438 results about "Diaphragm structure" patented technology

The invention discloses a composite diaphragm for a battery and a preparation method thereof, belonging to the field of electrochemical cells. The composite diaphragm is a multilayer composite diaphragm structure composed of a conducting layer/a polymer layer or a conducting layer/a polymer layer/a conducting layer, wherein the conducting layer mainly comprises a carbon material or a conductive polymeric material and forms a film on a single surface or double surfaces of a polymer diaphragm. The composite diaphragm has the following characteristics: the conducting layer has strong electrolyte adsorption and storage capability, the process of ion transport is shortened, and large-current charge and discharge performance of the battery is improved; when the composite diaphragm is used in a metallic lithium battery, the conducting layer in the composite diaphragm contacting with metallic lithium can alleviate nonuniform corrosion on the surface of lithium and inhibit formation of lithium dendrite crystals. The preparation method for the composite diaphragm is simple and easily controllable, can realize large-quantity and low-cost industrial preparation of the composite diaphragm and has a high application value.

Provided are a piezoelectric element having high stability, which operates with high efficiency, and a method for manufacturing the piezoelectric element. The piezoelectric element (10) has a laminate structure in which a first electrode (14), a first piezoelectric film (16), a second electrode (18), an adhesion layer (20), an interlayer (22), a third electrode (24), a second piezoelectric film (26), and a fourth electrode (28) are laminated in this order on a silicon substrate (12). The interlayer (22) is formed of a material different from that of the second electrode (18) and has a thickness of 0.4 μm to 10 μm. A device having a diaphragm structure or a cantilever structure is formed by removing a part of the silicon substrate (12). The respective layers (14 to 28) laminated on the silicon substrate (12) can be formed using a thin film formation method represented by a vapor phase epitaxial method.

A reciprocating electromagnetic pump comprising a coil wound about a bipolar or tripolar core, a diaphragm structure mechanically coupled to at least one arm with a magnet attached to one end of the arm and a controller electronically connected to the coil. The arm is vibrated under the influence of a periodic electromagnetic field to produce flow. The flow of current through the electromagnet is interrupted so that the magnets are impelled during either a vacuum or a pressure stroke, but are not impelled during the reciprocal stroke. A microprocessor houses the controller which analyzes amplitude and frequency components of a signal produced in the electromagnet coil during the reciprocal stroke to provide a pump flow rate, a pumping efficiency, a pumping load and a height of the fluid column into which the pump mechanism is operating. The controller employs automatic feedback such that an operating frequency is controlled to match a self-resonant frequency of the pump and a coil current is controlled to a minimum value required to provide the desired flow. The microprocessor further comprises a pulse generator and a solid state switch that interrupts current flow through a pump electromagnet.

A diaphragm (14) is formed using MEMS technology. The diaphragm (14) has a hinge structure, and at least one of a hinge upper corner portion and a hinge lower corner portion of the diaphragm (14) is rounded.

The invention provides an optical fiber F-P multifunctional sensor based on a microporous optical reflection diaphragm. The optical fiber F-P multifunctional sensor based on the microporous optical reflection diaphragm is characterized in that the design of an F-P cavity structure formed by sequentially connecting a single-die optical fiber, an optical capillary tube and the microporous optical reflection diaphragm and a special microporous optical reflection diaphragm structure is adopted to develop a built-in optical fiber F-P multifunctional sensor which can highly sensitively detecting liquid refractive index, air humidity and ultrasound under common air pressure and external high pressure conditions. The sensor has a micro size, is simple in structure, integrated, high in sensitivity, fast to respond, high in resistance to electromagnetic interference, applicable to the fields of environmental monitoring, and biochemical detection and ultrasonic detection, has a good market prospect, and is high in market value.

A method of manufacturing an actuator comprises the steps of bonding a piezoelectric film formed on a single crystal substrate to a diaphragm structure member and removing the single crystal substrate therefrom to manufacture the actuator. The single crystal substrate is a substrate having bonded portions where a plurality of single crystal substrates are bonded together.

The invention relates to a pressure sensing die to be mounted on a base, comprising: a sensing structure comprising: a diaphragm structure with a deflectable sensing diaphragm whose deflection is representative of the pressure and sensing elements for detecting the deflection of the sensing diaphragm, a pedestal supporting the diaphragm structure, a linking structure for isolating at least some of the stresses caused by the mounting of the sensing die on the base from said deflectable sensing diaphragm, the linking structure being linked on one side to a bottom surface of the pedestal and to be linked, on an opposite side, to a top surface of the base, wherein the linking structure comprises at least one linking element extending between the base and the pedestal and having a mean cross-section smaller than the said bottom surface and top surface so as to constitute a small link between the base and the pedestal. The invention further relates to a method of manufacturing such a sensing die.

The invention concerns a pressure sensing die to be mounted on a base, comprising: a diaphragm structure with a deflectable pressure sensing diaphragm whose deflection is representative of the pressure and sensing elements for detecting the deflection of the sensing diaphragm; a pedestal supporting the diaphragm structure; wherein the pedestal is a composite pedestal comprising top and bottom platforms connected by at least one small link having a mean cross-section smaller than the cross-section of the top platform, said small link isolating at least some of the stresses, produced by the mounting of the pressure sensing die on the base, from said deflectable pressure sensing diaphragm.

