970results about How to "Overcome efficiency" patented technology

The invention relates to a port warehousing logistics technology, in particular to a bulk material yard unmanned stacking / reclaiming technology. Firstly, a database is established; secondly, operation instructions, automatic stacking / reclaiming operation modes and control instructions for automatic stacking / reclaiming operations are generated through input operation kinds of goods and the planning work amount; thirdly, the relevant instructions are sent to a central control PLC and then transmitted to the corresponding local stacker / reclaimer PLC through the industrial network; fourthly, the local PLC controls the operation of all components of the stacker / reclaimer to complete the local operation control. At the same time, a material stack laser scanning device is used to scan the material yard condition, and the scanned result will then be transferred to a central control processing unit through the industrial network; fifthly, the central control processing unit achieves the stack type scan data processing of the stacker / reclaimer to generate new instructions which will then be sent to the corresponding local stacker / reclaimer PLC; sixthly, a handle operating panel arranged inside a central control room can be taken as a backup means of manual operation under special circumstances. The invention can be applied to large-scale raw material yards, such as ports, wharfs, open warehouses, mine stacking yards, as well as iron and steel enterprises.

The invention provides a heating atomization electronic cigarette using capacitances to supply power, which comprises a power supply part, a cigarette body part and a hollow cigarette holder part, wherein the power supply part comprises an indicator light, a pair of electrode connection-pegs and a lead connection-peg, the indicator light is arranged at the back end of a power supply, and the electrode connection-pegs and the lead connection-peg are arranged at the front end of the power supply; the cigarette body part comprises a pair of electrode plug interfaces, a lead plug interface, a control circuit module, a heating atomization device, a liquid suction head and a nicotine reservoir, the electrode plug interfaces and the lead plug interface are arranged at the back end of a hollow cigarette stem, and the control circuit module, the heating atomization device, the liquid suction head and the nicotine reservoir are sequentially arranged in the hollow cavity of the hollow cigarette stem; a sponge body is arranged in the nicotine reservoir, and a liquid inlet is arranged on the wall of the nicotine reservoir; the two ends of the liquid suction head are respectively contacted and connected with the heating atomization device and the sponge body, and the power supply part and the cigarette body part can be separated or connected by the electrode connection-pegs, the lead connection-peg, the electrode plug interfaces and the lead plug interface in a plug-in way; and the front end of the cigarette body is in plug-in or threaded connection with the back end of the hollow cigarette holder, and the power supply, the indicator light, the control circuit module and the heating atomization device are sequentially and electrically connected.

The invention relates to an umbrella-shaped electrostatic spinning sprayer and an electrostatic spinning method. The sprayer comprises an umbrella-shaped spinning nozzle, a numerical control type infusion device and a solution collecting groove, wherein the numerical control type infusion device mainly comprises a solution propeller and a controller; the middle of the umbrella-shaped spinning nozzle is provided with a cylindrical hollow portion, and an output end of the solution propeller is placed into the cylindrical hollow portion of the umbrella-shaped spinning nozzle; the controller controls flow velocity and flow of spinning solutions; and the solution collecting groove is placed in the bottom of the umbrella-shaped spinning nozzle. The electrostatic spinning method comprises that a binding post on the umbrella-shaped spinning nozzle is connected with a high-voltage positive electrode, conducting polymer solutions are continuously added to the umbrella-shaped spinning nozzle which is horizontally placed through the numerical control type infusion device, electrostatic spinning is started, collection is achieved through a collecting device, and nano-fibers are formed. The sprayer avoids blocking phenomena, and is easy to clean and good in stability; and the electrostatic spinning method improves production efficiency and the yield of electrostatic spinning.

