67results about How to "Control time" patented technology

The invention relates to the technical field of vacuum heat treatment of cold work die steel, in particular to an annealing cooperative control method and system for vacuum heat treatment of the cold work die steel, and the method comprises the steps: determining a vacuum degree change factor based on the change condition of vacuum degree measured values at all collection moments from a vacuumizing ending moment to each collection moment, determining a heat transfer influence factor by combining the difference between the vacuum degree measurement values between the adjacent acquisition moments and the difference between the temperature measurement value and the temperature of the surface of the workpiece; determining a tissue transformation influence factor based on the difference of the vacuum degree measured values and the difference of the heat transfer influence factors between the adjacent acquisition moments; and annealing of vacuum heat treatment of the cold work die steel is controlled based on the heat transfer influence factor and the structure transformation influence factor. The annealing temperature and the heat preservation time of vacuum heat treatment of the cold work die steel are controlled, and the performance of the cold work die steel is improved.

The invention discloses a micro-expansive internal curing agent for steel pipe self-compacting concrete and a preparation method thereof.The micro-expansive internal curing agent comprises fluidized bed combustion ash and an adhesive component, the fluidized bed combustion ash is soaked in an adhesive solution, and the adhesive component is coated on the surface and in pores of the fluidized bed combustion ash; the mass fraction of viscose components in the viscose solution is 0.1%-1%, and the viscose components comprise 0-80 parts of alginate, 5-30 parts of polyacrylamide and 0-20 parts of carboxymethyl cellulose ether. According to the internal curing agent, the fluidized bed combustion ash is adopted as an internal curing agent matrix, the fluidized bed combustion ash is composed of calcium sulfate and the like, the early shrinkage performance of concrete can be reduced through expansion of the fluidized bed combustion ash, meanwhile, the surface porosity characteristic of the fluidized bed combustion ash is utilized, and viscose formed after alginate, polyacrylamide and carboxymethyl cellulose ether are dissolved in water is combined; pores of the fluidized bed combustion ash are filled with components such as alginate and the like, and the components are crosslinked with calcium ions on the surface of the fluidized bed combustion ash to form water-retaining gel microspheres with core-shell structures, so that the water absorption and water retention properties of the internal curing agent are improved.

The invention discloses a porous carbon material based on microwave calcination and a preparation method thereof, and belongs to the field of porous carbon preparation, the preparation method comprises the steps that a carbon base material and potassium hydroxide are mixed according to the mass ratio of 1: 1-5, a mixed material is obtained, and the carbon base material comprises biomass carbon, resin carbon and fossil carbon; the mixing comprises the following steps: putting the carbon base material and potassium hydroxide into a mixer, and stirring at the rotating speed of 200-600rpm for 3-20 minutes; pressing the mixed material into a block body, and putting the block body into a microwave calcining furnace for calcining treatment; and the calcined block is subjected to acid pickling and drying treatment. The cost and the performance can be adjusted as required by using diversified raw material sources, and the trend of green chemistry and sustainable development is met.

This invention belongs to the field of polymer material preparation technology, specifically relating to a method for preparing polysulfone resins via segmented polymerization. This invention provides a novel segmented polymerization method for polysulfone resins, dividing the polymerization reaction into two parts: a prepolymerization reaction and a post-desalting polymerization reaction. The prepolymerization reaction employs either an excess of phenolic monomers or an excess of halogenated monomers. After the initial salt-forming reaction of the phenolic and halogenated monomers, desalting is performed. At this point, the viscosity is low, making it easier to separate the salts from the prepolymer. This solves the problem in one-step synthesis methods of polysulfone resins where the resin viscosity increases after the formation of the polymer, making it difficult to effectively remove salts and small polymer molecules trapped within the polymer. This improves the quality of the polysulfone resin. Simultaneously, after salt removal, the polymerization system approaches homogeneity, significantly increasing the reaction rate and enabling controlled polymerization of ultra-high molecular weight polymers without cross-linking or explosive polymerization.

