44results about How to "Reduce noise level" patented technology

The utility model discloses a miniature air pump with noise reduction structure, including motor and motor output end region installation has the noise reduction ventilation structure, the noise reduction ventilation structure includes base, and motor is fixed mounting close to output end shell and base, and motor output end rotation penetrates the base center position, and the penetration end passes through the shaft coupling and connects the swing bar, and the base top installs the fixed seat, and the fixed seat top is equipped with the umbrella cover through the sealing washer, and the fixed seat is provided with four cover holes of rectangular setting, and the base is provided with eccentric wheel, and the fixed seat is located cover hole fixed and is fixed and is communicated with tower shape ventilation cover, and the swing bar top end is rotatably connected with eccentric wheel center position, and the eccentric wheel is fixedly covered and is installed with tower shape ventilation cover bottom, and the noise reduction effect aspect shows outstanding. The unique structure of tower shape ventilation cover increases the gas flow path and the contact area, effectively promotes the smooth airflow in and out, significantly reduces the turbulence and vortex generation, reduces the airflow noise from the source.

The utility model discloses a 10-35kV energy storage and boost all-in-one machine, which comprises an energy storage module, a boost module and a control unit, a connecting mechanism is arranged between the energy storage module and the boost module, the connecting mechanism comprises a protection structure and a cooling assembly, a lead for connecting the energy storage module and the boost module passes through the protection structure, and the cooling assembly is connected with the control unit. The high temperature generated when the wire is electrified is reduced through the cooling assembly; the protection structure comprises an upper semicircular shell and a lower semicircular shell, and the upper semicircular shell is rotationally connected with the rear portion of the top of the lower semicircular shell. According to the 10-35kV energy storage and boosting all-in-one machine, the connecting mechanism is arranged between the energy storage module and the boosting module, so that a connected wire penetrates through the interior of the protection structure, the protection structure is convenient to open, wire arrangement is carried out, the temperature of the heated wire can be rapidly reduced through the cooling assembly, and the working efficiency is improved. And the condition of large loss caused by the wire temperature process is avoided.

This application relates to the field of robotic vacuum cleaner technology, and in particular to a silent motor for robotic vacuum cleaners, comprising a motor body and a noise reduction component. The noise reduction component is connected to the motor body via an elastic connector and includes a vibration absorption structure and a soundproof enclosure. The inner wall of the soundproof enclosure is provided with sound-absorbing sheets and filling material, and the bottom fixing bracket ensures installation accuracy through positioning pins. This application significantly reduces noise through the synergistic effect of vibration damping pads, sound-absorbing sheets, and elastic connectors, and adopts a split soundproof enclosure for easy maintenance while optimizing heat dissipation performance. This utility model solves the problems of complex noise reduction, high cost, and insufficient heat dissipation in existing motors, providing technical support for the miniaturization design of robotic vacuum cleaners.

A muffler, a pneumatic system or component, a commercial vehicle, and a method for venting gases from the pneumatic system of a vehicle are provided. The muffler (50) for a vehicle includes a noise-damping mesh material (40) and a muffler housing component (10), the muffler housing component forming a container for the noise-damping mesh material (40). The muffler housing component (10) includes an outer wall (20) and an end wall (26). The outer wall (20) extends circumferentially about a central axis (13) of the muffler housing component (10). The end wall (26) forms a recess (29). A delay structure (30) including at least one wall (31, 32, 33, 34) is arranged in the recess (29) and protrudes from the end wall (26). The delay structure (30) is configured to reduce the flow rate of gas exiting through the gas outlet passage of the muffler (50).

The utility model relates to the field of feed batching machines, in particular to a feed batching machine capable of adjusting the proportion, and solves the technical problem that no feed batching machine for rabbit breeding exists at present. The device comprises a material storage unit, a first material distribution box group, an air pump, a second material distribution box group, a material mixing tank and a driving unit, the storage unit comprises a powdery feed storage hopper and a long fiber feed storage hopper; the first material distribution box group is in one-to-one correspondence with the powdery feed storage hoppers, a plurality of discharge ports are formed in the bottom of each material distribution box, and each material distribution box is provided with an independent blocking air bag and is connected with an air pump through an inflation pipe; the second material distribution box group is provided with a guide roller group and a shear knife and is used for treating long-fiber feed; discharge ports of all the material distribution boxes are communicated to the material mixing tank, and material mixing stirring wheels driven by a first driving unit are arranged in the material distribution boxes; and the second driving unit drives the shear knife to horizontally reciprocate and is specially used for proportioning the rabbit feed.

