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Laser splitting galvanometer scanning and processing device
ActiveCN103706946AQuick switchRich Spatial Trajectory ModulationLaser beam welding apparatusLaser processingLight beam
The invention relates to the field of laser processing, in particular to a laser splitting galvanometer scanning and processing device comprising a beam control module, a laser splitting module, and a galvanometer scanning and focusing module. The laser splitting module is capable of processing a single laser beam into multiple laser beams, and the galvanometer scanning and focusing module is capable of switching laser focuses at high speed; by combining the two modules, high-speed efficient precision array laser processing is achieved; beam motion track control contents in laser processing can be further enriched by adding the beam control module, and the needs of various processing environments and various conditions are met. Compared to traditional laser processing, the laser splitting galvanometer scanning and processing device has the advantages that all aspects such as processing precision, processing efficiency and processing quality are greatly improved, the device adapts to the development trend of modern solid-state lasers and the device is widely applicable to the field of laser processing.
Owner:张立国
Method for shifting roles in netowrk games
ActiveCN1941788ASend less frequentlyReduce trafficData switching networksSpecial data processing applicationsTraffic capacityNetwork reduction
The method comprises: a) the local game end real-time decides if the moving route of local role varies; if yes, then determines the moving route of local role, and sends the moving message carrying the moving state and moving route of local role to the remote game terminal; b) the remote game end controls the remote role corresponding to the local role to move according to the moving state and moving route in the received moving message. By the invention, the network traffic flow for on-line game can be reduced.
Owner:TENCENT TECH (SHENZHEN) CO LTD
Paper-based microfluidic chip and preparation method thereof
The invention discloses a paper-based microfluidic chip. The paper-based microfluidic chip comprises a paper-based chip and a paper-based substrate, wherein the paper-based chip is provided with a microfluidic channel, the paper-based substrate is correspondingly adhered to the bottom of the paper-based chip, and the paper-based chip and the paper-based substrate are respectively subjected to cross-linking and solidifying treatment through liquid glue. The invention also discloses a three-dimensional paper-based microfluidic chip which is formed by stretching or folding the paper-based microfluidic chip. The paper-based microfluidic chip disclosed by the invention has the advantages of low cost, easiness in preparation, controllable liquid flow and the like, and is applicable to microfluidic analysis experiments.
Owner:GUANGDONG XIAN JIAOTONG UNIV ACADEMY +1
Trigonometric function acceleration and deceleration control method for high-quality machining
InactiveCN106647637AHigh processing flexibilityIncrease smoothnessNumerical controlMachiningAcceleration Unit
The invention relates to a trigonometric function acceleration and deceleration control method for high-quality machining. The method comprises a pre-interpolation stage and a real-time spline interpolation stage. In the preprocessing stage, a path to be machined is quickly interpolated, key information is recorded, and the trigonometric function speed equation in each acceleration and deceleration section is calculated. In the real-time spline interpolation stage, the real-time feed rate of a cutter is calculated according to the recorded information and the speed equations in the preprocessing stage, and then, next interpolation parameter is calculated in real time using a Newton iteration method, and real-time spline interpolation is carried out. The method is simple in control. Continuous change of speed, acceleration and jerk in the process of machining is realized, and fluctuation in feed rate is reduced. Therefore, the machining precision is guaranteed, overshoot caused by high-speed machining is eased, and flexible acceleration and deceleration control on a servo shaft is achieved. The method is suitable for high-quality processing.
Owner:中国科学院沈阳计算技术研究所有限公司
Strengthened organic glass window for cellphone and manufacture method of window
ActiveCN103738008AHigh hardnessHigh light transmittanceGlass/slag layered productsTelephone set constructionsTransmittanceHardness
The invention discloses a strengthened organic glass window for a cellphone. The strengthening organic glass window comprises an organic glass lens, wherein the organic glass lens comprises a base plate and a strengthening layer which is used for carrying out chemical strengthening treatment on the outer surface of the base plate; the inner surface of the base plate is coated with a decorating layer, and the outer surface of the strengthening layer is coated with a first vacuum electroplated layer. The invention also discloses a manufacture method of the strengthening organic glass window for the cellphone. The strengthening organic glass window disclosed by the invention has the advantages that the outer surface of a window lens strengthening layer is coated with the vacuum electroplated layer, and the hardness, smooth degree and light transmittance of the surface of the window can be effectively improved.
