121results about How to "Little wind effect" patented technology

The invention discloses a spiral line cable detecting robot which consists of a cart, an upper and a lower supporting hugging devices symmetrically distributed along the cable which are connected together. The robot is characterized in that the active cart is provided with a climbing device and a magnetic absorbing device; two supporting horizontal levers are provided with hugging devices; the climbing device includes a lithium battery fixed in the cart and a DC motor fixed on one side of the driving wheel in the cart; power of the DC motor is supplied by the lithium battery, and the DC motor drives the driving wheel of the cart to rotate by a drive axle, so as to drive the whole robot to spirally climb along a water transmission line of the cable; the hugging devices and the magnetic absorbing device work together to tightly press the driving wheel onto the surface of the cable. The climbing device can rotate for any degree relative to the cart, so as to adapt to the water transmission line with different thread pitch; power supply by the lithium battery is more suitable for the environment of high-altitude operation; the robot is also provided with a descending device, which is safer and more reliable in use. The invention has simple and reasonable structure, is convenient in maintenance, can have high climbing speed, is applicable in detection of the spiral line cable of large cable-stayed bridges as well as lamps and other rod types.

The invention relates to erecting construction of a steel pipe concrete arch bridge, especially a door crane-used half-arch integral steel pipe arch hoisting process, dividing each arch rib into two hoisted units, where each 1 / 2 arch is hoisted by two door cranes, where a fixed door crane serves as an arch span hoister and an active door crane serves as an arch foot hoister. And the invention is applied to bottom, middle and top bearing arch bridges constructed by bracket-free process. And the span of the steel pipe arch installed by the invention can reach above 300 meters, and the weight of the installed steel pipe can reach above 2000 tons. And it does not influence navigation, able to applied to single- or multiple- span construction; the hoisting safety is higher; and the shape of the arch axis is good; it needs no huge anchoring system and applied to various arch bridges.

The invention relates to a multi-rotor unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises an unmanned aerial vehicle body, motors, rotors, rotor protecting frames and foot frames, wherein the motors are mounted on the periphery of the unmanned aerial vehicle body; each rotor is mounted on a rotating shaft of the corresponding motor; each rotor protecting frame is arranged on the periphery of the corresponding rotor; the foot frames are connected to a position under the unmanned aerial vehicle body; in addition, a hanging rod is also arranged on the multi-rotor unmanned aerial vehicle; a hanging ring is arranged at one end of the hanging rod, and a hanging hook is arranged at the other end of the hanging rod; the hanging rod is hung on the unmanned aerial vehicle body of the multi-rotor unmanned aerial vehicle through the hanging ring, and can rotate around the unmanned aerial vehicle body; and when the multi-rotor unmanned aerial vehicle is under the hanging condition, the hanging rod is suspended under the unmanned aerial vehicle body. Through the hanging hook on the hanging rod, the multi-rotor unmanned aerial vehicle disclosed by the invention can be hung on objects at high positions including a wire, a branch, a road lamp cross bar, a billboard, a balcony railing, a high building rooftop enclosing wall and the like to work, so that the time for airborne equipment to work at the high position can be greatly prolonged, and under the hanging condition, the attitude and the position of the multi-rotor unmanned aerial vehicle are stable.

The invention discloses an adhering self-elevating-type tower crane for hoisting wind power equipment. The adhering self-elevating-type tower crane of the wind power equipment comprises an elevating device, a main framework, a main clasping oil cylinder, a main clasping arm, an auxiliary framework, an auxiliary clasping oil cylinder, an auxiliary clasping arm and an elevating oil cylinder; the axial direction of the elevating oil cylinder is the vertical direction; an oil cylinder seat and a piston rod of the elevating oil cylinder are respectively connected with the main framework and the auxiliary framework; the oil cylinder seat of the main clasping oil cylinder is installed on the main framework; a piston rod of the main clasping oil cylinder is connected with the main clasping arm; the main clasping arm is arranged on the inner side of the main framework; an oil cylinder seat of the auxiliary clasping oil cylinder is installed on the auxiliary framework; a piston rod of the auxiliary clasping oil cylinder is connected with the auxiliary clasping arm; the auxiliary clasping arm is arranged on the inner side of the auxiliary framework; the inner side of the main clasping arm and the inner side of the auxiliary clasping arm are both used for clasping a fan tower section; and the elevating device is installed on the main framework. The tower crane is adhered to the fan tower section repeatedly through the main framework and the auxiliary framework in application, so that the whole tower crane climbs to the required height, and is elevated; the adhering self-elevating-type tower crane for hoisting the wind power equipment has the advantages of light weight, low manufacture cost and less limited conditions.

