37 results about "Membrane tension" patented technology

An electrostrictive polymer actuator comprises an electrostrictive polymer with a tailorable Poisson's ratio. The electrostrictive polymer is electroded on its upper and lower surfaces and bonded to an upper material layer. The assembly is rolled tightly and capped at its ends. In a membrane structure having a membrane, a supporting frame and a plurality of threads connecting the membrane to the frame, an actuator can be integrated into one or more of the plurality of threads. The electrostrictive polymer actuator displaces along its longitudinal axis, thereby affecting movement of the membrane surface.

The invention provides a cable membrane greenhouse and a building method thereof. The cable membrane greenhouse comprises cable membrane supporting structures, cable membrane tension structures and a cable membrane enclosure structure. The cable membrane supporting structures extend in a horizontal linear shape. One or more groups of cable membrane supporting structures are arranged, and each group of cable membrane supporting structures comprises one or more cable membrane supporting structures. A plurality of cable membrane supporting structures are arranged on the same vertical face. The cable membrane tension structures extend in a horizontal linear shape, or extend in a heaving and dipping mode in the horizontal direction. The cable membrane enclosure structure is of a structure integrally formed by a plastic membrane and a plurality of parallel inhaul cables in parallel. The cable membrane greenhouse is more reasonable in structure, the windproof and heat preservation performance of the cable membrane greenhouse are improved through the cable membrane enclosure structure, the cable membrane supporting structures and the cable membrane tension structures, the cable membrane greenhouse is larger in space and span, and a ventilation structure is simple and easier to operate; meanwhile, great consumption of steel arch structures and membrane pressing structures are avoided, the great cable membrane greenhouse building cost is saved, and manpower and material resources are saved.

The invention discloses a lithium ion battery negative plate. The lithium ion battery negative plate comprises a negative current collector and negative active substance layers distributed on two surfaces of the negative current collector, wherein at least one surface of each negative active substance layer is provided with a hot-press molten protruded point structure, and the distribution density of the protruded point structure is 0.1-10mg / 1540.25mm<2>. By utilizing the protruded point structures arranged on the lithium ion battery negative plate, a buffer gap is provided between the negative plate and a diaphragm layer so as to relieve an expansion force generated during continuous expansion of the negative plate in a cycle process and an insulation membrane tension force generated during winding, so that the cycle life of a lithium ion battery can be prolonged, and the safety performance of the lithium ion battery can be improved; and by utilizing the buffer gap, a high-speed channel is provided for the infiltration of electrolyte into the negative plate, so that the standing time after liquid injection of the lithium ion battery can be shortened. Besides, the invention further discloses the lithium ion battery adopting the lithium ion battery negative plate.

The invention discloses a constant force coiling machine for MH-Ni dynamic cylinder battery coiling, comprising a frame and a device baseplate provided with a battery pole plate base, a membrane base, a pole plate guiding mechanism and a pin mechanism. The device controls a magnetic powder brake by membrane tension to realize membrane constant tension control, controls the coiling compressing mechanism by PLC to realize constant tension coiling and adopts the telescopic pole plate guiding mechanism to ensure flatness of an core end surface of the coiling as well as arranges a membrane grasping mechanism to realize an automatic feed in of a positive and a negative membrane. In the coiling process, under a circumstance that a diameter of the core of the coiling ranges up and down and degrees of tightness of the coiling core in and out are consistent, the constant force coiling machine, is flat at the end surface and low labor intensity in the operation personnel and great in product quality.

The invention belongs to the field of steel structure buildings and particularly relates to a transverse-moving folding type membrane structure retractable roof and an open-close method. The transverse-moving folding type membrane structure retractable roof comprises a plurality of independent steel trusses, a foldable film and an open-close system. The open-close system comprises rail systems, driving trolley systems, transmission systems, membrane tension limiting systems and buffer systems. Under control of an electrical system, the trusses are expanded and retracted sequentially along arc-shaped rails through the open-close systems, and thus folding type opening and closing of the roof are achieved. The transverse-moving folding type membrane structure retractable roof is reasonable instructural design, easy to mount, light in roofing structure, reliable in open-close mode and suitable for a roofing system in the small-span space structural form.

