1174results about How to "Good orientation" patented technology

The invention relates to a concrete surface crack detection method and system based on a machine learning algorithm, and the method comprises the steps: obtaining concrete wave velocity, frequency, amplitude, strength, elastic modulus, temperature and linear expansion coefficient, analyzing characteristic parameters, building a mathematical relation model, fitting data through a machine learning algorithm, determining model parameters, and calculating the concrete surface crack detection result. Relevant parameters of to-be-detected concrete are input into the multi-parameter digital quantity plate model, the model calculates potential risks and predicted values of cracks, the multi-parameter digital quantity plate model is applied to real-time detection of the concrete structure to achieve quality evaluation and crack prediction, the concrete structure is monitored regularly, and model data are updated; the system comprises a data acquisition module, a data preprocessing module, a feature extraction module, a crack measurement module, a multi-parameter digital quantity board model establishment module, a multi-parameter comprehensive analysis module, a real-time monitoring and early warning module, a database management module and a user interface and interaction module.

The invention provides an abnormal sound test bed for a steering pull rod. The abnormal sound test bed comprises a base, a positioning table and an excitation mechanism, the positioning table and the shock excitation mechanism are fixedly connected with the upper side of the base, and the shock excitation mechanism is arranged on the x-direction side edge of the base; the vibration excitation mechanism comprises a fixing frame, a vibration frame, a driving assembly and a plurality of elastic connecting pieces, the driving assembly comprises a transmission end capable of vibrating in the x direction, the transmission end is fixedly connected with the vibration frame, and each elastic connecting piece comprises an elastic piece, a first connecting part and a second connecting part. The first connecting part and the second connecting part are connected with the fixing frame and the vibrating frame respectively and enable the elastic piece to be arranged perpendicular to the x direction, the vibrating frame is provided with an installation base face arranged perpendicular to the x direction, and a butt joint is fixedly connected to the installation base face. According to the invention, the elastic connecting piece is arranged to limit the vibration frame, so that the vibration frame can only vibrate in the x direction, and the accuracy of abnormal sound test is ensured.

The invention belongs to the technical field of polymer heat conduction, and particularly relates to a preparation method of a high-heat-conductivity polymer with modified boron nitride as filler, which comprises the following steps: (1) dissolving boron nitride nanosheets into tetrahydrofuran, ultrasonically dispersing uniformly, adding a modifier for reaction, then removing tetrahydrofuran by using a rotary evaporator, transferring into deionized water, and drying to obtain a boron nitride nano-sheet; drying to obtain a modified boron nitride nanosheet; (2) dispersing carbon nanotubes in deionized water, stirring and carrying out ultrasonic treatment, adding the modified boron nitride nanosheets, and then carrying out freeze orientation treatment and freeze drying treatment to obtain a porous foamed composite heat-conducting filler; and (3) carrying out melt blending on the composite heat-conducting filler and polyethylene glycol terephthalate, and carrying out hot press molding to finally prepare the modified high-heat-conductivity polymer. According to the invention, the composite heat-conducting filler improves the interfacial compatibility and dispersity with a polymer matrix, and reduces the interfacial thermal resistance of the composite material, so that the modified polymer has good application in the aspect of heat dissipation of electronic equipment.

The invention discloses a preparation method of super-drafted carbon fibers, carbon fibers and application, and relates to the technical field of inorganic materials. The method comprises the following steps: preparing a spinning solution containing 10-40wt% of polyacrylonitrile; 2, 4, 6-triaminopyrimidine and barbituric acid are added into the spinning solution, the total amount of 2, 4, 6-triaminopyrimidine and barbituric acid accounts for 1-20 wt% of polyacrylonitrile, and a spinning solution is obtained; carrying out dry spray preforming on the spinning stock solution, then putting the spinning stock solution into a coagulating bath solution at 0-10 DEG C, and carrying out low-temperature coagulating bath treatment at a draw ratio of 1-10 to prepare nascent fibers; and preparing the nascent fiber into a precursor, and preparing the precursor into the carbon fiber through pre-oxidation and carbonization processes. By adding the supramolecular gel accelerator, the spinning stock solution can be rapidly gelated in a coagulating bath, and then high-multiple drafting can be applied to nascent fibers. The internal graphite structure of the carbon fiber prepared by the super-drafting gel spinning technology is perfect, the orientation is good, the defects are reduced, and the fiber strength is improved.

