55results about How to "Easy to modify later" patented technology

An underground garbage classified collection system comprises an overground garbage collection device, underground garbage cans and lifting devices, wherein the overground garbage collection device comprises a collecting box, marking buttons which are arranged on the surface of the collecting box and inlet switches which are arranged at the bottom of the collecting box, and the overground garbage collection device is used for collecting overground garbage; the underground garbage cans are used for containing the overground garbage; and the lifting devices are used for raising the underground garbage cans to the ground, so that the garbage in the underground garbage cans can be cleaned away conveniently. According to the underground garbage classified collection system, an underground classified garbage collecting box system is used, and the classified garbage collecting cans are buried under the ground, so that the ground space is saved, and the environment is beautified. According to the underground garbage classified collection system, by the aid of the buttons indicating different kinds of garbage, people are forced objectively to select one button when discarding the garbage, so that a good influence is exerted on reinforcement of the garbage classification idea of the people, and the garbage classification effect can be greatly improved. Besides, according to the underground garbage classified collection system, only simple circuit designs and the lifting devices are used, so that the underground garbage classified collection system is low in cost, high in operability and easy to maintain and transform later.

The invention discloses a centrifugal pump flow induction noise numerical prediction method which is used for computing the sound source feature of flow noise on the basis of the test results of a centrifugal pump performance test. The method can well overcome the shortcomings that in a traditional computing method, the influence from a pump body structure on acoustic propagation is not considered, and eddy broadband noise is ignored. Centrifugal pump inner flow analysis and far-field noise value computing results are used in centrifugal pump low-noise waterpower design, test frequency can be reduced, the development cycle can be shortened, development cost can be saved, the design quality of a centrifugal pump can be effectively improved, an interpolation method is used between a fluid mesh and an acoustics mesh, sound source information of flow field calculation can be reserved to the maximum degree, GREEN analysis is used, the contribution degree on noise from different parts of a shell body can be obtained, such study is carried out, and early design or later modifying of the shell body can be optimized.

Provided is an underseal opening type full-bore cementing sliding sleeve. The underseal opening type full-bore cementing sliding sleeve comprises an upper joint, a lower joint, a central pipe, a rupture cylinder, a sliding sleeve, an inner cylinder, and an outer cylinder, the upper end and the lower end of the central pipe are respectively connected with the upper joint and the outer cylinder, the bottom end of the outer cylinder is connected with the lower joint, the central pipe is connected with the sliding sleeve via a shear pin, the upper end of the inner cylinder is connected with the sliding sleeve, the lower end of the inner cylinder is tangent to the lower joint and can slide along the lower joint, a sidewall of the central pipe is provided with a fracturing hole, the outside of the central pipe is provided with the rupture cylinder capable of sealing the fracturing hole, a containing cavity used for fixing a snap ring is formed between an inner side surface of the outer cylinder and the central pipe, the snap ring is embedded into the containing cavity, the outside of the inner cylinder is provided with a groove matched with the snap ring, and the distance from the groove to the snap ring is greater than the distance from the top end of the sliding sleeve to the lower edge of the fracturing hole. According to the underseal opening type full-bore cementing sliding sleeve, the sliding sleeve can be opened via lower falling of a packer string in a shaft, the sliding sleeve is communicated with an oil gas layer, the operation is convenient and reliable, full bore in the shaft is realized, and convenient conditions are provided for the subsequent construction operation.

The invention provides a pre-fabricated assembled steel structured residential cable and electric wire laying system and a construction method therefor, and specific to the problem of inconvenient post modification caused by the fact that the existing cable through pipe is prefabricated in a wall, and the problem of difficulty in mounting space reduction caused by relatively large laying radius due to through pipe laying. The system comprises a plurality of hydroelectric wall boards and a plurality of cables; vertical branch wire slots used for laying the cables are formed in the hydroelectric wall boards; the cables are fixed in bunches through a plurality of clamps; the clamps are glued in the vertical branch wire slots, so that construction is convenient; the upper ends of the cables walk in a suspended ceiling along a top plate to an indoor power distribution box while the lower ends of the cables are connected with corresponding sockets or switches respectively; the cables are laid in the hydroelectric wall boards, so that post modification or maintenance can be convenient; the cables are fixed in bunches through a plurality of clamps without adopting a pipe through laying way, so that the laying radius can be reduced and the mounting space can be saved; in addition, a power distribution room is connected with each indoor power distribution box in a radiative power supply way, so that direct power supply can be realized after assembling in each layer is completed, and temporary power utilization application can be reduced.

