28 results about "Elastic membrane" patented technology

The invention relates to the field of building materials, in particular to a novel light sound insulation composite wallboard and a preparation method thereof.The composite wallboard comprises a first layer and a second layer which are compounded in sequence; the first layer is a gradient closed-cell foam layer, and the density of the first layer is distributed in a gradient increasing mode from the first surface away from the second layer to the second surface compounded with the second layer. The second layer is an integrated micro-perforated-adjustable neck depth honeycomb layer and comprises a micro-perforated panel, an adjustable neck depth element and a honeycomb core which are arranged in sequence; the micro-perforated panel is connected with the first layer, the neck depth adjustable element is an elastic film, and the elastic film, the micro-perforated panel and the honeycomb core jointly define a plurality of Helmholtz resonant cavities. According to the light sound insulation composite wallboard, efficient introduction of sound waves is achieved through impedance gradual change design, the adjustable resonance dissipation unit conducts targeted absorption on low-frequency noise, full-frequency-band and high-performance air sound isolation from low frequency to high frequency is achieved, and dual optimization of acoustic performance and space efficiency is achieved.

To provide a thin and light-weight soundproof structure that can provide sufficient sound insulating properties, and can be easily and stably mounted on a panel of an automobile having a curved surface or irregularities.SOLUTION: A soundproof structure 8 is arranged in one or both of at least part of a position at which a space in which a rear wheel tire is accommodated and a cabin are partitioned from each other and at least part of a position at which a space in which a front wheel tire is accommodated and the cabin are partitioned from each other, in an automobile, and includes a soundproof structure part 8a. The soundproof structure part 8a has a film part 2 having elasticity, support wall parts 3 erected on the film part 2 and having elasticity, and weight parts 4 erected on the film part 2. The film part 2 is divided into a plurality of sections by the support wall parts 3, and one weight part 4 is arranged in one section. The height of the support wall part 3 is larger than the height of the weight part 4. Each of the weight parts 4 forms a spring-mass resonator having a spring part 4a having elasticity and a mass part 4b having a larger mass than the spring part 4a.SELECTED DRAWING: Figure 3

This invention provides a thin and lightweight sound-insulating structure that offers sufficient sound insulation, can be easily and stably mounted on curved surfaces, and has good sound insulation in the low-frequency range. [Solution] The sound-insulating structure 1 has an elastic membrane portion 2 and a weight portion 4 erected on the membrane portion 2. Each of the weight portions 4 constitutes a spring-mass resonator having an elastic spring portion 4a and a mass portion 4b with a mass greater than that of the spring portion 4a. The durometer A hardness of the membrane portion 2 is 30 or less.

The utility model provides electronic equipment, and relates to the technical field of electronics. The electronic device comprises: a housing having a pressure relief hole; the sound production module is arranged in the shell; the sound production module is provided with a damping hole; the pressure relief assembly is arranged in the shell, the pressure relief assembly comprises a pressure relief pipe and a waterproof breathable film, one end of the pressure relief pipe is communicated with the pressure relief hole, the other end of the pressure relief pipe is communicated with the damping hole, and the waterproof breathable film blocks one end of the pressure relief pipe; the elastic film is arranged in the shell, a closed cavity is defined by the elastic film and the shell, and the closed cavity is filled with gas. The sound quality of the electronic equipment can be improved.

The utility model relates to diaphragm technical field, concretely is a kind of novel elastic composite flat diaphragm, the flat diaphragm includes support and diaphragm component, hollow hole is opened in the support, the diaphragm component is fixed on support, and hollow hole is completely shielded, the diaphragm component includes elastic membrane layer and the metal layer being arranged on the upper and lower ends of elastic membrane layer, electrically conductive coil is arranged at hollow hole on the metal layer, the both ends of electrically conductive coil are all provided with conducting point, and the conducting point and electrically conductive coil are electrically connected, and the protective layer is provided on the end face of electrically conductive coil away from metal layer. The utility model has simple structure, reasonable in design, diaphragm sound production effect is good, service life is long, and electrically conductive coil resistance adjustable, satisfy the use demand of different products, it is worth promoting and using.