The utility model discloses a field modularized movable instant biological fermentation device, which belongs to the technical field of agricultural microorganism and biological stimulant fermentation production equipment, a tank body is arranged on a walking mechanism, one end of a feeding pipe A and one end of a feeding pipe B are both communicated with the top of the tank body, one end of a discharging pipe is communicated with the bottom of the tank body, and the other end of the discharging pipe is communicated with the bottom of the tank body. The tank body is sleeved with the honeycomb type Miller plate jacket, the electric control box is installed on the walking mechanism, the stirring mechanism is installed on the tank body, the water circulation mechanism is installed on the walking mechanism and communicated with the honeycomb type Miller plate jacket, and the overhauling mechanism is installed on the walking mechanism on one side of the tank body. And the stirring mechanism and the water circulation mechanism are electrically connected with the electric control box. The device disclosed by the utility model has the advantages that bacterial liquid can be generated by field fermentation to activate soil, disease prevention and nutrition supplementation can be performed in a targeted manner, the use of pesticides can be reduced, and the cost is low.

The invention provides an elastic centralizer which comprises a first connecting cylinder, a second connecting cylinder and a plurality of centralizing ribs, the top ends of the centralizing ribs are connected with the first connecting cylinder, the bottom ends of the centralizing ribs are connected with the second connecting cylinder, the first connecting cylinder and the second connecting cylinder are arranged on the outer wall of a sleeve in a sleeving mode, and the centralizing ribs are made of fiber resin composite materials. And the sleeve extends in an arc form in the direction far away from the sleeve. According to the elastic centralizer, the contact area of the centralizing ribs and the well wall is in a proper range, large supporting force can be provided, stress is not concentrated, meanwhile, the centralizing ribs have good elastic reset capacity, when the centralizing ribs are subjected to local pressure, the centralizing ribs are not prone to plastic deformation, and therefore centering running of a casing cannot be affected.

This invention relates to a method for manufacturing a composite rotationally symmetric component (10) of varying thickness for a gas turbine, comprising: producing a fiber fabric (140) in the form of a mesh by three-dimensional or multi-layer weaving; winding the fiber fabric (140) in multiple overlapping layers (141, 142, 143, 144) onto a mandrel (200) with a profile corresponding to the casing to be manufactured, to obtain a fiber preform with a shape corresponding to the casing to be manufactured; and densifying the fiber preform by a matrix. During the winding of the fiber fabric (140) onto the mandrel, a fabric web (150) is placed between at least one or more adjacent turns of the fiber fabric, the fabric web (150) having a structure different from the three-dimensional weaving and in the axial direction (D... A The width of the ) is smaller than the width of the fiber fabric (140).

The invention provides mixing equipment for disinfectant production, and relates to the technical field of disinfectant preparation, the mixing equipment comprises a reaction tank and a partition plate; a partition plate is arranged in the reaction tank, a material leakage opening is formed in the partition plate, a threaded rod is rotatably connected to the interior of the reaction tank, a sealing sleeve is connected to the threaded rod through threads, a connecting baffle is slidably connected to the interior of the sealing sleeve, a connecting sleeve is rotatably connected to the connecting baffle, and a material receiving opening corresponding to the material leakage opening is formed in the connecting baffle; the connecting sleeve is fixedly connected with a partition check block capable of partitioning the material receiving port, a connecting rod is fixedly connected in the reaction tank, the connecting rod is in sliding connection with the connecting sleeve, the sealing sleeve and the connecting baffle, a first discharging hole is formed in the sealing sleeve, and a second discharging hole is formed in the connecting sleeve. According to the application, the loss of silver ions in the filtering process of the silver phosphate precipitate can be reduced.

