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80results about How to "Help design" patented technology

Battery management system and battery management method

The invention provides a battery management system and a battery management method. The battery management system comprises a battery pack controller, N single battery controllers, N isolation transformers and a pair of multiplex buses; the battery pack controller is connected to the multiplex buses and used for managing a battery pack, each single battery controller is connected to the multiplex buses through one isolation transformer, the battery pack comprises N single batteries which are connected in series, each single battery controller manages one single battery, time division multiplexing is performed on the multiplex buses, therefore, the battery pack controller and the single battery controllers can achieve power transmission and signal transmission through the multiplex buses, the system design and implementation difficulty is lowered, and the system is beneficial for lowering the cost. Furthermore, each single battery controller and the corresponding single battery are arranged to be adjacent to each other in the space, therefore, the single battery controllers and the single batteries can be combined together at the structure level, historical data of the batteries is stored, and secondary use of the batteries is convenient.
Owner:HANGZHOU SILAN MICROELECTRONICS +1

Method for measuring powder body material electric conductivity and electric conductivity measuring apparatus suitable for the method

The invention provides a method for measuring the conductivity of the powder material. The method comprises the following steps: (a) keeping the powder material to be measured in a cylinder shape and applying a certain pressure P to the powder material until the shape of the cylinder powder body can be kept stable; (b) measuring the length L, the cross-sectional area S and the resistance R of thecylinder powder body; and (c) calculating the conductivity of powder material based on the formula that Sigma is equal to L divide (R multiply S). The invention further provides a device for measuring the conductivity, which comprises a powder container, two conductive pistons, a pressure device, and a resistance measuring device. By adopting the method and the device, the conductivity of the powder material to be measured in a pressurized state can be measured, thereby the conductivity of the powder material to be measured in an operating pressure can be quantitatively provided. The relationship of the conductivity of the powder material to be measured varying with the pressure P can be obtained through changing the pressure value of the powder material to be measured and measuring the conductivity thereof. The method facilitates the selection of the electrode material, the optimization of the electrode material formulation and the integrated design of the battery system.
Owner:SHENZHEN BAK POWER BATTERY CO LTD

Unmanned aerial vehicle directional navigation method, GNSS receiver device and GNSS receiver system

The invention discloses an unmanned aerial vehicle directional navigation method, a GNSS receiver device and a GNSS receiver system. The system comprises the GNSS receiver device, a first GNSS satellite receiving antenna and a second GNSS satellite receiving antenna, wherein the GNSS receiver device comprises a GNSS satellite signal processing unit, a directional navigation processing unit, a positioning navigation processing unit, a differential data processing unit and a positioning and directional navigation result generating unit. Two GNSS receiving antennas are adopted to provide autonomous difference and offset common errors; through a lengthened baseline mounting mode of the two antennas on an unmanned aerial vehicle carrier, the directional navigation precision is improved; due tothe positioning difference processing, the measurement accuracy of a dual-antenna baseline vector is improved; due to the accurate directional navigation, various and optimized autonomous flight routes can be designed; the integration and the independence of the module are improved, a product can be formed easily, and the productibility is improved; and accurate course navigation for the unmannedaerial vehicle carrier can be realized, and the problem of inconsistency flight area overlapping between flight routes can be solved.
Owner:GUANGZHOU HI TARGET NAVIGATION TECH

Method for calculating thickness of end socket of fiber wound composite shell

The invention relates to a method for calculating the thickness of a shell cover of a fiber wound composite material, which comprises the following steps of: obtaining a fiber track corresponding to an actual winding line type by solving differential equations of a winding angle and a core model corner; and calculating the fiber bundle side line of the end socket section by adopting a geodesic line offset method. In consideration of the continuous change of the curvature radius of the end socket section, the fiber bundle is divided into a plurality of small sections, and then each small section approximately considers that the offset angle of the geodesic line is not changed, so that an offset point can be easily calculated on each small section until the boundary is calculated. In order to facilitate numerical calculation of the intersection point of the reference line and the fiber bundle sideline, a rectangular coordinate of the fiber bundle sideline is converted into a polar coordinate, so that the intersection point of the reference line and the fiber bundle sideline can be easily calculated by adopting a linear difference method. By adopting the method, the seal head thickness curve of the seal head in any shape under any winding linearity can be calculated, so that the influence rule of the winding linearity on the seal head thickness can be researched.
Owner:陕西道博飞科新材料技术有限公司

