198results about How to "Designable" patented technology

The invention discloses a large spatial assembly type antenna reflector modular unit and an assembly method thereof. The modular unit comprises a hexagonal extensible truss, a reflecting rope net and a rope connecting device, wherein the hexagonal extensible truss comprises top hinges, a synchronous power hinge, annular rods, and middle slanting poles; two annular rods with the same length form asynchronous folding rod through the synchronous power hinge, and the synchronous power hinge is connected with two middle slanting poles through three top hinges to form a planar triangle structural unit; 12 planar triangle structural units are connected with one another by sharing the middle slanting poles and the top hinges to form a ring, namely the truss of the antenna reflector modular unit;during connection, synchronous folding rods of two adjacent triangle structural units are spatially staggered with each other, and two layers of hexagons with different sizes and staggered vertexes are formed spatially; the reflecting rope net comprises a metal net for reflecting electromagnetic waves and an adjusting rope for adjusting the shape surface of the metal net; the metal net is sewed on the adjusting rope which is fixed with the truss of the modular unit through the top hinges; and the rope connecting device is mainly used for connecting and fixing the reflecting rope net and the hexagonal extensible truss.

The invention relates to a fiber grating intelligent plate made of fiber reinforced polymer in a pulling extrusion and continuous forming mode and a manufacturing method thereof. The intelligent plate has civil engineering structural stress and self-monitoring double functions. The intelligent plate comprises a plate body composed of fiber grey yarns and matrix resin, wherein the plate body is filled with sensor fibers containing fiber grating sensors and transmission fibers in the fiber direction, the number of the sensor fibers is m, m is an integer larger than or equal to one, each sensor fiber is provided with n fiber grating sensors, and n is an integer larger than or equal to one. The intelligent plate is manufactured in a pulling extrusion and continuous forming process, the fiber volume content of the intelligent plate is no less than 60%, and the intelligent plate facilitates accurate control of tension control stress of fiber plates, compensation of lost prestress and real-time monitoring of reinforced structures when the fiber plates, especially prestress fiber plates are used for reinforcing and repairing concrete structures and steel structures.

The invention discloses a hollow-pipe micro-lattice metal oxide material constructed by adopting a template method and a preparation method thereof. The method comprises the steps: preparing a three-dimensional micro-lattice polymer template of a designed structure by adopting a rapid forming technology; depositing metal oxide on the surface of the micro-lattice polymer template so as to prepare a preformed body; removing a template, thereby obtaining the hollow-pipe micro-lattice metal oxide material. According to the hollow-pipe micro-lattice metal oxide material constructed by adopting the template method and the preparation method thereof, the template method and a thin-film deposition method are organically combined, and the prepared lightweight and porous hollow-pipe micro-lattice metal oxide material has the characteristic of low density and the properties of high strength, high modulus, high hardness, high-temperature resistance, corrosion resistance, radiation resistance, small thermal expansion coefficient and the like and is a multifunctional, lightweight and porous micro-lattice material. The hollow-pipe micro-lattice metal oxide material is applied to the fields of aviation, aerospace, electronic information and the like.

The invention relates to a quick-spliced sectional type composite material truss bridge which comprises facade trusses (1), cross beams (2) and bridge decks (3), wherein each facade truss (1) is composed of an upper chord beam (4), a lower chord beam (5), vertical web girders (6) and inclined web girders (7); the upper chord beam (4) and the lower chord beam are arranged in parallel on the facade and respectively fixed with the upper and lower ends of each vertical web girder (6); each inclined web girder (7) is slantly arranged between every two adjacent vertical web girders (6), and the upper and lower ends of each inclined web girder (7) are respectively fixed with the upper chord beam (4) and the lower chord beam (5); both ends of each cross beam (2) are respectively fixed with two vertical web girders (6) parallel to the facade trusses (1) on the corresponding sides; and each bridge deck (3) is arranged on each cross beam (2) to constitute a truss bridge unit. The invention applies fiberglass reinforced plastics to the entire truss bridge and adopts flexible sectional type design, thus, the invention has the advantages of light weight, shock resistance, corrosion resistance, and convenient and quick transportation and assembly, and has wide application prospects in emergency rescue.