The invention provides a device and a method for grinding a silicon wafer. The method comprises the following steps: acquiring an initial thickness value of each area on the surface of the silicon wafer before grinding the silicon wafer; when the surface of the silicon wafer is ground, the grinding thickness value of each area is obtained in real time; calculating the grinding amount of each area according to the grinding thickness value and the initial thickness value; grinding time is obtained, and the grinding rate of each area is calculated according to the grinding amount and the grinding time; and according to the demand feedback of the grinding rate of each area corresponding to the grinding liquid amount of the area, the movement time proportion and the movement speed of the nozzle relative to each grinding interval of the grinding disc are controlled, so that the thickness of each area on the surface of the ground silicon wafer meets the requirement. The method is used for adjusting the distribution state of the grinding fluid on the grinding disc in real time so as to improve the grinding rate of the thin film on the surface of the silicon wafer.

The invention relates to the technical field of target shooting systems, in particular to a remote control night target shooting system which comprises a control module, a gathering area setting module, a preparation area setting module, a target shooting area setting module and site monitoring lighting equipment. The control module controls the gathering area setting module, the preparation area setting module, the target shooting area setting module and the site monitoring lighting device through the WIFI module, and the gathering area setting module forms a gathering area in a designated area through a gathering area marking instrument. The preparation area setting module forms a preparation area in a designated area through a preparation area marking instrument and projection lamp equipment, the remote control night target shooting system can remotely control the target display lamp through the control module, can accurately control the lighting time and the darkening time of the target display lamp, is convenient and rapid, and is high in practicability. Shooting training of soldiers is facilitated.

The utility model discloses a full-automatic control charcoal barbecue oven which comprises an oven body, a plurality of hooks rotationally connected with the oven body are installed at the top in the oven body, a driving device for driving the hooks to rotate is arranged at the top in the oven body, and a control panel is arranged at the top of the front side of the oven body. A control circuit board electrically connected with the driving device is arranged on the rear side of the control panel, a speed regulator electrically connected with the control circuit board is installed on the control panel, and a lighting device electrically connected with the control circuit board is installed in the furnace body. The control panel is provided with an illumination control switch electrically connected with the control circuit board, and a temperature sensing rod electrically connected with the control circuit board is arranged in the furnace body. According to the utility model, the control functions are complete, the air door can automatically slide and be accurately adjusted, the heating temperature of food can be optimal, the barbecue time, temperature and rotating speed can be accurately controlled, the barbecued food is good in taste, and the consumer experience is good.

The invention relates to the technical field of welding, in particular to a gold removing and tin coating device for an electric connector lead, which comprises a liquid outlet, a heating container, a solder wire, a wire feeding wheel and a driver, and is characterized in that the front end of the heating container is conical and is connected with the liquid outlet in a matched manner; the rear end of the heating container is cylindrical and is used for a solder wire to enter; the wire feeding wheels are arranged on the two sides of the solder wire and clamp the solder wire. And the driver is electrically connected with the wire feeding wheel and is used for driving the wire feeding wheel to rotate, so that the solder wire continuously enters the heating container. The high-frequency heating principle is adopted, heating and melting of the solder wire are efficiently and rapidly achieved, the piston push rod formed by the solder wire is used for achieving extrusion of molten solder, the molten liquid solder is kept to flow in the soldering groove, and it is guaranteed that the outer surface of the soldering groove is not polluted by the solder.

The invention discloses a preparation process of a PUR hot melt adhesive for sofa assembly, and belongs to the technical field of hot melt adhesive production.The preparation process of the PUR hot melt adhesive for sofa assembly comprises the specific implementation steps that firstly, metering, storage and pretreatment of raw materials are completed; 2, mixing, reacting and filtering the raw materials, and controlling operation conditions; 3, cooling forming of the mixture is completed, and a crude product is formed; and step 4, completing screening and slitting of the crude product to form a final product, and re-metering and storing the final product. The production temperature change and time are effectively controlled, and the finally produced PUR hot melt adhesive is ensured to have higher melting point and better viscosity, so that the PUR hot melt adhesive better meets the assembly and use requirements of sofas.

