18results about How to "Less freedom" patented technology

The present invention discloses a pneumatic sample transport device based on deceleration and positioning, the device consists of a positioning component and a deceleration component; the positioning component comprises a U-shaped rabbit pipe with an opening downward and one end as a starting end and the other end as a destination end, and a sample transport device arranged in the U-shaped rabbit pipe and transporting target materials from one end to the other end; the U-shaped rabbit pipe and the sample transport device are respectively provided with magnets that attract each other, the deceleration component comprises a ventilation component arranged at the starting end of the U-shaped rabbit pipe, a deceleration component arranged at the destination end of the U-shaped rabbit pipe, and a plurality of sensor components arranged in the bend of the U-shaped rabbit pipe. The present invention decelerates the sample transport device through a control system and positions the sample transport device through the principle of magnetic attraction, thereby avoiding damage to the sample transport device and the contained sample due to severe impact, and improving automation and reducing the difficulty of manipulator design through automatic positioning of the sample transport device.

The invention belongs to the technical field of electrolytic hydrogen production, and particularly relates to a seawater in-situ hydrogen production method. According to the method, a phase change mass transfer tank is included and comprises a seawater area (1), a phase change mass transfer layer (2) and an electrolyte area (3); seawater is discharged from a seawater tank, sequentially passes through a prefilter, a first-stage heat exchanger and a second-stage heat exchanger, and enters the seawater area (1) for phase change mass transfer; electrolyte enters the electrolyte area (3) from the electrolyte mixing tank; the phase-change mass transfer is carried out at the phase-change mass transfer layer (2), and the phase-change mass transfer layer (2) is an IPN film; and discharging from the electrolyte area (3) to an electrolytic cell for electrolytic hydrogen production. The IPN membrane is prepared from polyvinyl alcohol and polyimide, and through a series of modification measures such as fluorination, it is ensured that the IPN membrane has high hydrophobicity and good water vapor permeability, so that the efficiency of electrolytic hydrogen production is improved; in addition, the IPN film is simple and convenient to prepare and operate and high in yield.

The disclosure provides a rockfill concrete three-dimensional fine numerical model, a construction method and a device. A convex polyhedron random aggregate for representing rockfill in rockfill concrete is generated in a sample space, a random placement of rockfill is simulated by simulating a gravity compaction process, and a corresponding surface grid is formed on each rockfill surface. The rockfill surface grid with potential contact is detected, the local surface grid is adjusted, a contact surface is generated, and a rockfill self-supporting framework is obtained. Under the constraint of the rockfill self-supporting framework and the boundary of the sample space, the rockfill, the self-compacting concrete and the interface transition zone are discretized by a three-dimensional body grid, and the rockfill concrete three-dimensional fine numerical model is obtained. The disclosure can truly and accurately reflect the physical characteristics of rockfill concrete based on the polyhedron random aggregate. The rockfill contact surface and the rockfill boundary surface generated by detecting the rockfill grid with potential contact and adjusting the local grid according to the optimal strategy can fully represent the characteristics of the rockfill self-supporting framework.

This application discloses a low-scaling coarse-grained modeling method and related apparatus based on machine learning, belonging to the field of molecular dynamics simulation technology. The method includes: acquiring full-atom data of the target system; constructing a coarse-grained model to be learned; the potential function form of the coarse-grained model to be learned includes a potential energy expression describing polar correlation interactions, and the coarse-grained model to be learned is a model validated by full-atom data; using the full-atom data as the optimization target, the potential function parameters to be determined in the coarse-grained model to be learned are automatically iteratively optimized using machine learning methods until preset conditions are met, and the optimized coarse-grained model is output. While preserving key electrostatic and dipole physics mechanisms, this method significantly reduces the degrees of freedom of the coarse-grained model and reduces human intervention through a highly automated process, thereby improving the computational efficiency of complex system simulations and enhancing the model's accuracy, stability, and cross-system transferability.

