34 results about "Membrane tension" patented technology

The invention relates to the technical field of ocean engineering deep-sea mining equipment, in particular to a track visbreaking and desorption method with an externally-attached protective film, which comprises a mine car track walking system, a track protective film, a protective film tensioning system and a jet cleaning system. The crawler belt walking system comprises a mine collecting car crawler belt and a matched car body, the crawler belt protective film comprises a mud surface lower protective film and a mud surface upper protective film, and the protective film supporting system comprises a protective film tensioning device, a protective film supporting device and a protective film guiding and monitoring device. Viscosity reduction and desorption of the deep sea mine collecting car are achieved through the externally-attached protective film by means of press-in, pulling-up, cleaning and press-in protective film circulation.

The utility model is applicable to the field of detection equipment, and provides a membrane filament tension detection device of an immersion type ultrafiltration membrane, which comprises a base plate and a locking cylinder, the base plate and the locking cylinder are fixedly arranged, the front end of the locking cylinder is rotatably provided with a torsion round tube, and the torsion round tube is connected to a torsion mechanism; a telescopic column is slidably inserted into the torsion round pipe in a penetrating mode, and a guide groove mechanism is arranged between the torsion round pipe and the telescopic column. When the membrane filament winding device is used, membrane filaments wind around three groups of arc-shaped grooves and then are wound on the winding roller, at the moment, the locking air cylinder drives the locking square rod to stretch into the locking square opening to fix the discharging roller and the winding roller, and the electric push rod drives the telescopic column to contract towards the interior of the torsion round pipe; the expansion tiles on the outer sides of the torsion round pipe and the telescopic column expand towards the outer side, then the membrane filaments on the outer sides of the expansion tiles are subjected to tension, the tension sensor on the output rod of the electric push rod can calculate the tension of the membrane filaments, and therefore the function of batch detection is achieved.

The invention relates to the technical field of structural design of constructional engineering, in particular to a large-span roof tensile membrane structure and a design method thereof. The large-span roof tensile membrane structure comprises at least two non-drainage boundaries and one drainage boundary, the tension film is tensioned between the non-drainage boundary and the drainage boundary; the non-drainage boundaries are located at the same elevation or at different elevations; the drainage boundary is in a concave arch shape. The tensile membrane structure does not need to depend on supporting components such as arches, cables and supporting rods, the negative Gaussian curved surface is formed by conducting concave design on the membrane boundary, the drainage path is formed in the concave direction, and organized drainage of the tensile membrane structure is achieved. Meanwhile, under the action of prestress, the membrane structure of the negative Gaussian curved surface has the structural rigidity meeting the use requirement. According to the corresponding design method, the sunken size of the outer boundary of the tensile membrane can be determined on the basis of roof structure geometry of different shapes. According to the stretch-draw membrane structure and the design method thereof, the influence and limitation of a traditional membrane structure model and an internal supporting component on the building effect can be avoided, the requirements for the transparent and light building effect are met to the maximum extent, and meanwhile water accumulation of the membrane structure is avoided.

The invention relates to a protective structure (1) for an outdoor shelter comprising a peripheral frame (2), a cover membrane (4) configured to extend at least partially inside an internal space (15), and a tensioning device (5) configured to tension the cover membrane (4) and comprising at least one hoop (3) mechanically connected to and supported by the peripheral frame (2). The at least one hoop (3) is rotatable relative to the peripheral frame (2) about an axis of rotation (A) between an installation position in which the at least one hoop (3) is not in contact with the cover membrane (4), and a use position in which the at least one hoop (3) is configured to rest against the cover membrane (4) and to protrude from the peripheral frame (2). Figure 1

This invention relates to a membrane tension compensation method based on the detection of uniformity in the thickness of water-soluble membranes produced by dishwashing pods. Addressing the problem that membrane thickness distribution is sensitive to nonlinear tension disturbances under high-speed operation conditions during water-soluble membrane production, and that traditional thickness control methods struggle to achieve precise closed-loop compensation, this invention proposes a method that continuously collects cross-sectional thickness information of the membrane material, constructs a time-space thickness sequence, extracts thickness gradient topological features, combines a multidimensional tension sensitivity feature vector with a dynamic thickness gradient topological graph, and uses a layer-by-layer sparsely connected lightweight graph convolutional network to infer the tension compensation amount. After median filtering and denoising, the result drives the actuator to adjust in real time, achieving high-precision closed-loop compensation for the uniformity of the water-soluble membrane thickness. This method improves the sensitivity and stability of thickness control under nonlinear disturbance environments, while also possessing both real-time performance and computational efficiency.

