186 results about "Vibrating membrane" patented technology

The utility model provides a pump body structure of a piezoelectric fan and the piezoelectric fan. The pump body structure of the piezoelectric fan comprises a piezoelectric vibrator, a pump body and a pump body, a vibrating diaphragm is arranged on one side of the piezoelectric vibrator; the vibrating membrane is provided with a first vent hole communicated with the interior of the piezoelectric vibrator; the piezoelectric vibrator is provided with a vibration node; a cavity; a first opening is formed in one side of the cavity; the side, close to the first vent hole, of the piezoelectric vibrator is located in the cavity, and the wall face of the first opening is connected with a vibration node through a flexible connecting piece so that the piezoelectric vibrator can be suspended in the first opening. A ventilation channel is formed in a space between the piezoelectric vibrator and the cavity; the cavity is provided with a second vent hole; the first ventilation hole, the ventilation channel, the second ventilation hole and the interior of the piezoelectric vibrator are communicated, and the second ventilation hole is formed below the vibrating membrane. According to the embodiment of the invention, vibration noise and airflow noise generated by the cavity due to vibration of the pump body of the piezoelectric fan can be reduced.

According to an embodiment, a sound absorption apparatus includes a front plate, an oscillator, a first frame member, a back plate, and a second frame member. The front plate includes sound holes. The first frame member is connected to the front plate and the oscillator, and forms a first space between the front plate and the oscillator. The second frame member is connected to the back plate and the oscillator, and forms a second space between the back plate and the oscillator. The oscillator includes a diaphragm, a third frame member and a central member which are attached to the diaphragm, and a connecting member coupling the third frame member and the central member. The first frame member includes a space dividing member that divides the first space.

The invention relates to the technical field of sewage treatment, and discloses a membrane bioreactor and system based on piezoelectric vibration. The membrane component in the MBR comprises a composite membrane material and a membrane frame, the composite membrane material comprises a piezoelectric material and an MBR membrane material, the MBR membrane material is used for realizing solid-liquid separation; the piezoelectric material is used for driving the MBR membrane material to vibrate; and the membrane frame is used for fixing the two ends of the membrane filaments in the composite membrane material and providing membrane filament water producing and backwashing water channels and cable channels, so that the whole membrane component with certain mechanical strength is formed. The MBR membrane material is driven to vibrate through piezoelectric vibration, so that membrane pollution is inhibited, and the water production efficiency and the cleaning efficiency of the membrane are improved.

Disclosed herein is an array of ultrasound devices. Each ultrasound device includes a first piezoelectric stack carried by a membrane and forming, together with the membrane, a first piezoelectric micromachined ultrasonic transducer (PMUT), and a plurality of second piezoelectric stacks carried by the membrane and positioned about a periphery thereof, each second piezoelectric stack forming, together with the membrane, a second PMUT. During operation, the first piezoelectric stack is configured to vibrate the membrane in response to application of an alternating voltage to the first piezoelectric stack to thereby generate at least one outgoing ultrasonic pulse toward a target, and during operation, the plurality of second piezoelectric stacks are configured to generate sense voltages in response to bending thereof induced by vibration of the membrane by incoming ultrasonic reflections off the target.

The present invention provides an actuator capable of suppressing a decrease in the vibration displacement of a piezoelectric element, a liquid discharge head, a liquid discharge device, and a method for manufacturing the actuator. [Solution] The actuator 110 is laminated on a flow channel substrate 100, which is a substrate on which a pressurized liquid chamber 4 is formed, and comprises a vibrating membrane 103 that forms part of the wall surface of the pressurized liquid chamber 4, and a piezoelectric element 5 arranged on the side of the vibrating membrane 103 opposite to the side that forms the wall surface of the pressurized liquid 4. The insulating film 8 that electrically insulates at least the second lead wiring, which is a wiring portion drawn out from the second electrode 53, from the piezoelectric membrane 52 and the first electrode 51 has an insulating film opening 8a, and the central part of the second electrode 51 is an area that is not covered by the insulating film 8.

The present disclosure discloses a speaker box including: a housing and a speaker, including: a frame; a vibration system, including: a diaphragm; and a coil; a magnet system, including: a main yoke; a main magnet; and an elastic support member, including: a bottom wall surrounding the main yoke; and a side wall; a metal mesh cover surrounding the elastic support member and fixedly connected to the frame; an inner chamber is enclosed by the frame, the main yoke, the elastic support member and the diaphragm; a back chamber isolated from the inner chamber is enclosed by the main yoke, the elastic support member, the metal mesh cover and the housing; a plurality of air vents provided on the metal mesh cover is configured to connect the back chamber with the inner chamber. The speaker box in the present disclosure has higher reliability and higher sound quality.

