293 results about "Membrane structure" patented technology

The invention relates to the technical field of material nondestructive testing, and discloses a membrane structure welding seam defect detection method based on image recognition, which is used for solving the problems of low defect segmentation accuracy and incapability of effectively recognizing internal defects caused by continuous image gray change of lap welding seams of unequal-thickness flexible materials in a traditional method. The method comprises the following steps: firstly, collecting an original image of the lap weld of the unequal-thickness flexible material, carrying out gray conversion, analyzing thickness gradient distribution, adjusting a gray value, carrying out region segmentation to lock a weld range, extracting potential defect edge features to form a candidate region, and carrying out classified verification to confirm internal defects. Aiming at the problem of low defect segmentation accuracy caused by continuous change of image gray in the prior art, the method improves the defect identification precision through segmented mapping and boundary tracking logic, and is suitable for membrane structure engineering quality control.

The invention relates to the technical field of ETFE film testing, and discloses an ETFE film structure life prediction method and system based on machine learning, and the method comprises the steps: carrying out the standardization preprocessing of the cyclic load fatigue data of an ETFE film structure in a biaxial stress state, and obtaining a standard feature vector; performing membrane structure geometric weight distribution on the standard feature vector to obtain a weighted feature vector; performing multi-time scale damage feature extraction based on the weighted feature vector to obtain a fused damage feature; inputting the fused damage features into a fatigue damage evolution physical constraint embedder for constraint calculation to obtain physical constraint damage features; bayesian probability life prediction is carried out on the physical constraint damage features, and a fatigue life prediction value of the ETFE film structure is obtained.According to the method, key damage parameters of different deformation stages can be recognized in a self-adaptive mode, the characterization precision of the fatigue behavior of the film structure is remarkably improved, and the life prediction accuracy of the ETFE film structure is improved.

The invention provides a water-gas interface gas collecting device and a monitoring method, and the collecting device comprises a floating part which is constructed to be annular and floats on a liquid surface; the framework extends upwards from the floating part; the membrane structure is arranged on the framework and is suitable for enclosing a flux box with a top opening with the framework part and the floating part; the zero gas supply unit is suitable for supplying zero gas to a water-gas interface positioned in the flux box, so that to-be-detected gas from the water-gas interface moves upwards; and the collection unit is arranged at the upper part of the flux box and is suitable for collecting mixed gas containing zero gas and gas to be detected.

The invention relates to the technical field of architectural membrane testing, and provides architectural membrane structure tearing strength testing equipment which comprises a sample table, a width adjusting module, a clamping module, a length adjusting module, a controller and a winding roller, the controller and the winding roller are arranged at the two ends of the sample table respectively, and a sample is wound on the surface of the winding roller; a rectangular ruler frame in the width adjusting module is in threaded connection with a two-way screw, an air cylinder in the clamping module is fixedly arranged between a clamping piece and an L-shaped frame, the L-shaped frame movably sleeves the lower portion of the rectangular ruler frame, a one-way screw in the length adjusting module is arranged above a sample table, a movable frame is in threaded connection with the one-way screw, and a first cutter body is arranged below the movable frame. Transverse rods are fixedly arranged on the two sides of the movable frame and penetrate through the surface of the L-shaped frame, the two sets of clamping modules are symmetrically distributed on the two sides of the first cutter body, standardization and automation of the whole process of sample preparation, tearing testing and data collection of the building film tearing testing are achieved, and the building film tearing testing device has the advantages of being high in sample manufacturing efficiency and high in testing precision.

The present invention discloses a method for detecting cyclical gas injection within a double-membrane structure within an underground rock cavern gas storage cavity. The method comprises the following steps: 1. constructing the double-membrane structure on the surrounding rock mass; 2. detecting gas injection between the inner and outer membrane layers; and 3. injecting and detecting compressed air within the cavity. The present invention detects the cyclical gas injection and degassing within the double-membrane structure, minimizing damage to the double-membrane structure and thereby improving the durability and safety of the double-membrane sealing structure.