The invention relates to a full-automatic bulk cargo storage yard stacking and taking method applied to large port wharfs, truck stations and open storages. According to the method, when a stacking and taking machine works, an operating driver for operating and monitoring is not needed in a cab of the stacking and taking machine and a person for control and operation of the whole process is also not needed in a field industrial personal computer on the basis of fully ensuring the utilization rate of a stock yard and exerting the stacking and taking capacity and other functions of the stacking and taking machine. After the field industrial personal computer acquires an operation task from a management system, optimal calculation and security inspection are performed according to the condition of the stock yard and the state of the stacking and taking machine, and related stacking or taking mode information is automatically generated; and then the system automatically sends related control instructions to a programmable logic controller (PLC) corresponding to the local stacking and taking machine, and the stacking and taking machine performs unmanned automatic stacking and taking operation of the whole process. Therefore, the method overcomes the defects of low automation degree of the conventional bulk cargo storage yard, high labor intensity of operators, low working efficiency and low field utilization rate.

The invention discloses a data verification method based on block chains and a data verification system thereof. The data verification method comprises the steps that the sensing data of the environment and / or household equipment state are acquired through multiple wireless sensor nodes of a wireless sensor network and processed and then uploaded to a data repeater; the data repeater receives the processed sensing data and then forwards the sensing data to a data verification network; multiple data verification nodes in the data verification network are responsible for verifying and saving the sensing data; and all the data verification nodes are block chain nodes, and multiple data verification nodes form a distributed database. The data verification task is completed by using the data verification nodes, and the verification work is distributed to the verification nodes from the data repeater so that the problems of being low in verification efficiency, low in speed, high in transmission delay and vulnerable because of the excessively centralized verification task can be overcome, and the nodes are excited to actively authenticate the data and rapidly complete the verification task so that the whole verification system is not influenced by single node failure of any node.

The present application provides a quality inspection treatment method and a system. After the work order sampling process, all traffic orders to be subjected to quality inspection are obtained. After that, the data of a recorded audio file corresponding to each traffic order is subjected to voice analysis. Meanwhile, the comprehensive analysis and the quality inspection for each traffic order and the voice analysis result of the corresponding recorded audio file are conducted, so that a comprehensive quality inspection result is obtained. Finally, according to the comprehensive quality inspection result of each traffic order and the customer service ownership condition of the traffic order, the quality inspection result of each sampled customer service corresponding to the traffic order can be obtained. In this way, the quality inspection process for the customer service is automatically realized. Therefore, the problems that the existing manual quality inspection manner is large in occupancy of human resources, poor in quality inspection efficiency and not objective in quality inspection result in the prior art can be solved.

The invention provides a news event element extracting method. The news event element extracting method comprises the following steps: identifying names contained in a news text and extracting name characteristics; calculating the possibility that the names become protagonists of news events according to the extracted name characteristics; identifying the protagonists of the news events based on the possibility. In some embodiments, the method further comprises the following steps: extracting viewpoints and speaking sentences of the protagonists related to the news events and extracting locations and time of the news events. According to the news event element extracting method, the problems that the cost for manually analyzing and sorting news information is high and the efficiency is low can be overcome; meanwhile, support is provided for superior-layer application of news event searching, news reporting and tracking and the like.

The embodiment of the invention provides a robot charging method and a robot charging device. The method comprises the steps of detecting a path pilot signal emitted by a charging pile and a real-time distance between a robot and the charging pile, if the electric quantity of the charging pile is lower than a preset threshold; and determining a moving direction according to the path pilot signal, and determining a moving speed according to the real-time distance, and controlling the robot to move to the charging pile at the moving speed along the moving direction. The moving speed of the robot is controlled during a process that the robot moves to the charging pile according to the distance between the robot and the charging pile, so that the defect that collision or low time efficiency may be caused by too fast or too slow moving speed can be overcome. Then a charging request including the electric quantity is sent to the charging pile in response to a butt-joint indication signal, so that the situation that the robot triggers a charging requirement is determined if the charging pile receives the charging request within preset time, the charging pile is triggered to charge the robot, and the security problem caused by the condition that the charging pile is mistakenly triggered for charging is solved.

