A building curtain wall flatness detection device

Abstract

The application provides a kind of architectural curtain wall flatness detection device, it is related to curtain wall flatness detection technical field, including shell, the four corners of shell are equipped with connecting column;The four corners edges of soft film are respectively fixed to the end of each connecting column away from shell, and are unfolded in flat state;Resistance wire is equipped with multiple, resistance wire is arranged in soft film interior in longitudinal and transverse staggered, and when soft film is stretched and deformed, its resistance value changes, and multiple resistance wires have independent current loop respectively;Display component is set on shell, resistance wire is electrically connected with display component, and display component is partitioned and set to longitudinal and transverse arrangement resistance wire, for showing corresponding current or voltage change data based on the resistance change of resistance wire.The application can detect the flatness of curved surface architectural curtain wall more conveniently, and significantly improve the efficiency and accuracy of detection.

Description

Technical Field

[0001] This invention relates to the field of curtain wall flatness testing technology, and more specifically, to a device for testing the flatness of building curtain walls. Background Technology

[0002] In modern architectural engineering, curtain walls, as an important component of building facade decoration and protection, are increasingly diverse in their structural forms. These include not only a large number of conventional flat curtain walls but also a growing number of irregularly shaped curved curtain wall structures, to meet the artistic and functional requirements of architectural design. However, the installation precision of curtain walls directly affects the building's aesthetics, safety, and service life; therefore, a flatness test of the surface is usually required after installation.

[0003] For traditional planar curtain walls, flatness testing methods are relatively mature. Efficient testing can typically be achieved using laser rangefinders, benchmark measurements, or laser leveling instruments, offering good operability and precision control. However, when dealing with curved curtain walls with free-form surfaces or curvatures, the lack of a uniform reference plane on their surface makes traditional testing methods difficult to apply directly, hindering the effective assessment of overall curvature consistency and local deformation. Summary of the Invention

[0004] The purpose of this invention is to provide a flatness testing device for building curtain walls, which can conveniently test the flatness of curved building curtain walls, significantly improving the efficiency and accuracy of the test.

[0005] This invention is achieved through the following technical solution: A building curtain wall flatness testing device, comprising: The housing has connecting posts at its four corners; The soft membrane is fixed at its four corner edges to the ends of each connecting post away from the shell and is laid out in a flat state. Multiple resistance wires are provided, which are arranged in a crisscross pattern inside the soft membrane. When the soft membrane is stretched and deformed, its resistance value changes. Each of the multiple resistance wires has an independent current loop. A display component is disposed on the housing. The resistance wire is electrically connected to the display component. The display component partitions the resistance wires arranged longitudinally and laterally to display corresponding current or voltage change data based on the resistance change of the resistance wires.

[0006] Furthermore, the connecting columns are hinged at the four corners of the housing and can swing outward at a certain angle. A reset member is provided between each connecting column and the housing. The reset member is used to drive the connecting column back to its original position after it swings.

[0007] Furthermore, the connecting column swings outward at an angle of 1° to 10° along the hinge point of the housing.

[0008] Furthermore, the resistance wire is made of a conductive structure that can change its resistance due to deformation, and the conductive structure includes one or a combination of the following: Liquid metal channels, ion-conducting polymers, carbon nanotube conductive films, or elastic composite materials containing conductive particles; The conductive structure is encapsulated and installed within the soft film or sandwiched between the multiple layers of the soft film, and its resistance changes as the soft film is stretched.

[0009] Furthermore, the resistive wire within the soft film also includes a resistive wire arranged diagonally, which also has an independent current loop and is electrically connected to the display component.

[0010] Furthermore, the housing has an air cavity on the side facing the PVC membrane, and a fan assembly is provided in the air cavity. The fan assembly is used to blow air onto the surface of the PVC membrane, so that the PVC membrane adheres tightly to the curved curtain wall being tested.

[0011] Furthermore, the display component includes a voltage or current reading circuit, a signal processing module, and a display screen. The signal processing module is used to convert the electrical signals of each resistance wire into visual images or values ​​and display them on the display screen.