The invention discloses a membrane tension test method and device based on thin membrane resonance, which relate to the technical field of material mechanics experiments. The device is composed of three parts of measurement, a sound source and data acquisition and analysis. The test method mainly comprises the following steps: A, the measurement device is placed on the membrane of the membrane structure to form a test area with a fixed size; B, sound waves generated by the sound source device are used to excite the membrane in a non-contact mode, and the data acquisition and analysis system isadopted to test the membrane resonance frequency f1 and the corresponding formation band number m1 and n1 in the test area; C, the measurement device is rotated for 90 DEG to change the size of the test area, and the test is repeated to obtain a different frequency f2 and the corresponding formation band number m2 and n2; and D, according to a formula, data measured in two tests are substituted to obtain tension values of Tx and Ty per linear meter of the longitude-latitude two-direction membrane. According to the test method and the tester provided in the invention, membrane resonance is generated based on sound wave excitation, defects of directly measuring the membrane tension traditionally can be avoided creatively, and the measurement precision is good.

The invention discloses a stretched membrane feeding tension control device, which comprises an installing frame and a stretched membrane unreeling shaft. The stretched membrane feeding tension control device is characterized in that a tension control roller is arranged in a feeding guide roller and is arranged at an upper swinging end of a swinging rod, the winging rod is fixedly arranged on an eccentric shaft, the eccentric shaft is rotationally arranged on the installing frame, the eccentric shaft is reset through a torsion spring arranged at the shaft end of the eccentric shaft or is reset through a tension spring regulating component arranged at the lower end of the swinging rod after rotating, a slide seat capable of leftwards and rightwards sliding is arranged at the side edge of the installing frame, one end of the slide seat is provided with a brake block to be aligned with a brake wheel arranged at the shaft end of the stretched membrane unreeling shaft, the other end of the slide seat is provided with a brake spring, a slide moving window is arranged on the slide seat, a slide block and a rolling bearing are movably arranged in the slide moving window, and an eccentric shaft head of the eccentric shaft is arranged in an inner hole of the rolling bearing in a sheathing way. The stretched membrane feeding tension control device has the advantages that the accurate control of the tension force during the stretched membrane reeling feeding can be realized, and in addition, the precise control on the feeding length during the lower aligning work of a stretched membrane can be realized.

A membrane tension measuring apparatus comprises: a rectangular frame (5) adapted to be abuttable on a surface (4) of a membrane (2) to which tension (Tx, Ty) is applied; an acoustic wave generator (17) operable to emit an acoustic wave (16) toward a part (2a) of the membrane (2) surrounded by the frame (5); a vibration detector (24) operable to detect vibration which is induced in the part (2a) of the membrane (2) by the emitted acoustic wave (16); and a processor (29) operable to calculate the tension (Tx, Ty) based on vibration data detected by the vibration detector (24). Each of the acoustic wave generator (17), the vibration detector (24) and the processor (29) is mounted to the frame (5).

The invention discloses a membrane tension control device for a stacking machine. The membrane tension control device for the stacking machine comprises a base, a vertical plate assembly mounted on the base, a servo motor arranged on the vertical plate assembly, a membrane winding drum shaft mounted on the vertical plate assembly and connected with the servo motor, and a passing roller set used for guiding membranes and further comprises a membrane tension control mechanism. The membrane tension control mechanism comprises a guiding sliding rail mounted at the front end of the vertical plate assembly, a moving seat mounted on the guiding sliding rail, a floating roller set mounted on the moving seat, an air cylinder mounted at the rear end of the vertical plate assembly and used for driving the moving seat and the floating roller set to move on the guiding sliding rail, a potentionmeter and a pressure regulating valve mounted between the air cylinder and the moving seat. In the membrane tension control device of the stacking machine, the tension of the membranes is kept constant through the membrane tension control mechanism, the tension changing speed of the membranes keeps pace with the stacking speed, accordingly, the membranes stacked on pole pieces are flat and not liable to wrinkle, and are prevented from being pulled apart, and thus the quality is improved.

