33results about How to "Continuously adjustable size" patented technology

The invention provides a preparation method of a porous polyethylene film. The preparation method comprises the steps that a polyethylene glycol-pallyl alcohol propoxylate-polyethylene glycol three-block copolymer is adopted as a pore forming agent, the pore forming agent is added into polyethylene as a micropore structure guide template, and mixed materials are subjected to mixing melting at a high temperature; then, tabletting forming is carried out, a film is cooled, and the polyethylene glycol-pallyl alcohol propoxylate-polyethylene glycol three-block copolymer in the film is removed; and then, pore broadening is carried out through a bidirectional stretching machine, and the porous polyethylene film with a non-through hole porous structure is obtained after heat setting. According to the preparation method, the size of the prepared porous film is controlled through adjusting the dosage of the pore forming agent; on the other hand, the film is stretched, and the pore size of the prepared porous polyethylene film is continuously adjusted through controlling conditions like stretching temperature and stretching intensity; and besides, the preparation method is simple in technology, environment-friendly in use, and applicable to industrial production.

The invention belongs to the field of laser focusing ablation, excitation and ionization optical path systems, and relates to a high-power focusing optical path system for the continuous adjustment ofthe dimension of a laser spot. The system is suitable for a laser spectrometer, a laser mass spectrometer, and a laser inductively coupled plasma spectroscopy or mass spectrometer. The optical path sequentially comprises a beam expanding lens group, a mechanical diaphragm, a tuning lens group, a high-power focusing lens group and a window plate along a propagation track of a beam. The optical total length is 350-700mm, the back focal length is 20-200mm, the external diameter of a lens is 20-25.4mm, and the focusing multiple is greater than 25. The beam expanding lens group performs the two-time expanding of laser, thereby facilitating the subsequent high-power focusing. The spacing between lenses of the tuning lens group is changed, and the size of the mechanical diaphragm is fixed, so the divergence angle of laser can be changed to obtain laser spots in different sizes. The aperture of the mechanical diaphragm is changed, and the spacing between lenses of the tuning lens group is fixed, so the laser spots in different sizes are obtained through the detailed theoretical calculation and actual error restoration, and the adjustable range of the focusing laser spots is 5-600 microns.

The invention discloses an X-ray generating apparatus, a static CT imaging apparatus and an X-ray generating method. The X-ray generating apparatus is composed of a base electrode, a grid electrode, a focusing electrode, an X-ray anode target, at least one incident light source, and a first light source adjusting apparatus. The at least one incident light source irradiates the base portion of the base electrode; and a coating layer having photoconductive resistance effect is arranged at the base. And the first light source adjusting apparatus is used for controlling the irradiating position or the movement of the incident light source at the base. According to the provided X-ray generating apparatus, the emission area, the spatial position, and movement of an electronic source are freely adjusted and controlled by controlling optical signals; and thus the corresponding focusing point size, the bulb tube current magnitude, and the X-ray beam generation position are controlled. According to the static CT imaging apparatus containing the X-ray generating apparatus, the corresponding optical signal scanning controlling is used to replace the method employed by the existing static CT device, wherein a plurality of X-ray sources are controlled and driven individually based on the traditional circuit according to the method. Therefore, the complex degree of the system design is substantially reduced and the cost of the system apparatus is lowered.

The invention provides phototherapy equipment with multiple shading plate modes. The equipment includes a phototherapy instrument. A square light outlet is formed in the bottom of the phototherapy instrument, and shading plates matched with the light outlet are arranged under the light outlet. The phototherapy equipment with multiple shading plate modes are provided with the shading plates of different specifications, and the shading plates have similar but slightly different functions and have their own characteristics. The continuous adjustable transparent shading plates have the advantagesthat the size of the shading plates can be continuously adjustable; a base and a top cover are transparent and can prevent ultraviolet light from penetrating so that a user can easily observe the location of skin lesions (leucoderma) and the light output condition during phototherapy. According to the light out openings of different sizes and shapes in the nonadjustable transparent shading plates,the nonadjustable transparent shading plates can be divided into several specifications. The flexible shading plates are flat and thin, provided with windows of various shapes and made from transparent flexible materials, and non-window areas can prevent ultraviolet light from penetrating. Covering plates are made from flexible materials and can be placed on uneven parts of the body at will. In addition, the windows have more shapes and sizes, and the practicability is higher.

