31results about How to "Take off and land smoothly" patented technology

The invention relates to an unmanned aerial vehicle take-off and landing platform which comprises a box body composed of a bottom plate, side plates and a top plate; the bottom plate and the side plates are hinged; the side plates are fixedly connected through buckles, and the side plates and the top plate are fixedly connected through buckles; a plurality of third springs are evenly distributed on the bottom plate, a supporting plate is fixed to the top ends of the third springs, a plurality of supporting rods are hinged to the side wall of the supporting plate, free ends of the supporting rods are connected with the bottom plate in a sliding mode, and the top face of the supporting plate is used for parking an unmanned aerial vehicle. Protection devices are arranged on the side plates. According to the unmanned aerial vehicle, the springs are arranged on the bottom plate and the side plates, so that a damping device can be formed, acting force caused by bumping and vibration can be offset in the transportation process, and safe transportation of the unmanned aerial vehicle is guaranteed.

The invention discloses a construction frame structure for aerial work and relates to the technical field of building engineering. The construction frame structure comprises a track column, a movable sleeve, a transverse supporting rod, an inclined supporting rod, a construction platform and a lifting mechanism. The single track column is adopted as a supporting piece to support a construction operation area, that is, the transverse supporting rod and the construction platform; the structure of a construction frame is simplified, and the transverse supporting rod can move up and down under driving of the lifting mechanism, so that the flexibility of operation is improved; and meanwhile the construction platform can also transversely rotate, the construction frame structure is suitable for construction operation of two mutually-perpendicular wall surfaces, the operation area is widened, the overall structure is simple, and operating is convenient and quick.

The invention provides a rotor-type unmanned aerial vehicle automatically adjusting a gravity center after loading and an adjustment method. The rotor-type unmanned aerial vehicle includes a machine body provided with a rotor assembly, the bottom of the machine body is provided with a testing device for supporting the machine body to test the weight and the gravity center of the machine body and a translational mechanism connected with the machine body; the translational mechanism comprises a mobile output end for fixing a load. According to the rotor-type unmanned aerial vehicle automatically adjusting the gravity center and the adjustment method, a gravity center position of the unmanned aerial vehicle is controlled through installation of the testing device and the translational mechanism on the machine body, so that the unmanned aerial vehicle can perform smooth taking-off and landing and safe landing, and the security of the unmanned aerial vehicle is improved; and the adjustment method is simple in process, enables detection and adjustment to be carried out from time to time, and is applicable to a working condition that requires to frequently modify the machine body.

The invention discloses A landing gear for a snowy aircraft, relating to technical field relate to aircraft landing gears. The gear, include an airframe, the lower surface of the machine body is provided with a through hole, and the lower surface of the inner wall of the machine body is fixedly connected with a fixing rod, the right end of the fixing rod is fixedly connected with a driving device,The driving device is meshed with the second gear, and the driving device is positioned in the through hole. The inner wall of the second gear is fixedly connected with the rotating device. The rotating device is clamped on the inner wall of the U-shaped plate, and the lower surface of the rotating device is fixedly connected with the top end of the load-bearing pillar. The left side surface of the U-shaped plate is fixedly connected with the right side surface of the support plate. The landing gear for the snowy aircraft is provided with an electric motor, a first gear, a second gear, a bearing, a rotating shaft, a support column, a sleigh and a crawler, thereby realizing the smooth take-off and landing of the aircraft, avoiding the occurrence of skid and tire depression when the aircraft takes off and landing on the snowy ground, increasing the stability of the aircraft and reducing the discomfort of passengers.