The invention discloses a novel diaphragm tension control roller which comprises an inner barrel and an outer barrel, wherein the inner barrel and the outer barrel are in mutual rotary connection, theinner barrel and the outer barrel are coaxially arranged, an adsorption space is formed between the outer surface of the inner barrel and the inner surface of the outer barrel, and the adsorption space is used for accommodating a diaphragm; a protection film is at least arranged on the outer surface of the inner barrel and in the adsorption space, the protection film can form an adsorption face,and the diaphragm is arranged on the adsorption face; a plurality of vacuum adsorption holes are formed in the surface of the inner barrel, and the vacuum adsorption holes are used for adsorbing the diaphragm. According to the novel diaphragm tension control roller disclosed by the embodiment of the invention, an adsorption area is increased by improving an amount of the vacuum adsorption holes, the diaphragm can be more stably arranged on the inner barrel, and follow-up operation is more facilitated. Meanwhile, the protection film can prevent the diaphragm from being scratched by the surfaceof the inner barrel in a tensioning or moving process, and the quality of the diaphragm is guaranteed.

A membrane tension measuring apparatus comprises: a rectangular frame (5) adapted to be abuttable on a surface (4) of a membrane (2) to which tension (Tx, Ty) is applied; an acoustic wave generator (17) operable to emit an acoustic wave (16) toward a part (2a) of the membrane (2) surrounded by the frame (5); a vibration detector (24) operable to detect vibration which is induced in the part (2a) of the membrane (2) by the emitted acoustic wave (16); and a processor (29) operable to calculate the tension (Tx, Ty) based on vibration data detected by the vibration detector (24). Each of the acoustic wave generator (17), the vibration detector (24) and the processor (29) is mounted to the frame (5).

The invention provides a guide membrane tension regulating device for a polaroid cutting machine. The guide membrane tension regulating device comprises a tension roller and limiting rollers arranged on the two sides of the tension roller in parallel. The vertical position of the tension roller is regulated through two lifting mechanisms arranged at the two ends of the tension roller. The two ends of each limiting roller are fixedly connected with the cutting machine through mounting boards. According to the guide membrane tension regulating device, the height difference between the limiting rollers and the tension roller is changed to regulate the tension of a guide membrane, collision damage caused by small tension of the guide membrane is greatly reduced, and meanwhile the time for replacing guide membranes again is saved.

The device consists of circuit board, contact and contact block made of material which is attracted to each other as well as base to bear the contact block. The contact is moved above the contact block when the device is used. The contact block is moved up under action of magnetic force and to press against two connection contacts to switch on the line and the line is off when the contact is moved to someother place for from above the contact block because the magnetic force is disappeared and the contact block is fallen down under action self-gravity and plastic membrane tension.

A pre-stressed structure and a method for forming a pre-stressed structure are provided. The pre-stressed structure comprises a panel including a first region pre-stressed into a condition of membrane tension, resulting in the panel having increased transverse stiffness. The pre-stressed structure may further comprise a second region pre-stressed into a condition of membrane compression. The panel may be a plate or a shell and may form part of an insulating glass unit, which in turn may form part of a curtainwall unit.

The invention discloses a membrane tension automatic adjustment device and an air-cushion machine containing the same. Along with operation of a system, the radius of a coiled membrane is reduced gradually, and under the same friction force, the membrane tension is enlarged, and the membrane putting speed is reduced; the right end of a swing rod swings upwards, the left end of the swing rod swings downwards, the compression amount of a compressed spring is reduced, and the friction force between a friction pillar and a friction disc is reduced; the rotation speed of a roller is increased, the membrane putting seed is increased, the tension of the membrane at a compression bar is reduced, and the balanced state is reached; when the tension of the membrane is reduced, the right end of the swing rod swings downwards, the left end of the swing rod swings upwards, the compression amount of the compressed spring is increased, the friction force between the friction pillar and the friction disc is increased, the rotating speed of the roller is lowered, the membrane putting speed is reduced, the tension of the membrane at the compression bar is enlarged again, and the balanced state is reached again; and the coiled membrane always operates under relatively constant tension, the tension of the coiled membrane at the compression bar is adjusted automatically, and it is guaranteed that the membrane amount of the coil membrane conveyed to the air-cushion machine in unit time can maintain a relatively constant range.

