188results about How to "Achieve continuous change" patented technology

The invention relates to a pavement structure and a testing device for bridge deck pavement bonding interface shearing-resistance characteristic, which are based on mechanics principle and indoor test, effectively simulate road surface and simulate stress conditions, can realize continuous change with 0-80 degrees of shearing angle, meet needs of different working conditions and are suitable for the design and research of the pavement structure, the indoor test and engineering test. The testing device comprises an upper part and a lower part, each part comprises a bearing board, a rolling shaft, an arc base, a semi-circular clamp, an internal collet and a clamp fixing device. The whole device also comprises an angle dial scale and an angle pointer and other attached parts which are used for indicating the size of the angle. A square testing piece is arranged in the internal collet, the semi-circular clamp and the base can rotate relatively, after the shearing angle is set, the clamp and the base are fixed by the clamp fixing device. The horizontal surface of the other side of the base is contacted with the bearing board in a rolling way by the rolling shaft, so as to lead the device loading to generate vertical displacement and to move horizontally at the same time.

The invention discloses a testing system of cutting force and torque loading reliability of a numerical control turret power knife rest, which comprises a supporting part and a loading part. The supporting part comprises a numerical control turret power knife rest supporting part, a cutting force loading supporting part and a torque loading supporting part. The numerical control turret power knife rest supporting part is fixed at left side below a floor iron, and the torque loading supporting part is located at the right side below the floor iron. The loading part comprises a dynamic cutting force loading part, a cutting torque loading part and a loading bar. The dynamic cutting force loading part is connected with a rotating plate in the cutting force loading supporting part through a 2# sliding plate. The cutting torque loading part comprises an eddy current dynamometer and an elastic coupler. The eddy current dynamometer is installed on a 3# pedestal, the output end of the eddy current dynamometer is connected with the elastic coupler, the elastic coupler is connected with a right end key of the loading bar sleeved with a bearing loading unit, and the left end of the loading bar is fixedly connected with the right end of a power knife seat on the measured numerical control turret power knife rest.

The invention provides a micro fluid flow adjusting device based on air pressure drive, belongs to the field of micro fluids, and aims to solve the problems of low flow adjusting precision, low dynamic response speed and absence of capacity of measuring actual flow when an injection pump is adopted to adjust the flow in a micro fluid system. The micro fluid flow adjusting device adopts an air pressure drive mode, an air supply source supplies compressed air, outlet pressure is adjusted and set by a pressure reducing valve to obtain stable air supply pressure, the pressure is measured by a pressure sensor, a liquid in a liquid container passes a valve and a flow meter to enter a liquid micro-channel under the pushing of the air pressure, the actual liquid flow is measured by the flow meter and fed back to a microprocessor, the microprocessor outputs a control signal to change the working state of a micro valve, the liquid flow of the liquid micro-channel is adjusted, and closed-loop control of the flow is realized; further, a PID (proportion integration differentiation) control algorithm can be adopted, the adjusting precision and the dynamic response speed of the flow can be increased, and the liquid flow in the micro-channel can be adjusted accurately and rapidly.

The invention provides a cadmium-free core-shell quantum dot and a preparation method thereof; the cadmium-free core-shell quantum dot comprises a quantum dot core, a gradual transition layer continuously grown on the surface of the quantum dot core, and a shell layer formed on the surface of the gradual transition layer, wherein the gradual transition layer comprises core cations and core anions in the quantum dot core, and shell cations and shell anions in the shell layer; in the cadmium-free core-shell quantum dot, the concentrations of the core cations and core anions decrease gradually from inside to outside, and the concentrations of the shell cations and shell anions gradually increase from inside to outside.

