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Blockchain-based big data analysis method and system
InactiveCN108509514ASave storage spaceAvoid too largeSpecial data processing applicationsBlockchainAnalysis method
The present invention discloses a blockchain-based big data analysis method and system, in order to solve the problem of low node participation efficiency caused by a large amount of data in a block in the prior art. The method comprises: determining the legitimacy of data by using a node and sending the legal data; receiving the legal data and writing the legal data to the blockchain; synchronizing the blockchain by using the node and obtaining legal data; and writing the legal data into the blockchain, wherein the legal data is written into the blockchain in an index form. According to embodiments of the present invention, the data is written into the blockchain in an index form, the storage space of the data in the block is reduced, the storage space is saved from the data source, a large amount of data in the block is avoided, and the node participation efficiency is improved; and the technical scheme of the present invention is applicable to the field of big data.
Owner:史玉成
CNC comprehensive machining dust suction nozzle
ActiveCN106217114ARealize cleanup and recyclingAvoid scratchesMaintainance and safety accessoriesMachiningAirflow
The invention discloses a CNC comprehensive machining dust suction nozzle. The dust suction nozzle comprises a CNC machine head assembly, a cutter handle used for machining is arranged on the lower portion of the CNC machine head assembly, a dust suction device assembly is further arranged on the CNC machine head assembly, and a dust suction nozzle assembly is arranged on the dust suction device assembly; through rotation and vertical adjusting of the dust suction nozzle assembly, comprehensive sweep clearing and recycling can be achieved; the dust suction nozzle is high in efficiency, in the process of workpiece machining, sweeps are generated along with rotation of a cutter, a rotation airflow is added on the dust suction nozzle and is opposite to the rotation direction of the cutter, the sweeps are gathered towards the center position of a dust suction opening, and the dust removal, sweep removal and recycling efficiency is greatly improved.
Owner:西安精雕精密机械工程有限公司
Motor rotor iron core, motor rotor, motor and washing machine
PendingCN107968497AConditions that affect the uniformity of the air gapGuaranteed roundnessMagnetic circuit rotating partsMechanical energy handlingPunchingRadial position
The invention provides a motor rotor iron core, a motor rotor, a motor and a washing machine. The motor rotor iron core (1) is formed by successive connection and winding of a plurality of bar-shapedpunching sheets (2); when the multiple bar-shaped punching sheets (2) are unfolded, a notch (3) is formed between each two adjacent bar-shaped punching sheets (2), so that the plurality of bar-shapedpunching sheets (2) are bent in a winding state to form a circular ring structure so as to accommodate a magnet in the circular ring structure. Therefore, the plurality of bar-shaped punching sheets with notches are bent to form the circular structure to form a cylindrical rotor iron core by winding moulding, so that the roundness of the rotor iron core is ensured and natural centering of the rotor is realized; and thus a phenomenon that the gas gap uniformity of the motor is affected by different radial positions of permanent magnets is avoided.