The application discloses a shock-absorbing type culvert with animal migration and water discharge composite functions, and belongs to the technical field of animal passageways, which comprises a square culvert, shock-absorbing structures are arranged on the left side, the right side and the upper side outside of the culvert, the shock-absorbing structures relieve the vibration caused by vehicle driving, reduce the noise size in the culvert and prevent animals from being frightened. A composite light-emitting coating structure is arranged on the inside of the upper side of the culvert, the composite light-emitting coating structure weakens the light difference in the daytime and plays the night light performance at night, thereby providing guidance for animal migration. Drainage structures are arranged on the lower sides of the culvert, the drainage structures prevent the culvert from being washed away, animal passageways are arranged at the middle positions, outer extension plates are further arranged at the entrances and exits of the culvert, organic soil layers and water storage layers are arranged in the animal passageways, the outer extension plates and the organic soil layers and the water storage layers form a boat-shaped structure, water bodies are stored in the boat-shaped structure, the boat-shaped structure is beneficial to relieving the shortage of water resources in arid and semi-arid areas, the culvert is filled by plant growth, the culvert is closer to nature, the wariness of migratory animals to the culvert is reduced, and the ecological improvement effect is achieved.

This invention discloses an anisotropic sparse deconvolution enhancement method and system for ultrasound tumor image segmentation. The method includes: establishing a local convolution model for ultrasound RF images based on the anisotropic characteristics of the ultrasound xz imaging plane; constructing an axis-aligned elliptical symmetric anisotropic point spread function (PSF), whose lateral and axial spread scales are obtained through physical parameter conversion or data-driven methods; constructing an ultrasound sparse reconstruction objective function incorporating the anisotropic PSF, adding non-negativity constraints, introducing a weighted Hessian continuity term and an L1 sparse prior term in the xz plane direction, and optimizing the solution to obtain the sparse reconstruction result; using this result as input, employing an RL iterative deconvolution method based on the anisotropic PSF, and achieving image boundary sharpening and noise suppression through PSF flip kernel ratio iteration; inputting the enhanced image into a tumor segmentation network to complete training and inference, thereby achieving ultrasound tumor image segmentation.

Provided are a non-contact power supply method, a non-contact power supply system, a non-contact power supply device, a non-contact power reception device, a method for determining the position of a moving body, a system for determining the position of a moving body, and a moving body. A power supply device (2) provided outside a moving body is provided with: a power supply coil (22); and at least one power supply-side communication device (24) capable of communicating in accordance with the UWB wireless communication standard. A power receiving device (3) mounted on a moving body is provided with: a power receiving coil (32); and at least one power-receiving-side communication device (34) capable of communicating with the power-feeding-side communication device (24) in accordance with the UWB wireless communication standard. The control device (6) specifies a positional relationship between the power supply coil (22) and the power reception coil (32) on the basis of the communication, and performs, on the basis of the positional relationship, a process pertaining to non-contact power supply performed from the power supply coil (22) to the power reception coil (32) by means of an electromagnetic field.

A laundry dryer of the present disclosure may include: a first water container in which condensed water generated according to execution of a drying operation is stored; the drainage pump is driven by the BLDC motor; and a control unit for determining a rotational speed of the drainage pump. The control unit alternately operates and stops the drainage pump a preset number of times at a first rotational speed in response to a start of the bubble removal operation to remove bubbles from the condensed water in the first water container, and alternately operates and stops the drainage pump a preset number of times at a second rotational speed in response to an end of the bubble removal operation. A drainage operation of operating the drainage pump at a second rotational speed higher than the first rotational speed for a predetermined driving period of time is started.

