12results about How to "Improve directivity" patented technology

The invention relates to the field of multi-robot cooperative scheduling, and discloses a multi-robot cooperative scheduling unmanned underground mechanical garage system and method, and the system comprises a hardware subsystem which comprises a transfer robot, a parking space frame, a vertical elevator, and an entrance and exit junction area; the control system is deployed in the central control server, and the control system comprises a multi-layer dynamic data grid generation module which is used for constructing a discretized data grid corresponding to a garage physical space; and the central data calculation module is used for continuously updating the data of each data layer in the multi-layer dynamic data grid according to the real-time state of the garage. In the regional congestion degree and traffic control layer, the congestion index is calculated according to the density, the speed variance and the dispersion in the movement direction of the transfer robot, and the task gravitation modulation coefficient is generated, so that the tendency of the robot to enter the crowded region is reduced, the adaptive dispersion of the traffic flow is promoted, and the continuity of garage operation is maintained.

The invention provides a directional diagram reconfigurable liquid transparent antenna applied to ocean communication. The antenna is composed of a hexagonal star-shaped radiation cavity, an inverted L-shaped feed probe and a liquid ground. Through design and processing, besides a feed structure, the whole antenna realizes full transparency, has a good optical stealth effect, and has more application scenes. By utilizing the liquidity of liquid, distilled water is injected into different cavities, and the electric field distribution of the radiation cavity is changed, so that different patterns are generated. The antenna can realize a reconfigurable function of a directional diagram at 2.22-2.63 GHz, has five states of directional diagram switching modes, namely + / -15 degrees, + / -35 degrees and 0 degree, has better impedance matching and radiation directivity, and has a good optical stealth effect due to the transparent appearance.

The application discloses a quasi-zero stiffness vibration isolation and pointing integrated platform, which comprises a base platform, a working platform and a plurality of leg mechanisms with quasi-zero stiffness characteristics arranged between the base platform and the working platform, one end of the leg mechanism is connected with the base platform through a two-axis flexible hinge, and the other end of the leg mechanism is connected with the working platform through a three-axis flexible hinge, so that spatial six-degree-of-freedom wide-band vibration isolation and pointing control are realized. The application utilizes linear and nonlinear positive stiffness structures to compensate for negative stiffness structure design, designs passive quasi-zero stiffness structures and active quasi-zero stiffness structures, composites the passive quasi-zero stiffness structures and the active quasi-zero stiffness structures to form quasi-zero stiffness legs, the quasi-zero stiffness legs can bear large loads, the ideal balance position adjustment of the passive quasi-zero stiffness structures can be realized by translating the negative stiffness structures of the passive quasi-zero stiffness structures, the ideal balance position adjustment of the active quasi-zero stiffness structures can be realized by translating the nonlinear positive stiffness structures of the active quasi-zero stiffness structures and adjusting the current size, so that the leg length is adjustable, and the quasi-zero stiffness legs have the pointing function.

The application provides a marine rainstorm diagnosis method and system based on a multi-source remote sensing South China Sea summer monsoon index, relates to the meteorological monitoring technical field, and comprises the following steps: acquiring multi-source remote sensing data such as a South China Sea wind field, a temperature field and a humidity field, calculating a monsoon comprehensive index field, and performing time-space gradient analysis to identify an abnormal region. Based on the spatial position and evolution trend of the abnormal region, the intensity of kinetic energy input and thermal energy output is calculated respectively, and whether the energy budget is in a positive feedback enhancement state is determined by comparison. Finally, the rainstorm diagnosis result is generated by coupling the evolution path of the index field and the energy state, and more accurate and timely diagnosis and early warning of the South China Sea marine rainstorm are realized.

This application provides a sound amplification device based on M-H metamaterials and a sound propagation method utilizing them. The sound amplification device includes at least an upper shell, a lower shell, and a waveguide located between the upper and lower shells. The waveguide is made of Mie metamaterials. The waveguide includes an outer wall with multiple sound wave inlets. The upper shell, lower shell, and outer wall enclose and form a waveguide space. A through-hole is provided within the waveguide space, penetrating the waveguide and the upper shell, serving as the sound wave outlet in the sound amplification device. The waveguide includes multiple fan-shaped sections arranged circumferentially around the through-hole. A waveguide channel is formed between adjacent fan-shaped sections, connecting the sound wave outlet and the sound wave inlets. The control current of the sound source is determined by the size of the sound amplification device and the scattering distribution of the sound amplification device under different resonance modes. The sound energy level at the sound wave outlet is higher than that at the sound source, and the propagation direction has an angle. By determining the control current at the sound source that best matches the size of the sound amplification device, low-cost, high-precision, and widely applicable sound propagation control is achieved.

This invention discloses a strip defect detection light source and defect detection device. The strip defect detection light source includes a lamp bead, a first transmitting element, a second transmitting element, and a reflector. The first transmitting element includes a first light-inlet surface and a first light-outlet surface. The first light-inlet surface is convex, and the lamp bead is located at the focal point of the first light-inlet surface. The first light-outlet surface includes alternating first flat portions and first concave portions, with the concave portion of the first concave portion facing the centerline of the first light-outlet surface. The second transmitting element is fixed on both sides of the first transmitting element and surrounds the light-emitting side of the lamp bead. There are two reflectors, each fixed to one side of the two second transmitting elements away from the first transmitting element. This invention achieves directional refraction through the first concave portion, guiding the light from the central region of the light source to both sides in an orderly manner, effectively supplementing the light amount in the lateral regions, and achieving uniform light output across the entire area. At the same time, it maintains high directivity of the light throughout the process, avoiding interference from diffuse light with the imaging effect of defect detection.