The invention discloses a permanent magnet rheological damper with adjustable damping force, which comprises a working cylinder, a piston, two piston rods, a built-in magnetic field generator and a position adjustment mechanism of the built-in magnetic field generator. Both the piston and a piston rod have a central through hole with the same diameter; the built-in magnetic field generator and the position adjustment mechanism of the built-in magnetic field generator are installed in the piston and the piston rod with the central through hole, and the piston is made of a circular ring with the same thickness and high conductivity. The magnetic metal material and the ring-shaped non-magnetic material are combined according to the way that a ring-shaped high-magnetic-permeability metal material and a ring-shaped non-magnetic material are superimposed on each other, and the non-magnetic material is bonded or riveted or embedded. The metal tube is fixed as a whole; the built-in magnetic field generator consists of a disc-shaped permanent magnet and a disc-shaped high-magnetic-permeability metal material with the same thickness. After being assembled in a stacked way, it is fixed as a whole by bonding or riveting or embedding in a non-magnetic metal tube. Adjusting the distance between the built-in magnetic field generator and the bottom of the piston hole can change the output damping force of the permanent magnet rheological damper with adjustable damping force.

The invention relates to a silicon oxide sphere particle, in particular to a method for preparing a hollow nano silicon oxide sphere. In a bionic system with room temperature approximately neutral, the three block copolymer F1127 is taken as a structure guiding agent, the mutual interactions between hydrolytic oil-soluble silica resources and the three block copolymer F1127 and inorganic electrolytes are controlled, the hollow spherical particle is obtained by steps of the preparation of polymer micelle, hydrolytic polymerization of silica resources, hydrothermal crystallization, drying and extraction of the structure guiding agent; the size of the spherical particle is continuously adjusted in the range of between 10 and 20nm, and the thickness of a shell wall is continuously adjusted inthe range of between 4 and 10nm. The synthesized nano hollow sphere has the advantages of big specific surface, big hole capacity, uniform particle size and good dispersibility of the particle, a multi-level structure formed between nano hollow spheres and high mechanical stability and thermal stability, etc.

The invention discloses a method for achieving cross-scale photolithography or multi-resolution imaging through change of a beam expansion ratio. A beam expanding mirror in a single-beam spot scanningphotolithography or imaging system is replaced with an electric adjustable magnification beam expanding mirror, and then according to a relevant calculation formula, continuous adjustability of the diameters of focal spots is achieved through adjustment of the beam expansion ratio. According to the method, the spots with the continuously adjustable diameters can be provided in the single-beam spot scanning photolithography or imaging system, and the cross-scale photolithography or multi-resolution optical imaging can be achieved rapidly, simply and conveniently.

The invention relates to an all-inorganic perovskite nanosheet and its preparation method and application. The preparation method adopts a precursor solution with cesium added at room temperature, uses an organic solvent as a solvent and a surfactant, and in an inert gas atmosphere, with a certain The heating rate is gradually raised to the set temperature, then rapidly cooled in an ice-water bath, and the all-inorganic CsPbBr is obtained through repeated centrifugation, redispersion, and washing processes. 3 perovskite nanosheets and apply the material to blue LED devices. The present invention controls the reaction kinetics by adjusting the reaction temperature and reaction time, and obtains highly efficient all-inorganic CsPbBr with a thickness of one to five atomic layers. 3 The perovskite nanosheet has a luminous range of 440nm to 470nm, and the invention realizes its application on blue LED devices and has a good application prospect.

The invention provides a method for preparing a porous polyethylene film, using polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer as a pore-forming agent, and the pore-forming agent serves as a microporous structure-guiding The template is added to the polyethylene, the mixed material is mixed and melted at high temperature, and then pressed into a tablet, and then the film is cooled and the polyethylene oxide-polypropylene oxide-polyethylene oxide triembedding in the film is removed Segment copolymer, and then use a biaxial stretching machine to expand the pores, and obtain a porous polyethylene film with a non-through porous structure after heat setting. The present invention controls the size of the prepared porous film by adjusting the amount of pore-forming agent; on the other hand, stretches the film, and realizes the preparation of the prepared porous polyethylene film by controlling the stretching temperature, tensile strength and other conditions. Continuous adjustment of hole size. In addition, the preparation method provided by the invention has a simple process, is environmentally friendly and is suitable for industrial production.

