2results about How to "Small frontal area" patented technology

The application discloses a longitudinally foldable water-air dual-purpose propeller, and belongs to the technical field of cross-medium aircraft propulsion, comprising a new-configuration hub, a longitudinal folding mechanism, a limiting structure and a down-bending propeller blade with a preset down-bending angle; the configuration of the propeller enables the down-bending propeller blade to be completely unfolded to form a first working configuration through centrifugal force in air, and the down-bending propeller blade to be passively folded and limited to form a second working configuration through hydrodynamic lift in water; the longitudinally foldable water-air dual-purpose propeller can automatically complete mode switching according to the difference between working media without any active control mechanism, and can maintain high efficient propulsion performance in both media.

The invention relates to the technical field of underwater intelligent robots, in particular to an ocean structure cleaning robot based on a bionic octopus and a control method, and the ocean structure cleaning robot comprises a head variable fairing system, a mechanical arm telescopic adsorption system, a mechanical arm telescopic cleaning system, a head electromagnetic adsorption track mechanism and a bionic octopus mechanism; the head variable fairing system is fixed to a head vector control cabin shell of the bionic octopus mechanism through a rigid connecting piece, the mechanical arm telescopic adsorption system is connected to an upper body of the bionic octopus mechanism through a universal spherical hinge, and a lower body of the bionic octopus mechanism is connected with the mechanical arm telescopic cleaning system. The problems that a traditional single adsorption mode is poor in adaptability to materials, and complex curved surfaces are not tightly attached are solved, it is guaranteed that the robot is stably attached to the surface of a vertical or inclined or high-curvature structure, and the falling risk in the operation process is avoided.