[0012] Furthermore, multiple resistance wires are led out to the display component inside the housing via flexible ribbon cables, which are detachably connected to the soft film.

[0013] Furthermore, the end of the connecting post away from the shell is configured as a spherical structure, and the end face of the spherical structure is tangential to the soft membrane.

[0014] Furthermore, a connecting membrane is provided between the periphery of the soft membrane and the housing, and the air cavity is located within the circumferential connecting membrane.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: 1. This invention achieves real-time response to deformation across the entire detection area by setting a soft film on the shell and crisscrossing multiple resistance wires with independent current loops inside the soft film, combined with the zone display capability of the display component. When the soft film is attached to the surface of the building curtain wall, if there are local twists, steps, or surface differences, the corresponding area of ​​the soft film will be stretched, causing a change in the resistance of the resistance wires in that area, which in turn causes a change in the measured voltage or current value. Because the strain caused by stretching is non-uniform, the change in the electrical signal generated by the resistance wires also has non-linear characteristics, which can more clearly reflect the flatness of the curtain wall surface.

[0016] 2. This invention uses resistance wires to form independent current loops, and arranges them in longitudinal and transverse sections on the display component. This facilitates the separation and accurate reading of deformation signals of the flexible film in different directions, avoiding data recognition difficulties caused by circuit interference or signal mixing. By individually reading the resistance changes in each direction, it is possible to further determine in which direction the curtain wall surface has abnormal stretching, thereby inferring whether there are flatness defects such as warping, dents, or twisting at the corresponding location, improving the efficiency and accuracy of the detection data analysis. Attached Figure Description

[0017] Figure 1 This invention aims to demonstrate the overall structure of one side of the soft membrane of a building curtain wall flatness detection device; Figure 2 This invention aims to demonstrate the overall structure of one side of the display screen of a building curtain wall flatness detection device; Figure 3 This is a schematic diagram illustrating the internal structure of the housing. Figure 4 This is a schematic diagram illustrating the structure of the diaphragm and connecting pillars of this invention; Figure 5 This invention aims to illustrate the structural diagram of resistance wires arranged longitudinally, laterally, and obliquely on a flexible membrane; Reference numerals: 1-Housing, 11-Air chamber, 12-Handle, 13-Receiving groove, 2-Connecting column, 21-Reset component, 22-Hinge shaft, 23-Spherical structure, 3-Soft membrane, 4-Resistance wire, 5-Display assembly, 51-Display screen, 6-Fan assembly, 61-Fan blower, 7-Flexible cable, 8-Connecting membrane. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] The following is for reference Figures 1-5As shown in the illustration, and further explained with reference to specific embodiments, this embodiment provides a building curtain wall flatness testing device, including a housing 1. The housing 1 can be made of metal plate or high-strength plastic molding, possessing lightweight and impact-resistant properties, making it easy for on-site construction personnel to hold and use. A pair of handles 12 are installed on the housing 1, symmetrically arranged on opposite sides of the housing 1, using bolt fixing or slot installation methods, facilitating stable gripping and movement by personnel during the testing process, improving the controllability and safety of the equipment. Four connecting columns 2 are provided at the four corners of the housing 1, each connecting column 2 forming a structurally fixed or rotatable connection with the housing 1, serving as support points for the flexible membrane 3.

[0021] Reference Figure 1 and Figure 4 As shown, the four corner edges of the flexible membrane 3 are fixed to the ends of each connecting column 2 away from the housing 1, and are laid out in a flat state. The flexible membrane 3 is preferably made of a composite material with good elasticity, such as thermoplastic polyurethane (TPU), silicone rubber composite film, or flexible laminate material with electrical insulation properties, to ensure its stability under repeated stretching and deformation. The four corner edges can be installed to the ends of the connecting columns 2 by means of adhesive, riveting, clamping, or snap-fit, or a dedicated slot structure can be provided for quick replacement. The flexible membrane 3 is basically in a naturally unfolded state when not under force. When it is attached to the surface of the building curtain wall, it will stretch due to the deformation of the curtain wall surface, thereby realizing the detection.

