171 results about "Flexible fiber" patented technology

The invention discloses a TBM cutterhead blockage early warning system based on distributed temperature measurement, and belongs to the technical field of mechanical engineering, a multi-modal data fusion unit comprises an integrated multi-source sensor module and a data fusion analysis module, the integrated multi-source sensor module adopts a bionic cobweb topological structure to arrange a flexible fiber grating sensor, and the data fusion analysis module adopts a data fusion analysis module to analyze the flexible fiber grating sensor. The data fusion analysis module carries out fusion processing on multi-source data through a machine learning algorithm and constructs a multi-modal data input layer, and the data fusion analysis module also designs dynamic weight distribution through a process scheduling algorithm. A bionic cobweb topological structure is adopted to arrange the flexible fiber grating sensor, the strain self-compensation characteristic of the flexible fiber grating sensor is utilized to adapt to cutterhead deformation, a machine learning algorithm is utilized to fuse multi-source data, a multi-modal data input layer is constructed, dynamic weight distribution is achieved through a process scheduling algorithm, and the cutterhead deformation detection accuracy is improved. The problem of data islands of a traditional single sensor system is solved, and the monitoring precision and adaptability are improved.

A fiber-optic light guide is provided. The light guide includes plurality of optical fibers and an enveloping material. The plurality of optical fibers define a flexible fiber bundle. The flexible fiber bundle has a first diameter and a length along a longitudinal axis. The enveloping material encloses the plurality of optical fibers at one end of the flexible fiber bundle and over at least a part of the length to define a rigid portion. The plurality of optical fibers in the rigid portion are fused with one another. The flexible fiber bundle has a modified or formed cross-sectional geometry in a region of the enveloping material.

The invention discloses an organoid culture and flexible fiber sensor integrated platform and a construction method and application thereof. The integrated platform comprises a flexible template, a flexible frame body and a flexible fiber sensor, a culture chamber is formed by the flexible template and the flexible frame body; the flexible fiber sensors are arranged close to the side wall of the culture chamber, and the flexible fiber sensors comprise two types, one type is obtained through self-contraction, and the other type is obtained through twisting after self-contraction. The constructed integrated platform can reproduce the structure of the heart and the mechanical microenvironment of the heart in vitro, meanwhile, simultaneous monitoring of organoid mechanical-chemical signals is achieved in the myocardial beating process, and the limitation that existing organoid mechanical-chemical signals are difficult to synchronize and obtain in real time is broken through.

The invention belongs to the field of synthesis of luminescent materials, and relates to a preparation method and application of a zero-dimensional manganese-based hybrid halide nanofiber membrane with reversible photoluminescence and radiation luminescence conversion. The synthetic route is as follows: preparing a precursor from 4-dimethylaminopyridine (DMAP) and hydrochloric acid, then synthesizing zero-dimensional organic-inorganic metal chloride with manganese chloride hydrate (MnCl2. 4H2O) and anhydrous manganese chloride (MnCl2), further mixing the zero-dimensional organic-inorganic metal chloride with polyvinylidene fluoride (PVDF), and performing electrostatic spinning to obtain a nanofiber film; compared with the prior art, the stimuli-responsive reversible PL switch flexible fiber membrane prepared by adopting an electrostatic spinning technology has excellent stability and PL switch performance, and can show efficient PL and RL switching under external stimuli. Meanwhile, the flexible nanofiber film produced by the method has the advantages of one-step synthesis, quick response, repeatability, good portability and low cost, so that the flexible nanofiber film becomes a new application of molecular-level dynamic photonic devices for data storage, information security, optical logic gates, flexible X-ray imaging and the like.

The invention discloses a flexible nylon yarn composite fiber membrane with a heat and humidity management function and a preparation method of the flexible nylon yarn composite fiber membrane, and belongs to the technical field of radiation cooling heat and humidity management materials. According to the preparation method, a silk fibroin (SF) solution and a nylon 66 (PA66) solution are mixed according to a certain proportion to prepare a precursor solution, and the PA66-SF composite fiber membrane is prepared by adopting an electrostatic spinning process. By introducing the PA66, the defect that the reflectivity of an ultraviolet region of an SF fiber membrane is low due to the inherent absorption characteristic of protein is effectively improved, the mechanical property of the SF fiber membrane can be remarkably improved, and the fiber membrane has excellent dry flexibility and wet stability. The preparation method provided by the invention is simple and convenient to operate, and the prepared flexible fiber membrane material has a temperature-humidity collaborative management function and is wide in application prospect.

