100results about How to "Improve directivity" patented technology

The double-loudspeaker OWS Bluetooth earphone comprises a main body, an ear hook or a rear cover is arranged on the main body, a Bluetooth module is arranged in the main body or the ear hook or the rear cover, and a first cavity for placing a first loudspeaker and a second cavity for placing a second loudspeaker are arranged in the main body. The main body is provided with a first sound outlet hole and a second sound outlet hole, the first sound outlet hole is communicated with the first cavity and the second cavity, the periphery of the second cavity is provided with a sound guide tube, one end of the sound guide tube is communicated with the second cavity, and the other end of the sound guide tube is communicated with the second sound outlet hole. According to the structure, the sound of the first loudspeaker and the second loudspeaker can be independently processed and transmitted, the sound interference is avoided, and the sound quality is improved; and the sound of the second loudspeaker can be more directly and effectively transmitted to the second sound outlet hole through the sound guide tube, so that the definition and directivity of the sound are improved, sound leakage is avoided, the loss of low-pitch details is reduced, and high-fidelity sound quality is provided.

The invention provides a novel preparation method of mercaptosuccinic acid betaine (1: 1), and the preparation method adopts betaine and mercaptosuccinic acid as main raw materials, adopts water as a solvent, and enables the mercaptosuccinic acid and the betaine to directly react under a heating condition, so that the mercaptosuccinic acid betaine (1: 1) represented by a formula (I) is obtained with high purity. # imgabs0 #

The invention discloses a feeder action recording method, a wave recording system, a control device and a storage medium, and the method comprises the steps: obtaining and recording a sequence event file which comprises each action event of equipment, and sorting the action events according to a time axis; monitoring the fed-back current, and when the sudden change quantity of the current is greater than a current sudden change threshold value, performing wave recording processing on the current to form wave recording data; storing the recording data and the sequence event file based on a time axis; obtaining a first control instruction, and selecting a corresponding action event from the sequence event file according to the first control instruction; according to the design, the wave recording data are simplified, the directivity is improved, the system maintenance cost is reduced, the monitoring flexibility is improved, analysis and comparison of workers are facilitated, the workload is reduced, and the research and judgment accuracy is improved.

An optical termination device (30) is provided with a first termination waveguide (50). The first termination waveguide (50) includes a curved waveguide (51) and a curved waveguide (52). The curved waveguide (51) includes a unique maximum curvature portion (51m). The curved waveguide (52) includes a unique maximum curvature portion (52m). A first normal vector of the curved waveguide (51) in the maximum curvature portion (51m) and a second normal vector of the curved waveguide (52) in the maximum curvature portion (52m) face the same direction as each other.

The invention relates to the technical field of refrigerator refrigeration and defrosting, in particular to a refrigerator evaporator with a high-precision defrosting mechanism, which comprises an assembly frame body mounted on a refrigerator, and fins are fixedly mounted in the assembly frame body through a coil pipe. According to the refrigerator evaporator with the high-precision defrosting mechanism, a transverse flow guide pipe internally provided with a transverse flow fan is fixedly assembled in the assembly frame and located on one side of the fins, so that the air cooling uniformity of the evaporator is greatly improved, and the air cooling effect is improved; the air outlet is formed in the inner wall of the assembly frame and located on one side of the fins, the electric control type flow guide cover is installed in the air outlet, the refrigeration mode of the refrigerator can be changed according to needs, operability is improved, and application scenes are more diversified. The temperature sensor is installed on the electric control type flow guide cover, the electric heating film is installed on the inner wall of the air outlet of the transverse flow guide pipe, and the electric heating film is automatically started according to the temperature difference of different areas, so that air heating defrosting is accurately and directionally started, and energy waste caused by large-area defrosting is avoided.

The utility model discloses a thin loudspeaker of an alto cone frame, which comprises a fixed seat, a connecting block sleeved at the upper end of the fixed seat, a sensing assembly arranged at one side of the outer end of the connecting block, a cone fixedly connected at the upper end of the connecting block, and a plurality of threaded holes arranged at the periphery of the top end of the cone. Wherein the upper end of the sound basin is provided with an elastic ring film, the sound transmission assembly is fixedly installed in the fixed seat and is used for sound transmission, through the synergistic effect of the sound transmission assembly, the sound basin, the elastic ring film and the hemispherical cover body, accurate conversion from an electric signal to a sound wave, the magnetic field effect of the sound transmission assembly and vibration generation are realized, and the sound transmission effect is improved. The sound cone can accurately generate vibration along with the change of an electric signal, and meanwhile, the design of the elastic ring film and the hemispherical cover body further enhances the transmission effect and focusing performance of sound, so that the sound is clearer.