The invention discloses a guided wave signal analyzing method based on time delay. The time delay and the linear superposition are carried out on the basis of multiple groups of original signals for detecting ultrasonic guided wave, and multiple groups of original signals are separated in directions and combined into two detection result curves finally. The method comprises the steps of: mounting N sensors, wherein each sensor group corresponds to one channel, the sensors are divided into an A-ring and a B-ring and respectively set in odd number and even number, and the interval between the A-ring and the B-ring is 1 / 4 of the wavelength of exciting signal central frequency; selecting M windowing modulation sine waves with different central frequencies and the certain periodicity as the exciting signals, wherein the M turns of exciting signals have respective central frequency and bandwidth in the frequency domain, each turn of exciting signals covers a certain frequency range, and M*N*N groups of data are obtained by exciting and changing the central frequencies for many times; and obtaining a final pipeline detection curve graph by the calculation to realize the separation in the direction of detection and the separation of symmetrical and unsymmetrical signals, which is convenient to find out defects on the pipeline.

The invention discloses a dedusting and demisting device of a spiral flow plate. The dedusting and demisting device comprises a plurality of dedusting and demisting units, wherein each dedusting and demisting unit comprises a hollow overflowing barrel body, a spiral flow cyclone is arranged in the overflowing barrel body, a flue gas guiding device is connected to the lower part of the spiral flow cyclone, the flue gas guiding device is fixedly connected with the overflowing barrel body, a blowing hole is formed in the flue gas guiding device, and a discharge hole is formed in the inner wall of the overflowing barrel body; the flue gas guiding device is a variable cross-section truncated cone-shaped hollow barrel body of which the cross-sectional area changes continuously, and the upper end surface of the truncated cone-shaped hollow barrel body is connected with the spiral flow cyclone. By using the flue gas guiding device, continuous change of the airflow moving state is realized, the stability of a formed liquid film is good, and secondary entrainment of liquid drops is effectively prevented. Compared with a dedusting and demisting device without the guiding device, the gas distribution state is more uniform, and local disturbance of airflow which passes through the spiral flow cyclone is effectively reduced, so that the airflow moving state is more stable, and the stability of the formed liquid film is better.

The invention relates to a method for preparing bismuth telluride alloy membrane through a co-sputtering and sedimentation method. The invention is implemented on a magnetism control sputtering instrument, a high purity bismuth sheet is stuck on a high purity bismuth target through conducting glue, and the compound target is taken as the sputtering target material to perform co-sputtering; the single crystal silicon chip is taken as the membrane lining bottom. The invention has the technology parameters that: the bottom vacuum degree is higher than 1.0*10-3Pa, the working argon gas pressure is 0.2 to 3Pa, the target base distance is 4 to 10cm, the base sheet table is rotated for 5 to 15 circles per minute, the membrane lining bottom temperature is 100 to 300 DEG C, the sputtering power source power is 20 to 100W, and the annealing temperature is 200 to 300 DEG C. The invention has the advantages that the sedimentation membrane components can be easily adjusted by changing the size and quantity of the sticking target on the standard target material; in particular, to the sputtering compound target with larger deposited membrane component difference, and the exploration of the optimum component doping quantity, the method is simple, the feasibility is strong, the product quality is reliable, and the reproducibility is good.

The invention discloses a nozzle liquid mist distribution adjustable rocket engine jet faceplate and a design method. The nozzle liquid mist distribution adjustable rocket engine jet faceplate comprises a gas collecting cavity base, a gas collecting cavity middle plate, a gas collecting cavity rear plate, a fuel cavity top cover, a fire transferring tube and a plurality of double-swirl nozzles, wherein a gas collecting cavity is divided into two oxygen cavities; a fuel cavity is formed between the fuel cavity top cover and the gas collecting cavity rear plate; the plurality of double-swirl nozzles are uniformly distributed along the circumference of the fire transferring tube; each double-swirl nozzle comprises a nozzle inner core, a nozzle inner layer and a nozzle outer layer; an inner mixing cavity is formed between the nozzle inner core and the nozzle inner layer; an outer mixing cavity is formed between the nozzle inner layer and the nozzle outer layer; the nozzle inner core is provided with a fuel jet hole; inner swirl holes are uniformly distributed on a nozzle middle layer along the circumference; and the nozzle outer layer is provided with a large through hole, an outer swirl hole and a jet hole; and the swirl direction of the outer swirl hole is opposite to the swirl direction of the inner swirl holes. The flow ratio of inner swirling eddy to outer swirling eddy can beadjusted by controlling the jet pressure drop of the inner swirl hole and the outer swirl hole, so that liquid mist of different distribution patterns is formed.

