5results about How to "Implement navigation" patented technology

The application discloses a kind of based on hovering underwater vehicle's underwater unknown environment active mapping method, belong to robot environment exploration technical field.The underwater unknown environment active mapping method based on hovering underwater vehicle provided by the application utilizes hovering underwater vehicle to obtain the environmental data of unknown area of ocean in cooperation with sensor, determines the best next viewpoint according to information gain value, and determines the safe and feasible path to the best next viewpoint according to the cost of each adjacent node on the current tree as the parent node when the best next viewpoint is reached.Updating grid map in real time in this way, efficiently, quickly and accurately realize the construction and dynamic updating of map, and then assist underwater vehicle to realize the navigation of target area, and has broad application prospect in underwater environment exploration task and underwater structure inspection based on underwater vehicle and similar tasks.

The application discloses an ultrasonic driving nanorobot and a preparation method and application thereof, and the preparation method comprises the following steps: reacting Pd NPs, 4-mercapto phenylacetic acid and polyacrylic acid, adding tetraethyl orthosilicate and ammonia, and stirring to obtain PdSiO2; reacting titanium chloride solution, sodium bicarbonate solution and PdSiO2, and performing amino modification to obtain NH2-TiO2-Pd-SiO2; connecting COOH-PEG-TPP and COOH-PEG-RGD to the surface of NH2-TiO2-Pd-SiO2, and removing SiO2; the nanorobot can penetrate the dense extracellular matrix in a tumor microenvironment and precisely target a diffuse lesion, and further has the functions of catalytically generating active oxygen free radicals and regulating a tumor microenvironment, so that the oxidation-reduction / metabolic balance of the TME is changed, immunogenic cell death is induced, and the anti-tumor immune response is further enhanced.

The utility model discloses an unmanned diving device. The unmanned diving device comprises a frame body; one end of the mounting assembly is fixedly connected with one end of the frame body; the sealing assembly is arranged at the other end of the frame body, a controller is arranged in the sealing assembly, and the controller is used for controlling movement of the unmanned diving device; the sampling assembly is arranged at the end, away from the frame body, of the sealing assembly, and the sampling assembly is electrically connected with the controller; and the sonar sensor is arranged on one side of the sealing assembly, and the sonar sensor is electrically connected with the controller. The unmanned diving device is small in size, simple in structure, high in working efficiency, convenient to transport and high in control precision.

The invention discloses an unmanned aerial vehicle for logistics transportation and an unmanned aerial vehicle system, and relates to the technical field of logistics unmanned aerial vehicles, the unmanned aerial vehicle comprises a mounting platform, a limiting ring is mounted at the bottom of the mounting platform, a connecting disc is rotatably connected to the inner wall of the limiting ring, a fixing bracket is mounted at the bottom of the connecting disc, and a placement plate is mounted at the bottom of the fixing bracket; according to the unmanned aerial vehicle for logistics transportation and the unmanned aerial vehicle system, through the arrangement of the mounting platform, the fixed bracket, the placement plate, the positioning plate, the protection frame and the extrusion plate, a cargo bearing platform with a horizontal rotation adjusting function is constructed; on the basis, a self-adaptive cargo clamping system in which a lead screw transmission mechanism and a cross connecting rod clamping mechanism cooperatively work is integrated, and a first driving mechanism drives an extension pipe to stretch out and draw back through a positive and negative rotation lead screw, so that quick positioning of cargoes with different widths is realized; therefore, the problems that in the prior art, the cargo loading direction is fixed, air flow interference is likely to happen in the flight process, and unloading in a narrow space is inconvenient are solved.

This application provides a wearable device, belonging to the field of electronic technology. The wearable device includes: a main circuit board, a secondary circuit board, and a first GNSS antenna; the main circuit board and the secondary circuit board are stacked and spaced apart; the main circuit board has a feeding circuit, and the secondary circuit board has a grounding circuit; the first GNSS antenna has a feeding point and a grounding point, the feeding point being electrically connected to the feeding circuit, and the grounding point being electrically connected to the grounding circuit. In this wearable device, the first GNSS antenna is arranged between the main circuit board and the secondary circuit board, utilizing both circuit boards for feeding and grounding respectively. The first GNSS antenna does not need to share a frame structure with other antennas, has better clearance conditions, and possesses higher GNSS communication performance, thereby enabling the wearable device to achieve functions such as precise positioning, motion tracking, and navigation.