The invention relates to a crystallinity characterization method and a preparation method of a boron nitride interface layer of a ceramic-based composite material, belongs to the technical field of ceramic-based composite materials, and solves the problems of inaccurate and complicated characterization of the structure of the boron nitride interface layer in the ceramic-based composite material, no unified standard and high cost in the prior art. The method comprises the following steps: measuring spin-lattice relaxation characteristic time T1 of an isotope B-11 in the boron nitride interface layer by adopting a solid nuclear magnetic resonance method, and characterizing the crystallinity of the boron nitride interface layer by adopting T1. The method can accurately reflect the local atomic-scale structure and movement of the boron atomic nucleus of the boron nitride interface layer, and the microstructure of the boron nitride interface layer affects the combination between the tow fiber and the matrix and determines the toughening effect of the tow fiber. According to the method, quantitative characterization of the interface layer structure in the ceramic-based composite material is realized, optimization of a boron nitride interface layer deposition process is effectively guided, and improvement of the performance of the composite material is facilitated.

The invention relates to a special-shaped cavity inner wall evaporation magnetron sputtering target material system, and relates to the field of target materials. The device comprises an aluminum alloy bracket, a sputtering system vacuum cavity arranged on the aluminum alloy bracket, a displacement transmission device arranged above the sputtering system vacuum cavity, and a special-shaped cavity magnetron sputtering ellipsoidal target system arranged in the sputtering system vacuum cavity and connected with the displacement transmission device, the external vacuum pump set and the vacuum measuring equipment are arranged at the bottom of a vacuum cavity of the sputtering system, an ellipsoidal single-cell superconducting radio frequency cavity is formed in the vacuum cavity of the sputtering system, and the irregular cavity magnetron sputtering ellipsoidal target system comprises an ellipsoidal niobium target material arranged in the single-cell superconducting radio frequency cavity. And a copper rod is connected between the displacement transmission device and the single-cell superconducting radio frequency cavity. According to the invention, uniform coating can be realized by moving the target material in the radio frequency acceleration cavity and controlling the power of the target material and the sputtering time at the same time; the target material is small in size and can be uniformly placed in an external magnetic field coil.

The invention relates to the technical field of vacuum deoxygenization, in particular to a multichannel solution deoxygenization device for a laboratory and a deoxygenization method of the multichannel solution deoxygenization device. A pressure reducing valve, a gas source switch, a vacuum pump switch, a drying pipe, a vacuum pump and a gas cylinder are sequentially arranged on the first pipeline, one end of the first pipeline is communicated with the vacuum pump, and the other end of the first pipeline is communicated with the gas cylinder filled with nitrogen or inert gas; the first vacuum pressure gauge, the guide pipes and the second vacuum pressure gauge are sequentially arranged on the second pipeline, the eight guide pipes are installed on the second pipeline through the pipe joints respectively, the fixing platform is connected with the second pipeline through the fixing platform support, a solution sample to be deoxidized is contained in the anaerobic bottle, and the anaerobic bottle is placed on the fixing platform. And each conduit is connected with an anaerobic bottle through a needle head to remove oxygen in the solution. The method solves the problem of long time consumption of deoxidizing by an inert gas replacement method, improves the deoxidizing efficiency of the solution, saves 90% of gas source consumption, and is suitable for rapidly deoxidizing the solution in a laboratory.

The invention provides a foaming device and method for bubble mixed light soil production, and relates to the technical field of foaming devices.The foaming device for bubble mixed light soil production comprises a supporting table, and a machining pipeline is fixedly installed in the supporting table; a discharging assembly used for receiving and discharging materials is fixedly installed at the upper end of the processing pipeline, and a set of mixing assemblies used for improving contact between the materials and gas are arranged in the processing pipeline. A discharge threaded blade is arranged on a rod body of a driving rotating rod and located in a discharge barrel, so that materials entering the discharge barrel can be discharged upwards in sequence through the discharge threaded blade, falling of the materials is achieved, the time of the materials in a receiving barrel can be controlled while it can be guaranteed that the materials can fall through the structure, and the discharging efficiency of the materials is improved. And foaming and discharging of the materials can be achieved in time according to the proportion requirement, so that the efficiency in the foaming process is improved.

