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20results about How to "Low stability requirements" patented technology
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Weak current testing device
PendingCN119510876AHigh precisionLow stability requirementsMeasurement using digital techniquesHemt circuitsComputational physics
The invention belongs to the technical field of microelectronic metering testing, and particularly discloses a weak current testing device which comprises a lock-in amplifying circuit and a proportion measuring circuit. The output end of the lock-in amplifying circuit is connected with the first input end of the proportion measuring circuit; the first input end of the phase-locked amplification circuit is used for inputting a current signal to be detected; a second input end of the phase-locked amplification circuit is connected with a second input end of the proportion measurement circuit and is used for inputting a reference voltage signal corresponding to a current signal to be measured; the phase-locked amplification circuit is used for performing phase-locked amplification and filtering processing on the current signal to be detected by using the reference voltage signal, and outputting a first analog voltage signal corresponding to the current signal to be detected; the proportion measurement circuit is used for carrying out proportion operation on the first analog voltage signal based on the reference voltage signal and outputting a detection voltage digital signal corresponding to the current signal to be detected. According to the invention, measurement errors caused by frequency and amplitude fluctuation of the to-be-measured signal and the reference signal are reduced, and the precision of weak current detection is improved.
Owner:709TH RESEARCH INSTITUTE CHINA STATE SHIPBUILDING CORP LTD
Method for establishing end-to-end secure communication of unmanned aerial vehicle under cloud network architecture
ActiveCN117376911Breduce overheadReasonable allocation of resourcesSecure communicationEnd to end security
The application discloses a method for establishing end-to-end secure communication of unmanned aerial vehicle under cloud network architecture, and takes cloud server as a security service center to provide full-process authentication service for unmanned aerial vehicle end system; the cloud server only issues public authentication materials to unmanned aerial vehicles, and session key negotiation and establishment of end-to-end secure communication are realized between unmanned aerial vehicles; the unmanned aerial vehicle end system does not need to store authentication materials of other unmanned aerial vehicles in advance, the cloud server is driven by specific tasks, and specific authentication materials required for key negotiation are issued to unmanned aerial vehicles which need to be securely cooperated according to task requirements. The application only requires that the cloud server and any one of the unmanned aerial vehicles for key negotiation establish a communication connection, and the authentication materials issued by the cloud server can make the unmanned aerial vehicles realize key negotiation and establish an end-to-end secure channel in a specific range; different temporary public keys are used for each request message, which can effectively prevent the harm caused by long-term and short-term secret leakage.
Owner:XIDIAN UNIV
Method and device for accurately adjusting excitation power supply system of complex superconducting magnet
ActiveCN119095250ATo achieve the purpose of isochronic adjustmentAchieve isochronic adjustmentMagnetic resonance acceleratorsSuperconductor elements usageSuperconducting CoilsHemt circuits
The invention discloses a method and a device for accurately adjusting an excitation power supply system of a complex superconducting magnet, and the device comprises an upper annular main coil and a lower annular main coil which are symmetrically distributed along the central plane of an accelerator, a plurality of limit rings which are uniformly distributed in the circumferential direction in each annular main coil, and a plurality of shimming coils which are distributed in each limit ring from a small radius to a large radius, the main circuit loop flows through the main coil; the main current loop flows through the limit coil and the shimming coil; the main current loop provides basic running current for the main coil, each limit circle and the shimming coil, each branch circuit of the branch current loop is provided with an independent fine tuning power supply, and the independent fine tuning power supply performs fine tuning on the current of the limit circle and the shimming coil in each branch circuit; the method comprises the following steps: supplying power to all serially connected superconducting coils by using a main loop power supply; the fine tuning power supply independently adjusts the superconducting coil on each branch; independent adjustment of coil current can be realized only by increasing a small amount of thermal load.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Assembled wear-resistant ring and atomizing disk including the same
ActiveCN112191414BExtended service lifeavoid wear and tearMovable spraying apparatusStructural engineeringMechanical engineering
Owner:GUANGZHOU LONGJI MASCH EQUIP CO LTD
Steam composite air bath type gasification device
ActiveCN222317824UImprove heat transfer effectreduce demandNon-pressured vesselsIce removalThermodynamicsMechanics
The utility model discloses a steam composite air bath type gasification device which comprises a first finned tube, a second finned tube, a rear end finned tube, a first three-way valve, a second three-way valve, a water bath heater, a liquid inlet tube and a gas outlet tube. An inlet of the first finned tube is connected with the liquid inlet tube, an inlet of the second finned tube is connected with the liquid inlet tube, a heating inlet of the water bath heater is connected with the liquid inlet tube, and the second three-way valve is connected with an inlet of the first finned tube, an inlet of the second finned tube and a heating outlet of the water bath heater. Outlets of the first finned tube and the second finned tube are connected with an inlet of the rear-end finned tube, and an outlet of the rear-end finned tube is connected with the gas outlet tube. According to the utility model, the efficiency and the yield of the vaporizer can be improved, and the defrosting on the surface of the heat exchange finned tube is realized and the efficiency of the vaporizer is improved by switching the working valves under the condition that the vaporization amount of the device is not changed.