Ultra-high temperature pulverized coal combustion experiment device

The invention discloses an ultra-high temperature pulverized coal combustion experiment device, belongs to the technical field of blast furnace ironmaking, and solves the problem of combustion ratio detection of pulverized coal under an ultra-high temperature condition. Meanwhile, the device can be applied to combustion ratio detection of novel fuels such as biomass. The device comprises a gas mixing tank, a gas preheating furnace, a gas accelerator, a pulverized coal screw feeder, a flow meter, a rapid cut-off valve, a mixing pipe, an electric arc combustion chamber, an electric arc control cabinet, a dust collector, a secondary dust remover, a gas analyzer, a computer, a data wire and a tail gas treatment device. By adopting the ultra-high temperature pulverized coal combustion experiment device, the pulverized coal can be evenly and continuously sprayed into the combustion chamber according to different flows; meanwhile, hot air is accelerated by adopting the gas accelerator; ultra-high temperature pulverized coal is generated by adopting the electric arc combustion chamber; the combustion state of the pulverized coal can be closer to the actual work condition of a blast furnace. Therefore, reasonable technological parameter and coal injection scheme are provided for efficient combustion of the pulverized coal of the blast furnace.
Owner:UNIV OF SCI & TECH BEIJING

Image processing method for chest X-ray DR (digital radiography) image rib inhibition

The invention discloses an image processing method for chest X-ray DR (digital radiography) image rib inhibition. The method comprises the following steps: acquiring a chest X-ray DR image; performing pyramid decomposition on the DR image, performing a down sampling process to obtain a Gaussian image pyramid S, and performing an up sampling process to obtain a Laplacian image pyramid difference chart D(S); taking the minimum S as a current to-be-processed image I; performing filtering processing on the image I by using an adjustable Gabor filter bank so as to obtain a reconstructed image R; differencing the to-be-processed image I and the reconstructed image R to obtain a processing result image E with weakened segment-shaped textures under the scale; and doubling the processing result image E, adding the processing result image E and a corresponding Laplacian image pyramid difference chart D(S) under the size together, and repeating the processing procedure until the size is the same as that of an original DR image, thereby obtaining an image after rib inhibition. According to the method disclosed by the invention, the visual saliency of pulmonary shadows is improved, the workload of doctors is reduced, automatic processing can be realized, and an analysis conclusion is more objective and stable.
Owner:SICHUAN UNIV

Material structure quantitative analysis method based on transmission electron microscope HAADF image

The invention provides a material structure quantitative analysis method based on a transmission electron microscope HAADF image. The method is characterized by obtaining the coordinate position of each atom lattice in a transmission electron microscope high-resolution image through the image processing technique to obtain integral intensity of each atom and neighbourhood normalized intensity; and by fully combining the relation between HAADF imaging principle and intensity information, obtaining some quantitative information on the basis of qualitative research of the HAADF image. Through the data of the atomic lattice coordinates and normalized intensity and the like, a plurality of quantitative structure information can be obtained through analysis. In the method, the determination of the atom lattice coordinates and integral intensity is scientific and reasonable; application of the neighbourhood normalized intensity avoids the influence due to the case that the material (especially the polycrystal nanometer material) has larger range of structure fluctuation and defects; and the structure information can be summarized and analyzed quickly, and enormous workloads and errors due to manual measurement are prevented. The method has the advantages of accurate result, wide application range and high operability and the like.
Owner:BEIJING UNIV OF TECH

Synchronous rectification control circuit, power converter and control method thereof

