207results about How to "Reduce noise level" patented technology

The invention provides an unmanned aerial vehicle group spectrum resource allocation method and device based on cooperative spectrum sensing, and belongs to the technical field of wireless communication, and the method comprises the steps: constructing an unmanned aerial vehicle group dynamic spectrum access network, and creating a cooperative spectrum sensing unit; creating a federal deep reinforcement learning environment, and initializing task parameters and a reward function; the dynamic spectrum access user performs cooperative spectrum sensing to obtain available spectrum resources; training an unmanned aerial vehicle group dynamic spectrum access strategy model based on federated learning and deep reinforcement learning; and calling the trained strategy model to complete dynamic spectrum access of the unmanned aerial vehicle group. Dynamic spectrum access of the unmanned aerial vehicle group is carried out based on cooperative spectrum sensing, efficient utilization of spectrum resources among the unmanned aerial vehicle groups is realized, the problem of shortage of the spectrum resources of the unmanned aerial vehicle group is relieved, the channel utilization efficiency is improved, the interference level is reduced, and conversion of spectrum access of the unmanned aerial vehicle group to intelligence and precision is promoted.

The embodiment of the invention relates to the technical field of fans, and particularly discloses an active noise reduction fan which comprises a shell which is a portable shell, a cavity is formed in the shell, and an air inlet and an air outlet which are communicated with each other are formed in the two ends of the shell respectively; the fan assembly is arranged in the cavity and used for rotating to generate wind pressure so that air can be sucked in from the air inlet, passes through the cavity and then is blown out from the air outlet; the noise reduction assembly is arranged in the cavity and used for collecting noise signals inside and outside the cavity in real time when the fan assembly operates and sending out noise reduction signals according to the noise signals; wherein the noise reduction signal is a dynamic comprehensive noise signal including air inlet noise, air outlet noise, fan blade noise and / or motor noise. Through reasonable design of functions of the noise reduction assembly, active noise control is performed on the noise signal by using the noise reduction signal, and the noise level during operation of the fan is reduced.

The invention discloses a multi-optical-path ellipsoid cavity and secondary amplification resonance-based photoacoustic gas sensor and process, and relates to a photoacoustic gas sensor in the technical field of photoacoustic spectrum and trace gas detection. The device comprises an optical fiber collimator (1), an air hole (2), a laser incidence hole (3), a multi-optical-path ellipsoid reflection cavity (4), a curved beam waist resonance tube (5) and an electrical microphone (6), the optical fiber collimator (1), the laser incidence hole (3), the multi-optical-path ellipsoid reflection cavity (4), the curved beam waist resonance tube (5) and the electrical microphone (6) are connected in sequence; and the air holes (2) are respectively formed in two sides below the multi-optical-path ellipsoid reflection cavity (4). The invention has the following advantages and positive effects: the photoacoustic sensor has the advantages of high utilization rate, high sensitivity, low noise level and good system stability; the invention provides a new thought for a novel resonant high-sensitivity photoacoustic sensor, and has a huge application prospect in the field of photoacoustic spectrum gas detection.

The invention discloses a helicopter low-noise flight path design method and a related device, and relates to the technical field of helicopter path planning, and the method comprises the steps: adding the accumulated sound exposure level of a local or specific region into an evaluation function of a path optimization algorithm, and improving the weight of the accumulated sound exposure level. Therefore, a path capable of effectively reducing the noise level of the target area or the whole area is selected, and the influence of noise on the surrounding environment is reduced to the maximum extent.

The invention relates to the technical field of computer aided design, in particular to a fan model generation method and system. The method comprises the following steps: acquiring basic design parameters and constraint conditions of a fan, and performing fan model simulation generation and aerodynamics analogue simulation to generate aerodynamics simulation fields corresponding to different fan models; performing fan blade power curvature and airflow vibration evaluation analysis on the aerodynamic simulation fields corresponding to the different fan models, and performing fan airflow efficiency calculation at the same time to obtain fan air flow efficiency corresponding to the different fan models; performing operation acoustic noise evaluation analysis and performance curve simulation analysis on the corresponding fan three-dimensional models to generate airflow efficiency-noise performance curves corresponding to different fan models; a fan optimization model is generated by obtaining a corresponding fan constraint optimization target and performing time sequence energy efficiency ratio optimization design. The design effect and efficiency of the fan model can be improved.