Owner:DONGGUAN HUAQING OPTICAL TECH
Cutting machine for foamed concrete blocks
InactiveCN102601855AAvoid cross interferenceThe overall structure is simpleCeramic shaping apparatusStructural engineeringMechanical engineering
The invention discloses a cutting machine for foamed concrete blocks, which comprises a rectangular frame and a cutting device. Four guide columns are vertically arranged at four corners of the rectangular frame. The cutting machine is characterized in that the cutting device comprises a transverse cutting mechanism and a vertical cutting mechanism. Compared with the prior art, the cutting machine has the advantages that the transverse cutting mechanism and the vertical cutting mechanism are separately arranged, so that cross interference can be well avoided. Further, since the transverse cutting mechanism and the vertical cutting mechanism are both obtained by basically identical structures, the integral structure is relatively simple, implementation is convenient, and implementation cost is low. Transverse cutting and longitudinal cutting are operated separately, a travelling mechanism drives a cutting wire to reciprocate for extruding cutting during reciprocated friction, and accordingly cutting resistance is greatly reduced while energy loss is reduced. More importantly, smoothness in cutting is improved, concrete blank disintegration is avoided, cutting success rate is greatly increased, and product scrappage is decreased.
Owner:重庆市旌弘建材有限公司
Textile multicomponent enhancement structure-gradually degradable ureteral stent tube and preparation method thereof
The invention relates to a textile multicomponent enhancement structure-gradually gradable ureteral stent tube and a preparation method thereof. The textile-based ureteral stent tube is characterized by comprising a film phase and a fiber phase containing different components, wherein the film phase and the fiber phase are mutually mixed, the mechanical property is enhanced, and the two phases are gradually degraded. The preparation method is characterized by comprising the following steps of: weaving at least two degradable fibrous raw materials with different melting temperatures on a core mold by a weaving structure mixed by different configuration, and melting the components with low melting point in the tube wall fiber materials into film by virtue of temperature in a thermal treatment technology, so that the other fiber components in the tube wall can be tightly and evenly combined to enhance the tube wall of the weaving tube. The ureteral stent tube is simple to prepare, has the excellent axial tensile property and flexibility of a fiber stent, and the excellent mechanical supporting performance of a film material stent tube, and can realize the gradual degraded steps of the film and the fiber successively; and a degradation product is less than 0.1mm<3>.
Owner:DONGHUA UNIV +1
Method for synchronization of audio frequency and video frequency of stream media terminal
InactiveCN101207822AShort initial delayImprove fluencyPulse modulation television signal transmissionReal-time computingAudio frequency
A synchronizing method of audiovideo of a streaming media terminal comprises the steps that: S1, input data is carried through the processing of buffering and memorizing; S2, input data frames of video are carried through the processing of skip; S3, a playing process is operated synchronously. The invention has the advantages that: the initial delay of a user is short and the fluency is high when in the process of playing.
Owner:SHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD
3D printing equipment with multiple feeding tubes
InactiveCN105128330AReduce vibrationIncrease manufacturing costAdditive manufacturing apparatusColor printingSpray nozzle
The invention discloses 3D printing equipment with multiple feeding tubes. The 3D printing equipment comprises a mounting rack, a vertical moving mechanism, a horizontal moving mechanism, a printing head and a printing supporting mechanism, wherein the vertical moving mechanism comprises a first drive device, a lifting rod, a mounting plate and a positioning rod; the horizontal moving mechanism comprises a horizontal moving rod and a second drive mechanism; the printing head comprises a plurality of heating devices, a heat insulating device, a radiating device, a spray head, a spray nozzle and a plurality of feeding tubes; the heat insulating device is mounted above the heating devices; the radiating device is mounted above the heat insulating device; a feeding device is mounted at the upper ends of the feeding tubes; a closing valve is arranged on positions, corresponding to communication positions of the feeding tubes and the spray head, in the spray nozzle; the spray nozzle is detachably mounted at the lower end of the spray nozzle; and the printing supporting mechanism comprises a third drive device and a printing base. The 3D practical equipment with multiple feeding tubes can reduce vibration in a printing process, and can carry out color printing.