Owner:ZHEJIANG ZHIHAI CHEM EQUIP ENG CO LTD
Pressure measuring device for coal mine stope face
ActiveCN224189409UReduced Power RequirementsLow stability requirementsApparatus for force/torque/work measurementMining engineeringElectric machinery
A pressure measuring device for a coal mine stope face belongs to the technical field of coal mining and comprises a chassis, a guide frame is fixedly arranged on the chassis, a concentric-square-shaped frame capable of vertically moving is mounted on the guide frame, and a first through groove and a second through groove are formed in one end, slidably connected with the guide frame, of the concentric-square-shaped frame and are arranged up and down. A stress detector is movably arranged in the first through groove, a drill rod is movably arranged in the second through groove, the stress detector and the drill rod are transversely arranged, the stress detector is connected with a first electric telescopic unit, and the drill rod is connected with a first motor and a second electric telescopic unit. The first electric telescopic unit and the second electric telescopic unit are both transversely and fixedly installed in the concentric-square-shaped frame, the stress detector and the drill rod which are transversely arranged are adopted, stress detection can be directly conducted on the coal wall of a working face or the side of a roadway, and effective data are provided for supporting adjustment; and transverse drilling does not need to penetrate through multiple rock stratums, the drilling depth is small, and the geological condition limitation is reduced.
Owner:ETUOKEQIANQI GREATWALL COAL MINE CO LTD
Magnetic field measurement method based on magnetic rotation effect and image analysis
ActiveCN119619932Aeasy to combineeasy to buildMagnetic field measurement using magneto-optic devicesMagnetic rotationPolarizer
The invention discloses a magnetic field measurement method based on a magnetic rotation effect and image analysis. The method comprises the following steps: constructing a wedge device, and setting a magnetic field measurement device based on a magnetic rotation effect and image analysis by using the wedge device based on a magnetic field measurement method of a polarizer and an analyzer; the wedge device comprises a glass sheet and a magnetic rotation crystal which are equal in thickness; the glass sheet is connected with one end of the magnetic optical rotation crystal in parallel, and the other end of the glass sheet and the other end of the magnetic optical rotation crystal are provided with interval filaments, so that a wedge-shaped air film with an inclination angle is formed between the glass sheet and the magnetic optical rotation crystal; acquiring an image gray value of the wedge interference fringes by using a magnetic field measurement device based on a magnetic rotation effect and image analysis; and based on the image gray value of the wedge interference fringes, the magnetic field intensity is calculated by using a magnetic rotation effect principle. According to the invention, the fine change of the magnetic field in a small range can be accurately measured, the components are easy to combine and the light path is easy to build in the measurement process, and the measurement time is shortened.
