13results about How to "Does not affect transmission" patented technology

The invention discloses a laser cutting dust removal assembly for aluminum veneer machining. The laser cutting dust removal assembly comprises a dust removal pipe, a pipe body, a plurality of sound wave dust collection assemblies and a cyclone separator. One end of the pipe body is connected with the dedusting pipe; the multiple sound wave dust collecting assemblies are arranged on the inner wall of the pipe body in an annular array mode relative to the axis of the pipe body and used for collecting dispersed dust in the axis area of the pipe body; the sound wave dust collection assembly comprises a mounting pipe, a piezoelectric ceramic transducer and a concave surface focusing lens, the mounting pipe is arranged on the inner wall of the pipe body, an opening of the mounting pipe faces the center of the pipe body, the piezoelectric ceramic transducer is arranged in the mounting pipe, the concave surface focusing lens is arranged at the opening of the mounting pipe, and the concave surface of the concave surface focusing lens faces the piezoelectric ceramic transducer; the cyclone separator comprises an air inlet, and the air inlet is connected with the other end of the pipe body. According to the dust collection device, dispersed dust can be concentrated through the multiple sound wave dust collection assemblies, cloud clusters are formed, dust collection is facilitated, and the dust collection reliability and safety are improved.

This application provides a vocal practice assistance system based on vocal cord fatigue analysis, comprising: a surface-mounted electrode for attaching to a detection target to acquire electromyographic (EMG) signals; an EMG signal acquisition module for acquiring the EMG signals transmitted by the surface-mounted electrode and performing analog-to-digital conversion; a data transmission and reception module for sending the EMG signals acquired by the EMG signal acquisition module to a host computer and receiving relevant information; a preprocessing module for preprocessing the EMG signals transmitted by the data transmission and reception module to reduce noise; a signal separation module for separating the preprocessed EMG signals; a feature extraction module for acquiring the time-domain and frequency-domain features of the EMG signals; and a fatigue analysis module for linearly fitting the time-domain and frequency-domain feature curves and analyzing the vocal cord fatigue trend through the slope of the linear fitting equation. This system can monitor and analyze the degree of vocal cord fatigue in real time and provide a convenient and reliable vocal practice assistance device for vocal professionals.

The ship cabin liquid level switch protection device comprises a protection cover body, one side face of the protection cover body is of an open structure, the protection cover body comprises a fixed panel at the bottom, the fixed panel is connected with a liquid level switch, the upper portion of the liquid level switch penetrates through the fixed panel and extends into the protection cover body, and the liquid level switch is arranged in the protection cover body. The upper portion of the liquid level switch is located in the protective cover body, and a signal line at the upper end of the liquid level switch extends out of the open structure of the protective cover body. According to the ship cabin liquid level switch protection device provided by the utility model, the liquid level switch can be always in a semi-closed protected state, the ship liquid level switch is greatly ensured not to be easily damaged by external force, the service life of the liquid level switch is prolonged, and the accuracy of acquisition of various data of a cabin is improved; and safe navigation of the ship is ensured.

The application provides a lens module and a laser cutting head, and relates to the field of laser cutting. The lens module comprises a working lens module, a fixed support seat and a temperature field detection module; a temperature sensing surface of the temperature field detection module is arranged towards the working lens module, and the temperature field detection module is configured to monitor the temperature of the working lens. Based on the lens module provided by the application, the application further provides a laser cutting head, wherein the first protective lens module, the collimating lens module, the focusing lens module and the second protective lens module are sequentially arranged in the axial direction of the laser cutting head; and the second protective lens module is close to the nozzle of the laser cutting head. The lens module and the laser cutting head provided by the application can realize the monitoring and feedback of the lens temperature based on the reasonable arrangement of the temperature field detection module, thereby enhancing the safety and reliability of the product, improving the user experience, and assisting data analysis and optimization.