Owner:ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
Resistivity measurement method of rock and ore specimen
ActiveCN104181394AAvoid direct measurementAvoid too largeResistance/reactance/impedenceElectrical resistance and conductanceElectric resistivity
Provided is a resistivity measurement method of a rock and ore specimen. One end of a resistance box is connected with one end of the rock and ore specimen, and a given voltage is applied between the other end of the resistance box and the other end of the rock and ore specimen. First, the resistance of the resistance box is adjusted to be a large value, the resistance box is ensured to be passed through a safe supply current even the resistivity of the rock and ore specimen is low under the given supply voltage, if the current passing through the resistance box is large, the resistance R1 of the resistance box is increased, then U1 and U2 are measured again, and R2 and the resistivity are calculated. According to the invention, direct measurement of the current is prevented, and high-precision measurement of the current is realized through measuring the voltage of a high-precision resistor loaded on the resistance box, hence the problem that the current is too large or too small to measure caused by the measurement current directly though an ammeter is prevented.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Hydroelectric generating set multi-dimensional vibration area fine division method based on decision tree model
InactiveCN111092442AAvoid too largeAvoid the situationSingle network parallel feeding arrangementsPower oscillations reduction/preventionData informationMonitoring system
The invention provides a hydroelectric generating set multi-dimensional vibration area fine division method based on a decision-making tree model. The method comprises steps of S1, obtaining a workingcondition parameter and a stability parameter of a set state monitoring system, and carrying out data cleaning, S2, determining a unit stability parameter threshold, S3, constructing a judgment matrix and dividing the judgment matrix into a training set and a test set, S4, establishing a decision tree model by using the training set, and S5, completing a precision test by using the test set, andsubstituting the precision test into the decision tree model to predict whether the new working condition belongs to the vibration area. The method is advantaged in that a big data mode is adopted, unit state on-line monitoring system data is fully utilized, the effective data information is mined, the effective data information is applied to unit vibration area full-water-head fine division, a problem of predicting whether uncovered data points are located in the vibration area or not is solved, and the method considers multi-dimensional working conditions, and improves accuracy of the vibration area division model of the unit based on big data mining.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER +1
Superpixel-level feature extraction method based on spatial pyramid pooling
ActiveCN108875798AAvoid too largeAvoid problems with being too smallCharacter and pattern recognitionModel extractionImaging processing
The invention relates to a radar image processing and interpretation technology, and in particular relates to a feature extraction method used for extracting superpixel-level features of a polarization SAR (Synthetic Aperture Radar) image. According to the method in the invention, the superpixel-level features of the polarization SAR image are extracted by utilization of a spatial pyramid poolingmodel; all scales of features of various feature layers in a superpixel block can be connected in series, so that overall features of the superpixel block are obtained; the superpixel-level feature extraction time is greatly reduced; requirements on a classifier are reduced; and a polarization SAR image classification result is improved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Residual current detection and correction device, detection method and electrical fire monitoring system
PendingCN111122956AHigh precisionImprove securityCurrent/voltage measurementFire alarm electric actuationData processing systemData acquisition
The invention provides a residual current detection and correction device, a detection method and an electrical fire monitoring system. The residual current detection and correction device comprises adetector and an upper computer. The data acquisition system is connected to the upper computer, the data acquisition system can be used for detecting and recording correction parameters under the influence of external factors, and the correction system is used for determining correction values according to the correction parameters recorded by the detector under the influence of the external factors; the correction system is connected to a data processing system, the data acquisition system is connected to the data processing system, and the data processing system is used for calculating a residual current actual output value according to a real-time residual current value detected by the data acquisition system and a correction value of the correction system. According to the residual current detection and correction device provided by the invention, the correction parameters acquired by the detector are sent to the upper computer, the correction system calculates a correction valueand feeds back the correction value to the detector, and the detector calculates the residual current actual output value, so that the situations of false alarm and missing alarm are avoided, and thesafety of an electrical fire monitoring system is improved.
Owner:天津市中力神盾电子科技有限公司
Method for determining thickness of edge wall treatment layer in coarse-grained soil permeation test
ActiveCN109297881AReliable permeability test basisEliminate sidewall effectsPermeability/surface area analysisVoid ratioParticle density
The invention discloses a method for determining the thickness of an edge wall treatment layer in a coarse-grained soil permeation test. The method comprises the following steps: measuring the contentof each particle size group, the median size and the particle density of the coarse-grained soil through particle screening and particle density testing; calculating the representative particle sized of a sample; obtaining a plane void ratio correction coefficient [epsilon] under an actual void ratio e of the coarse-grained soil sample through a maximum dry density and minimum dry density test of the sample; calculating a stacking angle [alpha] of the equi-diameter circular packing model reflected in the plane; and finally, determining the thickness h of the edge wall treatment layer under condition of the diameter D of the permeameter. The method for determining the thickness of the edge wall treatment layer in the coarse-grained soil permeation test is clear in principle, and easy to operate and calculate; the thickness of the edge wall treatment layer can be accurately determined by means of the conventional indoor geotechnical test, thereby providing a reasonable thickness basisof the edge wall treatment layer for the coarse-grained soil permeation test.