The application provides a soundproof cover, a control method and a compressor. The soundproof cover comprises a cover body and a unit cell for noise reduction. The inner wall of the cover body is arranged with a plurality of unit cells. The cover body has a containing cavity for placing a noise source. The unit cell comprises a mounting frame and an elastic membrane. The mounting frame has a cavity. The side wall of the elastic membrane is connected with the inner wall of the mounting frame. A first cavity chamber faces the containing cavity. A second cavity chamber forms a soundproof chamber with the inner wall of the cover body. A mass is arranged on the side of the elastic membrane facing the containing cavity. The pre-tightening force of the elastic membrane is adjustably arranged. Since the inner wall of the cover body is arranged with a plurality of unit cells and the pre-tightening force of the elastic membrane can be adjusted, the soundproof cover can effectively reduce noise with different peak frequencies, thereby meeting the requirement of effectively reducing noise of the noise source under different operating frequencies.

Cooling device for cooling a position-sensitive component (17-19, M1-M6, 35, 36) of a semiconductor lithography system, in particular a projection exposure system. The cooling device comprises a component (40, 50) connected to a cooling line (29) and through which a cooling fluid flows, with an elastic membrane (41, 51) which is in contact with the cooling fluid (44) on an inner surface (42, 52). The cooling device further comprises a mechanical actuator (26, 26') which is configured to exert an adjustable force on the elastic membrane (41, 51) in order to influence the vibration behavior of the elastic membrane (41, 51). The invention further relates to a cooling system and a projection exposure system, each of which has such a cooling device.The actuator allows the vibration behavior of the elastic membrane to be adapted to characteristic frequencies of sound waves within the cooling system, thereby improving sound damping.

The application provides a bone voiceprint sensor, which comprises a first circuit board, a cavity formed in the lower surface of the first circuit board, a sound hole and an exhaust passage formed in the upper surface of the first circuit board, a vibration system arranged in the cavity, a support part, an elastic membrane arranged on the support part, and a mass arranged on the elastic membrane, wherein the elastic membrane divides the cavity into a first lower chamber and a second upper chamber, a second circuit board arranged below the first circuit board and sealing the cavity, a MEMS microphone assembly arranged on the upper surface of the first circuit board and communicating with the cavity through the sound hole, and a shell connected with the first circuit board and enclosing a containing cavity containing the MEMS microphone assembly, wherein the containing cavity communicates with the first chamber through the exhaust passage. The bone voiceprint sensor can improve the compact structure, improve the packaging integration, improve the sensitivity of the microphone, simplify the process, improve the reliability, and reduce the cost.

------09 / 04 / 2564------(OCR) This invention relates to a diffuser with a tubular substrate fitted with air inlets and outlets, and a flexible membrane covering the outer surface of the tubular substrate. The flexible membrane has several slits that pass through from its inner to outer surface, and projections extending toward the tubular substrate and outward along its axial direction are arranged on the inner surface of the flexible membrane. ------------ This invention relates to a diffuser with a tubular substrate fitted with an air inlet. And the air passages and a flexible membrane that covers the outer surface of the tubular substrate where the membrane... The elastic membrane has a number of slits that allow passage from the inner surface to the outer surface of the elastic membrane. And the projections that extend towards the tubular substrate and outward in the axial direction of the tubular substrate are positioned at: The inner surface of the elastic membrane.

This invention provides a thin and lightweight sound-insulating structure that offers sufficient sound insulation, can be easily and stably mounted on curved surfaces, and has good sound insulation in the low-frequency range. [Solution] The sound-insulating structure 1 has an elastic membrane portion 2, an elastic support wall portion 3 erected on the membrane portion 2, and a weight portion 4 erected on the membrane portion 2. The membrane portion 2 is divided into a plurality of sections 5 by the support wall portion 3, and the weight portion 4 is located inside all or some of the plurality of sections 5, and in the sections 5 in which the weight portion 4 is located, one weight portion 4 is arranged in each section 5. The height H1 of the support wall portion 3 in the direction perpendicular to the membrane portion 2 is greater than the height H2 of the weight portion 4 in the direction perpendicular to the membrane portion 2. Each of the weight portions 4 constitutes a spring-mass resonator having an elastic spring portion 4a and a mass portion 4b with a mass greater than the spring portion 4a. The area occupied by each section 5 in the membrane portion 2 is 1000 mm². 2 ~2500mm 2 That is the case.