A unitary sensor is provided that includes a frame upon which electrical and optical components may be disposed and a coating, such as an overmolded coating provided about the frame. The unitary sensor includes one or more diaphragm structures formed from thin regions of the coating material and disposed generally about at least one of the optical components. The diaphragm structure or structures allow the optical components to be separated, such as by application of an opposing force to the lateral sides of the sensor, such that the sensor may be placed on a patient. The sensor may thereby be placed on a patient's finger, toe, and so forth to obtain pulse oximetry or other physiological measurements.

A microphone system includes a diaphragm suspended by springs and including a sealing layer that seals passageways which, if left open, would degrade the microphone's frequency response by allowing air to pass from one side of the diaphragm to the other when the diaphragm is responding to an incident acoustic signal. In some embodiments, the sealing layer may include an equalization aperture to allow pressure to equalize on both sides of the diaphragm.

The invention provides a negative electrode plate for a lithium metal battery. Metallic lithium plates and sponges are compressed to obtain the negative electrode plate. The negative electrode plate has the advantages that the traditional lithium metal battery structures can be simplified when the negative electrode plate is applied to the lithium metal battery, electron barrier effects can be realized by sponge elastic interface layers instead of diaphragms, and volume change and the instability of interfaces inside the battery can be relieved by elastic interface materials in battery cycle;sponge medium layers are excellent in electrolyte solution wettability, and are high in thermal deformation resistance as compared with common polypropylene diaphragms; elastic three-dimensional framework structures of the sponges are favorable for inhibiting dendrite growth in lithium metal battery cycle procedures and relieving the volume change of negative electrodes, and accordingly further development of the lithium metal battery can be promoted from another angle by composite metal lithium negative electrodes which are designed by the aid of sponge materials and are free of diaphragm structures.

Proposed is a speaker in the monomer structure, including a single electret diaphragm structure, a single metallic electrode with a plurality of openings and a frame support. In an embodiment, the electret diaphragm structure is composed by stacking an electret diaphragm layer, a super thin metal film electrode and an insulating layer, wherein, the super thin metal film electrode is located between the electret diaphragm layer and the insulating layer. In another embodiment, the electret diaphragm structure is composed of an electret diaphragm layer and a conductive electrode layer with oxidation conductive material. The frame support is located between the electret diaphragm structure and the metallic electrode, forming a space for vibrating as an electret diaphragm structure, to producesound.

A micromechanical microphone structure configured as a layered structure includes: a semiconductor substrate; a diaphragm structure having an acoustically active diaphragm which at least partially spans a sound opening in the back side of the substrate and is provided with a movable electrode of a microphone capacitor, which diaphragm structure has openings via which pressure compensation occurs between the back side and the front side of the diaphragm; a stationary acoustically permeable counterelement having vents, which counterelement is situated in the layered structure above the diaphragm and which functions as a carrier for a nonmovable electrode of the microphone capacitor; and at least one ridge-like structural element which is situated at the outer edge area of the diaphragm, and which protrudes from the diaphragm plane into corresponding recesses in an adjoining layer.

A thermal fluid flow sensor having a diaphragm structure body configured by an insulating film formed by stacking a film having compressive stress and a film having tensile stress on the top and bottom of a temperature-measuring resistive element and a heater resistive element which are processed by microprocessing is provided. The insulating film at a lower layer of the heater resistive element, a temperature-measuring resistive element for heater resistive element, upstream temperature-measuring resistive elements, and downstream temperature-measuring resistive elements, has films having compressive stress (a first insulating film, a third insulating film, and a fifth insulating film) and films having tensile stress (a second insulating film and a fourth insulating film) being alternately arranged, and two layers or more of the films having tensile stress are arranged.

A capacitive MEMS microphone structure is provided, which micromechanical microphone structure of component is realized in a layer construction and includes: a diaphragm structure sensitive to sound pressure, which is deflectable in a direction perpendicular to the layer planes of the layer construction; an acoustically penetrable counter-element which has through holes and is formed above or below the diaphragm structure in the layer construction; and a capacitor system for detecting the excursions of the diaphragm structure. The diaphragm structure includes a structural element in the middle area of the diaphragm structure, which structural element projects perpendicularly from the diaphragm plane and which, depending on the degree of excursion of the diaphragm structure, variably extends into a correspondingly formed and positioned through hole in the counter-element.

The invention provides a lithium double-fluid flow battery, which comprises a porous positive current collector, a positive reaction cavity, a diaphragm, a metal lithium negative plate, a negative reaction cavity, a positive suspension and a negative electrolyte, wherein a gap with a certain distance exists between the diaphragm of the battery and negative metal lithium; the gap is fully filled with the negative electrolyte which continuously or intermittently flows; and a solid-liquid composite dual-diaphragm structure is formed by the diaphragm and the negative electrolyte. Through continuous or intermittent washing by the electrolyte, the problem of potential safety hazards caused by lithium dendrites generated by a metal lithium negative electrode in charge-discharge processes is solved; and meanwhile, the lithium double-fluid flow battery plays roles in purifying the negative electrolyte, cleaning the diaphragm and adjusting the concentration of the positive suspension.