The invention discloses a wheelchair control method based on brain waves and a wheelchair control system combined with voice. According to the wheelchair control method, filtering, feature extractionand signal classification are performed on the acquired brain waves and then the brain waves are converted into wheelchair control signals to control wheelchair movement. The wheelchair control systemcomprises a wheelchair movement motor, a processor module, a voice module, a motor driving module, an obstacle detection module, a road condition detection module and a first communication module group. The wheelchair control system also comprises a brain wave acquisition device and a terminal control device. The brain wave detection device comprises a brain wave acquisition and processing moduleand a second communication module. The terminal control device comprises a mobile phone and a server. The wheelchair user is enabled to control wheelchair movement through the brain waves, the voiceor the manual mode, the wheelchair control consciousness of the wheelchair user can be converted into the voice information and the obstacle and road condition detection and broadcasting can be performed in the wheelchair movement process so that the automation, the intellectualization, the safety and the reliability of wheelchair control can be enhanced.

The invention relates to a trench type prefabricated assembly type cable duct bank and a working well installation construction method. The method comprises the following steps that 1, preliminary installation construction and laying of the trench type prefabricated assembly type cable duct bank are carried out at a corresponding position of the natural ground in advance; 2, after installation construction and laying of the trench type prefabricated assembly type cable duct bank are completed, preliminary installation construction and laying of a working well are carried out at a correspondingposition of the natural ground; and 3, the trench type prefabricated assembly type cable duct bank and the working well which are subjected to preliminary installation construction and laying are combined and installed, constructed and laid as a whole. Compared with the prior art, the method has the advantages of standardized factory production, good quality, high precision, high strength, high bearing capacity, good shock resistance, good impact resistance and the like.

The invention belongs to the technical field of computers, and particularly relates to a software testing method and system. The software testing method comprises the following steps: running software to be tested in a running environment of a cloud platform in response to an operation of a development end user; pushing the software to be tested to a testing end in the form of an interactive video; generating an interactive result corresponding to an operation command of the testing end user specific to the interactive video according to the software to be tested and the operation command in response to the operation command, and pushing the interactive result to the testing end; and transmitting the operation command and the interactive result corresponding to the operation command to a development end. The method can be applied to various software tests, can increase the software testing efficiency, and has a relatively low requirement on the probe technology of a developer.

The invention discloses a system for visually modeling complicated equations on the basis of Modelica. The system comprises a graph view module, a text view module, a block diagram parsing module, a code generating module, a model management module and a data management module. The graph view module is used for receiving graph input of users, the text view module is used for receiving code text input of the users, the block diagram parsing module is used for parsing code block diagrams, the code generating module is used for combining code organization relations obtained by the block diagram parsing module and code fragments acquired by the text view module with one another to obtain complete Modelica equation codes, the model management module is used for inputting the Modelica equation codes into models specified by the users, and the data management module is used for managing all process data and result data in system operation processes and is responsible for the persistence of the data. The system has the advantage that the users can edit the equations in assemblies in dragging connection modes via graphical user interfaces.

The invention discloses a military vehicle display screen multi-angle fixing device and an adjusting method, the device comprises a mounting bracket (1) and a sliding sleeve (2) slidably connected with the mounting bracket (1), and the sliding sleeve (2) is rotatably connected with a rotating bracket (3); a display device (5) is rotationally connected to the rotary bracket (3); a sliding rod (11) on the installation support (1) is in sliding connection with the sliding sleeve (2), one or more sliding rails (111) are arranged on the sliding rod (11), the sliding rails (111) are in contact connection with the sliding sleeve (2), and a locking mechanism (4) and a rotating shaft (54) are arranged on the rotating support (3) and the display device (5) respectively so that the inclination angle of the display screen (51) can be adjusted around the rotating shaft (54). Different view requirements of primary and secondary drivers are met, the occupied area is small, later vehicle refitting is facilitated, and the problem that vehicle-mounted screens cannot be used by primary and secondary drivers at the same time is solved.

The invention relates to the field of workflow system fusion, and particularly discloses a workflow system and business system integrated with specification implementation method, which comprises thefollowing steps of: defining parameters of an operation interface as follows: a node ID, a business instance ID, an operation type, an operation name, an operation address and a callback address; in the development process of the process node, setting operation parameters corresponding to the operation of the process node; when the operation is executed, displaying the operation as a button markedwith an operation name, and when the operation is triggered, calling and exuecting the corresponding operation through the operation data. Through brand-new standard operation inetrgation specifications, a large amount of time and workload required by planning and defining are saved during fusion and targeted development of standard operation of the workflow system. Through a standardized operation definition and compiling mode, the service functions are directly registered, so that the integration efficiency of the workflow and the service functions is greatly improved, and the later modification, management and maintenance of a workflow system are easier and more convenient.