The invention discloses a comb energy harvester converting continuous displacement to impact load, which comprises a long comb and a short comb, wherein the long comb is a power generating element; the long comb is connected and arranged inside an insulated shell via a rail; the upper end of the insulated shell is provided with an insulated top cover; a through hole is arranged in the insulated top cover; a connection rod of the short comb passes through the through hole; when the short comb moves vertically, tooth tips of the long comb and the short comb collide mutually, the upper surface and the lower surface of the teeth of the long comb are coated with electrodes, the electrodes are connected with the input end of a conditioning circuit, and the output end of the conditioning circuit is connected with an energy storage module; and when the short comb moves vertically to generate continuous displacement, tooth tips of the long comb and the short comb collide mutually, a stress field exists inside teeth of the long comb due to effects of the impact load, polarization charges are thus generated, the polarization charges are transferred to the conditioning circuit via the electrodes, the charges are further stored in the energy storage module for being used by an energy consumption element. The sensor of the invention has the feature of converting continuous displacement to impact load, the power generating ability has designability, and the energy harvesting ability is greatly improved.

The invention provides a constant and fatigue stress testing device and a testing method. The testing device comprises a worktable, wherein a transparent framework is arranged on a tabletop of the worktable; the framework is provided with a clamping part for fixing a test piece; the clamping part is connected with an axial stress loading system; the axial stress loading system comprises a force sensor, a screw rod and a servo motor, which are arranged in the worktable in sequence; the force sensor is located between the clamping part and the screw rod; one end of the screw rod is connected with the force sensor and the other end of the screw rod is connected with an output end of the servo motor; the servo motor is connected with a control system. The testing method comprises the followingsteps: firstly, placing the testing device in a natural environment; then mounting the test piece on the clamping part of the testing device; applying constant stress and/or fatigue stress on the test piece, so as to realize a cooperative effect on the test piece by environment and dynamic loads. A damaging process on a structural part can be simulated and reappeared relatively well.

The invention provides a preparation method of a shape memory polymer and application thereof in 4D (four-dimensional) printing, and relates to the field of printing of intelligent materials, in particular to a preparation method of the shape memory polymer and application thereof. The shape memory polymer aims at solving the problems of the prior art that any shape cannot be printed according toactual requirements; the existing shape memory polymer has higher Tg, and cannot meet the requirement of low-powder driving and the biomedical demand. The preparation method comprises the following steps of performing copolymerization on two types of polymer monomers with good biocompatibility according to a certain ratio, so as to obtain a binary copolymer; dissolving into an organic solvent withlow boiling point and high volatilizing property, and treating by ultrasonic waves, so as to obtain a shape memory polymer solution. The prepared shape memory polymer is characterized in that the movement direction, movement speed and applied pressure of a three-dimensional movement platform along axes X, Y and Z are controlled by software, and then pressure is applied to a high-pressure glue dispensing needle cylinder with a miniature needle head by an air pump, so as to build a required three-dimensional structure. The shape memory polymer can be applied to the 4D printing.

The invention belongs to the field of lithium ion batteries, and discloses a nanoparticle-compounded ZIF-8 negative electrode material of high specific capacity bismuth as well as a preparation methodand application of the nanoparticle-compounded ZIF-8 negative electrode material. The environment in a methanol solution is utilized to enable zinc ions (Zn<2+>) in zinc nitrate hexahydrate to cooperate with a 2-methylimidazole ligand to form a ZIF-8 precursor, after the precursor is subjected to high-temperature carbonization treatment in an inert gas shielding atmosphere of nitrogen gas, Zn<2+>is reduced by pyrolytic carbon in the ZIF-8 to zinc elementary substance (Zn) to form Zn@NC, finally, Bi replaces Zn in situ through simple replacement reaction (Bi<3+> plus Zn arrow Bi plus Zn<2+>)so as to obtain Bi@NC finally. The obtained Bi@NC greatly improves the conductivity of Bi, is conducive to reduction of internal resistance and transmission of electrons, and improves the performanceof reaction kinetics; meanwhile, the volume expansion of Bi@NC in the charging and discharging processes is eased, and the reversible specific capacity and cyclic stability of Bi@NC are improved.

