2456results about How to "Improve wind resistance" patented technology

Disclosed herein is a polymer comprising an amorphous syndiotactic rich polyolefin comprising greater than about 50 wt % C₃-C₄₀ alpha olefins and having about 50% to less than about 80% r dyads, based on the total number of r and m dyads present in the polymer; a heat of fusion of 10 joules/g or less according to the procedure described in ASTM E 794-85; and an ash content of 1 wt % or less. A functionalized amorphous syndiotactic rich polyolefin is also disclosed, along with methods to produce and a method to use the inventive polymer.

The invention relates to a gyroplane and further relates to a variable-torque four-rotor aircraft with large load capacity. The variable-torque four-rotor aircraft with large load capacity contains a fuselage, four rotor arms which are connected with the fuselage and are symmetrically distributed, and rotors positioned on the rotor arms. Among the four rotors, two adjacent rotors rotate in opposite directions. The included angle of each rotor blade 1201 to the water level can be adjustable, thus making the lift force adjustable and further adjusting the attitude of the aircraft. According to the invention, operationality of the aircraft is substantially raised.

The invention relates to a shaping and trimming method of crowns of pear trees. The crowns are trimmed into a structure of two layers of main branches, wherein each layer of main branches comprises two main branches facing south and north, and lateral branches are left at two sides of the main branches in the horizontal direction. The shaping and trimming method has the advantages of facilitating flower bud differentiation, increasing effective photosynthetic accumulation, enhancing wind resistance, and obviously improving the commodity quality of fruit of a single-layer planar pergola shaping method; moreover, the shaping of the crowns is quick; the cultivation of crown structure can be completed to enter the early fruit period 3 years after the planting in general; the yield of a single plant can be controlled to be 6-10kg, and increases year by year; meanwhile, trimmed crowns do not contain sub-main branches; the trimming method is simple, and is easy to master; the work space of the flower and fruit management of a pear orchard can be controlled; labor and force are saved; the labor efficiency is improved; and the management cost of the orchard is reduced; in addition, the method is suitable for a flat land or a gentle slope landform undulation, and is particularly suitable for a gentle slope with the landform undulation or a slope land with the slope of less than 15 DEG.

The invention discloses a double-linear polarization Doppler weather radar system which comprises an outdoor part and an indoor part. The outdoor part comprises an antenna servo subsystem, a transmitting subsystem, a receiving subsystem, a monitoring calibration subsystem and a power distribution subsystem. The indoor part comprises a signal processing terminal and a user subsystem. According to the double-linear polarization Doppler weather radar system, the ingenious signal link design is adopted, the equipment quantity is reduced, and the reliability of the system is improved; a multi-channel signal processing mode is used, simultaneous measurement of all parameters of a double-linear Doppler weather radar is achieved, and the timeliness of detection data is improved; a signal processing technology based on a GPU is utilized, and the processing capacity of double-linear signals is enhanced; a unique two-channel full-path transmitting-receiving calibration technology is used, two-channel transmitting-receiving system errors of the radar system are reduced, and an effective guarantee is provided for improving the quality of the detection data.

Off-site factory built structure employs a chassis including two interior longitudinal beam members joined at their ends to a perimeter structure. A floor system is integrated within the chassis perimeter. A ledger member is fixed to the inner surface of each longitudinal perimeter member so that a top surface lies in a plane coincident with top surfaces of the interior longitudinal beams. Lateral members are coupled to the tops of the interior longitudinal beams and to the top of the ledger members. The lateral members include secondary stiffening members such as C-channel members, metal Z-channel members, or other metal members of similar structural capacity, spaced apart from each other by a maximum distance S, related to the width of the floor system W, by the equation:

S 12−½W.

The invention discloses a streamlined steel-concrete superimposed box girder, which relates to the technical field of bridge engineering and is used for a long-span bridge girder. Two sides of the superimposed box girder are provided with tuyere structures, and a bridge panel adopts a superimposed structure consisting of prefabricated concrete slabs and a post-poured concrete layer. When the box girder is in use, the superimposed box girder is a streamlined single-box single-chamber or single-box multi-chamber cross section; the tuyere structures are polygonal open thin-walled structures; and longitudinal-transverse prestress is applied in the superimposed bridge panel. The box girder effectively improves the torsional rigidity and wind-resistant stability of the section of the girder, remarkably improves the integrity and durability of the bridge panel, and expands the application of superimposed girders in cable-stayed bridges and other long-span bridges.