The invention relates to the technical field of cement-based building materials, in particular to anti-disturbance ultra-high-performance concrete for wet joint cast-in-place and a preparation method of the anti-disturbance ultra-high-performance concrete for wet joint cast-in-place. Composite cement and a composite admixture are matched with high-quality fine aggregate, internal curing aggregate is prepared to achieve humidity regulation and control, and a composite expanding agent is matched to inhibit concrete shrinkage, so that the anti-disturbance ultra-high-performance concrete is obtained. The special water reducing agent is used for adjusting the construction performance of the concrete, and is matched with the early-strength setting-adjusting admixture, so that high early strength, low shrinkage and constant setting time of the ultra-high performance concrete are realized, and the influence of external disturbance on road and bridge construction is reduced.

The invention relates to the technical field of integrated circuit security and power glitch fault injection, and discloses a high-time-precision power glitch fault injection method and device for a cryptographic chip. The method comprises setting parameters of a power glitch fault injection device, initializing and configuring a cryptographic chip to be tested through a computer, and determining a power glitch fault injection time according to a power glitch voltage and a target instruction; setting the power glitch fault injection time through a computer, controlling a high-voltage pulse generator to generate a power glitch fault, and injecting the power glitch fault into the cryptographic chip to be tested, and judging and recording valid error ciphertexts; obtaining valid error ciphertexts generated by the cryptographic chip to be tested when different plaintexts are input through multiple power glitch fault injections; analyzing the valid error ciphertext according to differential faults, and cracking key information of the cryptographic chip to be tested, so that the injection time point can be more accurately controlled when the power glitch fault is injected into the cryptographic chip.

The invention relates to the technical field of proton exchange membrane electrolyzed water, in particular to a preparation method and application of a composite proton exchange membrane. The migration of noble metal ions in the membrane is realized by utilizing pH gradient and ion gradient, the noble metal ions are doped into one side of an anode of the membrane, uniform distribution of noble metal particles in the membrane is realized by utilizing a longitudinal dipping mode, and then the time of reduction through in-situ sodium borohydride is controlled, and the doping amount of a hydrogen elimination catalyst is controlled, so that the hydrogen elimination efficiency is improved. And preparing the ultralow noble metal loading capacity composite membrane. The composite proton exchange membrane is prepared through precious metal impregnation reduction, the performance is guaranteed, meanwhile, the hydrogen permeation amount of a membrane electrode is reduced, the hydrogen content in anode side oxygen is reduced, the product purity is improved, and meanwhile, the safety is improved. The uniform distribution of the noble metal fully improves the utilization rate of the catalyst, so that the catalyst coating film can obtain an excellent hydrogen elimination effect when a small amount of noble metal is impregnated.

The utility model relates to a conveying type pressure maintaining device for mobile phone assembly belongs to mobile phone assembly equipment field, including pressure maintaining fixture still includes the conveying system for conveying pressure maintaining fixture, the conveying system includes conveying mechanism and the receiving mechanism who arranges in proper order from left to right, the conveying mechanism has the pressure maintaining conveying surface for conveying pressure maintaining fixture with the conveying speed of pressure maintaining conveying surface adjustable, and the conveying direction is from left to right, the pressure maintaining conveying surface is divided into the left and right arrangement's placement area and pressure maintaining work area, the receiving mechanism with the end of pressure maintaining work area links, to receive the pressure maintaining fixture that pressure maintaining work area conveyed, the utility model can eliminate the static waiting time of pressure maintaining process to the production efficiency of mobile phone assembly is improved significantly.