The invention relates to a sectional type modularization rapid assembled and spliced bridge which comprises springboard bridge sections (1) and standard bridge sections (2). Each springboard bridge section (1) comprises a top board (11), a web (12), a bottom board (13), a pressure bearing interlocking end board (14) and a negative head and positive head connecting lug board (15). Each standard bridge section (2) comprises a top board (21), a web (22), a bottom board (23), a pressure bearing interlocking end board (24) and a negative head and positive head connecting lug board (25). The springboard bridge sections (1) and the standard bridge sections (2) are fixedly connected through the pressure bearing interlocking end boards (14), the negative head and positive head connecting lug boards (15), the pressure bearing interlocking end boards (24) and the negative head and positive head connecting lug boards (25). Every two standard bridge sections (2) are fixedly connected through the pressure bearing interlocking end boards (24) and the negative head and positive head connecting lug boards (25). Every two assembled and spliced bridges are fixedly connected through a transverse connecting arm (3). The sectional type modularization rapid assembled and spliced bridge has the advantages of being convenient to transport, flexible to assemble and splice, capable of being erected rapidly, and particularly suitable for releasing emergencies and disasters. The webs are made of corrugated steel, and the bottom boards are made of laminated composite materials.

The invention relates to a method for preparing high-temperature resistant silicon carbide. The method is technically characterized by comprising the following steps of: uniformly mixing liquid polycarbosilane and organic metal salt, crosslinking and curing, performing ball-milling, cracking at the temperature of between 900 and 1,100 DEG C, and performing high-heat treatment at the temperature of between 1,600 and 1,850 DEG C to obtain the crystalline silicon carbide containing a trace amount of metal elements. A SiO2 protection membrane which is obtained by performing high-temperature oxidation on the synthesized silicon carbide is SiO2 solid solution containing a trace amount of metal elements. The trace amount of metal elements reduces the activity of SiO2, and increases the conversion temperature of active and passive oxidation of the silicon carbide, so that the use temperature of the silicon carbide is increased. Compared with the prior art, the method has the advantages that: by introducing a trace amount of metal elements into the silicon carbide, the use temperature of the silicon carbide is increased from 1,700 to 1,800-1,850 DEG C, and equipment used by the preparationprocess is simple, safe and reliable, is easy to control and contributes to large-scale production.

A preparation method of a micro bubble ultrasound contrast agent coated by a microcapsule relates to a preparation method of a micro bubble ultrasound contrast agent. The invention solves the problems of the instability of a micro bubble contrast agent and the disappearance of acoustic characteristic of a modified micro bubble. The preparation method of the micro bubble ultrasound contrast agent is that: absorbing, standing or centrifuging, cleaning, absorbing once again, standing or centrifuging and cleaning once more; finally the micro bubble ultrasound contrast agent is available. The invention has simple process, mild reaction condition, simple operation, good reproducibility, wild range of application and environment-friendliness, and is applicable to the surface modification of various ultrasound contrast agents and can be easily implemented.

The invention discloses a low-frequency wideband nacreous layer bionic vibration isolation material. The low-frequency wideband nacreous layer bionic vibration isolation material is provided with a periodic structure consisting of a plurality of basic structure units, wherein each basic structure unit comprises a structure layer I, a connecting layer and a structure layer II which are sequentially connected along the height direction of the periodic structure; the connecting layer comprises four secondary connecting layers which are ranked in a 2*2 matrix and are ranked at equal intervals; each secondary connecting layer comprises a structure layer III as well as a connecting layer I and a connecting layer II which are respectively positioned on the upper and lower surfaces of the structure layer III; the structure layer I, the structure layer II and the structure layer III are made of a material I; the connecting layer I and the connecting layer II are made of a material II; the density of the material I is ymat, wherein ymat is greater than or equal to 1*10<3>kg/m<3> and smaller than or equal to 20*10<3>kg/m<3>; the elasticity modulus of the material II is xmat, wherein xmat is greater than or equal to 0.1Mpa and smaller than or equal to 100Mpa. The basic structure units have the characteristics of quite wide low-frequency band clearance and band clearance designability.