The application provides a bone voiceprint sensor, which comprises a first circuit board, a first cavity, and an exhaust passage connected with the first cavity; a second circuit board, a second cavity, an acoustic hole connected with the second cavity, and an exhaust hole corresponding to the position of the exhaust passage; a vibration system arranged in a vibration space formed by the first cavity and the second cavity, comprising an elastic membrane arranged on a first surface and covering the first cavity, and a mass block arranged on the elastic membrane; a MEMS microphone assembly arranged on the second circuit board and connected with the cavity through the acoustic hole; and a shell connected with the second circuit board and enclosing a containing cavity containing the MEMS microphone assembly, wherein the containing cavity is connected with the first cavity through the exhaust hole and the exhaust passage. The bone voiceprint sensor can improve the compact structure, improve the packaging integration, improve the sensitivity of the microphone, simplify the process, improve the reliability, and reduce the cost.

The present invention provides a thin and lightweight sound-insulating structure that offers sufficient sound insulation, can be stably mounted, and has good sound insulation over a wide frequency range. [Solution] The soundproofing structure 11 comprises a sound-insulating structure 1 and a plate-shaped member 8 on which the sound-insulating structure 1 is placed. The sound-insulating structure 1 comprises an elastic membrane portion 2 and a weight portion 4 erected on the membrane portion 2. Each of the weight portions 4 constitutes a spring-mass resonator having an elastic spring portion 4a and a mass portion 4b with a greater mass than the spring portion 4a. The plate-shaped member 8 is made of aluminum, an aluminum alloy, or resin.

To provide a damper member capable of suppressing connection failure of an elastic film, and to provide a liquid discharge head, a liquid discharge device and a recording device including the damper member.SOLUTION: A damper member 6 is a member to be arranged on a second channel member 5 in a liquid discharge head 2. In the damper member 6, a first damper plate 61 and an elastic film 63 are connected by a first connection sheet 62. The first connection sheet 62 comprises: a partition wall connection part 625 for connecting a partition wall part 615 of the first damper plate 61 and the elastic film 63; a first peripheral wall connection part 626 for connecting a first peripheral wall part 616 of the first damper plate 61 and the elastic film 63; a second peripheral wall connection part 627 for connecting a second peripheral wall part 617 of the first damper plate 61 and the elastic film 63; and a connection part 628 for connecting the first peripheral wall connection part 626, the partition wall connection part 625 and the second peripheral wall connection part 627.SELECTED DRAWING: Figure 8

The present invention relates to an initialization device for an elastic membrane, a polishing apparatus, an initialization method for an elastic membrane, and a life determination method for an elastic membrane. The initialization device (50) for the elastic membrane (10) includes a pressurizing device (55), an expansion amount detection device (58), and a control device (40) configured to compare an expansion amount detected by the expansion amount detection device (58) with a predetermined target expansion amount, and when the expansion amount reaches the target expansion amount, determine a completion of an initialization of the elastic membrane (10).

The invention relates to an elastic film (1) having at least one core layer (3) based on styrene block copolymers, the at least one core layer (3) being arranged between at least two cover layers (2). The cover layers (2) have elastic properties without activation, the film (1) having a force of less than 3.75 N when stretched by 160% in a first loading cycle. For this purpose, a film strip for the loading cycle has a width of 25 mm in the MD direction and the film strip is fastened, at a CD distance of 25 mm, between grippers of a testing device and the film strip is stretched in CD at a speed of 254 mm / min.

The present invention is directed to a recirculation system for use in microfluidic centrifugal disc platforms for reusing and mixing an entire sample. The present invention features a system comprising a reservoir, an input channel, a detection array, a pressure chamber, and a recirculation channel connecting the pressure chamber to the reservoir. The recirculation channel may have a resistance lower than the channel upstream resistance. When the CD platform spins at a high RPM, the liquid may be directed from the reservoir into the pressure chamber. When the RPM of the CD platform decreases rapidly, the liquid may be directed from the pressure chamber through the channel and through the recirculation channel to the reservoir, such that the liquid travels through the recirculation channel faster than the liquid travels through the channel.

