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42results about How to "Guaranteed equivalence" patented technology

Automatic production line system for coating and maintaining buoys and application method thereof

The invention discloses an automatic production line system for coating and maintaining buoys and an application method thereof. The system comprises a hanging and conveying device, a blasting cleaning plant, a shot blasting cleaning plant and a drying unit; all the devices are provided with hanging type loading workpieces; the hanging type loading workpieces are used for realizing ascending and descending, walking and autorotation of the buoys in the process of cleaning the blasting and shot blasting, spraying painting and drying.The application method comprises: a. a trolley is moved to a ring-shaped rail to hoist buoys; b. the buoys enter a cleaning room to carry out blasting and shot blasting; c. the buoys enter a spray room to be painted; d. the buoys enter a drying room to be dried; e. the buoys once again enter the spray room to be painted once again; f. the buoys are dried once again. In the invention, the workpieces are loaded in a hanging manner, the lifting appliances can ascend and descend, walk and automatically rotate. Blasting and shot blasting cleaning, paint spraying, three-station drying are completed respectively to form an automatic coating processing production line; and in addition, program control is realized and a high degree of automation is enjoyed.
Owner:青岛铸造机械集团公司 +1

Method for constructing pore throat sections of rock pore network model by considering concavity and convexity

ActiveCN105427383ASeepage parameters are accurateAccurate characterization of porous media3D modellingThroatRock core
The invention discloses a method for constructing pore throat sections of a rock pore network model by considering concavity and convexity in the technical field of image processing. The method comprises main steps of scanning a real rock core based on a CT technology and performing three-dimensional reconstruction; performing pore throat segmentation on the three-dimensional rock core, performing numbering and sorting on all pore throats, and making statistics on pore throat geometric parameter information; obtaining a relationship between a maximum inner angle of a quadrangle and a shape factor by utilizing a numerical experiment; determining the maximum inner angle of the quadrangle according to the concavity and convexity and the shape factor; making a diagonal line from a vertex of the angle, dividing the maximum inner angle into two parts, and determining the length of the diagonal line; establishing a section nonlinear feature equation and calculating the side length of the quadrangle with a Newton iteration method; and checking whether the feature equation has a positive solution and conforms to physical significance or not, and if not, performing reconstruction until all the pore throat sections are constructed. According to the method, the concavity and convexity of the cross section and the equivalency of the hydraulic radius of a porous medium are fully considered, so that the accuracy of representing the real porous medium by the pore network model is improved and a seepage parameter of the porous medium can be accurately predicted.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Air-uniformizing and thermoforming baking oven

The invention relates to an air-uniformizing and thermoforming baking oven which comprises an oven body, a heater, a conveying chain plate, a suction hood, a reflux pipeline and a draught fan, wherein the bottom of the oven body is provided with an air uniformizing device which is composed of an air inlet pipe and an air uniformizing chamber; one end of the air inlet pipe is connected with the draught fan, and the other end of the air inlet pipe is connected with the air uniformizing chamber; the air uniformizing chamber comprises an end plate, two side plates and a bottom plate; the end plate is provided with an air inlet; the air inlet pipe is connected with the air inlet; multiple inclined air deflectors are arranged in the air uniformizing chamber; flow channels are respectively formed between the multiple air deflectors and the bottom plate and are connected with the air inlet; one ends of the multiple air deflectors are respectively connected with the end plate, and the other ends of the air deflectors are parallel to one another and are respectively provided with multiple air outlets. The air-uniformizing and thermoforming baking oven can be used for not only ensuring that air absorbs the same heat in the heater and thus the service life of the heater is prolonged, but also ensuring that fibers absorb the same quantity of heat and thus the fiber thermoforming degree is stabilized, and further ensuring the product quality consistency.
Owner:NINGBO DAFA CHEM FIBER

Digital frequency selection measuring system capable of resisting one hundred thousand times of interference

InactiveCN102645577AStrong frequency selection and anti-interference abilityGuaranteed equivalenceVoltage-current phase angleMeasurement using digital techniquesVIT signalsEngineering
A digital frequency selection measuring system capable of resisting one hundred thousand times of interference relates to the technical field of measurement. A voltage measurement function front-end circuit of the digital frequency selection measuring system comprises a voltage measuring terminal, an automatic range switching unit, a filter circuit unit and an isolation and amplification unit, a CPU (central processing unit) transmits a signal to control the automatic range switching unit to automatically switch ranges, the automatic range switching unit is connected to the filter circuit unit, the filter circuit unit is connected to the isolation and amplification unit, and output of the isolation and amplification unit is connected to the CPU. A current signal of a current measuring terminal is inputted to an automatic range switching unit, the CPU transmits a signal to control the automatic range switching unit to automatically switch ranges, the automatic range switching unit is connected to a filter unit, the filter unit is connected to an operational amplification unit, the operational amplification unit is connected to the CPU, and the CPU carries out analytic processing. The digital frequency selection measuring system can realize frequency selection measurement with resistance to one hundred thousand times of interference on the basis of +/-1Hz, and has important application in the field of electric measurement, particularly in the field of test of electric systems under the background with high interference.
Owner:上海大帆电气设备有限公司