The invention provides a box body structure and a hybrid power integrated system comprising the same, and the box body structure is characterized in that a box body space is divided into a hot space area and a cold space area, and high-temperature equipment is placed in the hot space area; equipment with low temperature (low heat productivity) can be placed in the cold space area, heat isolation can be guaranteed through the heat insulation layer, high temperature of the hot space area is prevented from being conducted to the cold space area, the environment temperature of the cold space area is prevented from being affected, and the low-temperature equipment such as a motor placed in the cold space area is further prevented from being affected. The material of the box body is preferably a heat dissipation or heat conduction material; the surface of each wall plate of the box body can be provided with structures such as heat dissipation teeth or heat dissipation grids, so that the heat dissipation area is increased, the strength of the box body is improved, and the weight of the box body is reduced. Sound insulation and / or heat transfer materials are further arranged on the inner side walls of the wall plates of the box body, and sound insulation and heat transfer materials are also arranged at the air inlets and the air outlets of all the heat spaces, so that sound insulation and heat dissipation are facilitated.

The utility model discloses a single-photon detector, which comprises a controller, a bias voltage generating circuit, a refrigeration temperature control circuit, a gating voltage generating circuit, an avalanche signal extraction circuit and an avalanche photodiode (APD) refrigeration box, and is characterized in that one end of the bias voltage generating circuit, one end of the gating voltage generating circuit and one end of the avalanche signal extraction circuit are connected to the controller; one end of the refrigeration temperature control circuit is connected to a TEC of the APD refrigeration box, the other end of the refrigeration temperature control circuit is connected to the controller, the other end of the avalanche signal extraction circuit is connected to an anode of an APD in the APD refrigeration box through an alternating current coupling capacitor C2, the anode of the APD is grounded through a sampling resistor R2, the other end of the bias voltage generation circuit is connected to a cathode of the APD through a resistor R1, and the APD refrigeration box is connected to the APD refrigeration box. And the other end of the gating voltage generation circuit is connected to the cathode of the APD through an alternating current coupling capacitor C1. According to the technical scheme of the utility model, the passive quenching of the free operation working mode is realized, the dead time processing circuit is simplified, and the noise level of the detector is reduced.

The utility model discloses a pressure regulating silencer with a deslagging function, which comprises a silencing pipe, a pressure regulating sleeve sleeved on the silencing pipe and a silencing outer sleeve sleeved outside the pressure regulating sleeve, a silencing chamber is formed between the silencing pipe and the silencing outer sleeve, a deslagging silencing hole communicated with the silencing chamber is arranged on the silencing pipe, and a deslagging hole is arranged on the silencing outer sleeve. The residue discharging holes are formed in the silencing outer sleeve, so that independent residue discharging paths are formed among the residue discharging silencing holes in the silencing pipe, the silencing chamber between the silencing pipe and the silencing outer sleeve and the residue discharging holes in the silencing outer sleeve, and residues do not need to enter the nail fixing device any more. The nail fixing device effectively prevents the residues from entering the nail fixing device to cause corrosion, jamming and other damage to key components (such as a firing pin assembly), greatly prolongs the service life of related equipment components, reduces the maintenance frequency and cost caused by component damage, does not need to disassemble and assemble the nail fixing device main body to clean the residues in the nail fixing device, and improves the working efficiency. And the overall reliability and stability of the equipment are improved.

The utility model discloses high-speed ceramic chip feeding equipment which comprises a ceramic chip feeding mechanism, an angle recognition mechanism and a sorting and positioning mechanism. The ceramic chip feeding mechanism comprises a ceramic chip feeding vibration disc, a feeding track and a linear vibrator; the angle identification mechanism is used for carrying out positioning identification and angle signal output on the ceramic workpieces on the feeding track; the sorting and positioning mechanism comprises a rotary arm assembly driven by a servo mechanism and a rotary suction assembly connected with the rotary arm assembly; the servo mechanism can receive angle signals output by the angle recognition mechanism and drive the rotary arm assembly and the rotary material suction assembly to work. According to the utility model, through the cooperative use of the automatic ceramic chip feeding mechanism, the sorting and positioning mechanism and the angle identification mechanism, quick and accurate ceramic chip workpiece feeding and positioning are realized, so that the overall efficiency of a production line is improved, and meanwhile, errors caused by manual operation and human intervention are reduced; and the angle identification mechanism and the sorting positioning mechanism are matched to remarkably improve the precision and the stability.