The invention discloses an inverter control circuit with constant pulse width output and its operating mode, which are used to realize the unipolar operation of the inverter. The inverter control circuit is composed of eight parts: a sampling module, an inverter, a microprocessor dsPIC, a reference voltage generating module, a summing and integrating module, a comparing and exclusive OR module, a monostable trigger and a driving circuit. Under the control of the circuit, the output pulse width of the inverter is constant, which is equal to the transient state maintenance time of the monostable trigger. The time of each cycle is controlled by the reference voltage, the sum and integral module and the comparison XOR module, and the output voltage is equal to the reference voltage in one cycle. The control circuit has the advantages of good input voltage adjustment, strong robustness, strong ability to suppress load changes, and simple control. It does not require an accurate mathematical model. The magnitude and frequency of the inverter output voltage are continuously adjustable, and the output sinusoidal voltage High precision.

The invention discloses anatase titanium dioxide nano-rods and a preparation method thereof. According to the invention, titanium alkoxide is adopted as a titanium source, an organic alkali is adopted as a glue solution, ethylene glycol-water or ethylene glycol-water-ethanol is adopted as a solvent; low-temperature glue solution is carried out, and then high-temperature hydrothermal reaction is carried out; and crystal growth is controlled in a manner of oriented bonding, such that the morphology of a final product is controlled in a special nano-rod shape. The oriented bonding direction is a (001) direction, and a crystal exposed surface is a {101} surface. With different reaction conditions, the diameters of the nano-rods are adjustable within a range of 5-60nm, and the lengths of the nano-rods are adjustable within a range of 50-400nm. According to the nano-rod growth process, a plurality of anatase grains are subjected to local bonding fusion according to a certain optimized direction through crystal lattice match sharing common crystal surfaces, such that the nano-rods with certain length-to-diameter ratio, good dispersion, and huge specific surface area is formed. With an electrode material prepared by using the nano-rods, higher electron collection efficiency can be easily obtained, and high photoelectric performance is provided.

The invention relates to a sulfonic acid polystyrene-silicon oxide hybrid solid acid catalyst and a preparation method. Specifically, it is a sulfonic acid functionalized polystyrene-silicon oxide composite nano hollow sphere, which consists of sulfonic acid polystyrene and silicon oxide [polystyrene: silicon oxide is = (5-50wt%): (50- 95wt%)]; has a hollow spherical shape; the acid content is between 0.5-3.0mmol / g H+, the specific surface area is 50-600m2 / g, and the pore volume is 0.1-0.4cm3 / g. The specific preparation steps are as follows: under alkaline system, cationic surfactant is used as structure directing agent, polystyrene is used as co-template agent, sodium silicate (Na2SiO3) or orthomethyl silicate (TMOS) or orthosilicate Ethyl ester (TEOS) was used as the source of inorganic silicon. After stirring, filtering and drying, polystyrene-silica nano hollow spheres were obtained. The obtained polystyrene-silicon oxide nano hollow spheres are reacted with a sulfonating agent, filtered, and dried to finally obtain a sulfonic acid polystyrene-silicon oxide hybrid solid acid catalyst. The method has few steps and takes a short time.

The present invention is an adjustable rectangular diaphragm comprising: a frame, a screw mechanism, a first spring, a second spring, a first slider, a second slider, a lever, and two blades; The installation hole and the accommodating part of the fixed spring communicate with the position corresponding to the U-shaped long slot; the U-shaped long slot with three slots is located at the edge of the frame; the first spring and the first slider are placed at the bottom of the first slot; Place the second spring and the second slider at the bottom of the second groove; insert the lever of the protruding shaft in the third groove; the top of the screw mechanism is in contact with the plane of the first slider; one end of the third spring is placed in the accommodating part Among them, the other end of the third spring is in contact with one end of the second slider; the two blades are symmetrically placed on the upper surface of the frame; each blade is fixedly connected with the corresponding first and second sliders, and the right-angled blade of each blade The surface is located at the corresponding position on the upper surface of the frame, and the right-angled blades corresponding to the two blades are placed opposite to each other to form a matching rectangular opening, forming an adjustable rectangular aperture.

The invention discloses a size-adjustable β-Na(LuY)F 4 The invention discloses a preparation method of mutual-solubility nanocrystals, belonging to the technical field of nanometer fluorescent materials. The present invention uses rare earth ion Lu 3+ and Y 3+ Work together as matrix cations to bind NaLuF 4 with NaYF 4 The characteristics of these two excellent up-conversion luminescent substrates are synthesized by thermal decomposition method and automatic nano-synthesizer. While keeping the preparation parameters such as reaction temperature, time, pressure, sodium source and fluorine source concentration unchanged, through Regulating Lu 3+ and Y 3+ The nanocrystalline size of the product is adjusted by the feeding ratio of the two ions, and the β-Na(LuY)F with continuously adjustable size is realized. 4 Synthesis of miscible nanocrystals. The preparation method of the invention can obtain the miscible nanocrystal with good monodispersity, strong crystallinity, small crystal size, regular shape, uniform particle size distribution and excellent luminous performance.