The invention discloses a method for automatically generating testing cases. The method includes the steps of building a testing case management platform to control generation of the testing cases, wherein the testing case management platform comprises a control layer, a service logical layer and a data accessing layer; obtaining an operation instruction input by a user; determining testing parameters and data types according to the operation instruction of the user; building testing data on the testing case management platform according to the testing parameters and the data types; calling case templates preset in a testing case template base through the data accessing layer, and automatically rendering the testing data with a case design method according to the case templates to generate the testing cases. The method for automatically generating the testing cases has the advantages that the automation degree is high, and the testing cases are comprehensive, normative, accurate and reasonable; the generating efficiency and the quality of the testing cases are greatly improved.

The invention discloses a system and method for quickly inspecting a tunnel defect based on machine vision. The system is arranged on an investigation bearing vehicle. The system comprises a machine vision sub-system used for acquiring the to-be-investigated object image data by a CCD (Charge Coupled Device) camera, a laser ranging sub-system used for measuring an imaging distance of an image acquired by the machine vision sub-system by a laser ranging method, a photoelectric speed measuring sub-system used for providing a corresponding coordinate of the acquired image in a tunnel, a control sub-system used for controlling the laser ranging sub-system and the photoelectric speed measuring sub-system, transmitting the data acquired by the laser ranging sub-system and the photoelectric speed measuring sub-system to a data processing sub-system and triggering the machine vision sub-system to acquire an image and transmit the image to the data processing sub-system, a data processing sub-system used for processing the image acquired by the machine vision sub-system according to the data from the control sub-system, and a power supply sub-system used for providing voltage for other sub-systems. According to the invention, the general tunnel defect can be regularly and quickly inspected and the inspecting process is safe, quick, full-automatic and real-time without influencing normal work of the tunnel.

The invention relates to a method and a system for detection of a verticality of CCD installation of a laser cutting machine with an automatically edge searching performance. The method comprises the following steps that: a laser head of a laser cutting machine is directly utilized; a circle and a center of circle mark patterns that are formed by laser light spots are typed on calibration papers,which are paved fixedly at five different areas at a working plane of a cutting bed; marked images at the five different areas are shot through a CCD; an image processing technology is utilized and circumference point coordinates and center point coordinates of the marked images are respectively extracted; and an extreme values of distance of from the center point to all the circumference points are calculated and a verticality between a CCD shaft and the cutting bed is calculated by a calculation model. In addition, the invention also relates to a detection system for a verticality of CCD installation of a laser cutting machine with an automatical edge searching performance. And the detection system mainly comprises three software modules: a control module, an image processing module, and a data processing module. According to the invention, problems on slow detection speed, low efficiency and poor precision and the like during detection on a verticality of CCD installation of a laser cutting machine with an automatically edge searching performance are solved and an automatic capability of the system is also improved.

The invention provides a harbor crane health monitoring and forecasting visualization system including a sensor subsystem, an information collection and transmission subsystem, a central server and a system client; the sensor subsystem is used for acquiring real-time operation parameters of a crane; the information collection and transmission subsystem is used for sending the real-time operation parameters of the crane to the central server through a wireless sending unit; the central server is used for storing and managing the real-time operation parameters of the crane, then performing health diagnosis on the crane to obtain a health condition diagnosis report, also forecasting whether the crane is failed or goes wrong according to the diagnosis result, and evaluating the operation safety of the crane to obtain a safety evaluation report; the system client is used for displaying the real-time operation parameters of the crane, the health condition diagnosis report and the safety evaluation report. The system can comprehensively, efficiently and real-timely monitor the harbor crane health condition, so as to ensure the safety operation of the harbor crane.

The invention provides a logistics cargo volume non-contact measurement method based on a computer binocular stereo vision technology and a point laser range finding technology. According to the method, a point laser range finding supplementary means is introduced; a point laser rangefinder is used to acquire the correspondence among the depth of a measurement point on a cargo object, the distance from an initial point and the point coordinate on an image; the incidence relationship between geometric projections of images shot by left and right cameras is established; the geometric projection correlation area of corresponding feature points in left and right images is positioned and set; image stereo matching of left and right image feature points is carried out in the set geometric projection correlation area of the corresponding feature points; and full width feature point extraction is carried out on the left image, which greatly reduces the range of image matching search and the calculation cost. According to the invention, the problem of the uniqueness of the solution of a spatial point reduction problem is solved; the problems of mis-matching and leakage matching in the image matching process are avoided; and the validity and the accuracy of image stereo matching are greatly improved; and the accuracy and the speed of the measurement of a binocular stereo vision system are improved.