Owner:SHENZHEN TECH UNIV
Syringe assembly, high pressure injection device, high pressure injection system and control method thereof
The application relates to an injection tube assembly, a high-pressure injection device, a high-pressure injection system and a control method thereof. The syringe of the injection tube assembly is installed on an injection installation position of the high-pressure injection device, the liquid injection tube group is installed on a liquid injection installation position, the liquid discharge tube group is installed on a liquid discharge installation position, and the exhaust bag is installed in the installation groove. The boost driving mechanism drives the piston to move backward in the injection cylinder, and the liquid medicine is sucked into the injection cylinder through the first pipeline of the liquid injection tube group. The boost driving mechanism drives the piston to move forward in the injection cylinder, and the liquid medicine in the injection cylinder is pushed into the exhaust bag through the second pipeline. After the liquid medicine enters the exhaust bag, the liquid medicine sinks due to gravity and boost pressure and is discharged through the liquid discharge tube, and the bubbles float to the space above the liquid medicine. Even during the liquid medicine injection process, the bubbles can be prevented from being pushed into the human body in the exhaust bag, the continuity of the injection process is guaranteed, the requirement for the structure air tightness and stability is reduced, and the reliability during use is ensured.
Owner:SHENZHEN LUNKE MEDICAL TECHNOLOGY CO LTD
Slope type parking plate flatness detection device
The utility model discloses a slope type parking plate flatness detection device, which belongs to the technical field of flatness detection devices, and comprises a support frame, the support frame is provided with an inclined side surface, and a slope slideway is fixedly arranged on the inclined side surface; a detection mechanism and a sorting mechanism are sequentially arranged on the slope slide way from top to bottom; the detection mechanism comprises a fixing frame, a first gasket and a second gasket, the thickness of the first gasket and the thickness of the second gasket are the same as the thickness of a standard parking plate workpiece, the first gasket and the second gasket are symmetrically arranged on the two sides of the slope sliding way respectively, and the two sides of the fixing frame penetrate through the first gasket and the second gasket respectively and then are perpendicularly and fixedly connected with the slope sliding way. Two ends of the bottom surface of the detection plate are respectively attached to the first gasket and the second gasket; the bottom surface of the detection plate is parallel to the sliding surface of the slope slideway; the sorting mechanism comprises an NG baffle arranged on the slope sliding way, and an NG intercepting air cylinder is arranged at the bottom of the NG baffle. According to the utility model, automatic flatness detection and sorting of parking plate workpieces are realized, and the detection efficiency and precision are improved.
Owner:LIAOCHENG BOYUAN ENERGY SAVING TECH CO LTD
A turning device for a riprap and leveling ship and a riprap and leveling ship
ActiveCN111305217BImprove maneuverabilityimprove securityWaterborne vesselsFoundation engineeringMarine engineeringReduction drive
The present invention discloses a flipping device for a riprap and leveling ship and the riprap and leveling ship. The flipping device comprises: a driving part, a brake, a speed reducer, a rotating main shaft, and a supporting seat arranged coaxially; wherein the driving part, the brake, the speed reducer and the driving end of the rotating main shaft are connected in sequence, the driven end of the rotating main shaft is used to be connected with a retaining frame, and the rotating main shaft is supported on a sliding trolley through the supporting seat. When the brake is in the first state, the driving part can drive the speed reducer to transmit the torque to the rotating main shaft, thereby driving the retaining frame to rotate in the circumferential direction; when the brake is switched from the first state to the second state, the retaining frame stops rotating and remains at a set angle position, so that the posture of the riprap tube and the position of the leveling head can be freely adjusted, which effectively improves the ship's dispatching capability and the safety and operability during the maintenance of key components, and meets the needs of daily maintenance and dispatching navigation of riprap and leveling ships that are not suitable for the existing technology.
