731 results about "Ultra high speed" patented technology

The invention relates to a retiming circuit applied to an ultra-high-speed and high-precision DAC (Digital-to-Analog Converter), which comprises an alignment module, a cross point adjusting module, a coding module, a phase detection module and a digital module, the coding module is connected with the alignment module, the phase detection module is connected with the cross point adjusting module and the coding module, and the digital module is connected with the phase detection module and the alignment module. According to the circuit structure provided by the invention, the sampling clock can be accurately aligned to the center of a data eye pattern, so that the delay difference between a clock tree and a data path caused by process deviation and the like is effectively reduced, the high-frequency spurious suppression performance is improved by eliminating nonlinear distortion caused by time sequence errors, the SFDR is greatly improved, and compared with a traditional scheme, the SNR is effectively improved.

The invention relates to the technical field of automatic control, and discloses a pressure closed-loop self-calibration method for an ultrahigh-speed jet injection process, and the method comprises the steps: initializing a system, and building a pressure and temperature combined compensation model; a high-precision sensor is used for collecting real-time pressure and temperature data; by calculating a pressure deviation intelligent switching control strategy, PID is combined with feed-forward compensation in a steady state, and a deep reinforcement learning algorithm is switched to realize quick response in a transient state; automatically triggering closed-loop self-calibration according to operation time or a deviation threshold value, executing zero point and full scale calibration and updating compensation parameters; and carrying out residual analysis by using a digital twinborn model to realize fault diagnosis and early warning. According to the invention, the problems of low control precision and poor long-term stability of an ultra-high-speed jet flow process under nonlinear and large-lag working conditions are solved, and high-precision stable control and system self-adaptive calibration under a wide speed range are realized.

The invention discloses a switch secure communication encryption method based on quantum key distribution. The method comprises the following steps: a service party submits a'security-delay-bandwidth 'intention to a zero-trust brain through a quantum policy intention description language; evaluating the real-time quality, key margin and topology accessibility of an optical fiber quantum channel, a classical ultra-high-speed channel and a radio frequency space channel according to intention requirements; triggering a QKD transmitting end and a receiving end to perform quantum state transmission of polarization and OAM coding along the optimal quantum path, completing basis vector comparison, error code verification and privacy amplification, generating a root quantum key, and injecting the root quantum key into an on-chip quantum memory; when a data packet arrives at a switch port, the assembly line takes out Kroot from the first-level key pool, and derives a one-time session key through the HMAC-SHA3; continuously monitoring a quantum channel bit error rate, a key pool margin and an AI abnormal score; and the transmitting and receiving parties synchronously confirm and destroy the session key, write all key life cycle events into a quantum invariant account book, and realize second-level auditing evidence obtaining through block chain hash anchoring.

The invention relates to the field of building material preparation, in particular to a high-strength concrete material and a preparation method thereof.According to the high-strength concrete material, through the synergistic effect of core-shell type temperature-sensitive resin particles, a pH response type expanding agent and industrial solid waste composite micro powder, multi-environment self-adaptive crack resistance and mechanical property breakthrough are achieved. The core component is prepared from 180 to 240 parts of cement, industrial solid waste composite micro powder (30 to 50 parts of fly ash-based nano SiO2 and 50 to 70 parts of steel slag micro powder), 10 to 15 parts of core-shell resin particles and 8 to 12 parts of pH response type expanding agent. According to the preparation process, multi-section intelligent stirring (ultra-high-speed shearing and dispersing of the nanometer material) and dynamic maintenance of the internet of things are adopted, the hydration process is precisely regulated and controlled, and the finally prepared material has excellent compressive strength and anti-cracking performance. The method is suitable for severe scenes such as ocean engineering and plateau buildings, and has wide application prospects.

