15 results about "Circular diaphragm" patented technology

The invention relates to a motor vehicle seat headrest (1), comprising two loudspeakers (5), each with a circular diaphragm (6), mounted on a support (7) and housed in two compartments (8). The support comprises two box-shaped parts (9) in which each loudspeaker is mounted. Each loudspeaker is covered by a front panel (19) having a multi-perforated area (10) extending opposite its diaphragm (6). A single cylindrical duct (11) is formed in a housing (3) opposite the multi-perforated area. The duct has a diameter of less than 35 mm and is free of filler material. A cap (4) covers the duct and has, opposite the duct, a circular air-permeable area (12) with a diameter similar to that of the duct. Figure 2

The variable area flowmeter based on the H-shaped opening and the arc parting line is characterized in that the variable area flowmeter comprises a pipeline assembly, a flexible thin film assembly and a pressure tapping connector; the pipeline assembly comprises a flowmeter upstream pipeline and a flowmeter downstream pipeline. The two ends of the pipeline assembly are the air inlet end and the air outlet end respectively. A circular diaphragm is placed in an upstream pipeline of the flow meter and is mounted in a direction perpendicular to the air flow direction; gas can only flow through the throttling opening area of the diaphragm; the flexible thin film assembly comprises a circular diaphragm; the pressure tapping interface comprises a flowmeter upstream pressure tapping hole and a flowmeter downstream pressure tapping hole; a flowmeter upstream pressure tapping hole and a flowmeter downstream pressure tapping hole are formed in the upstream position and the downstream position of the pipeline assembly respectively and matched with a pressure sensor to measure the static pressure difference before and after gas passes through the circular film. The gas flow sensor is simple in structure and convenient to process, and can realize low-pressure-loss, high-sensitivity and wide-range gas flow measurement.

This invention discloses a highly sensitive detection device and method for immersion-type ultrasonic signal detection in liquids. The invention provides a circular diaphragm with concentric corrugations and a center-thinned structure, and uses this diaphragm as a reflective surface of an optical interference cavity to construct a highly sensitive detection device for immersion-type ultrasonic signal detection in liquids. The diaphragm, used to sense ultrasonic signals, has identical concentric corrugations and a center-thinned structure on both sides, enabling the diaphragm to achieve higher mechanical sensitivity without significantly reducing its natural frequency. The concentric corrugations effectively release initial residual stress introduced during processing and packaging, reducing surface warping and baseline drift. Simultaneously, a replaceable acoustic membrane is constructed in front of the diaphragm, achieving high sound transmission and anti-contamination under long-term immersion in liquid conditions. This detection device can be directly placed in the liquid for detection, improving the sensitivity of ultrasonic signal detection while maintaining a wide frequency range, preventing contamination of the detection element, and ensuring the long-term stability of the detection device.

The invention discloses a circular diaphragm wall anchorage design method and system based on a wall side soil resistance space, and the method comprises the steps: taking a circular diaphragm wall anchorage foundation as a core, integrating a related structure and a surrounding soil body to form an integral calculation system, and determining boundary conditions, load types and mechanical parameters through combining investigation, test and numerical analysis results, and establishing a space stress calculation sketch. Vertical distribution of horizontal resistance coefficients is defined in a buried depth related mode, annular soil resistance distribution of front wall non-uniformity and rear wall attenuation type non-uniformity is quantified, and three-dimensional space characteristics are defined. A mud cake reduction coefficient determined according to a soil body type, an anti-arch reduction coefficient determined according to rock body characteristics and the like are fused, a soil pressure calculation formula is deduced based on a static balance principle and an elastic foundation beam theory, deformation and internal force distribution are solved, structural parameters are adjusted, and a safe and economical design scheme is completed. And technical support is provided for anchorage foundation engineering under complex geological conditions.

The utility model provides a shape memory alloy diaphragm type compartment device. The shape memory alloy diaphragm type compartment device comprises a supporting piece, a shape memory alloy diaphragm and a heat-proof layer, wherein the shape memory alloy diaphragm is installed on the supporting piece, and a heat-proof layer is arranged on the surface of the side, away from the supporting piece, of the shape memory alloy diaphragm; and the shape memory alloy diaphragm is a circular diaphragm formed by splicing a plurality of fan-shaped shape memory alloy single sheets. The utility model further provides an engine. The shape memory alloy diaphragm type compartment device is simple in structure, light in weight, high in forward pressure bearing intensity, capable of being opened in the reverse direction, reliable in sealing, good in heat insulation performance and capable of reliably achieving the intermittent working function of a solid engine.

