36results about How to "Avoid wind resistance" patented technology

The present invention discloses a communication antenna automatic orientation apparatus and method, wherein the apparatus comprises: a target base station geographical storage for storing the corresponding relation between the spatial location information on the air lane and the identifier of a target base station; a sensor for confirming current spatial location information of the aircraft; an aircraft spatial orientation sensor for confirming a current spatial orientation of the aircraft; a master controller for confirming a target direction of a directional antenna according to the current spatial location information, the corresponding relation and the current spatial orientation and sending an instruction carrying the target direction; an automatic antenna directional system for receiving the instruction and driving the directional antenna according to the target direction so as to enable the directional antenna to receive a signal from a ground base station in the target direction; a wide aperture antenna for receiving the signal from the ground base station in omni-direction; and a mobile communication terminal for processing the signal received by the wide aperture antenna and the signal received by the directional antenna.

The invention relates to a lifting type anti-toppling large portal type display frame. The display frame comprises a support, a publicity page, a rotating shaft, a counterweight rod and a winding device, wherein the rotating shaft is detachably arranged at the top of the frame column of the support in a penetrating manner and is rotationally connected with a frame, the winding device is arranged at the end part of the rotating shaft protruding out of the frame column, and the counterweight rod is clamped in the groove of the support; the winding device comprises a worm wheel, a worm, a drivingshaft and fan blades, wherein the worm wheel is fixedly connected with the end part of the rotating shaft, the worm is meshed with the worm wheel, two ends of the worm are rotatably connected with lugs on the side wall of the frame column, a functional hole is formed in the worm, the driving shaft penetrates through the functional hole, and two ends of the driving shaft are respectively connectedwith two fan blades with opposite rotating directions. The lifting type anti-toppling large portal type display frame can automatically roll up the publicity page when strong wind comes, eliminates the wind resistance of the publicity page caused by wind blowing, ensures the safety and stability of the display frame for publicity, and the lifting type anti-toppling large portal type display frameis suitable for roof advertisement and outdoor large-scale standing advertisement.

The invention relates to a method and device for controlling an unmanned aerial vehicle based on a vehicle and the vehicle, the unmanned aerial vehicle is in communication connection with the vehicle,a storage device used for storing the unmanned aerial vehicle is arranged in the vehicle. The method comprises the steps that a trigger instruction used for controlling the unmanned aerial vehicle isreceived; the storage device is moved out of the vehicle; the storage device is started; and the unmanned aerial vehicle is controlled to take off from the storage device or land on the storage device. The unmanned aerial vehicle can be stored in the storage device in the vehicle, and wind resistance caused when the unmanned aerial vehicle is parked at the top of the vehicle is avoided. And the whole process is automatically carried out, and the unmanned aerial vehicle does not need to be manually controlled to take off or land through a terminal, so that the unmanned aerial vehicle can be safely released to execute a specific task under the conditions that only one driver is in the vehicle and the vehicle is in a running state.

The invention relates to a lifting type anti-toppling large portal type display frame. The display frame comprises a support, a publicity page, a rotating shaft, a counterweight rod and a winding device, wherein the rotating shaft is detachably arranged at the top of the frame column of the support in a penetrating manner and is rotationally connected with a frame, the winding device is arranged at the end part of the rotating shaft protruding out of the frame column, and the counterweight rod is clamped in the groove of the support; the winding device comprises a worm wheel, a worm, a drivingshaft and fan blades, wherein the worm wheel is fixedly connected with the end part of the rotating shaft, the worm is meshed with the worm wheel, two ends of the worm are rotatably connected with lugs on the side wall of the frame column, a functional hole is formed in the worm, the driving shaft penetrates through the functional hole, and two ends of the driving shaft are respectively connectedwith two fan blades with opposite rotating directions. The lifting type anti-toppling large portal type display frame can automatically roll up the publicity page when strong wind comes, eliminates the wind resistance of the publicity page caused by wind blowing, ensures the safety and stability of the display frame for publicity, and the lifting type anti-toppling large portal type display frameis suitable for roof advertisement and outdoor large-scale standing advertisement.

The invention belongs to the field of flight products, and specifically discloses an aircraft with retractable rotors, which includes an aircraft body, rotors and a jet engine, the jet engine is installed at the tail of the aircraft body, and the rotors are rotatably installed on On both sides of the aircraft body, the rotor includes a rotor shaft, rotor blades and a base, the base includes a fixed seat and a rotating part, the rotating part is movably connected with the fixed seat, and the rotor blade is connected to the rotating part through a rotary pin Connect; Simultaneously the invention also discloses the flight mode of this aircraft. The rotor of the aircraft disclosed by the invention can be rotated to be parallel or perpendicular to the horizontal plane during flight, and the blades of the rotor can be expanded and retracted, which not only retains the vertical take-off and landing and hovering capabilities of ordinary tilting aircraft, but also overcomes the need The wind resistance generated by the rotor blades during the process increases the flight speed of the aircraft.

The invention discloses a cooling system of a variable frequency generator. The cooling system comprises an engine case, a generator, a generator shell, a fan blade, a generator rear cover, an insulation board, an inversion controller and a generator crankshaft, wherein the generator comprises a generator rotor and a generator stator; the generator rotor is arranged on the generator crankshaft; the generator shell is fixed on the generator case; the generator stator is fixed on the generator shell and is positioned in the generator rotor; the fan blade is positioned between the generator rotor and the generator rear shell; and the inversion controller and the insulation board are positioned on two sides of the generator shell respectively. The fan blade rotates to generate strong wind pressure, and cold air is sucked, and is discharged from an air outlet of the generator shell after fully cooling the generator stator and the generator rotor, so that the inversion controller, the generator case and the insulation board are compulsively cooled.