[0022] Multiple resistance wires 4 are arranged in a crisscross pattern within the flexible membrane 3. Preferably, the resistance wires 4 are pre-embedded between the membrane layers or fixed to the membrane structure by methods such as etching, electrospinning, electro-spraying, or stitching, enabling them to exhibit resistance changes under tension. To ensure detection resolution and anti-interference capability, each resistance wire 4 is connected to an independent power supply to form an independent current loop, without affecting each other. These loops are connected to the display component 5 via corresponding signal paths, ensuring good discriminative power and real-time response of the measurement results.

[0023] The display component 5 is mounted on the housing 1, and its outer shell is connected to the housing 1 by screws or fittings, facilitating later maintenance and upgrades. The display component 5 includes a reading circuit for reading the electrical signals of each resistance wire 4 and transmitting these signals to the internal processing module. The display component 5 partitions the longitudinally and laterally arranged resistance wires 4 to prevent signal cross-interference and improve the processing accuracy of data in each direction. The display component 5 is used to display the corresponding current or voltage change data based on the resistance change of the resistance wires 4. This data can be used to intuitively determine the local deformation area or overall flatness deviation of the curtain wall.

[0024] Reference Figure 1 and Figure 3As shown, four connecting posts 2 are hinged at the four corners of the housing 1 via hinge shafts 22. At the same time, four outwardly diverging receiving grooves 13 are provided at the four corners of the housing 1. A part of the connecting posts 2 is located in the receiving grooves 13 to improve the stability of the connecting posts 2. The four connecting posts 2 can swing outward at a certain angle around the hinge shafts 22 located at the corners of the housing 1.

[0025] A reset element 21 is provided between each connecting post 2 and the housing 1. In this embodiment, the reset element 21 is a torsion spring, sleeved on the hinge shaft 22 or located in an elastic groove between the connecting post 2 and the housing 1, to provide a stable return force. In other embodiments, the reset element 21 can be a rubber spring, a shape memory alloy sheet, or a corrugated sheet elastic element to achieve reset characteristics with different strengths and response speeds. The reset element 21 is used to drive the connecting post 2 to rebound to its original position after swinging. This original position is generally the position where the connecting post 2 is perpendicular to the housing 1, thereby ensuring the initial flatness of the soft membrane 3 in a non-stressed state.

[0026] Furthermore, the angle at which the connecting column 2 swings outward relative to the housing 1 along the hinge point is 1° to 10°. This angle range can be controlled by a limiting block or an angle buffer mechanism to avoid over-tensioning of the membrane 3 or causing detection errors. It should be noted that during the detection process, this slight oscillation allows the membrane 3 to more flexibly conform to the curtain wall surface with a certain curvature or local irregularities. At the same time, since the stretching of the membrane 3 within this angle range is a linear change, this part of the background resistance change signal can be eliminated through a preset calibration experiment. In addition, an angle sensor can be installed on the hinge shaft 22 and connected to the display component 5 via a ribbon cable to realize dynamic monitoring and correction compensation of the membrane 3 angle adjustment process.

[0027] Specifically, the resistance wire 4 is made of a conductive structure whose resistance changes with deformation. The conductive structure may include one or a combination of the following: a liquid metal channel (such as gallium indium alloy) encapsulated in a flexible tube, a conductive gel or polymer film based on ion migration, an elastomeric composite film with carbon nanotubes or graphene conductive mesh distributed on the surface, and a rubber composite material embedded with conductive particles (such as Ag particles). The conductive structure is encapsulated and installed inside the soft film 3 or sandwiched between the multilayer structures of the soft film 3 by means of hot pressing lamination, spin coating, 3D printing microchannels, etc., and generates an effective and stable resistance change when stretched by the soft film 3, which is suitable for the needs of non-uniform curved surface detection.