Owner:WUHU SIRUIDI THREE DIMENSIONAL TECH CO LTD
Electrohydraulic servo pressure-torque coupling three-way vibration loading tree-axis instrument
InactiveCN1776402AImprove mutual interferenceIncrease smoothnessUsing mechanical meansStrength propertiesAutomatic controlControl system
The triaxial apparatus includes three portions: host; hydraulic power source connected to servo valve for loading electrohydraulic in three directions in host through pipe; automatic control system connected to the input signal measured by sensor as well as connected to electrical signal output from servo valve. The host includes pressure chamber, axle load mechanism, twist mechanism connected to the axle load mechanism in coaxial coupling, pressing-twisting mechanism between the pressure chamber and twist mechanism, balance-cylinder and side pressure mechanism. The balance-cylinder, side pressure mechanism and pressure chamber are connected through pipe so as to constitute self-balanced mechanism of hydraulic pressure. The invention overcomes interactional movement between axle load mechanism and twist mechanism of current triaxial apparatus of vibration and torison shear as well as overcomes disadvantages of side pressure mechanism. Features are: smooth waveform of load, and low cost.
Owner:XIAN UNIV OF TECH
Method and device for processing surface of flux-cored welding wire during drawing flux-cored welding wire
InactiveCN101708570AGood surface treatmentImproved arc stabilityWelding/cutting media/materialsSoldering mediaArc stabilitySurface cleaning
Owner:WUHAN TEMO WELDING CONSUMABLES CO LTD
Laser beam splitting and processing device
ActiveCN103658975AFast focus switching High precision focus switching capabilityImprove processing efficiencyLaser beam welding apparatusProcessing accuracyBeam steering
The invention relates to the field of laser processing, in particular to a laser beam splitting and processing device. The laser beam splitting and processing device comprises a laser focusing and switching module, a laser splitting module and a beam steering module. The laser splitting module can process a single laser into multiple lasers, the laser focusing and switching module can focus lasers and switch spatial space of laser focal points at a high speed, and through combination of the laser splitting module and the laser focusing and switching module, array laser processing with high speed, efficiency and accuracy is realized; through the beam steering module, control content of beam movement trajectories during laser processing is further enriched, and requirements on various processing environments and processing conditions can be met. Compared with conventional laser processing devices, the laser beam splitting and processing device has the advantages that processing accuracy, processing efficiency, processing quality and the like are greatly improved, and the laser beam splitting and processing device adapts to the development trend of modern solid-sate lasers and can be widely applied to the field of laser processing.
Owner:张立国
Anti-fingerprint coating liquid and anti-fingerprint hardening film
ActiveCN106433411AImprove the level ofIncrease smoothnessEpoxy resin coatingsOrganic solventFluoride
The invention provides an anti-fingerprint coating liquid and an anti-fingerprint hardening film. The anti-fingerprint coating liquid is prepared from components, in percentage by weight, 20%-50% of fluorine-containing acrylic acid prepolymers, 10%-40% of matrix resin, 1%-5% of a photoinitiator and 30%-50% of an organic solvent. The components of the anti-fingerprint coating liquid are limited in the content range, the fluorine-containing acrylic acid prepolymers can be rapidly subjected to a polymerization reaction under the action of the photoinitiator through UV illumination, fluoride elements float on the surface of the matrix resin, the fluorine-containing aid is added to improve the content of the fluoride elements on the surface and improve the levelling property of the coating liquid, after the anti-fingerprint coating liquid is cured to form an anti-fingerprint coating, the smooth degree and the wear resistance of the surface of the anti-fingerprint coating can be improved, and the anti-fingerprint coating has better hydrophobic performance.
Owner:ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
Method for smoothing self-regulation totality variation image base on edge confidence degree
The invention provides a self-adjustment entire variational image smoothing method based on edge confidence level, is an entire variational image smoothing method containing self-adjustment factors; in the treatment process, based on a common image de-noising algorithm and an entire variational algorithm, a self-adjustment factor p function is added, thus realizing that smoothness level of local regions is ensured according to image local messages. The method can remove the noise and overcomplicated texture messages on the premise of better keeping the image edge, thus being capable of effectively overcoming the disadvantages of slow de-noising speed caused by an entire variational de-noising model, staircase effect produced in the diffusion process and noise missing which is caused easily. By using the method, the smoothness treatment is carried out on images with low signal-to-noise ratio; under the background of stronger noise, the noise and superfluous texture messages can be removed on the premise of keeping the region edges of interest.