A personal safety system with a security entrance (4), a holding room (5) connected to security entrance (4), an air curtain device (2) at an entrance door (3) of the security entrance (4),allows a persons to reach the holding room in a short time. To accomplish the object a circulating air system (13, 15, 18, 19, 20, 22, 25, 26) is provided for the interior space enclosed by the security entrance (4) and for the holding room (5). The circulating air system (13, 15, 18, 19, 20, 22, 25, 26) includes at least one air delivery unit (18) and a toxic gas filter (19), an air flushing device (28, 30, 31) with air storage units (29) for the holding room (5) and a gas supply duct (27) in the holding room (5) for respirator products.

The invention discloses a multi-rotor wing unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles.The multi-rotor wing unmanned aerial vehicle comprises a vehicle body, vehicle arms, motors, rotor wings, foot stands and the like and is characterized in that a hanging rack is arranged on the vehicle body and provided with a hook or a hanging rod.The multi-rotor wing unmanned aerial vehicle can be hung on a high object such as an electric wire in the air through the hook or the hanging rod arranged on the vehicle in the using process.The multi-rotor wing unmanned aerial vehicle in a hung state does not need to be supplied with lifting force through electric energy, most of battery energy can be supplied to equipment carried by the unmanned aerial vehicle for use, and therefore the working time of the working equipment in one time of the rising and falling process can be greatly prolonged.The multi-rotor wing unmanned aerial vehicle can be widely applied to the fields of fixed-point monitoring in the air, monitoring, shooting, environmental protection monitoring, field expedition, case reconnaissance, city management, courtyard security and protection, vehicle guard, express transportation and the like.

The invention provides a multi-rotor-wing unmanned aerial vehicle. The multi-rotor-wing unmanned aerial vehicle comprises a vehicle body, vehicle arms, motors, rotor wings and a foot stand, the vehicle arms are connected to the vehicle body, the motors are mounted on the vehicle arms, the rotor wings are connected to rotary shafts of the motors, and the foot stand is arranged on the lower portion of the vehicle body. In addition, a detachable protective frame is further arranged on the vehicle body or the vehicle arms of the multi-rotor-wing unmanned aerial vehicle. In the vertical direction, the peripheral outline of the protective frame is larger than the rotating range of each the rotor wing. A hanging rope is further connected to the protective frame, the hanging rope passes through the outer edge of the protective frame and hangs, and a hook is connected to the tail end of the hanging rope. The multi-rotor-wing unmanned aerial vehicle can be hung at an object of a high position through the hanging rope and the hook. After being hung at the object of the high position, work equipment carried on the multi-rotor-wing unmanned aerial vehicle can work or be on standby at high positions for a long time. The multi-rotor-wing unmanned aerial vehicle can be widely applied to the fields of aerial fixed-point surveillance, monitoring, shooting, environmental protection monitoring, city management, courtyard security and protection, vehicle burglary prevention, animal scientific research and the like.

The invention discloses a multi-rotor unmanned aerial vehicle and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises a body, arms, motors, rotors, protection frames, scaffolds and the like and is characterized in that a hanging bracket is further arranged on the body and comprises a hook, a hanging rod, a base and rotating shafts, wherein the hook is arranged at the upper end of the hanging rod, the base is arranged at the lower end of the hanging rod, the rotating shafts are arranged on the base and located in the clamping positions of the body, and the hanging bracket can rotate around the rotating shafts. During use, the multi-rotor unmanned aerial vehicle can be hung on an object in a high position through the hook on the hanging bracket. The multi-rotor unmanned aerial vehicle in the hanging state doesn't need battery power for supplying lift force, and the working time of airborne working equipment in a take-off and landing process can be prolonged greatly. The multi-rotor unmanned aerial vehicle can be widely applied to the field of fixed point monitoring in the air, surveillance, shooting, environmental monitoring, field scientific investigation, case reconnaissance, city management, courtyard security and protection, vehicle guard, express transportation and the like.