The utility model discloses a cocktail preparation machine, and relates to the technical field of cocktail preparation. A liquid storage bottle is arranged on the liquid taking device; the upper end of the base is provided with a supporting rod, and the upper end of the supporting rod is provided with a liquid taking device. A guide groove is formed in the base; the driving rod is slidably arranged in the guide groove; the first driver is arranged at the lower end of the base; the first driving piece is connected to the lower end of the driving rod; the modulation cup placing rack is connected to the upper end of the driving rod. And the preparation cup placing rack can be stably shaken in the preparation process, so that the risk of non-uniform mixing or toppling in the preparation cup caused by rapid or strenuous movement is reduced. The shaking strength, frequency and time can be effectively controlled, and the consistency and stability of the cocktail quality are remarkably improved. Meanwhile, the workload of a bartender is relieved, the fatigue degree is reduced, and the cocktail blending efficiency is greatly improved. The purposes of improving the stability of the modulation cup in the modulation process and further reducing the risk that ingredients are splashed out due to the fact that the modulation cup inclines and turns over are achieved.

The application discloses a portable millimeter wave active denial defense riot shield, which comprises a shell and further comprises a supporting assembly for providing support for the shield and an adjusting assembly for adjusting the height of the shield; the supporting assembly comprises a shield, supporting rods, a sliding cylinder and a screw rod A; the shield is hinged to the shell through a hinge base at the bottom end of the shield; two supporting rods are respectively hinged to the shield at two sides of the shield; the other ends of the two supporting rods are respectively hinged to the sliding cylinder through hinge bases on the other ends; the sliding cylinder is slidingly connected to the shell; the screw rod A is threadedly connected to the axis of the sliding cylinder; the screw rod A is rotationally connected to the shell in the shell; and the shield is connected to the adjusting assembly; and the shield can be effectively prevented from being knocked down by impact.

The utility model provides a calcium carbonate precipitation device, which relates to the technical field of calcium carbonate, and comprises a shell, the shell consists of a stirring cavity, a water filtering cavity and a blanking cavity, the inner surface of the stirring cavity is provided with filtering holes, and the bottom of the stirring cavity is provided with a material accumulation port. According to the calcium carbonate stirring device, the first driving motor is started, so that the first rotating shaft drives the first stirring plate to rotate, then materials are poured into the stirring cavity, the rotating first stirring plate stirs the poured materials, calcium carbonate is scattered and stirred uniformly, and solid calcium carbonate is slowly settled after being filtered by the filtering holes; then, a second driving motor is started, so that a supporting plate drives a piston block to move downwards, the filtered calcium carbonate is discharged to a discharging cavity, unified collection and operation are facilitated, the calcium carbonate settling time can be well controlled, and the calcium carbonate settling efficiency is improved. And blockage of calcium carbonate is avoided.

The invention discloses a seed crystal discharge monitoring method suitable for a chemical crystallization reactor, which comprises the following steps: calculating the time and duration of seed crystal discharge by monitoring the water inlet and production pressure, the treatment flow, the seed crystal standing height or fluidization height and the accumulated operation time of a granulation crystallization reactor. According to the method, the time and time of seed crystal discharge are calculated by monitoring the water production inlet pressure, the treatment flow, the seed crystal standing height or fluidization height and the accumulated operation time of the granulation and crystallization reactor, so that reference is provided for seed crystal discharge and feeding control of the granulation and crystallization reactor; therefore, the technical problems of serious loss of seed crystals during discharging during the growth period caused by difficult control of seed crystal discharging and supplementary feeding parameters of the granulation and crystallization reactor, unstable fluidized state of the reactor caused by excessive or insufficient seed crystals and the like are solved. The method is suitable for a granulation and crystallization removal technology of pollutants containing hardness, heavy metals, phosphorus and the like, and the operation stability of a granulation and crystallization reactor can be improved.

The invention relates to the field of comprehensive recycling of resources, in particular to a method for removing oxalate and removing vanadium in a sodium aluminate solution. The method comprises the following steps: evaporating, concentrating and crystallizing a high-concentration first sodium aluminate solution to obtain a seed crystal, adding the seed crystal into a low-concentration second sodium aluminate solution, inducing oxalate to separate out crystals at a relatively high temperature, filtering to remove oxalate, and further cooling and crystallizing filtrate to recover high-grade vanadium salt. According to the method, oxalate crystal seeds do not need to be additionally added, high-efficiency removal of oxalate at the high temperature is achieved under the condition of low cost, vanadium pentoxide is not prone to being separated out at the high temperature, therefore, vanadium can be further efficiently recycled, and the content of impurities in the recycled vanadium pentoxide is low.