The invention belongs to the technical field of new energy materials and lithium ion batteries, and relates to a PVDF-HFP / LLZO composite solid electrolyte membrane, a preparation method and application of the PVDF-HFP / LLZO composite solid electrolyte membrane in a flexible electronic device. The composite solid electrolyte membrane disclosed by the invention comprises a matrix formed by PVDF-HFP (Polyvinylidene Fluoride-Hexafluoropropylene) nanofibers and LLZO (Likelike Likelike Zinc Oxide) particles, and a three-dimensional network structure formed by crosslinking DVB (Divinylbenzene) in the matrix, wherein SDS (Sodium Dodecyl Sulfate) is adsorbed on the surfaces of the LLZO particles. A flexible fiber scaffold structure is constructed through an electrostatic spinning process, and sodium dodecyl sulfate (SDS) is introduced into a precursor to carry out interface regulation and control treatment on the surface of an inorganic filler LLZO, so that the dispersity and wettability of the inorganic filler LLZO in a polymer matrix are improved; meanwhile, divinylbenzene (DVB) is introduced as a cross-linking monomer, and in-situ construction of a three-dimensional network structure is realized under a heat treatment condition, so that the mechanical stability and ionic conductivity of the membrane material are remarkably improved.

The invention provides an integrated flexible optical fiber sensing device and an in-vivo sensing method thereof, and belongs to the technical field of crossing of intelligent sensing and additive manufacturing. Comprising two fixing mechanisms which are arranged in parallel and at an interval and used for being fixed to the surface of a detected structure, and first caulking grooves are correspondingly formed in the end faces of the two fixing mechanisms; the elastic base body is arranged in the area between the two fixing mechanisms and arranged in a bent shape, a second caulking groove is formed in the end face of the elastic base body, and the second caulking groove is further communicated with the first caulking grooves in the two fixing mechanisms; the metalized optical fiber is sequentially embedded in the first embedding groove and the second embedding groove, and FBG fiber gratings are arranged at the two ends, located in the first embedding groove, of the metalized optical fiber; the metalized optical fiber, the two fixing mechanisms and the elastic base body are integrally formed. Metal 3D printing processing is adopted to improve the manufacturing efficiency, optical fiber metallization and an optical fiber-metal integrated forming process are combined, rigid connection of the optical fiber and the metal matrix is achieved, and heat resistance and operability are improved.

The present invention discloses a fiber-type flexible strain sensor with interlaced soft and hard segments and a preparation method thereof. The invention adopts a coaxial wet spinning process to prepare thermoplastic polyurethane-coated polyvinylidene fluoride (TPU@PVDF) core-sheath structure fiber, and utilizes ultrasonic impregnation to load multi-walled carbon nanotubes (MWCNTs) on the fiber surface, or blends ionic liquids (ILs) in the TPU matrix to construct a conductive path. Subsequently, a core-sheath structure fiber with "soft-hard" segments is formed by pre-stretching. Finally, conductive silver paste is coated on both ends of the fiber as electrodes to obtain a flexible fiber-type strain sensor. Through the "soft-hard" structural design, the present invention makes the flexible fiber-type strain sensor have a greatly improved sensitivity while maintaining a wide strain response range, and its preparation method is simple and efficient.

The invention discloses a preparation method and application of a graphite / PDMS-based flexible spinning fiber sensor. Comprising the following steps: mixing graphite flakes and a PDMS liquid prepolymer, and carrying out ultrasonic stirring; adding a curing agent, continuing ultrasonic stirring uniformly, putting into a vacuum drying oven, standing and defoaming to obtain a spinning solution, putting into an injector, injecting the spinning solution into a coagulating bath through an injection pump to obtain a flexible spinning fiber, immersing into xylene, performing swelling treatment, and then drying; silver wire electrodes are pasted to the two ends of the flexible spinning fiber through conductive adhesive, the silver wire electrodes are wrapped with thermoplastic pipes, and the flexible fiber sensor is obtained; and carrying out cyclic stretching on the flexible fiber sensor by adopting an electronic fatigue testing machine, collecting the resistance in the cyclic stretching process, and stopping cyclic stretching after the resistance reaches a stable state, so as to obtain the graphite / PDMS-based flexible spinning fiber sensor. The sensor is large in sensing strain range and high in sensitivity.

