31results about How to "Not difficult to operate" patented technology

A step-by-step recursive nanoscale measurement system based on a high-precision electric probe, including a control part, an iron core (9) placed between a first coil (10) and a second coil (8); a measuring rod (7 ), one end of which is connected to the iron core (9), and the other end is connected to the measuring rod contact (5); the upper and lower ends of the nano-scale micro-feeding device (6) are fixed on the measuring rod (7). The micro-displacement of the object (4) provides the feed amount; the control part controls the micro-feeding device (6) with nanometer-level precision according to the displacement of the object to be sided. The present invention adopts a step-by-step recursive method for micro-displacement measurement, on the one hand, the nano-level measurement is easy to realize, and on the other hand, the whole measurement system has a larger measurement range. Therefore, the nanoscale feeding device determines that the measurement system has high measurement accuracy. The measurement system adopts contact measurement, so this system is suitable for quasi-static micro-displacement measurement.

The invention provides a bone-imitative composite material scaffold and a preparation method thereof. The natural wood is de-lignified, and then compounded with hydroxyapatite to obtain an osteoinductive scaffold material, and the extracellular The matrix is ​​simulated to obtain the bone-mimetic composite scaffold. The invention obtains a highly anisotropic porous scaffold, and the three-dimensional pore structure provides channels for the transport of nutrients and intracellular growth and regeneration, overcomes the shortcomings of traditional isotropic scaffold materials and meets the strength and stability requirements of bone tissue regeneration. The method does not need to use special reagents and equipment, the operation is not difficult, the process conditions are mild, and it has the characteristics of easy production and popularization and application.

The invention relates to a method for controlling grain equi-axiation to improve plasticity of a Ti20Zr6.5Al4V alloy. The method mainly comprises the steps that a Ti20Zr6.5Al4V alloy bar is cut into a round ingot with the thickness being 16 mm, and the round ingot is cleaned up; the round ingot is put into a resistance furnace to be heated till the temperature ranges from 950 DEG C to 1,050 DEG C, heat preservation is carried out for 20 min to 40 min, and the round ingot is quickly placed in water for quenching after being taken out; then the alloy ingot is heated till the temperature ranges from 750 DEG C to 900 DEG C at the speed being 10 DEG C / min, the heat preservation time is shorter than 5 min, the alloy ingot is subjected to rolling deformation through a dual-roller mill after being taken out, the rolling speed ranges from 0.3 m / s to 0.6 m / s, and the reduction in single pass ranges from 0.5 mm to 2 mm; heating-rolling is repeated 5-20 times in the same way till deformation reaches 60% or above, and air cooling is carried out until the room temperature is obtained; and then the alloy is subjected to annealing treatment after being heated, the annealing temperature ranges from 750 DEG C to 850 DEG C, and furnace cooling is carried out until the room temperature is obtained after heat preservation is carried out for 1 h to 12 h. According to the method, operation is easy, and the production cost is low; and the plasticity of the alloy is remarkably improved while strength is guaranteed.

The invention discloses a method for filling the bottom of an embedded steel plate of a support. The method comprises the following steps: 1, pouring a concrete support foundation layer; 2, a template and a material guiding strip are installed; thirdly, backfill materials are poured from the feeding port; 4, pouring and exhausting the bottom of the embedded steel plate; and fifthly, the support and the embedded steel plate are integrally formed. According to the method, a two-time pouring mode is adopted, the purposes that the bottom of the support embedded steel plate is densely poured, and follow-up drilling and grouting operation is not needed can be achieved, the operation difficulty is low, the construction quality is controllable, safety, reliability, economy and reasonability are achieved, and the bottom of the support embedded steel plate can be efficiently and rapidly tamped.

The invention relates to a preparation method of 1,2,4-trifluoro-benzene, belonging to the technical field of preparation methods of chemical drug intermediates. The preparation method comprises the following steps of: (1) generating salifying reaction on 3,4-difluoroaniline and fluoboric acid, and then generating diazotization reaction with sodium nitrite to obtain fluoboric acid diazonium salt;and (2) under the solvent-free condition, carrying out high-temperature cracking reaction on the fluoboric acid diazonium salt at the temperature of 80-300 DEG C to obtain 1,2,4-trifluoro-benzene. The preparation method has the advantages of cost saving of raw materials, relatively simple process flow, mild reaction condition, low operation difficulty, operability and convenient aftertreatment; and the prepared products have the purity increased to 98 percent or more now from 80 percent or less originally, are stable in quality, and are suitable for large-scale industrial production.

The invention provides a device for compensating the difference of height by which a helicopter lands on a non-horizontal ground and the method thereof, which aim at addressing the problem that the helicopter lands on the non-horizontal ground. The device comprises three ranging sensors used for testing the pitch angle and spinning angle of the non-horizontal ground, three leg-type landing gears comprising a landing platform fixedly connected with the body of the helicopter and three landing supporting legs fixed on the landing platform and a control device respectively electrically connectedwith three ranging sensors and three power output devices; power output devices independent of each other are arranged between each landing supporting leg and the landing platform. When the helicopter lands, the measurement results of the ranging sensors are used for calculating the pitch angle and spinning angle of the non-horizontal ground and then controlling the pitch angle and spinning angleof the plane on which three landing ends of three landing supporting legs to be equal to the pitch angle and spinning angle of the non-horizontal ground so that the helicopter can be controlled to land vertically.

The invention discloses a three-dimensional carbon nano phase composite reinforced aluminum base material and a preparation method thereof. It is to firstly immerse the aluminum powder in the ethanol solution containing bisphenol A diglycidyl ether and nickel nitrate hexahydrate, stir magnetically and add ethylenediamine dropwise to obtain the surface-treated aluminum powder, and then pass the surface-treated aluminum powder through After reduction, it is mixed with graphene oxide and subjected to low-speed ball milling, and then reduced to obtain three-dimensional carbon nanophase-coated aluminum powder. Finally, these aluminum powders are subjected to SPS sintering and cold rolling to obtain a three-dimensional carbon nanophase composite reinforced aluminum matrix. Material. The process of the invention is simple and easy to operate, and the cost is low. The obtained composite reinforced aluminum-based material enhances the load transfer efficiency by constructing a three-dimensional carbon nanophase, thereby significantly improving the mechanical properties of the aluminum-based composite material, so that it not only has high tensile strength, but also Maintain good elongation and toughness, and have good scalability.

The invention relates to the field of sintering technology, and specifically discloses a semiconductor glaze layer sintering method for improving the matching degree of semiconductor components and a central electrode, which is used for sintering a semiconductor glaze layer on a porcelain tube, and is characterized in that: firstly, the center electrode wax is made according to the shape and size of the center electrode Then fit the porcelain tube with the wax mold of the center electrode, inject the pre-configured semiconductor enamel into the gap between the outer cone surface of the center electrode and the inner cone surface of the porcelain tube, and put it into the furnace for heating after the semiconductor enamel cools naturally sintering. The semiconductor glaze layer sintered by the method for sintering the semiconductor glaze layer can improve the matching degree between the semiconductor component and the central electrode, thereby avoiding the increase of the insulation resistance between the central electrode and the semiconductor component due to the poor coordination between the central electrode and the semiconductor component, and improving the electric resistance. Mouth pyrogenicity.