The invention discloses a high-storage-ratio folding method for a large conical film structure, and belongs to the technical field of space debris removal and satellite light shields. The problems that an existing plane deorbit sail is poor in attitude stability and low in deorbit efficiency are solved. Comprising the following steps: S1, drawing equidistant circumferential folding lines on a conical film structure, wherein the circumferential folding lines comprise a circumferential ridge line and a circumferential valley line; s2, circumferential folding is carried out, axial compression is carried out along the axis of the cone, and then circumferential contraction is carried out; and S3, folding from a cone to a cylinder. The three-dimensional conical film sail can be folded into the three-dimensional conical film sail which is high in posture stability, relatively high in unfolding reliability and capable of correcting the posture, and the folding efficiency is high.

The utility model relates to a membrane structure and a water purification device, and relates to the technical field of water purification treatment. The diaphragm structure comprises a diaphragm group and at least one separator, the diaphragm group comprises at least two layers of diaphragm bodies, the at least two layers of diaphragm bodies are sequentially stacked, and the front surfaces of the two adjacent layers of diaphragm bodies are oppositely arranged to form a water inlet runner; the membrane body is provided with a first side and a second side which are oppositely arranged in a first direction, the first side is provided with a raw water inlet communicated with the water inlet flow channel, and the second side is provided with a concentrated water outlet communicated with the water inlet flow channel; at least one separator is arranged in the water inlet flow channel, and the separator is configured to be capable of separating the water inlet flow channel so as to improve the flow speed of fluid in the water inlet flow channel. According to the technical scheme disclosed by the utility model, the membrane surface concentration polarization layer phenomenon can be weakened, the anti-pollution capability of the membrane structure is improved, and the service life of the membrane structure is prolonged.

The application provides a building membrane structure performance testing device and a safety evaluation method in a simulated corrosion environment, and relates to the technical field of building membrane structure performance testing devices. The building membrane structure performance testing device comprises a membrane material tensioning device, an artificial simulated corrosion device and a data acquisition system. The membrane material tensioning device is used for fixing a building membrane material to be tested and applying a tensioning force to the building membrane material during testing. The artificial simulated corrosion device comprises a control module, a booster water pump and an ultraviolet lamp. The control module controls the booster water pump and the ultraviolet lamp to simulate a corrosion aging environment of the building membrane material during testing. The data acquisition system comprises a laser displacement sensor. When the building membrane material with a mark point deforms in the simulated corrosion aging environment, the laser displacement sensor monitors the deformation of the mark point and forms testing data. The application can accurately control the tensioning force and direction of the membrane structure and carry out long-term corrosion after tensioning is completed. The application can accurately analyze and evaluate the mechanical properties of the safety performance of the membrane structure before and after corrosion.

The utility model relates to the field of detection reagent consumables, and provides a tear-resistant multilayer composite fiber membrane structure, which comprises a wear-resistant structure, the bottom surface of the wear-resistant structure is adhered with a tear-resistant structure, the tear-resistant structure comprises first fibers, second fibers and a second adhesive layer, the top ends of the first fibers are adhered to the bottom surface of the wear-resistant structure, and the top ends of the second fibers are adhered to the bottom surface of the wear-resistant structure. Second fiber yarns are arranged on one sides of the first fiber yarns, and second bonding layers are bonded to the bottom ends of the second fiber yarns. Through the arrangement of the tear-resistant structure, the first fiber yarns and the second fiber yarns have the characteristics of high strength, high modulus, high temperature resistance and the like, and have good impact resistance and corrosion resistance, and the tensile strength and the tear strength are enhanced through the cross distribution of the first fiber yarns and the second fiber yarns; the device has a good anti-tearing function, and the tearing strength of the multi-layer composite fiber membrane is improved.