The invention discloses a traditional Chinese medicine tea drink formula helpful for slimming and softening waist, and relates to the technical field of traditional Chinese medicine tea drinks. Comprising 35-70 parts of a softening and firming compound and 3-6 parts of a seasoning raw material, the flexible fiber firming compound is prepared from a basic shaping group, a tendon-softening and collateral-activating group and an active plant extraction group through a three-order synergistic conversion process, wherein the basic shaping group accounts for 60%-70% of the total weight of the compound, the tendon-softening and collateral-activating group accounts for 20%-25% of the total weight of the compound, and the active plant extraction group accounts for 10%-15% of the total weight of the compound; the three-stage synergistic conversion process is specifically a process for cooperatively treating the raw materials through three stages of gradient extraction, enzymolysis and fermentation in sequence. According to the invention, the fiber-softening and skin-firming compound element is arranged, so that multiple effects of reducing fat, shaping, softening tendons, activating collaterals, firming and nourishing skin and the like can be considered, and the problems that in the prior art, the formula raw material combination is single, only one-dimensional conditioning is focused, and the applicable crowd is limited are solved; meanwhile, collaborative conditioning on complex problems such as waist fat accumulation, fascia stiffness and unsmooth qi and blood can be achieved, and the overall improvement effect is improved.

The present application belongs to the field of thermal insulation materials, and particularly relates to a flexible fiber paper and a preparation method thereof and a fire-resistant cable wrapping material. The flexible fiber paper comprises first fibers which are porous silica fibers, and the diameter of the first fibers is 300 nm to 2000 nm, and the porosity of the flexible fiber paper is 85% to 99.6%. The flexible fiber paper has high flexibility, and no fold marks are generated after 500 times of 180-degree bending, and the flexible fiber paper has high thermal insulation performance.

The application provides a ceramic-based aerogel and a preparation method, and belongs to the technical field of aerogel materials. The ceramic-based aerogel takes hollow structure, alumina flexible fiber with good flexibility and porous powder as main raw materials, and can generate fiber gel in situ under the action of a catalyst, so that the flexibility of the ceramic-based aerogel is improved, the thermal conductivity is greatly reduced, the ceramic-based aerogel has good heat absorption effect and excellent fireproof and heat insulation performance, and has good heat insulation effect in low-temperature and high-temperature fields. The synergistic effect of the alumina flexible fiber and the silicon dioxide aqueous solution can enhance the mechanical strength and flexibility of the ceramic-based aerogel, and improve the mechanical ability. The use of a surface treatment agent can enable the ceramic-based aerogel to have good waterproof ability. The synergistic effect of the alumina flexible fiber with low thermal conductivity and the light shielding solvent can enable the ceramic-based aerogel to have better heat absorption effect and excellent fireproof and heat insulation performance. The preparation method has simple process and low cost, and is suitable for large-scale production.

The invention provides a preparation method and application of a fluorescence sensor for detecting metal ions based on a metal organic framework packaged nano-cluster. The preparation method comprises the following steps: by taking flexible fibers as a base material, firstly coating the surface of the flexible fibers with a metal organic framework, and then soaking the flexible fibers coated with the metal organic framework in a polyethyleneimine-terminated nano-cluster solution, thereby obtaining the metal ion detection fluorescent sensor based on the nano-cluster packaged by the metal organic framework. The polyethyleneimine is utilized to improve the stability and the fluorescence property of the nano-cluster obtained by reduction, so that the fluorescence sensor can maintain the fluorescence property under different pH values and temperature conditions. The prepared fluorescence sensor can rapidly respond to existence of target ions, fluorescence signals change obviously and rapidly, toxicity is small, reproducibility is good, the lower detection limit is low, fluorescence quenching is conducted on metal ions, and sensitivity is high.