An apparatus and method for stretch wrapping of a palletized load uses film tension feedback derived from a film tension control load cell to control film dispensation. The load cell measures film tension and the film payout rates is determined by the film tension. Film tension values are used to determine when an out of bounds condition occurs, namely, when a film break has occurred, or when a possible film break is about to occur or when the film has been cut at the end of a wrapping cycle. To prevent film free end entanglement caused by a break, clamps engage the film so the film tail is controlled, eliminating the risk of recoil. The broken film tail may then be quickly and reliably reattached to the rotating load in a desired position.

The application discloses a mechanically sensitive nanomachine and a preparation method and application thereof. The nanomachine comprises a sensing module and a membrane tension response module. The sensing module is a nucleic acid nanopore structure. The membrane tension response module is connected to the sensing module. When the nanomachine is embedded in a membrane, the nanopore structure deforms when the membrane tension changes, and the membrane tension response module responds to the deformation and emits fluorescence corresponding to the membrane tension. The nanomachine has the advantages of high sensitivity, high time resolution, good biocompatibility and the like, and has a significant advantage in membrane tension fluorescence detection.

The utility model provides a membrane material feeding device which comprises a membrane stripping base, a membrane feeding mechanism and a membrane stripping mechanism are installed on the membrane stripping base, the membrane feeding mechanism comprises a discharging assembly and a rolling assembly, a membrane material is wound on the discharging assembly, and the membrane stripping mechanism comprises a membrane stripping knife, a membrane stripping driving assembly and a membrane stripping tension stabilizing assembly. The film stripping driving assembly is installed on the film stripping base, a film stripping knife is installed on the film stripping driving assembly, the film stripping tension stabilizing assembly comprises a first tension stabilizing piece, the first tension stabilizing piece is arranged between the base and the film stripping driving piece, and the first tension stabilizing piece is in butt joint with the outlet end of the film stripping knife. The first tension stabilizing part is arranged between the film stripping driving part and the film stripping base, so that a section of track opposite to the moving direction of the film stripping knife exists after the film material is stripped from the film stripping knife, the distance change between the film stripping knife and the winding assembly after the film stripping knife retracts is counteracted, and the included angle formed by the film material and the knife edge is always unchanged when the film stripping knife strips the film; and the tension at the tearing part of the film material and the protective film is kept constant during film stripping.

A method based on the combination of a particular osmotic swelling, an adapted and controlled plasma membrane lysis and removal, to produce the giant extracellular organelles vesicles, and use of the giant extracellular organelles vesicles to screen the activity of proteins or exogenous molecules, the method includes: contacting the cells during 0.5 to 30 minutes with an hypotonic aqueous medium with an osmolarity ranging from 0.1 to 100 mOsm / L; applying a membrane tension on cells ranging from 10−3 to 5 mN / m during 10−4 to 100 seconds; and collecting the giant extracellular organelle vesicles into the hypotonic aqueous medium.

A sound system having a sound-emitting body (1) comprising a fillable, viscoelastic hollow membrane (2). To achieve an improvement in the sound quality while at the same time keeping production costs low, it is proposed that the membrane tension of the viscoelastic hollow membrane (2) can be adjusted in dependence on the sound emission behaviour due to the filling pressure such that the overpressure in the hollow membrane (2) is preferably between 0.01 and 0.5 bar; and the sound system having a structure-borne sound transducer (4) which is vibrationally connected to the sound-emitting body (1).

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 method for promoting cells to ingest exogenous substances based on regulation and control of cell membrane tension, the method promotes cells to ingest exogenous substances by regulating and controlling the cell membrane tension, and the method for regulating and controlling the cell membrane tension is to change the elastic modulus of a cell inoculated substrate. Experimental results show that the stiffness of the substrate significantly affects the membrane tension of the cells, and the cell uptake ability is optimal under the moderate membrane tension. For different cell types and exogenous substances, the optimal membrane tension intervals of cellular uptake are different. According to the method, by optimizing the mechanical microenvironment where the cells are located, a new strategy is provided for improving the uptake efficiency of the cells on exogenous substances.