The invention discloses a geomagnetic anomaly data stable downward continuation method based on an SRGAN deep learning network, and belongs to the field of geophysical magnetic field data continuation. According to the invention, in combination with the continuation characteristic of geomagnetic anomaly data, a CBAM space attention mechanism module is added to improve the spatial perception capability of a network model to the magnetic anomaly data, and in combination with the characteristic that the downward continuation of potential field data can amplify the noise generated by a high-frequency signal; and the deep learning model is combined with adaptive threshold multiple wavelet transform to suppress noise data so as to further improve the continuation precision. In order to enable a model to fully learn detailed information of geomagnetic anomaly data, a training data set construction method combining a Kriging super-resolution algorithm with a sliding subarea mode is provided. By designing and synthesizing a simulation model experiment and comparing actual measurement data with other three algorithms, the model is highest in calculation precision and best in magnetic anomaly detail information recovery.

The invention relates to a fast-response closed-loop micro-thrust measurement method and device based on dynamic thrust inversion. The method comprises the following steps of obtaining kinetic equation parameters of a measurement system; in each control period, calculating a control quantity, and taking the control quantity as a standard force; in the current control period, based on displacement data obtained through measurement of the measurement system and the kinetic equation parameters, the resultant force of the previous control period is calculated through a kinetic inversion algorithm; on the basis of the difference between the standard force of the previous control period and the resultant force, the thrust to be measured of the previous control period is obtained through calculation; and performing low-pass filtering processing on the thrust to be measured to obtain a final result. Compared with the prior art, the method can improve the measurement response speed on the premise of not increasing the noise level.

The invention belongs to the technical field of signal processing, and particularly relates to an under-snapshot 2D-MUSIC direction finding method based on spatial translation invariance. According to the method, the space translation invariant characteristic of a uniform linear array or a uniform planar array is utilized, a calculation method of a forward and backward space-time cross-correlation function is provided, a pseudo covariance matrix is constructed by using the space-time cross-correlation function based on the Hermitian-block Toeplitz characteristic of a signal ideal covariance matrix, then a MUSIC spatial spectrum is constructed, and the wave direction is extracted. Compared with a traditional 2D-MUSIC algorithm, the method still can maintain the high-precision angle estimation capability under the condition that the number of snapshots is limited, and does not greatly improve the calculation amount. Compared with a spatial smoothing MUSIC algorithm, the method does not need to divide sub-arrays, fully utilizes the full array aperture, and avoids the loss of resolution.

The invention relates to the technical field of epidermal signal acquisition equipment, and provides an ionization-electricity double-layer structure epidermal electrode and a preparation method and application thereof.The ionization-electricity double-layer structure epidermal electrode comprises an electronic conducting layer, the electronic conducting layer is provided with a concave-convex first surface, an ion conducting layer is arranged on the first surface of the electronic conducting layer, and the ion conducting layer is arranged on the second surface of the electronic conducting layer. And a concave-convex ionization-electricity interface is formed between the electron conducting layer and the ion conducting layer. According to the ionization-electricity double-layer structure skin electrode, the ionization-electricity coupling efficiency is improved, the interface impedance is reduced, then the baseline noise level of electrophysiological signals is reduced, and high-fidelity electrophysiological signal collection is achieved.

The invention discloses a Fourier photoacoustic gas detection device and method, and belongs to the technical field of gas detection. In order to solve the problems that the anti-interference capability of an existing Fourier transform photoacoustic spectrum on a sound signal is limited and the detection sensitivity is low, the Fourier photoacoustic gas detection device is designed, and a super-continuum spectrum broadband light source is used as an excitation light source of a photoacoustic effect; uniform intensity modulation of wide-spectrum light is achieved through the intensity modulation assembly, and phase modulation is achieved through the interferometer assembly. The broadband interference light emitted through double modulation acts with gas molecules to generate wide-spectrum mixed sound waves, and the quartz tuning fork sound measurement assembly extracts resonance components in the wide-spectrum mixed sound waves and converts the resonance components into electrical signals; the generated electrical signal is processed by the signal amplification assembly, the phase-sensitive demodulation assembly and the Fourier transform assembly in sequence, and component discrimination and concentration inversion of the target gas are realized by the processed signal.