The invention discloses a production technology of a jute environment-friendly coir mat with a three-dimensional structure, and relates to the technical field of jute coir mat production.The production technology comprises the following steps that S1, raw material pretreatment is conducted, specifically, raw jute is sequentially subjected to three-stage degumming including anionic surfactant solution soaking, pectinase treatment, lignin peroxidase treatment and caustic soda boiling-off, performing countercurrent cleaning and vacuum drying to obtain flexible fibers; s2, mixing fibrils: mixing the pretreated jute fibers with palm fibers and ramie fibers in proportion to form a mixed fiber raw material; s3, opening and carding: performing loosening treatment on the mixed fibers by a bidirectional opener, and preparing flocculent fibers by a carding machine; the flocculent fiber filaments are sprayed to a lapping machine through an exhaust fan, the lapping machine reciprocates at the constant speed of 1.5-2.5 m / s in the direction perpendicular to the spraying direction, the fiber flexibility can be improved, a three-dimensional supporting structure can be constructed, and a formaldehyde adding source can be eliminated.

Methods include functionalizing, into a compressible pressure varying electrical conductance device, a portion of a compressible nonwoven material (CNM) cushion. A process includes forming within a three-dimensional (3D) target region of the CNM cushion a columnar distribution of non-solidified conductive polymer, and converting the columnar distribution of non-solidified conductive polymer into a columnar compressible pressure varying electrical conductance structure. The columnar distribution of non-solidified conductive polymer extends along a column axis. Forming the columnar distribution includes injecting into at least a portion of the 3D target region a liquid carrying conductive polymer in suspension. The columnar compressible pressure varying electrical conductance structure includes mutually separated masses of solidified conductive polymer respectively supported by mutually separated flexible fibers of the compressible nonwoven material. Optionally, forming the columnar distribution of non-solidified conductive polymer includes a first injection followed by partial drying, and a second injection.

The invention discloses a three-dimensional network structure magnetic fiber carrier reinforced micro-plastic magnetic separation removal method, which is characterized in that Fe3O4 nanoparticles are selectively precipitated among sepiolite fiber bundle layers by controlling a coprecipitation process, and a wedging effect is generated to realize controllable stripping of fiber bundles, so that a three-dimensional network structure magnetic carrier is formed; a mechanical interlocking structure is formed on the surface of the flexible fiber and the micro-plastic, and the pH of a water body is self-adaptively regulated and controlled through the amphoteric ionization characteristic of silicon hydroxyl; enabling the magnetic aggregate suspension to sequentially pass through a multi-stage gradient magnetic field consisting of a pre-magnetization field, a main separation field and a fine scavenging field, and controlling the flow rate to enable the aggregate to form a stable filter cake layer on the surface of a magnetism gathering medium, so as to realize efficient separation of the micro-plastic; and the magnetic gathering medium capturing the aggregate is subjected to heat treatment, so that the micro-plastic is thermally decomposed, the magnetic carrier is directly recycled, the magnetic performance is improved, and regeneration reinforcement is realized. The micro-plastic removal rate reaches 99% or above, the performance is stable after multiple cycles, and the method is suitable for treating various micro-plastic-containing water bodies.

A device for producing preforms for aircraft structural components, wherein the device has a supply unit, which is designed to supply a layered structure having at least one material ply of a thermally activatable, flexible fiber composite material, together with a protective film arranged in each case on at least one outer side of the layered structure, wherein the device has at least one shaping unit, which is arranged downstream of the supply unit in a conveying direction and is designed to shape the layered structure supplied, wherein in that the layered structure, together with the respective protective film, can be fed to the shaping unit or to one of the shaping units with a cross-sectional profile with which the protective film or at least one of the protective films extends along a straight line.

The invention relates to the field of electromagnetic shielding, and discloses a preparation method of flexible light-weight flame-retardant electromagnetic shielding cloth which comprises a base layer, electromagnetic shielding cloth and a flame-retardant layer. The base layer is made of a macromolecule flexible fiber material to provide flexibility and mechanical strength. According to the electromagnetic shielding cloth, a chemical plating and electroplating method is adopted, metal ions are reduced into atoms or molecules, the atoms or the molecules are deposited to form a metal film on the surface of the fabric, and the obtained electromagnetic radiation composite fabric not only has an excellent electromagnetic shielding effect, but also has good conductivity. And the flame-retardant layer is composed of a flame retardant and resin, so that the flame-retardant property is improved. The preparation method comprises the steps of preparation of the base layer, preparation of the electromagnetic shielding cloth and composite preparation of the flame-retardant layer. The invention relates to a preparation method of flexible light-weight flame-retardant electromagnetic shielding cloth, which comprises the following steps: designing and developing a functional integrated metal coating-based composite fabric through a composite hierarchical structure, exploring a reflection and absorption mechanism of electromagnetic waves on the functional composite fabric, and optimizing micro-structure parameters and designing flame retardance to obtain the flexible light-weight flame-retardant electromagnetic shielding cloth. And the electromagnetic radiation shielding composite fabric with full-segmentation electromagnetic shielding property and flame retardance is developed.