Owner:SHANGHAI ZHENHUA HEAVY IND +1
Throat and esophagus supporting and foreign matter clamping device
The invention discloses a throat esophagus supporting and foreign matter clamping device, and relates to the technical field of throat supporting and foreign matter clamping, the device comprises a C-shaped fixing block, a sliding block is slidably arranged on the C-shaped fixing block through a moving structure, and the rear end face of the C-shaped fixing block is slidably connected with a clamping mechanism through a fixing ring; the supporting piece is connected with the C-shaped fixing block and the sliding block through the connecting piece, the sliding sleeve is arranged in the fixing ring in a sliding mode, the relative position between the clamping mechanism and the C-shaped fixing block is kept stable, interference of head movement of a patient on an operator is reduced, and the clamping head moves in the axial direction and rotates along the axis of the sliding core through the fixing handle. The clamping angle of the clamping head is indirectly adjusted through the bending structure, the requirement for hand stability of an operator is lower when foreign matter on the throat of a patient is taken out, the sliding sleeve rotates in the fixing ring, the bending structure enables the right end of the sliding sleeve to be bent, the sliding core in the sliding sleeve is bent synchronously, and the clamping range of the clamping head is enlarged.
Owner:THE THIRD AFFILIATED HOSPITAL OF ZHENGZHOU UNIVERSITY
Seedling transplanter
ActiveCN224124638ULow stability requirementsReduced precision requirementsTransplantingAgricultural engineeringMechanical engineering
The utility model relates to the technical field of seedling transplanting, in particular to a seedling transplanter which comprises a rack, a seedling storage mechanism, a seedling clamping mechanism, a seedling conveying mechanism and a seedling planting mechanism, wherein the seedling storage mechanism, the seedling clamping mechanism and the seedling conveying mechanism are arranged at the upper end of the rack; the input end of the seedling feeding mechanism corresponds to the output end of the seedling clamping mechanism, and the output end of the seedling feeding mechanism corresponds to the input end of the seedling planting mechanism; the seedling storage mechanism comprises a seedling storage box arranged at the upper end of the rack, a seedling pushing motor arranged on the outer wall of the seedling storage box, seedling pushing driving shafts rotationally arranged on the inner walls of the two sides of the seedling storage box, seedling pushing driving gears arranged on the seedling pushing driving shafts, and seedling pushing driven gears rotationally arranged on the inner wall of one side of the seedling storage box and corresponding to the seedling pushing driving gears; the seedling pushing chain is arranged on the seedling pushing driving gear and the seedling pushing driven gear, and the seedling pushing rod is arranged on the seedling pushing chain. According to the design, the structural complexity and the control difficulty of the seedling clamping mechanism are greatly reduced.
Owner:JIZE COUNTY JIUHONG MACHINERY TECHNOLOGY CO LTD
Normally closed mechanical expansion shaft
The invention discloses a normally-closed mechanical expansion shaft structure and an expansion shaft thereof, and aims to overcome the defect that an existing normally-open mechanical expansion shaft is poor in stability. The device comprises a fixing structure and a piston structure, the fixing structure comprises an air pipe, a shaft pipe and a plurality of positioning covers, the air pipe is inserted into the shaft pipe, the positioning covers are installed between the air pipe and the shaft pipe, a piston cavity is formed between every two adjacent positioning covers, the piston structure comprises a piston and a key strip, and the piston is elastically connected with the positioning cover on one side of the piston cavity. The other side of the piston cavity is communicated with the air pipe, the piston is matched with the key strip in a wedge angle mode, the shaft pipe is provided with a through hole matched with the key strip, and when thrust generated by air pressure on the piston is smaller than elastic force of the elastic piece, the piston axially moves to push the key strip to extend outwards in the radial direction. And compared with a normally-open structure, better stability is achieved, and the stability of a production line is facilitated.