The invention discloses an ultra-high-speed three-dimensional laser scanning pavement skid resistance evaluation method and system, and the method comprises the steps: scanning a target pavement through a three-dimensional laser scanner, obtaining the three-dimensional point cloud original data of the pavement, carrying out the preprocessing of the three-dimensional point cloud original data of the pavement, and carrying out the calculation of the three-dimensional point cloud original data of the pavement; constructing a road surface three-dimensional texture model according to the preprocessed road surface three-dimensional point cloud data, constructing a reference surface of a target road surface, projecting the reference surface into the road surface three-dimensional texture model, extracting a plurality of feature parameters related to the anti-skid performance of the road surface based on the projected road surface three-dimensional texture model, and calculating the anti-skid performance of the road surface according to the extracted feature parameters. According to the method, the weights of the extracted multiple characteristic parameters related to the anti-skid performance of the road surface are determined, the multiple characteristic parameters are subjected to weighting processing, and the environment penalty factor is introduced to correct the weighting processing result to obtain the anti-skid performance index, so that the anti-skid performance of the target road surface is evaluated by using the anti-skid performance index, and the evaluation accuracy of the anti-skid performance of the target road surface is improved. Therefore, the evaluation accuracy and evaluation efficiency of the anti-skid performance of the road surface are improved.

The invention discloses an ultra-high-speed imaging device based on acousto-optic filtering modulation. The ultra-high-speed imaging device comprises a spectrum modulation system, a spectrum imaging system and a data processing system. The spectrum modulation system utilizes an acousto-optic tunable filter (AOTF) to dynamically modulate broadband continuous spectrum light, narrow-band illumination light which rapidly changes along with time is generated, and time information of a dynamic scene is effectively mapped to a spectrum dimension. And the spectral imaging system images the spectral coded dynamic scene to the hyperspectral camera to realize acquisition of spectral space-time information. The data processing system performs spectral crosstalk correction, channel separation and demosaicing reconstruction on the acquired original mosaic image, and recovers a time sequence image according to a spectrum-time mapping relation, thereby realizing single-shot superspeed imaging in a dynamic process. The device has the advantages of being simple and compact in structure, flexible in time window, high in imaging fidelity and the like, and has wide application prospects in the fields of rapid dynamics such as microfluidics, laser processing and ultrafast physics.

The invention relates to an FPGA-based GPR ground penetrating radar electromagnetic signal synchronous high-speed data acquisition system and method. The system comprises a front-end signal processing module, a high-speed ADC sampling module, a clock synchronization control module, an FPGA real-time processing module, a target detection and feature extraction module, a mechanism data storage module and a remote data transmission module. On the engineering safety level, the service life of equipment in a strong electromagnetic environment is prolonged by three times through the multi-stage protection design, and the annual failure rate is reduced to 0.1% or below; an ultra-high-speed sampling system (83.2 GS / s) is combined with femtosecond-level clock synchronization, so that 0.5 mm-level thin-layer structure recognition becomes possible, and a technical foundation is provided for geological disaster early warning; a pioneering photoelectric double-channel transmission mechanism is adopted, the electromagnetic interference suppression is improved by 12dB while the 1ps synchronization precision is kept, and the traditional contradiction between high-speed sampling and signal fidelity is broken.

The invention discloses a full-localization ultra-high-speed multi-channel ADC (Analog to Digital Converter) acquisition and processing platform, and relates to the technical field of signal processing. The platform comprises a high-stability clock distribution calibration module, a synchronous acquisition and pulse injection module, a pulse detection and integer deviation module, a coarse-grained translation alignment module, a sub-sampling phase extraction module, a fractional delay interpolation alignment module, a hierarchical storage and flow control module and a high-speed interface synchronous output module. Multi-channel sampling clock synchronization is realized through FPGA dynamic phase adjustment; performing coarse-grained translation by injecting calibration pulses to detect integer deviation, extracting a sub-sampling phase difference, and adopting fractional delay filtering to realize sub-sampling precision alignment; hierarchical storage and intelligent flow control are carried out according to priorities, and synchronous data flow is output through a domestic high-speed interface; through a full-flow domestic chip and a synchronous correction technology, sub-sampling precision alignment and hierarchical flow control output of a multi-channel ADC at an ultrahigh sampling rate are realized.

The invention provides a high-density ultra-high-speed bus expansion electric connector, which comprises an insulating body provided with a lengthwise slot, two sides of the slot are provided with a plurality of terminal slots, and a fool-proof part is arranged in the slot and is used for dividing the insulating body into a power supply and low-speed signal area and a high-speed signal area; the terminals comprise differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal area, every two differential signal terminals are adjacent, and every two adjacent differential signal terminals and an insulating block inserted into the insulating body are formed in an embedded mode; the other terminals are all independent terminals inserted into the corresponding terminal grooves of the insulating body, and the other terminals comprise grounding terminals arranged in a high-speed signal area; the grounding shielding sheet is connected with each grounding terminal; the high-density ultra-high-speed bus expansion electric connector can enable signal transmission to be better and more stable.