This invention relates to the field of wastewater treatment technology, specifically providing a multi-stage wastewater treatment device for remote suburbs. The device includes a pool body comprising a bottom, a top, walls, and an isolation wall. The bottom and top are made of flexible, impermeable material. The top has through-holes for connecting pipes. The walls are constructed of an air-supported membrane structure. The bottom and top are fixedly and sealed to the walls, which are located between the top and bottom. The isolation wall divides the interior of the pool body into multiple independent compartments. These compartments are arranged sequentially along the wastewater flow direction, and adjacent compartments are hydraulically connected through through-holes in the isolation wall. The air-supported membrane structure is hollow and filled with a pressurized medium. This invention effectively reduces the construction period and transportation costs of wastewater treatment devices.

The present application belongs to the technical field of bridge wind tunnel test device, and provides a kind of wind tunnel test device simulating nonlinear vibration of bridge structure, including rigid model, rigid rod, rigid circular arc suspension arm, linear tensile spring, nonlinear elastic element and light high-strength fine rope.Nonlinear elastic element can adopt cable structure, membrane structure, nonlinear tensile spring, mechanical super material or superstructure.By designing the nonlinear stiffness characteristics of nonlinear elastic element, the layout mode and the combination mode of linear tensile spring, various target nonlinear stiffness modes can be realized to carry out large amplitude vertical torsional coupled flutter test of bridge structure under nonlinear stiffness.In the process of large amplitude vibration of model, the center hanging point of nonlinear elastic element and linear tensile spring can always maintain vertical displacement and deformation, and the device can ensure stable stiffness, damping, mass and mass moment characteristics.

The invention discloses a maintenance device and method for building structure concrete construction. The maintenance device comprises a supporting plate, the inner wall of the supporting plate is rotationally connected with a film covering structure, the inner wall of the supporting plate is fixedly connected with a humidifying structure, and the outer wall of the supporting plate is fixedly connected with a pressing structure; the invention relates to the technical field of concrete construction and maintenance, according to the film covering structure, the humidifying structure and the pressing structure, felt cloth laying, humidifying, surface compacting and fixed-length cutting can be completed through cooperation of a first supporting roller, a second supporting roller, a first guide roller and a second guide roller on a supporting plate, and through rotation control of a valve shaft and a water outlet hole, the film covering structure can be used for covering the surface of the felt cloth. The water outlet amount is adjusted according to needs, controllable water supply is achieved, a pressing roller is tightly attached to the surface of concrete through cooperation of a supporting rod, a rotating rod and a torsion spring, a cutter is pressed through cooperation of a sliding groove, a sliding rod, a sliding block and an extension spring, the sliding block drives the cutter to move downwards, the cutter and a cutting block fixed to the bottom of a supporting plate extrude, and felt cloth is cut off.

This utility model relates to the field of air-supported membrane structure technology, and more particularly to an air-supported membrane structure door structure and its installation structure, including a truss structure door frame and an airbag door body. The truss structure door frame has an internal cavity for accommodating the airbag door body, which is placed within the cavity. The outer wall of the airbag door body abuts against the inner wall of the truss structure door frame, and the truss structure door frame limits the movement of each side of the airbag door body. Multiple wheels are fixedly installed at the bottom of the truss structure door frame, and several bolt locks are provided on the lower part of one side of the truss structure door frame. A hook structure is provided on the upper part of the side of the truss structure door frame with bolt locks. The beneficial effects of this utility model are: the use of a truss structure door frame to support the airbag door body greatly reduces the weight of the door structure; it ensures the stability of the airbag door body installation and the strength of the entire door structure; it facilitates the installation and disassembly of the door structure at the door installation opening, and facilitates the opening and closing of the door structure.

The goal is to reduce the heating load in winter and the cooling load in summer. [Solution] The membrane structure building comprises a double membrane that constitutes the exterior of the building and has an inner membrane and an outer membrane having a radiative cooling function, and an air blower / discharge device that switches between an insulating mode in which air is blown into the double membrane to form an air layer between the inner membrane and the outer membrane, and a solar radiation shielding mode in which air is discharged from the double membrane to bring the inner membrane and the outer membrane into contact.

