Abstract: The present disclosure provides a sample extraction device, which includes a plurality of chambers arranged on a pedestal. The chamber includes a plurality of first chambers and two mixing chambers. The pedestal is internally provided with a first passage for communicating the two mixing chambers, and a sample extraction chamber is arranged in the first passage. The pedestal is further internally provided with a second passage for transfer and export of a liquid, and connection or disconnection between the two mixing chambers and the second passage is controlled by a valve. Sample extraction processes of the above technical solutions are carried out in a fully enclosed device, avoiding contamination of samples and extraction reagents by external environments, and avoiding environmental contamination caused by aerosols generated during the sample extraction processes. The sample extraction device is particularly suitable for extraction of highly pathogenic samples.

Abstract: Provided are a high-plasticity dual-phase high-entropy alloy (HEA) and a preparation method thereof. The high-plasticity dual-phase HEA has a chemical formula as shown in Formula I: (FeCoNiCr)100-xTix (Formula I), in which, x is in a range of 2.0 to 2.8. A method for preparing the high-plasticity dual-phase HEA is also provided.

Abstract: A real-time ground fusion system is based on binocular stereo vision and an intelligent terminal. The method for accomplish real-time ground fusion includes: S1 of obtaining a disparity map about a same road scenario, and converting a disparity map in a target region into a 3D point cloud; S2 of performing pose conversion on a current frame and a next frame adjacent to the current frame, and performing inverse conversion on a 3D point cloud of the current frame; and S3 of repeating S2 with each frame in the target region as the current frame, so as to achieve ground fusion. Through the conversion and fusion of adjacent frames, holes caused by the projection of the disparity map can be filled to assist driving and output accurate height data, thereby improving comfortableness.

Abstract: Provided are a rotary shaft of a three-dimensional printing filament spool holder, a three-dimensional printing filament spool holder, and a three-dimensional printer, comprising a fixed tube and a sleeve assembly sleeved outside the fixed tube and being capable of rotating relative to the fixed tube. The sleeve assembly is elastically connected to the fixed tube through an elastic member, the relative rotation between the sleeve assembly and the fixed tube causes the elastic member to generate elastic deformation, and the sleeve assembly is configured for being sleeved in a three-dimensional printing filament spool.

Abstract: A photographing device includes a camera module assembly, a glass disposed external to the camera module assembly to protect the camera module assembly, a heating element disposed on the glass and a controller configured to control the heating element to heat the glass.

Abstract: A photographing device includes a camera module assembly, a glass disposed external to the camera module assembly to protect the camera module assembly, and a temperature sensor configured to detect an internal temperature of the photographing device. The photographing device also includes a heating element disposed on the glass. The photographing device further includes a controller configured to obtain the external temperature and to control the heating element to heat the glass when a difference between the internal temperature and the external temperature reaches a predetermined temperature.

Abstract: A method of operating a mobile platform includes determining a threshold angle relative to the mobile platform of an imaging device mounted to the mobile platform that avoids obstruction of a field-of-view of the imaging device by one or more components of the mobile platform, and controlling the mobile platform according to the threshold angle.

Abstract: A lens locking apparatus is configured to be coupled to a lens module. The lens module is configured to focus on an object by translating along an optical axis of the lens module. The lens locking apparatus is configured to fix a position of the lens module by applying a compressive force on the lens module when the lens module is at a focused position.

Abstract: An imaging device includes a housing, a carrier arranged within the housing, an optical assembly supported by the carrier within the housing, and a plurality of non-optical components arranged within the housing. The carrier includes one or more frame structures that are configured to rotate relative to the housing about two or more axes of rotation. The optical assembly includes a plurality of lenses and an image sensor, and the optical assembly is movable relative to the housing via the carrier about the two or more axes of rotation. The one or more frame structures are coupled to one or more motors and configured to actuate one or more of the plurality of lenses and the image sensor to move inside a limited movement space of the optical assembly.

