35results about How to "Guaranteed continuous change" patented technology

The invention discloses an error-controllable industrial robot fairing movement track generation method which comprises the following steps: S1, generating an MOVEB movement instruction, describing an industrial robot movement track which comprises a track point and posture, a track point error threshold input by a user, and a chord height error threshold; S2, performing interpolation on a robot track point, namely performing interpolation on a high-order B sample curve into the track point according to the track point error and the chord height error threshold by using the high-order B sample interpolation algorithm, and respectively achieving G2 interpolation and G3 interpolation of the robot track point, so as to obtain an interpolation track which has high continuity and meets the track point error and chord height error requirements; S3, performing interpolation on the posture of the robot so as to obtain a robot posture curve with sectional G2 and continuous G3; S4, acquiring a movement track of the robot after interpolation according to the track point interpolation curve and the robot posture curve. By adopting the error-controllable industrial robot fairing movement track generation method, real-time continuous interpolation of the movement track can be achieved, calculation can be simple, efficient and precise, and vibration and abrasion of the robot can be reduced.

The invention relates to a method for active obstacle avoidance trajectory planning and stable tracking control of a two-wheeled self-balancing vehicle, which comprises an obstacle avoidance trajectory planning method based on a circular arc and a transition curve and a stable tracking control method based on a non-singular terminal sliding mode algorithm and a nested saturation algorithm. Trajectories planned by a local trajectory planning method comprise a lane changing trajectory, an overtaking trajectory and a lane combining trajectory. The non-singular terminal sliding mode algorithm controls a full-drive steering subsystem of the two-wheeled self-balancing vehicle, and the nested saturation algorithm controls an under-drive forward subsystem of the two-wheeled self-balancing vehicle. The obstacle avoidance trajectory planned according to the invention has the characteristics that the trajectory is gentle in curvature change and stable tracking of the under-drive two-wheeled self-balancing vehicle is facilitated; and the stable tracking control algorithm provided by the invention can enable the two-wheeled self-balancing vehicle to stably track the planned obstacle avoidance trajectory at a large initial value of the vehicle body inclination angle and keep the vehicle body to be stable at the same time, and thus active obstacle avoidance of the two-wheeled self-balancing vehicle is achieved.

The embodiment of the invention discloses a method and device for realizing content display of a component. The method comprises the following steps of: displaying a first display interface of the component on a terminal screen; acquiring a first display instruction; acquiring a second display interface of the component according to the first display instruction; and displaying the second display interface of the component on the terminal screen, wherein the second display interface comprises the first display interface. By using the method and the device provided by the embodiment, the display utilization rate of the interface is effectively increased, meanwhile, continuous change during display of application information of the component is also guaranteed, and the user experience is improved.

The invention discloses a long-wave infrared broadband achromatic metasurface lens, and belongs to the field of infrared imaging and the field of micro-nano photonics. Metasurface lens units in the metasurface lens are periodically arranged in a tetragonal lattice form; the metasurface lens unit is composed of a dielectric substrate and a microstructure located in the center of the dielectric substrate, and a projection pattern of the microstructure on the dielectric substrate is a graph which is in rotational symmetry about a 90-degree angle; the phase and phase dispersion introduced by the microstructures at different positions meet the following formulas shown as the specification, and the microstructure selection mode at each position is as follows: a theoretical parameter combinationis obtained according to the two formulas, the phase of the unit where each microstructure is located and the corresponding phase dispersion are obtained through weighted first-order linear fitting, and are recorded as actual parameter combinations, the parameter combinations are drawn in a same scatter diagram, and the microstructure corresponding to the actual parameter combination closest to the theoretical parameter combination is selected. According to the invention, broadband achromatism can be realized in a long-wave infrared band.

The invention relates to an intelligent wind tunnel with a variable section of a test section, wherein the inlet of the test section of the wind tunnel is connected to a contraction compressed gas retaining structure of a contraction section, and the outlet of the test section is connected to a steady flow section front end structure of a steady flow section; the test section is integrally in a rectangular structure and is composed of upper and lower two parts which are nested with each other, the upper part can move up and down in the lower part under the action of the telescopic structure, and the height of the lower end surface of the upper part is not greater than the distance from the upper ends of the outlet and the inlet to the top when the test section dose not stretch out and drawback; a rubber airbag plate is arranged on the inner wall side of the cavity of the test section, a plurality of rubber airbags are arranged on the rubber airbag plate, the inflation and deflation states of each rubber airbag are controlled by an air pump and a corresponding control valve; the above-mentioned telescopic structure, the air pump and the control valve are all connected to a controlsystem in a wind tunnel control room. The wind tunnel can automatically change the cross-sectional area and volume according to various data of the real scene as needed, which realizes intelligent useof the wind tunnel, and completes various pneumatic tests efficiently and reliably.