The invention provides a fluorescent probe for detecting tension of a cell membrane and a preparation method and application thereof, the fluorescent probe has a structural formula as shown in formula I: # imgabs0 #, and the invention also provides a detection method for tension change of the cell membrane, and the detection method comprises the following steps: S1) co-incubating the fluorescent probe and cells; s2) providing stimulation influencing cell membrane tension change for the cells, and respectively detecting the fluorescence lifetime of the fluorescent probe before and after the stimulation by adopting an imaging system; and S3) based on the fluorescence lifetime data obtained in the step S2), calculating the relative variation of the cell membrane tension so as to determine the dynamic change trend of the cell membrane tension. The fluorescent probe disclosed by the invention is low in cost and good in biocompatibility, and can be used for carrying out long-time imaging observation on cells. Meanwhile, the probe has cell membrane targeting property, can be specifically positioned on a cell membrane, and can be used for microimaging of the cell membrane.

The present invention relates to the technical field of POF heat shrink film detection, and discloses a POF heat shrink film performance detection device, including a detection platform, on which are arranged several groups of detection units for tension detection, the detection units including a carrier plate arranged on the upper surface of the detection platform, a first driving motor arranged on the side of the carrier plate, and several moving plates in an equidistant circular array arranged on the upper surface of the carrier plate, the first driving motor can drive several moving plates to move toward or away from each other at the same time, one side of several moving plates is provided with a tensile tester for testing tension, and the upper ends of several moving plates are provided with clamping units on the opposite sides; the clamping unit includes an upper clamping plate arranged on the side of the upper end of the moving plate, and a lower clamping plate rotatably connected to one side of the moving plate is arranged below the upper clamping plate. In the present invention, by arranging moving plates that can move toward or away from each other at the same time, and performing tension detection on the POF heat shrink film in a horizontal direction, the accuracy of the tension test on the POF heat shrink film is improved.

The utility model discloses a membrane material tension adjusting device and relates to the technical field of membrane material processing auxiliary devices, the membrane material tension adjusting device comprises a base, two supporting frames, two U-shaped frames and an adjusting assembly used for adjusting membrane material tension, the supporting frames are installed on one side of the top of the base, the U-shaped frames are installed on the other side of the top of the base, and the adjusting assembly is used for adjusting membrane material tension. And the adjusting assembly comprises two mounting seats, the mounting seats are mounted on the two sides of the top of the base, the top of the supporting frame is rotationally connected with a first rotating roller, the tops of the mounting seats are rotationally connected with first connecting rods, and a rotating frame is rotationally connected between the two first connecting rods. The first motor is started to drive the threaded rod to rotate, so that the sliding block can slide in the base and drive the second connecting rod, the rotating frame and the first connecting rod to move, the tension of a membrane material can be finely adjusted according to production requirements, and the stretching uniformity of the membrane material in the manufacturing process is ensured.

The utility model discloses a building waterproof roll tension testing device which comprises a workbench and a supporting plate, the workbench is fixedly connected with the supporting plate, first supporting columns are fixedly connected to the two sides of the supporting plate, a plurality of second supporting columns are fixedly connected to the side walls of the two first supporting columns, and the second supporting columns are fixedly connected to the side walls of the second supporting columns. The ends, away from the supporting plate, of the second supporting columns are fixedly connected with first supporting frames, the two ends of each first supporting frame are in threaded connection with screws, and the screws are in threaded connection with second supporting frames. By arranging a lead screw, a nut and other components, a motor is started to drive the lead screw to rotate, the lead screw is in threaded connection with the nut to drive the nut to move forwards, meanwhile, the nut drives a first supporting rod and a second supporting rod to move forwards, and the second supporting rod drives a pressing rod and a coiled material to move forwards; and the tension sensor can be used for carrying out tension test on the coiled material with uniform stress.

This invention relates to the field of large-scale adipose-derived stem cell culture technology, and discloses a culture medium and method for promoting the efficient expansion of adipose-derived stem cells. The method includes: seeding adipose-derived stem cells in a serum-free basal culture medium and maintaining a normoxic environment; adding an expansion additive composed of a Rho-associated kinase inhibitor and a redox buffer component; during the window period when the ambient oxygen partial pressure decreases from normoxic to hypoxic, using the Rho-associated kinase inhibitor to relieve cytoskeleton tension to induce a physically relaxed cell membrane; and assisting the redox buffer component in constructing a reducing environment on the cell membrane surface in situ. This invention utilizes the dynamic synergy of membrane tension regulation and oxygen stress shielding to neutralize transient damage caused by sudden changes in ambient oxygen partial pressure, avoid transmembrane receptor conformational inactivation, inhibit premature cell aging at the mechanistic level, and ensure long-term stable expansion of adipose-derived stem cells without the need for heterologous protein protection.

