106results about How to "Extended air time" patented technology

The invention discloses an air-ground combined agricultural spraying device and application of the air-ground combined agricultural spraying device. The air-ground combined agricultural spraying device comprises an aircraft, connecting pipelines, a winch mechanism, a winch mechanism supporting rod, a power system, a liquid pesticide storage tank, a transport vehicle, a pressure pump, an inner passage, a propeller, a propeller beam, a propeller drive motor, an aircraft bracket and spray heads. According to the air-ground combined agricultural spraying device, the large-size heavy liquid pesticide tank, the pressure pump and the power system are installed on the transport vehicle, a spraying mechanism is installed on the small unmanned rotorcraft, and an air device and a ground device are connected through hoses and wires. In this way, aerial spraying in a limited area within ultra-long auto-hover time is achieved, and meanwhile long-distance ground transportation of an aircraft is achieved.

The invention discloses a bionic flapping-wing machine with double-section main wings. The bionic flapping-wing machine comprises a driving mechanism, a main bracket, a tail-wing mechanism, a double-section flapping-wing mechanism and two steering machines, wherein the driving mechanism is connected with the front end of the main bracket; the tail-wing mechanism is connected with the rear end of the main bracket; the double-section flapping-wing mechanism is connected to the driving mechanism; the two steering machines are arranged on the main bracket. The bionic flapping-wing machine disclosed by the invention has the following beneficial effects that the structure is simple and compact, the flapping-wing movement with complete symmetry can be realized, the flapping-wing machine can fly like a bird by adopting the double-section flapping-wing mechanism, due to the foldable wings, the resistance of the wings can be small in upwards flapping and the wingspan area can be the largest in downwards flapping, so that large lifting force is generated, and the flying speed and the hang time are increased. In addition, a spherical pair is adopted for connection with the tail-wing mechanism, the direction control of the flapping-wing machine is sensitive and the flapping-wing machine can imitate the flying of the bird. Furthermore, the bionic flapping-wing machine can be applied to the fields of bird repelling of an airport, monitoring, intelligence gathering, disaster rescuing and searching and the like.

An airplane able to change the shape of wing is composed of an airplane body and two wings consisting of fixed wing with one end fixed to airplane body, slide wing installed in the skeleton of said fixed wing and with a roller moving in a spiral slot on a cylindrical body, and the cylindrical body and shape memory alloy bar, which are fixed to each other and installed in the skeleton of said fixed wing. Said shape memory alloy bar is used as the drive source for changing wing shape.

The invention discloses a UAV system and a control method thereof. The UAV system is used to execute a task within a task area, and the task area is divided into subareas; the system comprises UAVs, ground stations and a control platform, the ground stations are in one-to-one correspondence with the subareas, and the ground stations are in communication connection with the UAVs in one to one correspondence; and the ground stations obtain an execution instruction from the control platform, and the ground station which obtains the execution instruction controls the corresponding UAV to execute the task in the corresponding subarea according to the execution instruction. The single UAV includes the bandwidth with the corresponding ground station independently, transmission of large data amount can be satisfied fully, flight subareas of the UAVs are relatively small, and hang time is longer; and a UAV task can be realized in a wider task area as wide-area monitoring in a better way.

The invention discloses a bag body telescopic stratospheric airship. In order to enable an airship to lift up into a stratosphere, a telescopic inner air bag, a telescopic outer air bag, and a principle that the pressure between the inner air bag and the outer air bag is balanced are adopted; when the airship flies into the stratosphere from the ground, the telescopic inner air bag and the telescopic outer air bag can be expanded to required volumes along with the continuous reduction of external ambient pressure; when the airship returns to the ground from the stratosphere, the telescopic inner air bag and the telescopic outer air bag can be reduced to the original volumes along with the continuous increase of the external ambient pressure, so that the appearance and the safety of the airship can be guaranteed; meanwhile, the hang time of the airship is prolonged by times.