The invention belongs to the technical field of underwater acoustic communication, and particularly relates to a simulated dolphin whistle continuous phase multivariate frequency modulation underwateracoustic communication method. The method of the invention includes the following steps: performing continuous phase multivariate frequency modulation on information by a sending end; adding the modulated signal with a time-frequency spectrum profile of an extracted dolphin whistle signal in a certain proportion to generate a synthesized whistle, and further obtaining a simulated whistle data signal; adding an original whistle signal before the simulated whistle data signal to serve as a synchronization signal, and forming a frame of transmission signal; after a receiving end performs synchronization, extracting each symbol waveform; and calculating correlation functions between each symbol waveform and all possible signal waveforms of the symbol, and judging a maximum correlation peak toimplement demodulation. According to the simulated dolphin whistle continuous phase multivariate frequency modulation underwater acoustic communication method, provided by the invention, each symbolcan modulate a plurality of pieces of bit information, the communication rate is high, the similarity between the synthesized whistle signal and a real whistle signal is high, and the underwater acoustic communication method has strong concealment and can meet the requirements of underwater covert acoustic communication.

The invention discloses a wide face copper plate of a sheet billet hopper-shaped crystallizer and based on a transition curve and a manufacturing method. According to the wide face copper plate, the transition curve and a circular curve are adopted, combined and connected to form a transverse curve on the basis that a billet shell solidification contraction and deformation mechanism is taken intoaccount, and therefore the situation that the transverse curvature of a cast billet continuously changes is guaranteed, and the transverse stress of a billet shell is reduced; and a hyperbolic taper curve is adopted by a longitudinal curve, and the change of the curvature of the portion nearby the meniscus face is large so that the requirement for the taper of the portion nearby the meniscus facecan be preferably met. The wide face copper plate of the sheet billet hopper-shaped crystallizer and based on the transition curve has the advantages that the design of the transverse curve and the longitudinal curve conforms to the solidification contraction rule of the cast billet, and therefore the stress of the cast billet is conveniently reduced, the generation probability of cracks of the cast billet is reduced, and the requirement of the high casting speed for the copper plate of the sheet billet crystallizer is met.

The invention discloses a preparation method for a titanium-aluminum-zirconium nitride film-coated hard alloy drill bit, and relates to a preparation method for an alloy drill bit. A method for preparing a titanium-aluminum-zirconium nitride film-coated hard alloy drill bit through a multi-arc ion plating technology sequentially comprises the following steps: 1) determining a deposition technology; 2) determining the numbers of target materials and electric arc sources; 3) selecting the hard alloy drill bit and carrying out pretreatment; 4) placing the hard alloy drill bit; and 5) determining a film-coating process. According to the method, the titanium-aluminum-zirconium nitride film-coated hard alloy drill bit is prepared through the multi-arc ion plating technology, two titanium-aluminum alloy targets and two titanium-zirconium alloy targets are determined as cathode arc source targets; and a whole set of special film-coating deposition process is determined, so that the prepared titanium-aluminum-zirconium nitride film-coated hard alloy drill bit has the characteristics of being high in adhesion force, high in hardness and long in service life compared with a hard alloy drill bit which is not subjected to film-coating.

The invention discloses a game method for conducting interaction control to a self-deformable image. (1), before a control signal is received, a border of an image target in a game moves according tospeed set by a system, so the image target can continuously change a shape and size with time; (2) a user selects a border of the image target and inputs a control signal, so a border position in a control signal action range can continuously change with time according to a control rule regulated by the system, and the border unaffected by the control signal can remain the original movement state;and (3) control success is determined if the shape and size of the controlled image target meet a preset target, otherwise, the step (2) is continued. The game method can be conveniently executed; and the user can acquire great instant interaction gaming experience.

The invention relates to a rapid continuous adjustment method for a diffraction-free two-dimensional optical crystal lattice period. A zoom lens and a lens are sequentially added along an optical axis on an optical path for generating a two-dimensional optical crystal lattice. The position of a back focal plane of the zoom lens is kept unchanged during focusing, and the distance between the zoom lens and the lens is the sum of the back focal length of the zoom lens and the front focal length of the lens; by adjusting the focal length of the zoom lens, the continuous change of the amplification factor of the beam expanding system is achieved, so that the rapid continuous adjustment of the diffraction-free two-dimensional optical lattice period can be achieved.

The invention relates to a vacuum external regulation apparatus for a pitch angle of a high-resolution flying time mass spectrum detector. The vacuum external regulation apparatus comprises a body flange, two regulation screw rods and a pitching board; one side of the body flange is an atmosphere side while the other side of the body flange is a vacuum side; two sealing differential blocks are fastened and connected in the atmosphere side of the body flange spaced at a degree of 180 degrees; a sealing hole for penetrating through the vacuum side of the body flange is formed in each sealing differential block; a screw rod matching block with a threaded hole in the centre is fastened and connected in the top of each sealing differential block; the two regulation screw rods are arranged in the sealing holes of one sealing differential block; a threaded rod is arranged at one end of each regulation screw rod while a central threaded hole is formed in the other end of each regulation screw rod; the threaded rods of the regulation screw rods are matched and connected with the threaded hole of the screw rod matching block; one end, with the central threaded hole, of the regulation screw rod extends to the vacuum side of the body flange; the pitching board is supported in the vacuum side of the body flange at intervals through two threaded rods that are matched and connected with the central threaded holes of the regulation screw rods; and the pitching board is fastened and connected with the mass spectrum detector through a plurality of threaded rods.