performing real-time dynamic updating according to feedback parameters; and the application improves multi-way switch cooperative control precision and response speed and enhances equipment running stability.

The synchronous angle opening and closing mechanism of the surgical robot comprises a kneading rod seat, a kneading rod is fixedly connected to the kneading rod seat, two opening and closing shafts are fixed to the end, away from the kneading rod seat, of the kneading rod at intervals, the two opening and closing shafts are marked as the first opening and closing shaft and the second opening and closing shaft respectively, and the first opening and closing shaft and the second opening and closing shaft are arranged in parallel. A first opening and closing petal unit is hinged to the first opening and closing shaft, a second opening and closing petal unit is hinged to the second opening and closing shaft, the first opening and closing petal unit comprises a first opening and closing petal and a first synchronous gear, the first opening and closing petal and the first synchronous gear keep rotating synchronously, and the second opening and closing petal unit comprises a second opening and closing petal and a second synchronous gear. And the second opening and closing flap and the second synchronous gear keep rotating synchronously, and the first synchronous gear and the second synchronous gear are meshed to achieve synchronous opening and closing of the first opening and closing flap and the second opening and closing flap. The synchronous angle opening and closing mechanism of the surgical robot can improve the synchronization precision when the two opening and closing flaps act.

A double-tube single-head demolding mold structure includes a fixed mold core, a template, a slider, gears, arc-shaped core pullers, a middle core puller, and inclined guide pillars. The slider slides parallel to the parting surface on the fixed mold core, which has a first inclined guide pillar hole and two racks fixed thereon. Two gears are rotatably mounted on the fixed mold core and mesh with corresponding racks. Two arc-shaped core pullers are rotatably mounted on the fixed mold core, each having an arc-shaped tooth segment that meshes with a corresponding gear. The middle core puller slides on the slider and is located between the two arc-shaped core pullers, with a second inclined guide pillar hole that partially overlaps with the first inclined guide pillar hole. The inclined guide pillars are mounted on the template and pass through the two inclined guide pillar holes. The template drives the inclined guide pillars to first push the middle core puller outwards independently, then drives the slider to move outwards synchronously with the middle core puller. The slider drives the gears to rotate via the racks, causing the arc-shaped core pullers to unscrew. No additional power source is required, simplifying the structure, reducing costs and maintenance, preventing interference from the double arc-shaped core pullers, adapting to double-reverse arc-shaped groove molding, and improving product accuracy and efficiency.

The invention relates to the technical field of three-phase data synchronization, and particularly discloses a wireless-based three-phase data synchronization method in a transformer substation, which comprises the following steps of: establishing an independent synchronous arbitration terminal and a plurality of distributed data acquisition units, broadcasting a synchronous beacon carrying a high-precision main timestamp by the synchronous arbitration terminal, after each data acquisition unit receives the synchronous beacon, a frequency drift model of a local real-time clock relative to a main clock is established, and an accurate drift coefficient is calculated. Based on the drift coefficient, the data acquisition unit adopts a digital differential comprehensive algorithm to perform periodic fine adjustment on a counter heavy load value of the local real-time clock. And meanwhile, the data acquisition unit binds the sampling data with a sampling point position identifier at a synchronous beacon receiving moment, and the data fusion unit performs final sample alignment on a data stream from three phases according to the position identifier, so that dual high-precision synchronization of physical layer frequency synchronization and data layer phase alignment is realized.

This application discloses a wireless communication system and method based on an EtherCAT network. The system includes a wireless gateway and wireless slave stations. The wireless gateway includes an EtherCAT slave module, a wireless communication module, a control module, and an auxiliary function module. The control module encapsulates and converts EtherCAT frames received by the EtherCAT slave module with wireless frames from the wireless communication module through hardware-level protocol conversion. The wireless communication module uses either an FHSS module or a WiFi module. The auxiliary function module includes a timestamp module that records time information to assist the control module in using a multi-level distributed clock synchronization optimization algorithm for master-slave clock synchronization. The wireless slave station includes an EtherCAT slave module compatible with the wireless gateway that receives EtherCAT master station control commands, a wireless communication module of the same model that uploads wireless frames encapsulated with EtherCAT sub-messages, and a local control unit that parses EtherCAT master station control commands to collect local data and encapsulates it into EtherCAT sub-messages. This application can adapt to the requirements of industrial automation for high-precision and high-reliability wireless communication.

The utility model relates to the technical field of nuclear radiation, in particular to a neutron angle correlation distribution information acquisition system, which comprises a neutron detector, a time position sensitive detector module, a time flight measurement module, a synchronous trigger control module, a signal processing module, a data acquisition module and a spherical support frame, the system adopts a structure in which multiple neutron detectors are uniformly distributed, is combined with a time position sensitive detector module and a time flight measurement module, is distributed on a spherical framework, and can collect neutron angle correlation distribution in a 4pi space angle, including neutron energy, time and angle; and angle distribution, time difference distribution, energy association, event counting and direction association information are obtained, and data information support is provided for radionuclide identification.

This invention discloses a dual-screen interactive drawing touch operation synchronous display system, comprising: a dedicated auxiliary touch terminal for collecting user touch operation commands; a low-latency dual-mode transmission module connecting the dedicated auxiliary touch terminal and a main display device for transmitting the touch operation commands and synchronization data between the two; and a synchronous display control module connected to the main display device for receiving commands transmitted by the low-latency dual-mode transmission module and controlling the main display device to perform synchronous rendering and display. This system can be widely applied in professional fields such as engineering design review and medical imaging consultation, significantly improving operational efficiency and collaborative flexibility.

This invention proposes a large-scale array acoustic tweezers control device and method, relating to the field of ultrasonic technology. It includes: a host computer and an ultrasonic control system; the host computer is communicatively connected to the ultrasonic control system for sending control data to the ultrasonic control system; the ultrasonic control system includes: an interactive circuit board, a control circuit board, and ultrasonic transducers; the ultrasonic transducers are arranged in multiple ultrasonic transducer arrays, forming a control space; the interactive circuit board distributes control data to the ultrasonic control board, which controls the ultrasonic transducers to emit ultrasonic waves, synthesizing a preset sound field within the control space to control the position of the target object, achieving precise control of the ultrasonic transducers, capturing and manipulating the target object, with high synchronization accuracy between signal channels, a large number of controlled transducer array elements, and support for adjusting the frequency, phase, and amplitude of the driving waveform of a single array element. The array can be arranged into a planar array or other shapes to meet different experimental needs.

The application provides a method for compensating dispersion asymmetry in optical fiber time-frequency transmission and related equipment; the method comprises the following steps: dividing a first clock pulse signal into a second electrical signal of a first electrical signal at a local end; converting the first electrical signal into a first optical signal and sending the first optical signal to a remote end; receiving a second optical signal and converting the second optical signal into an electrical signal, determining a first time interval by using the converted electrical signal and sending the first time interval to the remote end; generating a dispersion measurement optical signal and sending the dispersion measurement optical signal to the remote end. Dividing a second clock pulse signal into a third electrical signal and a fourth electrical signal at the remote end; converting the third electrical signal into a second optical signal and sending the second optical signal to the local end; receiving the dispersion measurement optical signal from the local end and measuring a dispersion parameter according to the dispersion measurement optical signal, receiving the first optical signal of the local end and converting the first optical signal into an electrical signal; determining a second time interval by using the converted electrical signal and the fourth electrical signal, determining a delay difference between the first time interval and the second time interval, and correcting the second clock pulse signal according to the delay difference and the dispersion parameter.