The invention relates to a fractional-order KiBaM electrochemical and fractional-order equivalent circuit comprehensive characteristic battery model and a parameter identification method thereof. A model is modeled by a fractional calculus principle so as to be provided with more degree of freedom and more flexibility and innovation. The introduction of the fractional order provides many new phenomena and rules and achieves superiority that cannot be achieved by a conventional integer-order battery model. The KiBaM electrochemical model and the equivalent circuit model are both generalized to the fractional order. Model parameters and orders at different SOC positions are identified on the basis of the least square method. Thus, a variable-order fractional-order battery model based on SOC is obtained so as to realize the advantage complementation of the battery KiBaM electrochemical model and the second-order RC equivalent circuit model. The nonlinear capacity effect and the running time and the output I-V external characteristics of the battery can be described simultaneously, the comprehensive simulation of the internal characteristics and the external characteristics of the power battery is achieved, and a high application value is achieved.

The invention discloses a high-accuracy broadband continuous adjustable real-time time delay line circuit, adopts a method of combining an active coarse adjustment time delay line with a passive fine adjustment time delay line and improves a bandwidth and a time delay range of the time delay line circuit. The active coarse adjustment time delay line comprises an active voltage control time delay unit and a path selection amplifier. The passive fine adjustment time delay line is formed by cascading a plurality of inductor and variable capacitor pairs, by changing a voltage control variable capacitance value, delay time of the fine adjustment time delay line is changed, and the delay time can make up resolution of coarse adjustment time delay, thereby implementing the delay time continuous change of a real-time time delay line. The real-time time delay line carries out time delay accurate control on active time delay units by a time delay calibration loop, so that time delay is not influenced by changes of the outside environment. The circuit has the advantages of high time delay resolution, wide time delay range, high anti-interference capacity, broadband, high integration, low cost and easiness for integration.

The invention discloses a transonic wind tunnel test supporting device, an installation method and application thereof, and aims to solve the problems that the test result is partially distorted, certain potential risk is present and the accuracy of test data is influenced when an aircraft carries out wind tunnel test by adopting an existing concave bent supporting mechanism. In the device, the existing concave bent supporting structure is improved, so that the test result is more accurate; meanwhile, the bearing mode is changed into tension-compression bearing, so that the longitudinal bearing area, rigidity and strength are improved, and model vibration in test is reduced. Under the coordination of a linear supporting rod and a wind tunnel curved knife, the device can realize continuous variable attack angle test, the attack angle variation range is enlarged, and the test efficiency is greatly improved. The device is reasonable in design and simple in structure, can effectively improve the accuracy of data and the efficiency of test and reduce vibration in test, and has a good application prospect.

The invention relates to a method capable of continuously adjusting color temperature and brightness of a LED (light-emitting diode) light. The method comprises the steps as follows: firstly, selecting a cold white light LED and a warm white light LED; forming the selected cold white light LED into a series return circuit to connect in series with the warm white light LED; forming the selected warm white light LED into a series return circuit to connect in series with the cold white light LED; adjusting the pulse width according to a corresponding cold white light controlling circuit and a corresponding warm white light controlling circuit; providing the specific driving current for the return circuits of the cold white light LED and the warm white light LED by adjusting the pulse width; and therefore, obtaining the required color temperature and brightness. The method has a simple process and is easiness in popularization. Besides, the method can realize the continuous change of the color temperature range from 2700K to 7000K, maintain the characteristic stability of the color temperature and the light passing of the LED even if the LED lights up for a long time, and adjust the brightness change from 0 to 100%.