The fluid conveying equipment comprises a medicine storage device, a rotating sleeve, a ratchet wheel, a ratchet wheel transmission part and a power assembly, and a piston rod of the medicine storage device is sleeved with the rotating sleeve in a threaded connection mode; the ratchet wheel is mounted on the rotating sleeve in a circumferential limiting manner; the ratchet wheel transmission part is elastically clamped on the tooth surface of the ratchet wheel; the power assembly is in transmission connection with the ratchet transmission part; wherein the power assembly has a first working mode and a second working mode for continuous operation, and in the first working mode, the power assembly drives the ratchet wheel transmission part to perform first movement and is in linkage with the ratchet wheel to rotate by a first angle in the preset direction; in the second working mode, the power assembly drives the ratchet wheel transmission part to conduct second movement and is in linkage with the ratchet wheel to rotate by a second angle in the preset direction. In this way, the structure of the fluid conveying equipment can be simplified, the size is reduced, and the control precision and reliability of the fluid conveying equipment during working are improved.

The present invention relates to a method for calibrating a camera using a calibrated robot. First, the robot is pre-calibrated using a calibrated camera to obtain calibration parameters of the robot. Then, the camera to be calibrated is replaced with the calibrated camera to collect images for calibration, and the parameters of the camera to be calibrated are solved. By using this method, the result of calibration using a long focal length module is sufficiently accurate, and the accuracy of image recognition for large distortion effects is improved.

The present application relates to the technical field of vehicles, in particular to a load wheel chain assembly, comprising a load wheel and a load wheel suspension, the load wheel is installed on the load wheel suspension, the load wheel suspension is sequentially connected in series, forming a flexible load wheel chain assembly. The load wheel chain assembly can be used as a load wheel and a supporting belt wheel, and can guide the rubber track by limiting the lateral displacement (along the width direction of the track) of the rubber track, thereby avoiding the occurrence of the off-track condition. The flexible form of the load wheel chain assembly can make the ground contacting part of the walking system better adapt to the change of the terrain, and facilitate the adjustment of the ground contacting area of the walking system.

A solid-liquid bundled rocket structure simplified modeling method, comprising: establishing a rocket structure three-dimensional finite element model, the rocket structure three-dimensional finite element model comprising a main structure model and a secondary structure model of a rocket body; for the main structure model of the rocket body, according to the type of the main structure model of the rocket body, simplifying the type of the main structure model of the rocket body into a low-dimensional model; for the secondary structure model of the rocket body, according to the type of the secondary structure model of the rocket body, simplifying the type of the secondary structure model of the rocket body into a particle element model; simplifying each main structure model and each secondary structure model of the rocket body, and connecting the obtained low-dimensional model and particle element model according to the corresponding relationship of the rocket structure three-dimensional finite element model to obtain a rocket structure simplified model.

The utility model provides a fixed subassembly, battery and battery pack, the fixed subassembly includes side plate and spacer ring, spacer ring is adapted to fix pole core pole ear, spacer ring includes first spacer ring and second spacer ring, first spacer ring is connected with second spacer ring, first spacer ring is equipped with first embedding portion, second spacer ring is equipped with second embedding portion, second spacer ring is equipped with second embedding portion, second spacer ring is equipped with second embedding portion. The first space ring is provided with a first embedding part, the second space ring is provided with a second embedding part, the side plate comprises a clamping structure, and the clamping structure is connected with the first embedding part and / or the second embedding part, so that the side plate and the space ring are fixed. According to the design, the complexity and time consumption of a traditional interference fit mode are avoided, so that the buckling operation is simpler and more convenient.

The present invention discloses a servo motor and an automation system. The winding joint (400) of the servo motor adopts a fastening type connector, wherein the fastening type connector comprises a tail clamp shell (2). The connector body (1) of the connector is fastened to the tail clamp shell (2). The tail clamp shell (2) specifically comprises an upper shell (21) and a lower shell (22) which are respectively located on the upper and lower sides of the connector body (1) and assembled together. After the upper shell (21) and the lower shell (22) are assembled, a cavity is formed in which the connector body (1) is fastened. The connector body (1) is fastened inside by the tail clamp shell (2), thereby reducing the radial degree of freedom of the connector body (1), thereby preventing the connector body (1) from being subjected to radial external force, resulting in pin withdrawal, female pin cracking, loosening or falling off of cable connection, etc., thereby improving the reliability and stability of the servo motor.

