151results about How to "Improve operational stability" patented technology

The invention relates to a preparation method of phenylmethylamine. The technical scheme adopted by the invention for mainly solving the problems of high catalyst loss, low production efficiency and high intermittent operation labor intensity is as follows: the preparation method of the phenylmethylamine comprises the following steps: mixing the raw material of cyanobenzene with a solvent material or at least one of one part of product materials in a mixing unit, introducing the mixture into a fixed bed hydrogenation reactor to be in contact with hydrogen and a catalyst and carry out multi-phase continuous hydrogenation reaction to obtain a product material containing phenylmethylamine, separating the product material to obtain a phenylmethylamine product, wherein the catalyst is a metal loaded catalyst; and the metal is selected from at least one of Pd, Pt, Cu, Ni, Mo and Fe. The preparation method can be used for preparing phenylmethylamine.

The invention provides a control method and system of a double-arm clothes folding robot, and relates to the technical field of robot control, and the control method constructs a perceived control closed loop by fusing visual, force and tactile multi-modal data. The touch sense and the force sense make up the blind area of the vision in the self-shielding scene, and grabbing, sliding and pleating perception is improved. Based on clothing joint characterization of a visual semantic network, geometric morphology, semantic components and confidence coefficient are structured and coded, a robust state fusing prior and real-time observation is provided for planning, and decision errors caused by deformation and noise are reduced. Long-time-history folding is decomposed into sub-target sequences through a hierarchical strategy, action closed-loop correction is conducted through multi-modal data, and cooperative control over grabbing, folding and pleating is achieved. And finally, a torque instruction is generated based on a control algorithm, interaction compliance and safety are ensured, and the folding success rate and operation stability of the double-arm clothes folding robot under different materials, sizes and initial forms are integrally improved.

The utility model relates to the technical field of medicament mixing assistors, and discloses a double-component medicament opposite-extrusion mixing assistor which comprises a transverse plate, a transverse plate and a transverse plate, the two fixed seats are oppositely mounted on two sides of one end of the transverse plate; the extrusion roller is rotationally mounted between the two fixed seats through a rotating shaft; the clamping groove is formed in the outer wall of the extrusion roller in the axial direction of the extrusion roller; and the pressing mechanism is arranged in the clamping groove and used for pressing the bag tail in the clamping groove. According to the double-component medicament opposite-extrusion mixing assist device, the tail part of a medicament bag is fixed in the clamping groove, and when the extrusion roller rotates, the extrusion force generated when the bottom of the medicament bag penetrates through a gap between the extrusion roller and the transverse plate is utilized, so that the medicament bag can be uniformly extruded, time and labor are saved, and the mixing efficiency of the double-component medicament is improved.

A bifocal endoscope objective and endoscope, relating to the field of optical technology, includes a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power and movable along the optical axis from the object side to the image side, a fourth lens with positive optical power, a fifth lens with negative optical power, and a sixth lens with negative optical power, arranged sequentially along the optical axis from the object side to the image side. The objective has a total optical length ≤ 6.8 mm and a full field of view ≥ 160°. The third lens is configured to change the air gap between the third lens and the second and fourth lenses by moving it along the optical axis to a first axial position or a second axial position, respectively corresponding to a long-distance observation mode and a short-distance observation mode, while maintaining a constant total optical length during the switching process. This objective achieves stable bifocal switching with a constant total optical length during the switching process in an extremely compact structure.

The utility model discloses a head structure of a spreader. The head structure comprises a center rod, a rear blade, a front blade, an outer pipe, a handle, a rotating wheel, a fixing pin and a pin shaft. The rotating wheel is arranged at the tail end of the handle; the handle is fixedly provided with an outer tube; the center rod sequentially penetrates through the outer pipe and an inner cavity of the handle to be connected with the rotating wheel, and the rotating wheel is rotated to drive the center rod to stretch out and draw back. A pair of front blades is mounted at the front end of the center rod through a pin shaft; the front end of the outer pipe is connected with a pair of rear blades through a fixing pin; and the rear blade is connected with the front blade through a pin shaft. The center rod is controlled to stretch out and draw back through rotation of the rotating wheel, the rear blade and the front blade are driven to be opened and closed, all parts are connected through the pin shafts, and the strength of the instrument and the operation stability are improved.