Owner:上海韩东机械科技有限公司
Degumming detection equipment for automobile rubber bushing
ActiveCN222393953UReduce use costLow stability requirementsUsing mechanical meansMaterial analysisStructural engineeringMechanical engineering
The utility model discloses an automobile rubber bushing degumming detection device comprising a square tube support, the top end of the square tube support is provided with a base station, the central position of the top of the base station is provided with a lower fixing plate, one side of the top end of the lower fixing plate is provided with a first side supporting plate, and the other side of the top end of the lower fixing plate is provided with a second side supporting plate. A middle supporting plate is arranged at the top end of the lower fixing plate between the second side supporting plate and the first side supporting plate, an upper fixing plate is arranged at the top end of the middle supporting plate, an electric cabinet is arranged on one side of the top end of the upper fixing plate, a first air cylinder is installed on the other side of the top end of the upper fixing plate, and the bottom end of the first air cylinder penetrates through the upper fixing plate and is provided with an upper pressing head. According to the utility model, the double-cylinder design is adopted, the beat is saved by one time, the efficiency can be doubled, defects of a product body can be fully exposed, double-sided detection like a general aerostatic press is not needed, and the product body is limited and fixed by the upper tool, so that the product body is more stable and higher in safety.
Owner:NINGBO TUOPU GROUP CO LTD
Masonry module mounting structure and automatic masonry equipment
ActiveCN222162067ULarge operating radiusLow stability requirementsBuilding material handlingArchitectural engineeringMachine
The utility model provides a masonry module mounting structure. The masonry module mounting structure comprises a lifting seat, a module mounting seat, two masonry robots and a driving assembly, wherein the lifting seat is used for sleeving a machine body stand column and moving up and down along the machine body stand column, and the lifting seat is used for being connected with a manual operation platform; the module mounting base annularly sleeves the machine body stand column and is fixedly connected with the lifting base, and sliding plates are slidably connected to the two opposite side walls of the module mounting base in the horizontal direction correspondingly; the two masonry robots are fixedly connected to one sliding plate respectively; the driving assembly is arranged on the sliding plate, is in transmission connection with the module installation base and is used for driving the sliding plate to horizontally move on the module installation base. According to the masonry module mounting structure provided by the utility model, the action precision of a masonry robot can be prevented from being influenced by the shaking of a manual operation platform, and the construction efficiency and the masonry operation stability are improved.
Owner:TANGSHAN YINGLAI TECH CO LTD
Battery pole piece, battery and power device
ActiveCN222530447Uguaranteed performancelow costSecondary cellsNon-aqueous electrolyte accumulator electrodesElectrical batteryPole piece
The utility model relates to the technical field of batteries, and discloses a battery pole piece, a battery and a power device. The battery pole piece comprises a current collector and an active material layer arranged on any surface of the current collector, and the active material layer comprises a first structural layer and a second structural layer. The first structural layer is located at the bottom layer and is in contact with the surface of the current collector, the first structural layer is prepared from a first active material, and the surface density of the first structural layer accounts for 20%-80% of the surface density of the active material layer; the second structural layer is located on the top layer away from the current collector and is prepared from a second active material, and the structural stability of the second active material is higher than that of the first active material. According to the utility model, the second structural layer positioned on the top layer can ensure the performance of the battery, and the first structural layer positioned on the bottom layer has low stability requirement and low cost, so that the cost can be reduced on the premise that the performance of the battery is not reduced.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD
Seat buckle
The utility model discloses a seat buckle which comprises a buckle body and at least two inserting blocks, and a fixing cavity is formed in the buckle body. The buckle further comprises an unlocking piece, a locking structure and a magnetic attraction assembly, the unlocking piece is positioned on the buckle body and movably arranged in the fixing cavity in a penetrating mode, and compared with the operation that in the prior art, the inserting block needs to be manually pushed into the fixing cavity and the inserting block can be released only by stably controlling the buckle, the magnetic attraction assembly is driven by magnetic force, and therefore the inserting block can be released. And the insertion block can be automatically and accurately adsorbed into the fixed cavity and is positioned, so that the positioning efficiency is greatly improved, and the insertion block can be effectively prevented from being accidentally brought out by a tightened safety belt. In the inserting block dismounting link, a user only needs to lightly hold the buckle body and press the unlocking piece, magnetic traction can be quickly relieved, and easy piece taking is achieved. The whole operation process has low requirements on the stability of the buckle main body, and the use convenience and reliability are greatly improved.
