50results about How to "Control orientation" patented technology

The invention discloses a multi-degree-of-freedom 3D printer of a fiber reinforced composite material and a printing method thereof. The 3D printing can be performed with any angle and any movement locus by making use of the flexibility of a manipulator; and a 3D printing head mounted on the multi-degree-of-freedom 3D printer can perform the 3D printing of a high-strength short fiber reinforced composite material, and can perform the splicing and the weaving of continuous resin-based long fiber to produce a structural body of a continuous fiber reinforced resin-based composite material. The multi-degree-of-freedom 3D printer can precisely control the orientation of reinforced fiber in a composite material part in the 3D printing process, and can realize the quick production of the composite material part with specific mechanical, electric and thermal performances and a complex structure. Meanwhile, a mold customized beforehand and a pretreated fiber prepreg tape are not needed in the process; and the multi-degree-of-freedom 3D printer is not only suitable for the production of large parts, but also suitable for the large-batch production of small parts, so that the production cost and the production period are largely reduced, and the wide application of the composite material parts is further promoted.

The invention discloses a biological decomposable polymer nanometer fiber film material and preparing method and usage, which is characterized by the following: the material is made of several nanometer to several hundred nanometer fiber diameter nonwoven material, wherein the hyaluronic acid is more than 0 less than or equal to 100; other macromolecular material quantiy is more than 0 less than 100; the quantity of remedy medicine is 0-10 part. The invention possesses well biological compatity, biological decomposition and absorption property, which is applied in the medical tissue engineering rack material.

The invention discloses a direct control method for a titanium-aluminum-niobium alloy lamellar structure, and belongs to the technical field of control research of high-temperature alloy structures. The method is a control method for a titanium-aluminum alloy structure based on a full peritectic transformation process. By applying a directional solidification technology, the alloy is controlled to be subjected to full peritectic reaction by changing solidification conditions (temperature gradient G and drawing speed V), so that primary beta phase dendritic crystals are fully dissolved in a solidification process, and adverse effects which may be probably caused by the beta phase to the alloy structure are eliminated; and thus, the aim of controlling the direction of the lamellar structure is fulfilled. The method can be realized only in a normal Bridgman directional solidification system, so that the defects of complex preparation process and non-uniform components and performance in a seed crystal method are overcome; the method is a new method for directly controlling the orientation of titanium-aluminum-niobium alloy directionally solidified lamellas through a non-seed crystal method, and has great significance to improving the performance of the titanium-aluminum alloy; and the industrial application of the directionally solidified titanium-aluminum alloy is promoted.

The invention belongs to the field of self-cleaning organic/inorganic composite films, and particularly relates to an underwater self-cleaning superoleophobic mineralized fibrous film with a non-woven fabric structure and a preparation method of the underwater self-cleaning superoleophobic mineralized fibrous film. The underwater self-cleaning superoleophobic mineralized fibrous film with the non-woven fabric structure is produced by the following steps: a polymer fibrous film with the non-woven fabric structure and containing a mineralizing regulator is obtained by an electrostatic spinning method; the fiber surface of the polymer fibrous film is controllably mineralized by a biomineralization method so as to obtain the organic/inorganic composite underwater self-cleaning superoleophobic mineralized fibrous film with good stability. In air, the invasion of the film surface is hydrophilic; in water, the invasion of the surface is superoleophobic; and in water, the contact angle of the film surface to oil is more than 150 degrees.

A chemical vapor deposition apparatus for growing film or material (such as carbon nanofibres) on metal layer or catalyst is disclosed. A HF magnetic field acts on the metallic layer in the non-metal reaction chamber to generate eddy effect. The substrate containing metallic layer on a non-metal plate is heated to a controlled temp while the intensity, frequency and acting time of a magnetic field are controlled for growing film at defined position. The polarity of the magnetic field is controlled for directional growing.

The invention relates to a robot that has an articulated arm for moving an end in an N-dimensional space comprising at least N+1 motorized articulations, and a computer for controlling the movements of said motorized articulations. Said computer controls a first step of prepositioning the terminal end of the articulated arm and a second step for its fine positioning.

The invention relates to the technical field of streaming media transmission and wireless communication, in particular to an unmanned aerial vehicle-mounted VR video acquisition and transmission device based on a 5G network, which comprises: a camera module for shooting a VR video in real time; an encoder which is used for receiving and encoding the VR video; a 5G module which is used for wireless communication; a server which is used for caching and decoding; and a user side which is used for VR glasses pull stream playing or computer display playing. The camera module, the encoder, the 5G module, the server and the user side are connected in sequence. According to the invention, the binocular camera shoots the VR video in real time, transmits the VR video to the encoding module for encoding, pushes the VR video to the cloud server, and the user side pulls the VR video from the cloud server and uses VR glasses or a display screen to watch the VR video.