Owner:SOUTHWEST JIAOTONG UNIV
Lithium ion battery pole piece preparation method
ActiveCN113437259AAvoid too largePrevent falling offSecondary cellsElectrode collector coatingPhysicsLithium electrode
The present invention provides a lithium ion battery pole piece preparation method, which comprises: 1) providing a current collector, and pasting a thermal shrinkage adhesive on the tab position of the current collector, the thermal shrinkage adhesive comprises a base material and an adhesive layer, and the adhesive layer comprises acrylic resin and a carbohydrate compound; 2) coating the active substance slurry on the surface of a current collector; (3) drying the diaphragm at the thermal shrinkage temperature of the thermal shrinkage adhesive, so that the thermal shrinkage adhesive shrinks and separates from the surface of the current collector with the active substance on the thermal shrinkage adhesive to form a blank area which is not coated with the active substance; and 4) fixing the tab on the blank area of the current collector to obtain the required pole piece. According to the invention, the active substance is stripped by the heat-shrinkable adhesive to form a blank area for welding the tab, the area of the current collector can be more fully utilized, the adhesive of the heat-shrinkable adhesive contains carbohydrates, the initial viscosity of the adhesive can be increased, and the adhesive hanging can be avoided after heating; and the lithium ion battery prepared by using the pole piece has lower battery internal resistance and higher volume energy density.
Owner:HIGHPOWER TECH HUIZHOU
Method for detecting power grid false data injection attacks
InactiveCN111031064AAvoid too largeSmall amount of calculationCharacter and pattern recognitionNeural architecturesDeep neural networksWavelet transform
The invention discloses a method for detecting power grid false data injection attacks. The method comprises the following steps of: calculating to obtain a system running state estimation value according to data acquired by a power grid terminal, extracting time-frequency characteristic data of each time period from the state estimation value by using wavelet transform, and inputting the time-frequency characteristic data into a deep neural network to classify whether false data injection attacks exist or not, and outputting a detection result. The method can be directly used for detecting the state estimation result of the power system, and the detection result can indicate whether the state estimation of the power system is affected by false data injection attacks or not.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO +1
Magnetic core and applicable magnetic element of magnetic core
InactiveCN104252951ASmall diameterSave space for windingTransformers/inductances magnetic coresInductance with magnetic coreLong axisSafety specification
The invention discloses a magnetic core and an applicable magnetic element of the magnetic core. The magnetic core at least comprises an oval center post and two side posts, wherein the oval center post is provided with a long shaft and a short shaft; the length of the long shaft is greater than that of the short shaft; the two side posts are oppositely arranged at two sides of the oval center post, are connected with the oval center post, and define at least one winding space together with the oval center post. Through the arrangement of the oval center post, the magnetic core has the advantages that the winding space is enlarged, the diameter of a wining coil is increased, the temperature of a winding solenoid is lowered, the winding solenoid is prevented from being oversize, and the safety distance between the winding solenoid and a reel is increased to accord with the safety specification.
Owner:DELTA ELECTRONICS INC
Ion beam irradiation apparatus, and ion beam current homogenization method
ActiveCN105609397AAchieve homogenizationAvoid too largeElectric discharge tubesA-weightingIon beam irradiation
The invention provides an ion beam irradiation apparatus (100), being able to perform homogenization of beam current with good stability in a short time. In the uniform control step of homogenization of beam current, the control device performs the steps: a weighting coefficient calculation step: calculating the weighting coefficient that the influence degree of change of each filament current (IF) on each beam current (IB); and a filament theoretical current calculation step: calculating a theoretical current value, approaching the specific targetcurrent value, of each filament for each beam current (IB) according to the weighting coefficient obtained in the weighting coefficient calculation step.