The application discloses a degradable fiber electrode fabric for three-dimensional electrogastrography monitoring and a preparation method thereof. The preparation method comprises the following steps: subjecting degradable polyglycolide fibers to plasma treatment, and evaporating a gold layer on the polyglycolide fibers; in-situ polymerizing a polypyrrole conversion layer on the surface of the gold layer; in-situ reducing gold nanoparticles on the surface of the polypyrrole conversion layer; coating a poly(1,8-octyleneglycol citrate) solution on the surface of the gold nanoparticle layer to form an insulation layer, and obtaining a degradable flexible fiber electrode; using a knitting technology to synchronously knit the flexible fiber electrode and the polyglycolide fibers to form a three-dimensional flexible fabric structure, removing the insulation layer on a target area of the flexible fabric structure to expose a conductive layer, and obtaining the degradable fiber electrode fabric. The fiber electrode fabric prepared by the application can realize full-curve fitting of a gastric serosal surface, does not need external fixation, and can be used for long-term, stable and real-time multi-dimensional gastric electrophysiological signal acquisition.

This invention discloses a self-adhesive hydrogel photoelectrode, array, device, application, and evaluation method. The self-adhesive hydrogel photoelectrode comprises a self-adhesive hydrogel optical fiber and at least one flexible fiber electrode. The optical fiber has a core-skin structure; the skin is composed of adhesive polymers such as polyvinyl alcohol, polyacrylic acid, and polydopamine, while the core is a transparent hydrogel. The flexible fiber electrode comprises conductive materials such as graphene oxide, carbon nanotubes, and polypyrrole. The flexible fiber electrode is directly integrated onto the surface of the optical fiber through the adhesion of the fiber skin, forming a heterogeneous structural unit integrating optical transmission and electrical conduction. This technology relies on a dynamic interface bonding mechanism to achieve stable and reconfigurable heterogeneous integration in a humid environment. The device simultaneously possesses low optical loss, high conductivity, strong tissue adhesion, and excellent biocompatibility, making it suitable for implantable neural modulation and signal acquisition, in vitro testing, and interface reliability assessment.

The application discloses a kind of corrosion-resistant waterproof coating and preparation method thereof, it is related to protective coating technical field.The impact force generated by spraying process in the application, so that ceramic flexible fiber is embedded in the small pore or uneven place of substrate surface, and three-dimensional network structure is formed on the surface, so as to realize the corrosion resistance and waterproofness of coating, simultaneously, by acting force, promote titanium sol and metal substrate combination, reaction, and then passivate metal surface, further enhance corrosion resistance and waterproofness, then by high-temperature treatment, form nanoscale rough surface on coating, so that substrate realizes hydrophobicity, so as to enhance the corrosion resistance, waterproof effect of coating, finally, spray epoxy resin, form ultra-thin encapsulation coating, so that rough hydrophobic structure is not influenced, and then improve corrosion resistance and waterproofness.

A preparation method for a separator for lithium thionyl chloride batteries. The preparation method comprises the following steps: (1) adding inorganic fibers and flexible fibers to water, and mixing and dispersing same to obtain a mixed fiber suspension; (2) subjecting the mixed suspension to slurry spreading, and forming same into a wet paper sheet; and (3) applying an adhesive to the surface of the wet paper sheet, and drying same to obtain a separator for lithium thionyl chloride batteries. Inorganic fibers are used as the main material for the battery separator, thereby ensuring the safety performance of the battery separator in a high-temperature environment. Moreover, the battery separator can absorb excess electrolyte to participate in reactions at positive and negative electrodes of a battery, thereby ensuring that the battery has good charging and discharging performance. Furthermore, flexible fibers, an adhesive and inorganic fibers are combined to form the battery separator, wherein the flexible fibers and the adhesive can work synergistically, improving both the strength and ductility of the battery separator, thereby significantly enhancing the assembly capability of the battery separator.