The invention belongs to the technical field of assembly equipment, and discloses a shaft system assembly mechanism capable of automatically meshing shaft teeth, which comprises a workbench, an intermediate shaft body, a differential mechanism body and an input shaft body, a clamping assembly is arranged on the workbench, the clamping assembly comprises a mounting base fixed to the lower end face of the workbench, and an electric clamping jaw rotationally connected is arranged at the upper end of the mounting base and used for clamping and fixing the lower end of an intermediate shaft body vertically placed on the workbench; a rotary driving assembly is arranged on the workbench and used for driving the intermediate shaft body to rotate. A pair of horizontally-arranged sliding table assemblies are arranged on the upper end face of the workbench and located on the two sides of the central axis of the intermediate shaft body correspondingly. The purpose of conveniently completing meshing assembly of the differential mechanism body, the input shaft body and the intermediate shaft body is achieved, excessive collision in the meshing assembly process can be avoided, and damage to shaft teeth on the differential mechanism body, the input shaft body and the intermediate shaft body is reduced.

The invention discloses a forming method of an ultra-high molecular weight polyethylene strip, which comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene resin and a low molecular weight solvent to prepare a uniform suspension, then extruding at high temperature, and cooling and shaping to obtain a gel film; step 2, carrying out single-axis high-temperature ultra-time hot stretching on the gel film; 3, extracting the stretched gel film to remove the low-molecular-weight solvent, and drying with hot air to obtain a dried film; 4, longitudinally cutting the dry film to form strips; and step 5, carrying out low-multiple uniaxial thermal stretching on the strip to remove pores so as to obtain the final ultra-high molecular weight polyethylene strip. The gel film is subjected to uniaxial hot stretching under the condition that a low-molecular-weight solvent is not removed, and the low-molecular-weight solvent is beneficial to promoting orientation of fibrous extended-chain crystals reserved in the gel film and formation of high-orientation crystals such as subsequent extended-chain crystals, so that the tensile mechanical property and other properties of a final strip are improved.

The invention discloses a floating photovoltaic electrical connection wiring method and system, and relates to the technical field of photovoltaic power generation system design, and the method comprises the steps: analyzing the power generation influence factors of a floating photovoltaic power station, and predicting the power generation amounts of different time periods or different regions according to the power generation influence factors; according to the floating photovoltaic power station and the generating capacity of the different areas, path planning is carried out, and constraint conditions are set; and determining a trunk line and a connection point according to the path planning result and the generating capacity, and completing electrical connection wiring. The improved A * algorithm is used for path planning, a multi-objective optimization method is adopted, multiple objectives such as the path length, the electric energy loss and the construction difficulty are balanced, constraint conditions such as the maximum bearing current and the voltage drop range of the cable are considered, and system operation safety is ensured. The achievement of the invention is supported by national key research and development plan projects, and the project name is offshore floating photovoltaic power generation key technology and core component research and development and engineering demonstration (project number: 2022YFB4200700).

The invention belongs to the technical field of video image processing, and particularly relates to a mote recognition and early warning method and a piston type camera cleaning device.The mote recognition and early warning method comprises the following steps that firstly, images are preprocessed, and preprocessing comprises graying processing, contrast enhancement processing and Gaussian blur processing; step 2, feature extraction including edge detection, brightness detection and fuzzy measurement; according to the dust identification early warning method and the piston type camera cleaning device, a dust coverage index DCI is generated through feature extraction and regional analysis, and whether the camera cleaning device needs to be started or not is judged according to the index. And detecting the dust coverage degree on the surface of the camera lens, and automatically generating a dust coverage degree index DCI. And judging whether a cleaning threshold value is reached according to the DCI so as to trigger an automatic cleaning function. An efficient and accurate dust identification algorithm is provided, and the method is suitable for a long-time operation environment of an industrial or outdoor camera.