The invention discloses lithium-aluminum-silicon cover plate glass and a strengthening method thereof, and the strengthening method comprises the following steps: carrying out primary ion exchange on the lithium-aluminum-silicon cover plate glass by adopting molten salt containing lithium nitrate, sodium nitrate and potassium nitrate, then carrying out heat preservation at 800-900 DEG C for 60-120s, then carrying out gradient cooling for three times to realize strengthening, and then carrying out secondary ion exchange to obtain the lithium-aluminum-silicon cover plate glass. And preparing to obtain the reinforced lithium aluminum silicon cover plate glass. Wherein three rounds of gradient cooling comprise a first round of cooling treatment: cooling to 650-750 DEG C at a rate of 18-25 DEG C / min; the temperature is reduced to 550-650 DEG C at the speed of 5-9 DEG C / min in the second round of cooling treatment; and a third round of cooling treatment: cooling to 30 DEG C at the rate of 15-25 DEG C / min. According to the invention, the compressive stress depth of the lithium-aluminum-silicon cover plate glass is improved, so that the impact strength is improved, and effective balance between optimal distribution of compressive stress and safety is realized.

The present invention relates to a preparation device and a preparation method of high-purity granular 2,5-dichloroaniline. The preparation method uses spray drying to quickly and effectively separate 2,5-dichloroaniline from components such as a solvent, aniline, o-chloroaniline and m-chloroaniline in a 2,5-dichloroaniline hydrogenation reaction liquid, and uses an antioxidant to protect the color stability of the product. The high-purity granular 2,5-dichloroaniline prepared by the present invention has a purity of more than 99.8%, and after long-term storage, it still has a white appearance and has good product quality.

An automatic waxing mechanism comprises a telescopic movable part, a fixed support part and a power drive part, wherein the telescopic movable part comprises an optical axis and a waxing bracket, and optical axis fixing seats are respectively arranged at both ends of the optical axis, and a fixed axis is arranged at the front end of the waxing bracket in a cantilever structure, and a sleeve is arranged on the fixed axis through a one-way bearing, and wax follows the sleeve to rotate unidirectionally relative to the fixed axis, and a ratchet is coaxially connected to the end face of the sleeve close to the waxing bracket; the fixed support part comprises a fixed block and a ratchet, and a sliding sleeve connected to the optical axis sleeve is arranged on the fixed block, and when the optical axis slides along the sliding sleeve to one end, the wax on the sleeve is driven to extend forward; when the optical axis slides along the sliding sleeve to the other end, the wax on the sleeve is driven to retract backward; when the wax retracts into place, the waxing bracket approaches the fixed block, and the ratchet touches the teeth of the ratchet, and pushes the ratchet to rotate a preset angle, thereby driving the sleeve and the wax to rotate synchronously. The invention realizes automated operation, improves work efficiency, and delivers wax uniformly.

The present invention provides a voltage comparison device based on TFT, comprising: a plurality of comparator units and a plurality of latch units; a bias voltage applied to the comparator unit; a reference voltage is divided by a plurality of resistors connected in series to obtain a plurality of reference voltage divisions, and different reference voltage divisions are respectively connected to the first ends of the plurality of comparator units; the second ends of the plurality of comparator units are all connected to the input voltage; the third end of the comparator unit is connected to the first end of the latch unit; the second ends of the plurality of latch units are all connected to the latch control signal. The present invention can change the comparison reference voltage by changing the bias voltage applied to the comparator unit, and the introduction of the memory unit can prevent the output voltage of the entire voltage comparison device from unnecessary oscillation or other interference with the input, and can control the time when the output appears, while achieving a long-term storage effect.