Flexible functionalized packing materials, modular constructed wetlands, and their methods for purifying typical rural domestic sewage belong to the field of rural domestic sewage treatment technology. The flexible functionalized packing materials are obtained by wrapping functionalized packing materials with a metal-woven flexible fiber wrapping material. The functionalized packing materials include solid packing materials and embedded microorganisms. The solid packing materials (volcanic rock with a porosity between 40% and 50%) embed microorganisms in their porous structure. The flexible functionalized packing materials are placed on a rigid support structure to form an integral flexible functionalized packing material module. The flexible functionalized packing material module includes three types of functional wetland modules: aerobic respiration enhanced ammonia nitrogen oxidation wetland module, facultative denitrification wetland module, and enhanced phosphorus removal wetland module. The module consists of three parts: internally embedded functionalized microbial packing materials, a flexible metal-woven flexible fiber wrapping material, and a rigid supporting carbon steel skeleton. In this invention, the functionalized packing materials embed functional microorganisms on the basis of the original packing materials. By fixing the microorganisms, the number of microorganisms in the packing materials is increased, improving the efficiency of pollutant removal. Using functional bacteria to replace traditional miscellaneous bacteria allows for precise control of the packing material's function, and the arrangement can be adjusted according to the quality of the domestic sewage.

The invention discloses a high-density flexible optical fiber ribbon micro-cluster cable containing a hollow-core optical fiber and a multi-core optical fiber and a preparation method of the high-density flexible optical fiber ribbon micro-cluster cable, and belongs to the technical field of optical cables. The high-density flexible optical fiber ribbon micro-cluster cable comprises an optical fiber unit and an outer sheath arranged on the periphery of the optical fiber unit, and the outer sheath is divided into a first sheath part and a second sheath part in the radial direction; reinforcing pieces are embedded in the first sheath parts, the first sheath parts are arranged in pairs and arranged on the two sides of the optical fiber unit respectively, the two first sheath parts are connected through the second sheath parts, and the shrinkage rate of sheath materials in the first sheath parts is larger than that of sheath materials in the second sheath parts. According to the invention, by controlling the shrinkage rate of the circumferential sheath material of the outer sheath, the shrinkage rates of the sheath materials at different parts are different, so that the internal optical fiber unit is prevented from being extruded, and the probability of fiber breakage in the production of the micro-cluster cable is reduced. According to the invention, a conventional extrusion mode is adopted for molding, the problem of optical fiber breakage caused by a vacuum sizing process adopted by a conventional micro-cluster cable is avoided, the molding process of the micro-cluster cable is simplified, and the production efficiency of the optical cable is improved.

The application discloses a wound dressing and a preparation method and application thereof; the wound dressing comprises polymer flexible fibers and cobalt-iron layered double hydroxide nanosheets dispersed in the polymer flexible fibers; the cobalt-iron layered double hydroxide nanosheets contain a cobalt vacancy structure in a crystal lattice. The wound dressing has a strong "electron capture effect" due to the cobalt vacancy. The wound dressing can physically capture electrons on a respiratory transmission chain of a pathogenic bacterial cell membrane, interferes with transmembrane proton transfer and ATP synthesis, directly kills the bacteria through "metabolic starvation", and further has a broad-spectrum physical bactericidal function independent of antibiotics. The wound dressing has excellent superoxide dismutase-like and catalase-like activities, can long-acting capture and remove active oxygen such as superoxide anions and hydrogen peroxide in an inflammatory microenvironment of a wound, promotes macrophages to polarize to a M2 phenotype for promoting repair, and has anti-inflammatory and pro-angiogenic functions.

The invention belongs to the technical field of flexible sensing fibers, and provides a preparation method of a wireless flexible sensing fiber based on a radio frequency mechanism, and a varicosity sock elasticity detection system and method. And in consideration of the promotion effect of the microstructure on the capacitive performance, TPU is selected as a material to prepare the dielectric layer with a porous structure by using a mixed liquid phase separation method, so that the performance of the sensor is improved. Meanwhile, in order to realize wireless data transmission, an inner electrode and an outer electrode of the sensing capacitor are led out and knotted and short-circuited together to form a spiral shape, so that the wireless flexible fiber sensor based on the LC resonance characteristic is formed. The wireless flexible fiber sensor prepared by the invention combines the advantages of a microstructure and wireless transmission, can ensure the stability of the capacitance performance and the sensor performance during varicosity detection, and ensures the accuracy of varicosity elasticity detection.