The utility model relates to the technical field of medical instruments, in particular to a special clamping and connecting mechanism for a dental handpiece diagnosis and treatment in-vitro simulation platform. According to the technical scheme, the dental handpiece comprises a platform body, a shaft fixing base and a dental handpiece body, a sliding base is arranged on the platform body in a front-back sliding mode, the shaft fixing base is arranged on the sliding base in a left-right sliding mode, and the dental handpiece body is arranged on the shaft fixing base through a positioning assembly. The positioning assembly adopts an upper and lower double-clamping fixing design, so that the clamping coaxiality of a machine needle of the dental handpiece body can be ensured, and the positioning assembly consists of a handpiece left fixing clamp, a special connector, a handpiece right fixing clamp, a shaft fixing top seat and a positioning shaft. According to the utility model, an upper and lower double-clamping structure is adopted, so that the stability of the dental handpiece body during high-speed operation is enhanced, and looseness is prevented; the positioning assembly is precise, the clamping coaxiality of the machine needle is ensured, and the experimental error is reduced; the specially-made connector is provided with a customizable arc surface and a customizable round concave part, so that the connector is adaptive to various mobile phone models.

The utility model discloses an agricultural machinery soil turning device, including buffer connecting device, through buffer connecting device connection traction machinery, frame, the frame passes buffer connecting device fixed mounting, the frame has the mouth of installation, the frame is fixedly installed with the support board in the one end away from the mouth of installation, through support board with the frame is equipped with the wheel, the pivot, the pivot rotatory mounting is in the mouth of installation, the pivot is fixed with the rotating roller, a plurality of soil turning hooks are installed to the outer wall department of rotating roller, when the wheel is used to the land surface, and the soil turning hook is driven into the soil after the rotating roller, drive arrangement, drive arrangement passes through support board device, and drive arrangement is equipped with transmission unit between cooperation with the pivot, and this device can buffer when having greater impact force.

The utility model relates to a comfortable office chair and belongs to the technical field of office chairs. A comfortable office chair comprises chair legs with a base and a plurality of forked parts, a gas spring supporting column arranged based on the base, a swivel chair tray arranged based on the gas spring supporting column, a chair seat and a backrest, and further comprises a back-through bearing body arranged based on the swivel chair tray, the through-back bearing body comprises a bearing body provided with a chair seat bearing part and a backrest bearing part, and a chair seat supporting body arranged based on the bearing body; and the chair seat is arranged on the basis of the chair seat supporting body. According to the utility model, the comprehensive performance of high stability, high fitting degree and long service life is realized through structural innovation, the seat cushion is suitable for sedentariness scenes such as offices and meetings, and the user experience is remarkably improved.

This invention provides a collector for recovering platinum group metals (PGMs) from spent catalysts, its preparation method, and its application, belonging to the technical field of precious metal recovery. The collector comprises a copper matrix, a flux, a framework support, and a lattice activator: the copper matrix, flux, and lattice activator are loaded on the surface of the framework support; the copper matrix is ​​elemental copper or a copper-based compound; the flux is boric acid or a borate; the framework support is a porous inorganic material; and the lattice activator is tin, a tin alloy, or a metal sulfide. The collector serves as a collector for the pyrometallurgical recovery of PGMs from spent catalysts. This invention constructs a multi-component synergistic collector composed of a copper matrix, flux, framework support, and lattice activator, which significantly improves the recovery rate of PGMs, especially rhodium, from spent automotive exhaust purification catalysts in pyrometallurgical treatment, and reduces the smelting temperature required for pyrometallurgical treatment, thus significantly reducing energy consumption.

The utility model relates to the technical field of coke oven doors, in particular to a reinforcing structure for a coke oven door, which comprises an oven door, a reinforcing component and a connecting plate, one end of the connecting plate is fixedly connected with the oven door, and the other end of the connecting plate is connected with an oven box through bolts. A mesoporous silica heat insulation layer is arranged on the rear side of the furnace door, and the reinforcing assembly comprises a U-shaped frame, a limiting cover, a limiting rod, a rotating frame, a worm gear and a worm. By means of the design, the sealing performance and the heat insulation performance between the furnace door and the furnace box are improved, heat loss and gas leakage are effectively reduced, the deformation problem of the furnace door in the high-temperature environment can be relieved, and therefore the service life of equipment is prolonged, and production efficiency and safety are improved.