The application discloses a membrane-shaped structure with good anti-seepage effect and a construction method, and belongs to the technical field of anti-seepage of building engineering. The membrane-shaped structure with good anti-seepage effect is characterized in that a plurality of strip-shaped protrusions are arranged on the anti-seepage material, the plurality of strip-shaped protrusions protrude from the plane of the membrane-shaped material, and a plurality of drainage recess structures capable of limiting water or / and air and allowing water or / and air to flow are formed, so that the drainage rate and the air permeability effect can be effectively improved, rapid drainage or / and air ventilation is facilitated, the drainage or / and air ventilation effect is good, the structure is simple, practical, easy to construct, high in construction efficiency, and capable of accelerating water flow and enhancing the drainage effect, thereby effectively reducing water residue on the construction surface and avoiding environmental dampness; meanwhile, the structural strength of the membrane-shaped material can be effectively enhanced, the compression resistance and the top breaking resistance of the membrane-shaped material are improved, the rupture of the membrane-shaped material is effectively avoided, and the tensile resistance effect is good.

The utility model discloses a cable-membrane structure center connection node, and relates to the technical field of cable-membrane buildings. The cable membrane connecting node solves the problems that an existing cable membrane connecting node is poor in universality, low in error-tolerant rate, tedious in operation process, low in working efficiency and large in labor cost. An upper seat plate and a lower seat plate are both of a regular polygon plate-shaped structure, a plurality of cable connecting assemblies are arranged between the upper seat plate and the lower seat plate in the circumferential direction, a guide rail sliding block mechanism is arranged between the upper seat plate and the lower seat plate, and two sets of guide rails are horizontally and oppositely installed on the lower surface of the upper seat plate and the upper surface of the lower seat plate respectively. A sliding block locking piece is installed on the upper seat plate, the guide rail located on the upper portion and the sliding block are fixed through the sliding block locking piece, a horizontally-arranged cable connecting hole is formed in the middle of the sliding block, and one end of the cable connecting assembly is rotationally installed in the cable connecting hole of the sliding block. According to the cable-membrane connecting joint, the universality, the installation error-tolerant rate and the working efficiency of the cable-membrane connecting joint are improved, the operation process is simplified, and the labor cost is reduced.

A gas storage reservoir, an energy storage device, and a control method and a mounting method for the gas storage reservoir. An inner foundation structure surrounds the outer side of a ground film; an outer foundation structure surrounds the outer side of the inner foundation structure; the edge of an inner film is fixed to the inner foundation structure; an inner cable net is arranged on the outer surface of the inner film; an accommodating cavity is defined between the inner film and the ground film, and the inner film comprises a metal layer; an outer film structure covers the outside of the inner film structure; the outer film structure comprises an outer film and an outer cable net an interlayer cavity is defined between the outer film and the inner film; an air supply device is configured to inflate the interlayer cavity.

The utility model provides a concrete slab brick moulding bed structure, which relates to the technical field of moulding bed structures, and comprises a moulding bed plate, a connecting device is arranged on one side of the moulding bed plate, the connecting device comprises an L-shaped plate, a supporting device is arranged on one side of the L-shaped plate, a clamping groove is arranged on one side of the L-shaped plate, and the L-shaped plate is connected with the supporting device. A clamping groove is formed in the side, away from the clamping groove, of the L-shaped plate, a clamping block is fixedly connected to the side, away from the clamping groove, of the L-shaped plate, two rectangular grooves are symmetrically formed in the surface of the L-shaped plate, and the size and the shape of the surface of each tire mold plate are matched with the size and the shape of the inner wall of the corresponding rectangular groove. And meanwhile, the corner position between every two adjacent tire mold plates can be reinforced, the situation that the corner position of every two adjacent tire mold plates is fractured or deformed when subjected to concrete pressure, and consequently concrete flows out to affect concrete pouring forming is reduced, and the strength and stability of the corner position after the multiple tire mold plates are spliced are improved.