The invention relates to a multi-rotor unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises a vehicle body, vehicle arms, motors, rotary wings and foot supports. The vehicle body is provided with a hanging support. The hanging support is provided with a hook. The lower part of the hook is provided with protective bars used for protecting the rotary wings. The hanging support is connected to a hanging support connecting port in the vehicle body through a hanging support connecting head at the lower end of the hanging support. During using, the multi-rotor unmanned aerial vehicle can be hung to an object on high through the hook, for example the multi-rotor unmanned aerial vehicle can be hung to electric wires in the air. Electricity is not needed to supply the lift force of the multi-rotor unmanned aerial vehicle in a hung state, and most of electricity of a battery can be supplied to devices carried by the multi-rotor unmanned aerial vehicle, thus greatly prolonging the working time of working devices in a descending and lifting process. The multi-rotor unmanned aerial vehicle can be widely used for fixed-point monitoring in the air, monitoring, camera shooting, environment protection monitoring, field scientific investigation, case reconnaissance, city management, courtyard security and protection, vehicle thievery prevention, express delivery, and other fields.

The invention discloses a cable-stayed bridge concrete cable tower surface detecting robot based on grabbing claws, which comprises a robot body mechanism, a first claw module set, a second claw module set and a crawl driving device, wherein the first claw module set and the second claw module set are arranged on the robot body mechanism, the crawl driving device is used for driving the first claw module set and the second claw module set to alternately crawl; the first claw module set at least comprises a first grabbing claw module and a second grabbing claw module; and the second grabbing claw module set at least comprises a third grabbing claw module and a fourth grabbing claw module, the grabbing claw modules comprise a steering engine, an annular soft shaft and at least three miniature pointed hooks, wherein the annular soft shaft is driven by the steering engine, the miniature pointed hooks are arranged on the annular soft shaft, and the bending directions of the miniature pointed hooks all point to the center of the annular soft shaft. Compared with the prior art, the robot has the advantages of simple structure, light dead weight, lower energy consumption and convenience of climbing and can be suitable for various conditions of climbing on concrete wall surfaces with larger influences of wind-mouthed vibration.

The invention relates to a multi-rotor unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises a vehicle body, enginearms, motors, rotors and a foot stool, wherein one ends of the engine arms are connected to the machine body, the motors are arranged on the engine arms, the rotors are arranged on rotating shafts ofthe motors, the foot stool is connected under the machine body, in addition, a sucker hanging rack and a hook hanging rack are further arranged on the machine body, a sucker and a support are arranged at the outer end of the sucker hanging rack, and a hook is arranged at the outer end of the hook hanging rack. The multi-rotor unmanned aerial vehicle can be adsorbed on curtain wall glass of a tallbuilding or window glass of a house through the sucker hanging rack or can be hung on an object on high such as an electric wire and branches in the air through the hook hanging rack; and after beingadsorbed or hung on the object on high, the multi-rotor unmanned aerial vehicle does not need to be provided with lift force by electric energy of a battery, and working equipment of the multi-rotorunmanned aerial vehicle can work or stand by on high for a long time. The multi-rotor unmanned aerial vehicle can be widely applied to the fields of aerial fixed-point shooting, monitoring, living broadcasting, environmental protection monitoring, case reconnoitre, urban management, courtyard security and protection, vehicle anti-theft and the like.

The invention discloses a self-pressurization type spraying device for a plant protection unmanned aerial vehicle. The device comprises an unmanned aerial vehicle body and a mounting box arranged below the unmanned aerial vehicle body, a water tank is connected into the mounting box through a reinforcing rod, a stirring mechanism is arranged on the mounting box, and a pressurization mechanism connected with the stirring mechanism is arranged in the water tank; a hollow rod communicating with the pressurization mechanism is rotatably arranged at the bottom of the pressurization mechanism, the end, penetrating to the bottom of the mounting box, of the hollow rod is connected with an annular spraying pipe communicating with the hollow rod, and a driving mechanism for driving the hollow rod torotate is arranged in the mounting box; through the arrangement of the stirring mechanism and the pressurization mechanism, the stirring mechanism enables liquid medicine and water to be sufficientlymixed, the pressurization mechanism is used for pressurizing, so that the liquid medicine is sprayed out from a lower nozzle of the annular spraying pipe, the influence of wind power on the liquid medicine in the spraying process is reduced, the spraying effect is improved, a pressurizing element does not need to be additionally arranged, and the production cost is reduced; and by arranging the driving mechanism, the annular spraying pipe continuously rotates in one direction, and therefore the spraying range of the spraying device is enlarged.