The utility model relates to the technical field of guide wire equipment, in particular to a guide wire operation platform with expansion, which comprises a support plate, an operation platform is arranged at the top of one side of the support plate, the operation platform is adjusted by a lifting adjusting component to perform lifting operation, one side of the operation platform is connected with an expansion platform, and the expansion platform covers the upper part of the body of a patient. The operating platform is located on one side of the patient body, one end of the operating platform is telescopically and slidably connected with a push-pull plate, and a hand supporting plate is mounted at the top of one end of the push-pull plate. According to the guide wire operation platform with the expansion function, bolt or welding fixation is not needed, the supporting plate can be directly plugged under an operation mattress for positioning, and the requirements of different heights are met; the guide wire frame can be quickly taken out for disinfection after being used, is compactly stored when not used, solves the problems that a traditional guide wire frame is tedious to disassemble and assemble and occupies space, and reduces operating room instrument management cost.

The utility model discloses an ultraviolet-biological coupling reactor which comprises an organic waste gas collecting device, the organic waste gas collecting device is connected with an air inlet pipe, an ultraviolet lamp tube is arranged in the air inlet pipe, the other end of the air inlet pipe is connected with a biological tower, a filler layer is arranged in the biological tower, and the top of the biological tower is connected with a centrifugal fan. A pH meter is arranged in the biological tower, a water drainage port of the biological tower is connected with a water drainage electric valve, a floating ball valve is arranged in the biological tower, and the floating ball valve is connected with a water replenishing tank; the biological tower is connected with a medicament storage tank, and the biological tower is also connected with a pressure difference transmitter. The device disclosed by the utility model has the advantages of higher economical efficiency, higher operation stability, high operation efficiency and good waste gas treatment effect.

This utility model relates to the field of logistics and transportation technology, and discloses a transport vehicle, including a main body with two roller assemblies at its bottom and a support member located between the roller assemblies, wherein the support member and the axes of the two roller assemblies are staggered; a lifting assembly including a movable rod and a connecting rod structure, the movable rod being vertically mounted on the main body and having a clamping assembly on it, the connecting rod structure including a vertically arranged first connecting rod and a second connecting rod, one end of the first connecting rod being connected to the movable rod and the other end being hinged to the second connecting rod to form a first hinge point, the second connecting rod being hinged to the main body to form a second hinge point, and having a foot pedal on it; when the user applies pressure to the foot pedal, the support member abuts against the ground, the second connecting rod rotates around the second hinge point, and drives the first hinge point to displace along a preset trajectory, so that the first connecting rod drives the movable rod to perform lifting and lowering movements. The advantages of this utility model are that it has a simple structure, is easy to operate, and has low production costs.

This invention discloses an anti-fog and heat-insulating puncture device for thoracoscopic surgery, belonging to the field of medical device technology. Its key technical features include: an outer sheath, with a puncture assembly on its inner wall, the puncture assembly including a puncture needle core that slides through the inner wall of the outer sheath, a needle core handle fixedly connected to the upper end of the puncture needle core, a needle tip fixedly connected to the lower end of the puncture needle core, an outer sheath seat fixedly connected to the upper outer wall of the outer sheath, a fixing handle fixedly connected to the outer wall of the outer sheath seat, and a sealing assembly on the outer wall of the outer sheath seat. This invention achieves heat insulation through a double-layer structure formed by the outer and inner sheaths; gas circulation is formed through the cooperation of the air inlet and outlet holes, effectively expelling fog from the inner wall of the inner sheath and ensuring a clear surgical field; the sealing valve and sealing sleeve achieve internal sealing of the outer sheath to prevent gas leakage; the sealing ring is precisely positioned by positioning pins and positioning holes, and the sealing cap is stably installed by locking blocks and protruding pins, providing double sealing to prevent gas leakage and impurity entry, reducing the risk of infection.

The application provides a ketoreductase mutant and application thereof in synthesis of a key chiral intermediate of tigogaral, and provides a ketoreductase mutant with an amino acid sequence as shown in SEQ ID NO: 4, 6, 8, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40 or 42. The ketoreductase mutant has higher carbonyl catalytic activity and chiral selectivity than a wild type, and is used for preparation of a key intermediate R-5,7-difluorobenzodihydropyran-4-ol of tigogaral.