The utility model discloses a sound guide rear seat of a condenser microphone and the condenser microphone, and particularly relates to the sound guide rear seat of the condenser microphone and the condenser microphone comprising the sound guide rear seat, the sound guide rear seat comprises a conical head, a base and two identical connecting parts, the conical head is a rotating body; the base is a hollow cylinder; the conical head and the base have the same rotating central axis; the first end of the base is connected with the conical head, and the second end of the base is connected with the two connecting parts. The condenser microphone is provided with the sound guide rear seat, so that the focusing and diffusion degree and direction of rear incoming sound can be changed, the frequency response characteristic of the condenser microphone can be improved, the directional characteristic can be optimized, the comb filtering effect and the sidelobe phenomenon can be inhibited, howling is reduced, and the condenser microphone has the advantages of simple structure, easiness in assembly, good acoustic performance and the like.

The application discloses a wearable split mobile computing and energy supply system based on dynamic resonance tracking and a dynamic wireless energy supply method thereof, relates to the technical field of mobile computing and wireless energy transmission, and aims to solve the problems of coupling deterioration and transmission efficiency reduction of a magnetic resonance wireless energy supply system in a receiving end motion. The system comprises a wearable host configured in a belt head form, which is internally integrated with a high-performance processing unit, a main transmitting coil unit, an adjustable matching network, a space perception module, a wireless energy supply control core, a mobile communication module, a short-distance wireless communication unit, a voice front end, a sensor unit and a touch display screen; a wearable belt internally contains a plurality of battery units to supply power to the host, and auxiliary transmitting coils are distributed on both sides of the belt to form a multi-array magnetic resonance transmitting coil array together with the main transmitting coil; and at least one interactive terminal is physically separated from the host and comprises a display unit, a magnetic resonance receiving coil, a rectification and voltage stabilization link, a buffer energy storage unit and a short-distance wireless communication module, and does not configure a main application processor. The wireless energy supply control core calculates the coupling state parameters of a magnetic resonance channel in real time based on the three-dimensional position and three-dimensional posture of the interactive terminal, generates frequency compensation instructions and power / phase distribution instructions, controls the adjustable matching network to dynamically adjust the working frequency to track the resonance point drift, controls the driving amplitude and phase of each unit of the multi-array coil array to form a directional energy beam, and realizes stable wireless energy supply in a dynamic scene.

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.

This utility model discloses a horizontal line array speaker, relating to the field of speaker technology. It includes a cabinet, inside which a first speaker and a second speaker are installed. The first speaker propagates sound outwards along a first outlet of the cabinet, and the second speaker propagates sound outwards along a second outlet. The sound waves emitted by the first speaker can cancel out the low-frequency sound waves from the side of the second speaker facing away from the second outlet, causing the low-frequency sound waves to primarily propagate towards the second outlet. This increases the concentration of sound wave propagation, effectively reducing the impact of ambient noise and thus increasing the sound wave energy on the side closer to the audience. The cabinet is equipped with a waveguide located on the side facing away from the first outlet. The waveguide can convert spherical waves into plane waves, which helps improve the directivity of the sound waves and saves space, allowing for a smaller cabinet size. The second outlet is equipped with a phase plug, which reduces the secondary reflection path of the sound waves, reduces bass looseness and resonance problems, makes the low frequencies tighter and more powerful, and enhances the sense of rhythm.

The utility model discloses a square small cross section longitudinal wave twin-crystal probe for ultrasonic detection of a base arc portion, which comprises a delay block, a sound insulation layer, a probe core, a sound absorption material and piezoelectric crystal plates which are arranged in a shell, the two piezoelectric crystal plates are square, the size of each piezoelectric crystal plate is 4 mm * 2 mm, and the total size is 4 mm * 4 mm. And the working frequency of the longitudinal wave twin-crystal probe is set to be 4MHz. The piezoelectric crystal plates are arranged to be square, the sizes of the two piezoelectric crystal plates are both 4 mm * 2 mm, the sound field directivity of the square piezoelectric crystal plates is better than that of a round piezoelectric crystal plate, the detection sensitivity is high, meanwhile, the piezoelectric crystal plates with small sections are adopted, the problem that coupling between the probe and the surface of a transition arc part of a machine base is poor can be solved, and the detection accuracy is improved. And the working frequency is controlled to be 2-6MHz, so that detection personnel can more accurately position and evaluate defects, and meanwhile, the detection sensitivity is improved.