The invention provides a hanging frame for a multi-rotor-wing unmanned aerial vehicle and belongs to a tool matched with the unmanned aerial vehicle.The hanging frame comprises a hook, a main rod, a protective rod and a base, wherein the hook is connected to the upper end of the main rod, the protective rod is connected to the middle-lower portion of the main rod, the base is connected to the lower end of the main rod, and a magnet is arranged under the base.After hanging frame is put on a multi-rotor-wing unmanned aerial vehicle body, the magnet under the base of the hanging frame can mutually attracted with an irony sheet on the multi-rotor-wing unmanned aerial vehicle body, and the hanging frame and the multi-rotor-wing unmanned aerial vehicle form a whole.After the hanging frame is installed, the multi-rotor-wing unmanned aerial vehicle can be hung on an object at a high place through the hook on the hanging frame in use.The multi-rotor-wing unmanned aerial vehicle in a hung state can work for a long time in the 'air'so that the multi-rotor-wing unmanned aerial vehicle can be widely applied to the fields of in-the-air fixed-point monitoring, monitoring, shooting, environmental protection mentoring, field scientific investigation, case reconnaissance, urban management, courtyard security and protection, vehicle thievery prevention, express delivery and transportation and the like.

The invention relates to an air-drop protective system. The system comprises a parachute and at least one safety protective device, wherein the safety protective device comprises a safety air bag, an air generator and an impact switch; one end of the safety air bag is directly or indirectly connected with a carrier of the parachute, the other end of the safety air bag is connected with an air output end of the air generator, and the other end of the air generator is directly or indirectly connected with the impact switch. The system not only can enable air-drop objects to fall to the ground more stably and more safely during normal air drop, but also can have a certain protective effect on the air-drop objects, particularly on a pilot when the parachute cannot be opened normally within a set height; wind power has a smaller influence on the system during air drop.

The invention discloses an emergency tent for power safety. The emergency tent comprises a tent frame and tent cloth. The tent frame comprises a ground pole, an upright and a top beam; the ground pole surrounded into a rectangle is provided with a bottom column cross joint connected with the upright; an edge cross joint is arranged on the middle part of the lambdoidal top beam; an end wall cornice tee joint is arranged on the end part of the lambdoidal top beam; one end of the upright is inserted into the bottom column cross joint of the ground pole, and the other end of the upright is inserted into the edge cross joint or the end wall cornice tee joint of the top beam; a pull rope is arranged on the tent cloth; and the other end of the pull rope is connected with a hook pile anchored on the ground. The invention is fast to erect and collect, convenient to use mechanically in emergency, light and flexible and has simple structure and high safety coefficient, thus being especially suitable for the outside personnel of a power company for outdoor power maintenance and aid repair to accommodate.

The invention relates to a multi-rotor unmanned aerial vehicle, which belongs to the technical field of unmanned aerial vehicles, and comprises a vehiclemachine body, a motor, rotors, a rotor protection frame and a foot stand, wherein the motor is arranged on the periphery of the vehiclemachine body; the rotors are arranged on a shaft of the motor; the rotor protection frame is arranged on the peripheries of the rotors; the foot stand is connected under the vehiclemachine body. In addition, a hanging rod is also arranged on the multi-rotor unmanned aerial vehicle, a hanging ring is arranged on one end of the hanging rod, and a magnet is arranged on the other end of the hanging rod. The hanging rod is hung on the machine body of the multi-rotor unmanned aerial vehicle through the hanging ring, and can rotate around the machine body. When the multi-rotor unmanned aerial vehicle is at a hovering condition, the hanging rod is hung under the machine body. The multi-rotor unmanned aerial vehicle provided by the invention can be hung an irony advertising board, a light pole, a traffic sign cross rod, an outdoor air conditioner, an iron stand, and iron tower and the like to work through a magnetic force of the magnet on the hanging rod, so that the work time of airborne equipment at a high place is greatly prolonged, and a posture and a position of the multi-rotor unmanned aerial vehicle are stable at a hanging state.