Owner:NISSIN ION EQUIP CO LTD
Double-self-locking stroke continuously adjustable type high-precision micro-opening-distance foaming mold
The invention discloses a double-self-locking stroke continuously adjustable type high-precision micro-opening-distance foaming mold which comprises a bottom plate, a cushion block, an opening distance drive mechanism with a self-locking function, a lower mold base, a slide plate, a lower mold core, an upper mold base and an upper mold core, wherein the opening distance drive mechanism is arrangedon the bottom plate, and the output end of the opening distance drive mechanism is connected to a lifting plate; the lower mold base is arranged on the cushion block and provided with a mold guide column; the slide plate is correspondingly matched with a slide rod through a slide guide sleeve to be sleeved with the lower mold base in a sliding mode, one end of the slide rod is fixed to the slideplate, and the other end of the slide rod penetrates through the lower mold base and then is fixedly connected to a lifting plate; the lower mold core is fixed on the slide plate; the upper mold baseis correspondingly connected to the mold guide columns in a sliding and sleeved mode through the mold guide sleeve; the upper mold core is arranged in the upper mold base; and the lower mold base, thelower mold core, the upper mold base and the upper mold core are assembled to form a mold cavity; According to the invention, the lower mold core is ensured not to shift under injection molding pressure, and the defects of a low or overlarge foaming rate and out-of-tolerance product thickness are avoided.
Owner:昕致潮贸易(深圳)有限公司
Water purifier and method for decreasing TDS value of pure water
PendingCN110342667AAvoid too largeLow costTreatment involving filtrationMultistage water/sewage treatmentSolenoid valveReverse osmosis
The invention discloses a water purifier and method for decreasing the TDS value of pure water. The water purifier comprises a raw water inlet, a first reverse osmosis (RO) filter element and a composite filter element; a front filter element is arranged outside the composite filter element, and a second RO filter element is arranged inside the composite filter element; the raw water inlet is connected with a water inlet of a pressurizing pump, and the pressurizing pump is connected with the water inlet end of the first RO filter element through a first water inlet solenoid valve, and meanwhile connected with the water inlet end of the second RO filter element through a second water inlet solenoid valve; and the pure water end of the second RO filter element is connected to the water inletend of the first RO filter element through a second check valve, and a concentrated water outlet of the second RO filter element communicates with an outlet of the front filter element. The compositefilter element is constituted by the front filter element and the second RO filter element, the problems of an excessively large purifier body, cost suddenly-increasing and the like caused by additionally arranging the RO filter elements are avoided, the pure water produced by the second RO filter element is utilized to replace concentrated water in the first RO filter element, the problem of iondiffusion is solved, and thus the TDS of the pure water in the pure water end is not increased.
Owner:ZHEJIANG AIBOTE ENVIRONMENTAL TECH
Automatic electromagnetic valve adjusting circuit and method thereof
ActiveCN106594359APrevent excessive reverse current from burning the coilBurn out preventionOperating means/releasing devices for valvesPotentiometerElectricity
The invention relates to an automatic electromagnetic valve adjusting circuit and a method thereof. The automatic electromagnetic valve adjusting circuit comprises a coil K1 connected with a fuse FU1. The fuse FU1 is connected with a coil Y and a thyristor VS1. After a rectifier diode VD2 is connected with a resistor R1 and a resistor R2, the rectifier diode VD2 is connected with a resistor R3, a resistor R4 and a voltage stabilizing diode VD3. An audion VT1 is connected with the resistor R3 and connected with a capacitor C1 in parallel. A control loop of an electromagnetic valve is connected with a base electrode of the audion VT1 through a resistor R5 via a contact S1 and connected with a potentiometer R7. The potentiometer R7 is connected with the resistor R5, a resistor R6 and a capacitor C2 in series. One path of the audion VT1 is connected with the resistor R4, and the other path of the audion VT1 is connected with a trigger circuit of the thyristor VS1. A contact S2 is connected with 220VAC current and an electromagnetic valve Y. A coil K2 is connected with a controller B2 and a power source null line, and the coil K2 is connected with a +24V power source. The control loop of the circuit is completely separated from the power source and control of the electromagnetic valve, the situation that in the electromagnetic valve operation process, interference is caused to the controller due to overcurrent or reverse signals is avoided, and damage of the electromagnetic valve due to the sudden power getting or power losing is prevented.