1. The name of the design product: integrated cabinet. 2. The use of the design product: used in the technical field of water treatment equipment, specifically used in the outer cover cabinet of the driving device in the vibrating membrane bioreactor system, integrating display, electrical control, ventilation, protection and other functions. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design.

A microspeaker includes a frame defining a space; and an actuator positioned within the space, the actuator including a diaphragm configured to vibrate in a first direction during operation. A center axis of the diaphragm extends in the first direction. A plate assembly mechanically couples to the frame and defines a path for venting fluid from the space. The plate assembly includes: a first plate extending in a plane and defining first apertures that are offset from the center axis in the plane; and a second plate defining a second aperture intersected by the center axis. The second plate includes: an inner recessed region abutting the second aperture; and an outer non-recessed region. The first plate is mechanically coupled to the second plate, the first plate and the inner region of the second plate defining a channel that fluidly couples the first apertures to the second aperture.

Aspects of the present disclosure are directed to a speaker system that uses a single driver that results in both force and moment canceling. The speaker system can be mounted within a structure, such as a head mounted display. The speaker system includes a first moving mass, including a sound-producing diaphragm, connected by a primary suspension to a floating basket. The floating basket is both coupled to a second moving mass that controls a voice coil, inducing voice coil movement to produce sound via the diaphragm. A secondary suspension can couple the suspended basket and a fixed frame. The secondary suspension can reduce shaking and contamination generated by the magnet core / motor assembly from seeping into the fixed frame and subsequently to other connected components.

Embodiments herein provide for cooling assemblies provided within a handheld device. In one embodiment, a handheld device comprises a casing, a device package, and a cooling assembly. The casing has an air inlet opening and an air outlet opening disposed therethough. The casing volume is split into a device volume and a cooling volume, the cooling volume separated from the device volume by a dividing surface, and the cooling volume includes the air inlet opening and the air outlet opening. The device package is disposed within the device volume, and the cooling assembly is attached to the casing wall and disposed within the cooling volume. The cooling assembly comprises a vibrational membrane arranged to create a cooling airflow within the cooling volume by drawing air through the air inlet opening.

The present invention specifically relates to a method for preparing a piezoelectric MEMS smart speaker, including: using a theoretical formula for film vibration frequency to preliminarily calculate the film vibration frequency according to a target frequency range; using finite element analysis software to perform simulation and predict the resonance frequency of each vibration membrane to determine the material of each layer; selecting a piezoelectric material; selecting a substrate material; sputtering a first electrode material on the substrate, and etching to form a required electrode pattern; depositing a piezoelectric layer material to ensure uniform thickness; sputtering a second electrode material on the piezoelectric layer, and etching to form a required electrode pattern; testing the actual performance frequency of the speaker; adjusting the thickness or shape of the piezoelectric layer according to the test results; and also including using a dynamic algorithm to adjust the thickness or shape of the piezoelectric layer; re-depositing the piezoelectric layer and adjusting it; until the resonance frequencies of all vibration membranes are within the target range.

A 3D ultrasonic sensor probe, comprising a housing, a vibrating diaphragm, a piezoelectric element, and a plurality of ultrasonic receiving elements. The bottom of the housing is connected to the vibrating diaphragm. The housing is provided with a first through hole and a plurality of second through holes having the same number as that of the ultrasonic receiving elements, the first through hole and the plurality of second through holes all extending in the height direction of the housing. The piezoelectric element is arranged in the first through hole and is fixed to the vibrating diaphragm. The plurality of ultrasonic receiving elements are respectively arranged in the plurality of second through holes on a one-to-one basis and are fixed to the vibrating diaphragm or side walls of the second through holes. The present invention has a simple structure, is easy to manufacture, and has a great ability to identify obstacles.

The utility model discloses a modal shape demonstration device based on thin wall board vibration is constituted by the excited vibration thin wall board, support connecting piece, loudspeaker, cross support, fine sand recovery device and base, and the base is hollow cube structure, is provided with cross support at the top of base, is provided with loudspeaker support above cross support, and the upper surface of loudspeaker support is fixed loudspeaker, the bottom of support connecting piece is fixed on the diaphragm of loudspeaker, and the top is fixed with magnet A, and the excited vibration thin wall board is placed on magnet A, and magnet B is arranged on the upper surface of excited vibration thin wall board, and magnet A and magnet B are attracted to each other and realize the fixation to excited vibration thin wall board, and fine sand recovery device is composed of funnel structure and drawer, and the bottom of funnel structure is set up above cross support, and loudspeaker support, loudspeaker, support connecting piece, excited vibration thin wall board are surrounded, and the lower part of base is provided with drawer, and the back of base is equipped with power amplifier module.

