Holographic acoustic module arc roof installation construction method

Abstract

The application belongs to the technical field of architectural acoustics construction, and discloses a holographic acoustic module arc roof installation construction method, which completes curved surface partition and prefabrication through a 1:1 three-dimensional BIM model, generates a deviation analysis report by combining three-dimensional laser point cloud data comparison, automatically compensates installation errors through an AI algorithm, matches grid positioning and angle reference double positioning, and realizes real-time inclination angle feedback, so that the module installation deviation is controlled in a very small range, the installed module does not need to be removed for rectification, construction cost and construction period loss are reduced, arc curvature is matched, the broadband sound absorption effect of the holographic acoustic module is ensured, the curved surface roof installation precision and acoustic basic performance are synchronized to reach the standard, the automatic engagement of concave-convex tenon and groove between modules, magnetic sheet adsorption, elastic acoustic sealing strip sealing, the control of the splicing gap within 0.5 mm, the avoidance of sound diffraction and reflection interference, and the attenuation of vibration transmission through the butyl rubber acoustic isolation layer and the buffer assembly.

Description

Technical Field

[0001] This invention belongs to the field of architectural acoustic construction technology, specifically a method for installing a holographic acoustic module on an arc-shaped ceiling. Background Technology

[0002] The holographic acoustic module consists of a sound-absorbing substrate formed by micro-foaming of inorganic mineral fiber mixture and an 80μm nano-microporous sound-absorbing coating on the surface. It achieves a wide-band holographic sound absorption effect through a double-layer asymmetric absorption frequency material. Compared to traditional acoustic materials, it simplifies the keel structure, reduces the use of cavities and filling materials, and matches actual keel installation processes. However, existing methods for installing holographic acoustic modules on arched ceilings still have the following technical problems: The curved ceiling is a curved structure. Traditional manual measurement and layout methods are greatly affected by factors such as the skill level of the construction workers and the ambient lighting, making it difficult to match the curvature of the ceiling. This can easily lead to cumulative errors and cause deviations in the installation position of the modules. Such deviations not only disrupt the overall uniformity of the sound field of the ceiling and affect the broadband sound absorption effect of the holographic acoustic modules, but also cause misalignment of adjacent modules, further aggravating construction defects. Subsequent rectification requires the removal of the installed modules, increasing construction costs and time.

[0003] In current construction, modular splicing often uses simple adhesive or snap-fit ​​connections, lacking positioning and sealing structures. This results in uneven gaps between modules, frequently leading to misalignment and warping. Excessive gaps can cause sound diffraction and reflection interference, disrupting the integrity of holographic acoustics and causing problems such as dead zones and echoes in the sound field. Misalignment and warping not only affect the aesthetics of the ceiling surface but also cause uneven stress on the modules, making them prone to detachment and damage over long-term use, thus affecting the stability of construction quality.

[0004] The installation accuracy of holographic acoustic modules directly determines the final acoustic effect. However, the current construction process lacks effective real-time acoustic testing methods, and acoustic testing is only carried out once after all construction is completed. If problems such as uneven sound field distribution or substandard acoustic indicators are found at this time, the installed modules are difficult to adjust and large-scale demolition and reconstruction are required. This not only wastes materials and labor, but also seriously delays the construction cycle. Furthermore, it is impossible to detect in time the real-time impact of details such as module installation angle and splicing gaps on the sound field distribution during construction, resulting in the final acoustic indicators failing to meet the design requirements. Summary of the Invention

[0005] The purpose of this invention is to provide a method for installing a holographic acoustic module on an arc-shaped ceiling, so as to solve one or more problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for installing a holographic acoustic module on a circular arc ceiling, comprising the following specific steps: Furthermore, in the modeling and pre-division stage, a 1:1 three-dimensional BIM model of the arc-shaped ceiling is established using Revit, and then imported into professional acoustic design software for sound field simulation analysis. Combining the sound absorption coefficient and frequency response characteristics of the holographic acoustic module, the curved surface of the arc-shaped ceiling is partitioned and optimized into standard module units and irregular edge-finishing units. The module installation angle baseline and acoustic performance baseline parameters are preset in the BIM model. Generate a unique code, three-dimensional coordinates, machining parameters and installation sequence table for each module unit, export them to the factory for CNC machining prefabrication, adopt curvature pre-correction process during prefabrication, and perform factory calibration through special arc detection tooling after module formation; The BIM model integrates information on professional pipelines, including fire sprinklers, HVAC, and low-voltage cable trays, performs collision checks and comprehensive layout, reserves installation holes for equipment, pre-sets annular acoustic sealing grooves at the edges of the holes, and builds a construction simulation module in the BIM model to simulate the entire module installation process.