The invention discloses a multilayer heterogeneous structure guided wave modeling analysis method based on damping introduction and grid optimization, and belongs to the technical field of aerospace structure health monitoring, and the method comprises the steps: building geometric models of a main bearing-heat insulation tile structure and a piezoelectric element, and defining parameters; defining material parameters of the main bearing-heat insulation tile structure and the piezoelectric element; carrying out multi-physics field coupling setting; a viscous-elastic material is introduced for damping; performing grid division on the structure; and setting a time step for analysis and solution. According to the method, the attenuation effect of related viscous-elastic materials on the guided wave amplitude is considered, grid division is optimized through the sweeping method, the unit freedom degree is remarkably reduced, meanwhile, the grid quality is ensured, and the accuracy of guided wave modeling analysis is further effectively controlled.

The utility model discloses a bionic aquatic plant riverway purification device which comprises guide grooves and bionic aquatic plants which are arranged on two sides of a riverway, the guide grooves are formed by pouring concrete, matched buoyancy tanks are arranged in the guide grooves, a telescopic frame is connected between the two opposite buoyancy tanks, the telescopic frame comprises a shear fork mechanism and a plurality of cross rods, and the shear fork mechanism is connected with the bionic aquatic plants. The transverse rod is longitudinally connected between two opposite hinge points of the shear fork mechanism, a transverse through round hole is formed in the support and used for being connected with a transverse first pull rope in a penetrating mode, an aeration pipe is installed on the riverbed under the telescopic frame, and a plurality of transverse second pull ropes are connected into the aeration pipe; the first pull ropes and the second pull ropes are vertically opposite one by one, a plurality of uniformly distributed bionic aquatic plants are connected between the first pull ropes and the second pull ropes, and a plurality of uniformly distributed rotary aeration discs are mounted on the aeration pipe. The bionic aquatic plants are arranged between the telescopic frame and the aeration mechanism, the freedom degree of the bionic aquatic plants is reduced, the winding probability is reduced, and meanwhile aeration can promote growth and reproduction of aerobic bacteria on the bionic aquatic plants.

The present application relates to a kind of heavy load equal material forming robot real-time dynamics digital twin system modeling method, comprising the following steps: S1, only considering the dynamics model of heavy load equal material forming robot of link elastic deformation is established;S2, construct multi-sensor distributed force / position interactive measurement system, arrange grating ruler, encoder, pressure sensor, data fusion is carried out in combination with Kalman filter;S3, PID algorithm is embedded into control system, realizes the closed-loop control of motion trajectory tracking and force feedback;S4, establish the digital twin framework including five dimensions of physical entity, virtual entity, digital data, connection and service.The present application realizes the five-dimensional digital twin system of heavy load equal material forming robot, provides the overall view of robot dynamics through the interaction of physical space and network space, overcomes the problems such as large resource consumption and response delay of high-fidelity simulation.

The invention discloses a preparation method of a high-adaptability ultrahigh-strength duct piece concrete admixture. The polycarboxylic acid water-reducing mother solution is prepared from the following components in percentage by weight: 16 to 20 percent of polycarboxylic acid water-reducing mother solution, 10 to 12 percent of polycarboxylic acid quick-dispersing viscosity-reducing mother solution, 6 to 10 percent of polycarboxylic acid early-strength mother solution, 10 to 16 percent of polycarboxylic acid comprehensive mother solution, 2 percent of polycarboxylic acid short-term slump-retaining mother solution, 5 to 15 percent of nano early-strength agent, 0.1 percent of functional defoaming agent, 5 to 10 percent of temperature-inhibiting anti-cracking agent, a compound and the balance of water. Comprising the following steps: 1, adding a nano early strength agent, a temperature-inhibiting anti-cracking agent, a functional defoaming agent and water into a stirring kettle, and stirring for 10 minutes to prepare a uniform solution; and 2, sequentially adding a polycarboxylic acid water-reducing mother solution, a polycarboxylic acid fast-dispersing viscosity-reducing mother solution, a polycarboxylic acid early-strength mother solution, a polycarboxylic acid comprehensive mother solution and a polycarboxylic acid short-term slump-retaining mother solution into the uniform solution obtained in the step 1, and stirring for 30 minutes to obtain the ultrahigh-strength duct piece concrete admixture. The prepared high-strength concrete has excellent working performance, high early strength and good crack resistance; and the prepared duct piece has no bubbles on the appearance. Therefore, the decorative plate is attractive and good in decorative effect.