To provide a thin and light-weight soundproof structure that can provide sufficient sound insulating properties, and can be easily and stably mounted on at least part of a member that partially separates a cabin of an automobile, which may have a curved surface or irregularities, from the outside of the automobile.SOLUTION: A soundproof structure 1 is arranged at at least part of a member that partially separates a cabin of an automobile from the outside of the automobile, and has a film part 2 having elasticity, support wall parts 3 erected on the film part 2 and having elasticity, and weight parts 4 erected on the film part 2. The film part 2 is divided into a plurality of sections by the support wall parts 3, and the weight parts 4 are located inside all the sections or some of the sections. One weight part 4 is arranged in one section. The height of the support wall part 3 extending in a direction orthogonal to the film part 2 is larger than the height of the weight part 4 extending in the direction orthogonal to the film part 2. Each of the weight parts 4 forms a spring-mass resonator having a spring part 4a having elasticity and a mass part 4b having a larger mass than the spring part 4a.SELECTED DRAWING: Figure 7

The application provides a metamaterial muffler, comprising: a main body section, the main body section comprising a low-frequency muffling module and a medium-frequency muffling module connected, a plurality of low-frequency muffling channels provided in the low-frequency muffling module and a plurality of medium-frequency muffling channels provided in the medium-frequency muffling module are in one-to-one correspondence and in communication; a transition section, at least one end of the main body section is connected with the transition section, the transition section comprises a plurality of air guide modules, the plurality of air guide modules are spliced with each other and are arranged in one-to-one correspondence with the plurality of low-frequency muffling channels; each air guide module comprises: an outer frame, which is hollow; an inner frame, which is arranged in the outer frame, the inner frame is hollow to form an air guide channel, a first end of the inner frame is fixedly connected with a first end of the outer frame in a circumferential direction, a second end of the inner frame is flush with a second end of the outer frame, an inner diameter of the inner frame gradually decreases in a direction towards the second end of the inner frame, an elastic membrane is fixed to an inner wall of the inner frame, and the second end of the inner frame is arranged towards the main body section; a baffle, which blocks a space between the inner frame and the outer frame at the second end of the inner frame, and the inner frame, the outer frame and the baffle enclose a cavity.

The invention discloses a silencing and filtering box body structure of a fan and a working method of the silencing and filtering box body structure, and relates to the technical field of fan equipment, and the box body structure comprises an air inlet cabin body, a working cabin body and an air outlet cabin body which are arranged from top to bottom. A labyrinth type air inlet channel and a filtering unit are sequentially arranged in the air inlet cabin body in the air flow direction. An elastic membrane of the device divides a driving cavity into two chambers which are respectively communicated with a pressure pulsation source and a first filtering cavity, and the elastic membrane can directly act on an elastic core material of a first-stage filtering module through a top opening. When the system runs, the diaphragm can be driven to move periodically by utilizing pressure pulsation of the system or external pressure pulsation, so that the filter element is automatically cleaned. The noise reduction, filtering and self-cleaning functions are highly integrated, the structure is compact, noise can be effectively reduced, vibration can be effectively isolated, the maintenance frequency is remarkably reduced through self-adaptive cleaning, and the fan operation energy efficiency and reliability are improved.

The utility model discloses a self-adaptive adsorption industrial stethoscope based on a double-microphone structure, and relates to the technical field of mechanical vibration and acoustic detection, the self-adaptive adsorption industrial stethoscope comprises a stethoscope head and an electronic acquisition module; the auscultation head comprises an auscultation head shell, a hyperbolic flexible suction cup, an elastic membrane, a mechanical linkage assembly and an acoustic conversion assembly. The hyperbolic flexible suction cup is fixed to the front end of the stethoscope head shell, and the elastic membrane is sealed in an inner cavity to define a closed coupling cavity. And the operation piece of the mechanical linkage assembly rotates to drive the traction piece to displace, so that the elastic membrane deforms to generate negative pressure. The acoustic conversion assembly comprises a main microphone located in the closed coupling cavity and an auxiliary microphone located on the outer wall of the auscultation head shell. The hyperbolic flexible suction cup is matched with a mechanical negative pressure structure, so that single-hand fixation and self-adaptive adsorption on surfaces with various curvatures are realized, a stable acoustic measurement channel is established, and handheld jitter noise is avoided; through the physically isolated internal and external dual-microphone layout, the environmental noise is separated from the hardware source, and the measurement signal-to-noise ratio is improved.