Owner:HARBIN INST OF TECH
Live video transmission control method and system based on PID control
ActiveCN107154918AAchieve adaptiveIncrease smoothnessTransmissionSelective content distributionVideo transmissionNetwork conditions
The invention a live video transmission control method and system based on PID control. The live video transmission control method based on PID control comprises the following steps of according to a preset detecting cycle, detecting real-time bit rate of the system and real-time length of a video transmission buffer zone, wherein the real-time length of the video transmission buffer zone represents the number of buffered video frames; calculating the difference value between the real-time length and a target value of the length of the video transmission buffer zone; bringing the difference value into a PID control formula and performing calculation so as to obtain a bit rate adjustment value which is required at the current moment; and according to the bit rate adjustment value, adjusting the real-time bit rate. Through the adoption of the technical scheme of the control method disclosed by the invention, the real-time bit rate can be corrected, so that the data volume of the video transmission buffer zone is maintained to be an ideal state, so that self-adaption of video quality along with the network condition is realized; and the fluent degree of live video is increased, and network bandwidth is sufficiently used as possible, so that high video quality can be achieved.
Owner:PEKING UNIV +2
Gamma curve adjusting method and device of TFT-LCD
ActiveCN103761945AGuaranteed accuracyIncrease smoothnessStatic indicating devicesGray levelComputer science
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
Multifunctional adjustable desk
InactiveCN109276025AIncrease anti-slip effectPlay a massage roleRoller massageVariable height tablesFixed frameEngineering
The invention provides a multifunctional adjustable desk. The multifunctional adjustable desk comprises longitudinal supporting pipes, fixing bolts, adjustable mounting underframe structures, adjustable fixing frame structures, buffer massage frame structures, an adjustable writing backing plate structure, a desk plate, a material storage frame, a left storage frame, a left insertion bucket, a left handle, a right storage frame, a right insertion bucket, a right handle and a classification partition plate, wherein the longitudinal supporting pipes are mounted at the four corners of the lower part of the material storage frame in a bolted mode. The arrangement of massage balls is beneficial to massage legs of a user when the multifunctional adjustable desk is used. Jacking bolts penetrate through longitudinal adjusting grooves and are in threaded connection with fixing plates, so that the height of the fixing plates at the inner side of longitudinal adjusting side plates is adjusted, and the height of the buffer massage frame structures is adjusted conveniently. Angle adjusting supporting rods are separately and axially connected to the left and right sides of the rear end of the lower part of a writing board, so that the adjustment of inclination angle of the angle adjusting supporting rods at the lower part of the writing board is facilitated, and the inclination angle of thewriting board is further conveniently adjusted.
Owner:SHANDONG POLYTECHNIC
Method for preparing integrated molecular sieve blocks on basis of 3D printing technology
PendingCN109160800AHigh mechanical strengthHigh porosityAdditive manufacturing apparatusMolecular sieve catalystsFiberMolecular sieve
The invention discloses a method for preparing integrated molecular blocks on basis of a 3D printing technology, and belongs to the field of molecular sieve type adsorbent or catalyst processing. Themethod comprises the following steps of: (1) uniformly mixing a molecular sieve body with an inorganic binder, an inorganic fiber, an organic shaping auxiliary, a pore forming agent and water so as toconfigure a pasty mixture; (2) carrying out ultrasonic treatment on the pasty mixture; (3) designing a printing program; (4) printing molecular sieve blocks by utilizing a 3D printer; and (5) carrying out low-temperature aging shaping and high-temperature roasting. According to the method, the 3D printing technology is applied to intelligent preparation of molecular sieve type bodies for the time, so that the method has the advantages of being simple to operate, low in cost and high in material utilization rate; and the molecular sieve blocks have the advantages of being wear-resistant, highin mechanical strength, developed in pores, uniform in micropore-mesopore-macropore grade pore structure, small in pressure reduction and high in mass transfer rate, and is suitable for processing various molecular sieve adsorbents and catalysts.