In accordance with at least selected embodiments, aspects or objects, there are disclosed or provided new or improved pins adapted for use with high or higher COF polymer membranes or separator membranes (also known as sheets or films), polymer tension measuring, and / or related methods of use, of cell or battery manufacture, and / or the like. In certain embodiments, the new or improved pins are especially well suited for use with dry process polyolefin microporous membranes, separator membranes, or separators. In certain selected embodiments, the new or improved pins are especially well suited for use with dry process polyolefin microporous membranes, separator membranes, or separators in Z-fold or S-fold machines for the production of lithium ion pouch cells, lithium polymer pouch cells, lithium prismatic cells, and / or the like.

The invention discloses a membrane tension response type composite molecular sensor and a preparation method and application thereof, the membrane tension response type composite molecular sensor comprises a DNA tetrahedral framework formed by a plurality of single-stranded DNAs through complementary base pairing, and the single-stranded DNAs comprise single-stranded DNAs modified with vibration luminescent molecules, single-stranded DNAs modified with cholesterol molecules and unmodified single-stranded DNAs; the vibration luminescent molecule is loaded on the end point of one single-stranded DNA through covalent modification, and the cholesterol molecule is loaded on the end point of the other single-stranded DNA through covalent modification; the vibration light-emitting molecules are excited by single laser, switching between bending conformation and torsional conformation occurs, and then cell membrane tension is responded through emission wavelength intensity change. The membrane tension response type composite molecular sensor has the advantages of being controllable in size, high in brightness, high in cell membrane targeting performance and the like, fluorescence proportion imaging of cell membrane tension is achieved, and the huge potential of the membrane tension response type composite molecular sensor in research and application of the life process of stem cells is revealed.

A sound system having a sound-emitting body (1) comprising a fillable, viscoelastic hollow membrane (2). To achieve an improvement in the sound quality while at the same time keeping production costs low, it is proposed that the membrane tension of the viscoelastic hollow membrane (2) can be adjusted in dependence on the sound emission behaviour due to the filling pressure such that the overpressure in the hollow membrane (2) is preferably between 0.01 and 0.5 bar; and the sound system having a structure-borne sound transducer (4) which is vibrationally connected to the sound-emitting body (1).

The utility model discloses an edge banding machine continuous membrane tension keeping device relates to edge banding machine component technical field, include: bottom plate, the top of bottom plate is installed with first bearing seat, the inboard of first bearing seat is installed with first support shaft, and the outside of first support shaft is installed with first guide roller. The utility model discloses through the installation of first guide roller, and first bearing seat supports inboard first support shaft, and first support shaft supports outside first guide roller, and the film passes the below of first guide roller, and second bearing seat supports inboard second support shaft, and second support shaft supports outside second guide roller, and servo motor operation drives output end screw rod rotation, and screw rod rotation drives the outside inner thread plate up and down movement through thread, and inner thread plate drives lift plate up and down movement, and inner thread plate drives lift plate movement, and lift plate and guide plate up and down movement, guarantee lift plate linear up and down movement, and lift plate drives bottom second guide roller to go up and down, and the user is convenient to adjust film tension.

An apparatus and method for stretch wrapping of a palletized load uses film tension feedback derived from a film tension control load cell to control film dispensation. The load cell measures film tension and the film payout rates is determined by the film tension. Film tension values are used to determine when an out of bounds condition occurs, namely, when a film break has occurred, or when a possible film break is about to occur or when the film has been cut at the end of a wrapping cycle. To prevent film free end entanglement caused by a break, clamps engage the film so the film tail is controlled, eliminating the risk of recoil. The broken film tail may then be quickly and reliably reattached to the rotating load in a desired position.

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 present invention provides an imprinting method and device. First, an unstrengthened wafer is cut according to a preset shape to obtain a plurality of sub-wafers, then the sub-wafers are subjected to high-intensity strengthening treatment, and finally, an imprinting resist is applied onto the strengthened sub-wafers and imprinted to form micro-nano structures. In this way, the cutting and strengthening processes are performed in advance, eliminating the need for cutting and strengthening after the imprinted structures are formed, thus effectively preventing damage to the imprinted structures caused by subsequent cutting and strengthening. In addition, the imprinting device provided in the present invention is employed during imprinting. Before imprinting, a soft film tension adjusting assembly is located at a first height, so that the tension of a flexible soft film satisfies the requirement for tensioning the flexible soft film; and during imprinting, the soft film tension adjusting assembly is located at a second height, so that the tension of the flexible soft film is kept at zero. The technical solution provided in the present application can improve an imprinting effect.