The invention belongs to the technical field of LED display screens, and provides an LED display screen of a sound transmission structure, a detection device of the LED display screen and an LED module. The number of the sound transmission holes is multiple, and the sound transmission holes are constructed to be in an inverted cone shape; the PCB is installed at the rear end of the LED module, and a plurality of hole channels are formed in the PCB; the box body is installed outside the LED module and the PCB, a bottom shell is fixedly installed at the lower end of the box body, a bonding layer is arranged at the lower end of the bottom shell, a plurality of lamp beads are installed in the LED module, and the arrangement shape of the sound transmission holes and the hole channels is arranged according to the shape of the sound equipment; according to the LED module, the sound transmission holes are arranged to be inverted-cone-shaped, firstly, the inverted-cone-shaped sound transmission holes can ensure that the obstruction of sound in the transmission process is reduced, the sound is more smoothly transmitted to audiences or audiences through the LED module, the loss of the sound in the transmission process is reduced through the design, and the definition and the volume of the sound are improved; the inverted-cone-shaped design may also have a certain sound amplification effect.

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 utility model discloses release paper processing dust collection equipment convenient to disassemble, which comprises a back support, a strap arranged on the front side of the back support, a storage ring arranged on one side of the strap, a battery arranged at the upper end of the back support, a fixing plate arranged on one side of the back support, a dust collector arranged at the upper end of the fixing plate, a motor arranged inside the dust collector, and fan blades arranged at one end of the motor. A blocking net is arranged at the front ends of the fan blades, a storage bag is arranged at the lower end of the fixing plate, a hose is arranged at one end of the dust collector, a dust collection pipe is arranged at the front end of the hose, a handle is arranged at the upper end of the dust collection pipe, an adjusting knob is arranged at the upper end of the handle, a switch is arranged at the lower end of the adjusting knob, and an extension pipe is arranged at the front end of the dust collection pipe. The dust collection equipment convenient to disassemble is achieved, and the working efficiency is improved.

The invention relates to a low-frequency lightweight high-gain antenna, and relates to the technical field of compact range feed source antennas. The low-frequency lightweight high-gain antenna provided by the invention comprises a dielectric radiation section, a foam support section and a balanced feed section, the dielectric radiation section is composed of a plurality of concentric dielectric cylinders, electromagnetic waves can be radiated out, the antenna gain can be improved, and the foam supporting section is used for supporting the radiation section, so that a certain distance condition is met between the dielectric radiation section and the feed section. The radiation section adopts a balanced feed mode to excite the antenna, and dual polarization is realized at the same time. The antenna provided by the invention has the advantages of simple structure, low processing cost, high gain, light weight, wide bandwidth and the like.

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.

The invention discloses a preparation device and method of a foldable curved-surface polyimide fiber film. Pretreated crease positioning columns are installed on crease positioning holes in a mold base, and fiber fixing columns are installed on other fiber fixing holes in the mold base; the two ends of the main fiber penetrate through positioning holes of the crease positioning columns respectively and are fixed; placing the polyimide fiber in a polyamide acid solution, winding the secondary fiber on the fiber fixing column and the main fiber to prepare a polyimide fiber grid, carrying out heat setting treatment, spraying the polyimide solution on the polyimide fiber grid, and carrying out thermal imidization; the polyimide composite film subjected to thermal imidization is demolded and dried, and the fiber-reinforced foldable curved surface polyimide fiber film is obtained. The film provided by the invention has excellent high strength, high toughness, high heat resistance, corrosion resistance and the like, has good foldability and machinability, and has wide application prospects in the fields of aerospace, electronic information and the like.

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.

The invention relates to the technical field of low-carbon traffic construction, in particular to a low-carbon intelligent urban traffic guidance method and system and a storage medium, and the method comprises the steps: obtaining urban road static information, equivalently generating a pipeline network model, and setting ideal load data based on the urban road static information; urban road dynamic information containing traffic flow is collected, liquid flow is equivalently added into the pipeline network model, and real-time flow data of the liquid flow is set; setting a time parameter to enable the pipeline network model to simulate a flow task in a time range corresponding to the time parameter, and monitoring the dynamic change of real-time flow data of each pipeline in the flow task; comparing the dynamic change with ideal load data, and generating a liquid flow guide scheme according to a comparison result; the liquid flow guidance scheme is validated to be equivalent to a traffic flow guidance scheme. The method has the effects of realizing simplified prediction of the carbon emission influence scene of the complex traffic flow and low-carbon guidance of the traffic flow.

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 discloses hoisting equipment for house building engineering, which relates to the technical field of hoisting equipment and comprises a stable base, a hoisting equipment body is fixedly arranged on the top surface of the stable base, one end of the hoisting equipment body is fixedly connected with a hoisting rod, and a hoisting basket is arranged below the hoisting rod. The bottom face of the hanging basket is connected with a mounting base through a hinge piece, an auxiliary assembly is arranged in the mounting base, and by arranging the auxiliary assembly, during use, a screw can be rotated, the screw drives a movable block to move, when the movable block moves, a movable rod can be driven to deflect through a connecting plate, and when the included angle between the movable rod and the screw is increased, the movable rod is driven to deflect. According to the lifting basket, the lifting basket can be driven to deflect through the abutting block, and the lifting basket is connected with the mounting base through the hinging piece, so that the lifting basket can be jacked up towards one side, mortar or concrete and other building materials in the lifting basket can be conveniently poured out after the lifting basket is jacked up, and in the process, the unloading efficiency of workers is improved, and the working intensity of the workers is reduced.