The invention provides a bag skin material and an aerostat. The bag skin material comprises a weather-proof layer, an air-blocking layer, a weight-bearing layer and a welding layer which are overlapped, wherein the air-blocking layer is organic polymer with montmorillonite dispersed. The montmorillonite is dispersed in the organic polymer to form the air-blocking layer. Due to the property that the montmorillonite is layered crystalline silicate clay ore, the air-blocking performance of the bag skin material is improved. Furthermore, leakage of air inside the aerostat or an airship is reduced, and the hang time of the aerostat or the airship is lengthened.

The invention provides a tail-sitter vertical take-off and landing unmanned aerial vehicle. The unmanned aerial vehicle comprises a fuselage (1), wings (2), tail wings (3), motors (4) and propellers (5), wherein the wings (2) and the tail wings (3) are disposed on the outer surface of the fuselage (1); the wings (2) are disposed in a lower dihedral manner, and the tail wings (3) are disposed in anupper dihedral manner; flight modes of the unmanned aerial vehicle comprise a vertical flight mode, a vertical-to-level transition mode, a level flight mode and a level-to-vertical transition mode, and the unmanned aerial vehicle combines both flight characteristics of a rotary-wing unmanned aerial vehicle and a fixed-wing unmanned aerial vehicle, so that an area for takeoff and landing is reduced. The speed in the level flight mode is high. The unmanned aerial vehicle has the characteristics of vertical take-off and landing, can be deployed in various restricted environments such as mountainous and hilly lands and narrow urban streets, and has a horizontal high-speed cruising function, so that the hang time is increased and the navigation is expanded. The invention also provides a control system and a control method of the tail-sitter vertical take-off and landing unmanned aerial vehicle.

An auxiliary propeller folding mechanism of a model airplane glider comprises a steering engine and an auxiliary propeller, wherein the steering engine comprises an oscillating arm, the auxiliary propeller is connected with an output shaft of a power element, the power element is connected with a machine body through a parallel four-connection-bar mechanism, the steering engine is fixed in the machine body, and the oscillating arm is connected with any one connection bar in the parallel four-connection-bar mechanism. A position sensor is arranged at the tail end of the stroke of the power element, the first connection bar or the second connection bar and is connected with the control end of a controller or the steering engine through a signal line. The steering engine drives the parallel four-connection-bar mechanism, and the auxiliary propeller and the power element can contract in the machine body or protrude out of the machine body. In the powerless gliding flight process, the auxiliary propeller and the power element contract in the machine body, and accordingly the aerodynamic performance of the machine body can be remarkably improved, resistance can be reduced and the glider hang time can be prolonged.

The invention relates to an aircraft for automatically monitoring the atmospheric environment and a monitoring method. The aircraft comprises a drone carrying platform and an atmosphere sampler and ischaracterized in that the drone carrying platform comprises an electric drive system, a gas bag stabilizing system and a power control system, a battery provides driving force for the electric drivesystem so as to drive the drone carrying platform to move vertically and horizontally, and the gas bag stabilizing system comprises a helium bag which is mounted on the drone carrying platform and used for providing floating force for the drone carrying platform when a drone is in the air. The aircraft has the advantages that the hang time of the drone carrying platform is increased, atmosphere pollution conditions can be synchronously collected during flight or hanging, and sampling time is shortened under the premise that detection indexes are diversified and data is stable; the aircraft isdiversified in control manner and can work under different weather conditions.

A nacelle for a wind turbine includes an electrical generator having a stator and a rotor with an air gap between the stator and the rotor. The stator includes an annular support plate. A cooling circuit in the nacelle includes at least a first inlet portion for channeling a fluid cooling medium to the gap between the stator and the rotor. The first inlet portion of the cooling circuit includes at least an inlet hole on the annular support plate for letting at least a portion of the cooling medium flow towards the air gap and an inlet fan for making the fluid cooling medium flow in the inlet portion. The stator includes a circumferentially outer structure attached to the annular support plate and the cooling circuit includes at least a second outlet portion for channeling a heated fluid medium from the air gap between the stator and the rotor.