The invention discloses a method for preparing graphene oxide modified composite phase-change microcapsules. The method specifically comprises the following steps: preparing a graphene oxide solid from graphite powder, concentrated sulfuric acid, sodium nitrate, potassium permanganate and deionized water; mixing the obtained graphene oxide solid with absolute ethyl alcohol and a silane coupling agent, and performing a reaction so as to obtain a double-bond modified functional graphene oxide solid; uniformly mixing the obtained functional graphene oxide solid with a phase-change material, a reaction monomer, a cross-linking agent, a reactive emulsifier and deionized water, and performing ultrasonic dispersion so as to form an oil-in-water type pre-emulsion; and putting the obtained oil-in-water type pre-emulsion into a hot water bath, continuously stirring, further adding an initiator solution, and performing a heat-preservation reaction, thereby obtaining the graphene oxide modified composite phase-change microcapsules. By adopting the method disclosed by the invention, composite phase-change microcapsules which are high in encapsulation efficiency, stable in property, good in heat conductivity, appropriate in phase-change temperature and relatively high in phase-change latent heat enthalpy can be prepared.

The invention discloses a high specific capacity spindle-shaped ferroferric oxide / carbon nano composite material for a negative electrode of a lithium ion battery. A raw material, namely soluble ferric salt is solved in a mixed solvent of glycerol and distilled water; after low-temperature treatment, precipitates are collected, and a spindle-shaped iron oxide hydroxide (FeOOH) precursor is obtained; and after the precursor is subject to carbothermal reduction, the ferroferric oxide / carbon nano composite material with the same appearance is obtained. The invention discloses a preparation method of the spindle-shaped ferroferric oxide / carbon, which has the advantages that the operation is simple, convenient and simple to do, the used raw material has a cheap price, mass production is facilitated, and the synthetized spindle-shaped ferroferric oxide / carbon nano composite material shows high first time coulomb efficiency and high specific capacity when being used as the negative electrode of the lithium ion battery, and is a promising negative electrode material of the lithium ion battery.

The invention relates to a lithium-sulfur rechargeable battery, in particular to a lithium-sulfur rechargeable battery with a graphene or graphene oxide interlayer, and belongs to the technical field of electrochemistry. An ion selective function is realized by the graphene or graphene oxide interlayer, and the defect of the original lithium-sulfur battery that the diffusion of polysulfide between an anode and a cathode causes low charging and discharging efficiency and poor battery performance stability is overcome. The selective transmission of lithium ions can be realized, and a novel solution is expected to be provided for effectively inhibiting lithium-sulfur battery technical obstacles, such as polysulfide migration. The use of the lithium-sulfur rechargeable battery in combination with a high-capacity anode material contributes to boosting of the sulfur functionalization of the lithium-sulfur rechargeable battery.

The invention provides a high-compaction density silicon-carbon negative electrode material and a preparation method and an application thereof. The silicon-carbon negative electrode material is formed by mixing silicon powder, graphite and an additive at a certain ratio; and the final product is obtained by burning, coating and re-burning the silicon-carbon negative electrode material, wherein the silicon-carbon composite material is of a porous spherical structure; silicon is evenly dispersed into porous silicon carbon balls in a form of nanometer silicon; the particle sizes of the silicon are smaller than 200nm; and a uniform coating layer is formed on the surface of the silicon. The high-compaction density silicon-carbon negative electrode material is high in efficiency, high in capacity and good in cycling stability when applied to a lithium-ion battery, low in cost and suitable for large-scale production and the preparation method is simple.