The invention discloses a preparation method of a continuous graphene nanofiber bundle, and relates to the technical field of graphene fiber materials. The preparation method comprises the following steps: preparing and preparing a graphene oxide nanobelt solution, and adding a plasticizer to obtain a spinning solution; injecting the spinning solution into an electrostatic spinning device, performing near-field electrostatic spinning and air curing, and performing curing forming in a coagulating bath to obtain basic graphene oxide fibers; a plurality of fibers are assembled into nanofiber multifilaments in a coagulating bath, and then the nanofiber multifilaments enter a subsequent multi-stage combined drafting process to prepare a GO fiber aggregate; the GO fiber aggregate is immersed in a Lys-Dopa solution for a reaction, and finally the GO fiber aggregate is collected through a twisting process; reducing the collected GO fibers with hydroiodic acid to obtain reduced graphene fibers, and then performing high-temperature graphitization treatment to obtain a graphene nanofiber bundle product; the graphene fiber preparation process is improved from multiple aspects of raw material preparation, spinning and drafting, Lys-Dopa bath, twisting and the like, a new mechanical property improvement scheme is provided, and development of the graphene fiber field in the future is promoted.

The utility model provides an injector assembling device. The injector assembling device comprises a base and a supporting frame fixedly installed on the top of the base. The connecting plate is rotationally mounted on the supporting frame; the motor is fixedly installed at the top of the supporting frame, and an output shaft of the motor is fixedly connected with an output rod of the connecting plate; the plurality of placing grooves are formed in the connecting plate, and needle cylinders are placed on the plurality of placing grooves; and the driving air cylinder is fixedly installed on the supporting frame, a thumb air cylinder is assembled on the driving air cylinder, and a piston rod is arranged on the thumb air cylinder. The injector assembling device has the advantages that the piston rod can be conveniently guided, stable sliding of the piston rod is guaranteed, and assembling operation is facilitated.

The invention relates to an offshore pile foundation construction platform, in particular to an offshore pile foundation operation assembly platform and method. Comprising a pile top supporting structure, a working platform and an inter-pile connecting structure, and the pile top supporting structure is detachably fixed to the top of a pipe pile; a hole allowing a pipe pile to penetrate through is formed in the middle of the operation platform, and the operation platform is vertically and adjustably connected to the pile top supporting structure through a connecting structure. The inter-pile connecting structure is a telescopic structure which is folded and placed in the working platform before working construction and extends outwards to form a channel for connecting the working platform on the two adjacent pipe piles during working construction. The assembling platform is simple in structure and convenient to use, not only can a platform structure be formed on the pipe pile, but also the adjacent working platforms can be connected, the whole assembling platform is very easy to assemble and disassemble, and construction is easy.

The invention belongs to the technical field of fiber size measurement, and particularly relates to a method for measuring the length of fibers in a fiber reinforced thermoplastic composite material. Mixing and diluting the fiber reinforced thermoplastic composite material and thermoplastic resin to obtain a diluted material, pressing the diluted material to obtain a test sample strip, cutting the test sample strip into a sample wafer, and measuring the length of the fiber in the sample wafer under an optical microscope; wherein the fiber reinforced thermoplastic composite material is prepared from matrix resin and reinforced fibers, and the matrix resin is the same as thermoplastic resin. According to the invention, the problems of poor measurement result accuracy and reproducibility and low measurement efficiency of the existing fiber length measurement method for the fiber reinforced thermoplastic composite material are solved.