Owner:SINO EURO MATERIALS TECH OF XIAN CO LTD
Rated pressure compression roller device
PendingCN111606121AAvoid uniformityAvoid too largeArticle deliveryWebs handlingClassical mechanicsThrust bearing
Owner:SHANGHAI XINAN CAR DEADENING FELT
Collar with double-gear adjusting structure for Zhongshan dress
The invention discloses a collar with a double-gear adjusting structure for a Zhongshan dress, and relates to the technical field of clothes accessories, in particular to the collar with the double-gear adjusting structure for the Zhongshan dress, which comprises a lapel and a collar stand integrally sewn and connected with the lapel, and the collar stand comprises a collar edge and a collar adjusting device. The collar adjusting device adopts two-gear type adjustment, the collar adjusting device comprises a first gear and a second gear, the first gear is an original collar line, and the second gear is to make a knife-shaped fold at the original collar of the first gear at one end of the collar edge and extend forwards by 0.8 cm to form another knife-shaped fold. The collar is provided with the two-gear type adjusting structure, namely the first gear and the second gear, the adjustable neck collar is suitable for neck collar requirements of different neck shapes, the problem that the existing neck collar is not comfortable is solved, the collar is made to be attached to the neck, the formal feeling of wearing is improved, the collar is made to be suitable for most neck shapes, and the problems that informal feeling caused by the fact that the collar of the garment is not suitable and cannot be buckled, and the costume is fit but the collar line is not fit are solved.
Owner:江苏卡思迪莱服饰有限公司
Collection equipment and collection process of aerosol powder equipment
The invention discloses collection equipment and a collection process of aerosol powder equipment. The equipment and the process have the beneficial effects that scrap metal is collected and guided into an electric heating furnace by means of a feeding structure, waste in the scrap metal is subjected to hot melting through electric hot melting, molten metal is cooled by means of a cooling annealing structure, cooled metal is annealed by means of an annealing furnace, the annealed metal is crushed, ground and vibrated to be screened through a crushing, grinding and vibrating screening structure, and metal powder with a size larger than a certain size is guided through vibrating screening, so that the phenomenon that the metal powder is too large, and stress is prone to occurring in the later machining process is avoided.
Owner:JIANGSU VILORY ADVANCED MATERIALS TECH CO LTD
Cloth and water distributor of flat plate filter and flat plate filter
PendingCN114470945AEasy to cleanRealize the buffering effectMoving filtering element filtersSlurryFilter material
The flat plate filter material and water distributor comprises a fixing frame, a plurality of feeding pipes, an overflow water tank, two lifting adjusting mechanisms, a first-stage baffle plate and a second-stage baffle plate, the two lifting adjusting mechanisms are located at the two ends of the overflow water tank respectively, and the overflow water tank is adjustably arranged below the fixing frame through the two lifting adjusting mechanisms; the top plate is provided with a plurality of through holes allowing the feeding pipes to penetrate from top to bottom, the overflow water tank is used for receiving slurry supplied by the feeding pipes and buffering the slurry, and the feeding pipes are provided with flow adjusting valves. By adjusting the flow of the feeding pipe and / or the lifting adjusting mechanism, the flow of each part of the material and water distributor can be flexibly adjusted in real time, and the inner and outer ring water quantity requirements of the flat plate filter can be met in time.