The invention discloses an offset cancellation circuit, which comprises a signal conditioning unit used for processing an input signal and outputting a first current signal, an offset cancellation unit used for removing offset current in the first current signal and outputting a second current signal, and a signal processing unit used for processing the second current signal and eliminating offset voltage, the detuning elimination unit specifically comprises a chopper, a digital analog converter, a successive approximation register logic module and a comparator which are connected in sequence, and through multi-level detuning elimination, the precision of the whole circuit is improved, the processing capacity for weak signals is enhanced, the anti-interference capacity is improved, and noise is reduced; the method ensures the stability of long-time operation, and has a wide application prospect in the field of high-precision signal processing.

The invention provides an information processing method and device of a phased array and electronic equipment. The information processing method comprises the following steps: determining an actual beam width and maximum sidelobe information according to a target directional diagram of a phased array of a target beam at a target scanning angle; wherein the target directional diagram is determined according to the on-off state of a target array element in the phased array; calculating a corresponding target value according to the deviation between the target beam width and the actual beam width and the maximum sidelobe information; determining an optimal target value in a plurality of target values corresponding to different switching states of the target array element; and determining the on-off state of each array element of the target wave beam at the target scanning angle according to the on-off state of the target array element corresponding to the optimal target value. According to the invention, constraints are applied to the beam width and the maximum sidelobe information of the beam, so that the interference level between same-frequency beams can be reduced essentially.

The invention relates to the technical field of transformer pouring tanks, and particularly discloses a vacuum pouring tank for pouring a dry-type transformer, the vacuum pouring tank comprises a tank body, mounting frames are symmetrically and fixedly connected to the outer surfaces of the two sides of the tank body, and a vacuum gauge is fixedly mounted on the side surface of the tank body; and a vacuum pipe is fixedly connected to the outer surface of the side, close to the vacuum gauge, of the tank body in a penetrating mode and arranged on the inner side of the mounting frame. When the interior of the tank body is in a vacuum state, the interior of the tank body is in a negative pressure state, and at the moment, the inner wall of the tank body is subjected to corresponding extrusion force under the suction action of negative pressure; the bottom plate and the top plate are fixedly mounted on the upper surface and the lower surface of the interior of the tank body, so that the two side surfaces of the tank body can be supported through the bottom plate and the top plate when the interior of the tank body is in a negative pressure state, the possibility of deformation of the tank body is greatly reduced, and the vacuum state in the tank body is protected; and the situation of air leakage caused by damage due to deformation of the tank body in a negative pressure state for a long time is avoided.

The invention discloses an electromagnetic interference suppression circuit and method and a power adapter, and belongs to the technical field of power adapters, the electromagnetic interference suppression circuit comprises a common mode inductor, a first end of the common mode inductor is connected to a live wire input end of the power adapter, a second end of the common mode inductor is connected to a null line input end of the power adapter, and the common mode inductor is used for generating magnetic flux; common-mode noise of the live line input end and the zero line input end of the power adapter is suppressed; the differential mode filter is connected with the common mode inductor in parallel and is used for suppressing differential mode noise between the live wire and the zero wire; and the first end of the grounding resistor is connected with the zero line input end of the power adapter, the second end of the grounding resistor is grounded, and the grounding resistor is used for providing a low-impedance path and guiding an electromagnetic interference signal passing through the input end of the power adapter to the ground. Through the combined action of the common mode inductor, the differential mode filter and the grounding resistor, the electromagnetic compatibility of the power adapter can be effectively improved, and the electromagnetic interference is reduced.

The utility model belongs to the technical field of underwater bionic robots, and discloses a bionic manta ray underwater monitoring robot, which comprises a main body and bionic wings, each bionic wing comprises a differential mechanism support, a passive fin transmission shaft and a silica gel passive wing, the differential mechanism support is provided with a differential mechanism and a rotary steering engine, and the rotary steering engine is provided with a rotary shaft. The bionic wings are connected with the main body through swing rods, a stepping motor cabin is arranged in the main body, a stepping motor is arranged in the stepping motor cabin, and an output shaft of the stepping motor is connected with the swing rods through a transmission mechanism, controls the bionic wings to swing up and down through the swing rods and provides advancing power. And the differential mechanism and the rotary steering engine are respectively connected with the silica gel passive wing, drive the silica gel passive wing to rotate and control steering. According to the utility model, active and passive motion control is realized, the influence on the marine ecological environment is small, and various monitoring operation modes are realized underwater so as to adapt to different operation environments.