The invention relates to the technical field of monitoring equipment, and particularly discloses anti-interference monitoring equipment for electric power information communication, which comprises a fixed plate, protective shells are rotatably mounted at two ends of the side surface of the fixed plate, and the opposite surfaces of the two protective shells abut against each other. Mounting holes are formed in the corners of the sides, away from the opposite faces, of the ends, close to the fixing plate, of the two protective shells, connecting holes are formed in the inner walls of the mounting holes in the length direction, the mounting holes communicate with the interiors of the protective shells through the connecting holes, and mounting shafts are rotationally mounted on the inner walls of the ends, away from the fixing plate, of the mounting holes; shielding cloth is wound on the outer wall of the mounting shaft, one end of the shielding cloth penetrates through the connecting hole and is provided with a connecting plate, the connecting plate abuts against the inner wall of the protective shell, and a limiting groove is formed in the side face of the connecting plate in the length direction. The limiting plate drives the plurality of shielding cloths to perform protection and magnetic field shielding on the circuit board.

The utility model discloses a harvester which comprises a lifting soil-removing assembly, an aligning cutting assembly, a retractable adjusting assembly and a fruit leaf collecting assembly, the lifting soil-removing assembly is fixedly connected with the aligning cutting assembly, the position and the angle of the lifting soil-removing assembly are adjusted through the retractable adjusting assembly, and the fruit leaf collecting assembly is arranged on one side of the aligning cutting assembly. The lifting and soil removing assembly lifts the carrots to a certain height and removes soil from the carrots in the lifting process, the aligning and cutting assembly aligns the carrots subjected to soil removal and cuts fruit leaves of the carrots in a horizontal transportation mode, and the fruit leaf collecting assembly collects and transports the cut fruits and leaves. According to the carrot harvesting machine, the functional modules are diversified, all the assemblies are matched with one another, the carrots are subjected to leaf stroking, lifting, soil removing, aligning and cutting, fruits and leaves obtained after cutting of the carrots are collected respectively, and efficient carrot harvesting work is achieved.

The invention provides a preparation method of a polyolefin hollow fiber membrane, which comprises the following steps: S1, spinning: melting and extruding a polyolefin material to obtain a semi-molded product; s2, cooling crystallization: carrying out cooling crystallization on the semi-formed product to obtain nascent fibers; s3, primary shaping: carrying out heat setting treatment to obtain a heat-set semi-finished product; s4, cold drawing and hole forming are conducted, specifically, cold drawing treatment is conducted to obtain a cold-drawn semi-finished product; the cold drawing elongation rate is 20-40%, and the cold drawing rate is (10-30)% / min; s5, hot drawing and chambering are conducted, the hot drawing elongation rate is 2-6 times of the cold drawing elongation rate, and the hot drawing rate is not higher than 15% of the cold drawing rate; and S6, secondary setting: carrying out secondary heat setting treatment to obtain the hollow fiber membrane. According to the present invention, the rapid-drawing and less-drawing cold drawing process is adopted to cooperate with the slow-drawing and more-drawing hot drawing process, such that the porosity of the inner layer can be substantially improved on the basis of ensuring the compact degree of the skin layer, and the high dimensional stability of the prepared membrane filament can be ensured by the drawing process so as to achieve the service life and the degassing effect accidentally at the same time.

The invention provides a solar radiation quantity evaluation method and device, electronic equipment and a storage medium, historical meteorological data of a place where a photovoltaic project is located are acquired and data cleaning is performed on the historical meteorological data, and the historical meteorological data are from various meteorological databases; performing data fusion processing on the cleaned historical meteorological data based on geographic position information of the photovoltaic project to obtain target meteorological data of a place where the photovoltaic project is located; and performing data analysis on the target meteorological data, and determining radiation quantity data of the place where the photovoltaic project is located. Compared with the prior art, the method has the advantages that the historical meteorological data is acquired from various meteorological databases, so that information from different sources can be covered to the greatest extent, and possible deviation or missing of a single data source is reduced; based on the accurate target meteorological data, the radiation quantity data of the place where the photovoltaic project is located can be calculated more accurately, and the power generation efficiency and economic benefits of a photovoltaic system are improved.

