16results about How to "Effective noise reduction" patented technology

The invention relates to a parameter sensing and fault processing method for an electric energy measuring instrument verification system, in particular to a multi-parameter sensing and fault processing method for an automatic verification system, which is characterized by comprising the following steps of: collecting and analyzing signals, acquiring audio and video information of a verification line body by utilizing inspection equipment, and designing important inspection points and inspection periods. Fault information of a verification line body is collected in real time, classification and installation of sensors are carried out, and a sensor network is formed; accumulating a fault knowledge base and marking fault marks, and establishing an assembly line panoramic intelligent sensing model by using a digital twinning technology; carrying out fusion analysis on a multi-parameter sensing model taking digital twinning as a carrier, and carrying out principal component analysis on fault influence factors; performing data noise reduction and dimension reduction processing by using a principal component analysis algorithm; carrying out target detection by adopting an ensemble learning algorithm; and a time sequence event model of a self-attention mechanism is introduced to carry out fault early warning and defect elimination guidance, and the potential fault occurrence probability of the key equipment is predicted.

The invention discloses an airborne equipment acceleration monitoring and outrange control method and system, which cover acceleration monitoring of the whole flight process, combine dynamic scene modeling and a hierarchical response mechanism, and can timely identify an abnormal state and start corresponding measures. Through system calibration, noise identification, dynamic filtering, mistaken touch prevention parameter setting and a collision algorithm, false alarm and missing alarm caused by vibration, impact or sensor faults are effectively avoided, double modes of automatic collision detection alarm and manual triggering alarm are supported, the flexibility and safety of the system are improved, and once it is confirmed that the system is in distress, the system is safe and reliable. Rescue signals including position, time, height and other key information can be automatically sent, and the emergency response time is remarkably shortened.

The utility model discloses a low -noisy rear wheel cover assembly, including wheel cover main part, flexible connecting piece and shock attenuation subassembly. The wheel cover main part surface is equipped with a plurality of locating block for installing flexible connecting piece, and flexible connecting piece includes the screw bushing pipe and the ring seat fixed in the inboard of locating block, and the inboard of ring seat is equipped with a plurality of lug and screw bushing pipe fixed connection, realizes flexible support and radial limit. Shock attenuation subassembly includes the pasting box, props foot and the vibration piece fixed in the end of props foot, and the vibration piece is fixed in the inboard of pasting box through props foot, and can set up different size and slot structure to realize the multi -frequency vibration stop. This structure can effectively absorb the multi -frequency vibration in the vehicle driving process, reduces the wheel cover resonance noise, and promotes the stability and the comfort of whole car driving.

The utility model relates to the technical field of dental plates, and discloses a noise reduction type crusher wear-resistant dental plate, which comprises a rack for loading and supporting and a fixed dental plate body, the upper surface of the rack is fixedly connected with a noise reduction processing assembly for cushioning and noise reduction, the top of the noise reduction processing assembly is fixedly connected with the fixed dental plate body, and the fixed dental plate body is fixedly connected with the rack. Outer sleeves are evenly and fixedly connected to the four corners of the upper surface of the rack, elastic supporting assemblies with one ends extending out of the outer sleeves are fixedly connected to the interiors of the outer sleeves and used for conducting deformable supporting treatment, and the tops of the elastic supporting assemblies are fixedly connected with the fixed tooth plate body. According to the noise reduction type crusher wear-resistant tooth plate, by arranging the effective damping assembly, vibration force generated during crushing impact can be effectively eliminated, certain elastic deformation capacity is achieved during impact, the vibration influence caused by impact force can be further relieved, noise generated during operation is effectively eliminated, and the service life of a crusher is prolonged. The purpose of effectively reducing noise is achieved.