The invention provides a quantitative characterization method of cell membrane tension, which combines a cell membrane tension model and a cytoplasm viscoelasticity model, and performs quantitative characterization on the cell membrane tension by using an atomic force microscope. The method specifically comprises the following steps: (1) obtaining single cell force relaxation signal data based on an AFM nanoindentation experiment; (2) constructing a cell power relaxation curve equation; and (3) quantitative calculation of cell membrane tension. The detection means for quantitatively detecting the membrane tension of the living cells, provided by the invention, is helpful for people to have further deeper understanding on cell behaviors, and also provides a new view angle and direction for people to carry out early diagnosis, regulation and treatment on various diseases by regulating the physical characteristics of the cells.

The invention belongs to a field of equipment related to flexible film coiling conveying and discloses a flexible film tension detecting roller. The flexible film tension detecting roller includes a total tension detecting assembly and a tension distribution detecting assembly connected together integrally in the horizontal direction. The total tension detecting assembly is in the form of a pedestal and the pedestal core shaft of the total tension detecting assembly is provided with a plurality of tension sensors, which are used for real time detection of total tension during a flexible film conveying process, along the peripheral direction. The tension distribution detecting assembly is in the form of a roller and is formed by connecting a plurality of roller units in a head-to-tail manner, wherein each roller unit realizes magnetic connection and successive power supply through structural design and flexible sensors are distributed on the axial direction and the peripheral direction of the rollers. In this way, tension distribution detection of areas corresponding to the roller units independently can be performed. By adopting the detecting roller provided by the invention, synchronous high precision measurement of total tension and tension distribution in the flexible film coiling conveying process can be realized in a compact-structure and convenient-to-operate way and the detecting roller provided by the invention has advantages of good adaptability and reliability.

The invention is entitled nacelle fan cowl tangential restraint. Systems and methods are provided for an aircraft propulsor (108) with a fan cowl with one or more tangential restraints. The tangentialrestraints may be configured to contact one or more tangential receiving portions of a fixed portion of the aircraft propulsor (108). The fan cowl may receive a load that may include a bending load.The tangential restraints may be configured to convert the bending load to membrane tension and thus decrease deflection of the fan cowl.

The invention relates to reasonable arch axis of an open web deck type arch bridge and a determination method thereof. The determination method comprises the following steps: dividing a dead load of the open web deck type arch bridge into dead weight of a bridge deck system, dead weight of a column and dead weight of a main arch ring; serializing the discrete dead weight of the column to a continuous load in a linear relationship with coordinates of the main arch ring by equivalent membrane tension assumption; serializing a discrete concentrated force transferred to the main arch ring by the bridge deck system to a horizontal uniformly distributed load; and linearly combining three pressure lines of the dead weight of the bridge deck system, the dead weight of the column and the dead weight of the main arch ring according to the proportions of the thrusts in total thrust by analyzing the pressure lines of the dead weight of the bridge deck system, the dead weight of the column and thedead weight of the main arch ring and the thrust of the main arch to obtain the reasonable arch axis of the open web deck type arch bridge. The reasonable arch axis is clear in mechanical concept andsimple in method, and the reasonable arch axis of the open web deck type arch bridge can be determined quickly, so that the workload of bridge designers is reduced greatly. The arch bridge is reasonable in stress and economical in material utilization amount.

The invention discloses a hydrophilic interface selection system and method for absorbing and holding biological tissues. The method comprises the following steps: acquiring a liquid membrane tensionparameter of each prepared hydrophilic interface and a safety range of the liquid membrane tension of the biological tissues to be absorbed and held; comparing the safety range of the liquid membranetension with the liquid membrane tension parameter of each hydrophilic interface, and selecting the hydrophilic interface, in the safety range, of the liquid membrane tension parameter as a preferredinterface of the biological tissue, so that the liquid membrane tension of the selected hydrophilic interface is accurately controlled within the safety range; according to the invention, stable and non-invasive clamping and pulling of the interface and human tissue are realized by liquid membrane tension generated by the hydrophilic interface, and the technical problem that tissue damage and slippage are easily caused when the existing surgical instrument is used for clamping biological tissue is avoided.