To provide a thin and light-weight soundproof structure that can provide sufficient sound insulating properties, and can be easily and stably mounted on a panel of an automobile having a curved surface or irregularities or an automobile member mounted on the panel.SOLUTION: A soundproof structure 1a is arranged at part of a position at which a space 12 in which a front wheel tire 11 of an automobile is accommodated and a cabin 13 are partitioned from each other, and has a film part 2 having elasticity, support wall parts 3 erected on the film part 2 and having elasticity, and weight parts 4 erected on the film part 2. The film part 2 is divided into a plurality of sections by the support wall parts 3, and the weight parts 4 are located inside all the sections or some of the sections. One weight part 4 is arranged in one section. The height of the support wall part 3 extending in a direction orthogonal to the film part 2 is larger than the height of the weight part 4 extending in the direction orthogonal to the film part 2. Each of the weight parts 4 forms a spring-mass resonator having a spring part 4a having elasticity and a mass part 4b having a larger mass than the spring part 4a.SELECTED DRAWING: Figure 2

The utility model discloses an assembly type building wall body with a sound absorption structure, which comprises a wall body, a sound insulation plate is fixedly arranged in the wall body, a plurality of uniformly distributed mounting hole grooves are formed in the sound insulation plate, and sound attenuation cones are fixedly arranged in the mounting hole grooves. The noise reduction cone comprises a mounting ring fixedly mounted in the sound insulation plate, an inner noise reduction ring located in the mounting hole groove is fixedly mounted on one side of the mounting ring, an elastic film is fixedly mounted in the middle of the mounting ring, an outer noise reduction ring is integrally connected to the outer circumferential face of the inner noise reduction ring, and a turbulent flow groove is formed in the inner circumferential face of the inner noise reduction ring. Noise vibration is continuously reflected and absorbed through the turbulent flow grooves and the turn-back slopes and then absorbed through the silencing grooves, so that the noise is further reduced, meanwhile, the arranged elastic films and the cavities formed by the elastic films and the bottoms of the mounting groove holes can also buffer and absorb the noise, and the effect of reducing the noise can be achieved.

The utility model discloses a water vapor transmission rate testing device of an ultra-high barrier film, which relates to the technical field of ultra-high barrier film testing and comprises a working plate, an oxygen transmission rate detection structure and a resistance detection structure are mounted on the working plate, and the oxygen transmission rate detection structure comprises an oxygen box. A sliding pipe is fixedly connected to the upper side of the oxygen box in a penetrating mode, a piston is slidably connected to the interior of the sliding pipe, and a sliding rod is fixedly connected to the upper side of the piston; then gas is injected into the gas storage tank, so that the pressure value in the gas storage tank is kept in a state that the middle part of the elastic film is bulged and the to-be-detected film is bent when the elastic film is bulged, and then the electrode stem is connected with an external digital source meter; the air permeability of the to-be-detected film can be tested according to the change value of the resistivity when the detection film is bent; the air permeability and the oxygen permeability of the membrane to be detected can be tested through the two testing methods of resistance detection and oxygen permeability detection, so that the testing result is more accurate.

The application relates to a fluid control structure suitable for micro flow channels, a first micro flow channel and a second micro flow channel are provided with a first position in close contact with each other, and the first position comprises a through hole; an elastic diaphragm or an elastic sheet is arranged at the through hole, and a bulk acoustic wave chip faces the through hole; when the bulk acoustic wave chip is in a working state, a jet flow force generated by the bulk acoustic wave chip driving liquid acts on the elastic diaphragm, a second part of the elastic diaphragm is displaced towards the direction of the second micro flow channel to expose the through hole, and the first micro flow channel and the second micro flow channel are communicated. A fluid control method is also provided. The application can realize more fine and flexible control of fluid flow or mixing in the micro flow channels.