[0007] Furthermore, the scanning and positioning stage uses a 3D laser scanner to comprehensively scan the base layer of the arc-shaped ceiling at the construction site based on the BIM model, unique code, 3D coordinates and processing and prefabrication parameters generated in the modeling and pre-segmentation stage, to obtain point cloud data. By automatically comparing the point cloud data with the BIM model, a deviation analysis report is generated. An AI installation deviation compensation algorithm is used to automatically calculate the deviation adjustment value of each installation point, adjust the module installation reference surface, and use a total station to establish a three-dimensional spatial positioning reference network on the ceiling base and set reference control points. After the reference network is laid out, a laser line projector is used to project the installation boundary line, center positioning point and angle reference line of each module unit, forming a dual installation positioning system of grid positioning and angle reference. A magnetic positioning reference is set at each reference control point, and an inclination sensor is embedded in the top of the magnetic positioning reference to provide real-time feedback on the inclination angle of the reference surface.

[0008] Furthermore, the keel installation stage is based on the three-dimensional spatial positioning reference network, reference control points and adjusted module installation reference surface laid out in the scanning and positioning stage. According to the keel layout diagram exported from the BIM model, an adjustable arc-shaped light steel keel system is installed. The main keel is made of hot-dip galvanized square steel and is connected to the ceiling base through adjustable hangers. Each hanger is equipped with a double nut adjustment mechanism and a pressure sensor to monitor the stress on the hanger in real time. The secondary keel uses a flexible light steel keel, which is connected to the main keel through a special arc-shaped connector. The spacing of the secondary keel matches the width of the module, and the connector has a built-in elastic buffer pad. After installation, use a laser level and straightedge to check the curvature and flatness of the keel system, and use acoustic testing instruments to test the vibration transmission attenuation performance of the keel system.

[0009] Furthermore, the isolation laying stage is based on the adjustable arc-shaped light steel keel system installed in the keel installation stage. A layer of butyl rubber acoustic isolation layer is laid on the keel system, and the full-lay method is used for construction and compaction is carried out with a special pressure roller. On the surface of the acoustic isolation layer, prefabricated magnetic positioning pieces are pasted according to the module installation position. The position of the magnetic positioning pieces corresponds one-to-one with the adsorption magnetic pieces on the back of the module. The magnetic positioning pieces are made of neodymium iron boron material. A non-slip and wear-resistant coating is sprayed onto the surface of the magnetic positioning plate, and a positioning guide groove is added, which is filled with acoustic sealant.

[0010] Furthermore, in the module installation stage, based on the acoustic isolation layer laid in the isolation laying stage and the fixed magnetic positioning pieces, the holographic acoustic modules are installed sequentially from the lowest point of the arc ceiling, from bottom to top and from the middle to both sides, according to the installation sequence table generated by the BIM model. During installation, the magnetic adsorption pieces on the back of the module are aligned with the magnetic positioning pieces on the base layer, and the module is pushed so that the magnetic pieces are automatically adsorbed and fixed. The curved surface structure of the arc-shaped ceiling has natural stress distribution characteristics. Starting from the lowest point of the arc-shaped ceiling, the installation can extend symmetrically from bottom to top, evenly distributing the installation stress. The installation sequence can effectively reduce stress accumulation during the splicing process, avoid defects such as widening gaps, misalignment, and warping of modules due to extrusion, and achieve coordinated control of structural stress, installation accuracy, and acoustic performance.

[0011] Both the adsorption magnetic sheet and the magnetic positioning sheet are made of high-energy-product neodymium iron boron permanent magnet material and are treated with an anti-rust and anti-corrosion coating. The magnetic attraction force is matched with the module's self-weight and the curved surface tilt angle, providing a stable and reliable adsorption force at different tilt angles of the arc ceiling, avoiding problems such as slippage, sagging, and warping of the module during curved surface installation. The magnetic sheet adopts an embedded structure and is integrated with the module body. It automatically aligns during adsorption and forms a double positioning and fixing structure with the tenon and slot interlocking structure. This ensures that the module fits tightly with the acoustic isolation layer and the keel system, eliminating installation gaps, and also maintains the integrity of the module's curved surface curvature through uniform force, avoiding local deformation that affects installation accuracy and acoustic sealing effect.

[0012] The modules are connected by a triple connection structure of tenon and mortise, magnetic attraction and sealing. The sides of adjacent modules are pre-set with concave and convex tenons and grooves, and elastic acoustic sealing strips are embedded in the tenons and grooves. When they are connected, the tenons and grooves automatically interlock, and the magnetic sheets built into the sides attract each other. After each row of modules is installed, use a straightedge and feeler gauge to check the splicing gaps. Use a portable digital holographic sound field measurement system to detect sound leakage at the splicing points. If sound leakage is found, adjust the tenon and mortise engagement and magnetic attraction.