The invention relates to the technical field of human body assistance, in particular to a leg assistance mechanism which comprises a driving assembly, a first transmission assembly, a second transmission assembly, a third transmission assembly and a first supporting piece, and the driving assembly is in transmission connection with one end of the first transmission assembly and can drive the first transmission assembly to rotate around a first axis. One end of the second transmission assembly is connected with the other end of the first transmission assembly, and the second transmission assembly can rotate around a second axis relative to the first transmission assembly. The third transmission assembly is connected with the other end of the second transmission assembly and can rotate around a third axis relative to the second transmission assembly. The second axis is perpendicular to the first axis and the third axis in different planes, and an included angle smaller than 90 degrees is formed between the third axis and the first axis. The first supporting piece is installed on the third transmission assembly. According to the leg assisting mechanism, distortion of the walking posture of a user after the leg assisting mechanism is worn can be reduced.

The utility model discloses a kind of whetting equipment technical field, for the working blade of whetting and scraping device neck one end, including whetstone and fixed base, wherein whetstone includes working surface.Fixed base includes guide slot and limit hole, limit hole and limit hole intercommunication.Neck moves along guide slot, make working blade and working surface friction contact.Under the restriction of guide slot, working blade can only move along the length direction of guide slot along with neck, thereby fixed the friction path of working blade, reduce the freedom of scraping device relative whetting device, to keep working blade always whetting to same area.The whetstone is embedded in limit hole, so that the angle α of working surface and working blade is greater than or equal to less than 60 °, and the α is less than 80 °.Both can ensure that working blade is whetted to certain sharpness, and also can prevent excessive wear and tear to cause working blade intensity to reduce.

The application discloses a device and a method for measuring deformation of a nuclear fuel assembly underwater. The device comprises an underwater measuring mechanism, a water surface driving mechanism, a control box and an upper computer. The underwater measuring mechanism comprises a rack, clamping components, supporting components and a plurality of measuring components. The rack comprises a plurality of layers of supports provided with through holes or through grooves. The supporting components are arranged at the bottom of the rack and have a supporting position and a retracted position relative to the rack. The clamping components are arranged at the upper part of the rack and have a clamping position and a releasing position relative to the rack. The plurality of measuring components are arranged on corresponding supports along the height direction of the nuclear fuel assembly to be measured. The water surface driving mechanism is connected with the underwater measuring mechanism. The control box is connected with the water surface driving mechanism and the underwater measuring mechanism. The upper computer is used for verifying deformation data of the nuclear fuel assembly to be measured through a redundancy algorithm, data fitting and three-dimensional deformation model reconstruction, obtaining and displaying the deformation amount of the nuclear fuel assembly to be measured. The application further provides a method for measuring deformation of a nuclear fuel assembly underwater.

The invention discloses a rigidity mass matching and structure optimization design method and system for an AC swing head. The method comprises the steps that S1, the AC swing head is divided into a plurality of substructures; s2, establishing a substructure dynamic model and extracting a stiffness matrix and a mass matrix of each substructure; s3, constructing an agent model of the stiffness matrix and the mass matrix of the substructure about stiffness and mass parameters of each structural member; s4, constructing an AC head swinging dynamic model; s5, identifying a weak structural member by adopting a sensitivity analysis method; s6, establishing a weak structural member multi-objective optimization model and solving an optimal sub-structure rigidity and mass matrix; s7, constructing a neural network agent model between the size parameters of the weak structural member and the stiffness / mass matrix of the substructure; and S8, taking the optimal sub-structure rigidity and mass matrix obtained in the step S6 as a target matrix, taking the size parameter of the weak structural member as a design variable, adopting an optimization algorithm, and realizing size optimization by minimizing the difference between the target matrix and the optimized matrix.