The invention provides a forming method capable of customizing strength of ultrahigh-strength steel hot-stamped parts. The total electric energy input to steel plates by resistance heating is constant, different cross-sectional area portions are different in input energy in unit cross-sectional area, and heating temperatures are different, so that different strength is obtained. When the input energy in unit cross-sectional area is 825jmm<-2>, steel plates can be heated to a complete austenitizing temperature within 3s, and tensile strength of the steel plates after hot forming reaches above 1600MPa; when the input energy in unit cross-sectional area is lower than 688jmm<-2>, the heating temperature of the steel plates can be lower than the austenitizing temperature, and the tensile strength of the steel plates after hot forming is 600-700MPa. The cross-sectional areas and the sizes of the steel plates are designed according to strength requirements of different portions of components, hot-formed structural parts obtained after hot stamping have optimal strength and plasticity matching, overall weight of original parts is reduced, side-impact deformation resistance of automobiles is improved, and collision energy can be absorbed well.

The invention discloses an adaptive continuously-adjustable cavitation device structure. The adaptive continuously-adjustable cavitation device structure comprises a benchmark chassis, a rotatable telescopic assembly and a drive mechanism assembly which are connected with one another, wherein the benchmark chassis and the rotatable telescopic assembly rotate under the power drive action of a servomotor, and the diameter of an outer edge formed by multiple layers of sector part groups in rotating is continuously adjustable along with rotation changes of the servo motor. In the variable speed sailing process of an underwater sailing body, the adaptive continuously-adjustable cavitation device structure provides power through the drive mechanism assembly to drive the multiple layers of sector part groups of the rotatable telescopic assembly to synchronously expand outward or contract inward, and adjusts the drive mechanism assembly according to change situation feedback of hydrokinetic parameters of an external flow field of the sailing body so as to realize adaptive change of the diameter of a cavitation device, thereby completing control for the size and the form of vacuoles, decreasing the wetting area of the underwater sailing body and reducing pressure difference resistance additionally caused to the utmost, greatly reducing frictional resistance and total resistance, and greatly improving the maximum speed and sailing distance of the sailing body.

The invention relates to a tooth surface distortion compensation method during worm wheel grinding of an axial modified helical gear. The method solves the problem of tooth surface distortion when worm wheel grinding is conducted on a helical gear with axial modification, calculates the additional motion quantity of a grinding wheel during worm wheel dressing according to the warp quantum of a tooth surface on the basis of building a tooth surface warp quantum calculation model during worm wheel grinding of the axial modified helical gear, overlays additional motion on conventional worm wheeldressing motion to change a pressure angle of left and right tooth surfaces of the grinding wheel, and compensates tooth surface distortion by continuously changing the pressure angle in a width direction of the grinding wheel aiming at a continuous change trend of a profile pressure angle of a gear end section during tooth surface distortion, thereby improving the accuracy of worm wheel grindingof the axial modified helical gear.

The invention discloses a blue-phase liquid crystal displayer with a continuously-controllable view angle. The blue-phase liquid crystal displayer with the continuously-controllable view angle comprises an upper polarizer, an upper lambda / 4 double-axis membrane, an upper lambda / 2 negative A piece, an upper lambda / 4 positive A piece, an upper glass substrate, a first Common electrode, a first protective layer, blue-phase liquid crystals, a second protective layer, an electrode layer, an insulating layer, a second Common electrode, a lower glass substrate, a lower lambda / 4 negative A piece, a lower lambda / 2 positive A piece, a lower lambda / 4 double-axis membrane and a lower polarizer in sequence from top to bottom, wherein the electrode layer comprises first Pixel electrodes and second Pixel electrodes, and the first Pixel electrodes and the second Pixel electrodes are distributed in an alternate mode. The blue-phase liquid crystal displayer with the continuously-controllable view angle successfully overcomes the defect that the contrast ratio of a traditional blue-phase liquid crystal displayer with a controllable view angle only ranges from 10 to 30 under the condition of the narrow view angle. When different offset voltage is applied to an offset electrode, the narrow view angle mode that view angles are different in display effect and the contrast ratio continuously changes can be achieved.