The invention belongs to the technical field of vehicle lamp structures, and relates to a vehicle LED matrix sticker tail lamp. Comprising a tail lamp light-emitting unit structure and a tail lamp vehicle control simulator. The taillight vehicle control simulator is a signal generating device and is responsible for simulating the whole vehicle to send starting, steering, reversing and braking signals; the tail lamp light-emitting unit structure is mainly composed of an LED light source and a flexible base. The LED light source is embedded on the flexible base; a flexible circuit board structure is arranged in the flexible base, and signals sent by the taillight vehicle control simulator control the LED light source to be turned on and turned off through the flexible circuit board structure. The automobile body metal plate structure is greatly simplified, the cost of the whole automobile is reduced, the weight of the automobile is reduced, and automobile lamps with various characteristics and personalities can be conveniently added and changed in the later period; the sticker lamp emits uniform light through the soft light material; the LED lamp is flexible in shape, and light-emitting programming design can be carried out according to needs.

The invention provides a self-adaptive automobile shock absorber realizing stepless adjustment, and belongs to the technical field of automobiles. The self-adaptive automobile shock absorber comprisesa damping cylinder and a damping spring which is arranged outside the damping cylinder in a sleeving mode; the damping spring is a hollow spring internally provided with a damping hole; a plurality of first wires penetrate through the damping hole; the first wires are connected in parallel and then connected with a second wire; the upper end of a liquid storage chamber is slidably connected witha pressure adjusting piston; an armature block located above the pressure adjusting piston is fixedly arranged on an upper mounting base; the second wire is wound on the armature block in the same direction; a first permanent magnet strip of which the magnetic pole direction is in the same straight line as the magnetic pole direction of an electromagnetic structure formed after the second wire onthe armature block is powered on is embedded in the pressure adjusting piston; a permanent magnet group comprises a plurality of second permanent magnet strips which are uniformly distributed in the circumferential direction and outside the axis of a cylinder body; the second wire is connected with a resistor in series; and the second wire is provided with a slide rheostat connected with the resistor and the second wire which is wound on the armature block in parallel. The self-adaptive automobile shock absorber provided by the invention has the advantages of manually intervening the rigidityof the automobile shock absorber and the like.

The invention provides a composite buffer mechanism, and belongs to the technical field of automobiles. The composite buffer mechanism comprises a damping cylinder and a damping spring arranged outside the damping cylinder in a sleeving mode. The damping spring is a hollow spring internally provided with a damping hole. A plurality of first wires penetrate through the damping hole, the first wiresare connected in parallel and then connected with a second wire. The upper end of a liquid storage cavity is slidably connected with a pressure regulating piston. An armature block located above thepressure regulating piston is fixedly arranged on an upper mounting base. The second wire is wound on the armature block in the same direction. A first permanent magnet strip with the magnetic pole direction located on the same straight line as the magnetic pole direction of an electromagnetic structure formed after the second wire on the armature block is powered on is embedded in the pressure regulating piston. A permanent magnet set comprises a plurality of second permanent magnet strips evenly distributed outside the axis of a cylinder body in the circumferential direction. The composite buffer mechanism has the advantage that the rigidity of an automobile shock absorber can be adjusted in a self-adaptive mode.

The invention discloses a valve closing alarm device for a building water appliance, relates to the building water-saving field, and aims to solve the problem that water resource is wasted as a waterappliance is forgotten to close as a result of subjective reasons of a user and the water appliance is damaged when the user goes out. A first electromagnetic water meter is positioned on an inlet tube for acquiring instantaneous flow and instantaneous pressure of water at the inlet tube, and sending the acquired data to a remote data transceiver module; a second electromagnetic water meter is positioned at the tail end of a water feeding vertical tube for acquiring instantaneous flow and instantaneous pressure of water at the tail end of the water feeding vertical tube, and sending the acquired data to the remote data transceiver module; the remote data transceiver module is used for sending received data to a data centralized processing module; and the data centralized processing moduleis used for processing received data according to the transient flow inverse problem theory, and performing valve-closing alarm in a water consumption anomaly condition. The valve closing alarm deviceis suitable for building water saving.