The invention discloses an axial magnetic field modulated brushless double rotor motor, belonging to the motor field and solving the problems that the operating efficiency is lowered and the reliability is reduced because the winding rotation in a double rotor motor introduces the current through an electric brush and a slip ring, and the components, such as electric brushes and the like need to be maintained. The two stators of the invention are fixed the left end and the right end of a shell; a modulated ring rotor is positioned between the two stators and outside a permanent magnet rotor; a prime motor drives the permanent magnet rotor to rotate to form a 2n pole magnetic field; the stator is electrified to form a 2p pole magnetic field; the 2n pole magnetic field and the 2p pole magnetic field are modulated by the modulated ring rotor; q magnetic-conducting pieces and q insulated pieces are arranged on the end surface at the two sides of a stator frame of the modulated ring rotor along the peripheral direction in an interlacing manner; the relational expression that p is equal to the absolute value of the sum of hn and kq is satisfied, which is given to the load by the output shaft of the modulated ring rotor in different rotating speed; and the axial magnetic field modulated brushless double rotor motor of the motor of the invention has two structures, one structure is in axial symmetrical type, and the other structure is in axial unilateral type. The motor of the invention is used for the occasions of electric automobiles, wind power generation and torpedo drive.

The invention discloses a fishing ship of garbage on water. The fishing ship comprises a ship body, a garbage pickup device and a garbage conveying device, wherein the ship body is provided with a garbage storage cabin; the garbage pickup device is connected with the ship body and is used for fishing the garbage on water; the garbage conveying device is used for conveying the fished garbage to the garbage storage bin; the garbage pickup device comprises a rotary cylinder capable of rotating with respect to the axis and a trap which is connected to the rotary cylinder and extends outward; the rotary cylinder extends to water surface from the ship body and is provided with a garbage passing hole; the rotary cylinder rotates so as to drive the trap to rotate and enable the garbage on water lifted by the trap to enter the garbage conveying device from the garbage passing hole. According to the fishing ship of garbage on water, the garbage falls off from the garbage passing hole depending on the self-gravity to the garbage conveying device, and is brought into the garbage storage bin by the garbage conveying device; the fishing ship can fish the garbage conveniently and rapidly; the water surface environment can be improved conveniently; the defects of low efficiency, high risk and high labor intensity in fishing of the garbage on water surface can be overcome, so that the labor force is liberated, the labor intensity is lowered and the labor efficiency is improved.

The invention relates to a micro-CT technology-based reservoir core three-dimensional entity model reconstruction method. The method includes the following steps that: a micro-CT technology is utilized to scan a reservoir core, so that a sectional scanning image of the reservoir core can be obtained, so that a CT image of a real reservoir core can be obtained, and a watershed algorithm is adopted to perform image segmentation on the CT image, so that the three-dimensional data of the image can be obtained; a Marching Cubes algorithm is adopted to generate a three-dimensional surface model of the reservoir core; and with the three-dimensional surface model of the reservoir core adopted as constraints, a constrained Delaunay tetrahedralization algorithm is utilized to generate the three-dimensional entity model of the reservoir core. According to the method of the invention, the three-dimensional entity model of the real reservoir core is established based on the sectional scanning image of the reservoir core, so that the obtained three-dimensional entity model of the reservoir core is more approximate to the structure of a real reservoir core. The method of the invention has the advantages of high accuracy and high efficiency. With the method adopted, defects of poor accuracy and low efficiency in the reconstruction of the three-dimensional entity model of a reservoir core in the prior art can be eliminated, and an effective guarantee can be provided for reservoir core simulation characteristic research.

The invention discloses a physical method based on environment mapping for simulating human skin subsurface scattering. The method comprises steps that, a legendre formula is utilized to project and disintegrate an illumination integration equation in a to-be-simulated scene to acquire a luminance value of each pixel; the luminance value of each pixel is multiplied with an overflow color value to acquire a scattering value of each pixel at a back light face. The physical method based on environment mapping for simulating human skin subsurface scattering solves problems of large data processing workload, large occupation storage space and low processing efficiency existing in the prior art and has advantages of small data processing workload, small occupation storage space and high processing efficiency.