[0028] As an optional embodiment, refer to Figure 5The resistance wire 4 inside the soft film 3 also includes resistance wires 4 arranged diagonally, the number of which can be flexibly adjusted according to the size of the curtain wall area to enhance the response sensitivity to diagonal twisting or spiral deformation; this type of resistance wire 4 also has an independent current loop and is electrically connected to the display component 5 by plug or soldering to avoid data mixing and improve the multidimensional signal analysis capability.

[0029] Reference Figure 3 As shown, the housing 1 has an air cavity 11 on the side facing the flexible membrane 3. The air cavity 11 is formed by injection molding or welding to create a closed structure, and a fan assembly 6 is installed inside. The fan assembly 6 includes at least a pair of blowers 61, which are located symmetrically on both sides of the housing 1 or inside the air cavity 11, and deliver air into the air cavity 11 through air guide pipes. In this embodiment, the fan assembly 6 is controlled by a power supply module to provide a stable outward airflow pressure during the application of the flexible membrane 3, which promotes a tighter fit of the flexible membrane 3 to the curtain wall surface and reduces sources of error such as wrinkling and floating membrane during the inspection process.

[0030] Furthermore, the display component 5 includes a voltage or current reading circuit, a signal processing module, and a display screen 51. The reading circuit corresponds to each resistance wire 4 and can read and acquire its changing current or voltage signals in real time. The signal processing module includes an MCU control unit, an AD conversion module, and a signal filtering algorithm unit, which can synchronously process signals from different directions and regions (this part is existing technology and will not be elaborated here). The converted values ​​or trends are displayed intuitively on the display screen 51 in the form of images, tables, heat maps, etc., so that on-site personnel can quickly identify them. The display screen 51 can be a color LCD screen, a flexible OLED screen, or a portable e-ink screen, etc., with good outdoor visibility and low power consumption characteristics.

[0031] As an optional embodiment, the display component 5 further supports the function of displaying animated images. It can dynamically fit the trend of resistance value change through the image driver chip and present animation effects such as fluctuation graphs and deformation cloud graphs on the display screen 51 to help users judge the trend and compare the test results. It also supports data storage and USB export functions to realize on-site data collection and subsequent engineering quality archiving.

[0032] Optionally, multiple resistance wires 4 are led out to the display component 5 inside the housing 1 through flexible ribbon cables 7. The ribbon cables can be multi-core ultra-fine ribbon cables with bending resistance and insulation protection performance. The ends of the ribbon cables are provided with plugs and connect with the docking sockets on the soft film 3 to realize quick installation, removal and replacement of resistance wires 4 or soft film 3 components, thereby improving on-site maintenance efficiency.

[0033] Reference Figure 4As shown, the end of the connecting column 2 away from the shell 1 is set as a spherical structure 23. The spherical structure 23 can be formed by molding or by connecting a ball head assembly. Its end face is tangential to the membrane 3. It can automatically adjust the bonding angle during the swinging process to adapt to different curvature changes of the curved curtain wall and improve the bonding uniformity and local response consistency of the membrane 3 under different installation conditions.

[0034] As an optional embodiment, a connecting membrane 8 is provided between the periphery of the soft membrane 3 and the housing 1. The connecting membrane 8 is annularly arranged and is made of the same material as the soft membrane 3 or a flexible material with good air permeability. The air cavity 11 is located inside the annular connecting membrane 8. When the fan blows air, a stable airflow environment that applies pressure to the soft membrane 3 can be formed through the connecting membrane 8, which effectively improves the adhesion of the soft membrane 3 and prevents external wind interference.

[0035] The device operates as follows: First, the device is moved to the curtain wall area to be inspected, and the area of ​​the flexible membrane 3 on the housing 1 is aligned with the position to be inspected. By gripping the handle 12 on the housing 1, the operator applies appropriate pressure to initially adhere the flexible membrane 3 to the curtain wall surface. Subsequently, the fan assembly 6 is turned on, and the airflow blown from the air chamber 11 further presses the flexible membrane 3 against the curtain wall, making it tightly conform to the local contour of the curtain wall, improving inspection accuracy and eliminating air gap interference between the flexible membrane 3 and the curtain wall.

