19 results about "Membrane tension" patented technology

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 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 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.

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.

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.

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.

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.

The invention belongs to the technical field of PEM (proton exchange membrane) water electrolysis hydrogen production, and particularly relates to a PEM water electrolysis hydrogen production membrane electrode coating method. The method comprises the following steps: step 1, dynamically pretreating coating slurry; 2, stable tension conveying of the proton exchange membrane; 3, double-sided synchronous slit coating is carried out; step 4, carrying out first OCT online detection in the coating process; 5, three-stage gradient drying and curing; step 6, after drying, carrying out OCT real-time detection and closed-loop adjustment for the second time; and step 7, winding a coated finished product. The problems of low single-side dispersion efficiency, uneven thickness, defect detection lag, transfer wrinkles and the like of a traditional coating process are solved.

The utility model relates to the technical field of vapor barrier film tension control equipment, in particular to an adjustable vapor barrier film tension control device. According to the technical scheme, the adjustable vapor barrier film tension control device comprises a control device body, a second motor, a clamping rod, a mounting support, a damping telescopic rod, a pressure reduction spring, a supporting support and a pressing shaft, mounting assemblies are arranged on the two sides of the control device body, and second mounting grooves are formed in the inner sides of the mounting assemblies; compared with a traditional vapor-proof film tension control device, when the tension of the vapor-proof film needs to be adjusted according to site conditions, the adjusting support needs to be disassembled and assembled frequently, inconvenience is caused, the vapor-proof film tension control device can adjust the tension of the vapor-proof film in real time by arranging the automatic tension adjusting structure and the tension absorbing structure, and the tension of the vapor-proof film can be adjusted in real time. Meanwhile, deformation and wrinkling of the vapor barrier film due to rebound elasticity of tension adjustment are prevented, and the tension control efficiency of the vapor barrier film is effectively improved.