Owner:洛阳宝诺重型机械有限公司
Medical instrument and membrane suture method thereof
PendingCN113749698AGuarantee structureGuaranteed stabilityOcculdersBiomedical engineeringGeneral surgery
The invention relates to a medical instrument and a membrane suture method thereof. The membrane suture method comprises the following steps: a stent is coated with a covering membrane; the middle of a suture line penetrates through the stent at least four times and penetrates through the covering membrane at least one time to form a suture line coil, and a first line knot is tied to the fixed end and the movable end of the suture line; and the movable end of the suture line is pulled to move along the first line knot, so that the suture line coil is locked after the length of the suture line coil is adjusted. According to the membrane suture method, a slipknot (namely a first line knot) and a hard knot (namely a second line knot) are combined to coat the stent with the covering membrane, so that the suture tightness of the covering membrane on the stent can be controlled, and the defect that the length of the suture line coil cannot be adjusted after the hard knot is tied can be overcome; and the middle of the suture line penetrates through the stent at least four times and penetrates through the covering film at least one time, so that inaccurate adjustment of the suture line coil caused by deformation of the medical instrument due to overlarge stress can be avoided.
Owner:SHANGHAI ZUOXIN MEDICAL TECH CO LTD
A cnc all-round processing vacuum nozzle
ActiveCN106217114BRealize cleanup and recyclingAvoid scratchesMaintainance and safety accessoriesDust controlMachining
The invention discloses a CNC comprehensive machining dust suction nozzle. The dust suction nozzle comprises a CNC machine head assembly, a cutter handle used for machining is arranged on the lower portion of the CNC machine head assembly, a dust suction device assembly is further arranged on the CNC machine head assembly, and a dust suction nozzle assembly is arranged on the dust suction device assembly; through rotation and vertical adjusting of the dust suction nozzle assembly, comprehensive sweep clearing and recycling can be achieved; the dust suction nozzle is high in efficiency, in the process of workpiece machining, sweeps are generated along with rotation of a cutter, a rotation airflow is added on the dust suction nozzle and is opposite to the rotation direction of the cutter, the sweeps are gathered towards the center position of a dust suction opening, and the dust removal, sweep removal and recycling efficiency is greatly improved.
Owner:西安精雕精密机械工程有限公司
Anti-interference filtering method and device for high-precision household ultrasonic water meter
PendingCN113865659AAvoid large dataGood real-time performanceTesting/calibration apparatusVolume/mass flow measurementMeteorologyEngineering
The invention discloses an anti-interference filtering method for a high-precision household ultrasonic water meter. The method comprises the following steps of collecting the time difference signals of downstream and countercurrent when water is stopped, calculating the absolute values of slopes between the time difference signals of adjacent sampling points, calculating a mean value Kj average of the absolute values of the slopes of the time difference signals, selecting a proper judgment threshold value delta, if Kj average is smaller than delta, using the improved smoothing filtering, if Kj average is larger than delta, using the Kalman filtering, calculating a final time difference signal delta Tfinal filtered within the whole sampling time T, and adopting the delta Tfinal to participate in the calculation for compensating or offsetting non-zero flow. The high-precision household ultrasonic water meter adopts the anti-interference filtering method for the high-precision household ultrasonic water meter to carry out anti-interference filtering. By means of the method, the influence of interference of bubbles, zero drift, impurities and the like on the flow measurement in the using process of the household ultrasonic water meter can be effectively filtered out in real time, and the flow measurement error of the household ultrasonic water meter is reduced.
Owner:HUNAN WEIMING ENERGY TECH CO LTD
A method for determining the thickness of the side wall treatment layer in the penetration test of coarse-grained soil
ActiveCN109297881BReliable permeability test basisEliminate sidewall effectsPermeability/surface area analysisVoid ratioClassical mechanics
The invention discloses a method for determining the thickness of a side wall treatment layer in a coarse-grained soil penetration test. From the particle sieving and particle density test, the content of each particle size group, median particle size and particle density of coarse-grained soil are measured, and the representative particle size d of the sample is calculated; with the help of the maximum dry density and minimum dry density test of the sample, it is obtained The plane void ratio correction coefficient ξ under the actual void ratio e of the coarse-grained soil sample is used to calculate the stacking angle α reflected in the stacking model of equal-diameter circles on the plane, and finally determine the thickness h of the side wall treatment layer under the condition of the diameter D of the permeameter. The principle of this method is clear, the operation and calculation are simple, and the thickness of the side wall treatment layer can be accurately determined by conventional indoor geotechnical test methods, which provides a reasonable basis for the thickness of the side wall treatment layer for the coarse-grained soil permeability test.