The application provides a method, device and electronic equipment for image enhancement, wherein the method comprises: obtaining a to-be-processed image needing enhancement; determining a target low-frequency image of the to-be-processed image; determining an original high-frequency image of the to-be-processed image, removing a noise part in the original high-frequency image to generate a target high-frequency image of the to-be-processed image; and fusing the target low-frequency image and the target high-frequency image to generate an enhanced image. The method, device and electronic equipment for image enhancement provided by the embodiment of the application can remove the noise part in the original high-frequency image, thereby suppressing the noise in the target high-frequency image, reducing the influence of the noise, and not enhancing the noise in the target high-frequency image when fusing and enhancing the target high-frequency image. The target low-frequency image and the target high-frequency image are fused to realize image enhancement, which can well suppress the noise in the obtained enhanced image and effectively solve the problem that the enhanced image contains noise.

The utility model provides an LED (light-emitting diode) fish gathering lamp, which belongs to the technical field of illumination and comprises a lamp holder and a light-emitting component, the lamp holder comprises a first plane and a second plane, the first plane and the second plane are connected to form a bending angle, the light-emitting component comprises a first lamp group and a second lamp group, and the power of the first lamp group is smaller than that of the second lamp group. In order to achieve a better fish gathering effect, a plurality of fish gathering lamps are usually used in a combined mode, and due to the fact that the first lamp sets on the two sides of each fish gathering lamp adopt the LED light sources with relatively small power, a weak-illumination area, namely a so-called dark area, can be formed between the lamps when the fish gathering lamps are independently used, however, in the design, the LED light sources are used in a combined mode. The small-power first lamp sets on the side edges can form a light ray superposition effect between every two adjacent fish gathering lamps, so that the problem of insufficient illumination in a dark area is solved, the brightness distribution of the whole irradiation area is more uniform, and the fish gathering efficiency is improved.

The invention relates to a method for identifying a specific speaker from a group of speakers by a computer comprising a computer memory in which speech signatures are stored, each speech signature being associated with one of the speakers of the group, the method comprising the steps of: - acquiring a speech signal produced by the specific speaker (S41), - constructing a new speech signature from the speech signal, - comparing the new speech signature with at least one of the speech signatures stored in the computer memory, and - identifying the specific speaker according to the result of the comparison. According to the invention, before the step of constructing, a step is provided of generating a complete signal (S4) comprising the speech signal and at least one predetermined extension signal (S31, S32), and in the step of constructing, it is provided that the new speech signature is also constructed from each extension signal.

The application discloses a high-precision internal tooth grinding method for automobile gear internal tooth processing. The grinding method comprises the following steps: S1, starting a numerical control grinding machine, selecting a processing program and setting gear processing parameters; S2, the current tooth contact of a grinding wheel and a workpiece gear; S3, after the grinding of the current tooth is completed, the grinding wheel is separated from the workpiece gear; S4, the workpiece gear is divided into teeth, wherein the tooth division pulse number is equal to the basic pulse number plus the compensation pulse number; and S5, repeating S2, S3 and S4. When the grinding of the current tooth is completed and the next tooth is switched to, the decimal part of the tooth division pulse of the current tooth is taken as the compensation pulse, the compensation pulse is added to the basic pulse, so that the tooth division pulse of the next tooth is obtained, and the workpiece gear can be driven to rotate to the next tooth with high precision by the tooth division motor. The high-precision tooth division is realized, the transmission efficiency, the carrying capacity and the service life of the workpiece gear are improved, the noise level of the workpiece gear is reduced, and the increasingly strict requirements of the automobile industry on the gear grinding precision are met.

This utility model discloses an anti-rotation structure and its oil-free scroll compressor, comprising: a moving disc, on the outer circumferential side of which are at least three first protrusions; a housing, on the side of which adjacent to the moving disc are at least three second protrusions corresponding one-to-one with the first protrusions; and a flange eccentric sleeve connected to a first bearing installed in the second protrusions, wherein a cylindrical pin extending into the flange eccentric sleeve is installed in the first protrusion. This utility model has a simple structure. By changing the large clearance fit between the cylindrical pin and the ring sleeve to a small clearance fit between the cylindrical pin and the flange eccentric sleeve, the fit clearance is effectively reduced, significantly lowering the impact noise between the cylindrical pin and the mating parts. The small clearance fit enhances the stability of the moving pair, suppresses the overturning phenomenon of the moving disc caused by the large clearance, and improves the smoothness and reliability of the compressor operation. It combines the advantages of the pin sleeve anti-rotation structure and the three-crank structure.