The invention relates to the technical field of model generation, in particular to a three-dimensional digital model generation method and system based on a glass fiber reinforced plastic streamline headstock. The method comprises the following steps: testing the whole hot-press molding process of a standard glass fiber reinforced plastic sample to obtain the thermal expansion coefficient of the glass fiber reinforced plastic material; constructing a glass fiber reinforced plastic shrinkage tensor field based on the glass fiber reinforced plastic material thermal expansion coefficient; performing paving layer path topological relation construction on the headstock fiber paving layer to obtain a headstock paving layer path diagram; performing path-process coupling deformation prediction on the headstock fiber bundle based on the headstock layering path diagram to obtain layering path deformation prediction data; and obtaining an initial vehicle head three-dimensional model. According to the method, the risks of superspeed train rendezvous pressure wave exceeding and sensor false triggering are remarkably reduced, the design precision is integrally improved, the iteration period is shortened, and the wind tunnel test cost is saved.

The present invention relates to a five-degree-of-freedom ultra-high-speed bearingless permanent magnet motor. Both ends of a cylindrical solid permanent magnet are respectively connected to a rotating shaft. A casing is installed outside the cylindrical solid permanent magnet. A stator core is fixedly installed on the casing. A set of torque windings is embedded in the bottom layer of the stator core, and two sets of suspension windings are embedded in the upper layer of the stator core. End covers are fixedly installed on both sides of the casing. Auxiliary bearings are installed between the end covers and the rotating shaft. Passive permanent magnet bearings are nested on both the end covers and the rotating shaft. The present invention is reasonably designed, integrating a magnetic suspension bearing and a permanent magnet motor into one. While the motor generates an electromagnetic torque capable of driving the rotor to rotate, it can also generate a radial suspension force to overcome the rotor gravity and unilateral magnetic pull force, simplifying the motor structure and shortening the axial length of the motor. The double suspension windings and the axial passive permanent magnet magnetic bearing achieve five-degree-of-freedom control, increasing the rotor stiffness and critical speed of the ultra-high-speed motor, and improving the operation stability and anti-disturbance ability.

The present application discloses an ultra-high-speed jet drug delivery device, which relates to the field of drug delivery technology and includes: a jet parameter setting module for determining the direction and speed of the jet according to the drug delivery requirements; a high-energy current module for generating high-energy current to make the metal wire reach a high-temperature state instantly, driving the drug solution to form a high-speed fluid; a nozzle for converting the high-speed fluid into a jet according to the direction and speed of the jet determined by the jet parameter setting module; a sensor module for monitoring the distribution of the drug solution in the body in real time; and a precision delivery module for controlling the jet parameter setting module in real time to adjust the direction and speed of the jet according to the distribution of the drug solution in the body and the drug delivery requirements. In the present application, electric explosion technology is used to form a high-speed jet, providing powerful kinetic energy to effectively penetrate human tissue, achieve precise drug delivery to deep target areas, and combine with sensors to ensure that the drug jet is accurately delivered to deep tissues.

The invention belongs to the technical field of seeding, and particularly relates to an intelligent precision seed-metering device based on electromagnetic control and a seed-metering method, and the seed-metering device comprises a seed-metering disc assembly and an electromagnetic intelligent seed pushing assembly. The seed metering plate assembly is provided with a seed hole with an annular permanent magnet; the electromagnetic intelligent seed pushing assembly comprises a control module, an electrified solenoid and a flexible seed pushing assembly with a permanent magnet sliding block and a flexible pushing disc. During working, the magnetic attraction force between the seed-metering disc permanent magnet and the sliding block permanent magnet is combined with the controllable electromagnetic force generated by the electrified solenoid to cooperatively drive the sliding block to complete the seed pushing action. The electric signals are controlled through programming, and various operation modes such as ultra-high speed, precision low loss and variable jump broadcast can be switched in real time. According to the invention, the embedded real-time monitoring and fault diagnosis of the seed pushing action are realized by using an electric signal generated by the movement of the sliding block in the induction coil. According to the invention, the problem that the existing seed-metering device is difficult to consider high-speed, low-loss and multi-mode operation and intelligent monitoring at the same time is solved.