The utility model relates to the technical field of proton exchange membrane processing, and discloses a coating device for proton exchange membrane processing, which comprises a support, a raw material roller and a wind-up roller are arranged in the support, films are arranged on the outer walls of the raw material roller and the wind-up roller, and a coating assembly is arranged in the support. And the coating assembly comprises a frame, a first limiting groove is formed in the frame, a first motor is fixedly connected to the interior of a connecting block arranged in the frame, a coating roller is fixedly connected to the output end of the first motor, the outer wall of the coating roller is attached to the outer wall of the film, and a tension control assembly is arranged in the frame. According to the coating device, the threaded rod drives the outer taper sleeve to slide in the rotating shaft, and the outer taper sleeve drives the clamping plates to open through the inner taper sleeve to clamp and fix the raw material roller and the winding roller, so that the effects of adapting to the tension of a thin film and coating are achieved, the problem that a coating assembly and tension control are independently arranged is solved, and the size of the coating device is increased; and the practicability of the coating device is improved.

The invention relates to the technical field of biological nanotechnologies, and provides a preparation and application method of a membrane tension response type molecular sensor, the membrane tension response type molecular sensor comprises a nucleic acid frame structure and vibration-induced emission molecules, and the vibration-induced emission molecules are linked to the nucleic acid frame structure; the nucleic acid frame structure is hydrophilic, and the vibration-induced emission molecules are hydrophobic. The method has the advantages of high cell membrane targeting property, mechanical sensitivity and the like, and a new tool is provided for cell membrane tension detection.

This invention provides a method for evaluating stem cell trilineage differentiation based on single-cell membrane tension measurement, comprising: measuring the membrane tension of multiple single cells in a stem cell sample to be tested, and calculating the mean membrane tension; setting a membrane tension threshold for stem cell trilineage differentiation, comparing the mean membrane tension with the threshold, and evaluating the differentiation process and efficiency of the stem cell sample to be tested. This invention also provides the application of the above evaluation method in the quality control of clinical-grade stem cells, the evaluation of stem cell differentiation induction effects, or the screening of stem cell virulence before transplantation. This invention utilizes optical tweezers technology to construct a single-cell mechanical testing platform, enabling non-destructive quantitative measurement of single-cell membrane tension. Cells can remain intact and viable after testing and can be reused. By comparing the membrane tension data of the sample to be tested with the threshold, a systematic evaluation of stem cell differentiation process and efficiency can be completed, which can be widely applied in the fields of stem cell quality control and regenerative medicine clinical translation.

A curved grid double-layer ETFE air-cushion membrane structure system based on intelligent monitoring and its construction method are disclosed. The system includes a radial drainage ditch structure, a circumferential drainage ditch structure, an ETFE membrane structure, an inflation system, and a monitoring and control system. The radial and circumferential drainage ditch structures are arranged in a grid pattern and interconnected to form a drainage network; ribs, membrane tension plates, and horizontal supports are provided within the drainage ditches. The ETFE membrane structure comprises multiple membrane structure units, which are fixedly connected to the membrane tension plates via membrane clamps. The inflation system includes a main inflation pipe and inflation branch pipes, with a solenoid valve and inflation hose installed on the main pipe. The monitoring and control system includes sensors, a controller, and an alarm device. The sensors are electrically connected to the controller, and the controller automatically adjusts the air pressure and controls the alarm based on the collected data. This invention achieves integrated membrane structure construction and air pressure control, concealed drainage and air supply pipelines, and high levels of system safety, durability, and intelligence.

The utility model belongs to the technical field of PVC (polyvinyl chloride) film calendering, and particularly relates to a calender traction mechanism which comprises a base, two groups of guide plates are symmetrically mounted on the base, moving grooves are formed in the guide plates, moving blocks are assembled in the moving grooves, lifting blocks are mounted on the moving blocks, indicator lights are mounted on the lifting blocks, and the indicator lights are arranged on the guide plates. A sliding groove is formed in the lifting block, sliding blocks are assembled in the sliding groove, adjusting rollers are rotationally installed on the two sets of sliding blocks, first electrode plates are installed on the bottom sides of the sliding blocks, and second electrode plates are installed on the inner wall of the sliding groove. And then the PVC film is continuously pressed downwards under the action of the gravity of the PVC film, so that the PVC film is in a tensioning state, and when the PVC film is in the tensioning state, the adjusting roller stops moving downwards, so that the tensioning degree of the PVC film is adjusted, and the convenience of adjusting the tensioning degree of the PVC film is improved.