The present disclosure provides a path search method, device and storage medium based on symbolic execution, which relates to the field of computer technology, wherein the method includes: using a generation-based path traversal algorithm to perform path search on a tested program, determining an available path in an executable path based on a preset path optimization function and path selection rules; performing bundle processing on the available paths of each generation to generate a bundle; sorting the bundle and the available paths in the bundle based on the in-bundle coefficients and out-of-bundle coefficients corresponding to the available paths; outputting the available paths in the bundle and the corresponding path constraints to a solver to generate a new input. The method, device and storage medium disclosed in the present disclosure optimize the generation-based path strategy algorithm, which can increase the directionality of the test; on the basis of high test coverage, it can save computing resources and improve the efficiency of the test.

The utility model discloses a floating linkage mechanism of an elevator, which comprises supports (2) mounted at two ends of a pipe fitting (1), each support is provided with a safety gear fixing seat (3), each safety gear fixing seat (3) is provided with a safety gear (4), and the safety gears (4) are slidably connected onto the safety gear fixing seats (3) along the horizontal direction. The end, provided with the movable clamp block, of the safety clamp (4) is provided with two or more sets of parallel elastic devices, the other end of the safety clamp (4) is provided with two or more sets of parallel positioning devices in the horizontal direction, and the elastic devices push the safety clamp (4) to abut against the positioning devices. And a guide device for guiding the movement of the safety tongs (4) in the horizontal direction is arranged on the safety tongs fixing seat (3). The mechanism adopts a plurality of groups of elastic devices and positioning devices, so that the floating is more stable, and a guide device is additionally arranged on the fixed seat on which the safety tongs are mounted, so that the safety tongs slide more stably and have better directivity.

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 invention relates to the technical field of display, and discloses a high-brightness backlight module and a vehicle-mounted display screen, and the high-brightness backlight module comprises a first prism light guide film, a second prism light guide film, a light guide plate and an LED light source assembly, the first prism light guide film and the second prism light guide film are sequentially arranged on the side where the light-emitting face of the light guide plate is located. A first microstructure is arranged on the light-emitting surface of the light guide plate, and a second microstructure is arranged on the reflecting surface of the light guide plate; a first prism sheet of the first prism light guide film is arranged back to the surface of the light guide plate; and a second prism sheet of the second prism light guide film is arranged opposite to the surface where the first prism sheet is located. According to the backlight module provided by the invention, the biprism light guide film is arranged on the light-emitting surface of the light guide plate, and the prismatic lenses of the biprism light guide film are back to the light guide plate, so that the light emitted from the light-emitting surface of the light guide plate is converted into the light emitted at 0 degree without energy loss, and the backlight module has relatively strong light collimation and high brightness.

The present invention provides an audio processing method, system, electronic device and readable storage medium, which relates to the field of signal technology, wherein the method comprises: obtaining the audio to be processed and the target playback mode corresponding to the audio to be processed; based on the target playback mode, determining the filter corresponding to each audio playback component; using each filter to filter the audio to be processed, obtaining the signal to be played corresponding to each filter, and transmitting the signal to be played corresponding to each filter to the audio playback component corresponding to each filter for playback. The flexibility and diversity of audio playback are improved.

An antenna device includes: a first radiator for radiating a first electromagnetic signal; a second radiator for radiating a second electromagnetic signal; and a joint feed network, which includes a first 180-degree coupler and a second 180-degree coupler arranged in sequence. The first 180-degree coupler receives a first input signal and a second input signal, and the second 180-degree coupler provides a first output signal to the first radiator and a second output signal to the second radiator. In the joint feed network, a first path connecting the first 180-degree coupler to the second 180-degree coupler includes a first phase shifter. A second path connecting the first 180-degree coupler to the second 180-degree coupler includes a second phase shifter and an attenuator. The antenna device exhibits improved system performance, such as higher directivity and lower beam deflection.

The utility model discloses a top net support of a condenser microphone and the condenser microphone. The top net support comprises a plurality of hollowed-out side plates, and a cylinder is defined by the side plates. According to the capacitor microphone, the hollow top net bracket is arranged, so that the side incoming sound can be improved, the side sound reflection can be reduced, the frequency response characteristic of the capacitor microphone can be improved, the directional characteristic can be optimized, the comb filtering effect and the side lobe phenomenon can be inhibited, and the capacitor microphone has the advantages of simple structure, easiness in assembly, good acoustic performance and the like.