The utility model provides a vibration assembly and an electret microphone. The vibration assembly comprises a vibration ring, a vibrating diaphragm, a gasket and a back pole plate which are sequentially arranged in an overlapped mode. The vibrating diaphragm comprises an elastic diaphragm and a conductive layer arranged on the elastic diaphragm. The vibrating ring comprises a conductive part, the conductive part comprises inner edge notches which are arranged at intervals in the circumferential direction of the inner edge of the vibrating ring, the vibrating diaphragm corresponding to the inner edge notches forms an insulating area, and the vibrating diaphragm in the insulating area is insulated from the vibrating diaphragm in a non-insulating area. According to the vibration assembly and the electret microphone provided by the invention, the parasitic capacitance can be effectively reduced, the sensitivity is improved, and the tone quality is improved.

The utility model discloses a sound wave ash removal device which is characterized in that sound outlet holes are formed in a sound production disc, a groove is formed in one end face of the sound production disc, an annular groove and a first abutting ring are arranged on the groove bottom wall of the groove, and an air inlet is formed in the sound production disc; the end cover is hermetically buckled at one end, provided with the annular groove, of the sounding disc, and the end cover is provided with an abutting ring II and an air hole; the elastic membrane is arranged in the groove, and the two end faces of the elastic membrane can be tightly attached to the first abutting ring and the second abutting ring in a sealed mode respectively. The small-caliber end of the horn tube is connected with the sound production disc and is communicated with the sound outlet hole; three connecting ends of the three-way pipe are respectively communicated with the air inlet, an external high-pressure air source and one end of the pressure regulating valve, and the other end of the pressure regulating valve is communicated with the air hole. According to the utility model, the elastic diaphragm can reliably produce sound in an earthquake; gas from an external high-pressure gas source can give a certain pressure to the elastic diaphragm after being subjected to pressure regulation of the pressure regulating valve, so that sound waves generated when the elastic diaphragm vibrates are stronger, and meanwhile, the gas supply pressure for driving the ash removal device can also be reduced.

The present application relates to the technical field of power plant induced draft fan detection, and particularly relates to a power plant induced draft fan sound and vibration combined measurement device, which comprises a measurement device body, the measurement device body comprises a detection head and a positioning seat, the detection head is detachably arranged at one side end of the positioning seat, a noise sensor is fixed at one side end of the positioning seat, a gravity sensor is arranged in the positioning seat, a plurality of elastic membranes are arranged at one side of the detection head close to the gravity sensor, the elastic membranes are attached to the surface of the gravity sensor, the detection head is provided with a through groove, the elastic membranes are located at one end of the through groove and close the through groove, and a gas sleeve for attaching to the outer surface of the induced draft fan is sealingly inserted into the other end of the through groove. The present application detects the related information of noise through the noise sensor, and for vibration, the impact force, impact amplitude and impact frequency in the vibration generation process can be detected through the gravity sensor and the corresponding auxiliary structure.

This invention provides a non-contact quartz-enhanced photoacoustic spectroscopy gas detection device, comprising: a gas chamber and a quartz tuning fork; the gas chamber includes: two gas buffer zones and an acoustic resonant cavity; a slit opening is formed in the middle of the acoustic resonant cavity, and the slit opening is filled by an elastic membrane; the quartz tuning fork is placed outside the gas chamber, and its vibrating arm is coupled to the elastic membrane on the acoustic resonant cavity, the two can be in contact or not; when a laser passes through the acoustic resonant cavity, under the action of photoacoustic effect, the sound wave excited by the laser beam forms a standing wave in the acoustic resonant cavity, and the sound wave signal corresponding to the standing wave passes through the elastic membrane to form a vibration wave, which drives the vibrating arm of the quartz tuning fork to vibrate; the vibration signal intensity of the quartz tuning fork vibrating arm is positively correlated with the gas concentration in the gas chamber, and the gas detection device can detect the gas concentration without the quartz tuning fork coming into contact with the gas. The device provided by this invention is of great significance for the detection of corrosive gases and dusty gases.