This invention relates to a method, system, equipment, and medium for calculating the vertical bearing capacity of a hollow circular diaphragm wall. The method includes: obtaining basic parameters of the circular diaphragm wall, including the perimeter of its inner and outer sides, the wall end area, the standard value of its ultimate end resistance, and the thickness and ultimate lateral resistance standard value of each soil layer within the depth range of the circular diaphragm wall; based on these basic parameters, calculating the vertical ultimate bearing capacity of the circular diaphragm wall using the bearing capacity calculation formula: where is the vertical ultimate bearing capacity of the circular diaphragm wall, is the perimeter of the outer side of the circular diaphragm wall, is the perimeter of the inner side of the circular diaphragm wall, is the standard value of the ultimate lateral resistance of the i-th soil layer on the wall side, is the standard value of the ultimate end resistance, is the thickness of the i-th soil layer around the wall, is the wall end area, is the inner side friction coefficient, and is the wall end resistance correction coefficient. This invention can calculate the vertical bearing capacity of a circular diaphragm wall with a hollow interior, better reflecting actual working conditions.

Herein disclosed is a membrane (12) for a pressure measurement device (10) comprising an elastic circular diaphragm (120) for sealing one side of the pressure measurement device (10) so as to define a space between the interior and exterior of the pressure measuring device; wherein, the elastic circular diaphragm (120) is fixed horizontally on the surface of the chamber of the pressure measurement device (10) through a peripheral portion of the membrane (12) away from its center; and the elastic circular diaphragm (120), when there is no pressure difference between the pressure acting respectively on the inner surface (121) and on the outer surface (122), is flat. Also disclosed are a pressure measurement device and an extracorporeal blood circuit.

A loudspeaker driver or tweeter (e.g., 100, 200 or 300) having a voice coil connected with a loudspeaker diaphragm (e.g., 106, 206 or 306), having a substantially circular diaphragm portion which is connected with or rests upon a voice coil attachment segment (e.g., 104, 204, 304). The diaphragm also includes a first central elliptical (non-circular-shaped) inner roll portion (e.g., 112, 212, 312) defining a central recessed area and a second, outer elliptical (non-circular-shaped) roll portion (e.g., 108, 208, 308) so the central portion and the outer roll portion that have substantially elliptical edge circumferences with substantially circular central peripheral edges to define diaphragm segments with a varying radial Chord lengths having non-uniform diameter dimensions (inside diameter to outside diameter) and when in use, the excursion of the diaphragm is controlled such that any breakup modes are minimized and the associated resonances are minimized.

The utility model relates to a sensing assembly used for a pressure sensor, the sensing assembly (1) comprises a channel housing (2) which is used for introducing a fluid medium and is provided with a hollow cylindrical cavity (3), one end of the channel housing (2) is sealed by a circular diaphragm (4) which is integrally formed with the channel housing (2); the diaphragm (4) can be deformed under the action of the fluid pressure of the fluid medium, the diaphragm (4) is provided with at least one strain gauge (8) in the radial direction on the side (4b) facing away from the fluid medium, and each strain gauge (8) comprises at least two varistors (8a, 8b) extending in the radial direction. In the utility model, in order to overcome a series of process problems caused by the thinning of the diaphragm, a circular bulge (5) is arranged in the middle on one side (4a) of the diaphragm, which faces a fluid medium. In addition, the utility model relates to a pressure sensor comprising the sensing assembly.

The application discloses a kind of diagnostic system and method for measuring low wave number turbulence of magnetic confinement fusion device, including gold film plane mirror, for changing the direction of mixed light formed by main laser and scattered light coupling;Zinc sulfide lens, for changing the proportion of main laser and scattered light in mixed light to beam separation;Aluminum alloy baffle, for shielding most of the high-power main laser emitted;First circular diaphragm, for selecting low wave number range mixed light and controlling power size;Second circular diaphragm and third circular diaphragm, for shielding stray light, collimating optical path and matching mixed light into detector;Focusing lens, for focusing mixed light emitted and propagated along a particular direction;Tellurium cadmium mercury detector, for receiving plasma scattered light signal in a particular direction.The application can realize the measurement of low wave number turbulence in magnetic confinement fusion device by using special coated zinc sulfide lens to control the ratio of light reflection and transmission to separate main laser and scattered light.