The invention discloses an induction-heating-based structure thermal environment simulation method and apparatus. The method comprises: an appearance and dimension of a copper induction coil as well as a heating current amplitude and a heating current frequency are determined according to a material, an appearance, and a dimension of a tested structure as well as a temperature gradient of a service environment; the tested structure is placed in the induction coil, and an electric signal is applied to the induction coil based on the heating current amplitude and heating current frequency; and a temperature gradient and a strain field of the tested structure under the electromagnetic field effect are collected, and safety and reliability of the tested structure are determined based on the strain field. According to the invention, the tested structure is heated based on induction heating and thus utilization of a complex heating device can be avoided. Moreover, different thermal environments can be simulated by adjusting the magnetic field distribution and the skin depth, so that the electromagnetic field based on induction heating has high designability. The thermal environment simulation method and apparatus of the structure are simplified substantially; and the thermal environment simulation efficiency of the structure is improved.

The invention discloses a lightweight aggregate non-fine concrete and a preparation method thereof. The non-fine concrete is prepared from the following raw materials in proportion by mass: the proportion of cement, coal ash, lightweight aggregate, water to a water reducing agent is equal to 1: (0.00-0.1): (1.50-1.65): (0.25-0.35): (0.008-0.01). The lightweight aggregate non-fine concrete prepared in the invention combines the advantages of lightweight aggregate concrete and non-fine concrete, so that the lightweight aggregate non-fine concrete has the characteristics of light weight, high strength, heat preservation, fire resistance, frost resistance and low heat conductivity, particularly good water permeability and excellent earthquake resistance; and therefore, according to the concrete, the water permeability of a drainage body is enlarged in the construction of a urban drainage system, the noise is reduced, and the earthquake-proof and vibration-isolated system is more superior and has preferable designability.

The invention relates to a carbon fiber winding paving variable cross-section adhesive transmission shaft and a combined type mould thereof. The carbon fiber transmission shaft comprises a carbon fiber tube 1, an integrated joint 2 and the combined type mould. The two ends of the carbon fiber tube 1 are bonded on the integrated joint 2, a three-ball pin column at the other end of the integrated joint 2 is matched with a needle bearing 3 and a ball ring 4 to form constant-speed universal connection, and the needle bearing is limited by a clamp spring. A clamp 5 is in a cylindrical shape, and the mold and machining equipment are connected by the clamp 5. The combined type mould comprises a mould body 6 with the two ends being hexagon-like cross sections (including a transition section) and amould body 7 with the middle being circular cross section, and the combined type mould is positioned and matched by a groove and a boss on the mould and then connected with the cylindrical clamp 5. Acenter hole of a square block 8 is used for assisting demoulding. According to the carbon fiber winding paving variable cross-section adhesive transmission shaft and the combined type mould thereof,the design is reasonable, assembly and disassembly of the mould are convenient, the paving scheme is flexible, the problem that demoulding is difficult is solved, the material performance is sufficiently utilized, the transmission shaft and the combined type mould can adapt to different machining equipment and working conditions, the feasibility and operability are high, the weight is lowered by about 53% compared with steel, the inertia is reduced, and energy is saved.

The invention discloses a combined anti-impact structure of a rotor made from a composite material, as well as a preparation device and a preparation method thereof. The combined anti-impact structure comprises a metal thin-walled cylinder, an inner-side aramid fibre wrapped layer and an outer-side aramid fibre wrapped layer which are sequentially coated and fixed from the inside to the outside, wherein resin is infiltrated on the inner-side aramid fibre wrapped layer at intervals to enable the inner-side aramid fibre wrapped layer to be of a partially hollow structure, and the resin is uniformly infiltrated on the outer-side aramid fibre wrapped layer. According to the invention, on the basis of the existing structure of a rotor made from a composite material, the resin is infiltrated on the aramid fibre layers according to a certain rule, thus the partially hollow structure is formed; and due to the structure, on the basis of furthest reducing the weight of the structure, the thickness of the rotor is increased, the advantages of high toughness and high energy absorption performance of the aramid fibre layers are kept, and the anti-impact performance of the rotor made from the composite material is enhanced. Meanwhile, the combined anti-impact structure disclosed by the invention is capable of remarkably increasing the connection strength among the inner-side metal thin wall, the aramid fibre layers, and the outer-side composite material layer of the rotor made from the composite material, and high in fibre location performance.