The invention provides a multipurpose and multifunctional composite brush disc, and belongs to the technical field of ocean ship industry. The multifunctional composite brush disc is installed on a certain carrier through a flange installation piece so as to brush a target object, and the multifunctional composite brush disc specifically comprises a motor assembly, a brush assembly and a blade assembly. The motor assembly passes through an output shaft, the brushing assembly is fixedly connected to the output shaft, and the output shaft drives the brushing assembly to rotate; the blade assemblies can be arranged in different numbers according to requirements and are evenly welded to the upper portion of the cleaning and brushing assembly. After the control module controls the driving motor to start, the high-pressure water valve is opened, the brush disc rotates to drive the brush wires and the blade assembly to rotate, and high-pressure water flow can effectively wash and strip substances such as seaweed and silt attached to the surface of a ship body; the blade assembly can effectively cut off shellfish organisms attached to the surface of the ship body; shallow substances such as dirt on the surface of the ship body are brushed through the bristles. Three brushing schemes of high-pressure water, blade cutting and bristle brushing are integrated, and different substances attached to the surface of the ship body can be effectively brushed.

The invention relates to the technical field of non-standard automation, in particular to full-automatic lock catch feeding, injection molding and transferring equipment which comprises a feeding mechanism, a plate placing mechanism, a material taking mechanism, an injection molding mechanism and a discharging and transferring mechanism. The feeding mechanism comprises a fixed shaft feeding assembly and a shaft sleeve feeding assembly, the fixed shaft feeding assembly is used for locking fixed shaft feeding, and the shaft sleeve feeding assembly is used for locking shaft sleeve feeding; the wobble plate mechanism comprises a wobble plate mechanical arm, a wobble plate driving assembly and a wobble plate material frame, the wobble plate mechanical arm is used for grabbing the locking fixed shaft and the locking shaft sleeve on the fixed shaft feeding assembly and the shaft sleeve feeding assembly respectively and placing the locking fixed shaft and the locking shaft sleeve on the wobble plate material frame for positioning and placing, and the wobble plate driving assembly is used for driving the wobble plate material frame to rotate. The placed locking fixing shaft and the locking shaft sleeve face the injection molding mechanism; full-automatic lock catch feeding, injection molding, taking and transferring are achieved, manpower and material resources are saved, and the production efficiency is improved.

A continuous acceleration type nail gun comprises a guide rail and a nail box. The left arc end of the guide rail is connected with the first electrode plate, the right arc end of the guide rail is connected with the second electrode plate, the inlet end of the guide rail is connected with the nail box, and the guide rail further comprises an outlet end. Then the steel nail moves to the left arc end, repulsive force is generated by the first electrode plate to accelerate the steel nail, then the steel nail moves to the right arc end, repulsive force is generated by the second electrode plate to accelerate the steel nail, and the process is repeated until the steel nail is ejected from the outlet end; the first electrode plates or the second electrode plates alternately generate electric field force to accelerate the steel nails, and therefore the continuous acceleration effect is achieved. The number of the left arc ends and the number of the right arc ends can be set according to needs, so that different ejection speeds can be obtained, and the adaptability is wide. Therefore, according to the design, the steel nail can be continuously accelerated, and the adaptability is wide.

The invention relates to a perovskite solar cell and a preparation method thereof, and belongs to the technical field of solar cells. The perovskite solar cell comprises a conductive substrate, a hole transport layer, a passivation layer, a perovskite layer, an electron transport layer and a metal electrode which are arranged in sequence, the material of the passivation layer is selected from one or more of mercaptoethylamine, ethylenediamine and propylamine; and the thickness of the passivation layer is 1 nm to 10 nm. Through the introduction of interface passivator molecules, the interface between the hole transport layer and the perovskite layer is improved. The surface wettability of the PTAA thin film is enhanced, so that the perovskite precursor solution can form a uniform and compact perovskite layer on the PTAA / SCAs thin film, the carrier separation and transmission efficiency at an interface is improved, and the stability of a device is enhanced.