[0013] Furthermore, the acoustic detection stage is based on the holographic acoustic module splicing construction completed in the module installation stage. During the module installation process, a portable digital holographic sound field measurement system is used to perform real-time acoustic detection on the installed area. The detected sound field distribution data, sound absorption coefficient data, and sound attenuation data are compared with the design acoustic parameters in the BIM model in real time to generate an acoustic deviation cloud map and data report. Through AI acoustic performance analysis algorithm, areas with substandard acoustic performance are automatically identified and specific fine-tuning suggestions are given. Based on the fine-tuning suggestions, the construction personnel fine-tune the installation angle and position of the modules or replace the module units with different sound absorption coefficients. After fine-tuning, real-time testing is carried out again until the sound field distribution, sound absorption coefficient, sound attenuation and other indicators meet the design requirements. At the same time, all test data and fine-tuning records are synchronously entered into the BIM model to form an acoustic construction archive.

[0014] Furthermore, in the edge finishing inspection stage, based on the acoustic testing stage confirming that the acoustic performance of the installed modules meets the standards, prefabricated arc-shaped edge finishing modules are installed at the junction of the arc ceiling and the walls, beams and columns. The edge finishing modules and standard modules adopt the same mortise and tenon, magnetic attraction and sealing triple connection structure, and the edges of the edge finishing modules are preset with arc transition edges. At locations where access ports are required, install openable magnetic access control modules. The connection method between the access control module and surrounding modules is the same as that of standard modules. When opening, the modules can be removed by using a special suction cup to pull them up. When closing, they are automatically attached and fixed. The dimensions of the access control module are the same as those of standard modules, and a removable acoustic buffer layer is added inside.

[0015] The beneficial effects of this invention are as follows: 1. This invention completes the curved surface partitioning and prefabrication through a 1:1 3D BIM model, generates a deviation analysis report by comparing 3D laser point cloud data, automatically compensates for installation errors through AI algorithms, and controls the module installation deviation to a very small range with dual positioning benchmarks and real-time tilt feedback. This solution does not require the removal and rectification of the installed modules, reducing construction costs and time losses. Matching the arc curvature ensures the broadband sound absorption effect of the holographic acoustic module, allowing the installation accuracy of the curved ceiling and the basic acoustic performance to meet the standards simultaneously.

[0016] 2. This invention utilizes the automatic interlocking of interlocking tongues and grooves between modules, magnetic adsorption, and sealing with elastic acoustic sealing strips to control the splicing gaps within 0.5mm, avoiding sound diffraction and reflection interference and ensuring the integrity of holographic acoustics. The butyl rubber acoustic isolation layer and buffer components attenuate vibration transmission, and the magnetic positioning plate enables rapid module positioning, eliminating problems such as dead zones and echoes in the sound field, and ensuring uniform force on the modules to prevent detachment and damage during long-term use. Simultaneously, it improves the aesthetics, structural safety, and acoustic performance stability of the ceiling.

[0017] 3. This invention uses a portable digital holographic sound field measurement system to collect acoustic data in real time, compares it with BIM design parameters to generate a deviation cloud map, and uses an AI algorithm to automatically identify substandard areas and provide fine-tuning solutions. Construction personnel can adjust the module angle or replace units in real time. All detection and fine-tuning data are simultaneously entered into BIM to form an acoustic construction archive. The entire process controls the impact of installation details on the sound field, ensuring that all acoustic indicators meet the standards, reducing material and labor waste, shortening the construction cycle, and improving the controllability of construction quality. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating the overall installation and construction process of the holographic acoustic module for the arc-shaped ceiling of this invention. Figure 2 This is a flowchart of the holographic acoustic module splicing and installation process of the present invention. Detailed Implementation

