78results about How to "Reduce noise" patented technology

A ground vehicle with flight capability is described including a deployable airfoil configured to deploy from a stowed configuration to a deployed configuration, preferably during ground locomotion of the vehicle. The vehicle also includes a deployment mechanism for automatically deploying the airfoil from the stowed configuration to the deployed configuration. An automated retrieval mechanism may also be included for returning the airfoil to the stowed configuration. Also described are methods of transitioning a vehicle from ground locomotion to flight, including deploying a ram-air airfoil from a stowed configuration to a deployed configuration during ground locomotion of the vehicle.

Electropneumatic control valve for a pneumatic brake system of a vehicle having a relay valve housing in which an axially adjustable control piston is arranged for actuating a valve seat arrangement which switches the compressed-air flow between at least one exterior brake line connection, a supply pressure connection and a bleeder connection. The control piston is axially guided by means of a coaxial guiding arrangement. The guiding arrangement comprises a separate guiding sleeve which is stationarily fastened to the pilot valve housing and which is provided with an upper guiding section which, for the axial guidance, corresponds with a passage bore in the control piston, and which, in addition, has a lower tube section of a smaller outside diameter adjoining the upper guiding section in order to guide the outgoing air flowing through an integrated axial bleeder duct directly to the bleeder connection.

An image sensing apparatus includes a pixel array including a light-shielded area where light-shielded pixels are arranged, and an effective area where non-light-shielded pixels are arranged. Each of the light-shielded pixels includes a first photoelectric conversion unit, a first charge-voltage converter which converts charges generated in the first photoelectric conversion unit into a voltage, and a first amplification transistor functioning as a MOS transistor which receives, at the gate, the voltage converted by the first charge-voltage converter. Each of the non-light-shielded pixels includes a second photoelectric conversion unit, a second charge-voltage converter which converts charges generated in the second photoelectric conversion unit into a voltage, and a second amplification transistor functioning as a MOS transistor which receives, at the gate, the voltage converted by the second charge-voltage converter. The gate capacitance of the first amplification transistor is larger than that of the second amplification transistor.

A blower fan includes a plurality of blades radially extending from a boss provided at a rotary center and spaced apart from each other in the rotational direction, and a ring portion connecting outer peripheral ends of the blades in a ring shape. A radially outer end part at an end on an air-flow upstream side of the ring portion is positioned outward in a radial direction of a rotary shaft in the blower fan, as toward the air-flow upstream side. Thus, the blower can prevent the backflow air from being swirled, thereby reducing noise.

The invention provides a Capsicum annuum L. stem removing machine which is characterized in that the clamping frame of a clamping device is installed on the machine rack of an acceleration feeding device; a first motor frame is fixed to the clamping frame; a transverse material channel is installed on the supporting block of the clamping frame; one end of the transverse material channel is connected with a longitudinal material channel of the feeding device; a second pneumatic motor is installed on the clamping frame; two ends of a driving wheel and two ends of a driven wheel are respectively supported on the first lug and the second lug of the clamping frame; the extending end, which penetrates through the first lug, of the driving wheel is connected with the second pneumatic motor through a second coupler; a synchronous belt is hung on the driving wheel and the driven wheel; a second motor frame of a stem removing device is installed on the support of a stem removing frame; a plurality of cutting knives are arranged on the outer edge of a blade; two ends of a third pneumatic motor are installed on the second motor frame and the support respectively; the blade is installed at the extending end, which penetrates through the support, of a third pneumatic motor; and the stem removing device is installed on the clamping frame of the clamping device. The Capsicum annuum L. stem removing machine disclosed by the invention is high in stem removing efficiency and low in noise and is capable of replacing manual work to reduce labor intensity.

The invention provides a flow control valve, which can be used for flow control in an exhaust gas recirculation pipeline of an internal combustion engine. The flow control valve is provided with a pipe communicating the pipeline, wherein a rotary plate for blocking the pipe is arranged along the vertical direction of the pipe; at least one opening is reserved on the rotary plate; the rotary plate can rotate to the position where the opening and the pipe are superposed; the diameter of the opening is not greater than the outer diameter of the pipe; and a drive mechanism can drive the rotary plate to rotate around the axis of a rotating shaft and the drive mechanism can be a piezoelectric drive mechanism. The flow control valve has the advantages of compact and simple structure, smart size, low energy consumption, low noise and easy and accurate flow adjustment.