This utility model relates to the field of noise control technology, and in particular to a transformer noise isolation device, comprising a housing, the housing being a square frame adapted to a transformer, an opening on the front side of the housing for inserting the transformer, and an internal cavity for storing the transformer inside the housing; it also includes a hinge, a soundproof door panel, and a locking assembly, etc. A soundproof door panel is hinged to one side of the front opening of the housing, and an inner groove adapted to the soundproof door panel is provided at the edge of the front opening of the housing. A locking assembly for locking the soundproof door panel is provided on the housing. This utility model, through the sound insulation layer inside the housing, the high-density multi-layer structure of the soundproof door panel, and the application of a rubber sheet, combined with a fastening component, ensures that the rubber sheet is pressed tightly when the soundproof door panel is closed, thereby minimizing noise leakage from the gap between the door panel and the housing, achieving the effect of isolating transformer noise within the housing.

This invention relates to a method and system for extracting wafer defect detection signals, comprising the following steps: circuit gain calibration; system dark noise calibration; PMT gain curve calibration; adaptive scanning parameter calibration; and wafer defect detection signal extraction. This invention solves the problems of system noise suppression and effective signal extraction in wafer defect detection systems, thereby improving defect detection sensitivity.

The utility model relates to the technical field of slide platform module, especially a mute type slide platform module. Including installation platform, installation platform one end bottom fixed mounting has mute motor, the output shaft of mute motor is through the installation platform and is fixedly connected with first transmission wheel, and the other end top of installation platform is rotatably connected with second transmission wheel, and first transmission wheel and second transmission wheel are connected through transmission belt, and the front side fixed mounting of transmission belt is located on the installation platform slide rail, and the front side of transmission belt is installed with the sliding block of slide rail sliding connection and the sliding block is adapted with slide rail, and the top fixed mounting of sliding block has installation slide platform. The utility model provides a kind of slide platform module, which can significantly reduce operating noise while ensuring motion accuracy and stability.

The application discloses an elastic cantilever beam, an optical fiber acceleration sensing device and system, and belongs to the technical field of optical fiber sensing. The elastic cantilever beam comprises a U-shaped beam body structure, the diameters of beam arms of the beam body structure gradually increase along the direction of an opening end of the beam body structure; a hollow part is arranged between the beam arms, the width of the hollow part gradually increases along the direction of the opening end of the beam body, and a plurality of beam body structures are arranged in parallel and connected through connecting parts to form a multi-period folding structure. The elastic cantilever beam provided by the application is used for acceleration signal sensing through a design of a width-gradually-changing multi-period folding cantilever beam. Under the same size, the deformation amount of the cantilever beam structure can be significantly increased compared with a conventional elastic cantilever beam when force is borne, so that the acceleration signal detection sensitivity of the sensing structure can be improved, and high-sensitivity and low-noise-level acceleration signal detection can be realized.

The application discloses a kind of wing-body fusion layout unmanned aerial vehicle's aerodynamic shape, it is related to low-altitude economic unmanned aerial vehicle high lift-drag ratio flight technical field, including wing-body part, the rear end of the upper surface of wing-body part is equipped with V-tail, engine is installed between the opposite surface of V-tail, the wing-body part with the V-tail is equipped with control surface part on;The lower surface of wing-body part is equipped with landing gear;The wing-body part includes inner wing and outer wing, the inner wing with the outer wing is symmetrically arranged, the edge of outer wing is equipped with wing tip;The leading edge sweep angle of wing-body part is 20 °, the trailing edge sweep angle of wing-body part is 17 °.The application discloses a kind of wing-body fusion layout unmanned aerial vehicle's aerodynamic shape, has better aerodynamic performance, stronger carrying capacity and lower noise;Appearance is simple, and cruise efficiency is high, suitable for engineering practical application.

The utility model relates to the field of transformer heat dissipation, and discloses a heat dissipation device for a transformer, which comprises a heat dissipation part detachably arranged on a transformer main body, the plurality of fan main bodies are arranged at the lower part in the shell; the plurality of heat pipes are uniformly arranged at the upper part in the shell; the radiating fins are mounted on the shell; and the plurality of telescopic heat dissipation fins are uniformly arranged on the two sides of the shell. By arranging the fan body, the heat pipe, the heat dissipation fins and the telescopic heat dissipation fins, efficient heat dissipation is achieved, the fan body accelerates heat transfer by forcing air to flow, the heat pipe efficiently conducts heat to reduce temperature difference, and the heat dissipation fins increase the contact area to strengthen convective heat exchange. The telescopic heat dissipation fins dynamically adjust the heat dissipation area to adapt to different working conditions and are particularly suitable for occasions with limited space and fluctuating heat dissipation requirements, efficient heat dissipation is guaranteed, meanwhile, low noise and a compact structure are maintained, and multiple requirements of modern high-tech equipment are met.