Owner:JILIN UNIV
Production technology of mini-jacquard weft elastic yarn-dyed fabric made of aloe fiber
ActiveCN104947285AColors are bright without being flashyRaise the gradeSingeingSeaming textilesFiberYarn
The invention discloses a production technology of mini-jacquard weft elastic yarn-dyed fabric made of aloe fiber. The production technology comprises steps as follows: winding, warping, sizing, weaving and finishing, wherein the finishing comprises steps as follows: fabric inspection, fabric turning, sewing, singeing, desizing, setting, preshrinking and plaiting. The specification, the style and the dyed yarn arrangement of the mini-jacquard weft elastic yarn-dyed fabric made of the aloe fiber are designed, winding, warping, sizing, weaving and finishing processes are optimized, the production efficiency is up to 92%, and the rate of first-grade goods put in storage is up to 98%.
Owner:IANGSU COLLEGE OF ENG & TECH
Iron-based composite powder high in chromium content for laser cladding
ActiveCN103752818AHigh hardnessImprove wear resistanceMetallic material coating processesCrack freeHardness
The invention discloses iron-based composite powder high in chromium content for laser cladding. The iron-based composite powder high in chromium content for laser cladding is composed of the chemical compound of Cr3C2, Cr and Fe, Ni, Mo, Si and B. The iron-based composite powder high in chromium content for laser cladding comprises, by mass, 38%-40% of Cr, 4.2%-4.5% of C, 3%-5% of Ni, 0.05%-0.08% of Mo, 0.8%-1.02% of Si, 1.2%-1.78% of B and the balance Fe. The particle size of the iron-based composite powder is between +140 meshes and -325 meshes. The iron-based composite powder is high in carbon content and chromium content, the hardness of a coating can be effectively improved, requirements of the laser cladding technology of iron-based base materials such as carbon steel and stainless steel can be met, a cladding layer of a sample of the iron-based composite powder is free of cracks and macroscopic pores, all the components are distributed evenly, the hardness of the iron-based composite powder can reach HV0.21000 and is five times that of a base body, the corrosion resistance of the iron-based composite powder cladding layer is improved due to the high chromium content, and the iron-based composite powder is suitable for normal temperature, high temperature, abrasion resistance and corrosion resistance working conditions.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Seven-freedom-degree mechanical arm control method and system based on analytical solution
ActiveCN109397292APath planning results are smoothImprove stabilityProgramme-controlled manipulatorAngular degreesEngineering
The invention discloses a seven-freedom-degree mechanical arm control method and system based on analytical solution. The system comprises a seven-freedom-degree mechanical arm and a control module; the seven-freedom-degree mechanical arm is in communication connection with the control module; axes of three adjacent joint motors in the seven-freedom-degree mechanical arm are crossed on the point,axes of two adjacent motor joints are perpendicular, the control module is used for carrying out inverse kinematics solution on the seven-freedom-degree mechanical arm based on the analytical solution, the joint angle of each joint motor in the seven-freedom-degree mechanical arm is obtained, on the basis of the joint angle, path planning is carried out, multiple path points from the starting point of the seven-freedom-degree mechanical arm to the target point are obtained, interpolation calculation is carried among the multiple path points, the motion track of the seven-freedom-degree mechanical arm is obtained, each joint motor is subjected to trajectory tracking, and motion of the seven-freedom-degree mechanical arm is controlled in real time. The solution speed is high, and the smoothdegree of path planning by the multi-freedom-degree mechanical arm in the complex environment can be improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Glazed tile prepared from black soil
The invention relates to glazed tile prepared from black soil. The green body of the glazed tile comprises black soil, magnesium aluminate spinel, potash feldspar, quartz, magnesium carbonate, steel fiber, phenol formaldehyde resin, starch and rice hull; glaze of the glazed tile comprises iron oxide yellow, cobaltous oxide, feldspar powder, nano-zinc oxide, silicon nitride, carbon fiber, stannic oxide, TEOS and polytetrafluoroethylene. The glazed tile is smooth and clean in surface and bright in color, has good properties of crush resistance, fire resistance and acid and alkali resistance, and is light in mass, low in water absorption, good in breathability and low in cost.