The invention provides an electro-hydraulic proportional solenoid valve. The valve comprises a valve core, an oil outlet valve sleeve, a guide sleeve, a magnetism isolating ring, a pole shoe and a coil, wherein the magnetism isolating ring is of a non-magnetic material; the two ends of the magnetism isolating ring are connected with the guide sleeve and the pole shoe respectively to form a sleeve; the coil is arranged on the outer side of the sleeve; the oil outlet valve sleeve is provided with at least one oil outlet hole; one end of the oil outlet valve sleeve is in interference fit with the guide sleeve; the outer circumferential surface of the end part at one end of the valve core is provided with at least one oil inlet wedged groove, and the end face is provided with a straight groove which is communicated with the oil inlet wedged groove; the valve core is positioned in the sleeve; the position of the oil inlet wedged groove corresponds to the position of the oil outlet hole and is not overlapped with the oil outlet hole; a pre-tightening screw is arranged in the pole shoe; a return spring is arranged between the pre-tightening screw and the valve core. The assist characteristic of an automobile steering system can be continuously changed with vehicle speed, so the assist effect is better; the valve has the advantages of compact structure, easiness in control and low cost.

The invention discloses a microstrip antenna capable of electrical adjustment of beam direction and beam width. The antenna mainly comprises three parts: five microstrip radiation patch units, a substrate, and a feeding circuit, continuous adjustment of the beam direction and the beam width in two vertical planes xoz and yoz can be realized via the adjustment of the control voltage of a varactor, the adjustable range of the beam direction is -20 degrees to 20 degrees, and the adjustable range of the beam bandwidth is 90 degrees to 120 degrees. The microstrip Yagi-Uda antenna capable of electrical adjustment of beam direction and beam width is advantageous in that at the working frequency point, the feeding circuit is simple, the echo loss is low, the gain variation range is small, and the cross polarization discrimination rate is high.

The invention discloses a suction anchor uplift bearing capacity dynamically testing device and method. The suction anchor uplift bearing capacity dynamically testing device comprises a model case, asuction anchor, a guide plate, arc guide rails, stand columns, a displacement tuning device and a horizontal limiting device; the side wall of the suction anchor is provided with a vertical sliding rail, and the suction anchor is embedded into the cylindrical model case; the top edge of the model case is provided with the four stand columns arranged in a semi-arc mode at equal intervals; the guideplate is composed of a vertical plate and a top-end radial triangular support and sleeves the upper arc guide rail, the middle arc guide rail and the lower arc guide rail so as to move around the circumference of the wall of the model case; the guide plate is provided with a sliding rail in full length, the top end of the guide plate is connected with the horizontal limiting device; the displacement tuning device is arranged in a clamped mode on the suction anchor and the sliding rail of the guide plate, which are connected through an anchor chain, and the anchor chain is guided out of the model case through pulleys. The suction anchor uplift bearing capacity dynamically testing device can dynamically test the uplift bearing capacity of the suction anchor at any vertical anchor point andat any spatial angle to provide a test method for determining optimal mooring point depth and load bearing direction, thereby being in applicability.

The invention discloses a display screen, a display device and a display method and belongs to the technical field of display. The display screen comprises a display panel and a dyed liquid crystal box that is positioned no one side of the display panel, and the dyed liquid crystal box is used for controlling an emerging direction of light passing through the dyed liquid crystal box under the action of an electric field. The problem that the display device of the related art has low peep-proof sensitivity is solved, the peep-proof sensitivity of the display device of the invention is improved, and the display screen is used for the display device.

The invention provides a phase mask plate of an integer-order vortex beam with a fractional-order vortex profile. A generated novel vortex beam simultaneously has the topological charge of the integer-order vortex and the light intensity profile of the fractional-order vortex. The phase mask plate generates a vortex beam by inputting the phase mask plate into a reflection type spatial light modulator, wherein the transmission rate function expression of the phase mask plate is a formula which is as shown in the specification, wherein A (x, y) is an amplitude modulation function and is used forchanging the profile of the incident coherent light field so as to improve the quality of the vortex beam and avoid the interference of a phase modulation signal and an amplitude modulation signal; ang (.) is an angle-solving function of an imaginary number; rem (.) is a complementary function; m is the topological charge value of the beam, and n is a phase step factor, wherein n is greater thanm; the phase step can be compressed by changing the value of n, so that the required phase step size is generated; theta is the polar angle of a polar coordinate system; and 2 <pi>x / d is a blazed grating item, and is used for generating a blazed grating with a period of d, so that the energy is concentrated in +1 stage diffraction.