The invention discloses an energy-adjustable infrared target simulation system, which belongs to the field of optical techniques, and relates to a broadband and energy-adjustable-continuously infrared target simulation system. The infrared target simulation system comprises a black body 1, an energy diaphragm 2, a lighting lens 3, an infrared dodging system 4, an infrared target 5 and a projection lens 6, wherein the infrared radiation emitted by the black body 1, after passing through the energy diaphragm 2 and being collimated by the lighting lens 3, enters the infrared dodging system 4; then, after being dodged by the infrared dodging system 4, the infrared radiation enters the infrared target 5 and finally is collimated and outputted by the projection lens 6. The emergent face of the black body 1 is arranged on the focal plane of the lighting collimating lens 3; and the infrared target 5 is arranged on the focal plane of the projection lens 6, and the emergent energy of the target is controlled by the energy diaphragm 2, when the diaphragm largens, the system energy increases, and when the diaphragm is reduced, the system energy decreases. According to the invention, the energy adjustment on an infrared target simulator is performed by using a diaphragm structure, so that the continuous change of infrared broadband energy can be realized, therefore, the system can carry out simulation test on the infrared systems under different energy requirements.

The invention discloses an integrated optimization method of static strength, rigidity, stability of a wallboard structure. In an optimization design process, apart from conventional static strength and rigidity, an integrated stability determination coefficient of the wallboard structure is introduced as a constraint condition, i.e., in an iteration process, automatic calculation and determination are performed on multiple instability modes including wallboard rib compression stability, pressing damage strength, compression stability of a skin diaphragm structure, cutting stability, integrated wallboard stability and the like, minimization of the total weight of the structure is taken as an object, dimension parameters of the wallboard structure are optimized, under the condition that the static strength, the rigidity and the integrated stability performance of the wallboard structure after the optimization satisfy design requirements, the weight of the structure is the lightest, recalculation on various stability of the structure after conventional engineering design and optimization is avoided, the problems of increased calculation cost and design change risks which are caused by using a conventional method are solved, and the design efficiency is substantially improved.

The invention provides a colloidal electrolyte super capacitor adopting a reticular diaphragm. The colloidal electrolyte super capacitor is characterized in that the reticular diaphragm is adopted to replace a conventional diaphragm; the reticular diaphragm is located between a positive electrode and a negative electrode, so that the positive electrode and the negative electrode can be separated from each other; and channels of positive electrode and negative electrode active materials are filled with colloidal electrolyte and are communicated with each other through holes of the reticular diaphragm, and therefore, electrolyte ion migration channels can be formed. The reticular diaphragm is adopted, and therefore, short circuit of the positive electrode and the negative electrode can be avoided, and the transfer resistance of electrolyte ions between the positive electrode and the negative electrode can be effectively decreased. Compared with a super capacitor without a diaphragm structure and colloid electrolyte, the super capacitor of the invention has the advantages of high security and diverse packaging modes; and compared with a colloidal electrolyte super capacitor adopting a conventional diaphragm such as polypropylene non-woven fabric, the colloid electrolyte super capacitor adopting the reticular diaphragm has the advantages of low internal resistance and high power density.

The invention discloses a cold diaphragm with a light blocking ring structure. The invention is characterized in that two light blocking rings are reasonably added into the internal wall of the cold diaphragm, and the surfaces of the light blocking rings are coated with a layer of black coating with excellent performance, thus effectively reducing stray light. The design can excellently improve the signal-to-noise ratio of the system, enhances the contrast ratio and improves the exploring and recognizing capacities of the whole system. Compared with cold diaphragms without the light blocking ring structure, the invention can effectively reduce stray light, and causes point source transmittance PST value to be attenuated corresponding to several orders of magnitude, the manufacture is easy, and the cost is low, thus being suitable for any cold diaphragm structures.

A sensor design, respectively a micromechanical sensor structure for capacitive relative-pressure measurement, that will allow very small pressure differentials to be reliably recorded at high absolute pressures even in harsh, particle-laden measuring environments. For that purpose, the micromechanical sensor element includes a deflectable diaphragm structure which is provided with at least one deflectable electrode, and a fixed support structure for at least one fixed counter-electrode which is located opposite the deflectable electrode. The diaphragm structure includes two mutually parallel configured diaphragms that are joined rigidly to one another via at least one connecting crosspiece, so that each application of force to one of the two diaphragms is directly transmitted to the respective other diaphragm. The first diaphragm is able to be pressurized by a first measuring pressure emanating from the front side of the sensor element, and the second diaphragm is able to be pressurized by a second measuring pressure emanating from the rear side of the sensor element. The fixed counter-electrode is located in the sealed volume between the two diaphragms of the diaphragm structure.