59results about How to "The method is simple and direct" patented technology

The invention relates to a direct calibration method for a line structured light vision sensor. The method comprises the following steps: establishing a target formed through standard gauge blocks and by utilizing a three-dimensional precision translation bench; projecting structured light plane to the target through the line structured light vision sensor to form feature points on the target; establishing a space coordinate system on the target; collecting target images and extracting the feature points; establishing a search index table including establishing a direct mapping relation between image coordinates of the feature points and space coordinate system coordinates of the feature points; carrying out calibration on the line structured light vision sensor; and based on the image coordinate of a point to be calibrated, searching the space coordinate system coordinate, which is obtained directly or obtained by utilizing a least squares fitting method, of the point in the search index table, so that the direct calibration of the line structured light vision sensor can be realized. The calibration method is used for the line structured light vision sensor which belongs to the small vision field high precision measurement application field. The calibration method is simple and direct, easy to realize, high in precision and can meet the need of measurement.

The invention belongs to the field of magnetic catalysts, and particularly relates to Ag-Fe3O4 magnetic nano-catalysts compounded under the action of polymers and their application in a styrene catalytic epoxidation system. The synthesis method is to use Fe3Cl6·6H2O and AgNO3 as raw materials to synthesize Ag-Fe3O4 composite magnetic nano-catalyst in ethylene glycol system containing NaAc by solvothermal technology with the assistance of polymer PVP; this catalyst can be used to use TBHP as oxidant, Styrene epoxidation system with toluene as solvent. The preparation method of the present invention is simple, the reactants are cheap and easy to obtain, the solvent pollution is small, the synthesis time is low, the catalyst can be conveniently separated from the reaction system under the action of an external magnetic field, and the problem that the non-magnetic nano-catalyst is difficult to recover is solved. The catalyst showed excellent catalytic activity and stability for styrene epoxidation, the yield of ethylene oxide was 84.0%, and there was no deactivation phenomenon after repeated use.

The invention relates to a method for directly generating digitalized shoe trees by using foot shapes, solving the difficult problem of customizing shoe trees by measuring feet. The method comprises the following steps: (1) selecting shoe tree samples to form a shoe tree sample set; (2) designing gauge points, determining gauge points on each shoe tree sample and then acquiring the positions of the gauge points by using a scanner to obtain gauge point distribution models of the shoe tree samples; (3) aligning the gauge point distribution models of the samples; (4) generating statistic deformation models of the shoe trees; (5) calibrating the parameter of each camera and then acquiring a plurality of images of target foot shapes; (6) calculating the center of gravity of the foot shapes; (7) estimating the sizes of the foot shapes; (8) estimating the direction of the foot shapes; (9) changing individual vectors in the statistic deformation models of the shoe trees according to the plurality of images of the foot shapes until the projection of the models in each image is most identical with the true images of the foot shapes; and (10) outputting digitalized three-dimensional shoe tree models. The invention has the advantages of full automation, high speed and efficiency, simple use, low cost and the like.

A method and system are described to treat ammonia-containing wastewater or process waters. Sewage containing human or animal waste and certain process liquids, typically water, contains high levels of nitrogen in the form of ammonia. An electro-chemical method to extract the ammonia from the wastewater is also described. The system described is one implementation of this method. One or more electrolysis cells convert ammonium to ammonia where the generated ammonia gas can readily be extracted for disposal or reuse. Such a system can involve electrolysis cells of numerous types as described herein.

The method uses main structure of blower fan including sizes of geometry, quantity of blade, obliquity etc. as basic parameters to establish mathematical model. Different geometric parameters as variables are changed, and real objects are manufactured for test so as to obtain a series of experimental data, which shows relation between each geometric parameter and value of energy efficiency. Using neural network tool of radial basic function (RBF) builds model library. For products of blower fan needed to modify, using the model in the model library according to structure type of blower fan, and values of geometric parameters can predict anticipant value of energy efficiency to be obtained if blower fan is manufactured according to parameters adjusted by offsets. The invention also discloses modified strategy in structure type and values of geometric parameters of blower fan. Features are: easy of implementation, low cost, and suitable to medium and minor enterprises.