The invention discloses a preparation method and use of a morphology-variable inorganic-organic composite inverse opal structure photonic crystal. According to the preparation method, a photonic crystal template which has good sequentiality and is prepared through a vertical sedimentation method is used, gaps of the photonic crystal template are filled with a precursor and the photonic crystal template is removed through an organic solvent so that the morphology-variable inorganic-organic composite inverse opal structure photonic crystals are obtained. Through an electro-wetting process, under the control of voltage, anisotropic infiltration on the surface of the liquid drop structure is realized, morphology change in the inverse opal structure photonic crystal is finished and color change in the infiltration place is realized. The preparation method realizes fast formation of photonic crystal patterns, provides a novel method for photonic crystal patterning preparation and widens latent application prospects in the fields of optical devices, displays and micro fluidic equipment.

The invention discloses a gas storage gas-oil interaction region well productivity predicating method and device, wherein the method comprises the following steps that a function relationship between the gas reservoir net oil cutting quantity and the pressure is determined, and a study object well in a gas-oil interaction region in the gas storage rebuilding operation process is determined according to the function relationship; the gas reservoir development data or well test data of the study object well is processed, a binomial productivity equation of a gas well is obtained, and the influence factor of the gas-oil interaction displacement productivity reduction is determined; according to the influence factors of the gas-oil interaction displacement productivity reduction, the seepage experiment of the gas storage building process is designed, and the gas phase permeability change condition of each cycle period in the gas storage design service life is tested; the binomial productivity equation of the gas well is amended by seepage experiment results, and the productivity, deducting the seepage capability due to the gas-oil interaction displacement in the gas storage operation process, of the study object well is obtained. The method and the device have the advantage that the well productivity predicating accuracy of the oil cutting gas reservoir reconstruction gas storage can be improved.

An electromechanical integrated pulsator controller mainly comprises a working cylinder, a lower end cover, a liquid separating membrane, a fluid chamber, an upper end cover, an inflation valve, a seal ring, limit sleeves, a piston rod, a servo controller, a floating piston, a compensating air chamber, a magnetorheological fluid, an iron core, solenoid coils, gaskets, an outer piston sleeve, a damping channel and a wire. The internal structure of the electromechanical integrated pulsator controller is simple, and an accurate damping force can be obtained as required, so that pulsations are reduced, and the effect of semi-active control is achieved. High frequency pulsations and variable frequency pulsations of a hydraulic pipeline of an airplane can be absorbed. The damping effect is more remarkable. The electromechanical integrated pulsator controller is simple and convenient to use, compact in structure, and high in practicability. A user can load a control program as required. Hydraulic impacts and pulsations can be absorbed quickly and efficiently. The electromechanical integrated pulsator controller has high practicability, can be mounted on the hydraulic pipeline on the airplane, and is used for reducing the pressure and the flow pulsations and impacts in the hydraulic pipeline.

The invention discloses a memristor with continuous variable conductivity and a preparation method and application thereof in the field of the micro-electronic technique. The memristor is specificallyformed in a manner that an active electrode and an inert electrode are formed on the surface of a two-dimensional atomic crystalline material at an interval, wherein the two-dimensional atomic crystalline material is a monocrystal two-dimensional atomic crystalline material with the semiconductor characteristics. A semi-insulating atomic-level smooth surface is provided with the migration of themetal cations of the active electrode in an electric field, thereby enabling the metal cations to migrate to form a conductive fine wire so as to achieve the continuous variable of the conductivity ofthe memristor. The method is simple, economical and feasible. The memristor can be applied to the simulation of the learning and memorizing behaviors of a fruit fly.