The invention relates to an ultrasonic vibration cutting work head. The ultrasonic vibration cutting work head is compounded on a numerical control milling and drilling machine, and the work head mainly comprises a blade, a blade fixture, a variable-amplitude pole and an energy converter. The blade is connected with the variable-amplitude pole through the blade fixture, the blade fixture is connected with the variable-amplitude pole in a threaded mode, so that the situation that the central line of the blade is coincident with the central line of the variable-amplitude pole is ensured. A shaft shoulder upper press plate and a shaft shoulder lower press plate are connected on the outer shaft shoulder of the amplitude-change pole in a sleeving mode, and the shaft shoulder upper press plate is fixedly connected with the shaft shoulder lower press plate through a bolt. The shaft shoulder lower press plate is fixed on a suspended beam through a bolt. The variable-amplitude pole is connected with the bottom of the energy converter, an energy converter press plate is tightly and fixedly arranged on the upper portion of the energy converter, and the energy converter press plate is fixed on the suspended beam through a bolt. The suspended beam is fixedly connected with a connecting block on a first flange through a bolt, and the first flange is connected with a second flange through a plurality of supporting blocks. By adoption of the ultrasonic vibration cutting work head, the ultrasonic vibration cutting machining is achieved, and the work head is convenient to design, easy to machine and assemble and disassemble.

The invention discloses a vortex beam generation system, method and phase modulation combination device. The phase modulation combination device of the invention includes two reflective spiral phase mirrors, and the phases of the two reflective spiral phase mirrors are respectively set to Aθ 2 and ‑Aθ 2 , A is a constant used to control the variation range of the topological number of the obtained vortex beam, θ is the azimuth with the center of the reflective spiral phase mirror as the origin, two reflective spiral phase mirrors are set on the optical path, and the laser beam passes through The two reflective spiral phase mirrors are reflected in turn and are attached with a spiral phase factor with a set topological number to become a ring-shaped vortex beam. The angle of the two reflective spiral phase mirrors is controlled by rotating one or two reflective spiral phase mirrors. difference, to adjust the topological number of the resulting vortex beam. The present invention designs a pair of reflective spiral phase mirrors with opposite spin directions, and generates a vortex beam with an adjustable topology number through rotation after combination, which is suitable for various laser processes such as laser cutting, welding, and drilling.

The invention discloses a vortex beam generation device, system and method with an adjustable topological number. The vortex beam generation device with an adjustable topological number includes two helical phase mirrors, and the phases of the two helical phase mirrors are respectively set is Aθ 2 and ‑Aθ 2 , two helical phase mirrors are arranged on the optical path in turn, and the topological number of the vortex beam obtained by increasing the angle difference between the two helical phase mirrors increases by 1. After the laser beam is located in this device, it can be added with a helical phase factor to achieve phase modulation, so that the energy distribution of the laser beam becomes a circular distribution, and the angle difference between the two helical phase mirrors can be controlled by rotating one or two helical phase mirrors. The topological number of the resulting vortex beam is tuned, resulting in a ring-shaped spot with tunable size. In the present invention, a group of spiral phase mirrors with a second-order nonlinear spiral structure are designed to superimpose and generate a vortex beam with an adjustable topological number, forming an annular spot with energy distribution concentrated on the edge, a larger diameter, a longer focal depth, and an adjustable size. .

The invention provides a solar simulator for a solar photo-thermal power generation experiment, and belongs to the technical field of detecting equipment for solar photo-thermal power generation devices. The solar simulator is used for the solar photo-thermal power generation experiment, and is characterized in that a supporting mechanism of an optical device is connected with a rotating mechanism of the optical device; analog lamp units are mounted on the rotating mechanism; a clamping device is positioned in front of the optical device; the analog lamp units of the optical device are opposite to a fixture of the clamping device; the fixture is used for clamping a to-be-detected sample; a detecting part of a detecting device is opposite to the to-be-detected sample which is clamped through the clamping device; a control device is connected with the optical device, the clamping device and the detecting device through cables; and a cooling device is positioned on one side of the optical device and connected with the analog lamp units of the optical device. The solar simulator provided by the invention is widely adaptive and can be applied to solar photo-thermal power generation experiments in different forms; and through the solar simulator, light spots can be automatically focused on, the sizes of the light spots can be continuously adjusted, and then the demand of the solar photo-thermal power generation experiments in the field of solar photo-thermal power generation can be met.