The present invention provides a speaker including a frame, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil, and a supporting member. The diaphragm includes a first suspension, a second suspension, and a dome. The dome includes a main portion, a first extension portion bending and extending from an inner periphery of the main portion in a direction close to the supporting member, and a second extension portion bending and extending from the first extension portion in the direction close to the first suspension. An outer periphery of the main portion and the second extension portion are fixed to the supporting member, and the outer periphery of the first suspension is fixed to the second extension portion. The speaker of the present invention has a better reliability and a higher stability of acoustic performance.

The present disclosure provides a stator blade, a noise reduction method of an open rotor engine, and an open rotor engine. The stator blade is arranged at the axial rear side of the rotor blade of the open rotor engine. The surface of the stator blade is provided with a vibrating membrane. The vibrating membrane is arranged on the surface of the region where the airflow generated by the rotation of the rotor blade interacts with the stator blade, and the vibrating membrane can vibrate along the normal direction. The amplitude of the vibrating membrane is arranged to attenuate the airflow generated by the rotation of the rotor blade.

The utility model discloses a sound fish luring device capable of being used in deep water. The device comprises a floating body, a hydrophone and a low-frequency transmitting transducer, wherein the hydrophone and the low-frequency transmitting transducer are connected with the floating body through cables; a power supply, a memory and the like are arranged in the floating body. The hydrophone collects fish ingestion sound and stores the fish ingestion sound in the memory, and the fish ingestion sound is transmitted out by the low-frequency transmitting transducer to lure fish after being processed by the signal output module and the power amplifier. The low-frequency transmitting transducer is provided with a shell, a telescopic air bag and a vibrating membrane; the air bag and the vibration cabin balance internal pressure and external pressure through an air guide pipe, a copper coil is wound outside a vibration membrane extension cavity and matched with a permanent magnet to generate a magnetic field to enable the vibration membrane to produce sound, and the frequency band of 10 Hz to 3 kHz can be covered. The device has a recording mode and a playing mode, is connected and controlled through mobile phone APP Bluetooth, can accurately trap different fishes, improves the fishery yield, has automatic pressure compensation to adapt to deep water, realizes small size and low cost through a single array element, has the sounding frequency far better than that of a traditional underwater horn, and has remarkable advantages.

Provided is a mounting component held so as to be capable of attachment and detachment by a mounting machine. The mounting component includes a membrane support, a vibrating membrane connected to the membrane support and displaceable in a membrane thickness direction, and a contact member that is located on the membrane support and is subjected to an upward attractive force by the mounting machine without generating stress leading to shape deformation or breakage of the vibrating membrane during the attachment and detachment.

A liquid discharge head includes a common liquid chamber having multiple liquid chambers communicating with each other through the common liquid chamber, a vibration film having multiple nozzles, multiple vibration generators, and a flexible member. The common liquid chamber stores a liquid. The multiple nozzles respectively communicate with the multiple liquid chambers. The multiple vibration generators individually vibrate the vibration film around the multiple nozzles, respectively. The flexible member is opposed to the multiple nozzles in the common liquid chamber. The flexible member is deformable by the liquid in the common liquid chamber vibrated by the vibration film.

The invention relates to the technical field of sewage treatment devices, in particular to a high-pressure overclocking vibrating membrane equipment system which comprises a base and further comprises a sealing tank, the sealing tank is connected with a mounting plate, and a plurality of elastic seats are fixedly connected between the mounting plate and the base; the centrifugal system comprises a pressurizing device and an air injection device which are communicated to the side face of the sealing tank in the tangential direction of the sealing tank, the pressurizing device is located above the air injection device, and the water outlet direction of the pressurizing device is consistent with the air injection direction of the air injection device. By arranging the centrifugal system, the pressurizing device and the air injection device, sewage flow and air flow are injected in the same tangential direction of the sealing tank to form stable rotational flow, centrifugal force is generated when the sewage flow forms the rotational flow, high-density pollutants are thrown to the tank wall, a low-pollution area is formed in the center of the tank, the filtering load on the surface of a membrane is reduced, and the filtering efficiency is improved. The injection of gas in the same direction enhances the stability of rotational flow, a gas-liquid boundary layer is formed, the surface of the membrane is continuously cleaned through the air knife effect, and pollutant attachment is reduced.