The utility model provides a medical oxygen generator's noise reduction device, the medical oxygen generator's noise reduction device includes Y-type air inlet pipe, Y-type air inlet pipe includes straight pipe portion and Y-type pipe portion, straight pipe portion one end is connected with the second slip pipe of Y-type pipe portion, straight pipe portion one end is equipped with the first slip pipe that connects with the Y-type pipe portion, the first slip pipe is equipped with the second slip pipe, the second slip pipe is equipped with the second slip pipe, and the second slip pipe is equipped with the second slip pipe. The second sliding pipe is sleeved with the first sliding pipe in a sliding mode, a buffering corrugated pipe part is integrally formed on the first clamping ring, and the other end of the buffering corrugated pipe part is connected with the second clamping ring on the straight pipe part. When airflow enters and gathers along the two pipe ends of the Y-shaped pipe part, the second sliding pipe and the first sliding pipe can slide when the airflow gathers and impacts, and the buffering corrugated pipe part can play a role in damping and buffering, so that vibration noise generated by airflow gathering is reduced, and the service life of the air conditioner is prolonged. A plurality of lubricating oil storage annular grooves used for being filled with solid lubricating oil are formed in the inner wall of the first sliding pipe, so that sliding between the first sliding pipe and the second sliding pipe is smoother, and noise generated by sliding is avoided.

The utility model relates to a resistance piece type pipeline silencer, which belongs to the technical field of pipeline silencers, and comprises a pipeline and a flange, the pipeline is internally provided with a dismounting mechanism, the dismounting mechanism comprises a mounting ring fixedly arranged on the inner circumferential wall of the pipeline, and the outer wall of the left side of the mounting ring is fixedly provided with an air guide seat; and an air guide pipe is fixedly mounted on the outer wall of the right side of the mounting ring. According to the resistance piece type pipeline silencer, gas is bound and guided through the gas guide seat and the mounting ring, the influence of water vapor on the glass wool felt is reduced through the effect of the gas guide plate, meanwhile, the interior of a pipeline can be effectively subjected to silencing treatment, the glass wool felt is conveniently mounted through the effect of the gas guide pipe, the fixing ring, the clamping seat and the sealing ring, and the practicability is high. The glass wool felt is convenient to disassemble and assemble, the sealing ring is convenient to mount through the action of the mounting seat, the fixing seat and the bolt, and the silencing effect on the pipeline is improved through the action of the rubber ring and the mounting rod.

The invention relates to the technical field of intelligent brain waves, and particularly provides a brain wave acquisition and analysis method for sleep staging, which comprises the following steps: S1, acquiring brain wave initial data, and sequentially carrying out downsampling processing, scaling processing, Gaussian filtering processing, Gaussian smoothing processing and data overlapping filling processing on the initial data; s2, carrying out labeling operation on the processed brain wave data; s3, collecting a human body sleep image, and judging the human body sleep time in combination with the brain wave data; s4, acquiring a time point of deep sleep of the human body; s5, building a sleep neural network to judge the sleep state of the human body; according to the method, data collection and processing and label creation are completed through the steps S1-S5, and then a sleep neural network of a user is trained by using a data set and the label, so that the judgment of the sleep stage of the human body by using a machine is completed, the accuracy of sleep stage division is improved, effective sleep information is identified, and the monitoring of the whole sleep process is realized.

The application relates to the technical field of toothbrush control, and discloses an electric toothbrush, which comprises a handle cylinder, a first machine core frame and a second machine core frame which are detachably connected and are installed in the handle cylinder, a sound wave motor is arranged between the first machine core frame and the second machine core frame, a brush head assembly is clamped on a driving shaft of the sound wave motor, and a control board is arranged on one side of the first machine core frame; a switch board is arranged on one side of the second machine core frame, a micro switch for sensing the pressure of the brush head assembly is arranged on the switch board, a guide rail is arranged on the side wall of the first machine core frame, a sliding groove which is in sliding cooperation with the guide rail is arranged in the handle cylinder, a convex point is arranged on the guide rail, the first machine core frame is in interference cooperation with the handle cylinder through the convex point, a shock-absorbing ring is sleeved with one end of the first machine core frame and the second machine core frame, and the shock-absorbing ring is in abutment with the inner wall of the handle cylinder. The application simplifies the pressure sensing structure, can reduce the manufacturing cost of the electric toothbrush, can effectively reduce the noise of the electric toothbrush due to the shock-absorbing and positioning effects of the shock-absorbing ring, and enhances the use experience of users.