The utility model provides a waterproof coiled material structure which comprises a coiled material body (3) and is characterized in that the coiled material body (3) comprises waterproof film sleeves (31) and asphalt layers (32), the asphalt layers (32) are filled in the waterproof film sleeves (31), splicing components are arranged on the two sides of the waterproof film sleeves (31) respectively, and the adjacent waterproof film sleeves (31) are connected through the splicing components; the splicing components are arranged on the two sides of the waterproof film sleeves correspondingly, the adjacent waterproof film sleeves are connected through the splicing components, and therefore the laying requirements of different sizes can be met according to the size requirements of the actual positions, needing to be laid, of the waterproof roll, and the application range is effectively widened.

This invention discloses a large-span roof structure, including a central roof structure (1) and peripheral roof structures connected thereto; the central roof structure adopts a membrane-truss-cable composite structure, and the peripheral roof structures adopt a plate-steel frame composite structure; the membrane-truss-cable composite structure includes a membrane structure, an upper truss unit, and a lower truss cable unit, and the plate-steel frame composite structure includes a roof panel structure and a steel frame structure; the outer periphery of the upper truss unit is fixedly connected to the roof panel structure, and the lower truss cable unit is connected to the steel frame structure; the upper truss unit includes a circumferential enclosing truss body, multiple sets of diagonally interlaced arch trusses, and upper diagonal reinforcing rods; the lower truss cable unit includes a lower circumferential enclosing truss body, multiple sets of diagonally interlaced trusses, lower diagonal reinforcing rods, and multiple cables. This invention can ensure that the large-span structure roof has a larger space, more diverse forms, less material usage, and stronger structural stability.

The application provides a complex space cable truss and membrane structure synchronous tensioning and precision control method, comprising: establishing a cable truss and membrane structure coupling nonlinear finite element analysis model, determining construction target; measurement and control system layout and initialization; starting initial tensioning; real-time state monitoring and data processing; intelligent analysis and decision instruction generation; collaborative tensioning execution; real-time safety monitoring; iteration judgment and stage promotion; completion acceptance. Through closed-loop feedback and intelligent algorithm, the application realizes sub-millimeter level accurate control of complex cable membrane structure form and prestress, automatic tensioning and intelligent decision significantly reduces manual intervention and trial and error time, shortens construction period, real-time monitoring and early warning mechanism can discover and handle potential risks in time, avoids over-tensioning or instability, tensioning accurate control can reduce material waste, optimizes equipment use, and detailed data record can provide basis for engineering acceptance and later operation and maintenance.

The application relates to a film structure test tool and a test method, relates to the technical field of film testing, and comprises two to-be-tested assemblies which are arranged at intervals along a first direction and are symmetrically arranged, wherein the to-be-tested assembly comprises a first plywood and a second plywood; a first shielding layer is arranged between the first plywood and the second plywood, a second shielding layer is arranged on the side of the first plywood away from the second plywood, the two second plywoods are connected through a first connecting assembly, the two second shielding layers are fixed through a connecting plate, the connecting plate is arranged on the side of the second shielding layer away from the first connecting assembly, and a fixing plate is fixedly connected between the connecting plate and each second shielding layer; the application further comprises a force measuring device, the force measuring device comprises a fixed end and a moving end, the fixed end is fixedly connected with the first connecting assembly, the moving end is fixedly connected with the connecting plate, and the connecting plate is pulled along a third direction by the moving end. The application has the effect of improving the stress distribution uniformity of the main shielding layer.

The application discloses a photovoltaic panel mounting structure for a cable membrane roof system and a mounting method thereof, and relates to the technical field of solar energy application. The mounting structure comprises a support structure and a mounting platform. The support structure comprises a plurality of vertical high-rise columns and a plurality of connecting pieces. The high-rise columns are connected to the upper ends of original columns of an original roof structure. The mounting platform is connected to the upper ends of the high-rise columns. A plurality of pairs of slide rail groups are arranged above the mounting platform. An adjustable mechanism comprises a fixed frame and two supporting rods. The fixed frame is internally connected with a photovoltaic panel. One end of the supporting rod is rotatably connected with one end of the fixed frame. The other end of the supporting rod is rotatably connected with an edge rail. The bottom end of the fixed frame is provided with a connecting block. The fixed end of a power device is connected with the mounting platform. The moving end of the power device is connected with a rotating shaft. The application can stably mount the photovoltaic panel above the cable membrane structure, improve the space utilization, realize quick adjustment of the inclination degree of the photovoltaic panel, and ensure the power generation efficiency.