The invention provides a latticed shell structure and wind-resistant truss column connection structure, comprising a horizontal steel beam, a latticed shell lower chord ball joint, a first connection component and a second connection component; the latticed shell lower chord ball joint is mounted on a latticed shell lower chord layer of a latticed shell structure and is connected with the horizontal steel beam through the first connection component, the horizontal steel beam is connected with the wind-resistant truss column through the second connection component, the first connection component comprises a first connector and a second connector connected with each other, the first connector is provided with a vertical elliptical hole, the second connector is provided with a round bolt hole, the second connection component comprises a third connector and a fourth connector connected with each other, the third connector is provided with a horizontal transverse elliptical hole, and the fourth connector is provided with a vertical elliptical hole. The connection structure of the invention has the advantages of simple form, clear force transmission path, good safety and reliability, reduced joint construction difficulty and facilitated late reformation and extension.

The invention provides a vibration reduction device subjected to strong intervention, and belongs to the technical field of automobiles. The vibration reduction device subjected to strong interventioncomprises a damping cylinder and a vibration reduction spring. The vibration reduction spring sleeves the damping cylinder. The vibration reduction spring is a hollow spring, and a damping hole is formed inside the vibration reduction spring. Multiple first wires are arranged in the damping hole in a passing mode, and the first wires are connected in parallel and then connected with a second wire. A pressure adjusting piston is connected with the upper end of a liquid storage cavity in a sliding mode. An armature block which is located above the pressure adjusting piston is fixedly arranged on an upper installation base, and the second wire is wound around the armature block in the same direction. A first permanent magnet strip is embedded into the pressure adjusting piston, and the magnetic pole direction of the first permanent magnet strip and the magnetic pole direction of an electromagnetic structure which is formed after the second wire on the armature block is energized are located on the same straight line. A permanent magnet set comprises multiple second permanent magnet strips which are uniformly distributed outside the axis of a cylinder body in the circumferential direction. The damping hole and the liquid storage cavity communicate with each other through a liquid outlet channel, and the pressure adjusting piston partially covers the liquid outlet channel when thevibration reduction spring is located in the initial state. The vibration reduction device subjected to strong intervention has the advantage that the rigidity of the vibration reduction device can beadjusted in a self-adaptation and high-strength mode.

The invention discloses an upper shell and lower shell assembly machine. The upper shell and lower shell assembly machine comprises a machine base, a turntable device, a plurality of part mounting devices and a part supplying device corresponding thereto, an upper shell supply device, an upper shell assembling device, a screwing device, a first material moving device, a finished product conveyingdevice and a second material moving device, wherein the turntable device comprises a turntable body and a turntable drive mechanism, a plurality of lower shell stations are circumferentially distributed on the turntable body, the turntable body is connected with the turntable drive mechanism, and the turntable drive mechanism is arranged on the machine base and used for driving the turntable bodyto rotate; the upper shell assembling device is used for grabbing upper shells provided by the upper shell supplying device and assembling the upper shells to lower shells which complete the part assembling, the first material moving device is used for moving the lower shells which assembled the upper shells into a positioning table of the screwing device, the second material moving device is arranged on the machine base, and the second material moving device is used for conveying finished products which are screwed from the positioning table to the finished product conveying device. The concentration degree and the automation degree of the upper shell and lower shell assembly of the structure are higher.

A steam turbine is provided that is configured for post-modification for operation in a carbon capture mode. The turbine includes a turbine rotor, a turbine casing and a plurality of turbine stages. In an initial configuration of the turbine, the turbine rotor and turbine casing are each longer, by respective lengths, than is necessary to accommodate the plurality of turbine stages. The lengths are sufficient to accommodate at least one further turbine stage at an exit of the turbine during the post-modification, such that after modification, the turbine operates with an increased expansion ratio and an increased volumetric flow rate at the exit.