[0019] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 2 As shown, this embodiment of the invention provides a method for installing a holographic acoustic module on a circular arc ceiling, including the following specific steps: In this embodiment of the invention, the pre-modeling stage uses Revit to create a 1:1 three-dimensional BIM model of the arc-shaped ceiling, imports it into professional acoustic design software for sound field simulation analysis, and combines the sound absorption coefficient and frequency response characteristics of the holographic acoustic module to optimize the curved surface of the arc-shaped ceiling by partitioning it into standard module units and irregular edge-trimming units. The size of each standard module unit is controlled within 1200mm×600mm, and the curvature radius deviation is ≤0.5mm. The module installation angle baseline and acoustic performance baseline parameters are preset in the BIM model. The sound field simulation analysis uses the building dimensions, usage functions, target reverberation time, and permissible noise level of the space where the curved ceiling is located as core input conditions. It fully simulates the propagation law of sound waves in the curved space, including reflection, refraction, scattering, and sound absorption. It focuses on identifying high-risk areas of the curved ceiling that are prone to sound focusing, echoes, uneven sound field distribution, and insufficient sound absorption efficiency. Combining the unique broadband sound absorption coefficient, frequency response curve, and nanoporous sound absorption mechanism of the holographic acoustic module, the curved surface of the curved ceiling is divided into zones for optimization. Areas with uniform sound field and regular curvature are set as standard module installation areas, while areas with abrupt curvature changes, corner intersections, and sound field interference are set as irregular edge module installation areas. The module type and installation angle are matched through zoning.

[0021] Generate a unique code, three-dimensional coordinates, machining parameters and installation sequence table for each module unit, export them to the factory for CNC machining prefabrication, adopt curvature pre-correction process during prefabrication, and perform factory calibration through special arc detection tooling after module formation; The curvature pre-correction process involves simultaneously applying directional shaping pressure that perfectly matches the designed curvature of the arc-shaped ceiling throughout the entire process of micro-foaming and shaping of the inorganic mineral fiber mixture. This pressure is maintained until the module cools after shaping, ensuring that the curvature of the prefabricated module matches the curvature of the ceiling on site. After shaping, the module undergoes factory calibration using a special arc-shaped testing fixture made of high-strength aluminum alloy. The fixture surface is machined with an arc-shaped reference mold that perfectly matches the designed curvature. During factory calibration, feeler gauges are used to check the fit gap between the module surface and the arc-shaped reference mold point by point along the length and width of the module. The test data is recorded throughout the process to control the factory curvature radius deviation of the module to ≤0.5mm. At the same time, the uniformity and integrity of the 80μm nano-microporous sound-absorbing coating on the surface of each module are checked one by one, and unqualified products with coating damage, micropore blockage, or surface defects are rejected.

[0022] Information on professional pipelines such as fire sprinklers, HVAC, and low-voltage cable trays is integrated into the BIM model. Collision checks and comprehensive layout are performed, and equipment installation holes are reserved. The edges of the holes are pre-set with annular acoustic sealing grooves. A construction simulation module is built in the BIM model to simulate the entire module installation process.

[0023] In this embodiment of the invention, the scanning and positioning stage, based on the BIM model, unique code, three-dimensional coordinates, and processing / prefabrication parameters generated in the modeling and pre-segmentation stage, uses a three-dimensional laser scanner to comprehensively scan the base layer of the arc-shaped ceiling at the construction site to obtain point cloud data. Through automatic comparison between the point cloud data and the BIM model, the point cloud density is ≥100 points / cm². 2 Generate a deviation analysis report; The automated comparison process first converts the on-site 3D laser point cloud data and the BIM design model into the same 3D spatial coordinate system, completing coordinate normalization and benchmark alignment to eliminate systematic errors caused by coordinate system differences. Then, using the installation point of each module as the basic unit, it extracts the measured 3D coordinates, surface elevation, and radian data of the base layer point by point, comparing them one-to-one with the design parameters in the BIM model, calculating the planar position deviation, vertical elevation deviation, spatial angle deviation, and surface curvature deviation respectively. Based on the magnitude of the deviation, it classifies it into three levels: qualified, warning, and exceeding the standard, automatically generating a visualized deviation analysis report containing the specific location of the deviation, the quantified value of the deviation, the range of influence of the deviation, and the risk level of the deviation.

[0024] AI installation deviation compensation algorithm is used to automatically calculate the deviation adjustment value of each installation point, adjust the module installation reference surface, and use a total station to establish a three-dimensional spatial positioning reference network on the ceiling base. In combination with the accuracy requirements of this construction, the number of reference control points shall not be less than 12, the flatness deviation of the keel surface shall be ≤1mm / 2m, and the curvature deviation shall be ≤1mm. The three-dimensional spatial positioning reference network is laid out in a grid pattern according to the curved surface partition of the arc ceiling. The grid size of the reference network is completely matched with the size of the module unit. The reference control points are made of stainless steel and are fixed to the solid structure of the ceiling base with expansion bolts, avoiding weak areas such as pipelines and holes. The surface of the control points is treated with rust prevention and marking, and a conspicuous positioning number is set. Finished products are protected to avoid positioning failure due to construction collisions and pollution. The reference network and control points together constitute a stable three-dimensional spatial positioning system.