Method for preparing PBO (piperonyl butoxide) polymer by taking 2-(p-formylchloride phenyl)-5-amino-6-hydroxybenzoxazole as raw material

ActiveCN103881092AReduce dosageAvoid the problem of poor reactivity and solubilityPolymer scienceWarming process
The invention relates to a method for preparing a PBO (piperonyl butoxide) polymer by taking 2-(p-formylchloride phenyl)-5-amino-6-hydroxybenzoxazole as raw material. The invention relates to a preparation method of a PBO polymer and aims at solving the problems of long reaction period and large using quantity of corrosive raw material of the existing method for synthesizing the PBO polymer. The preparation method comprises the following steps: 1) preparing a polyphosphoric acid solution; 2) adding an AB type PBO monomer into the polyphosphoric acid solution, and continuously supplementing P2O5 in the heating process to obtain an initial reaction solution; 3) performing gradient heating on the initial reaction solution obtained in the step 2) to prepare a polymer solution; 4) placing the polymer solution in deionized water to soak, and then performing vacuum drying to obtain the PBO polymer. According to the method disclosed by the invention, the PBO polymer with high molecular weight is generated in a polyphosphoric acid system after short-time polymerization, the using quantity of the corrosive raw material P2O5 is reduced, and the total consumed time in the polymerization stage can be shortened to 5-12 hours.
Owner:HARBIN INST OF TECH

Method for solving conditional nonlinear optimal disturbance based on analysis of four-dimensional set variation

The invention discloses a method for solving conditional nonlinear optimal disturbance based on analysis of four-dimensional set variation. The method comprises the following steps: constructing a conditional nonlinear optimal disturbance objective function according to a marine forecasting model, and obtaining an objective function gradient formula; solving an increment matrix at the forecasting moment of the disturbance value matrix; rewriting an adjoint operator in the gradient formula, and rewriting the adjoint operator part in the gradient formula of the conditional nonlinear optimal disturbance objective function into a form related to a generalized ocean background state error covariance matrix; and solving the conditional nonlinear optimal disturbance of the ocean forecasting model through loop iteration. Compilation of an adjoint mode is avoided, portability is good, an error covariance matrix which is continuously updated is used, solving is more accurate, equivalence with a traditional algorithm is guaranteed when forecasting mode integration time is long and strong nonlinearity exists, the method is even superior to the traditional algorithm, the applicability of the CNOP method is greatly improved. And the invention is of great significance to development of atmosphere-ocean predictable research.
Owner:TIANJIN UNIV

Reduced scale equivalent physical experiment method for electric transmission line

The invention discloses a reduced scale equivalent physical experiment method for an electric transmission line, and belongs to the technical field of high voltage overhead power transmission. The method comprises the steps that firstly, an electric transmission line reduced scale equivalent physical experiment is set in an ultra-long distance and large-capacity half-wavelength (3,000 km) power transmission mode; secondly, three reduced scale schemes of an equal proportion reduced scale, an equal electric conductivity reduced scale and an equal radius reduced scale are provided according to the relation among the reduced scale multiple, frequency and half wavelength of the electric transmission line reduced scale equivalent physical experiment; the equal electric conductivity reduced scale scheme is selected preferentially through calculation and comparison. Compared with an existing method for researching electric transmission line transmission characteristics, the equivalence before and after the electric transmission line reduced scale can be ensured, and a real electric transmission line is accurately simulated. The method has the advantages that a circuit is easy to construct and the equivalence is good, and has the good application prospect on the occasion that the electric transmission line needs to be used for performing an experiment.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +3

Power semiconductor device for testing gate pole current

The invention discloses a power semiconductor device for testing a gate pole current. The device comprises a power semiconductor chip and a tube shell. The power semiconductor chip comprises a plurality of first insulating layers and a plurality of sub gate pole annular electrodes; the first insulating layers divide a gate pole common metal region of the power semiconductor chip into a plurality of sub gate pole common metal regions, and the plurality of sub gate pole common metal regions are connected with the plurality of sub gate pole annular electrodes in a one-to-one correspondence manner; the tube shell comprises a plurality of sub gate pole contact rings and a plurality of sub-insulating seat inner metal rings, and the sub gate pole contact rings and the sub insulating seat inner metal rings are arranged with the plurality of sub gate pole annular electrodes in a one-to-one correspondence manner; and a plurality of square grooves are formed in a cathode copper block on the outerside of a tube shell gate pole groove, and gate pole leading-out strips are arranged in the square grooves so as to lead out gate pole currents on the corresponding sub gate pole annular electrodes respectively. The power semiconductor device can effectively lead out gate pole currents of different cathode strip-shaped areas in the power semiconductor chip so as to achieve a purpose of measurement.
Owner:TSINGHUA UNIV