The invention discloses a multi-color wheel synchronization method and a laser projection device. A first area in a wheel surface of a first color wheel is detected through a first sensor group, and a first level jump signal is generated when the first color wheel detects the first area for the first time during each rotation cycle; a second area in a wheel surface of a second color wheel is detected through a second sensor group, and a second level jump signal is generated when the second color wheel detects the second area for the first time during each rotation cycle; and whether the time difference between the first level jump signal and the second level jump signal is a threshold is judged, and if not, the rotation speed of the first color wheel and/or the second color wheel is adjusted to enable the time difference between the first level jump signal and the second level jump signal to be the threshold.

A superparamagnetic Fe3O4 nanometer particle with polymer modification from one-step synthesis is prepared by adding polymer monomer and ferrous salt with mol ratio 1í½20:1 into anaerobic distilled water, stirring under nitrogen protection at 75í½100íÒ, dripping into mixed solution of disulfide acid salt and base, reacting for 30í½60mins, and obtaining magnetic nanometer particle sol coated by black polymer with polymer concentration 0.05í½0.3M and ferrous salt concentration 0.005í½0.05M. Its advantages include stable dispersion, simple process, short time and high productivity.

The invention relates to a method for producing deep ultraviolet laser light through visible laser direct frequency conversion and an all-solid-state deep ultraviolet laser. According to the method, a pumping source pumps a gain medium to directly produce visible light, ultraviolet light is obtained through a double-frequency crystal according to the visible light, and laser light in a deep ultraviolet band is obtained through a triple-frequency crystal. The all-solid-state deep ultraviolet laser comprises a pumping source, a focusing system, an input mirror, a laser gain medium, a double-frequency crystal, a plane-concave output mirror, a triple-frequency crystal, and a reflective mirror. The device has the advantages of compact structure, simple operation, small size, and easy integration. The method for acquiring deep ultraviolet laser light has the characteristics of concise process and high conversion efficiency.

The invention relates to a Lagrange Gaussian beam Gouy phase parameter measuring method. In the prior art, an optical path structure is complicated, restriction from optical beam coherence is obtained and the measurement in an optical system with high sensitivity and high numerical aperture cannot be realized. According to the invention, the method comprises the following steps of: carrying out sector light shielding modulation on beam wave front by using wave front amplitude modulation technology of the Lagrange Gaussian beam; and selecting beam radial parameters as zero, wherein a circular ring shaped light spot with a gap is formed after beams are gathered; detecting the circular ring shaped light spot with the gap by using a near field optical technology, wherein azimuth angle parameter corresponding to the center of the gap is fundamental mode beam Gouy phase; and obtaining the Gouy phase of any Lagrange Gaussian beam in different spreading positions through simple calculation. The Lagrange Gaussian beam Gouy phase parameter measuring method provided by the invention has the characteristics of simplicity for realization, low requirement on structure positioning, high reliability, strong anti-interference performance, capability of realizing direct measurement with high sensitivity, capability of measuring the Gouy phase in the optical system with high numerical aperture, wide application range and the like.

The invention discloses a method for preparing m-phenylenediamine by taking nitrochlorobenzene meta-position oil as a raw material. The method comprises the following steps of (1) nitrification of thenitrochlorobenzene meta-position oil, wherein the nitrochlorobenzene meta-position oil is added into concentrated sulfuric acid, the temperature rises, fuming nitric acid is added dropwise, a reaction is carried out, standing is carried out for removing waste acid, and a mixture of 2,4-nitrochlorobenzene and 3,5-dinitrochlorobenzene is obtained; (2) a catalytic hydrogenation reaction, wherein themixture of the 2,4-nitrochlorobenzene and the 3,5-dinitrochlorobenzene is taken as a raw material, methyl alcohol is taken as a solvent, an alkaline substance is taken as an acid-binding agent, precious metal palladium carbon is taken as a catalyst, hydrogen is introduced, and the m-phenylenediamine is obtained. The novel method for treating the nitrochlorobenzene meta-position oil is found, which can turn waste into wealth; compared with other methods for treating the meta-position oil, the method is simple and direct, and meets the requirement of the atomic economic benefit; other unnecessary side reactions cannot be generated, and the process is simple and easy to operate; compared with a method for preparing the m-phenylenediamine through the reduction of m-dinitrobenzene, the methodis more environmentally friendly, and low in cost.