The present invention discloses a synchronous rectification control circuit, a power converter and a control method thereof. The synchronous rectification control circuit comprises a continuous current time detection circuit which is coupled to the power end of a synchronous switch tube and is used for obtaining a continuous current time signal, a rectification time control circuit which is coupled to the continuous current time detection circuit and is used for obtaining continuous current time information according to the continuous current time and thus generating a rectification time control signal, and a logic gate which is used for generating the switch control signal of the synchronous switch tube according to the continuous current time signal and the rectification time control signal, wherein the rectification time control circuit stores the first continuous current time information of a former switch period and compares the first continuous current time information of the former switch period and the second continuous current time information of a current switch period, and thus generates the rectification time control signal so as to avoid the simultaneous conduction of a main switch tube and a simultaneous switch tube. The synchronous rectification control circuit is compatible with a current continuous mode and a current interruption mode.
Owner:HANGZHOU SILAN MICROELECTRONICS

A flexible passive foot system based on bionics

ActiveCN109018061ACompact structureWith toe jointsVehiclesCushioningHigh energy
The invention relates to a flexible passive foot system based on bionics, comprising a flexible toe joint and a lateral cushioning shock absorbing layer, which enables the foot to have the functions of stable support, cushioning shock absorbing and energy storage. The flexibility of the toe joint is provided by a compression spring parallel to the sole of the foot, and the toe portion is connectedto the sole of the foot by a crank linkage mechanism. The shock-absorbing springs are symmetrically distributed in the upper and lower layers of the foot, which is helpful to enhance the stability ofthe robot when walking on uneven ground, and can effectively eliminate the impact of the ground on the foot when walking. The invention realizes the degree of freedom of flexion and extension of thetoe joint and the lateral passive degree of freedom of the foot through the compression and extension functions of the compression spring, and simultaneously utilizes the energy storage characteristics of the spring to enable the foot to have the functions of cushioning, shock absorption and energy saving, so that the walking stability of the robot can be improved and the energy loss can be reduced. Compared with the foot structure of the traditional robot, the invention has the advantages of good imitation of human nature, high walking stability, high energy efficiency, compact structure andgood adaptability.
Owner:WUHAN UNIV

Method for judging stability of time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep)

InactiveCN108242808AFully consider the scaleFully consider the impact of communication time lagPower oscillations reduction/preventionTime delaysElectric power system
The invention discloses a method for judging the stability of a time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep). The method comprises steps of establishing a time-delay power system model; using a linear multi-step method LMS to discretize infinitesimal generators to obtain a discretization matrix of the infinitesimal generators; converting the eigenvalue problem of infinite dimensional into the eigenvalue problem of finite dimensional; calculating the approximate value of the eigenvalue with the largest inverse modulus of the discretization matrix of the infinitesimal generators by the implicit Arnoldi algorithm; performing sparse implementation using the displacement-inverse transformation and Kronecker products in the calculation process; according to the mapping relation, converting the approximate value of the eigenvalue with the largest inverse modulus of the discretization matrix of the infinitesimal generators intothe approximate value of the time-delay power system module; correcting the approximate value by using the Newton iteration method to obtain the accurate eigenvalue of the time-delay power system; anddetermining the stability of the time-delay power system according to the magnitude of the accurate eigenvalue.
Owner:SHANDONG UNIV

Method for measuring powder body material electric conductivity and electric conductivity measuring apparatus suitable for the method

The invention provides a method for measuring the conductivity of the powder material. The method comprises the following steps: (a) keeping the powder material to be measured in a cylinder shape and applying a certain pressure P to the powder material until the shape of the cylinder powder body can be kept stable; (b) measuring the length L, the cross-sectional area S and the resistance R of thecylinder powder body; and (c) calculating the conductivity of powder material based on the formula that Sigma is equal to L divide (R multiply S). The invention further provides a device for measuring the conductivity, which comprises a powder container, two conductive pistons, a pressure device, and a resistance measuring device. By adopting the method and the device, the conductivity of the powder material to be measured in a pressurized state can be measured, thereby the conductivity of the powder material to be measured in an operating pressure can be quantitatively provided. The relationship of the conductivity of the powder material to be measured varying with the pressure P can be obtained through changing the pressure value of the powder material to be measured and measuring the conductivity thereof. The method facilitates the selection of the electrode material, the optimization of the electrode material formulation and the integrated design of the battery system.
Owner:SHENZHEN BAK POWER BATTERY CO LTD