A vertical bag forming, filling and packaging machine (1), comprising: a film supply part (5), a film bonding part (31), a longitudinal sealing part (60), a film conveying part (50), a film clamping device (34 ), film tension release part (20), filling part (70), metering part (40), transverse sealing part (80), cutter (80), wherein, described film joint part (31) and film (F) Combined, the longitudinal sealing part (60) forms the film (F) into a tube shape, the film clamping device (34) holds the film (F) at the film joint part (31), and the film tension releasing part (20 ) relaxes the film (F), the filling part (70) throws in the content (X), the metering part (40) measures the content (X), and the transverse sealing part (80) makes the film (F) form The bag (G), the cutter cuts the bag (G).

The invention relates to a membrane tension control induction type compression roller mechanism. The membrane tension control induction type compression roller mechanism comprises a fixed frame, a passive roller and a tension control roller, wherein the fixed frame is defined by an upper cantilever, a lower cantilever and two supports, and the passive roller and the tension control roller are fixed in the fixed frame. The two ends of the passive roller are clamped in rectangular hole grooves through passive roller fixing blocks. A passive shaft height control valve is arranged on the top face of each support, penetrates the corresponding rectangular hole groove through a screw and is in screw joint with the corresponding passive roller fixing block. The right end of the tension control roller is in drive connection with a tension controller, and the left end of the tension control roller is connected with a tension control knob. An upper fixed block is fixed to the front face of the upper cantilever and fixedly provided with the induction end of a membrane position inductor. A lower fixed block is fixed to the front face of the lower cantilever and fixedly provided with the transmitting end of the membrane position inductor. According to the membrane tension control induction type compression roller mechanism, the pressure between the two rollers is adjusted through the passive shaft height control valves, the membrane tension control induction type compression roller mechanism and the tension controller are used in common to adjust conveying tension, and therefore tension control is more accurate, and the problem that conveying is difficult due to the too large or small membrane pulling force is effectively solved.

The invention provides a cable membrane greenhouse and a building method thereof. The cable membrane greenhouse comprises cable membrane supporting structures, cable membrane tension structures and a cable membrane enclosure structure. The cable membrane supporting structures extend in a horizontal linear shape. One or more groups of cable membrane supporting structures are arranged, and each group of cable membrane supporting structures comprises one or more cable membrane supporting structures. A plurality of cable membrane supporting structures are arranged on the same vertical face. The cable membrane tension structures extend in a horizontal linear shape, or extend in a heaving and dipping mode in the horizontal direction. The cable membrane enclosure structure is of a structure integrally formed by a plastic membrane and a plurality of parallel inhaul cables in parallel. The cable membrane greenhouse is more reasonable in structure, the windproof and heat preservation performance of the cable membrane greenhouse are improved through the cable membrane enclosure structure, the cable membrane supporting structures and the cable membrane tension structures, the cable membrane greenhouse is larger in space and span, and a ventilation structure is simple and easier to operate; meanwhile, great consumption of steel arch structures and membrane pressing structures are avoided, the great cable membrane greenhouse building cost is saved, and manpower and material resources are saved.

The invention provides a building membrane structure pretension force measuring method and a measuring device thereof. The method comprises the steps of launching a particle bead to a tensioned membrane with a fixed boundary to vibrate the membrane which rebounds the bead; measuring the incident speed v0, the return speed vt, the membrane middle point maximum displacement (amplitude) Tmax and the bead mass m0 of the bead in the tensioned membrane with the same fixed boundary; changing the latitude and longitudinal directions, measuring Tmax, v0 and vt; according to the formula: pi<2>habTmax<2>[((sigma0x / a<2>)+(sigma0y / b<2>))+(pi<2> / 32)((Ex / a<4>)+(Ey / b4))Tmax<2>]=4m0(v0<2>-vt<2>), measuring two groups of Tmax, v0 and vt, to calculate the membrane tension force sigma0x and sigmax0y. The method is based on the membrane large deflection theory, to approach actuality theoretically and obtain high theory accuracy, having wide application for different membranes. The method can measure two orthogonal pretension forces of membranes and the tension force of a membrane under different loads. The invention can be quickly applied in actual projects. The measuring device has simple structure, low cost and simple application.