The utility model discloses a kind of multi-nozzle composite extrusion devices with nozzle spacing fine adjustment, it is related to extrusion device technical field, including extrusion assembly and first structural member, the output end side of extrusion assembly is horizontally provided with first structural member, and the side of first structural member close to extrusion assembly is horizontally provided with second adjusting structural member, and the both ends of second adjusting structural member and first structural member are provided with moving member.The multi-nozzle composite extrusion device with nozzle spacing fine adjustment is provided with first structural member, second adjusting structural member, moving member, the combination of the structure of three is used, so that the material extrusion head in the four groups of discharge components connected with it, under the screwing adjustment of bidirectional screw rod, the horizontal vertical spacing between different material extrusion heads is realized micro-adjustment, so as to guarantee the structural flexibility of device, in addition, the structure combination between discharge component and extrusion assembly makes it convenient for operating personnel to split maintenance, provides convenience for operation.

The utility model discloses an outdoor sound box for a beach buggy, which relates to the technical field of outdoor sound equipment and comprises a sound equipment body, a loudspeaker is embedded on one side of the sound equipment body, a fine filter screen is arranged on one side of the sound equipment body, which is positioned on the loudspeaker, and a coarse filter screen is arranged on one side of the fine filter screen, which is far away from the loudspeaker. And one side, close to the loudspeaker, of the sound equipment body is fixedly connected with a first fixing assembly. By adopting the structure, the coarse filter screen and the fine filter screen are arranged at the loudspeaker, the outermost layer is the coarse filter screen and can filter large-particle sand and dust, and the inner layer is the fine filter screen and can block fine sand and dust without influencing sound transmission, so that abrasion of internal parts caused by invasion of sand and dust is effectively avoided; the problems of sound quality distortion, noise and the like caused by sand and dust are fundamentally eliminated, a user can always enjoy a clear sound effect in the driving process of the dune buggy, the coarse filter screen and the fine filter screen are convenient to replace through the arrangement of the first fixing assembly, and the maintenance difficulty is reduced.

The utility model discloses a quick color change type polyurethane sound insulation glue mixing device, and relates to the field of sound insulation glue production equipment, the quick color change type polyurethane sound insulation glue mixing device comprises a built-in barrel, a material uniformizing mechanism and a re-stirring mechanism, the bottom of the built-in barrel is provided with a guide outlet, the material uniformizing mechanism is used for multi-stage material mixing in unit time, and the re-stirring mechanism is used for re-stirring materials. According to the rapid color changing type polyurethane sound insulation glue mixing device, four material distributing cavities are formed in the material distributing barrel, a main rotating gear rotates to drive a transmission gear, a rotating rod and a right-angle plate are made to rotate, the materials in all the cavities are stirred, the bottoms of the material distributing cavities are of hollow structures, the materials enter an outer closing barrel through a guide-out opening, and the materials are mixed through the outer closing barrel; in the process, the material uniformizing mechanism performs multi-stage mixing on the materials in unit time, the materials are preliminarily mixed in the material distributing barrel through the design of different cavities and the rotation of a right-angle plate, the hollow structure ensures that the materials smoothly fall into the next link, and a foundation is laid for the whole mixing process.

This utility model discloses a cardboard slitting and creasing machine, including a frame. A fixing device is provided on the upper surface of the frame. The fixing device includes a fixing roller. The fixing roller applies pressure to the top of the cardboard to keep the cardboard stable during the slitting and creasing process. This cardboard slitting and creasing machine, through the setting of a processing device, slits the cardboard. A conveyor motor drives a drive rod to rotate. The gear of the rotating rod meshes with the gear of the drive rod, driving the drive rod to rotate. At the same time, it drives a round rod with a cutting wheel to rotate, driving the conveyor roller to rotate synchronously. The synchronous wheel on the outer surface of the drive rod drives a conveyor roller of the conveyor belt to rotate through a synchronous belt, thereby driving the conveyor belt to move. The telescopic rod of the creasing electric push rod is fixedly installed with the fixed frame, driving it to rise and fall. The creasing motor drives the rotating rod to rotate, driving the creasing wheel to rotate. The slitting electric push rod drives the cutter to rise and fall. This application has the effect of creasing and slitting cardboard after it is fixed.