The invention discloses a method and a device for detecting cloth flaws based on adaptive orthogonal wavelet transform. Manual eye detection and an original automatic flaw detecting method in which wavelet transform is carried out after a wavelet basis is manually selected are replaced. The defects of traditional manual eye detection, such as low detection speed, low efficiency, false detection and high detection leaking rate are overcome. The problem of the original flaw detecting method based on wavelet transform that the detection precision is low as the wavelet basis is not optimized is solved. The optimal wavelet basis matched with a cloth texture is selected by an improved quantum rotating gate quantum genetic algorithm, the quantum rotating angle is regulated by a dynamic strategy, fine adaptive search is realized, the variety is enriched through introducing mutation operation, and the optimization capability of the algorithnm is improved through combining chaotic search. The flaw detecting method has the advantages of high speed, high accuracy, simplicity in operation and high efficiency and has great application prospects.

The invention discloses a nano composite expansion flame retardant polyurethane foamed plastic and a preparation method thereof. The nano composite expansion flame retardant polyurethane foamed plastic is characterized in that the preparation method comprises the following steps: evenly mixing 40 to 80 percent of polyol, 0.1 to 3 percent of foaming agent, 0.1 to 2 percent of foam stabilizer, 0.1 to 2 percent of catalyst, 0.5 to 4 percent of expandable graphite, 0.5 to 9 percent of halogen free phosphate ester or phosphonate ester and 0.5 to 5.5 percent of organic modified nano inorganic filler by weight percentage; and then mixing the mixture evenly with two or more isocyanate polyisocyanate compounds in the weight ratio of 1:2-2:1, and injecting the mixture into a die at 5 to 40 DEG C for foaming. The obtained nano composite expansion flame retardant polyurethane foamed plastic product effectively reduces the heat release rate and the total heat release amount of the material, improves the oxygen index and the vertical firing flame retardant property of the material, reduces the effect of an expansion type flame retardant on reducing the mechanical properties of the material, and meets the requirements of fire safety and project application.

The invention belongs to the technical field of synthesis and preparation of polymer materials, and discloses a synthetic method of triblock polymer, wherein stepwise polymerization (SGB), atom transfer radical polymerization (ATRP) and click chemistry method are combined at first; and 1, 3-dipolar cycloaddition reaction is performed to polymer with azido terminal group and polyurethane prepolymer with alkynyl terminal group to successfully synthesize triblock polymer containing triazole ring. The synthesis method provided by the invention overcomes the defects in traditional block polymer synthesis that reaction conditions are strict, molecular weight distribution is controlled difficultly, and selectable classes of monomers are less, and has the advantages of high conversion rate, mild reaction conditions, narrow molecular weight distribution and strong controllability. The triblock polymer provided by the invention has potential application in ways of medicine slow release, solubilizers and surfactants.

The invention relates to a dual-crank arm type piezoelectric-electromagnetic composite power generation device. The composite power generation device comprises a dual-crank arm type piezoelectric-electromagnetic composite transducer; the dual-crank arm type piezoelectric-electromagnetic composite transducer comprises a dual-crank arm type piezoelectric-electromagnetic composite power generation oscillator, an upper permanent magnet layer, an upper induction coil layer, a lower permanent magnet layer, a lower induction coil layer and a piezoelectric-electromagnetic composite transducer box; the upper permanent magnet layer is arranged in the middle of the upper induction coil layer; the lower permanent magnet layer is arranged in the middle of the lower induction coil layer; and the dual-crank arm type piezoelectric-electromagnetic composite power generation oscillator is arranged between the upper and lower permanent magnets, and the induction coils. A dual-crank arm type piezoelectric oscillator, a permanent magnet mass block and a rigidity-variable spring of the dual-crank arm type piezoelectric-electromagnetic composite power generation oscillator form an overall structure to generate a certain synergistic effect, so that the composite power generation device is relatively low in resonant frequency and relatively high in amplitude, and generated electric quantity is obviously increased; and therefore, the composite power generation device is widely applicable to the recycling fields of random, wideband, low-frequency, high-amplitude, and high-strength vibration energy in the environments.