The invention relates to a detection method for the capture capability of photoelectric tracking equipment to a target with low contrast. The method comprises the following steps of: mounting a target on a focal plane of a collimation objective between a target integrating sphere and a background integrating sphere; adjusting the light flux of an external light source entering the background integrating sphere until a radiance value measured by a spectrum radiance meter reaches set background brightness; adjusting the light flux of the external light source entering the target integrating sphere until a radiance value measured by a spectrum radiance meter reaches set target brightness; and aligning an optical system of the photoelectric tracking equipment to be detected with the collimation objective and continuously changing target and background contrast until a target with the minimum contrast can be captured by the photoelectric tracking equipment. By the invention, the radiance of the target integrating sphere can be continuously changed to obtain different kinds of target and background contrast. The invention provides an optical measurable accurate reference for detecting the capture capability of the photoelectric tracking equipment to a target with low contrast.

The invention discloses an experiment system and verification method for gap nonlinear rigidity recognition, and the method comprises the steps: building a linear / nonlinear experiment system which hasnear-zero rigidity and allows a gap to be continuously adjusted; carrying out the linear vibration experiment under the condition that the experiment system does not contain the gap features, and measuring a response signal of a system under the given excitation condition; carrying out the nonlinear vibration experiment under the condition that the experiment system contains the gap features, andmeasuring the response signal of the system under the given excitation condition; recognizing the nonlinear vibration experiment measurement data through a to-be-verified gap nonlinear rigidity recognition method, taking a gap quantity measured actually and the recognized rigidity features obtained through the linear vibration experiment as the references, comparing the recognized rigidity features obtained through the nonlinear vibration experiment with the references, and verifying the feasibility and accuracy of the gap nonlinear rigidity recognition method.

The present invention relates to metal organic chemical vapor deposition (MOCVD) method of preparing functional gradient material. The method includes first inverse design of optimizing components of the functional material, calculating physical property and thermodynamic simulation; and then preparing the metal-metal, metal-ceramic or other functional gradient material in MOCVD process with material source of Fe(CO)5, Mo(CO)6, Si(OC2H5)4 and other organic compounds, in regulated reaction gas source pressure and flow rate, substrate temperature 400-600 deg.c and pressure 170-350 Pa, and controlled deposition condition for each layer. The prepared functional gradient material has stable material phase, continuously changed composition, homogeneous and compact transition layer structure and crystal distribution, high heat shock resistance, etc.

The invention relates to a switch-controllable and magnetic field strength-adjustable permanent magnet device which comprises a movable magnet, fixed magnets, pole shoes and a magnet yoke. The fixed magnets are parallelly disposed on the single side or on two sides of the movable magnet to form a magnet component. The magnet component is serially connected with the magnet yoke. The pole shoes are disposed at the top of the magnet component. An air gap is formed between the two pole shoes. The magnetization directions and positions of the fixed magnets keep unchanged, and the movable magnet can rotate around a rotary shaft. Compared with the prior art, the switch-controllable and magnetic field strength-adjustable permanent magnet device is wide in application range, green and energy saving, safe and reliable, small in product size, and the like.

The invention discloses an annular hollow offset-focus laser cladding device, and relates to the technical field of laser processing. The annular hollow offset-focus laser cladding device comprises a shell, a conical reflector, an annular off-axis parabolic focus lens, a nozzle and a powder spraying pipe, the top of the shell is provided with a light inlet, the conical reflector is arranged in the shell, and the conical reflector is arranged facing the light inlet; the annular off-axis parabolic focus lens and the conical reflector are oppositely and coaxially arranged; and the nozzle is installed below the conical reflector, the lower end of the nozzle is connected with the powder spraying pipe, the powder spraying pipe is coaxial with annular hollow offset-focus light formed after reflection of the annular off-axis parabolic focus lens, and a collimation protection gas sleeve is arranged on the periphery of the powder spraying pipe. The annular off-axis parabolic focus lens is used for horizontally shifting the focusing focus of the maternal parabola. According to the annular hollow offset-focus laser cladding device, the homogenization of the energy density of an annular light spot is realized, the coupling effect of a laser beam and powder is improved, the utilization rate of the metal powder is improved, and the cladding quality and appearance are improved.