This invention discloses a solar cell and its fabrication method, components, and system. The solar cell includes a silicon substrate, a doped layer and a passivation layer sequentially stacked on the back side of the silicon substrate. The passivation layer has electrode trenches that locally expose the doped layer, and the electrode trenches are provided with a back electrode. The back electrode includes a seed metal silicide layer, a seed metal oxide thin layer, a mixed conductive layer, and an outer metal layer sequentially stacked on the back side of the locally exposed doped layer. The seed metal silicide layer is one or more layers selected from molybdenum silicide, nickel silicide, and titanium silicide layers; the seed metal oxide thin layer is one or more layers selected from molybdenum oxide, nickel oxide, and titanium oxide thin layers; and the thickness of the seed metal oxide thin layer is no greater than 20 nm. This solar cell has a novel electrode structure, which can promote improvements in electrode structure and performance, and reduce costs. The novel electrode structure of this solar cell exhibits good current transport performance and low metal recombination loss.

This invention discloses a broadband absorption structure with independently adjustable polarization frequency, belonging to the field of frequency-selective absorber technology. The structure comprises six alternating layers of ideal conductor PEC frequency-selective surfaces and three layers of F4B dielectric substrate. The frequency-selective surfaces are divided into lossy and lossless arrays. Both types of arrays consist of two orthogonal sublayers arranged in the same manner. All sublayers are printed on the dielectric substrate and isolated from each other by air layers. Both the lossy and lossless arrays integrate varactor diodes for independently controlling the transmission windows of TE-polarized and TM-polarized incident waves. This invention achieves true independent polarization frequency modulation, overcoming the shortcomings of traditional structures that cannot achieve independent polarization characteristics. It allows independent adjustment of the transmission frequencies of TE and TM polarizations without affecting the transmission and control response of cross-polarized waves.

This invention discloses a gearbox, comprising: a housing; a power input shaft and a power output shaft rotatably passing through the housing; a gear set; wherein the gear set is divided into several relatively independent units with different transmission ratios, each unit including an input half-shaft, an output half-shaft, a brake gear, and a brake assembly, the brake gear being coaxially and rotatably fitted onto the output half-shaft, and the brake assembly being used to brake the brake gear of the corresponding unit when the corresponding unit becomes a power output line; a pair of planetary gears, half-shaft gear one, a pair of planetary gears, and half-shaft gear two meshing sequentially. Compared with existing mainstream gearboxes, it can switch output speed gears without a clutch, is less prone to damage, and reduces the jerkiness of gear shifting operations.

The invention discloses a method and an apparatus in a node for wireless communication power control. A node receives a first reference signal, and generates a first path loss for the reception of the first reference signal; determining a sending power value of the first signal, sending the first signal, and determining a sending power value of the second signal; the sending power value of the first signal is equal to a first power value; the sending power value of the second signal is equal to a second power value; the first power value depends on a first reference power value, and the first reference power value depends on the first path loss; the second power value depends on a second reference power value; the time domain resource occupied by the first signal and the time domain resource configured for transmitting the second signal are overlapped; the second power value depends on whether a sum of the first reference power value and the second reference power value is greater than a first maximum power value. According to the invention, power control after the sensing signal is introduced is optimized.

The invention discloses a membrane electrode assembly for an electrochemical hydrogen compressor and a preparation method of the membrane electrode assembly. The membrane electrode assembly comprises a proton exchange membrane, and a slurry layer, a catalyst layer and a slurry layer are sequentially stacked on the surface of the proton exchange membrane; through the sandwich type structural design of the proton exchange membrane, the slurry layer, the catalyst layer and the slurry layer, falling and loss of catalyst particles in the reaction process are reduced, continuous and efficient utilization of a catalyst is guaranteed, more attachment sites are provided for the magnetron sputtering catalyst particles through the rough slurry layer surface, and the reaction efficiency is improved. The catalyst can be uniformly distributed at high density, the problem that catalyst particles are easily agglomerated on a smooth surface is avoided, and finally, excellent performance can still be kept under the condition of relatively low catalyst loading amount.