This utility model relates to the field of coffee powder dispensing technology and discloses an integrated coffee powder dispenser, including a dispenser body, an inlet, a measuring hopper, and a capsule. The dispenser body has an inlet at the top, a measuring hopper at the bottom of the inlet, and a capsule at the bottom end of the dispenser body. The dispenser body is equipped with a rotating component, a pressing component, and a buffer component. The rotating component is located at the bottom of the measuring hopper, the pressing component is located on the rotating component, and the buffer component is located at the bottom of the capsule. This utility model proposes to use the rotating component and the cooperation of the rotating and lower dispensing trays to achieve uniform distribution of coffee powder to multiple capsules. The pressing component has a combination structure of a pressing rod and a spring, which can provide stable and consistent pressure during pressing. The buffer component provides stable support to the bottom of the capsule through a buffer pad and a snap-fit ​​structure, effectively reducing the shaking and displacement of the capsule during pressing, improving operational stability, and improving coffee powder dispensing efficiency.

The utility model provides a dry quenching poisonous and harmful gas discharge system which comprises a dry quenching furnace, a belt vestibule, a belt conveyor assembled in the belt vestibule, an interlocking signal protection device and a central control room, wherein a coke discharge port is formed in the bottom of the dry quenching furnace, and a flat valve is arranged in the coke discharge port; the lower part of the coke discharge port is connected with an electromagnetic vibration feeder, a discharge port of the electromagnetic vibration feeder is connected with a feed port of a rotary sealing valve, and a discharge port of the rotary sealing valve is connected with a coke discharge chute; linkage protection is added when running signals of the environment dust removal fan of the coke dry quenching device are lost, the axial flow fan is started to replace gas in the vestibule of the belt conveyor, the concentration of poisonous and harmful gas is reduced, the audible and visual alarm reminds people to evacuate in time through voice, personal injury accidents are avoided, the safety of workers is protected, operation is convenient, and the working efficiency is improved. The maintenance cost is low, and the applicability is wide.

The application discloses a complex sand core gas evolution and local temperature coupling control device which is composed of a central control cabinet, a circulating machine, a water tank, a vacuum pump, a sand core exhaust heat dissipation pipeline and a conformal patch, wherein the central control cabinet is connected with the circulating machine, the vacuum pump and a pouring control system, the main body of the central control cabinet is a central control computer and a PLC electric control system, and the central control cabinet is used for receiving a pouring signal and controlling the circulating machine and the vacuum pump; a cooling system is arranged in the circulating machine, a liquid inlet end of the cooling system is connected with the water tank, and a liquid outlet end of the cooling system is connected with a liquid inlet of the sand core exhaust heat dissipation pipeline; one end of the water tank is connected with the circulating machine, and the other end of the water tank is connected with a liquid outlet of the sand core exhaust heat dissipation pipeline; and the main body of the sand core exhaust heat dissipation pipeline is a copper pipeline, and the middle section of the copper pipeline is tightly attached to the conformal patch. The device can solve the problems that the existing sand casting technology cannot realize the local temperature field control of complex irregular inner cavities, the end sand core gas evolution cannot be discharged in time and the like, and high-quality cores which meet the complex inner cavity forming and quality requirements of high-end aluminum alloy castings can be produced.

The utility model relates to the field of ceiling fan installation accessories, in particular to a fast-assembly mechanism applied to a ceiling fan and used for fixing an upper cup, the ceiling fan comprises a ceiling fan body, a hanging rod and the upper cup, the fast-assembly mechanism is arranged on the hanging rod and can be adjusted up and down in the length direction of the hanging rod, and the fast-assembly mechanism comprises an installation sleeve assembly and a locking assembly. And the two are connected and matched to lock the whole quick-mounting mechanism and the upper cup on the hanging rod. The upper cup is fixed to the preset position of the hanging rod through the quick mounting mechanism, the problems that in the prior art, the upper cup and the external thread column are integrally formed, molds of different types of upper cups matched with the external thread column need to be produced, and the stock burden of accessories is increased are solved, the quick mounting mechanism can be independently manufactured and then matched with the different upper cups to meet the mounting requirement, and the mounting efficiency is improved. The overall manufacturing cost of the ceiling fan is reduced, good universality is achieved, and the quick mounting mechanism further has the advantages of being convenient to mount and operate and reliable in structure.