The invention discloses a small constant-tension power supply system for an unmanned aerial vehicle. The system includes a power supply subsystem, a reel and release subsystem, a detection subsystem and a drive subsystem. The power supply subsystem includes a sliding ring and a power supply cable, one end of the power supply cable is connected with a ground power station through the sliding ring,and the other end of the system winds an outer roller and is connected with the unmanned aerial vehicle for supply power to the unmanned aerial vehicle after lead-out; the reel and release subsystem includes an inner roller, the outer roller and a torsion spring installed between the inner roller and the outer roller, cable reel and release can be achieved through rotation of the outer roller, thetorsion spring generates torque acting on the outer roller, and it is ensured that a power supply cable still keeps tension; the detection subsystem detects the angle difference between the inner roller and the outer roller, and a control signal is generated to drive a stepper motor to move. The system provides power for the unmanned aerial vehicle through a light power supply cable, and the functions of automatic reeling and releasing can be achieved according to the flying height and distance of the unmanned aerial vehicle, and the unmanned aerial vehicle can fly in air for a long time.

The invention discloses a solid rocket vehicle, and belongs to the field of recyclable rocket design. The solid rocket vehicle specifically comprises a head load compartment, a rocket body, wings, a rudder, horizontal tail rudders, an adjustable gas flow baffle, ad a tilt buffer; the head load compartment is in a lifting-body shape, the wings are located on both sides of the middle of the rocket body, and the horizontal tail rudders are located on both sides of the rear of the rocket body; and the rudder is located on the back of the rocket body, and the adjustable gas flow baffle is mounted on the rocket body and placed at the lower back portion of the outlet of an engine nozzle. The solid rocket vehicle comprehensively applies the lifting-body load compartment, the wing-level full-actingtail rudders and the landing buffer to increase the lifting force of a flight test platform, and the lift-block ratio and the delay time of the flight test platform are improved, so that the cruisingcapability of the flight test platform is improved; and the method of control rolling rotating of the differential horizontal tail rudders is used, the complexity of a control mechanism is simplified, the self-control of the drop point is achieved by using the cruising capability and the tilt strategies of the flight test platform, and landing recovery is easier.

The invention discloses a water curtain separation system for fire source separation. The system comprises a high-pressure atomization nozzle array; the high-pressure atomization nozzle array is formed by arranging high-pressure atomization nozzles according to the shape demand of a water curtain separator, and is used for atomizing a high-pressure water source to form a high-pressure fine water mist water curtain separator; and the high-pressure atomization nozzles are arranged in the low position of the formed water curtain separator, and are sprayed to form the water curtain separator in a vertical upward spraying mode. The system has the following beneficial effects: a scheme of spraying fine water mist in a necessary area to form a fine water mist separation wall is proposed; and the fire source isolation and fire propagation control problems in such special environments as tunnels at the time of occurring fire are solved. Further, a ground spraying fine water mist separation wall forming scheme for tunnel fire is proposed; and the scheme prolongs the hang time (longer than that of a top spraying fine water mist separation wall by one time) of sprayed fine water mists, and improves the heat insulation effect of the separation wall.

The invention relates to a harmful gas distribution and traceability detection method in an airspace range based on an unmanned aerial vehicle. An unmanned aerial vehicle system carrying a harmful gasrapid detection unit based on a tablet electrochemical sensor, a hovering height detection unit, a video image unit, a positioning unit and a wireless data transmission unit and a data receiving platform are used for carrying out harmful gas distribution and traceability detection in an airspace range; and harmful gas concentration data detected by the unmanned aerial vehicle at different positions and different heights are uploaded to the data receiving platform in real time, and on-site videos are transmitted in real time. Compared with a traditional ground station measurement mode, the measurement mode is improved from a plane to a three-dimensional mode, and the understanding of harmful gas distribution is greatly improved; by using the tablet electrochemical sensor, the weight of a detection device is greatly reduced, and the hang time of the unmanned aerial vehicle is favorably prolonged; and through construction of spatial vectors of harmful gas distribution, discovery and pre-judgment of harmful gas diffusion channels are greatly improved.