The invention relates to a separator with a low noise device. The separator with the low noise device comprises a rack, a drying machine, a first screw conveyer, a cyclone dehumidifier and a hot air furnace, wherein the drying machine, the first screw conveyer, the cyclone dehumidifier and the hot air furnace are arranged on the rack. The drying machine is connected with the rack through rolling wheels, a driving motor is arranged at the lower end of the drying machine, the driving motor is connected with the drying machine through a belt bar, one end of the drying machine is communicated with the cyclone dehumidifier, the lower end of the cyclone dehumidifier is connected with the first screw conveyer, the first screw conveyer is fixed to the rack through supporting rods, the hot air furnace is fixed to the lower end of the left side of the drying machine through screw rods, a second screw conveyer is connected to the upper end of the left side of the drying machine, and the second screw conveyer is connected with a hopper through a feeding pipe. The separator with the low noise device has the advantages that a set of sound insulation plates are mounted on the two sides of the drying machine. The separator with the low noise device is effectively prevented from generating noise during work.

Disclosed is a suction tool for an electric vacuum cleaner provided with: a suction tool main body which comprises an opening (12a) in a lower surface, and comprises a suction chamber (12) thereinside that communicates with the opening (12a); and a connection pipe (18) which is attached to the suction tool main body and communicates with the suction chamber (12). An air intake port (35) for taking in external air is provided in the external surface of the suction tool main body, and an air exhaust port (38) for providing communication between the air intake port (35) and the suction chamber (12) is provided inside the suction tool main body. A sound absorption chamber is provided adjacent to but separately from a communication passage (39) for providing communicating between the air intake port (35) and the air exhaust port (38) of the suction tool main body.

The invention belongs to the technical field of separating devices, in particular to a band-type separating mechanism. The band-type separating mechanism comprises a half block a, a half block b, a bulb rod, an electromagnet, a band set, a separating base, a pressing rod and a turning-connection base. Periphery equipment comprises a separating piece and a piece to be separated. According to the band-type separating mechanism, force needed in load separating is decomposed step by step, and locking can be completed with little action force; when the band-type separating mechanism is used, by means of installation of a slope, the band set, the pressing rod and the like, separation load is decomposed step by step to be at a very small value, locking is completed through the electromagnet, separation can be finished as long as force needed by locking is overcome during separation, noise is low and use is safe during separation.

The invention discloses a finger-like peristaltic bedsore-preventing mattress capable of supporting side turning. The finger-like peristaltic bedsore-preventing mattress is characterized by comprising mattress cloth, a finger-like peristaltic air cushion and side-turning assemblies, wherein the finger-like peristaltic air cushion is fixed to the mattress cloth; and the side-turning assemblies are arranged at the lower side of the mattress cloth. According to the finger-like peristaltic bedsore-preventing mattress provided by the invention, by arranging the side-turning assemblies, by which a patient can turn over, at the bottom of the finger-like peristaltic air cushion, the patient who lies in bed for a long term can turn over, so that bedsores which occur when the body of the patient is locally compressed for a long time are effectively prevented; by adopting side-turning airbags which are identical in size and in accordance with different gas pressures inflated by corresponding inflating devices, side-turning angles of the patient can be conveniently controlled; by filling the mattress with sufficient gas pressure by virtue of side-turning airbags differing in size, the patient can complete side-turning rapidly; and in addition, since the quantity of the adopted inflating devices is less, noise, generated from the inflating devices during working, is reduced.

The invention discloses a plastic gear and a mold opening method thereof, and relates to the technical field of gear design. The plastic gear comprises a gear ring and gear teeth arranged in the circumferential direction of the gear ring, wherein the gear ring is installed on a screw rod; and a drum-shaped part is arranged in the tooth direction of the gear teeth, and the length of the drum-shaped part is 5-10 microns. A metal gear is replaced with the plastic gear, and the problems of corrosion and weight can be solved; the drum-shaped part is arranged on the gear teeth of the plastic gear, and the meshing contact area between the two gear teeth is reduced; and the two gear teeth are meshed properly, and therefore the purposes of reducing noise and improving efficiency are achieved.

The present invention provides an apparatus for measuring signals of touch sensitive screen, which comprises multiple conductive strips including multiple parallel driving strips and multiple parallel sensing strips. Multiple intersecting areas are located at the intersections of these multiple driving and sensing strips. The apparatus comprises a driving circuit and a sensing circuit. The driving circuit sequentially provides a first driving signal and a second driving signal to a first set of the driving strips and a second set of the driving strips, respectively. The sensing circuit sequentially senses a first signal and a second signal of at least one sensing strips corresponding to the first driving signal and the second driving signal, respectively. The time duration of the first driving signal is different from the time duration of the second driving signal.