The invention discloses an energy-saving air-conditioning / hot water triple-supply system, comprising a compressor (1), a hot water heat exchanger (4), an air heat exchanger (6), an air conditioning heat exchanger (10) and other parts; using main components of a heat pump system, the system adopts a structure with three heat exchangers interconnected in a mixed manner and double four-way reversing valves and has four working modes including refrigeration and water heating, water heating, heating and water heating, and defrosting, thus the triple supply of refrigeration, heating and clean hot water can be realized; the system has high heat exchange efficiency and simultaneously enhances energy efficiency ratio of system as well; by adopting the heat pipe exchangers, the system solves the problem that the heat exchanger is liable to leakage so as to pollute water, and overcomes the deficiency of large resistance when a plurality of heat exchangers are connected with each other in series.

The invention discloses a device used for restoring the sludge polluted by heavy metals and a use method thereof. The device is an electrolytic cell (11), wherein the inside of the electrolytic cell (11) is provided with three baffles (5); the electrolytic cell is divided into an anolyte tank (3), a sludge treatment chamber (9), a heavy metal setting tank (4) and a catholyte tank (10) in sequence by the baffles (5); two graphite electrodes connected with a power supply (1) are separately inserted in the anolyte tank (3) and the catholyte tank (10); the inside of the side next to the sludge treatment chamber (9), of the heavy metal setting tank (4) is provided with a cation exchange membrane (6); and the side opposite to the cation exchange membrane (6) is provided with an anion exchange membrane (7). By adopting the device and method of the invention for restoring sludge, the efficiency is high, the operation is simple, the cost is low and most of heavy metals in sludge can be removed.

The invention provides a door-access control method and device. The door-access control method comprises the following steps of: acquiring the signal intensity of an RFID (Radio Frequency Identification Device) label positioned in a vehicle by a door-access RFID reader; determining a first position of the RFID label according to the signal intensity; determining the current position of the vehicle according to the first position; acquiring the driving direction of the vehicle; and determining the opening time of a gateway corresponding to the driving direction according to the current position. The door-access control method and device provided by the invention have the advantages that the defects of long passing time and low efficiency in the existing door-access system are overcome, and the investment of the system is greatly reduced compared with the traditional long-distance reading mode.

The invention belongs to the field of large-scale heavy load part processing and relates to equipment and a method for milling the inner surface of a bent pipe. The equipment comprises an equipment machine body, a vertical column, a supporting rod, a clamping device, a revolution milling device, a workbench and a guide rail. The machining of the inner surface of the arc line section of the bent pipe is realized in a mode of guide rail leading matched with gear transmission by matching the circular motion along the guide rail and the revolution motion around a slide block, and through the screw feed cutting motion along the bus of the bent pipe under the drive of a servo motor. The equipment can perform transmission stably and reliably; the mechanism has a simple design; the control mode is simple and direct; the cutting state is stable; the cutting impact load is small; and the surface quality, the efficiency and accuracy are high. The equipment and the method are suitable for processing the inner surfaces of the arc line sections of various large-and-medium-sized bent pipe parts.

The invention discloses a quasi-resonance converter synchronous rectification circuit which comprises a power transformer, a secondary power switch circuit, a rectification tube control circuit and a follow current tube control circuit. Detection to the power transformer is used for achieving a no-voltage connecting function and a no-voltage disconnecting function on a rectification tube in the secondary power switch circuit. The quasi-resonance converter synchronous rectification circuit aims at solving the problem that a traditional quasi-resonance converter using diode rectification is large in connecting loss and low in efficiency when used in a large current output applying occasion. The quasi-resonance converter synchronous rectification circuit can achieve no-voltage connecting and no-voltage disconnecting of the rectification tube and a follow current tube under the conditions of load changes, input voltage changes, temperature changes and the like, has the self-adaptation soft switching function, is high in conversion efficiency, contributes to high frequency and miniaturization of a converter, and can be widely applied to manufacturing power sources for the industry, the aviation and the communication.