This article relates to a membrane ceiling support for supporting the edge of a membrane ceiling against the structural frame (walls, beams, columns, etc.) of a building. As shown in the "Reference Perspective View Showing the Names of Each Part" and the "Reference Exploded Perspective View Showing the Names of Each Part," the membrane ceiling support 10 of this article is composed of a base member 11, a height adjustment member 12, a stopper member 13, a lifting member 14, and a hanging member 15. The base member 11 has a pair of fixed portions 11a, 11a attached to the left and right sides of the flat portion of the base member 11, a pair of guide portions 11b, 11b attached to the left and right sides of the front side of the flat portion of the base member 11 in the up-down direction, a height adjustment member holding portion 11c attached to the lower front side of the flat portion of the base member 11, and an arm portion 11d protruding from the flat portion of the base member 11 to the front side with its tip facing downward. As shown in "Reference Figure 1 Showing the State of Use" and "Reference Figure 2 Showing the State of Use," the fixed portions 11a, 11a are fixed to a structural body such as a wall W using fasteners such as bolts. As shown in "Reference Perspective View Showing the Names of Each Part" and "Reference Exploded Perspective View Showing the Names of Each Part," the guide portions 11b, 11b each have a guide groove extending in the vertical direction, and guide the lifting member 14 in the vertical direction by inserting a guided piece 14a of the lifting member 14 described below. The height adjustment member holding portion 11c is a portion for holding the height adjustment member 12 described below. As shown in "Reference Figure 1 Showing the State of Use" and "Reference Figure 2 Showing the State of Use," the arm portion 11d is a portion for fixing the guide frame 50 to the tip (lower end) of its downward portion. As shown in the "Reference Perspective View Showing the Names of Each Part" and the "Reference Exploded Perspective View Showing the Names of Each Part," height adjustment member 12 is a bolt having a threaded shank and a head, and the threaded shank is inserted from below into a through-hole provided in height adjustment member holding portion 11c of base member 11 and is screwed into a threaded hole provided in lifting member 14. Furthermore, stopper member 13 is a nut that is screwed into the vicinity of the head of the threaded shank of height adjustment member 12 (bolt), thereby preventing height adjustment member 12 inserted into the through-hole of height adjustment member holding portion 11c from falling out.Furthermore, as shown in the "reference exploded perspective view showing the names of each part," the lifting member 14 has a pair of left and right guided pieces 14a, 14a, a screw hole for threading the screw shank of the height adjustment member 12 (bolt), and a through hole for attaching the hanging member 15 described below. The hanging member 15 is made up of a bolt 15a having a screw shank and a head, and a hook 15b that is threaded onto the tip end (lower end) of the screw shank of the bolt 15a, and is attached in a state hanging down from the lifting member 14 by inserting the screw shank of the bolt 15a from above into the through hole provided in the lifting member 14. As shown in "Reference Figure 1 Showing the State of Use," the membrane ceiling supports 10 of this article are fixed in a row at a predetermined interval in the approximately horizontal direction near the ceiling of the structural frame of a building (wall W in the figure), and a guide frame 50 (angle steel, etc.) is fixed and hung across the arm portion 11d of each membrane ceiling support 10. Similarly, membrane ceiling supports 10 are fixed to the structural frame of the building at locations facing these membrane ceiling supports 10 (opposing walls, etc.). The membrane ceiling 100 is constructed by suspending the membrane ceiling 100 (see "Reference Figure 2 Showing the State of Use") between the membrane ceiling support 10 fixed to the structural frame on one side (wall W, etc.) and the membrane ceiling fixed to the structural frame on the other side (opposing wall, etc.). The membrane ceiling 100 is hung around the underside of the guide frame 50, and its edge is hooked to the hook 15b of the hanging member 15. In this embodiment, a slide rail 60 is attached to the edge of the membrane ceiling 100, and a hook extending upward from the slide rail 60 is engaged with the hook 15b. When the head of the height adjustment member 12 (bolt) is manipulated from below using a tool such as a wrench or hex wrench to rotate the height adjustment member 12 (bolt) forward, the lifting member 14 threadedly engaged with the threaded shaft of the height adjustment member 12 (bolt) rises along the guide portion 11b. This allows the membrane ceiling 100 to be in a tensed state. On the other hand, when the height adjustment member 12 (bolt) is rotated in the opposite direction, the lifting member 14 descends along the guide portion 11b. This allows the membrane ceiling 100 to be in a slack state.The membrane ceiling support of this product not only makes it easier to install a membrane ceiling, but also makes it possible to easily adjust the tension of the membrane ceiling after installation.