The utility model provides a loudspeaker with an additional heat dissipation structure, which comprises a magnetic conduction carrying component, a magnetic force driving component, a magnetic conduction matching component, an excitation stress component, a vibration sound production component, a sound production guide component and a driving heat dissipation component. Meanwhile, unnecessary vibration interference is reduced, a guide space is formed by a guide outer cylinder and a guide end of the sound production guide component, sound produced by the vibrating diaphragm is guided, directivity and distribution uniformity of the sound are improved, the sound is transmitted more intensively, and a heat dissipation cover ring of the driving heat dissipation component is made of a heat conduction material, so that heat dissipation efficiency is improved. The heat dissipation cover ring is arranged on the outer wall of the magnetic force driving component and connected to the outside of the driving magnetic ring, heat generated by the magnetic force driving component in the working process is effectively dispersed and released, the heat dissipation area is further increased through the heat dissipation ring groove formed in the outer wall of the heat dissipation cover ring, the heat dissipation efficiency is improved, and the stability and reliability of the loudspeaker in the working process can be kept.

The utility model relates to the field of coaxial mid-high pitch sound boxes, in particular to a coaxial cylindrical wave mid-high pitch sound box, which ensures coaxial transmission of sound by arranging a mid-low pitch unit, a high pitch unit and a high pitch horn on the same axis, and is favorable for forming a more consistent and clearer sound field. By arranging the high-pitch fixing frame, the stability of the structure is ensured, and the high-pitch unit can be installed and adjusted in position independently of the middle-low unit. Compared with a traditional design, the mode greatly simplifies the assembly process, and meanwhile, the flexibility is also improved. By arranging the high-pitch horn, high-frequency sound waves are guided and diffused, the directivity and the coverage range of high-frequency sound are improved, and distortion is reduced. And unnecessary sound wave reflection and interference are reduced by arranging the diversion holes, so that the overall sound quality of the sound box is improved. The problems of poor independence between the alto unit and the high pitch unit and difficulty in position adjustment of the existing coaxial cylindrical wave alto-high pitch sound box are solved.

According to one embodiment of the utility model, the massage device is characterized by comprising a body massage part for accommodating at least one part of the body of a user and massaging the body of the user; an arm massage unit which is provided on a side portion of the body massage unit, accommodates an arm of a user, and performs a massage operation on the accommodated arm as a target; a rotation module that rotates the arm massage unit in one or more directions; the detection sensor is arranged on the arm massage part and is used for monitoring an object in a detection area; and a control unit that performs control so as to execute a detection subsequent mode using a detection signal input from the detection sensor. According to the massage device provided by the embodiment of the utility model, when a safety accident occurs or the safety accident is predicted to occur under the condition that a user cannot recognize the safety accident, a mode for realizing the safety of the user and the device or the convenience of the user is automatically driven, so that higher user directivity can be realized.

The application discloses a speech recognition method, device and equipment and a storage medium. The method comprises the following steps: performing encoding processing on speech feature data to obtain an encoded feature sequence; obtaining a first influence value and a second influence value of the feature sequence; wherein the first influence value represents a sentence granularity influence value, and the second influence value represents a speech frame granularity influence value; performing first decoding processing on the feature sequence combined with the first influence value to obtain a decoded first character sequence; performing masking processing on at least one character in the first character sequence based on a confidence value and the second influence value to obtain a mask sequence; performing second decoding processing on the feature sequence to obtain a decoded second character sequence; and obtaining a third character sequence as an output result of speech recognition based on the second character sequence and the mask sequence.

The application discloses a bogie bottom drag reduction cladding plate and a high-speed train bogie, and the cladding plate comprises a torsion bar cladding plate for cladding a torsion bar of a bogie frame, a first cladding plate for connecting a cross beam on one side of the torsion bar, and a second cladding plate for connecting a cross beam on the other side of the torsion bar. The first cladding plate and the torsion bar cladding plate form a first flow guide slope, the second cladding plate and the torsion bar cladding plate form a second flow guide slope, and the flow guide directions of the first flow guide slope and the second flow guide slope are symmetrically arranged. The application guides the airflow originally acting on the region near the center pin hole and the torsion bar to the lower side of the torsion bar cladding plate, optimizes the partial cladding and flow guide of the originally complex and abrupt bottom profile near the center pin hole and the torsion bar, forms a relatively continuous bottom flow guide surface, weakens the direct interference between the airflow and the complex components of the bottom, reduces the local flow separation, backflow and vortex intensity, improves the bogie bottom flow field distribution, and further achieves the purpose of reducing the aerodynamic drag of the bogie region.

The utility model relates to the technical field of sound equipment, and discloses a sound equipment structure capable of adjusting a sound field, the sound equipment structure comprises two ropes and a group of connecting pieces, the connecting pieces are arranged on the two ropes in a distributed manner, a group of walking mechanisms are arranged on the surfaces of the two ropes, and an electric push rod is arranged below each walking mechanism. According to the sound box structure capable of adjusting the sound field, the regional position adjustment of the sound box main body on the horizontal plane is realized through the movement of the walking mechanism on the rope track, the coverage range can cover linear, arc-shaped or grid layout, and the height of the sound box is adjusted by stretching and retracting the electric push rod, so that the sound box structure adapts to sound field projection requirements of spaces with different floor heights, such as theaters and exhibition halls; the pitch axis and the angle axis respectively control the pitch angle and the horizontal orientation of the sound box, ensure that the sound wave directivity is accurately matched with the audience position, directly optimize the sound source position and directivity, reduce the reflection sound stem from the source, and solve the problems of sound focusing, reverberation abnormity and the like which are difficult to process by a pure electronic means in a complex space.