Owner:SOUTHWEST JIAOTONG UNIV
Solenoid valve automatic adjustment circuit and its method
ActiveCN106594359BBurn out preventionAdjust reaction speedOperating means/releasing devices for valvesElectricityElectrical resistance and conductance
The invention relates to an automatic electromagnetic valve adjusting circuit and a method thereof. The automatic electromagnetic valve adjusting circuit comprises a coil K1 connected with a fuse FU1. The fuse FU1 is connected with a coil Y and a thyristor VS1. After a rectifier diode VD2 is connected with a resistor R1 and a resistor R2, the rectifier diode VD2 is connected with a resistor R3, a resistor R4 and a voltage stabilizing diode VD3. An audion VT1 is connected with the resistor R3 and connected with a capacitor C1 in parallel. A control loop of an electromagnetic valve is connected with a base electrode of the audion VT1 through a resistor R5 via a contact S1 and connected with a potentiometer R7. The potentiometer R7 is connected with the resistor R5, a resistor R6 and a capacitor C2 in series. One path of the audion VT1 is connected with the resistor R4, and the other path of the audion VT1 is connected with a trigger circuit of the thyristor VS1. A contact S2 is connected with 220VAC current and an electromagnetic valve Y. A coil K2 is connected with a controller B2 and a power source null line, and the coil K2 is connected with a +24V power source. The control loop of the circuit is completely separated from the power source and control of the electromagnetic valve, the situation that in the electromagnetic valve operation process, interference is caused to the controller due to overcurrent or reverse signals is avoided, and damage of the electromagnetic valve due to the sudden power getting or power losing is prevented.
Owner:SINO EURO MATERIALS TECH OF XIAN CO LTD
A compact vacuum pump
ActiveCN107237734BHigh strengthImprove toughnessPositive displacement pump componentsPiston pumpsElectric machineDrive motor
The invention provides a compact type vacuum pump aiming to overcome the defect that as a pressure gage temporarily additionally installed on a vacuum pump and a drive circuit board used for driving a motor are directly installed on a vacuum pump case, damage is easily caused due to collision in the prior art. The compact type vacuum pump is fixedly provided with a gas-pressure meter which can monitor the gas pressure in a pumped container in real time, a brushless direct current motor is used as a drive motor of the vacuum pump so that the performance of the vacuum pump can be improved, at the same time, a case of the vacuum pump is provided with a protection cover used for protecting the gas-pressure meter and a drive circuit board, damage to the gas-pressure meter and the drive circuit board due to collision in the use process is prevented, the structure is compact, and the vacuum pump is convenient to carry.
Owner:金华市威科工贸有限公司
Motor driving module
PendingCN111800066APlay a protective effectLower average currentElectric motor controlDriver circuitElectric machine
The invention relates to a motor driving module, which comprises a pulse circuit, an input circuit, a PWM circuit, a power driving protection circuit and a power switch driving circuit, wherein the input circuit is connected with external signal input equipment; the PWM circuit is electrically connected with the pulse circuit and the input protection circuit respectively; the power driving protection circuit is electrically connected with the PWM circuit; and the power switch driving circuit is electrically connected with the power driving protection circuit. The pulse circuit can generate oscillation and only has two transient steady states, the pulse circuit generates oscillation signals, so that the oscillation signals do not need to be input from external equipment, the input protection circuit and the power protection circuit can prevent overlarge current, a circuit protection effect is achieved, and the safety performance is improved.