The invention discloses a multi-rotor aircraft driven by duct lift fans with diversion helms. The multi-rotor aircraft comprises the multiple duct lift fans with diversion helms, and an aircraft fuselage, wherein the aircraft fuselage comprises a frame, a landing gear, a power module, a flight control module , a load cabin and other function modules; the duct lift fans with the diversion helms are mounted on the aircraft fuselage and mainly consist of propellers, propeller driving units, the diversion helms, diversion helm driving units, ducts and the like, and the ducts are arranged at the peripheries of the propellers and used for improving the efficiency of the propellers, protecting the propellers and reducing the noise of the propellers; the propellers are driven by the propeller driving units; and the diversion helms driven by the diversion helm driving units are arranged on the air inlet sides or the air outlet sides of the duct lift fans.

A vehicle having one or more small vehicle-mounted electricity generating wind turbines located within an area of wind recirculation. The electricity generated is used to recharge vehicle batteries, partially power an auxiliary electric propulsion motor, or supply vehicle parasitic loads.

The invention discloses an intelligent spraying robot for the outer wall of a high-rise building and a control method of the intelligent spraying robot. The intelligent spraying robot is composed of an upper machine body and a lower machine body, the upper machine body is installed on the roof of the building, and vertical lifting is carried out by hoisting equipment in the upper machine body on the lower machine body through ropes; and the lower machine body is attached to the outer wall of the building through adsorption feet, and can use the adsorption feet to achieve up and down walking ona wall surface, a spray gun movement worktable arranged on the lower machine body has multiple degrees of freedom, and a spray gun in the spray gun movement worktable can move in the X direction, theY direction and the Z direction separately as well as rotate around the Z axis. The intelligent spraying robot has high wind resistance capability and high safety factors, can realize intelligent spraying through the matched arrangement of a controller, and can effectively improve spraying quality and spraying efficiency.

The invention relates to a heliostat system with the function of sun pursuing, which comprises a heliostat, a mirror holder of the heliostat, a bracket of the heliostat, a driving device for sub mirrors of the heliostat and a driving device for the mirror holder of the heliostat, wherein the mirror holder of the heliostat is rotatablely installed on the bracket of the heliostat, the driving device for the mirror holder of the heliostat is respectively connected with the mirror holder of the heliostat and the bracket of the heliostat and is used for driving the mirror holder of the heliostat to rotate around a horizontal rolling shaft, the heliostat comprises at least two sub mirrors of the heliostat, the sub mirrors of the heliostat are rotatablely installed on the mirror holder of the heliostat, the driving device for the sub mirrors of the heliostat is respectively connected with the mirror holder of the heliostat and the sub mirrors of the heliostat and is used for driving the sub mirrors of the heliostat to link around respective horizontal pitching shafts, and the horizontal pitching shafts are arranged in parallel and are also arranged with the horizontal rolling shaft vertically. The heliostat system with the function of sun pursuing, which is disclosed by the invention, has a skillful design, a simple structure and higher reliability, has the function of sun pursuing, can be used for effectively improving the problem of wind resistance, is simpler to maintain and rectify and is suitable for large-scale popularization and application.

The invention provides a solar concentrator and a condensing method. The solar concentrator includes: a concave cylindrical trough support surface and a condenser mirror array of unified structure matched on the cylindrical trough support surface. The condenser mirror array of unified structure includes a plurality of strip-shaped reflector mirrors; the length of each strip-shaped reflecting mirror is along the axial direction of the cylindrical trough support surface while the width is along the circumferential direction of the cylindrical trough support surface; and all strip-shaped reflecting mirrors are flexibly connected. The invention also includes an absorption device arranged above the cylindrical trough support surface. The condenser mirror array of unified structure is collocated into the shape of sunlight reflected into the size-restricted space of the absorption device; and the condenser mirror array of unified structure revolves the sun and rotates wholly along the circumferential direction of the cylindrical trough; in addition, in the rotating process, the condenser mirror array can maintain the shape of sunlight reflected into the size-restricted space of the absorption device.

A wind turbine includes a rotor with wind turbine blades each having a root end connected to a hub of the wind turbine and a tip end, the tip end of each of which being equipped with a winglet extending a distance in a direction perpendicularly to a longitudinal direction of the blade. A new and much more slim design of the outer part of the wind turbine blade is disclosed, i.e. with a shorter chord length designed within a narrow band of values defined with respect to the length of the winglet, i.e. the extension in the direction transverse to the longitudinal direction of the blade.