The invention discloses application of rehmannia extracellular vesicles in preparation of a medicine for improving breast cancer bone metastasis bone injury, and belongs to the technical field of biological medicine. The preparation method comprises the following steps: cleaning the root tuber of a fresh rehmannia plant, adding a PBS (Phosphate Buffer Solution), crushing, and filtering by gauze to remove large-particle impurities; performing high-speed centrifugation on the filtrate to remove insoluble residues, then performing ultra-high-speed centrifugation to collect precipitates, re-suspending the precipitates, purifying the precipitates by adopting PEG (Polyethylene Glycol), and centrifugally collecting the precipitates, thereby obtaining the rehmannia extracellular vesicles. The rehmannia extracellular vesicles can effectively target bones, promote proliferation of bone-related cells and remarkably reduce bone injury caused by bone metastasis of breast cancer; bone protection treatment is carried out on breast cancer bone metastasis through the Chinese herbal medicine vesicles sourced from rehmannia, a safe and effective treatment scheme is provided for improving the pathological osteolysis problem caused by breast cancer bone metastasis, a new thought and technical support are provided for prevention and treatment of tumor bone metastasis related diseases, and good clinical transformation prospects are achieved.

The invention provides an impeller high-temperature over-rotation test device. The impeller high-temperature over-rotation test device comprises a long shaft, an impeller, a press-fitting assembly, a buffer assembly and a fixing piece. The long shaft comprises a first shaft body and a second shaft body which are concentric and different in diameter, the impeller is sleeved on the first shaft body, and press-fitting parts are formed at two ends. The first press-fitting assembly and the second press-fitting assembly are pressed on the press-fitting parts on the two sides of the impeller correspondingly, relative rotation is prevented through the rectangular keys, the double press-fitting assemblies are symmetrically arranged to balance axial force, and rotation stability is improved. The left / right clamping sleeve is matched with the conical surface of the left / right taper sleeve, and a tensioning wire groove is formed to adapt to impellers of different sizes and compensate size changes. The buffering assemblies are arranged in a mirror symmetry mode, the horn mouth design optimizes stress distribution, long-axis thermal expansion is absorbed, and vibration impact is resisted. The fixing piece provides axial fixing force, and the axial rigidity of the system is optimized. The device can ensure the reliable positioning of the impeller at high temperature and ultrahigh speed, and improves the test precision and reliability.

The invention provides a preparation method of a nickel-based WC alloy coating on the surface of a glass mold punch. The preparation method sequentially comprises the steps of matrix pretreatment, hypersonic flame spraying, ultrahigh-speed laser remelting and aftertreatment. The nickel-based WC alloy coating is prepared on the surface of the glass mold punch by adopting a supersonic spraying and ultra-high-speed laser remelting composite process, on one hand, a mechanical interlocking framework is formed by adopting nano-scale WC powder and micron-scale WC powder composite double-peak gradient powder, rare earth oxide is doped, nano-particle aggregation is inhibited through a vacuum ball-milling process, and the mechanical interlocking framework is formed by adopting a double-peak gradient powder composite double-peak gradient powder; the compactness of a cladding layer is improved; and on the other hand, the parameters of the composite technology are controlled, it is guaranteed that nanoscale WC is completely dissolved in a molten pool, a W-C-Fe diffusion layer is formed on an interface, a WC / W2C hard phase is separated out after micron-sized WC is partially dissolved, the bonding strength is improved, and the compactness and hardness of the coating are improved.

The invention relates to the technical field of energy-saving permanent magnet motors, and discloses a permanent magnet rotor system capable of guaranteeing ultra-high-speed stability, which comprises a permanent magnet rotor and a controller, and is characterized in that the controller injects current synthesized by fundamental waves and specific space harmonics into a stator winding on the basis of not depending on rotor radial position feedback, so that the permanent magnet rotor is controlled to rotate; an electromagnetic potential well with radial self-recovery force is constructed in an air gap of the motor; moreover, the controller also monitors the change rate of an internal torque instruction, foreseeably and instantaneously reinforces the potential well to resist impact, and synchronously corrects the fundamental current to eliminate parasitic torque pulsation associated with reinforcement. And the rotor stability is converted from a dynamic adjustment problem depending on external high-speed closed-loop control to an intrinsic constraint problem of motor self-guarantee, so that the risk of failure caused by signal delay at an ultra-high speed in traditional reaction type control is reduced.