The invention relates to a projector heat dissipation and noise reduction method and device, equipment and a storage medium, and the method comprises the steps: obtaining the internal structure data and environment temperature information of a projector, and carrying out the thermal simulation analysis, and obtaining a corresponding thermal distribution diagram; acquiring real-time temperature data of the projector, and performing heat dissipation demand calculation on the real-time temperature data and the heat distribution diagram to obtain a corresponding real-time heat dissipation demand; acquiring light source output data and processor performance data of the projector, and predicting a real-time heat dissipation demand to obtain a corresponding heat dissipation trend; performing heat dissipation planning analysis on the real-time heat dissipation demand and the heat dissipation trend to obtain a corresponding initial heat dissipation control scheme; performing high-temperature identification on the real-time temperature data through a preset nonlinear dynamic model, and performing adjustment in combination with a heat dissipation trend to obtain a corresponding performance adjustment strategy; and analyzing the initial heat dissipation control scheme and the performance adjustment strategy to obtain a corresponding global heat dissipation noise reduction strategy. According to the invention, intelligence and refinement of heat dissipation control of the projector can be realized.

The invention belongs to the technical field of channel allocation, and particularly relates to a full-duplex D2D (Device-to-Device) communication channel allocation algorithm based on novel graph coloring, which comprises the following steps of: constructing a bidirectional interference graph containing all potential interference links; expressing a channel allocation problem as an interference minimization graph coloring problem; distributing N independent communication channels for all cellular user equipment; a greedy graph coloring algorithm is adopted, and single colors are distributed to the D2D vertexes which are not colored one by one; if the number of D2D vertexes in a certain color set is increased or decreased, the interference level is evaluated again; and traversing each color, allocating a single color to the remaining D2D vertexes, terminating the algorithm after all D2D vertexes are traversed, and generating a conflict-free channel allocation scheme. According to the invention, the channel allocation can be optimized, and the interference in the system can be effectively managed and reduced, so that the access rate of the user and the overall spectrum efficiency are improved.

The invention belongs to the technical field of unmanned aerial vehicles, and provides a motor and duct integrated device, an unmanned aerial vehicle and a test method.The motor and duct integrated device comprises a duct, a rotating ring, a rotor wing and a rim motor; the rim motor is mounted in the duct, and a magnetic flux path is parallel to the axis of the duct; the multiple rotor wings are installed on the inner surface of the rotating ring and located on the inner side of the duct. The rotating ring is fixedly connected with the inner surface of a rotor of the rim motor. The rim motor is installed in the duct, and the magnetic flux path is parallel to the axis of the duct, so that the installation space of the system is reduced, the power density of the system is improved, and compared with a traditional radial magnetic flux motor, the weight and the size of the motor are reduced.

The invention relates to mechanical and electrical integrated machining equipment for a Ruban mortise and tenon wood structure of an ancient building, which can automatically adjust cutting parameters according to the hardness of wood, reduce tool wear and unnecessary load while improving the machining speed and efficiency, and improve the machining efficiency by monitoring and adjusting the parallelism deviation between a cutterhead and a working platform in real time. The consistency of machining precision and product quality is ensured, the interruption time in the machining process is shortened, vibration generated when the cutter head rotates at a high speed is further reduced through dynamic balance detection and adjustment, the stability of the machining process is improved, the service life of the cutter is prolonged, the stability of the cutter in the machining process is ensured through a clamping force self-adjusting mechanism, vibration is reduced, and the machining efficiency is improved. In addition, the cooling and dust removing system effectively removes wood chips and dust generated in the machining process, the working environment is improved, the equipment maintenance cost is reduced, the service life of equipment is prolonged, and the production efficiency and the machining precision are improved through the comprehensive measures.

The invention discloses a noise reduction device and a noise reduction method for an exhaust pipe of a magnetic levitation vacuum pump. The noise reduction device comprises a gradual noise reduction pipe, one end of the gradual noise reduction pipe is connected to the exhaust pipe through an air intake straight pipe, and the other end is connected to an air outlet straight pipe; along the exhaust flow direction, the diameter of the gradual noise reduction pipe gradually increases, a diverter noise reduction plate is provided in the gradual noise reduction pipe along the axial direction, the diverter noise reduction plate divides the gradual noise reduction pipe into two independent noise reduction channels, and a plurality of guide vanes are provided on the surface of the diverter noise reduction plate on a side close to the air intake straight pipe along the air intake direction; the gradual noise reduction pipe of the invention uses the diverter noise reduction plate to divide the pipe into two noise reduction channels, sound energy can be effectively dissipated in the channels, air flow pulsation is small, thereby reducing exhaust noise; the arc structure of the guide vane effectively reduces the original BPF noise level, reduces the secondary harmonic, makes the noise broadband, and improves the noise reduction effect.