[0025] The AI ​​installation deviation compensation algorithm uses multi-dimensional input data, including 3D point cloud data of the arc-shaped ceiling base layer at the construction site, 3D coordinate data of the BIM model module, module prefabrication parameters, arc surface design curvature parameters, and measured data of base layer flatness. It outputs quantitative data such as 3D offset of the single module installation reference surface, spatial angle correction value, point coordinate compensation value, keel adjustment parameters, and surface adaptation correction coefficient. The algorithm consists of a spatial coordinate registration module, a surface curvature fitting module, a deviation clustering analysis module, an installation mechanical constraint verification module, and a compensation parameter generation module connected sequentially. First, coordinate registration aligns the point cloud data with the BIM model, eliminating coordinate system errors. Then, curvature fitting restores the actual surface shape of the base layer at the site. Cluster analysis identifies areas of concentrated local deviations. Combining mechanical constraints such as module installation load-bearing capacity, curvature adaptation, and structural stability, it automatically calculates and generates unique compensation parameters adapted to the arc-shaped ceiling surface, ensuring a direct and unique correspondence between the compensation value and the site base layer condition, module installation accuracy, and surface curvature requirements.

[0026] After the reference grid is laid out, a laser line projector is used to project the installation boundary line, center positioning point and angle reference line of each module unit, forming a dual installation and positioning system of grid positioning and angle reference. A magnetic reference base is set at each reference control point, with an inclination sensor embedded in the top to provide real-time feedback on the inclination angle of the reference surface.

[0027] The grid-like positioning system is based on a three-dimensional spatial reference network. Laser projection is used to delineate the planar installation boundaries, center points, and splicing gaps of each module, constraining the installation position of the module on the horizontal plane. The angular reference system uses a magnetic reference base and tilt sensors as its core to control the spatial tilt angle and surface fit of each module, ensuring that the module curvature is completely consistent with the ceiling design curvature. The dual positioning system works synchronously, verifies each other, and complements each other, providing full constraints on module installation from both planar position and spatial angle dimensions.

[0028] The magnetic reference base adopts a strong magnetic base design, which can be adsorbed and fixed at the reference control point position. It is easy to install and disassemble without damaging the base structure. The tilt sensor embedded in the top is a digital sensor with a measurement accuracy of up to 0.01°. It can collect the spatial tilt angle data of the reference surface in real time and wirelessly transmit it to the on-site construction terminal. Construction personnel can view the tilt angle deviation in real time and adjust the positioning reference and installation angle in a timely manner.

[0029] In this embodiment of the invention, the keel installation stage is based on the three-dimensional spatial positioning reference network, reference control points and adjusted module installation reference surface laid out in the scanning and positioning stage. According to the keel layout diagram exported from the BIM model, an adjustable arc-shaped light steel keel system is installed. The main keel is made of hot-dip galvanized square steel and is connected to the ceiling base through adjustable hangers. The hanger spacing is ≤1000mm. Each hanger is equipped with a double nut adjustment mechanism and a pressure sensor, which can realize a height adjustment range of ±50mm and monitor the stress of the hangers in real time. The double-nut adjustment mechanism consists of two locking nuts, one above the other. The height of the boom can be adjusted within a range of ±50mm by rotating the nuts. After adjustment, the two nuts are locked in place to prevent the boom from loosening and sliding. The pressure sensor is embedded in the connection between the boom and the main keel to collect the load-bearing pressure data of the boom in real time and set a safe stress threshold. When the pressure exceeds the threshold, the on-site terminal issues an early warning to promptly investigate potential hazards such as uneven stress on the keel and overload.

[0030] The secondary keel uses flexible 38×12×0.8mm light steel keel, which is connected to the main keel through a special arc connector. The spacing of the secondary keel matches the module width. The connector has built-in elastic buffer pads to reduce the impact of keel vibration transmission on acoustic performance. The elastic buffer pad is custom-made from aging-resistant and highly elastic EPDM rubber with an overall thickness of 3mm. It is firmly installed at the contact points between the arc-shaped connector and the main and secondary keels through an embedded slot structure. Its own elastic deformation effectively blocks the transmission of rigid vibration between the main and secondary keels, reducing the interference of structural vibration on the sound absorption effect of the acoustic module. The special arc-shaped connector adopts a segmented bending structure formed by stamping galvanized steel plate. The connection angle can be flexibly adjusted according to the actual curvature of the arc ceiling on site, adapting to the installation requirements of curved surfaces with different curvatures, ensuring that the secondary keel always remains parallel and in close contact with the installation surface of the module.