The invention discloses a concrete abrasion resistance test system which comprises a concrete abrasion mechanism, a machine frame and a water inlet mechanism. The machine frame comprises an outer fixed machine frame body and an inner movable machine frame body. The concrete abrasion mechanism comprises a stirring motor and a cylinder. The cylinder comprises an outer cylinder body and an inner cylinder body. The water inlet mechanism comprises a water inlet pipe, a first hose and a first valve. A cylinder cover is arranged on the top of the inner cylinder body, and comprises two semicircular covers. Semicircular holes are correspondingly formed in the centers of the two semicircular covers and combined into a circular hole. A transparent inspection window is formed in the side wall of the outer cylinder body. The left side and the right side of the top of the outer fixed machine frame body are downwards connected with a first electric push rod and a second electric push rod respectively. The lower portion of the rear end of the outer fixed machine frame body is fixedly connected with a third electric push rod. The invention further discloses a concrete abrasion resistance test method using the concrete abrasion resistance test system. The test efficiency is improved, labor intensity is reduced, remote monitoring and control can be achieved, and good application and popularization value is achieved.

The invention belongs to the technical field of information processing and control, and discloses a method and system for automatic landing and charging of a miniature quadrotor. The method for automatic landing and charging of a miniature quadrotor includes: early warning of electric power of a miniature quadrotor , use GPS to locate the micro quadrotor and fly directly above the ground relay station; the camera shoots the micro quadrotor, performs background difference, locates, captures, and tracks the micro quadrotor; combined with the differential GPS information sent back from the micro quadrotor and the ground, Read the height of the micro-quadrotor, perform 3D positioning, and guide the micro-quadrotor to land autonomously. The invention can automatically control the take-off and landing of the miniature quadrotor, which saves manpower. At the same time, the opening and closing device and the frame can ensure that the miniature quadrotor will not be damaged in special weather. The takeoff and landing of the existing domestic drones are mostly completed on the ground. , there is no fixed liftable opening and closing structure to ensure the preservation and smooth take-off of the drone.

A double-duct UAV with double-motor horizontal cloth cooperative control, including double-duct, double-motor, and rudder surface components. Propellers on both sides, where the planes of the propeller rotation axes on both sides are parallel to but not coplanar with the plane where the dual motors are located; the rudder surface component is located under the duct, and the rudder surface is pushed and deflected by the rocker rod structure to control the attitude and direction of the drone , through the ESC to control the motor speed, adjust the lift force and roll attitude of the UAV, the ESC and the steering gear act synchronously, increase the power output of the dual motors, unify the speed, and make the dual motors correspond to them during the vertical take-off and landing of the UAV The synchronous belt, synchronous wheel, duct and rudder surface components work together to achieve stable take-off and landing and high-speed level sailing. The invention has a triangular symmetrical layout, good structure rigidity, high space utilization rate, double motors are placed horizontally and centrally, synchronous belts are used to cooperate to transmit power to the propeller, and the dual powers have a unified speed to increase the lift force and ensure the take-off and landing process of the drone. The take-off and landing process is stable. At the same time, there is a set of linkage rudder surfaces under the propeller duct on each side, which cooperate with the ESC to realize the pitch, yaw, and roll motion control of the whole machine.

The invention discloses a plant protection unmanned aerial vehicle, relates to the technical field of agricultural equipment, and solves the problems that most of existing plant protection unmanned aerial vehicles are subjected to ground contact nail insertion by means of pure insertion cones, the surfaces of the insertion cones are smooth, the road holding force is poor, and the unmanned aerial vehicles are extremely likely to rebound, vibrate and tip over when making contact with the ground. A plant protection unmanned aerial vehicle comprises a vehicle body, a round water tank is hoisted at the bottom of the vehicle body, an L-shaped water injection pipe is supported and communicated to the top end section of the circumferential outer wall of the water tank, and four protruding positioning plates are symmetrically welded to the bottom of the circumferential outer wall of the water tank; two vertical supporting brackets are inserted into the four protruding positioning plates through pushing of springs in a penetrating manner; and each of the two vertical supporting brackets is formed by welding a left L-shaped supporting rod and a right L-shaped supporting rod together. Under the downward sliding impact of the top inserting rod, the inserting needles in the four vertical supporting sliding rods can protrude and be inserted into the soil in a jacking mode, the road holding force of the four ground inserting conical rods is enhanced, and the unmanned aerial vehicle is more stably inserted into the soil surface.