The invention discloses an anti-collapse pneumatic membrane structure, and relates to the field of building structure design, the anti-collapse pneumatic membrane structure comprises: a mold body, the mold body is provided with an additional cable net; the stiff reinforcing cable pieces are arranged on the main stress paths of the die body; the stiff reinforcing cable piece is a telescopic rod, and when the die body is inflated and formed, the stiff reinforcing cable piece is in a stretched state. By the adoption of the scheme, continuous collapse of the pneumatic membrane structure can be effectively prevented, and structural safety is guaranteed.

The application provides a membrane structure shed. The membrane structure shed comprises a guide rail, the guide rail has a containing cavity, the containing cavity is provided with a tensioning piece; a membrane material, at least part of the membrane material is arranged in the containing cavity, and at least part of the membrane material is wound to the tensioning piece; the membrane material comprises a base layer and a coating layer, the base layer is formed by interweaving warp and weft, and the coating layer is a flame-retardant layer coated on the surface of the base layer. The application can reduce the overall weight of the membrane structure shed and improve the construction efficiency of the membrane structure shed.

The invention relates to a micromechanical pressure sensor (100), comprising a substrate (110) having a layer system (120) arranged thereon. The micromechanical pressure sensor (100) further comprises a sensor structure (200) fixed to the layer system (120) in a self-supporting manner by means of at least one suspension structure (140), the sensor structure has a first membrane structure (210), a second membrane structure (220) and a cavity region (240) which is arranged between the two membrane structures (210, 220) and which is closed by a side wall (230) extending in an edge region (212, 222) of the two membrane structures (210, 220). In this case, the sensor structure (200) comprises an effective capacitor (250), which is arranged in the cavity region (240) between the two diaphragm structures (210, 220), the active capacitor has a first electrode (251) fixed to the first membrane structure (210) and a second electrode (253) arranged between the first electrode (251) and the second membrane structure (220) and fixed to the second membrane structure (220).

The utility model relates to the technical field of greenhouse heat preservation, and particularly discloses a greenhouse heat preservation structure which comprises an inner framework, the inner framework is composed of a plurality of n-shaped rods arranged in parallel, the n-shaped rods of the inner framework are fixedly connected into a whole through the same reinforcing rod, the outer surface of the inner framework is fixedly connected with an inner film, and the inner film is fixedly connected with the outer surface of the inner framework. The upper end of the inner framework is fixedly connected with a top framework, the top framework is of a plurality of arch structures arranged in parallel, the outer surface of the top framework is fixedly connected with a top film, and the inner framework, the top framework, the inner film and the top film form a greenhouse unit. According to the greenhouse heat preservation structure, the inner film and the outer film are arranged to form a double-layer film structure, a double-layer structure is formed, the inner film and the outer film can effectively block heat loss, heat exchange between the interior and the exterior of the greenhouse is reduced, and compared with a traditional greenhouse covered with a single-layer film, the greenhouse heat preservation structure can better maintain the temperature in the greenhouse.