The invention discloses a vacuum flash tower based on vacuum deep distillation and a crude oil processing system and method, and belongs to the technical field of petroleum refining. According to the method, vacuum residue at the bottom of a vacuum tower is subjected to secondary flash evaporation by additionally arranging a vacuum flash evaporation tower, and light components (mainly wax oil) in the vacuum residue are further recovered. The vacuum flash tower adopts a combined design of an upper packed tower section and a lower plate tower section, the packed tower section is used for absorbing light components, and the plate tower section is used for prolonging the residence time of residual oil. And part of vacuum third-line wax oil extracted from the side line of the vacuum tower enters the top of the flash tower as an absorbent, absorbs flash light components and then is refined back to the vacuum tower, so that the product quality is ensured. The vacuum flash tower and the vacuum tower share a vacuum system, and the tower pressure is maintained at 4 kPa. According to the method, the vacuum residue extraction rate is remarkably increased, vacuum equipment does not need to be additionally arranged, the problem that light-component metal and residual carbon exceed the standard in a traditional process is solved, and economic benefits are remarkable. The method is suitable for heavy crude oil processing and has the advantages of low equipment investment, simple operation and the like.

This utility model discloses a mold polishing cutter, including a holding section, an extension section, and a polishing section. The holding section is installed at the upper end of the extension section, and the polishing section is installed at the lower end of the extension section. Polishing stripes are provided on at least a portion of the lower end of the extension section and on the polishing section. There is an angle between the polishing section and the extension section, and the angle range is set to 150-180°. The above structure retains the efficient processing capability of a straight polishing cutter on a flat surface, and can penetrate into complex areas such as corners and grooves of the mold through a large tilt angle, reducing polishing dead angles and improving the comprehensiveness of surface treatment. It has significant improvements in polishing range, operational stability, adaptability, and durability, and can effectively meet the high-efficiency and high-precision polishing requirements of complex molds.

The utility model discloses an antibacterial softener storage and use device with an accurate proportioning structure, and aims to provide the antibacterial softener storage and use device with the accurate proportioning structure, which has the advantages that the taking convenience is improved, and the dosage precision is high. The device comprises a base; the bracket is connected with the base; the storage box is connected with the support, and the storage box is connected with a switch assembly; the material receiving assembly is connected with the base, the material receiving assembly is provided with a quantifying cup, and a quantifying plate is movably connected with the base; and the ratio control assembly is connected with the support, the ratio control assembly is provided with a material return pipe, and the material return pipe is connected with the storage box and the quantitative cup. The device has the beneficial effects that various raw materials of the antibacterial softening and moistening agent can be quickly discharged in the device through the storage device, and meanwhile, the quantity can be accurately controlled; accurate control of the proportion is realized; the structural connection and operation stability is improved, and feeding and discharging are convenient to store; the operation efficiency is improved.

The utility model discloses a deposition device, including the reaction chamber, the reaction chamber has the reaction cavity in, the reaction chamber upper portion is provided with the feed port for the single atom from top to bottom to enter the reaction cavity, the reaction chamber upper still is provided with the gas inlet and the gas outlet for the gas to go in and out, be provided with the deposition chamber for the single atom and powder mix in the reaction cavity, the deposition chamber is provided with the stirring mechanism for making the single atom with powder can mix even, the utility model discloses setting stirring mechanism continuously turns over the powder in the deposition chamber, the contact surface of dynamic adjustment powder and single atom / cluster particle, effectively solved the powder easy to conglomeration in the prior art, the low problem of coating efficiency, quality stability difference caused by uneven contact, ensure that powder surface evenly coats single atom / cluster, promote material performance consistency, the structure detachable design has strengthened the operation convenience and environmental adaptability.

The invention relates to the field of nondestructive testing, in particular to a detection method and a detection device based on concave ring array phased array ultrasound. The device is characterized in that an isolation supporting column is arranged between a box body upper cover plate and a box body lower cover plate; two guide openings are formed in the box body upper cover plate; the upper end of the guide positioning pipe is connected with a guide port through an upper centering petal, and the lower end is fixedly connected with the positioning pipe seat; the upper end of the calibration sleeve is connected with the other guide port, and the bottom is connected with the lower bottom plate of the box body; a concave ring array ultrasonic probe is arranged at the lower part of the positioning tube seat, and both are fixed on the lower bottom plate of the box body; the concave surface ring array ultrasonic probe comprises a cylindrical concave surface ring array probe and a conical concave surface ring array probe which are stacked up and down; the lower centering petal is arranged in a cladding tube inspection sleeve on the lower bottom surface of the lower bottom plate of the box body; and the concave ring array ultrasonic probe, the upper centering petal and the lower centering petal are coaxially arranged. According to the invention, full-range detection of the cladding tube is realized, and detection precision and range coverage requirements are ensured.