The invention provides hydrophobic sponge loaded with carbon nanotubes, a preparation method and application of the hydrophobic sponge, which belong to the technical field of oil-water separation. Firstly, polyurethane sponge isoxidized by using a H2O2 / H2SO4 mixed solution, so that the number of hydroxyl groups of the polyurethane sponge is increased, and the polyurethane sponge is convenient to modify; a silane coupling agent is utilized to realize combination of polyurethane sponge and hydroxylated carbon nanotubes, and specifically, hydroxyl groups of the polyurethane sponge and hydroxyl groups of the hydroxylated carbon nanotubes react with the silane coupling agent to obtain the hydrophobic sponge loaded with the carbon nanotubes. On one hand, the carbon nanotubes can increase the roughness of the surface of the polyurethane sponge and improve the hydrophobicity of the polyurethane sponge, so that the oil-water separation efficiency is improved; meanwhile, the carbon nanotubes can also improve the oil absorption rate of the polyurethane sponge, so that the oil absorption efficiency is improved; in addition, long-chain alkyl of the silane coupling agent is grafted to the polyurethane sponge, the hydrophobicity of the polyurethane sponge can be further improved, and then the oil-water separation efficiency is improved.

The invention discloses a numerical prediction method of the flow-induced noise of a centrifugal pump. The invention provides a numerical prediction method of the flow-induced noise of a centrifugal pump by calculating the sound source characteristics of the flow noise on the basis of the test results of the performance test of the centrifugal pump. Moreover, this method can better overcome the shortcomings of the traditional calculation method that does not consider the influence of the pump body structure on the sound propagation and ignores the broadband noise of the eddy current. Applying the analysis of the internal flow of the centrifugal pump and the calculation results of the far-field noise value to the low-noise hydraulic design of the centrifugal pump can reduce the number of tests, shorten the development cycle, save development costs, and effectively improve the design quality of the centrifugal pump; fluid grid and acoustics The interpolation method between the grids can preserve the sound source information of the flow field calculation to the greatest extent; the GREEN analysis can be used to obtain the contribution of different parts of the shell to the noise. Research on this can be used for the preliminary design or Post-modification for optimization.

The invention provides a residual current mutual inductor which comprises an upper half ring (1) and a lower half ring (2), wherein the left end of the upper half ring (1) and the left end of the lower half ring (2) are hinged through a hinge pin (3); the right end of the upper half ring (1) and the right end of the lower half ring (2) are connected through a hasp (4); and an upper winding group (105) and a lower winding group (106) are mutually connected. The residual current mutual inductor has the advantages of being convenient to install and use, good in product performance and good in measurement balance.

The invention discloses a modeling method for a modular splicing type complex terrain. The modeling method comprises the following steps that S1, firstly, modular modeling single bodies are manufactured for later use; S2, according to the specifications of the modular modeling single bodies, high-precision grid interpolation is carried out on the complex terrain; S3, elevation coordinates of the modular modeling single bodies are locked, and numbering is carried out on each modular single body; S4, sand filling is conducted; S5, plastering is conducted; S6, after the construction of the original terrain is completed, simulating is carried out on the building, and lofting and construction of the building are carried out according to the mark points which are embedded in advance; and S7, after the building is completed, model manufacturing is basically finished. The modularized modeling single body is used so that accurate simulating can be carried out on the complex terrain, the height of the terrain can be accurately simulated through telescopic scales, and therefore the model manufacturing precision can be greatly improved, and the model manufacturing speed can be greatly improved; and a modular splicing mode is adopted, and after numbering is carried out on each module, the modules can be assembled at any place and are not limited by places.

The invention discloses an acylated nanocellulose crystal modified self-cleaning glass. The surface of the self-cleaning glass is coated with a self-cleaning coating; the self-cleaning coating is prepared by taking polyvinyl alcohol as a film forming substance and adding an acylated nanocellulose crystal for modification; the inside of the self-cleaning coating further comprises titanium dioxide nanoparticles; and the surfaces of the titanium dioxide nanoparticles are modified by adopting an acryamide monomer. The invention further discloses a preparation method of the self-cleaning glass. Theself-cleaning glass is good in heat insulation property, poor in hydrophilcity and good in self-cleaning performance, and a functional coating on the surface of the glass is good in bonding with a glass matrix and favorable in durability.

The invention relates to the technical field of indoor decoration, in particular to a magnetic type suspended ceiling. The magnetic type suspended ceiling comprises suspenders, keel assemblies and a panel, wherein one ends of the suspenders are connected with a wall body, the other ends of the suspenders are provided with magnetic attraction devices connected with the keel assemblies, each keel assembly comprises a first keel attracted with the magnetic attraction device and a second keel connected with the first keel and the panel, and the first keels and the second keels are connected in an inserted mode. By designing the magnetic attraction devices and the keel assemblies, screws are not needed in the suspended ceiling mounting process, the tedious dismounting and mounting steps such as nailing are avoided, the dismounting and mounting efficiency is improved, and meanwhile, the situation that the suspended ceiling is damaged and waste is caused when the suspended ceiling is dismounted is avoided.