Owner:KUNSHAN YOULIER PLASTIC TECHNOLOGY CO LTD
A kind of accelerated test method for rheology of rockfill material based on small amplitude cyclic stress disturbance
A kind of rockfill material rheological acceleration test method based on small amplitude cyclic stress disturbance belongs to geotechnical engineering technical field.It includes: preparing rockfill material sample and carrying out initial state adjustment;Loading to target confining pressure and target deviatoric stress state;On the basis of target deviatoric stress state, small amplitude axial cyclic stress is applied to promote rockfill material particle contact adjustment, skeleton structure rearrangement and cumulative deformation development;Axial deformation, volume deformation and plastic strain accumulation direction under cyclic loading condition are collected and arranged;Then, the development direction of the volume change-axial deformation obtained by the acceleration test is compared and verified by traditional pure static load rheological test.The invention introduces small amplitude cyclic stress as an acceleration disturbance means, which can quickly obtain the rheological deformation value of rockfill material under the premise that the development direction of volume change and axial change remains reasonable and consistent, shorten the duration of traditional rockfill material rheological test, reduce the long-term stable operation requirements of large test equipment, and improve the efficiency of obtaining rheological deformation value of rockfill material under multiple working conditions.
Owner:中国雅江集团有限公司 +1
Machining path interpolation numerical control system and machine tool based on multiple models
ActiveCN119292185AHigh dimensional accuracyquality improvementProgramme controlComputer controlControl engineeringMachine
The invention discloses a multi-model-based machining path interpolation numerical control system and a machine tool, and the system comprises a memory which obtains and stores machining path information and interpolated stepping information; the interpolator is used for reading the processing path information from the memory based on a selected interpolation strategy to carry out iterative interpolation of geometry and processing speed; wherein the interpolation strategy comprises the steps of performing interpolation on an upper computer, performing interpolation on a lower computer, performing coarse interpolation on the upper computer and performing fine interpolation on the lower computer; the inverse solver is used for inversely calculating the position information of each physical axis from the cutter location point position of the interpolation cutter location point and the cutter axis vector direction and storing the position information; and the driver is used for generating and outputting a motion control and / or IO control command to drive each shaft of the machine tool and matched equipment to work. Through the precise cutter location point track model, the cutter axis point track model and the cutter location point and cutter axis point correlation function, high-precision machining path control can be realized based on different interpolation strategies, so that the machining precision of a machined part is improved.
Owner:ROUSHENGGANG INTELLIGENT TECH (SUZHOU) CO LTD
Ship loading method for jacket fixed platform pile foundation
PendingCN119637004Alower center of gravityLow stability requirementsCargo handling apparatusPassenger handling apparatusArchitectural engineeringGravity center
The invention discloses a ship loading method for a jacket fixed platform pile foundation, which belongs to the technical field of ocean engineering and comprises the following steps: S1, laying a bottom layer steel pile tool on a site, and hoisting two steel piles on the first layer to a steel pile tool cross beam; s2, the steel piles are sequentially hoisted according to the sequence of two steel piles on the first layer, three steel piles on the second layer and three steel piles on the third layer from bottom to top, and meanwhile the second layer and the third layer of the steel pile tool are welded; s3, the SPMT trolley is started to enter from the two sides of the steel pile tool and is in place at the preset jacking position; s4, the SPMT trolley jacks and lifts the packaged steel piles, and the steel piles are transported to a transportation barge which is barged by a wharf; and S5, after the steel pile reaches the preset position, the SPMT trolley retreats, the steel pile tool outside the ship is cut, welding shipment fixing work is conducted, and steel pile shipment is completed. The SPMT trolley can enter and exit from the two sides of the steel pile tool, the gravity center of a steel pile tool frame is lowered, the requirement for the stability of a ship is lowered, and the ship loading efficiency is improved.
Owner:SHENZHEN BRANCH CHINA NAT OFFSHORE OIL CORP +1