Owner:衢州市圣宝建材有限公司
Health-care wine
InactiveCN101125169AImprove memory lossSignificant ability to repair and regenerateDigestive systemAlcoholic beverage preparationForest yamWolfiporia extensa
The present invention relates to a health care wine, in particular to a health care wire which contains the traditional Chinese medicine for nourishing yin, the existing health care wines are mostly the wines for strengthening yang, which can cause the imbalance between yin and yang by excessive drinking; China has a word that yang mainly controls the organs and yin mainly controls body fluids, the excess of yang often causes qi stagnation and blood stasis, so as to cause cardiovascular diseases, hearing loss, memory impairment and alopecia. The components of the present invention include: beverage wine, each 1000 parts by weight of the beverage wine is added with 30 parts of radix rehmanniae glutinosae, 30 parts of radix rehmanniae preparata, 20 parts of common yam rhizome, 20 parts of common macrocarpium fruit, 20 parts of barbary wolfberry fruit, 15 parts of glossy privet fruit, 15 parts of tree peony bark, 20 parts of hawthorn fruit, 30 parts of tuber fleeceflower root, 30 parts of salvia, 30 parts of membranous milkvetch root, 20 parts of Chinese magnoliavine fruit, 15 parts of oriental waterplantain rhizome, 15 parts of Indian buead and 15 parts of kudzuvine root, and all the components are soaked for 25 to 40 days and then the wastes are removed. The product can be used as the health care wine for the treatment of age related hearing loss, alopecia, bad memory and the improvement of the cardiovascular adverse states.
Owner:孙景荣
Data optimization processing method for star sensor
ActiveCN106289238AImprove signal-to-noise ratioEliminate noise errorsNavigational calculation instrumentsNavigation by speed/acceleration measurementsSignal-to-noise ratio (imaging)Filtration
The invention provides a data optimization processing method for a star sensor, and belongs to the technical field of a data optimization processing method. The method can be used for treating data measured by a star sensor and improving the stability and precision of the output attitude of the star sensor. The method mainly used for improved transition, extraction, interpolation and filtration of data measured by the star sensor, optimization processing of data output by the star sensor through a wavelet analysis method using Allan variance fusion, and improvement of the stability and precision of the output attitude of the star sensor. The method has main advantages that: 1) outliers can be accurately removed, and the error redundancy is improved; 2) the low-frequency tendency is smoothed and eliminated and the anti-interference performance is improved; 3) data is kept continuous and evenly spaced, and the stability of the output attitude is improved; 4) noise of internal work and observation environment is inhibited, and the signal-to-noise ratio is effectively increased; and 5) the precision of the output attitude information of the star sensor is improved.
Owner:HARBIN INST OF TECH
Petroleum bit matrix powder
ActiveCN101596593AImprove mechanical propertiesImproved wear and erosion resistancePetroleumDrill bit
The invention discloses a petroleum bit matrix powder and is characterized in that the matrix powder comprises the following components by weight percent; 25-75% of cast tungsten carbide powder with a particle size of 65-400 meshes, 10-60% of alloy tungsten carbide powder with a particle size of 65-400 meshes, 10-40% of Ni-based alloy powder with a particle size of 100-325 meshes and 2-8% of nickel powder with a particle size of 5-15 micron. Mechanical property tests of the matrix powder prepared by the invention show that the bending strength of the matrix powder is increased by 30-40% compared with that of the traditional matrix powder, the impact toughness thereof is increased by 3-4 times than that of the traditional matrix powder, and the abrasion resistance and erosion resistance thereof is increased by 5-10% compared with that of the traditional matrix powder.
Owner:SICHUAN DEEP & FAST OIL DRILLING TOOLS CO LTD
Obstetrics and gynecology delivery auxiliary device
InactiveCN107930019AProper exercisePain reliefMovement coordination devicesCardiovascular exercising devicesObstetric historyEngineering
The invention discloses a childbirth auxiliary device for obstetrics and gynecology, which comprises a base. One end of the base is provided with a chute. The inner side of the chute is slidably connected with a slider. The upper surface of the positioning plate is axially connected with a pedal, the lower surface of the pedal is fixedly connected with the first spring, the lower end of the first spring is fixedly connected with the upper surface of the base, and the upper surface of the pedal is fixedly connected with a heel pad. The birth assisting device for obstetrics and gynecology can effectively allow pregnant women to exercise properly before giving birth, relieve the pain of the baby falling in the uterus, and at the same time improve the smoothness of delivery.