The invention relates to an optimized design method for an impeller blade of an axial flow fan. According to the optimized design method, an optimality principle and a numerical calculation method are used; and under the condition that design parameters of the axial flow fan and various engineering constraint conditions are met, the flow pattern of the impeller blade of the axial flow fan is reasonably selected, and structural parameters of the impeller blade of the axial flow are reasonably calculated, so that the efficiency of the axial flow fan is improved, and the size and the weight of the axial flow fan are reduced. Excel can also be used to complete the whole optimized design process of the axial flow fan, the flow pattern and the various structural parameters, such as the diameter of the impeller blade, the hub ratio and the amount of the impeller blade, of the impeller blade can be adjusted according to the design parameters of the axial flow fan, and a plurality of design schemes can be rapidly compared so as to select an optimal scheme from the design schemes. According to the optimized design method for the impeller blade of the axial flow fan, problems of low calculation accuracy, time-consuming and labor-consuming calculation, long design periods and the like existing in current aerodynamic designs of the axial flow fan are solved, the efficiency of the axial flow fan is improved, the method is simple and direct, design time is greatly shortened, design accuracy is greatly improved, costs are low, and usage of mass fan enterprises is facilitated.

The invention provides a method for recycling waste polyurethane foam and an application; the waste polyurethane foam material recycled by the method has the characteristics of simplicity and directness, and an obtained carbon material matrix can be directly or indirectly applied to an electrode material. The method for recycling the waste polyurethane foam comprises the following steps: 1) pre-carbonization treatment: under the protection of inert gas, heating a waste polyurethane foam material to 350-500 DEG C, calcining for 0.5-24 h, and then cooling to room temperature to obtain a pre-carbonized carbon material; and 2) carbonizing treatment: under the protection of inert gas, heating the pre-carbonized carbon material obtained in the step 1) to 800-1600 DEG C, and calcining for 0.5-24h to obtain a carbon material matrix.

The invention discloses a breeding method of a trichoderma harzianum high-yielding strain for preventing and controlling potato root rot. The trichoderma harzianum high-yielding strain is obtained through breeding via the steps of ultraviolet mutagenesis on an original strain, inoculation into a fermentation bottle, filtering of fermentation broth, preparation of a culture plate, and resistance screening; according to the quantity determined through strain breeding, a strain with a big bacterium inhibition zone on pathogenic bacteria of fusaria of the potato root rot is preferably selected forseparation purification and passage; and the fast screening of the trichoderma harzianum high-yielding strain is completed. The breeding method of the trichoderma harzianum high-yielding strain provided by the invention has the advantages that the strain breeding efficiency can be effectively improved, so that the strain breeding period can be shortened; the strain breeding needs 6 to 8 generations of breeding before, and the strain breeding can be completed only through 3 to 4 generations now; and the time is shortened by a half. The strain screening efficiency and the excellent strain breeding accuracy are improved, so that an excellent strain can be provided for trichoderma harzianum fermentation; and reliable guarantee is provided in an aspect of preventing and controlling the potatotrichoderma harzianum root rot.

A method for the transformation of image signals that have been obtained by color filtering and have been logarithmically compressed is proposed. The color saturation of the recorded images is increased thereby. According to one aspect of the invention, the transformed image signals are determined as a function of the logarithmically compressed image signals and the logarithmically compressed brightness signals for a spectral color.