The invention discloses a low-carbon post-disaster rescue system based on quantum computing and an autonomous robot technology, and belongs to the technical field of post-disaster rescue. The system comprises a post-disaster information acquisition module, a data acquisition and analysis module, a quantum computing decision optimization and resource scheduling module, an autonomous robot task scheduling and execution module and a low-carbon technology model module. Performing ultra-high-speed processing and multi-target optimization decision on post-disaster environment data by adopting a mixed quantum annealing algorithm, and generating a resource scheduling and path planning scheme; the autonomous robot executes post-disaster building evaluation, material delivery and personnel search and rescue tasks based on an AI algorithm, so that the manual risk is reduced; and by combining low-energy-consumption hardware, renewable energy power supply and real-time carbon emission monitoring technologies, the carbon emission in the rescue process is reduced by more than 30%. The intelligent low-carbon rescue system solves the problems of low rescue efficiency, poor safety and high carbon emission in the prior art, is suitable for extreme post-disaster scenes with communication interruption, and provides an innovative solution for intelligent low-carbon rescue.

The invention relates to the technical field of photoetching machine data transmission, and discloses an ultra-high-speed distributed data transmission synchronization system of a direct-writing photoetching machine. The system comprises a dynamic exposure pulse analysis module which constructs a distributed transmission delay calculation model based on historical operation data, collects data such as a laser trigger pulse sequence in real time and outputs a theoretical transmission synchronization value; the multi-channel time sequence offset detection module generates a node-level multi-channel time sequence offset matrix through multi-dimensional comparison of the theoretical value and the actual transmission time sequence; the spatial topology mapping module is combined with the physical position and the link impedance parameter to generate a time sequence abnormal propagation path probability distribution cloud picture so as to locate a high-delay area; and the dynamic bandwidth allocation module configures a transmission strategy according to the data, starts redundant channel parallel transmission for a high-delay area, and implements dynamic clock offset compensation for adjacent nodes, so that the synchronization stability and transmission efficiency of data transmission are effectively improved.

The embodiment of the invention provides a split-board multi-path server system, method and device, the system comprises N mainboards, an adapter board and a management board, the mainboards are in communication connection with one another, the mainboards are in communication connection with the adapter board, and the adapter board is in communication connection with the management board; the mainboard sends an in-place signal to the adapter plate for representing the working state of the mainboard; the adapter board sends identification signals to the mainboards and the management board according to the number of the in-place signals to indicate the number of the mainboards in the current working state, and the management board monitors and manages the mainboards according to the identification signals; and the pre-configured first mainboard CPU opens an ultra-high-speed path interconnection UPI channel corresponding to the identification signal. By means of the technical scheme, the technical problems that in the prior art, a multi-channel server system is high in hardware cost, large in software complexity and inflexible in mainboard layout can be effectively solved.

The invention discloses a test device and method for simulating an ultra-high-speed penetration ground impact effect, and the device employs a static load loading system to apply a static load to the periphery of a sample so as to simulate a ground stress environment, and employs a dynamic load loading system to apply an impact dynamic load to the top of the sample so as to simulate ground impact. In the dynamic loading system, a phase change reaction kettle is used for heating liquid CO2 to a supercritical high-pressure state; the liquid filling module is used for filling liquid CO2 into the phase change reaction kettle; the gun barrel is used for receiving high-pressure gas released by the phase change reaction kettle and forming ground shock waves similar to a plane; the stress wave lens module is used for adjusting the width of shock waves through a stress wave lens combination and acting the shock waves on the sample; the control module can control the shock wave peak pressure by regulating the heating power of the phase change reaction kettle, and can control the duration time of shock waves by regulating the bore diameter of the gun barrel. According to the invention, controllable and high-fidelity simulation of the ultra-high-speed penetration impact effect is realized.

The invention relates to a Manchester coded signal decoding method and a Manchester coded signal decoding system, and belongs to the field of electronic information, communication and power system automation. A plurality of clocks with the same frequency and different phases are generated according to Manchester encoding signals, the clocks are used for sampling the signals, a phase-shifting clock sampling method is used, dependence on a high-frequency clock is reduced, most interference in communication signals is determined to be eliminated according to a majority voting strategy for sampling results, and the accuracy of the signals is improved. And the seriously distorted signals are corrected according to special value enumeration, so that the interference of signal duty ratio distortion and burrs is reduced, and the decoding reliability is further improved. And finally, determining an original data stream of the signal according to the two level states of each code element. The method is used for decoding high-speed and ultra-high-speed Manchester encoding signals under the conditions of no high-frequency clock, poor data signal quality or unstable clock, and simultaneously realizing self-adaptive communication of different encoding formats.