The utility model relates to a kind of sample bottle bottle-opening device, sampling device and stereoscopic structure detection device, it includes drive mechanism, screw cap mechanism, fixed mechanism and tray mechanism, wherein, the support module of tray mechanism includes several modularized racks, rack can make the sample bottle suspended on it Setting;Screw cap mechanism can be clamped to sample bottle, to make under the driving effect of drive mechanism drive sample bottle to carry out multidimensional motion, and can be transferred to the sample bottle placed on tray mechanism to fixed mechanism;The bottle body support plate of fixed mechanism can support the bottle bottom of sample bottle, and by bottle gripper from the opposite side of sample bottle Clamping, to realize the limiting of the bottle body of sample bottle;When the bottle body of sample bottle is limited by fixed mechanism, the bottle-opening gripper of screw cap mechanism can make the bottle cap of sample bottle be limited by the way of tightening bottle-opening gripper, and by bottle-opening motor drive bottle-opening gripper drive bottle cap to rotate.

This utility model discloses a multifunctional fire hose, including a hose. The hose features a continuous array of arched protrusions in its anti-slip layer, periodically arranged along the hose's axis, providing multidirectional and continuous friction. This effectively reduces slippage when firefighters push, pull, or twist the hose, making the operation more reliable. The vents in the protective layer ensure good air permeability while preventing dust and debris from entering, providing reliable protection for the load-bearing layer. The first color-changing zone in the load-bearing layer, relying on an activated carbon adsorption layer and chemically sensitive capsules, can promptly indicate the presence of toxic gases. The second color-changing zone, aided by a conductive tape and a heat-sensitive capsule, can quickly indicate high-temperature areas. These two color-changing zones are staggered along the hose and, with the separation of spacers, achieve independent responses, avoiding interference between signals. This allows firefighters to quickly and accurately assess on-site risks, significantly improving the safety and overall efficiency of firefighting operations.

The utility model relates to a kind of card bus wheel positioning magnetic suction type clamp, including the clamp main plate with three outer extension positioning arms, the center main shaft for installing wheel target is installed in the middle part of clamp main plate outer side;Three outer extension positioning arms on the inner side of clamp main plate each assemble a magnetic suction positioning assembly for with wheel hub plane suction positioning.The utility model is used for all card bus positioning instrument, when photoelectric positioning, clamp center main shaft does not need to rotate, when 3D positioning, center main shaft can rotate relative to clamp, without pushing trolley or reversing, reduce the difficult problem of trolley laborious and rotation angle difficult to accurate control in traditional clamp measurement process.Magnet of conical surface structure is used to automatically align and quickly adsorb positioning, improve positioning operation efficiency and positioning accuracy, compared with traditional clamp more accurate and fast controllable.Safety lock assembly further increases the operation stability of clamp, avoid clamp instability falling in process.

The application discloses a garden engineering full life cycle dynamic simulation and collaborative design method and system based on digital twinning and BIM. The system comprises a data acquisition layer, a unified operation model core engine, a dynamic simulation and safety prediction module, a twinning visualization platform and a real-time early warning execution module. The unified operation model integrates a plant dynamic growth sub-model, a park static environment characteristic sub-model and an external force environment dynamic load sub-model, realizing multi-time scale coupling simulation of plant long-term growth succession and instantaneous external force response. The dynamic simulation module simulates the elastic swing, plastic deformation, branch breakage and overall collapse process of plants under the action of external force (wind, snow), and accurately predicts the damage risk of collapsed plants to road personnel, power lines, buildings, waterways and other infrastructure based on spatial swept volume collision detection and damage criterion. The application realizes the intelligent leap of garden engineering from static display to dynamic prediction, from post-disposal to pre-warning.

The application discloses an electric cleaning brush, which comprises a brush handle assembly, a rotating assembly and a brush head assembly. The brush head assembly is provided with a driving motor and a transmission assembly. The driving motor drives a first brush disc and a second brush disc to rotate through a gear and a belt transmission structure respectively. The rotating directions of the first brush disc and the second brush disc are opposite, which effectively offsets the rotating unbalanced moment, improves the cleaning stability and the cleaning efficiency.