[0031] After installation, use a laser level and straightedge to check the curvature and flatness of the keel system, and adjust it to ensure that the surface flatness deviation is ≤1mm / 2m and the curvature deviation is ≤1mm. Use acoustic testing instruments to test the vibration transmission attenuation performance of the keel system to ensure that the vibration transmission attenuation performance is ≥20dB.

[0032] The curvature of the keel is checked by fitting a curved test template with the same curvature as the design section by section. The flatness is checked by measuring point by point with a 2m straightedge and feeler gauge. The vibration transmission attenuation performance is checked by a professional acoustic vibration meter. A standard vibration source is applied to the main keel and vibration data is collected at the secondary keel. The vibration attenuation is calculated. Any unqualified parts are corrected in time by fine adjustment through the hanger adjustment mechanism. Only after passing the test can the next process be carried out.

[0033] In this embodiment of the invention, the isolation laying stage is based on the adjustable arc-shaped light steel keel system installed in the keel installation stage. A 2mm thick butyl rubber acoustic isolation layer is laid on the keel system, and the full-lay method is used for construction. The overlap at the joint is ≥50mm, and it is compacted with a special pressure roller. The butyl rubber acoustic isolation layer is made of high-density damping butyl rubber material with a standard thickness of 2mm. It has excellent sound insulation, vibration reduction, and sealing and waterproofing performance. When laying it, it is constructed using the full-lay method. The joints of the isolation layer are overlapped, with the overlap width controlled to be no less than 50mm. Neutral acoustic sealant is evenly applied to the overlap interface, and a special rubber roller is used to repeatedly roll and compact it along the overlap seam. The overall weighted sound insulation of the butyl rubber acoustic isolation layer is no less than 25dB, which can effectively block solid sound and airborne sound transmitted from the ceiling base structure and prevent external vibration and noise from interfering with the normal sound absorption of the holographic acoustic module.

[0034] On the surface of the acoustic isolation layer, prefabricated magnetic positioning pieces are pasted according to the module installation position. The position of the magnetic positioning piece corresponds one-to-one with the adsorption magnetic piece on the back of the module. The positioning accuracy is ≤ ±0.3mm. The magnetic positioning piece is made of neodymium iron boron material and has an adsorption force ≥ 50N. A non-slip and wear-resistant coating is sprayed onto the surface of the magnetic positioning plate, and a positioning guide groove is added, which is filled with acoustic sealant.

[0035] The positioning guide groove is a rectangular groove structure that matches the edge dimensions of the holographic acoustic module. The groove depth is 2mm, and the width is exactly the same as the module thickness, which can guide and limit the module installation. The acoustic sealant filled inside the guide groove is a neutral silicone acoustic adhesive. After curing, the adhesive remains elastic and has the triple properties of sealing, sound insulation, and vibration reduction. During module installation, it is smoothly pushed in along the positioning guide groove. At the same time, the sealant fills the tiny gap between the module and the magnetic positioning piece, forming a complete sealed sound insulation layer after curing.

[0036] In this embodiment of the invention, the module installation stage is based on the acoustic isolation layer laid in the isolation laying stage and the fixed magnetic positioning piece. According to the installation sequence table generated by the BIM model, the holographic acoustic module is installed from the lowest point of the arc ceiling from bottom to top and from the middle to both sides. During installation, the magnetic adsorption piece on the back of the module is aligned with the magnetic positioning piece on the base layer, and the module is pushed so that the magnetic piece is automatically adsorbed and fixed. The splicing quality inspection focuses on the splicing gap width, surface flatness, tenon and groove engagement depth, and magnetic adsorption adhesion as core evaluation indicators. A feeler gauge is used to inspect the module splicing gaps point by point, and a special curved straightedge is used to check the flatness of the splicing surface to ensure that there are no misalignments, no warping, and no height differences. Sound leakage detection uses a portable digital holographic sound field measurement system to collect sound energy data segment by segment at the splicing gaps to determine whether there are leakage problems such as airborne sound transmission, sudden changes in sound energy, and abnormal sound field. If the test fails, the module tenon and groove engagement depth, magnetic adsorption adhesion force, and elastic sealing strip compression state are adjusted, and the test is repeated until the splicing quality and acoustic sealing performance all meet the standards.

[0037] During installation, the process is divided into multiple installation sections according to the curvature of the surface. After every 3-5 rows of modules are installed, the curvature and flatness are checked. The continuity of the curved surface is verified by using an arc-shaped straightedge and a laser level. After the modules are initially magnetically attached, they can be temporarily fixed with temporary positioning clips to prevent the modules from slipping or misaligning. The temporary clips are removed after the tenons of adjacent modules are engaged and sealed. The installation sequence from bottom to top and from the middle to both sides can effectively release the installation stress on the curved surface.