The invention relates to a headrest (1) for a motor vehicle seat, said headrest comprising an auxiliary module having two lateral parts (7), each lying in a reference plane (P), said lateral parts being fitted with two lateral cushions (9) comprising a padding block (10) and an air-permeable covering layer (11), and a sound transmission device comprising two loudspeakers (12) mounted respectively on each of said lateral parts, said loudspeakers each having a circular diaphragm (13), the loudspeaker (12) being mounted in a housing (14) defining a rear acoustic cavity (15) and being provided with a circular opening (25) opening forward, the periphery of said diaphragm being sealed to the periphery of said opening, the housing (14) extending forward from the reference plane (P), said padding block being provided opposite said opening with a conduit (16). Figure 1b

This invention relates to a diaphragm (12) for a pressure measuring device, comprising a resilient circular diaphragm (120) for sealing one side of the pressure measuring device (10), thereby forming a gap between the interior and exterior of the pressure measuring device; wherein the resilient circular diaphragm (120) is horizontally fixed to the surface of the chamber of the pressure measuring device (10) via a peripheral portion of the diaphragm (12) away from the center; and the resilient circular diaphragm (120) is flat when there is no pressure difference between the pressures acting on the inner surface (121) and the outer surface (122), respectively. The invention also relates to a pressure measuring device and an extracorporeal circulation tubing, which are manufactured using simple and reliable technology, saving materials and manufacturing costs while maintaining accurate pressure measurement.

This invention discloses a wave-fin robot based on a ring oscillator logic pneumatic circuit, belonging to the field of soft robot technology. The robot includes an outer shell, a connecting bracket, a ring oscillator composed of an odd number of fluid valves connected end-to-end, fins that drive correspondingly to each fluid valve, and flexible wave-fin surfaces fixed to the fins. Each fluid valve adopts a rigid-soft hybrid structure, utilizing the synergistic deformation of a semi-circular diaphragm and a flexible hose to form a fluid inverter, whose output state is logically opposite to the input control state. Under pressure from a single continuous pressure fluid source, the ring oscillator automatically generates periodic oscillations with a phase difference without external electronic timing control signals. The drive connecting rods of each valve, via limiters, drive the fins to swing sequentially, thereby driving the flexible fin surfaces to generate continuous traveling waves, achieving propulsion.

The invention discloses a high-sensitivity detection device and method capable of detecting ultrasonic signals in liquid in an immersion mode. The invention provides a circular diaphragm with concentric corrugations and a thinned center and a high-sensitivity detection device which is constructed by taking the diaphragm as a reflecting surface of an optical interference cavity and can be used for detecting ultrasonic signals in liquid in an immersion manner, the diaphragm is used for sensing the ultrasonic signals, and two surfaces of the diaphragm are provided with the same concentric corrugations and a thinned center structure; the diaphragm can obtain higher mechanical sensitivity on the premise that the inherent frequency is not obviously reduced; the concentric ripples effectively release initial residual stress introduced in the processing and packaging process, and surface shape warping and baseline drift are reduced; and meanwhile, a replaceable sound transmission membrane is constructed in front of the membrane, so that high sound transmission and pollution resistance under the condition of long-term immersion in liquid are realized. The detection device can be directly placed in liquid for detection, the sensitivity of ultrasonic signal detection is improved, the frequency range is considered, a detection element is prevented from being polluted, and the long-term stability of the detection device is ensured.

The utility model provides a servo supporting device for a circular foundation pit, which comprises a plurality of arc supporting beams which are arc section profile steel and form a supporting circular ring, and the supporting circular ring is positioned on the inner side of a circular diaphragm wall; the multiple hydraulic connector boxes are correspondingly arranged at the joints of the adjacent arc supporting beams, and each hydraulic connector box is correspondingly connected with the arc supporting beams on the two sides; the gap liner layer is arranged between the supporting circular ring and the circular diaphragm wall; and the hydraulic pump station is connected with the hydraulic joint box. The servo supporting device for the circular foundation pit can provide stable and reliable support for the circular foundation pit, and has the advantages of being short in construction period, easy to disassemble and the like.