The invention discloses a multi-rotor unmanned plane, and belongs to the technical field of an unmanned plane. The multi-rotor unmanned plane comprises a plane body, a plane arm, a motor, a rotor wing, and a foot stool; the plane arm is connected to the plane body, and the motor is installed on the plane arm; the rotor wing is connected to a rotary shaft of the motor, and the foot stool is arranged beneath the plane body; besides, a suspending rod is further arranged on the plane body, the upper end of the suspending rod is provided with a magnetic absorbing head; a suspending hook is further arranged on the suspending rod. In use, the multi-rotor unmanned plane can be absorbed and suspended on an iron object at a high place through the magnetic absorbing head on the suspending rod, or suspended on an electric wire in the air, branches and other objects through the suspending hook. The lifting force of the multi-rotor unmanned machine in a hanging state is not provided by power energy of the battery, thus the working time of an onboard working device can be prolonged greatly in a rising and landing process. The multi-rotor unmanned plane can be widely applied to overhead monitoring at a fixed point, monitoring, live telecast, environmental protection monitoring, case detection, urban administration, courtyard safeguard, vehicle anti-theft, express delivery, and other domains.

The invention discloses a lightning protection device for a high-rise building, and the lightning protection device comprises a lightning rod body, a base and a concrete fixed seat; a through hole is formed in the center of the top end of the base, the bottom end of the lightning rod body is welded in the through hole, and the base is poured in the concrete fixed seat. A plurality of evenly-distributed stabilizing rods are welded to the side wall of the bottom end of the lightning rod body, the stabilizing rods are obliquely arranged, the bottom ends of the stabilizing rods are welded to the top end of the base, a plurality of transverse rods are arranged on the side wall of the lightning rod body, vertically-arranged fastening rods are welded to one ends of two of the transverse rods, and the fastening rods are located at the top ends of the stabilizing rods. An annular plate is welded to the side wall of the lightning rod body, the annular plate is located above the cross rod, and the side wall of the annular plate is slidably sleeved with an annular block. The device is simple in structure, novel in design, high in stability, capable of adjusting the lightning protection range, good in lightning protection effect and suitable for large-scale popularization.

The invention discloses a light grille unit plate and a light ray adjusting device for entrance and exit of a tunnel. The light grille unit plate comprises an outer frame, two light grille brackets and a plurality of V-shaped light grille plates, wherein the outer frame is of a quadrilateral-shaped framework structure and is formed by connecting two opposite edge frames and two opposite seal heads; the two light grille brackets are respectively arranged at the inner sides of the two opposite edge frames and are respectively arranged near the two edge frames, and a plurality of fixing holes are formed in the light grille brackets at intervals; each V-shaped light grille plate is provided with a V-shaped cross section, and comprises two side plates for forming a V-shaped opening; the V-shaped light grille plates are fixedly arranged between the two light grille brackets in parallel through the fixing holes in the light grille brackets, and the V-shaped openings of the V-shaped light grille plates face the same direction, and respectively face one of the two opposite seal heads; the depth of the V-shaped opening of each V-shaped light grille plate is greater than the distance between the two adjacent V-shaped light grille plates.

The invention relates to a tea seedling mulching method. Before or after being planted, tea seedlings are mulched with a black dissoluble mulching film. Before being planted, the tea seedlings are mulched with the mulching film according to the following steps of ridge arranging, mulching film mulching and tea seedling planting, and after being planted, the tea seedlings are mulched with the mulching film according to the following steps of ridge arranging, tea seedling planting, mulching film mulching, hole breaking and watering. The distance between every two ridges is 1.8m. According to the method, the tea seedlings are mulched with the black dissoluble mulching film, the black film is good in reflection effect, and thus heat and moisture preservation and damp resistance are achieved; the roots are mulched with the mulching film, the air permeability is good, and thus the tea seedlings will not be smothered to death; the black dissoluble is long in service life, weeding is not needed, wind effect is small, the survival rate is high, and growth of weeds can be restrained.