A handle assembly for a vacuum cleaner that includes a handle attached to a duct assembly. The duct assembly includes a first duct and a second duct, and the first duct pivots relative to the second duct about a pivot axis. The first duct and the second duct each have an arcuate section that arcs about the pivot axis. Pivoting the first duct relative to the second duct then causes the arcuate section of one of the ducts to move in and out of the arcuate section of the other of the ducts.

The invention discloses a self-adjustable dust-proof device for a construction site. The device comprises a dust removal enclosure body, wherein a working cavity is arranged in the dust removal enclosure body, the upper side inner wall of the working cavity is rotatably connected with a first transmission shaft extending upward to the outside, the first transmission shaft is provided with a wind force detection assembly, and the working cavity is internally provided with a dust removal assembly. The device adopts the wind force detection assembly, control over the distance of rightward movement of a conductive sliding block can be realized according to the wind speed and the wind direction, thereby controlling magnetic force of an electromagnet, a friction wheel and an adjustment frictionwheel are adopted, through the magnetic force of the electromagnet, the friction wheel and the adjustment friction wheel are controlled to be frictionally connected at different radius positions, finally, orientation of an atomization spray nozzle is controlled through a toothed sliding block, a first gear, and a support pipe, and the problem that water mist is blown outside a building enclosure when wind is strong due to an elevation angle of the atomization spray nozzle.

The invention discloses a method for guiding cell behaviors, based on a gold nanowire array. The method comprises the following steps: a, preparing a substrate; b, depositing a gold film; c, preparinga sample module; d, preparing a two-dimensional gold nanowire array structure; e, preparing a three-dimensional gold nanowire array structure; f, culturing human mesenchymal stem cells; g, guiding the cells through a gold nanowire array. The gold nanowire prepared through the method is simple in topological surface operation and high in controllability, and can accurately control the cross angleof nanowire arrays, thereby providing a universal and stable method for realizing the effective guidance of behaviors, such as cell adhesion, orientation and extension.

An electrostatic loudspeaker comprises a multi-layer panel (1) incorporating an electrically insulating middle layer (2) sandwiched between first and second electrically conducting outer layers (3, 4). A signal generator is provided for applying an alternating electrical voltage across the outer layers (3, 4) to initiate vibration due to variation of the electrostatic forces acting between the layers, thereby serving as a loudspeaker. Furthermore at least one of the outer layers (3, 4) is permeable to air displaced by such vibration. Such a loudspeaker can serve as a low cost audio loudspeaker which can be made lightweight and flexible or large-area so as to render it suitable for a wide range of applications, for example to provide sound reproduction in a home environment without requiring any bulky enclosure, public-address systems, or in a notebook computer or mobile telephone.

The invention relates to the technical field of new energy vehicles, in particular to a disc brake device suitable for new energy vehicles. The disc brake device suitable for the new energy vehicles comprises a cooling mechanism and a fuel injection pipe. A vehicle frame is installed on one side of the cooling mechanism, and a disc frame is installed on the upper part of the vehicle frame. An auxiliary friction plate is arranged in the disc frame, and a main friction plate is arranged on one side of the auxiliary friction plate; a groove is formed in the outer wall of the main friction plate,a fixed disc is arranged on one side of the main friction plate, and shock pads are arranged on the upper side and the lower side of inside of the fixed disc. According to the disc brake device suitable for the new energy vehicles, the cooling mechanism is arranged, an adjusting hydraulic cylinder can effectively push a sleeve to rotate along the outside of a connecting pin, a spraying pipe is adjusted to a proper angle, the spraying pipe sprays water flow out through a nozzle, the water flow can effectively provide efficient cooling treatment for the vehicle frame, and the resistance to thermal attenuation performance of the vehicle frame is effectively enhanced.

The invention relates to a device for transporting hollow bodies, which comprises: - at least one means for grasping a hollow body, said means comprising at least one cam follower (30A) made of an electrically conductive material; - at least one fixed cam (32) which is intended to engage with the cam follower (30A), the cam (32) being made of an electrically conductive material; - a contact layer (34) which is made of an electrically insulating material and is interposed between the cam (32) and the cam follower (30A); characterized in that the cam follower (30A) is connected to a first electrical signal (P1) whereas the cam (32) is connected to a second electrical signal (P2), a member (36) being positioned so as to detect electrical contact between the cam follower (30A) and the cam (32).