The invention discloses a low-noise fan for a classroom. The low-noise fan comprises a motor, a fixed base arranged at the lower end of the motor and fan blades connected to the fixed base. The low-noise fan further comprises blocking covers connected to the left side and the right side of the fixed base and noise reduction units fixed to the periphery of the fan blades. In the low-noise fan, the blocking covers arranged on the left side and the right side of the fixed base achieve the flow guide effect on wind power. By means of the arrangement sound wave induction devices, processing chips and sound wave generators, sound waves with the intensity equal to that of noise and the waveform phase opposite to that of the noise can be generated; and according to the wave interference principle, the noise is lowered, and the effect of noise reduction is achieved.

The invention discloses a permanent magnet synchronous traction motor with an air cooling structure and an air cooling method of the permanent magnet synchronous traction motor. The permanent magnet synchronous traction motor comprises an air inlet, internal ducts, cooling ducts and an air outlet. The cooling ducts are arranged at the four corners of a shell. Motor cooling is finished by a composite cooling device which is formed by an external air cooling device and a seal layer internal circulation air cooling device. The external air cooling device adopts the way that the external part is forcedly aired, and the air is led into the internal ducts arranged in a motor interlayer through the air inlet at one end of the motor, and then is led into the cooling ducts, and finally is exhausted from the other end of the motor, so that the heat of the motor is sent out through the cooling air. The internal circulation air cooling device is formed by using a stator air vent, air gaps, a rotor air vent and an impeller arranged on a rotating shaft. The heat of a rotor is transferred to a stator iron core and an end cover through the internal air circulation. The permanent magnet synchronous traction motor is compact in structure and is suitable for a totally enclosed permanent magnet synchronous traction motor with an independent ventilation cooling system for a high speed railway passenger train.

The invention relates to the field of mechanical generating equipment and discloses a generator set with a super-long maintenance period. The generator set with the super-long maintenance period comprises an outer box and a base, wherein an intelligent remote super-long maintenance module, a set control cabinet, a generator set, a machine oil supply pump, a machine oil circulating pump and a machine oil level control box are arranged inside the outer box on the base; the base is also provided with a machine oil box, a used machine oil box, a diesel oil box and a machine oil box inspection door; the intelligent remote super-long maintenance module is provided with a module for reading and storing set working hour information, machine oil level information and maintenance time information; the machine oil level control box is internally provided with a float ball; and a pipeline of the machine oil circulating pump, connected with the machine oil level control box, is also connected with a machine oil filter in series. The invention aims at providing the generator set with the super-long maintenance period; the maintenance period of the generator set is prolonged under the condition that the normal work of the generator set is not influenced; and the maintenance period of the generator set provided by the invention is prolonged by at least 4-5 times than that of the existing generator set.

An electromagnetic valve seat free of water hammer chatter and a water path structure relate to a non-contact type automatic control electromagnetic valve seat in domestic water products. The electromagnetic valve seat is formed by connecting an electromagnetic valve, an electromagnetic valve seat body, a valve seat cylinder, a valve diaphragm and a water inlet supercharge ring. Down closing of the valve diaphragm is stopped or slowed down by means of the pushing effect of water inlet pressure of a water inlet hole, water hammer chatter caused by quick crack closing of the valve diaphragm is effectively reduced or avoided, service life of the valve diaphragm of the electromagnetic valve is prolonged, and vibration noise produced in closing of domestic water products is reduced.

A HVAC system for reducing the level of air rush and blower noise escaping into the interior of the vehicle when the HVAC system is operating in the recirculation mode. The HVAC system includes a recirculation door having an acoustically transparent portion that enables a component of the air rush and blower noise to pass through the recirculation door to the vehicle exterior instead of entering the vehicle cabin or interior through the recirculation air inlet.

The invention relates to a video data filtering and denoising system and method; the video data filtering and denoising system is characterized in that an interframe data processing module, a frame data buffer module and a frame data output control module are connected into a data path; the data of two previous frames and the data of a current frame respectively are multiplied by filtering coefficients for obtaining sums; the obtained sums are averaged to obtain the data of the current filtered frame; the frame data buffer module is formed by a DDR2 (Double Data Rate 2) memory which is provided with three cache regions, wherein each cache region respectively caches the data of a video image of one frame, thereby being capable of adapting to the denoising of a video image of a low-speed moving object; and by carrying out temporal weighted average on the image signal according to a frame period, the edge of the image can be very well reserved with hardly any influence on an image signal, and the noise can greatly lowered, thereby achieving the purpose of improving the signal-to-noise ratio of an image.