[0036] During the bonding process, if there are uneven areas on the curtain wall surface, such as warping, dents, or glass distortion, the corresponding area of ​​the flexible membrane will undergo corresponding stretching or torsional deformation, which will cause a change in the resistance of the resistive wires inside the flexible membrane. Since each resistive wire is connected to an independent current loop and communicates with the display component, this change will be converted into a current or voltage change signal in real time, and then visualized as an image, numerical value, or heat map after being processed by the display component.

[0037] Operators can quickly identify the location and extent of abnormal deformation in the curtain wall based on the trend of electrical signal changes on the display screen, thereby enabling quantitative judgment of the flatness of the curved curtain wall and local problem location, thus improving the efficiency and accuracy of the inspection.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for detecting the flatness of building curtain walls, characterized in that, include: A housing (1), wherein connecting posts (2) are provided at the four corners of the housing (1); The soft membrane (3) is fixed at the four corner edges of each of the connecting posts (2) at the end away from the shell (1) and is laid out in a flat state. Multiple resistance wires (4) are provided. The resistance wires (4) are arranged in a crisscross pattern inside the soft film (3). When the soft film (3) is stretched and deformed, its resistance value changes. Each of the multiple resistance wires (4) has an independent current loop. The display component (5) is disposed on the housing (1). The resistance wire (4) is electrically connected to the display component (5). The display component (5) divides the resistance wire (4) arranged in the longitudinal and transverse directions into zones for displaying the corresponding current or voltage change data based on the resistance change of the resistance wire (4). The connecting column (2) is hinged at the four corners of the housing (1) and can swing outward at a certain angle. A reset member (21) is provided between each connecting column (2) and the housing (1). The reset member (21) is used to drive the connecting column (2) to spring back to its original position after it swings. The housing (1) has an air cavity (11) on the side facing the soft membrane (3). A fan assembly (6) is provided in the air cavity (11). The fan assembly (6) is used to blow air onto the surface of the soft membrane (3) so that the soft membrane (3) is tightly attached to the curved curtain wall being tested.

2. The building curtain wall flatness detection device according to claim 1, characterized in that, The connecting column (2) swings outward at an angle of 1° to 10° along the hinge point of the housing (1).

3. The building curtain wall flatness detection device according to claim 1, characterized in that, The resistance wire (4) is made of a conductive structure that can change its resistance due to deformation, and the conductive structure includes one or a combination of the following: Liquid metal channels, ion-conducting polymers, or elastic composite materials containing conductive particles; The conductive structure is encapsulated and installed inside the soft film (3), and its resistance changes as the soft film (3) is stretched.

4. The building curtain wall flatness detection device according to claim 1, characterized in that, The resistive wire (4) in the soft film (3) also includes a resistive wire (4) arranged diagonally, which also has an independent current loop and is electrically connected to the display component (5).

5. The building curtain wall flatness detection device according to claim 1, characterized in that, The display component (5) includes a voltage or current reading circuit, a signal processing module, and a display screen (51). The signal processing module is used to convert the electrical signals of each resistance wire (4) into visual images or values ​​and display them on the display screen (51).

6. The building curtain wall flatness detection device according to claim 5, characterized in that, Multiple resistance wires (4) are led out to the display component (5) inside the housing (1) via flexible ribbon cables (7), which are detachably connected to the soft film (3).

7. The building curtain wall flatness detection device according to claim 1, characterized in that, The end of the connecting post (2) away from the shell (1) is configured as a spherical structure (23), and the end face of the spherical structure (23) is tangential to the soft membrane (3).

8. The building curtain wall flatness detection device according to claim 6, characterized in that, A connecting membrane (8) is provided between the periphery of the soft membrane (3) and the shell (1), and the air cavity (11) is located within the circumferential connecting membrane (8).

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