The invention provides a double-duct tilt aircraft. The double-duct tilt aircraft comprises duct rotor seats, a machine body, duct rotors, flaps, driven synchronous pulleys, synchronous belts, a driving synchronous pulley, an undercarriage, a turbine, a main wing, a storage battery set, a cockpit, an electronic operating device, a hydraulic power unit, a servo motor, a worm, a worm support, driven bevel gears, driving bevel gear shafts, a kerosene reciprocating engine, first cranks, first hydraulic cylinders, second hydraulic cylinders and second cranks. The flying speed and posture of the double-duct tilt aircraft are controlled by the duct rotors, the flaps and the main wing jointly, so that the double-duct tilt aircraft has the characteristics of being large in lift force, smooth and steady in taking off and landing and high in air flying speed. The cockpit is arranged on utmost upper portion of the double-duct tilt aircraft, so that a pilot has a good sight range, and the operation of the double-duct tilt aircraft is greatly facilitated. The main wing can be driven by the servo motor to rotate by 90 degrees and keep parallel to the machine body when parked, so that space is saved, and traffic jam in a city is eased.

The invention belongs to the technical field of unmanned aerial vehicle auxiliary equipment, and particularly discloses a multi-unmanned-aerial-vehicle landing device based on a manipulator-assisted and parallel four-bar mechanism for an unmanned surface vehicle platform. The multi-unmanned-aerial-vehicle landing device includes an unmanned surface vehicle which is provided with multi-layer rotating platforms, an unmanned aerial vehicle fixing device is arranged on every layer of platform of the multi-layer rotating platforms, the unmanned aerial vehicle fixing devices are provided with the unmanned aerial vehicles; and a ship-borne manipulator system matched with the multi-layer rotating platforms is further arranged on the unmanned surface vehicle, and a control system is arranged on the unmanned surface vehicle. Through the multi-layer rotating platforms on the unmanned surface vehicle, multiple unmanned aerial vehicles can be taken off and landed; the unmanned aerial vehicle fixing devices can stably fix the unmanned aerial vehicles staying on the multi-layer rotating platforms, and can charge the unmanned aerial vehicles when the unmanned aerial vehicle power is insufficient; the unmanned aerial vehicles are matched with and the unmanned aerial vehicle fixing devices, and the effect of enabling the unmanned aerial vehicles to take off and land quickly and smoothly on the unmanned surface vehicle is achieved; and the ship-borne manipulator system and the unmanned aerial vehicles are cooperated to play a role of assisting the unmanned aerial vehicles to land and take-off.

The invention belongs to the technical field of unmanned aerial vehicle auxiliary equipment, and particularly discloses a self-stabilized multi-unmanned aerial vehicle landing device based on a parallel four-bar mechanism for an unmanned boat platform. The self-stabilized multi-unmanned aerial vehicle landing device comprises an unmanned boat, a six-degree-of-freedom parallel platform is arranged on the unmanned boat, a multi-layer rotating platform matched with the six-degree-of-freedom parallel platform is arranged on the six-degree-of-freedom parallel platform, unmanned aerial vehicle fixing devices are correspondingly arranged on any platform of the multi-layer rotating platform, and unmanned aerial vehicles are arranged on the unmanned aerial vehicle fixing devices. According to the self-stabilized multi-unmanned aerial vehicle landing device, through matching of the six-degree-of-freedom parallel platform and the multi-layer rotating platform on the unmanned boat, the multi-layer rotating platform can be ensured to be always in a horizontal state, a plurality of unmanned aerial vehicles can be stared and stopped, then the unmanned aerial vehicles and the unmanned aerial vehicle fixing devices are matched, the action of quickly and smoothly taking off and landing on of the unmanned aerial vehicles on the unmanned boat is achieved, and unmanned aerial vehicle landing gears on the unmanned aerial vehicles play a role of increasing of unmanned aerial vehicles fixing.