Owner:严松奎
Sinusoidal doubly-salient motor with trapezoid rotor tooth structure and design method of sinusoidal doubly-salient motor
ActiveCN104578491AAchieving Back-EMF SinusoidalizationIncrease smoothnessMagnetic circuit rotating partsEngineeringThree-phase
The invention discloses a sinusoidal doubly-salient motor with a trapezoid rotor tooth structure and a design method of the sinusoidal doubly-salient motor. The sinusoidal doubly-salient motor is composed of stators and rotors. The stators and the rotors are both of a salient pole tooth groove structure. The number of stator teeth and the number of rotor teeth meet the relation of 6 / 4N, wherein N=1, 2, 3...; stator tooth grooves are identical in width, armature windings and exciting windings (or magnetic steel) are embedded in the stator tooth grooves, and the rotors are of the trapezoid tooth structure and are distributed in a lateral symmetric mode. The design method is used for optimizing the widths of the rotor teeth and the widths of rotor tooth grooves, the widths of the narrow sides of the rotor teeth are equal to those of the stator teeth, the widths of the wide sides of the rotor teeth are twice those of the stator teeth, and the optimal trapezoid wave rotor tooth structure is formed. Under the exciting of the exciting windings or the magnetic steel, in the rotating process of the rotor teeth, sinusoidal counter potential waveforms are sensed in three-phase armature windings of the stators of the doubly-salient motor.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Trigonometric function speed planning method used for spline interpolation
InactiveCN105629882AReduce the number of mutationsHigh processing flexibilityNumerical controlNumerical controlArray data structure
The present invention relates to a trigonometric function speed planning method applied to spline interpolation and divided into the pre-interpolation and the real-time spline interpolation. The pre-interpolation is characterized by carrying out the rapid pre-interpolation on a to-be-processed curve, collecting the acceleration / deceleration starting points and the information of the speed maximum / minimum value points on the processed curve, then calculating a sped equation of each acceleration / deceleration segment, and saving in an acceleration / deceleration array. A real-time spline interpolation stage is characterized by firstly calculating the real-time feed speed of a cutter according to the acceleration / deceleration beginning and end parameters and the speed equations in the acceleration / deceleration array, then adopting a two-order Taylor expansion to calculate the next real-time interpolation parameter real-timelyto carry out the real-time spline interpolation. The method of the present invention is simple to control, can guarantee the processing accuracy, also can realize the continuous change of the speed and the acceleration during a high speed processing process of a numerical control machine tool, and enables the mutation frequency of the jerk to be reduced, thereby relieving the overshoot generated by the high speed processing, and realizing the flexible acceleration / deceleration control of a servo shaft.
Owner:中国科学院沈阳计算技术研究所有限公司
Flame-retardant microcapsule phase-change material
InactiveCN105112020AWon't happenNot volatileHeat-exchange elementsMicroballoon preparationBenzoyl peroxideSolvent
The invention relates to a flame-retardant microcapsule phase-change material. The flame-retardant microcapsule phase-change material is prepared from a core material, a flame-retardant wall material, an emulsifier, benzoyl peroxide (BPO) and deionized water, wherein the core material is fatty acid ester, the flame-retardant wall material is a crosslinking polymer of reactive phosphonate monomer and tetramethylol methane tetraacrylate, and the emulsifier is a mixture of nonionic surfactant and ionic surfactant. The flame-retardant microcapsule phase-change material provided by the invention has excellent performance and is safe and environment-friendly; since reactive phosphonate-modified acid ester polymer is used as the microcapsule wall material, good flame retardation effect, good water resistance and good solvent resistance are obtained, and reduction in phase change enthalpy of the phase-change material caused by an additive flame retardant can be avoided; and since aliphatic ester is used as a phase-change material, better thermal stability and chemical stability are obtained, and a heat release rate is lower.
Owner:NINGBO GREENTECH ENERGY SAVING TECH
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