[0038] The modules are connected by a triple connection structure of tenon and mortise, magnetic attraction and sealing. The sides of adjacent modules are pre-set with concave and convex tenons and grooves, and elastic acoustic sealing strips are embedded in the tenons and grooves. When they are connected, the tenons and grooves automatically interlock, and the magnetic sheets built into the sides attract each other. The elastic acoustic sealing strip is custom-molded from high-density porous polyurethane acoustic sealing material. Its cross-section is a trapezoidal structure that perfectly matches the tongue and groove of the module. After installation, the sealing strip is in a 30% micro-compression state, which can ensure that the adjacent modules are tightly spliced ​​without loosening, misalignment, or warping. It can also absorb residual sound energy at the splicing gap through its own porous sound-absorbing structure. The sealing strip, together with the automatic interlocking of the tongue and groove and the mutual adsorption of the side magnetic sheets, forms a stable triple connection structure, which can control the module splicing gap within 0.5mm.

[0039] After each row of modules is installed, use a straightedge and feeler gauge to check the splicing gaps to ensure that the gap width is ≤0.5mm and the surface flatness deviation is ≤0.5mm. Use a portable digital holographic sound field measurement system to detect sound leakage at the splicing points. If sound leakage is found, adjust the interlocking degree of the mortise and tenon joints and the magnetic attraction force.

[0040] In this embodiment of the invention, the acoustic detection stage is based on the holographic acoustic module splicing construction completed in the module installation stage. During the module installation process, a portable digital holographic sound field measurement system is used to perform real-time acoustic detection on the installed area. The measurement frequency range is 20Hz-20kHz, and the spatial resolution is ≤10cm. Before the testing operation begins, the measurement system is calibrated for zero point, sensitivity, and range using a first-class standard acoustic calibrator. At the same time, the ambient temperature, humidity, and air pressure data are recorded and input into the system for parameter compensation to eliminate the interference of environmental factors on the acoustic test data. During the data acquisition process, a single holographic acoustic module is used as the basic test unit. A standardized test grid is divided, and acoustic data such as sound field distribution, sound absorption coefficient, and sound attenuation in the full frequency band of 20Hz-20kHz are collected unit by unit and point by point. The spatial resolution is controlled to be ≤10cm to ensure that the test data can correspond to the installation position and splicing status of each module.

[0041] The detected sound field distribution data, sound absorption coefficient data, and sound attenuation data are compared with the design acoustic parameters in the BIM model in real time to generate an acoustic deviation cloud map and data report. Through the AI ​​acoustic performance analysis algorithm, areas with substandard acoustic performance are automatically identified and fine-tuning suggestions are given. The acoustic deviation cloud map is calculated based on the difference between measured acoustic data and BIM design baseline data. Different colors are used to visually indicate the degree of acoustic deviation in different areas: red areas represent substandard sound absorption coefficients, severely uneven sound field distribution, and unacceptable sound attenuation; yellow areas represent minor acoustic deviations that do not affect overall use but require optimization; and green areas represent fully compliant acoustic indicators. The deviation cloud map is linked in real-time with the 3D coordinates and unique module codes of the BIM model, allowing direct location of the module number, installation position, and splicing point corresponding to the deviation area. This enables construction personnel to intuitively and quickly identify acoustic defects without complex data analysis. Combined with fine-tuning suggestions from AI acoustic performance analysis algorithms, the corresponding modules can be directly adjusted in terms of position, angle, and sealing.

[0042] The AI ​​acoustic performance analysis algorithm uses real-time sound field distribution data, 20Hz-20kHz full-band sound absorption coefficient data, sound attenuation data, BIM model preset acoustic performance benchmark parameters, module installation position coordinates, and measured splicing gap data collected by a portable digital holographic sound field measurement system as full-dimensional input data. It outputs executable data such as coordinates of acoustically substandard areas, module installation angle fine-tuning values, splicing gap sealing correction amounts, magnetic attraction force adjustment suggestions, and sound absorption performance optimization schemes. The algorithm includes a sound field data normalization module, a design benchmark comparison module, a sound absorption performance fitting module, a construction defect mapping module, and a fine-tuning instruction generation module. First, it normalizes the measured acoustic data to eliminate environmental noise interference. Then, it compares the data point-by-point and frequency-by-frequency with the BIM design benchmark. Through performance fitting, it determines the type and degree of acoustic defects and maps acoustic deviations to the corresponding installation module's position, angle, gap, magnetic attraction force, and other construction parameters. It automatically generates a visualized and implementable fine-tuning scheme, achieving real-time linkage control between acoustic performance indicators and module installation construction parameters.