The present application relates to air conditioning technical field, specifically disclose a kind of vehicle vibration control method and air conditioner based on parking air conditioner, to solve the problem of large noise of existing top parking air conditioner.To this end, the parking air conditioner of the present application is arranged on the top of the vehicle, and the air outlet of the parking air conditioner is communicated with the interior of the vehicle, and the control method comprises the following steps: obtaining the vibration data of the top of the vehicle;Obtain the operating parameters of the parking air conditioner;According to the vibration data and operating parameters, it is judged whether the condition of needing to suppress vibration is met;When the condition of needing to suppress vibration is met, adjust the operating parameters of the parking air conditioner.In the present application, according to the vibration data of the top of the vehicle and the operating parameters of the parking air conditioner, the adjustment of the operating parameters of the parking air conditioner is completed, so as to reduce the vibration amplitude of the top of the vehicle or avoid the resonance frequency between the top of the vehicle and the parking air conditioner, realize the effective noise reduction of the vehicle, and improve the user experience.

The utility model discloses water body aeration equipment for groundwater remediation, which comprises a noise reduction component, a water body aeration component and a water body aeration component, the noise reduction component comprises an inner cavity, noise reduction filling cotton and a protective reinforcing rod, and the inner cavity is arranged in a shell of a gas storage tank and a shell of an aeration machine body; a cavity body of the inner cavity is filled with noise reduction filling cotton; the storage assembly comprises side supporting plates, a rotating shaft, a hose and a rotating joint, the two side supporting plates are relatively fixed on the side wall of the aerator body, and the rotating shaft is movably mounted in the middle of the side supporting plates; a hose is wound on the surface of the rotating shaft; one end of the hose is communicated with one end of the communicating pipe through the rotary joint; according to the aeration equipment, through the arrangement of the storage assembly, the hose can be collected, and the problem that the hose is wound and knotted in the use process due to the fact that the hose is too long is avoided; and the noise reduction assembly is arranged in the shell of the air storage tank and the aerator body, so that the noise of the air storage tank and the aerator body can be effectively reduced during use, and the phenomenon of high noise is avoided.

The utility model provides an air inlet panel and an exhaust fume collecting hood and a range hood comprising the air inlet panel, the air inlet panel comprises a noise reduction part, the noise reduction part is arranged in the middle area of the air inlet panel, and the noise reduction part is flat and is arranged perpendicular to the air inlet direction of the air inlet panel; the air inlet is annularly formed in the peripheral side of the noise reduction part, and the air inlet is formed close to the edge of the air inlet panel; and the connecting piece is arranged in the air inlet, one end of the connecting piece is connected with the side part of the noise reduction part, and the other end of the connecting piece is connected with the inner wall of the air inlet. By arranging the noise reduction part and annularly forming the air inlet in the peripheral side of the noise reduction part, the arrangement position of a traditional air inlet is changed, and the suction force distribution range is expanded, so that the oil fume absorption effect of the air inlet on the edge of the air inlet panel can be correspondingly improved, and the noise reduction part can absorb noise; and the noise is prevented from radiating outwards from the air inlet panel to influence the use experience of a user.

The utility model relates to the field of range hoods, and provides a sound absorption unit, a sound absorption module and a range hood. The sound absorption unit comprises a 1 / 4 wavelength pipe, a sound absorption cavity is formed in the 1 / 4 wavelength pipe, one end of the 1 / 4 wavelength pipe is open, the other end of the 1 / 4 wavelength pipe is closed, a plurality of small holes communicated with the sound absorption cavity and the outside are formed in the open end, and the width of each small hole is larger than 2 mm. According to the sound absorption unit provided by the utility model, the plurality of small holes are formed in the 1 / 4 wavelength tube, and the width of each small hole is greater than 2mm, so that the sound absorption unit can effectively reduce noise, meanwhile, the structural volume of the sound absorption unit is smaller, oil stains can be prevented from blocking the small holes, and the noise reduction failure of the sound absorption unit is avoided.