The invention relates to the technical field of ultra-high-speed motor design, fluid mechanical engineering and electromagnetic-structure coupling, in particular to an innovative structure-electromagnetic coupling design of a centrifugal hydrogen circulating pump driven by an ultra-high-speed permanent magnet motor. The integrated coupling rotor system is formed by rigidly connecting a permanent magnet motor rotor and a centrifugal impeller through conical surface interference and key groove positioning, a rotor iron core is formed by laminating 0.2 mm ultrathin silicon steel sheets (35W250), and impeller blade molded lines are optimized based on electromagnetic force harmonic characteristics (the number of blades is equal to the number of motor poles + / -1); the coupling matching degree is remarkably improved: through structure-electromagnetic parameter collaborative optimization, the comprehensive efficiency of the system reaches 85% or above, and is improved by 12%-15% compared with that of a separation design; an anti-resonance damping module is combined with a frequency avoidance design, and the vibration acceleration in an ultra-high-speed interval is smaller than or equal to 8 g and is reduced by 60% or above compared with a traditional design; the torque-load matching time is less than or equal to 0.3 s when the flow is suddenly changed, overcurrent impact or surge is avoided, and the dynamic requirement of a fuel cell system is met.

The invention discloses an ultra-high-speed motor bearing anti-deformation crown-shaped retainer and a manufacturing method, and belongs to the technical field of motor bearings. The super-high-speed motor bearing anti-deformation crown-shaped retainer is formed by printing functionally graded materials, the functionally graded materials comprise a hard-phase material and a soft-phase material, the hard-phase material is glass fibers, and the soft-phase material is nylon 66; the equivalent elastic modulus of the functionally graded material is continuously and gradually changed in the axial direction from the bottom of the pocket to the tail end of the lock claw, so that the elastic modulus of the bottom area of the pocket is higher than that of the tail end area of the lock claw, and elliptical deformation of the pocket and centrifugal deformation of the lock claw are cooperatively restrained. And active reconstruction of a rigidity field of the crown-shaped retainer is achieved, specifically, a tough phase is constructed in a locking claw area to absorb collision energy, a strengthening phase is formed in a pocket area to weaken stress concentration, a rigidity gradient is established at a connecting part to restrain the umbrella-shaped effect, and the crown-shaped retainer with the high toughness-gradient-high strength characteristics and the design method of the crown-shaped retainer are provided.

The invention discloses a method for preparing a copper-tin alloy coating on the surface of steel through ultrahigh-speed laser cladding, which comprises the following steps of: S1, pretreating a steel substrate, and controlling the surface roughness Ra to be 2.5-3.2 microns; s2, spherical copper powder and flaky tin powder with the particle size of 15-53 microns are taken, and the copper powder is treated through microwave plasma, so that a nanoscale copper oxide layer is formed on the surface of the copper powder; s3, tin powder and the activated copper powder serve as coating raw materials, an airborne double-barrel powder feeder is adopted, laser is in a flat-top type circular light spot mode, a steel substrate moves relative to a laser cladding device according to a set track, the laser power is 3.5-4.5 kW, the laser scanning speed is 50-80 m / min, and the copper powder is molten into a liquid state to wrap the tin powder; and the temperature of the molten pool is monitored in real time, so that the temperature is stabilized at 1300-1400 DEG C, and finally the copper-tin alloy coating is prepared on the surface of the steel substrate. According to the method, efficient, high-precision and low-defect manufacturing of the copper-tin alloy coating is achieved through a light-powder-matrix coordinated regulation and control mechanism.

The invention relates to the field of high-speed serial interface chips, and discloses an error calibration method of an ultra-high-speed phase interpolator. The method comprises the steps of amplitude calibration, edge searching, reference clock delay calibration, multi-phase cyclic calibration, linear interpolation and the like, a reference clock rising edge zero crossing point is used as a high-precision time reference, delay control words of a selected discrete phase are adjusted one by one, a mapping lookup table covering a full-phase range is generated through linear interpolation, and the time delay control words of the selected discrete phase are adjusted one by one. And compensation of the nonlinear error of the phase interpolator is realized. According to the invention, high-precision linearity calibration can be completed before normal operation of the chip, the clock recovery precision is significantly improved, the nonlinear error is reduced from + / -1.5 LSB to + / -0.5 LSB, the error rate of the system is reduced, and the power consumption and the area overhead are low.