Composite insulator umbrella skirt unevenness aging test platform and using method thereof

The invention discloses a composite insulator umbrella skirt unevenness aging test platform and a using method thereof. An umbrella-shaped support skeleton with the same shape and the same size as thecomposite insulator umbrella skirt is constructed, and the umbrella-shaped support skeleton is mounted on a vertical column to form a test platform; samples are evenly mounted on the outer surface ofthe umbrella-shaped support skeleton; the test platform provided with the samples is placed in an outdoor environment for aging test, a direction indicator is used to indicate the mounting directionof the test platform, and through an environmental sensor, environmental data are recorded; after a test period is reached, an umbrella-shaped support skeleton drawing is printed, the position and thedirection of a direction arrow are marked on the printed drawing on the spot, the samples are removed from the umbrella-shaped support skeleton one by one and are numbered, a sample number is filledat a corresponding position on the drawing, the samples on each layer of the umbrella-shaped support skeleton need to be filled in a drawing, and a layer number of the umbrella-shaped support skeletoncounting from top to bottom is marked closely near the drawing; and the taken sample is subjected to subsequent aging performance analysis and detection.
Owner:STATE GRID HUNAN ELECTRIC POWER +2

Partial node big data service system and method

The invention relates to a partial-node big data service system, and the system comprises a speed recognition device which is disposed in a helmet of a player who carries out a steel frame snowmobile project, and is used for measuring the current traveling speed of the helmet; the signal conversion device is used for sending a signal for requesting to capture a field super-definition picture when the received current advancing speed exceeds or is equal to the minimum competition speed; and the racing track speed reduction equipment is used for executing inclination processing on a racing track in front of the current position of the helmet after receiving the speed reduction request instruction so as to execute speed reduction operation on the upcoming steel frame snowmobile. The invention further relates to a partial node big data service method. According to the invention, when it is detected that a player of a steel frame snowmobile item is in a top speed state at present, whether the player is seriously lost in posture or not is judged based on the left-right symmetry degree of the ice surface of the front racing track, and corresponding racing track deceleration processing and vehicle body deceleration processing are executed when the player is judged to be seriously lost in posture, so that the emergency capability of competition management is improved.
Owner:奥菲(泰州)光电传感技术有限公司

A reduced-scale equivalent physical experiment method for transmission lines

The invention discloses a reduced scale equivalent physical experiment method for an electric transmission line, and belongs to the technical field of high voltage overhead power transmission. The method comprises the steps that firstly, an electric transmission line reduced scale equivalent physical experiment is set in an ultra-long distance and large-capacity half-wavelength (3,000 km) power transmission mode; secondly, three reduced scale schemes of an equal proportion reduced scale, an equal electric conductivity reduced scale and an equal radius reduced scale are provided according to the relation among the reduced scale multiple, frequency and half wavelength of the electric transmission line reduced scale equivalent physical experiment; the equal electric conductivity reduced scale scheme is selected preferentially through calculation and comparison. Compared with an existing method for researching electric transmission line transmission characteristics, the equivalence before and after the electric transmission line reduced scale can be ensured, and a real electric transmission line is accurately simulated. The method has the advantages that a circuit is easy to construct and the equivalence is good, and has the good application prospect on the occasion that the electric transmission line needs to be used for performing an experiment.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +3

A uniform air heat setting oven

The invention relates to an air-uniformizing and thermoforming baking oven which comprises an oven body, a heater, a conveying chain plate, a suction hood, a reflux pipeline and a draught fan, wherein the bottom of the oven body is provided with an air uniformizing device which is composed of an air inlet pipe and an air uniformizing chamber; one end of the air inlet pipe is connected with the draught fan, and the other end of the air inlet pipe is connected with the air uniformizing chamber; the air uniformizing chamber comprises an end plate, two side plates and a bottom plate; the end plate is provided with an air inlet; the air inlet pipe is connected with the air inlet; multiple inclined air deflectors are arranged in the air uniformizing chamber; flow channels are respectively formed between the multiple air deflectors and the bottom plate and are connected with the air inlet; one ends of the multiple air deflectors are respectively connected with the end plate, and the other ends of the air deflectors are parallel to one another and are respectively provided with multiple air outlets. The air-uniformizing and thermoforming baking oven can be used for not only ensuring that air absorbs the same heat in the heater and thus the service life of the heater is prolonged, but also ensuring that fibers absorb the same quantity of heat and thus the fiber thermoforming degree is stabilized, and further ensuring the product quality consistency.
Owner:NINGBO DAFA CHEM FIBER
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