The invention relates to the technical field of polyimide films, in particular to a high-transmittance colorless polyimide film and a preparation method thereof. The polyimide film is prepared from a mixture comprising dianhydride and diamine, and the molar ratio of dianhydride to diamine monomer is (0.9-1.1): 1. The polyimide film prepared by the invention has excellent light transmittance, tensile property and thermal stability, also has good processability, and can be widely applied to the field of flexible photoelectricity, especially flexible display.

The invention belongs to the field of wind energy and ocean energy utilization, and discloses an anti-typhoon novel wind-wave combined power generation structure system which comprises a semi-submersible base used for being suspended on the sea surface. The semi-submersible base comprises three buoys which are annularly and uniformly distributed, the upper ends of every two adjacent buoys are fixedly connected through a first connecting assembly which is horizontally arranged, the lower ends of every two adjacent buoys are fixedly connected through a second connecting assembly which is horizontally arranged, and third connecting assemblies which are horizontally arranged are fixed to the middle sections of the peripheral walls of the buoys; each first connecting assembly is provided with two oscillating floater type wave energy power generation devices. According to the semi-submersible type base, the utilization rate of wind energy resources and wave resources is increased, and meanwhile the stability of the semi-submersible type base can be improved by arranging the three buoys on the sea surface in an equilateral triangle shape; when the wind speed of the typhoon exceeds the specified wind speed, the distance between any two adjacent buoys can be synchronously increased, so that the bottom area of the semi-submersible base is increased, and the stability of the semi-submersible base under the condition of high wind speed is further improved.

The utility model provides a clamping tool for a connecting buckle, and belongs to the technical field of rim machining auxiliary equipment. The clamping tool comprises a mounting seat, a positioning block and a movable guide rod are arranged on the mounting seat, the positioning block is used for placing a connecting buckle, a pressing piece is arranged at the outer end of the guide rod, the clamping tool further comprises a driving piece used for driving the guide rod to move towards the positioning block, a guide block is arranged on the mounting seat, and the guide rod is connected to the guide block in a sliding mode. According to the clamping tool, the operation convenience can be well improved, the guide block plays a good role in guiding the guide rod, the stability in the moving process is improved, and the pressing piece can more accurately clamp the connecting buckle.

The utility model discloses a relay, which comprises a fixed part and a movable contact part, and is characterized in that the fixed part comprises an accommodating piece and a static contact piece group which are fixedly connected with each other; the movable contact part is suitable for moving relative to the fixed part in the X-axis direction and comprises a movable contact piece set, and the movable contact piece set and the static contact piece set are connected or disconnected in the X-axis direction. One of the accommodating piece and the movable contact part is provided with a chute, and the other one is provided with a guide part; the sliding groove extends in the X-axis direction, and the guide part extends into the sliding groove in the Z-axis direction so as to be in sliding fit with the sliding groove in the X-axis direction. By the adoption of the technical scheme, compared with the prior art, a better guiding effect is achieved.

The invention discloses a plugging method, device and system for an air leakage channel in a mine. The method comprises the following steps: acquiring a vertical section image of a rock stratum in a mine; based on the vertical profile images, height information of caving zones corresponding to the different types of rock stratums is determined; based on the height information and distance information between a working face of the mine and a roadway in the mine, angle information of a foam injection hole in the mine is determined, and the working face is an area where a mining operation task is being executed in the mine; a target air leakage area of the goaf in the mine is determined, and according to the angle information, the foam injection pipe extends into the target air leakage area through the foam injection hole so as to block an air leakage channel between the goaf and the external environment of the mine and an air leakage channel between the goaf and the working face, the goaf is an area where a mining operation task is executed in the mine. The technical problem that an air leakage channel in a mine cannot be effectively blocked is solved.