The invention provides an ultra-high-speed concentric steel tape armoring machine and a steel tape armoring system. The steel belt armoring machine comprises an outer swing frame and an inner swing frame. The outer swing frame and the inner swing frame are rotatably mounted on the seat body respectively; the outer swing frame is provided with an outer guide wheel; the inner rotating frame is provided with a steel belt storage wheel; the armored steel belt is wound on the steel belt storage wheel and then is wound on the outer guide wheel; under the winding action of the armored steel belt, the inner rotating frame is driven by the main driving device to rotate through the steel belt; when a cable is wrapped by the steel belt, the steel belt is consumed at a certain speed, under the driving force of the steel belt tension driving device, the steel belt between the outer rotating frame and the inner rotating frame keeps preset tension, and the tension enables the outer rotating frame and the inner rotating frame to rotate relatively at a low speed. Due to the action of the outer rotating frame, the inner rotating frame and dual driving, the steel belt can be supplied and wound more stably, the difference between the output extension direction of the steel belt and the surface of the cable to be armored is smaller, and the cable armoring quality can be greatly improved.

The invention relates to the technical field of aerogel materials, in particular to a Si3N4 nanofiber aerogel material and a preparation method thereof. The aerogel material is formed by stacking and assembling multiple layers of Si3N4 nanofiber films, the upper surface of each Si3N4 nanofiber film is of a high-density network structure formed by interweaving Si3N4 nanofibers, and the lower surface of each Si3N4 nanofiber film is of a pearl necklace-shaped structure formed by interweaving Si3N4 nanofibers and Si3N4 nanoparticles. The preparation method disclosed by the invention provides a new thought for developing the structure-enhanced nanofiber aerogel, and the Si3N4 nanofiber aerogel material prepared by the method disclosed by the invention is expected to meet the development requirements of a wave-transparent antenna housing of an ultra-high-speed aircraft on a high-temperature-resistant / heat-insulating / wave-transparent integrated material.

The invention relates to an ultra-high-speed differential quick-break protection method and device for a converter transformer, and belongs to the technical field of converter transformers. If adjacent sampling points of the converter transformer meet the condition that the current differential current instantaneous value variable quantity reaches a preset first current threshold value used for judging whether abrupt change current is generated in a circuit or not, the abrupt change current is generated in the circuit; if so, starting a first broadening time; according to the differential current instantaneous value variable quantity and a preset differential quick-break current value, first time period point extraction judgment is carried out; according to the absolute value variable quantity of the voltage instantaneous value and a preset first voltage threshold value used for judging whether the converter transformer is being charged or not, comprehensive voltage out-of-limit judgment in a second time period is carried out; and in the first broadening time, in response to the condition that the criterion of point extraction judgment in the first time period is met and the criterion of comprehensive voltage out-of-limit judgment in the second time period is not met, determining that the converter transformer has a fault, triggering a protection action, quickly identifying the fault and acting an outlet.

The invention provides a corrosion-resistant iron-based amorphous material suitable for ultrahigh-speed laser cladding and a preparation method of the corrosion-resistant iron-based amorphous material. The corrosion-resistant iron-based amorphous material is characterized in that an iron-based amorphous coating comprises the following components in percentage by weight: 27-29 wt% of Cr, 2-3 wt% of Co, 1-3 wt% of Nb, 3-5 wt% of Mo, 5-8 wt% of Ce, 3.6-3.8 wt% of B, 4.3-4.5 wt% of Si, 0.7-0.9 wt% of C and the balance of Fe. Amorphous alloy powder is prepared by combining vacuum induction melting with a gas atomization powder preparation technology, a coating is prepared on the surface of a base body by adopting an ultra-high-speed laser cladding technology, the coating has high amorphous content and excellent corrosion resistance, and meanwhile, low porosity (llt) is achieved through the ultra-high-speed laser cladding technology; the coating has the advantages of high hardness (greater than or equal to 800HV) and strong bonding strength (greater than or equal to 70MPa), prolongs the service life of maritime work equipment in a marine environment, is suitable for industrial popularization, is suitable for surface protection of marine equipment, chemical equipment and other severe environments, and has the advantages of efficient process, environmental protection, low cost and strong corrosion resistance.