The invention relates to an extra-large fiber reinforced plastic (FRP) combined storage tank structure with a floating roof, and a construction method of the storage tank structure. The extra-large FRP combined storage tank structure comprises a tank top, a tank wall and a tank bottom, wherein the tank top has an FRP latticed shell structure; FRP plates are laid on the FRP latticed shell structure; the tank wall is composed of an inner layer FRP plate, an outer layer FRP plate and active powder concrete between the inner layer FRP plate and the outer layer FRP plate; the floating roof is arranged in the tank cover; a connection piece is arranged between the inner layer FRP plate and the outer layer FRP plate; concrete trapezoid grooves are sequentially formed between the inner layer FRP plate and the outer layer FRP plate along a circumferential direction; prestress bars are pulled between every two adjacent concrete trapezoid grooves section by section; and the inner layer FRP plate and the outer layer FRP plate are formed by connecting FRP spliced plates through tenon tongues and tenon grooves. The extra-large FRP combined storage tank structure is high in corrosion resistance and freezing resistance, insensitive to temperature change, low in heat transmission speed, favorable for keeping temperature in a tank body, high in compression strength, high in corrosion resistance and relatively high anti-permeability.

A large wind-proof daylight collector able to automatically track sun is composed of a daylight gathering module array, supporting frame, azimuth and altitude angle driver, a tracking controller, andazimuth and altitude angle sensors for sending the signals to the tracking controller. Its advantages are simple structure and wind-proof performance and high tracking precision.

The invention relates to an adaptive tuyere of a steel box girder. A bracket is arranged on the side surface of the steel box girder; a reinforcement plate is arranged in a panel of a movable air guide plate; the reinforcement plate is provided with a rotating shaft; the movable air guide plate is arranged at the end of the bracket through the rotating shaft; an upper fixed air guide plate and a lower fixed air guide plate are arranged on the upper part and the lower part of the bracket respectively; an air inlet and an air outlet are formed at both ends of a middle tube of an air guide tube with a constant section or a variable section; a plurality of middle tubes share one air outlet; air guide tube cover plates are arranged outside the air inlets; the air inlets and the air outlet are fixed on the upper fixed air guide plate and the lower fixed air guide plate respectively; the movable air guide plate and the air guide tube cover plates are connected with a servo system and a sensor system respectively; and the servo system and the sensor system are connected with a singlechip. A lifting coefficient and a pitching moment coefficient are changed by changing an air pressure difference between the top surface and the bottom surface of the steel box girder, so that the vortex falling frequency can be changed and the shimmy critical air speed of the box girder is increased; moreover, the pneumatic characteristic of the structure can be adjusted and the anti-wind capability of a bridge structure can be enhanced.

Sealing compositions and application methods for sealing and protecting asphalt roof shingles or other porous roofing and construction materials are described for eliminating algae, mold and mildew, increasing granular adhesion, providing additional UV protection and significantly increasing the wind resistance of the roof or other construction material. The sealing composition includes an acrylic polymer that has been modified by a silicone surfactant to alter its wetting properties so as to promote wicking of the sealer under asphalt shingles and at open edges to prevent curling and water infiltration. The method of applying the sealing composition promotes uniform distribution of the product on the surface of installed roofs as well as enhances bonding between individual shingles by improved penetration on and between shingle layers to increase adhesion area.

The invention relates to a wing deformation type bionic unmanned aerial aircraft and a deformation control method. The wing deformation type bionic unmanned aerial aircraft consists of six functional parts, such as a propeller, a wing body integration wing section, telescopic wing sections, folded wing control sections, bionic wings and a stable tail wing section. The wing deformation type bionic unmanned aerial aircraft has the advantages that by adopting the two types of basic deformation bionic combinations of extending and retraction of the telescopic wing sections and folding of the bionic wings, the pneumatic configuration of a bird in flying is simulated, so that the wing deformation type bionic unmanned aerial aircraft can flexibly and stably fly under the complicated terrains of cities, forests, mountains and the like and the limited space, random, turbulence flow, low-altitude and ultralow-altitude environments; the defect of difficulty in quickly, flexibly, stably and flexibly flying across the complicated near-ground turbulent flow environment in the traditional fixed-wing or multi-rotor unmanned aerial vehicle is overcome.

The invention discloses a solar automatic tracking system comprising hardware which has a smart structural design with single-axle scaly solar panels (1) and a universal joint bearing seat (5), and the solar automatic tracking system is suitable for a shaft support with multiple pillars, is mounted in complex hilly lands, has down-moved gravity of the support and flexible turning and enables the system to adopt a single-axis tracking system to establish a solar power station in bumpy hilly lands, thereby ensuring that the solar panels always obtain solar radiation energy as much as possible in the hilly lands, enhancing the tracking efficiency, effectively improving the anti-wind capability of the hardware, reducing the material breakage brought by windage resistance and strengthening the security and the adaptability. With a unique shadow elusion system processing function, the system prevents the solar panels on a stand from generating energy degradation because of being sheltered from mutual shadows and enables the solar panels to obtain the greatest energy output, thereby not only improving the solar electrical energy generation efficiency greatly, but also enhancing the adaptability of the solar tracking system and saving the limited resources by saving occupied space about 50 percent compared with the prior solar tracking system.