The invention provides an automatically-cleaned rotatable solar street lamp which comprises a lamp pole, an LED connecting rod, an LED lamp, a cleaning device, a water gathering device, a solar panelconnecting rod, a solar panel control device, a solar panel and a storage battery. The LED connecting rod is connected to the lamp pole and is connected with the LED lamp, the cleaning device is connected to the LED lamp, the water gathering device is connected to the cleaning device and is connected to the portion above the lamp pole, the solar panel connecting rod is connected to the lamp pole and is connected with the solar panel control device, the solar panel is connected to the solar panel control device, the storage battery is installed in the lamp pole, a plurality of blast reducing grooves are formed in the lamp pole, the cleaning device comprises an electric stretchable rod, a water inlet pipe, a water outlet pipe, a brush plate and a cloth belt, the LED lamp is automatically cleaned, and the illumination using rate is high.

The invention discloses a multi-rotor unmanned aerial vehicle and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises a body, arms, motors, rotors, scaffolds and the like and is characterized in that a hanging bracket is further arranged on the body and comprises a hook, a main rod, a base and connectors, wherein the hook is connected to the upper end of the main rod, the base is connected to the lower end of the main rod, and the connectors used for being clamped to the arms are arranged on the base. In the use process, the multi-rotor unmanned aerial vehicle can be hung on an object in a high position through the hook on the unmanned aerial vehicle. The multi-rotor unmanned aerial vehicle in the hanging state doesn't need power for supplying lift force, most of battery power can be supplied to carried equipment for use, and accordingly, the working time of the working equipment in a take-off and landing process can be prolonged greatly. The multi-rotor unmanned aerial vehicle can be widely applied to the field of fixed point monitoring in the air, surveillance, shooting, environmental monitoring, field scientific investigation, case reconnaissance, city management, courtyard security and protection, vehicle guard, express transportation and the like.

The invention discloses a mining material conveyor belt. The mining material conveyor belt comprises a conveyor belt body, infrared sensing devices, baffles, grooves, a controller, a motor, supportingplates, a power roller and supporting rods. The baffles are welded to the supporting rods. The supporting rods are in tenon-and-mortise connection with the corresponding grooves. The baffles are welded to the corresponding grooves. The baffles are arranged on the two sides of the conveyor belt body in parallel. The infrared sensing devices are arranged between the two baffles. The infrared sensing devices are 5-15 cm away from the plane of the conveyor belt body. The power roller is coaxially connected with the motor. The supporting plates are tangent to the upper edge of the power roller andare arranged below the conveyor belt body. The baffles are additionally arranged on the two sides of the conveyor belt body to prevent dust formed with wind and air pollution in the process of conveying powder materials. When conveying blocky materials, the conveyor belt can prevent the materials from falling from the two sides and avoid difficult cleaning. The infrared sensing devices are arranged between the baffles. When the materials get blocked, the infrared sensing devices conduct sensing and give a warning, and the controller gives an instruction to stop the conveyor belt. The problemthat most of materials are blocked and are hard to clean is solved.

The invention discloses multifunctional pesticide spraying equipment capable of preventing wind. The multifunctional pesticide spraying equipment capable of preventing wind comprises a pesticide box,wherein a liquid suction pipe is inserted into the top of the pesticide box; a liquid suction pump is arranged on the bottom of the liquid suction pipe; the top of the liquid suction pump is fixedly connected with a middle shaft; the side face of the middle shaft is engaged with an engaging rod; the side face of the engaging rod is in sliding connection with a power wheel; a centrifugal wheel is arranged on the left side of a baffle plate; a centrifugal rod is inserted into the side face of the centrifugal wheel; the top of the centrifugal wheel is fixedly connected with a linkage shaft; the top of the linkage shaft is fixedly connected with a wind measuring fan; the inner wall of the liquid suction pipe is fixedly connected with an air pressure box; and the inside of the air pressure boxis in sliding connection with an air pushing plate. According to the multifunctional pesticide spraying equipment capable of preventing wind, the middle shaft and the linkage shaft are used cooperatively, so that the effects of automatically adjusting pesticide spraying strength according to wind power and reducing the influences, caused by the wind power, on pesticide spraying are achieved when pesticides are sprayed.

