Abstract: A method for filtering in ranging of a UAV is provided, which is based on a characteristic that velocities of the UAV change continuously during a moving process. A current velocity of the UAV is obtained via seeking difference of distances measured by the sensor, then a variance of continuous velocities is calculated and it is determined whether a current distance is valid according to the variance. The general process of the method is as follows. First, initial distances measured by the sonar sensor are acquired, secondly, it is determined whether a new distance is valid according to the initial distances, if the new distance satisfies a curtain condition, the new distance is considered to be valid and the initial distances are updated; if the new distance does not satisfy the curtain condition, a distance is estimated and used as the current distance and the initial distances are maintained.

Abstract: A liquid volume transfer system includes: a liquid infusion device, including a first communication module, a first controller and a first flow rate detecting module; a liquid container, including a second communication module; and an unmanned aerial vehicle, including a third communication module, a third controller and a second flow rate detecting module.

Abstract: A rotorcraft and an automatic landing system and method thereof are provided in the present disclosure. The automatic landing system of the rotorcraft includes a controller, a laser emitter, a camera, an electronic governor and a motor configured to drive a propeller of the rotorcraft to rotate. The laser emitter and the camera are both locate in a bottom portion of an airframe of the rotorcraft. The laser emitter has two emission heads, laser beams emitted from the two emission heads respectively are symmetrical about a central axis, the central axis is perpendicular to a horizontal plane of a ground, and an angle between each laser beam and the central axis is an acute angle. Simply with an operation of the laser emitter, the camera and the controller, the flight speed and displacement of the rotorcraft can be controlled to realize automatic landing in the present disclosure.

Abstract: The present disclosure relates to a scheduling method and system for an unmanned aerial vehicle, an unmanned aerial vehicle, and a server for scheduling an unmanned aerial vehicle. The method comprises the following steps: obtaining identity feature data of an unmanned aerial vehicle, and sending the identity feature data to a server; receiving a task instruction sent by the server and matching the identity feature data, wherein the task instruction is generated by the server according to a preset task datasheet; performing a corresponding task according to the task instruction. The above scheduling method and system for the unmanned aerial vehicle, the unmanned aerial vehicle, the server for scheduling the unmanned aerial vehicle can achieve large-scale dispatching of unmanned aerial vehicles and facilitate the use of the unmanned aerial vehicle for people.

Abstract: A method and an apparatus for obtaining a range image, and a UAV are provided. The method includes: reading an image sequence of a predetermined scene, in which the Nth image and the (N+1)th image of the image sequence have an overlapping region; obtaining a pixel movement velocity of each pixel point in the overlapped region in a camera coordinate system of the UAV; obtaining an actual flying velocity of the UAV in a world coordinate system; obtaining a range image of each overlapped region according to the pixel movement velocity of each pixel point in the overlapped region in the camera coordinate system of the UAV, the actual flying velocity of the UAV in the word coordinate system, and parameters of the airborne camera, and obtaining a range image of the preset scene through integrating the range image of each overlapped region.

Abstract: A method and device for receiving the article and a method and system for delivering article are provided in the disclosure. The device for receiving the article (200) includes: a box body (10); a door (20), arranged on the box body (10); and a wireless communication module, configured to perform unlocking matching with an aircraft (100), control the door (20) to be in an open state after unlocking matching succeeds, and send a delivery instruction to the aircraft (100). The technical problem where an article cannot be automatically unloaded after being delivered to a destination is solved.

Abstract: The embodiments of the disclosure discloses an aircraft spraying control device, a method thereof, and a spraying system, relating to the technical field of agricultural plant protection. The aircraft spraying control device comprises a micro-controller, a pump motor, and a nozzle motor; the micro-controller acquires the flight information of the aircraft and the preset pesticide spraying information of the aircraft, and acquires the target rotational speed n of the pump motor according to the flight information of the aircraft, the preset pesticide spraying information of the aircraft, and the pesticide discharging amount K per rotation of the pump motor so as to control the pump motor to rotate at the target rotational speed n of the pump motor so that the pump supplies pesticide to a nozzle. The micro-controller also controls the nozzle to spray.