The application discloses a damping ventilation strip, a dry-type air-core reactor and a mounting method, and belongs to the technical field of dry-type air-core reactors. The damping ventilation strip comprises a first set of components and a second set of components, and the two are connected through a mortise and tenon structure. A gap is arranged between the first set of components and the second set of components, and the gap is filled with elastic polyurethane damping material. The mortise and tenon structure is used to replace the traditional plate structure ventilation strip design, so that the inner and outer encapsulation insulation layers can automatically adapt to micro-displacement when thermal expansion and cold contraction, and the insulation layer can be effectively prevented from cracking. The mortise gap is filled with high-elasticity damping material, further absorbing the deformation stress caused by thermal cycles, and improving the fatigue resistance of the encapsulation layer. Through the viscoelastic energy dissipation characteristics of the damping material, the mechanical resonance risk can be reduced, the optimized composite structure can block the vibration transmission path, reduce the rigid collision between the winding and the encapsulation layer, and significantly reduce the overall noise level.

The utility model provides a kind of noise reduction device of coiling machine, belong to coiling machine technical field, the noise reduction device of this coiling machine includes, sound insulation box, vibration isolation pedestal is fixedly connected to the lower end of sound insulation box, two sliding blocks are slidably connected in sound insulation box, first spring is equipped with multiple, multiple first spring is fixedly connected to the rear end of multiple sliding blocks, first cooperation rotator is equipped with multiple, multiple first cooperation rotator is fixedly connected to the upper end of multiple sliding blocks, by using the device, it solves the problem that traditional coiling machine cannot effectively reduce the vibration generated when equipment is running by increasing damping parts, and vibration is an important source of noise, if there is no damping part, the vibration when equipment is running will cause higher noise level.

The utility model provides a modularized replaceable concentrator heat dissipation structure, which belongs to the technical field of concentrators and comprises a main body provided with at least one heat pipe and at least one micro-channel. The two ends of the heat pipe are arranged near a heat source and at the position away from the heat source of the body respectively, the micro-channel is arranged near the heat end of the heat pipe, the heat pipe comprises an evaporation section, a condensation section and a heat insulation section, the evaporation section, the condensation section and the heat insulation section are connected through connecting pieces, the evaporation section is close to the heat source, and the condensation section is close to the heat source. The heat pipe comprises an evaporation section, a condensation section and a heat insulation section, the evaporation section is located at the position away from a heat source, the heat insulation section is located between the evaporation section and the condensation section, and the evaporation section, the condensation section and the heat insulation section of the heat pipe are of a continuous integrated structure. And the heat dissipation effect on a local hot spot area is not good.

Embodiments of the present disclosure relate to a semiconductor device and a method thereof. A semiconductor device includes a plurality of amplifiers configured to amplify an input phase-modulated signal and generate an output signal by summing respective output voltages, and an amplitude control circuit configured to output a selection signal for switching a number of amplifiers that are simultaneously controlled to an operating state among the plurality of amplifiers. A number of change levels in the number of amplifiers that are simultaneously controlled to the operating state is limited to a number of switching levels. The plurality of amplifiers includes at least one first amplifier configured to change a voltage level of the output signal by a change amount that is smaller than a unit amplitude obtained by dividing a maximum amplitude of the output signal by the number of switching levels, and at least one second amplifier configured to change the voltage level of the output signal by a change amount that is larger than the unit amplitude.