A high-acoustic-resistance piston motion loudspeaker disclosed in the present disclosure belongs to the field of sound-electricity conversion. The loudspeaker includes a substrate, a driving assembly, a vibrating diaphragm, a connecting assembly and a vibration cavity. The connecting assembly is not coplanar with the vibrating diaphragm, which is of a concealed connecting structure. The driving assembly is configured to drive the vibrating diaphragm to generate a piston motion. The vibrating diaphragm is located in the vibration cavity, and a displacement range of the vibrating diaphragm in a perpendicular direction is within a height range of the vibration cavity formed by a supporting structure extending in a thickness direction of a base, so as to achieve purposes of reducing air leakage and improving a sound pressure level in a working process of the loudspeaker.

The present application relates to the technical field of piezoelectric thin film material, and particularly relates to a piezoelectric thin film nozzle suitable for a micro-electro-mechanical system and a preparation method thereof. The nozzle comprises a silicon substrate, a composite vibrating membrane layer, a lower electrode, a gradient lanthanum-doped lead zirconate titanate piezoelectric thin film and a ring-shaped upper electrode. The piezoelectric thin film is sequentially provided with a lanthanum-rich bottom layer, a lanthanum-transition middle layer and a lanthanum-depleted surface layer along the thickness direction. Through gradient doping, layered atmosphere heat treatment and full-film three-stage gradient crystallization annealing, residual stress is effectively released, warping deformation and micro-crack propagation are inhibited, and the piezoelectric coefficient is improved. The design of the ring-shaped upper electrode and the center reserved spray hole can stably convert the low stress advantage of the material level into the improvement of the liquid droplet spraying direction precision, volume consistency and long-term stability, thereby solving the problem that the piezoelectric thin film is prone to warping and cracking, and the spraying precision and reliability are difficult to be considered in the prior art.

The invention provides a flocculation and vibration membrane filtration integrated polluted water treatment device and method.The device comprises an integrated reaction tank, a water inlet unit, a flocculant adding unit, a stirring unit, a vibration membrane unit and a water outlet unit, and the integrated reaction tank is divided into a flow guide area and a filtering area through a flow guide plate in the water flow direction; a water flow channel is arranged between the guide plate and the bottom of the integrated reaction tank; the water inlet unit is communicated with the flow guide area; the flocculating agent adding unit is communicated with the flow guide area; the stirring unit is arranged in the flow guide area; the vibrating membrane unit is arranged in the filtering area; the water outlet unit is communicated with the water outlet of the vibrating membrane unit, so that the stability and the efficiency of the whole water treatment system are improved.

A speaker includes a vibration system and a magnetic circuit system driving the vibration system to vibrate and sound. The vibration system includes a voice membrane and a voice coil driving the voice membrane to vibrate. The voice membrane includes a diaphragm and a dome fixed with the diaphragm, the dome includes a main body and a positioning portion bending and extending from an edge of the main body, the positioning portion is used for ensure concentricity of the diaphragm when the diaphragm is integrally formed with the dome. Compared with the related art, the speaker disclosed by the present disclosure could improve the reliability.

This micro speaker comprises: a cylindrical first frame which is incorporated into a housing of an earphone and has a first empty chamber; a diaphragm which is provided in one opening of the first frame and has an edge on a peripheral edge of a dome; a cylindrical voice coil which is coaxially fixed to the diaphragm; an annular magnet which is arranged in the first frame and has, as the center thereof, a dome lower ventilation path coaxial with the voice coil; a rear cover which covers at least a part of the other opening of the first frame; and a second frame which is attached to the rear cover and has a second empty chamber communicating with the first empty chamber. In the first frame, the other opening, which is not covered by the rear cover, is blocked by a substrate that partitions the first empty chamber.

An audio transducer assembly and an apparatus incorporating the same are disclosed. The assembly includes an audio transducer, comprising a diaphragm and a transducing mechanism, which is substantially encapsulated by a metallic enclosure. The enclosure is an integrally formed unit that provides structural reinforcement to a host apparatus, such as a slender housing of a wearable device. To ensure a durable interface, the enclosure may feature a profiled edge region that facilitates a stress-reducing junction with the housing. In some embodiments, the transducer is an armature-type transducer where the diaphragm is rigidly coupled to a pivoting armature. Apertures in the enclosure provide an acoustic pathway from the diaphragm to an exterior of the housing, allowing the assembly to function as a loudspeaker or a microphone.