The invention provides a high-spinnability nylon composition and a method for preparing nylon fibers. The nylon composition comprises 95 to 100 parts of nylon, 0.01 to 0.1 part of copper compound and 0.1 to 0.5 part of 2-mercaptobenzimidazole. During spinning by using the composition provided by the invention, the spinning temperature can reach 270 to 290DEG C, the spinning temperature is higher, thereby the problems that filament bundles are sharply cooled and solidified and high-molecular orientation cannot be smoothly performed during preparation of fibers with greater filament number are avoided, the drawing speed during spinning can reach 500 to 650m/min, thereby the spinning efficiency and the strength of the obtained nylon fibers are improved, the filament number of the nylon fibers obtained by the invention is 20 to 40d, the strength is 7.5 to 8.0g/d, the elongation is 20 to 25 percent and the performance is excellent.

The invention discloses a large-area out-of-plane liquid crystal region alignment method and a system thereof based on a mask exposure method. The method uses a mask exposure system to construct a polymer microstructure. The polymer microstructure can be composed of different regions, each region has a characteristic size in the order of tens of microns, and the liquid crystal orientation in the region is uniform. The overall size of polymer microstructure can be from tens of square microns to square decimeters, which can meet the requirements of large-area processing, and the processing rangeand structure design of substrate surface can be adjusted at will. The alignment method and the system of the invention are simple in operation, do not need to form an alignment inducing film on thesubstrate in a mechanical or light-induced manner, can realize the self-alignment of the liquid crystal in a micron-scale region, the alignment direction can be controlled in a micro-region, are favorable for the miniaturization of the liquid crystal device and the three-dimensional liquid crystal structure alignment, and can be widely popularized and applied.

The invention provides a sound mechanism and a sound system, and relates to the technical field of electronic equipment. The sound mechanism comprises an image acquisition unit, a control unit, a movement unit and a sound device; the image acquisition unit is used for obtaining a character image; the image acquisition unit is also used for obtaining the azimuth information of human ears accordingto the character image, and transmitting the azimuth information to the control unit; the control unit is used for transmitting a movement instruction to the movement unit according to the azimuth information; and the movement unit is used for controlling the aperture of the loudspeaker of the sound device to be towards the position, where the human ears are, according to the movement instruction.The technical problems that relatively high sound can interfere and influence persons all around, devices, such as an earphone, are inconvenient to use, sound has the boundedness due to devices, suchas the earphone and headset, and the stereophonic effect is limited in the prior art can be solved.

The invention provides a method for prolonging the life of an aluminum alloy preparation die. According to the method, the aluminum alloy is Zr-containing aluminum alloy, the element Zr is added in the smelting and casting process in combination with an induction furnace which is adopted before extrusion to heat a cast rod of the Zr-containing aluminum alloy to the temperature of 500-540 DEG C atthe heating rate of 80-120 DEG C/min, therefore, a stable crystal structure can be formed, extrusion force can be lowered on the premise of guaranteeing extrusion quality, then extrusion capacity is increased, die cracks are reduced, and higher economic benefit is obtained. Through the method, the problem that in the prior art, the die is prone to cracking in the process of preparing the Zr-containing aluminum alloy is solved.

The invention discloses a preparation method of a copper hydroxide nanobelt oriented film. The method comprises the following steps: uniformly mixing 0.002-0.008 mol of cuprous nitrate trihydrate and5-15 mL of polyethylene glycol, performing dissolution, adding 1-5 g of sodium hydroxide particles, and performing a reaction for 2-10 h under stirring to form a blue suspension; performing washing for a plurality times by using distilled water and absolute ethanol to remove impurities, and performing dissolution in a high-purity ethanol solution to obtain a copper hydroxide precipitate; and injecting precursor solutions with different concentrations of 1-10 mol/mL into an aqueous solution at a speed of 100-1000 [mu]L/min to form an oriented film, transferring the oriented film onto a substrate, and performing drying in a vacuum drying oven at 40-60 DEG C. According to the preparation method provided by the invention, the copper hydroxide nanobelt oriented film prepared by the method has auniform surface, uniform arrangement of nanobelts and a higher orientation degree, and opens up novel possibilities for preparation methods of organic, inorganic and organic-inorganic hybrid orientedfilms.