The present application relates to the field of oil and gas field development engineering, disclose a kind of intelligent optimization method for discrete element contact parameters of proppant particle and flexible fiber mixture, comprising: based on the principle of injection method angle of repose experiment, build micro funnel device, reduce the scale of experiment under the premise of keeping the original size of material, improve the efficiency of calculation;Adopt "ball column chain + joint" fiber model, coupling JKR adhesion model represents the interfacial adhesion between particles, establish high-precision discrete element simulation model;Through Plackett-Burman, steepest climbing experiment screening key influencing factors, for the problem that each factor and angle of repose is nonlinear mapping relationship, construct GA-BP model, combine GA algorithm optimization, preferred parameter combination, compare the results of discrete element simulation and laboratory test results, verify the accuracy of contact parameters.The present application solves the problem that the existing method is difficult to calibrate mixture, improves the precision and efficiency of parameter calibration, and is helpful to the research and development of hydraulic fracturing process.

The invention discloses a preparation method and application of a multi-electrode photoelectric flexible optical fiber, and belongs to the technical field of multifunctional flexible fiber preparation. Flexible material granules are fused to serve as a cladding, a conductive composite material prepared through a co-extrusion process serves as an electrode, a prefabricated body is assembled, and the multi-electrode photoelectric flexible optical fiber is obtained through hot stretching. The tensile elongation of the flexible optical fiber is up to 685%. By stretching the multi-electrode photoelectric flexible optical fiber, a resistance signal becomes larger, a light intensity signal becomes smaller, monitoring of the bending direction can be achieved through resistance changes of different electrodes, and the bending recovery process is reversible. The multi-electrode photoelectric flexible optical fiber sensor can simultaneously monitor stretching and bending directions in two dimensions of electric signals and optical signals.

The invention relates to the field of turners, and discloses a sludge resource reutilization compost workshop turner which comprises a rotating shaft arranged in the middle of a mounting seat and a maintenance assembly arranged on one side of the rotating shaft, and the maintenance assembly mainly comprises a wheel disc, a fixed friction plate, a movable friction plate, a hoop, a blade and a movable plate. According to the turning and throwing machine for the sludge resource reutilization composting workshop, the two friction plates form a grinding disc, flexible fibers are efficiently treated in a friction grinding mode, the grinding disc is arranged at the position, close to one side of the rotating shaft, of the interior of the mounting base, and the grinding disc is arranged at the position, close to one side of the rotating shaft, of the interior of the mounting base. The defect that traditional cutting is prone to being stuck is overcome. Meanwhile, the anti-winding function and the self-cleaning function are combined, and the brake safety function is achieved when the friction plate is closed; the blade and the movable plate automatically clean adhered materials through vibration, the saw-tooth cutting edge cuts off residual fibers, an anti-winding self-cleaning closed loop of crushing, shaking off and cutting off is formed, and manual intervention is reduced.

The invention discloses a flexible thermal control coating with high thermal insulation performance. The flexible thermal control coating comprises a flexible high polymer, a functional filler, a thermal insulation filler, flexible fibers, a film-forming agent, a dispersing agent and a curing agent. The invention also discloses a preparation method of the flexible thermal control coating, which comprises the following steps: adding the flexible high polymer, the functional filler, the film-forming agent and the dispersing agent into the organic solvent to obtain a uniform solution; carrying out surface modification on the flexible fibers; adding a heat-insulating filler and surface-modified flexible fibers into the uniform solution to obtain a coating; and adding a curing agent into the coating, and coating the surface of a base material with the coating to obtain the flexible thermal control coating. The heat insulation coating can be applied to a movable cabin door of a heaven and earth round-trip aircraft, in daily work of the aircraft, the coating can be used as a low-absorption and high-emission coating, the surface temperature of the aircraft is reduced, and when the movable cabin door of the aircraft is opened, the flexible heat insulation coating on the outer surface of the cabin door does not crack or fall off.