The invention relates to a listening device (1) configured to generate and transmit sound frequencies to a user by bone conduction, and comprising a main body (2) defining an internal volume (6), at least one electroacoustic transducer (7) configured to generate vibrations of varying frequencies and intensities, a control unit (CU) configured to control the operation of the listening device, a vibrating diaphragm (8), and a receiving element (9) configured to be in contact with the user. The receiving element (9) comprises a plurality of support members (10) including an upper end portion (11) configured to be in contact with the user, and a lower end portion (12) extending substantially opposite the vibrating diaphragm (8).Each support member (10) is movable between a rest position and an operating position in which the lower end portion (12) of the support member (10) is in contact with the vibrating membrane (8). Figure 1.

The piezoelectric driving silicon-based micro-electro-mechanical resonator with the high quality factor comprises a substrate silicon layer with a cavity and a vibrating membrane layer which is arranged on the substrate silicon layer and covers the cavity, and the vibrating membrane layer sequentially comprises a bottom electrode layer, a piezoelectric layer and a top electrode layer from bottom to top. The bottom electrode layer sequentially comprises a device silicon layer, a dielectric layer and a first metal layer from bottom to top, the dielectric layer covers part of the device silicon layer, the first metal layer at least covers part of the dielectric layer, and the first metal layer at least partially extends to the outer side of the dielectric layer and covers at least part of the device silicon layer; according to the piezoelectric driving silicon-based micro-electro-mechanical resonator, the dielectric layer is covered by the first metal layer, and the dielectric layer is wrapped or half wrapped by the first metal layer, so that the piezoelectric driving silicon-based micro-electro-mechanical resonator obtains a high quality factor Q value and low electrical loss, namely low series resonance impedance, in a full-temperature range.

Provides are an ultrasonic transducer, a fabrication method thereof and an electronic device. The ultrasonic transducer includes: an array substrate having a groove, a bottom electrode and an insulation layer, wherein an orthographic projection of the groove on the array substrate is within an orthographic projection of the bottom electrode on the array substrate, and the insulation layer covers the bottom electrode; and an opposite substrate, the opposite substrate and the array substrate are oppositely arranged and are attached to each other, the opposite substrate and the array substrate form a cavity in the groove, the opposite substrate has a top electrode and a vibrating diaphragm layer which are arranged in stack, and an orthographic projection of the top electrode on the array substrate is within the orthographic projection of the bottom electrode on the array substrate.

The invention provides a capacitive MEMS acoustic emission sensor chip structure and a preparation process thereof, the capacitive MEMS acoustic emission sensor chip structure is composed of a bottom electrode, a dielectric layer, a sacrificial layer, a top film layer and an anchor point, and through a phase reversal design, the anti-noise capability is greatly enhanced while high sensitivity and a flat passband are maintained. The method comprises the following steps of: cleaning a substrate, forming a bottom electrode, depositing a dielectric layer, depositing a sacrificial layer and an anchor region, forming a top film layer and releasing the sacrificial layer, and combining a multi-layer photoresist process and XeF2 dry etching to realize the stripping of a thick metal film and the release of the sacrificial layer. According to the invention, integration and flat passband of the controllable cavity structure and the high-performance vibrating diaphragm are realized, so that the device has great application prospects in the aspects of structural health monitoring and nondestructive testing of industrial equipment.

The invention discloses a compound control full-frequency-domain moving iron driving unit which comprises a shell, a sound outlet nozzle, a vibration system, a magnetic circuit system and an electric connection assembly. The vibrating system is composed of a vibrating diaphragm support, a low and medium frequency vibrating diaphragm, a high frequency vibrating diaphragm, a first driving rod and a second driving rod, and the two groups of vibrating diaphragms are installed on the vibrating diaphragm support side by side and respond to signals of different frequency bands respectively. The magnetic circuit system comprises a balanced armature, a coil, a magnet and a magnet yoke, and the coil generates an alternating magnetic field after being electrified and interacts with a constant magnetic field of the magnet, so that the balanced armature swings around a balance point. And the mechanical displacement of the armature is simultaneously transmitted to the low and medium frequency vibrating diaphragm and the high frequency vibrating diaphragm through the two driving rods, so that collaborative sound production of different frequency bands is realized. The structure realizes full-frequency-domain output of 20 Hz-20 KHz in a single moving iron unit, and has the advantages of compact structure, high energy utilization rate and balanced tone quality.