The invention discloses a multi-rotor unmanned plane, and belongs to the technical field of an unmanned plane. The multi-rotor unmanned plane comprises a plane body, a plane arm, a motor, a rotor wing, and a foot stool; one end of the plane arm is connected to the plane body, and the motor is installed on the plane arm; the rotor wing is connected to a rotary shaft of the motor, and the foot stool is arranged beneath the plane body; besides, a cross suspending frame is further arranged on the plane body, the outer end of the suspending frame is provided with a magnet and a bracket; the bracket is located beneath the magnet. The multi-rotor unmanned plane can be absorbed on an iron advertising board, a traffic signboard, a light pole, an outdoor air conditioning unit and other high objects through the magnet on the suspending frame. After absorbing on the high object, the lifting force of the multi-rotor unmanned machine in a hanging state is not provided by power energy of the battery, and the working devices on the multi-rotor unmanned plane can be worked or standby at the high place for a long time. The multi-rotor unmanned plane can be widely applied to overhead monitoring at a fixed point, monitoring, live telecast, environmental protection monitoring, case detection, urban administration, courtyard safeguard, vehicle anti-theft, and other domains.

The invention provides a multi-rotor unmanned aerial vehicle and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises a fuselage, fuselage arms, motors and rotors. One end of each fuselage arm is connected with the fuselage. The motors are installed on the fuselage arms. The rotors are installed on rotating shafts of the motors. In addition, hanging frames are further arranged on the side surface of the fuselage or on foot frames under the fuselage. Hanging rods are arranged on the upper portions of the hanging frames, supporting feet are arranged on the lower portions of the hanging frames, when the hanging frames are looked up, the supporting feet are on the inside, and the hanging rods are on the outside. The multi-rotor unmanned aerial vehicle can be hung on street lamp poles and other pole-shaped objects to work through the hanging rods and the supporting feet on the hanging frames, the lifting force does not need to be provided by the rotors for the multi-rotor unmanned aerial vehicle in a hung state, and the working time of airborne equipment in the high positions can be greatly prolonged; and in addition, in the hung state, the attitude and the position of the multi-rotor unmanned aerial vehicle are very stable, and additional control is not needed. The multi-rotor unmanned aerial vehicle can be widely applied in the fields of aerial fixed-point shooting, monitoring, live broadcasting, environmental protection monitoring, case reconnoitering, city management, courtyard security and protection, vehicle theft prevention and the like.

The invention discloses a multi-rotor unmanned plane, which comprises a plane body, a plane arm, a motor, a rotor wing, a rotor protecting frame, and a foot stool; the plane arm is connected to the plane body, and the motor is installed on the plane arm; the rotor wing is connected to a rotary shaft of the motor, and the rotor protecting frame is arranged at the periphery of the rotor wing; the foot stool is arranged beneath the plane body. Besides, a suspending rope is further arranged on the multi-rotor unmanned plane; the front end of the suspending rope is connected to the plane body, and the plane arm or the rotor protecting frame; the tail end thereof is connected with a suspending hook. When the multi-rotor unmanned plane is under a hovering state, the suspending hook is hung under the multi-rotor unmanned plane. The multi-rotor unmanned plane is hung on an object at a high place through the suspending rope and the suspending hook. After hanging on the object at high place, the working devices on the multi-rotor unmanned plane can work or be standby at the high place for a long time. The multi-rotor unmanned plane can be widely applied to overhead monitoring at a fixed point, monitoring, shooting, environmental protection monitoring, urban administration, courtyard safeguard, vehicle anti-theft, animal scientific research, and other domains.

The invention relates to a dot-jet type seed metering method. The method comprises the following steps: S1, calibrating parameters: calibrating and storing dot-jet type seed metering control parameters; S2, vibrating and queuing to discharge seeds: filling seeds into a conical cylinder through a seed adding port, controlling the conical cylinder to vibrate, enabling the seeds to flow under the action of vibration, and discharging and falling from a seed discharging head; S3, friction acceleration: enabling two sides of the fallen seeds to generate friction force in the same direction as a preset ejection direction, so that the seeds are discharged at a high speed at an acceleration corresponding to the friction force; and S4, direction adjustment: guiding the direction of the seeds discharged at a high speed, so that the seeds are accurately shot to a target position. According to the method, seeds can be discharged at a high speed, the influence of an environment wind field is reduced, the unmanned aerial vehicle can still achieve accurate seeding while keeping a high flight height, meanwhile, arching and blocking of the seeds in the seed discharging process can be avoided, the seeds are queued at a high speed, the seeding efficiency is improved, and the method can be used for seeding operation and seeding operation. And the device can also be used for single-particle rapid discharging operation of other particle materials. The invention also relates to a dot-jet type seed metering device.