The invention relates to the technical field of axial flow pumps, and discloses a multi-working-condition adaptive fluorine material axial flow pump which comprises a guide vane body and a horn tube which are fixed to each other, an upper fluorine material sleeve body is arranged on the inner wall of the guide vane body, a lower fluorine material sleeve body is arranged on the inner wall of the horn tube, and a fluorine material clamping sleeve is arranged at the butt joint position of the guide vane body and the horn tube in a clamped mode. The upper fluorine material sleeve body and the lower fluorine material sleeve body are in sealed butt joint with the fluorine material jacket; a movable sealing kit is arranged on the portion, located between the shaft sleeve and the impeller, of the main shaft and used for limiting the impeller and sealing the gap between the main shaft and the shaft sleeve and the impeller. By adopting the split fluorine material shell structure of the upper fluorine material sleeve body, the lower fluorine material sleeve body and the fluorine material jacket, the split fluorine material shell structure can adapt to various corrosive media such as strong acid, strong alkali and organic solvents, and the multi-working-condition requirements of industries such as chemical engineering, metallurgy and environmental protection are met; the movable sealing sleeve forms mechanical locking and fixing, the connecting strength is high, and gaps caused by high-speed medium scouring are effectively prevented.

The utility model relates to the field of spinning, in particular to a roller type impurity removing device for cotton yarn processing, in the working process, cotton yarn with impurities enters a cotton storage box through a cotton inlet, a cotton pushing air cylinder works to stretch out a push rod to enable a cotton pushing rod set to move forwards, and the cotton pushing rod set moves forwards; a cotton pushing rod set drives a cotton pushing plate to compress cotton yarn in a cotton storage box forwards to the concave face of the whole section of the cotton storage box, the cotton yarn protrudes out of a long-strip-shaped hole in the concave face, a motor works to drive a cotton hooking soft brush and a cotton conveying wheel in an impurity removing bin to rotate and work, and a soft brush on the cotton hooking soft brush drives fine cotton yarn in the rotating process; cotton yarn and impurities are separated through the carding effect, clean fine cotton yarn passes through the cotton conveying wheel and reaches the position close to the circle center of the cotton conveying wheel from the outer edge of the cotton conveying wheel, at the moment, the cotton suction core located in the center of the cotton conveying wheel sucks the fine clean cotton yarn through negative pressure, and the cotton yarn enters the next processing procedure through the negative pressure cotton suction hose.

The invention relates to the technical field of civil engineering, in particular to an efficient high-frequency induction welding process and tool for a wiring board and a connecting board of a current transformer. The process is based on a double-station welding tool, welding operation is completed through tool pre-debugging, wiring board positioning, brazing filler metal presetting, supporting assembly adjusting, connecting plate clamping, double-station synchronous heating and finished product taking in sequence, and synchronous welding of two sets of wiring boards and connecting plates is achieved through the design that double-station synchronous high-frequency induction heating is combined with preset bent soldering lugs. The tool comprises a high-frequency welding induction heating ring, a high-temperature-resistant mounting base, a double-station gear meshing lifting assembly, a bending welding piece and a double-station adjustable connecting plate supporting assembly. Welding of two sets of products can be completed within 120 s, the average consumed time of a single set is 60 s, and the welding efficiency is improved by about 60% compared with a traditional mode; the tool is matched with the wiring board and the connecting board with the length smaller than or equal to 90 mm, frequent replacement is not needed, the problem of false welding in the welding process is solved, welding meat is full, and consistency is good.

The utility model relates to the technical field of vertical grinding machines, and provides a vertical grinding machine for concrete raw material processing, which comprises a grinding cylinder, supporting legs are fixed to the corners of the bottom end of the grinding cylinder, a quantitative discharging structure is arranged on one side of the top end of the grinding cylinder and comprises a feeding hopper, a feeding cavity, a quantitative cavity, a limiting block, a first rotating shaft, a connecting column and fan blades, and the feeding hopper is arranged on one side of the top end of the grinding cylinder. By arranging the quantitative blanking structure, raw materials are poured into a feeding cavity in a feeding hopper, gradually fall between limiting blocks at the top of a quantitative cavity and then fall between fan blades from the limiting blocks, a power supply is connected, a second motor drives a first rotating shaft and a connecting column to rotate, and the fan blades enable the quantitative raw materials to fall into a grinding inner cavity; and the quantitative blanking function of the device is achieved, and the working efficiency of the vertical grinding machine for concrete raw material processing is improved.