The invention discloses a wide-area GNSS time-frequency transmission method, device and equipment based on crowdsourcing RTK technology, and the method comprises the steps: building an unbiased single-difference ionosphere and troposphere delay correction model at a server side through the atmospheric correction information generated by a reference station and a user side in a convergence region on the basis of a single-difference ionosphere weighted observation model, and transmitting the unbiased single-difference ionosphere and troposphere delay correction model to a server side; atmospheric correction prior information is broadcasted to a time-frequency transmission user, and a crowdsourcing RTK single-difference observation model is constructed by fixing integer ambiguity through the atmospheric correction prior information; on the basis of a crowdsourcing RTK single-difference observation model, pseudo-range hardware delay is separated from clock difference parameters, only phase hardware delay is absorbed, a phase clock model is formed, and a corresponding random model is constructed. According to the invention, the stability of zero short baseline condition magnitude is realized, and the precision upper limit of the existing GNSS time transfer technology is broken through. Meanwhile, the advantages of the crowdsourcing RTK technology in the aspect of ionosphere space transfer are utilized, and the capability is expanded to a wide area range.

The utility model discloses a casting production processing is with foundry part shakeout device, it includes: lower support board, the upper surface fixed connection of lower support board has support rod, the upper end fixed connection of support rod has upper support board, and the two opposite faces of upper support board and lower support board all are fixedly connected with spring, and the two opposite faces of upper support board and lower support board all are fixedly connected with damper, and fixedly connected with broken case between spring, damper, the inner surface rotationally connected with broken roll of broken case, be provided with a plurality of honeycomb holes on broken case, the inner surface fixed connection of broken case has rubber plate, and the inner surface of lower support board is connected with the blanking box of passing through, and the blanking box is communicated with broken case, through above -mentioned parts, triple sound insulation effect, can effectively absorb, isolate and attenuate the noise of equipment when handling the noise of sand, make the noise level of working place and surrounding environment get the remarkable reduction, create more quiet, comfortable working environment.

The application discloses a Fourier photo-thermal gas detection device and method, and belongs to the technical field of gas detection. In view of the problems of narrow spectral response range, low power tolerance and the need for refrigeration of a light detector in an existing Fourier transform spectrum, a Fourier photo-thermal gas detection device is designed, a thermal light source is used as an excitation light source of absorption effect, the thermal light source is subjected to unified intensity modulation of wide spectrum light through an intensity modulation assembly and phase modulation through an interferometer assembly; the broadband light emitted after being subjected to double modulation is partially absorbed after acting on gas molecules, a quartz tuning fork light detector assembly effectively collects transmitted light, extracts resonance components in the transmitted light and converts the resonance components into electrical signals; the generated electrical signals are sequentially subjected to processing through a signal amplification assembly, a phase-sensitive demodulation assembly and a Fourier transform assembly, and composition discrimination and concentration inversion of a target gas are realized through the processed signals.

The application discloses a sawtooth optimization method based on t-distribution cumulative distribution and a disc saw preparation method. The disc saw preparation method is innovative in constructing a sawtooth profile by using a Student-T distribution CDF curve in view of the problems of stress concentration, loud noise and short service life of a traditional sawtooth, and controls tooth profile curvature through a degree of freedom v parameter to realize continuous and smooth transition from a tooth root to a tooth top. The method comprises the following steps: design parameter input, single-tooth reference profile generation, single-tooth profile discretization and coordinate conversion, tooth back and chip space construction, circular array replication, three-dimensional model generation and verification and manufacturing data output, and a tooth profile suitable for different requirements is obtained by adjusting the v value, and an optimal profile disc saw is output, so that the cutting noise of the disc saw is reduced, the tool life is prolonged, and the machining quality and efficiency are significantly improved.

The utility model discloses a hollow plate hot melting edge banding machine, which relates to the technical field of hot melting edge banding machines, and comprises an integral device main body, the integral device main body comprises a working table, the working table is positioned at the bottom of the integral device main body, and a support ring is arranged at the bottom of the periphery of the working table. A control mechanism is arranged on the short side face of the periphery of the workbench, a protection opening is formed in the top of the periphery of the workbench, a connecting sleeve is arranged at the bottom of the inner side of the workbench, a telescopic rod is movably connected to the top of the periphery of the connecting sleeve, and a protection mechanism is connected to the top of the periphery of the telescopic rod. The top of the periphery of the workbench is provided with a hot melting mechanism, the top of the periphery of the workbench is provided with a cutting mechanism, and through the arrangement of the workbench, the protection opening, the control mechanism, the protection mechanism, the connecting sleeve and the telescopic rod, the problems that a common hollow plate hot melting edge sealing machine is poor in safety function and noise reduction effect are effectively solved.