The invention discloses a thread break preventing device for textile machinery, which structurally comprises an upper thread column, a main frame, a bottom thread column, a thread grinder and a threadoutlet frame, wherein the upper thread column is mounted on and connected with the bottom thread column, the main frame is locked with the thread outlet frame, and the thread grinder is mounted on the main frame; the main frame is composed of a main frame body, frame holes and an outlet plate, the main frame body is welded with the outlet plate, and the frame holes are formed in the main frame body; the thread outlet frame comprises a thread outlet frame body, a thread frame hole and a thread frame port, and the thread frame port and the thread frame hole are formed in the thread outlet framebody; and the upper thread column comprises an upper thread-feeding head, an upper thread-feeding cover and an upper thread-feeding rod, and the upper thread-feeding head and the upper thread-feedingrod are embedded in the upper thread-feeding cover. According to the invention, the conveying stability is improved due to multi-position winding and conveying of spun threads, the spun threads are combed when being conveyed by the upper thread-feeding rod, and an upper trajectory and the thread grinder are capable of adjusting the opening size according to the thread thickness, thereby avoidingthread knots and thread accumulation, and meanwhile, the diameter of a thread knot is reduced by grinding, so that the conveying smoothness of the spun threads is improved.

The invention discloses a detection method for high-precision detection of volatile organic compounds, which comprises the following steps of preparing a cerium-doped mesoporous molecular sieve, sequentially carrying out aminopropyl modification, perylene-3, 4, 9, 10-tetracarboxylic dianhydride grafting and octadecyl mercaptan modification on the cerium-doped mesoporous molecular sieve, and packaging to obtain a volatile organic compound detection film, and establishing a standard curve between the concentration of the volatile organic compounds and the fluorescence intensity of the detectionfilm by utilizing the fluorescence intensity difference of the detection film to the volatile organic compounds with different concentrations, so that the high-precision detection of the volatile organic compounds is realized. In the way, the rich pore structure in the molecular sieve can be used to efficiently adsorb and desorb the volatile organic compound, the perylene-3, 4, 9, 10-tetracarboxylic dianhydride is taken as a substrate, quantitative detection of the volatile organic compounds is realized by utilizing the fluorescence effect of the perylene-3, 4, 9, 10-tetracarboxylic dianhydride, and the sensitivity, accuracy and stability of detection are effectively improved by combining the synergistic effect of all groups, so that the application range is relatively wide.

The invention discloses a production process and equipment of a corner window glass edge covering assembly, relates to the field of automobile corner window glass production processes, and provides the following scheme aiming at the problems that the existing injection molding synthesis equipment used for automobile corner window glass is large in size, complex in structure and high in use and maintenance cost: the corner window glass edge covering assembly comprises triangular glass and edge strips, the mold mechanism is used for synthesizing the triangular glass and the edgings, the mold mechanism comprises a rack, an upper mold and a lower mold, the rack is installed at the top end of the equipment cabinet, and the upper mold and the lower mold are connected into the rack in a sleeved mode; a die cavity is formed in the top end of the lower die, a base plate is connected into the die cavity in a sleeved mode, round holes are evenly formed in the base plate, and an air channel is formed in the lower die. The automobile corner window edge covering production process and the mold equipment are novel in structure, the production efficiency and the product quality are optimized, meanwhile, the equipment structure is simple, operation is convenient and fast, and the production cost is low.

The invention relates to a cubic carbon material from hemicellulose and a preparation method thereof, wherein the preparation method comprises the following steps: 1) cutting shaddock peel into pieces, washing and drying the shaddock peel pieces, and grinding the shaddock peel pieces into powder to obtain shaddock peel powder; 2) adding the shaddock peel powder into an alkaline solution, uniformlystirring and filtering the mixture, and collecting the supernatant; 3) adjusting the supernatant to be neutral, mixing the supernatant with ethanol, performing centrifugal washing, and drying the liquid to obtain a hemicellulose precursor; and 4) mixing the hemicellulose precursor with an activating agent, and calcining the precursor at high temperature to obtain the cubic carbon material. Compared with the prior art, the preparation process is simple, the carbon material is directly synthesized through a one-step method, energy conservation is facilitated, the prepared biomass-based carbon electrode material is of a regular cubic structure, subsequent modification and other operations are facilitated, the raw materials are extracted from biomass waste shaddock peel, the cost is low, andthe application prospect is wide.