Abstract: An imaging device includes a housing, a carrier arranged within the housing, an optical assembly supported by the carrier within the housing, and a plurality of non-optical components arranged within the housing. The carrier includes one or more frame components that are configured to rotate relative to the housing about one or more axes of rotation. The optical assembly includes one or more lenses and an image sensor. The optical assembly is movable relative to the housing via the carrier about the one or more axes of rotation. At least one of the non-optical components is (1) operably coupled to the optical assembly and (2) not supported by the carrier.

Abstract: A damping structure configured for connecting a gimbal with a carrier includes a first connecting member connectable with the gimbal, a second connecting member connectable with the carrier, and a damper elastically disposed between the first connecting member and the second connecting member. The damper includes a damper body, a first fixed portion, and a second fixed portion. The first fixed portion and the second fixed portion are configured to connect with two opposite sides of the damper body, respectively. The first fixed portion includes an elastic ring sleeve configured to sleeve couple with the first connecting member. The second fixed portion is connected with the second connecting member.

Abstract: A damping structure configured for connecting a gimbal with a carrier includes a first connecting member connectable with the gimbal, a second connecting member connectable with the carrier, and a damper elastically disposed between the first connecting member and the second connecting member. The damper includes a damper body, a first fixed portion, and a second fixed portion. The first fixed portion and the second fixed portion are configured to connect with two opposite sides of the damper body, respectively. The first fixed portion includes an elastic ring sleeve configured to sleeve couple with the first connecting member. The second fixed portion is connected with the second connecting member.

Abstract: A method of operating a mobile platform includes determining a threshold angle relative to the mobile platform of an imaging device mounted to the mobile platform that avoids obstruction of a field-of-view of the imaging device by one or more components of the mobile platform, and controlling the mobile platform according to the threshold angle.

Abstract: Protective cover for a gimbal camera of an unmanned aerial vehicle (UAV) and UAV are provided. The protective cover includes a stopper slidingly connected to the UAV and a locking member rotatably connected to the stopper. The locking member is configured to be locked to the UAV such that the stopper and the locking member are fixed to the UAV. The locking member is closed with the stopper to at least partially cover the gimbal camera.

Abstract: A damping structure configured for connecting a gimbal with a carrier is provided. The damping structure includes a first connecting member connectable with the gimbal. The damping structure also includes a second connecting member connectable with the carrier. The damping structure also includes a damper elastically disposed between the first connecting member and the second connecting member. The damping structure further includes a separation-proof member connected with the damper and configured to cause the damper to abut against at least one of the first connecting member and the second connecting member through a stretching force generated by vibration of the damper.

Abstract: A photographing device includes a camera module assembly, a glass disposed external to the camera module assembly to protect the camera module assembly, and a temperature sensor configured to detect an internal temperature of the photographing device. The photographing device also includes a heating element disposed on the glass. The photographing device further includes a controller configured to obtain the external temperature and to control the heating element to heat the glass when a difference between the internal temperature and the external temperature reaches a predetermined temperature.

Abstract: A method of imaging on a mobile platform includes exposing an imaging device mounted aboard the mobile platform at a plurality of positions of a component of the mobile platform to obtain images, determining, using the images, allowed positions of the component that do not obstruct a field-of-view of the imaging device, and controlling the imaging device according to the allowed positions to avoid imaging the component.

Abstract: An imaging device includes a housing, a carrier arranged within the housing, an optical assembly supported by the carrier within the housing, and a plurality of non-optical components arranged within the housing. The carrier includes one or more frame components that are configured to rotate relative to the housing about one or more axes of rotation. The optical assembly includes one or more lenses and an image sensor. The optical assembly is movable relative to the housing via the carrier about the one or more axes of rotation. At least one of the non-optical components is (1) operably coupled to the optical assembly and (2) not supported by the carrier.

Abstract: An unmanned aerial vehicle (UAV) includes a central body and a plurality of arms extending away from the central body. The central body includes a first body portion and a second body portion. The first body portion is configured to move translationally relative to the second body portion to transform the central body between a first configuration and a second configuration. Each of the plurality of arms is configured to couple to at least one propulsion unit configured to generate lift for the UAV.

Abstract: An unmanned aerial vehicle (UAV) system includes a first device including a housing space, a second device configured to be housed and held at the housing space, and a retaining structure configured to hold the second device at the housing space.