The invention discloses a solution jet spinning nanofiber yarn forming device, and relates to the technical field of yarn, the solution jet spinning nanofiber yarn forming device comprises a nanofiber generating mechanism, a fiber bundle compounding mechanism and a yarn collecting mechanism which are arranged in sequence, the nanofiber generating mechanism can utilize airflow to stretch spinning solution trickles to obtain nanofiber bundles, and the nanofiber bundles are arranged on the spinning solution trickles. The fiber bundle compounding mechanism is arranged at the outlet end of the nanofiber generating mechanism, the fiber bundle compounding mechanism receives nanofiber bundles generated by the nanofiber generating mechanism and forms nanofiber yarns, and the yarn collecting mechanism is used for winding and collecting the nanofiber yarns. The invention further discloses a method for preparing the nanofiber yarn through the device. The nanofiber yarn prepared through the device and the method has the advantages of being small in size, large in specific surface area, high in porosity, good in orientation degree, large in tensile strength, fluffy in structure, capable of achieving large-scale production and the like.

The invention relates to the technical field of controllable preparation of carbon nanotube fiber tows, in particular to a method for continuously preparing high-conductivity carbon nanotube fiber tows by uniformly propelling a high-quality liquid crystal solution through air pressure. A high-quality carbon nanotube liquid crystal spinning solution serves as a raw material and is placed in a charging kettle, the liquid crystal spinning solution is pressed into an acetone coagulating bath through a porous spinneret plate by means of uniform air pressure generated by an air compressor, and then high-conductivity carbon nanotube fiber tows are continuously prepared through a winding device. According to the method, the technical bottleneck of continuous spinning of the high-performance carbon nanotube fiber tows at present is broken through, and continuous preparation of the high-orientation-degree and high-conductivity carbon nanotube fiber tows is achieved.

The invention discloses a building component intelligent robot automatic mold grabbing device which comprises a building component robot, the building component robot comprises hardware equipment and a software system, and the hardware equipment comprises an adjusting assembly, a lifting assembly, a grabbing assembly and a man-machine interaction assembly; the software system comprises a processing template, an execution template, a voice control template and a gesture recognition template. According to the invention, operation instructions are issued through the operation buttons and the instruction input area on the control panel, instructions can also be issued to the building component robot through the voice control template and the gesture recognition template, and efficient and convenient man-machine interaction is realized.

The utility model relates to the technical field of projection equipment, in particular to a projector, which comprises a shell, and a projection assembly, an air uniformizing structure and a cooling fan which are arranged on the shell, a containing cavity is formed in the shell, an air duct inlet communicated with the containing cavity is formed in the shell, and the projection assembly is arranged in the containing cavity; the air inlet end of the air uniformizing structure is connected with an air outlet of the cooling fan, and the air outlet end of the air uniformizing structure is connected with the air channel inlet. According to the projector provided by the embodiment of the invention, the air uniformizing structure is arranged between the cooling fan and the air duct inlet, so that airflow blown by the cooling fan passes through the air uniformizing structure and then enters the accommodating cavity of the shell to dissipate heat of the internal projection assembly, thereby enabling the airflow entering the accommodating cavity to be distributed more uniformly; the problem of poor local heat dissipation effect caused by non-uniform distribution of heat dissipation airflow in the existing projector can be effectively solved.

The invention relates to the field of portable heat dissipation, in particular to a neck-hanging fan which comprises a first air duct provided with a first air outlet, a fan and a second air duct containing the fan, and the second air duct and the first air duct are connected to form a ventilation channel with the air flow direction; a fan is arranged in the first air duct, the rotating center axis of the fan and the center axis of the first air duct in the air flow direction are arranged in an inclined mode, the fan comprises a high-speed three-phase motor, the working voltage of the high-speed three-phase motor is 3-6 V, the working current of the high-speed three-phase motor is 0.25-8 A, and the rated power of the high-speed three-phase motor is 1-10 W. The neck-hanging fan has the high-speed and uniform air outlet effect, and the problem that when an existing neck-hanging fan is used outdoors, the user experience feeling is poor is solved.