Method for evaluating separation effect of coarse powder separator during mixed coal grinding

The invention relates to a method for evaluating the separation effect of a coarse powder separator during mixed coal milling. The method comprises the steps: evaluating the separation effect of the coarse powder separator during mixed coal milling according to the amount of coarse pulverized coal in fine pulverized coal at an outlet of the coarse powder separator before entering the next processor the amount of fine pulverized coal in the coarse pulverized coal returned to a coal mill, wherein before entering the next process, the smaller the amount of the coarse pulverized coal in the finepulverized coal at the outlet of the coarse pulverized coal separator is, the better the separation effect of the coarse pulverized coal separator is; the smaller the amount of the fine pulverized coal in the coarse pulverized coal returned to the coal mill is, the better the separation effect of the coarse pulverized coal separator is. According to the invention, the test time is shortened, and the field coordination workload of the outlet pulverized coal fineness test of the coarse powder separator is reduced; the test boundary conditions are simplified, the test cost is reduced, the changerule of the performance of the coarse powder separator in the transformation or overhaul period can be known, the design, operation and maintenance and transformation work of the power station boilerpulverizing system can be facilitated, and the energy-saving level of the power station boiler pulverizing system can be improved.
Owner:STATE GRID HEBEI ELECTRIC POWER RES INST +2

Multi-loop and unequal-section cable cluster laying method

The invention provides a multi-loop and unequal-section cable cluster laying method. The method comprises the steps that the cable cluster laying mode, environment parameters and structural parameters and calculation parameters of cables in a cable cluster are obtained; a cable cluster carrying capacity optimized design mathematic model is established according to the cable cluster laying mode, the environment parameters and the structural parameters and the calculation parameters of the cables in the cable cluster; iteration is carried out through a barrier function, the cable cluster carrying capacity optimized design mathematic model is solved, and the cable cluster carrying capacity is obtained; whether laying of the multi-loop and unequal-section cable cluster is reasonable or not is judged according to the carrying capacity of the cable cluster, and if not, the cable cluster carrying capacity and/or arrangement are/is adjusted. Optimization from two aspects including the carrying capacity running optimization and line arrangement optimization can be achieved through the multi-loop and unequal-section cable cluster laying method. The dynamitic running load is more flexible and accurate. Meanwhile, the optimization result can serve as a cable dispatching running reference basis.
Owner:SHENZHEN POWER SUPPLY BUREAU +1

Test fixture for fuel cell membrane electrode

The invention relates to a test fixture for a fuel cell membrane electrode. The test fixture comprises a frame, a single cell assembly, a pressing assembly, a gas conveying assembly and a detection assembly, a containing cavity is formed in the frame, and the bottom of the containing cavity is horizontal. The single battery assembly comprises a first polar plate and a second polar plate, the first polar plate is horizontally arranged at the bottom of the accommodating cavity, the second polar plate is detachably mounted at the upper end of the first polar plate, the pressing assembly comprises a pressing mechanism and a pressure detector, and the pressure detector is used for detecting pressing force; the detection assembly is connected with the single battery assembly, and the gas conveying assembly is connected with the single battery assembly; a temporary single battery is formed between a first polar plate and a second polar plate, and the first polar plate and the second polar plate are pressed by a pressing assembly with a pressure detector, so that the assembling pressure value of the temporary single battery can be monitored and displayed in real time, and the pressed state of a membrane electrode can be quickly known; the influence of the assembly pressure of the temporary single battery on the performance of the membrane electrode can be accurately obtained, so that the test result is more accurate.
Owner:中船重工黄冈水中装备动力有限公司
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