Owner:HEFEI POWERSKY ELECTRONICS TECH CO LTD
Anion-containing sponge and foaming method thereof
The invention discloses an anion sponge foaming method which comprises the following steps of preparing 4-tert-octylphenol, polyether, polyether polyol, toluene diisocyanate, modified polyether polyol, water, DC5810 silicone oil, 33 percent triethylene diamine solution and stannous octoate; fusing the polyether, tourmaline powder and rear earth; performing mixing and stirring according to the requirements; and after stirring is finished, pouring a mixture into a foaming box. The anion sponge foaming method controls the time condition and the stirring condition of soaking decomposition and canproduce foamed sponge with high anion content. The invention also provides anion foamed sponge prepared by adopting the method.
Owner:深圳市高乐氏家居用品有限公司
System and method for preventing excessive flying shear tail
ActiveCN108405619BControl startup timeAvoid too largeMeasuring devicesMetal rolling arrangementsEngineeringMetal detectors
The invention relates to the technical field of rolled steel, in particular to a system for preventing a flying shear back-end crop from being too big. The system comprises a roller way, a first hot metal detector, a second hot metal detector, a pyrometer, a flying shear drive unit, a flying shear and a controller. The first hot metal detector, the second hot metal detector and the pyrometer are arranged above the roller way; the second hot metal detector and the pyrometer are arranged on the downstream of the first hot metal detector; the flying shear is arranged at the tail end of the downstream of the roller way; the flying shear drive unit is connected with the flying shear and drives the flying shear to act; and the first hot metal detector, the second hot metal detector, the pyrometer and the flying shear drive unit are connected with the controller. The system for preventing the flying shear back-end crop from being too big provided by the invention can prevent the flying shearback-end crop from being too big, and the occurrence of the phenomena of waste push and cancel closedown caused by the too big back-end crop is reduced.
Owner:SHOUGANG JINGTANG IRON & STEEL CO LTD
Device for graphically cutting wood by using drill bit
InactiveCN110877373AAvoid too largeAvoid the problem of not easily changing directionStationary drilling machinesWood working safety devicesEngineeringDrill bit
The invention relates to the technical field of whole wood household manufacturing tools, and discloses a device for graphically cutting wood by using a drill bit. The device comprises a base, whereinan adjusting disc is slidably connected inside the upper end of the base, a threaded groove is formed in the upper part of the adjusting disc, a sliding rod is connected to the outer side of a movable supporting block, a pattern model is connected to the lower part of a clamping rod, an irradiation lamp is connected to the middle of an upper support, and a light sensing device is arranged on theupper part of a sleeve head. A first driving device drives a first driving shaft to rotate, the first driving shaft drives a second driving device, a screw rod, a first spring, a third driving deviceand the drill bit on the first driving shaft to integrally rotate through a turntable, when the drill bit drives the light sensing device to do circular motion, the drill bit is separated from a lightprojection area, a signal is sent by the light sensing device, and the second driving device drives the drill bit to move inwards through the screw rod, so that the problems of low cutting efficiencyof wood patterns, easy scratching and high working strength are solved by the structure.
Owner:湖州永威家居科技有限公司
CT perfusion scanning method, system and storage medium
ActiveCN108095751AReduce the amount of absorbed contrast agentReduce harmComputerised tomographsTomographyContinuous scanningNuclear medicine
The invention discloses a CT perfusion scanning method, system and storage medium, including obtaining the scan length of a part to be scanned; determining a perfusion scanning mode according to the scan length and the preset scan length of the part to be scanned, wherein the perfusion scanning mode includes a static perfusion scanning and a dynamic perfusion scanning; arranging the scanning timesand the scanning intervals of the part to be scanned in the determined perfusion scanning mode; processing the perfusion scanning for the part to be scanned according to the determined scanning timesand the scanning intervals, thereby being capable of avoiding the larger or smaller scanning intervals selected manually by users and making the arranged continuous scanning of time intervals namelythe scanning intervals of the same part to be more accurate. Under the premise of ensuring that images of the CT perfusion scanning are clear, the CT perfusion scanning method, system and storage medium can minimize the times of the continuous scanning of the same part as much as possible, reduce the amount of a contrast agent absorbed by patients, thereby reducing injuries to the patients.
Owner:SHANGHAI UNITED IMAGING HEALTHCARE
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