The invention discloses an electric vehicle charging load prediction method and system considering data cleaning, and the method comprises the steps: collecting historical electric vehicle load related data and historical electric vehicle load data, and extracting electric vehicle load related features; performing normalization processing on the collected data, cleaning the normalized electric vehicle load data, and forming a training data set by using the normalized electric vehicle load related characteristics and the cleaned data; establishing a load prediction model based on a CNN-GRU convolutional neural network-gating cycle unit; training a load prediction model by using the training data set; and acquiring related characteristics of the electric vehicle load in real time, inputting the related characteristics into the trained load prediction model, and predicting the short-term charging load of the electric vehicle in real time. The electric vehicle charging load prediction method has the outstanding advantages that the electric vehicle charging load prediction result is good, the model practicability is high, and complex factors influencing electric vehicle charging load prediction are fully considered.

The invention belongs to the technical field of rocket launching, and particularly relates to a rocket fairing noise reduction method and device and a storage medium. The method comprises the following steps: acquiring a noise signal; performing spectral analysis on the acquired noise signal by adopting fast Fourier transform to obtain a frequency domain signal, the frequency domain signal comprising amplitude and phase information under different frequency components; setting a boundary of each frequency band, extracting feature information of each frequency band, and extracting noise components of each frequency band according to the feature information of each frequency band; the noise reduction strategy of each frequency band is optimized through an artificial bee colony algorithm, and the optimal frequency and amplitude of the anti-phase sound waves of each frequency band are obtained; and according to the output of the artificial bee colony algorithm, anti-phase sound waves are generated, and active noise reduction is carried out on the fairing. According to the method, the overall noise reduction performance of the fairing can be improved, the response speed is high, the requirement for computing resources is low, and the method is suitable for scenes with strict requirements for time and resources in rocket launching scenes.

The invention discloses a construction engineering elevator shaft silencing structure, and relates to the technical field of elevator shaft silencing. The constructional engineering elevator shaft mute structure comprises a concrete bottom plate, three vertically-installed concrete heat preservation sandwich plates are fixedly installed on the concrete bottom plate, the three concrete heat preservation sandwich plates form a U shape, and a concrete top plate is fixedly installed at the top ends of the three concrete heat preservation sandwich plates; wherein a concrete cross beam is fixedly installed between the two concrete heat preservation sandwich plates, a concrete frame is fixedly installed on the concrete cross beam, a prefabricated opening is formed in the concrete frame, the concrete frame is used for being installed on an elevator door through the prefabricated opening, and the concrete heat preservation sandwich plates are provided with sound insulation assemblies. And noise in the elevator shaft is reduced through the sound insulation assembly. Through cooperative use of the sound insulation assembly, the vibration reduction assembly and the silencing assembly, the noise level in the elevator shaft is effectively reduced, the living and using comfort of a building is improved, and meanwhile vibration and airflow noise caused by elevator operation are effectively controlled.

The invention discloses a fan blade cleaning device for a wind driven generator, and particularly relates to the technical field of wind power generation. And by arranging the rotating mechanism, sustainable utilization of energy is achieved, the wind energy utilization efficiency is improved, the noise level is reduced, and interference to the environment is reduced. By arranging the buffer mechanism, the generator is prevented from being damaged due to too high rotating speed, and the effect of effectively reducing the rotating speed of the generator according to wind power in time is achieved. And by arranging the cleaning mechanism, dirt and insects on the fan blades of the wind driven generator can be cleaned up, so that the efficiency of the fan blades is recovered, and the performance of the wind driven generator is improved. And by arranging the spraying mechanism, liquid can be uniformly sprayed on the surfaces of the blades through a spraying device, and dirt and dust are thoroughly removed. And a scraper mechanism is arranged, and a scraper is in contact with the surface of the fan blade to scrape dust on the surface of the fan blade, so that the scraping cleanliness of the fan blade is improved.

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.