The invention discloses a high-throughput measurement device and method for single cell membrane tension. The device comprises a micro-fluidic chip module, a pressure control module, a multi-channel image acquisition module and a data analysis and processing module. The micro-fluidic chip module is used for carrying out cell separation and providing a multi-channel single cell measurement environment; the pressure control module is used for providing negative pressure and driving cells to move through the negative pressure; the multi-channel image acquisition module is used for acquiring cellimages; the data analysis and processing module is used for processing the images acquired by the multi-channel image acquisition module to obtain cell deformation; and based on the cell deformation and the pressure intensity of the negative pressure provided by the pressure control module, the tension of the cell membrane is obtained by adopting a single-cell cell membrane tension equivalent mechanical model. The device can effectively realize high-throughput measurement of the cell membrane tension of the single cell.

The invention discloses a hydrophilic interface for holding biological tissues, the hydrophilic interface is composed of a plurality of nano particles, and the liquid membrane tension calculated by the structural parameters of the hydrophilic interface meets the following conditions: the liquid membrane tension is greater than the maximum slipping force for holding the biological tissues and is less than the minimum damage force for holding the biological tissues; by precisely designing structural parameters of the hydrophilic interface, the liquid film tension of the manufactured hydrophilicinterface is precisely controlled between the maximum slipping force and the minimum damage force, so that the liquid membrane tension generated by the hydrophilic interface realizes stable and damage-free clamping and pulling of the interface and human tissues; the technical problem that when an existing surgical instrument clamps biological tissue, tissue damage and slipping are likely to be caused is solved.

The invention discloses a winding film tension adjustment device. The winding film tension adjustment device is characterized by comprising a base rod, a movable plate mounting part, multiple movable plates, a pressing plate and a knob handle, wherein a retainer ring is arranged on the peripheral surface of the base rod; the movable plate mounting part coats the base rod; the multiple movable plates are arranged in the movable plate mounting part; one end of each movable plate can extend out from the other end, corresponding to the retainer ring, of the movable plate mounting part; meanwhile, the other end of each movable plate can extend out from the side surface of the movable plate mounting part; the pressing plate can be butted against one ends of the multiple movable plates; and a thread rod is arranged at one end of the knob handle, penetrates through the pressing plate, and is in threaded connection with the base rod. The winding film tension adjustment device can effectively simplify the structure, improves the tension adjustment convenience and the tension stability to adapt to different tension demands, and guarantees the packing quality of winding films.

The invention discloses a hydrophilic interface manufacturing method and system for holding biological tissues. The method comprises the steps: obtaining the maximum slippage force and the minimum damage force of a biological tissue in advance, and selecting a force value which is greater than the maximum slippage force and is smaller than the minimum damage force as the tension of an optimized liquid film; determining an optimized structure parameter value corresponding to the optimized liquid film tension according to the relationship between the structure parameter of the hydrophilic interface and the liquid film tension, and manufacturing the hydrophilic interface according to the optimized structure parameter value, thereby realizing accurate design of the structure parameter of the hydrophilic interface. The liquid film tension of the manufactured hydrophilic interface is accurately controlled between the maximum slippage force and the minimum damage force, so that the liquid film tension generated by the hydrophilic interface realizes stable and non-damage clamping and pulling of the interface and human tissues, and the technical problems of tissue damage and slippage easilycaused when an existing surgical instrument clamps biological tissues are solved.

The device consists of circuit board, contact and contact block made of material which is attracted to each other as well as base to bear the contact block. The contact is moved above the contact block when the device is used. The contact block is moved up under action of magnetic force and to press against two connection contacts to switch on the line and the line is off when the contact is moved to someother place for from above the contact block because the magnetic force is disappeared and the contact block is fallen down under action self-gravity and plastic membrane tension.