[0043] Based on the fine-tuning suggestions, the construction personnel fine-tune the installation angle and position of the modules or replace the module units with different sound absorption coefficients. After fine-tuning, real-time testing is carried out again until the sound field distribution, sound absorption coefficient, sound attenuation and other indicators meet the design requirements. At the same time, all test data and fine-tuning records are synchronously entered into the BIM model to form an acoustic construction archive.

[0044] The fine-tuning process follows a control procedure of measurement, analysis, correction, and retesting. The AI ​​algorithm directly converts acoustic deviation data into executable construction adjustment instructions, clearly indicating specific parameters such as the angle fine-tuning direction, position offset, magnetic adhesion force, and sealing strip compression state of the corresponding module. Construction personnel operate according to the instructions. After each module adjustment is completed, a local acoustic retest is immediately conducted, and the retest data is sent back to the system for secondary verification, without affecting surrounding modules or the overall sound field.

[0045] The acoustic construction archive adopts a digital cloud storage mode. The entered content includes a unique code for each module, three-dimensional coordinates, installation time, measured acoustic data, fine-tuning records, inspection personnel information, deviation compensation parameters and other full-process data. The archive data is linked with the BIM model in real time, and the corresponding construction information can be traced through the module code.

[0046] In this embodiment of the invention, the edge finishing inspection stage is based on the acoustic testing stage to confirm that the acoustic performance of the installed modules meets the standards. At the junction of the arc ceiling and the wall, beam and column, a prefabricated arc edge finishing module is installed. The edge finishing module and the standard module adopt the same mortise and tenon, magnetic attraction and sealing triple connection structure. The edge of the edge finishing module is preset with an arc transition edge, and the transition edge is filled with acoustic sealant between the wall, beam and column. Before filling, the wall surface and beam-column junction surface are cleaned to remove dust, laitance, oil and other impurities, ensuring that the sealant adheres firmly to the base layer without hollow areas. The acoustic sealant is a neutral, weather-resistant acoustic adhesive, applied in two layers. The first layer deeply fills the gaps, and the second layer is smoothed to form a sealing surface that smoothly connects with the curved transition edge, ensuring no air bubbles, no gaps and no leakage. This sealing structure blocks the airborne sound transmission channels at the edge, ensuring that the acoustic performance of the edge area is consistent with that of the standard module area.

[0047] The arc-shaped transition edge adopts a flexible arc structure integrally formed with the edge trim module. The arc naturally connects with the curved surface of the ceiling, wall surface, and beam and column facade. The joint gap between the transition edge and the wall surface and beam and column is evenly filled with acoustic sealant. The sealant is fully and densely filled and has a smooth and flat surface, maintaining the continuity and uniformity of the overall acoustic performance of the arc ceiling.

[0048] At locations where access ports are required, install openable magnetic access modules. The connection method between the access modules and surrounding modules is the same as that of standard modules. When opening, they can be removed by using a special suction cup to pull them up. When closing, they are automatically attached and fixed. The dimensions of the access modules are the same as those of standard modules, and a removable acoustic buffer layer is added inside. The special suction cup is a large-diameter vacuum silicone suction cup with an adsorption area that matches the surface of the maintenance module. When in use, the suction cup is tightly attached to the center of the maintenance module, and the air is expelled by pressing to form a vacuum adsorption state. The maintenance module can be separated from the surrounding modules by lifting it vertically and smoothly. The disassembly process is without prying, scratching, or damage to the magnetic structure and acoustic sealing strip. When resetting, the module is aligned with the positioning position and gently pushed to automatically close the magnetic adsorption.

[0049] The acoustic buffer layer is made of multiple layers of composite acoustic sound-absorbing materials, consisting of an inorganic mineral fiber sound-absorbing layer, an elastic rubber buffer layer, and a damping sound insulation layer. It is detachable and installable using environmentally friendly Velcro, making installation and removal simple and quick without affecting the magnetic opening and closing function of the maintenance module. This buffer layer can tightly fill the cavity gap between the maintenance port and the ceiling base layer, ensuring that the acoustic performance of the maintenance area is completely consistent with that of the standard module area, maintaining the continuity and uniformity of the sound field of the entire arc ceiling, while also playing a role in buffering and vibration reduction, extending the service life of the maintenance module. Finally, the entire ceiling surface is cleaned to complete the entire construction process.

[0050] Before cleaning and construction, the overall curved surface of the arched ceiling was verified. The curvature and acoustic reflection path designed in the BIM model were used as the verification benchmark. A three-dimensional laser level was used to scan the entire area of ​​the ceiling, and the three-dimensional coordinates, curvature, and elevation data of each point were collected and compared with the design parameters point by point. At the same time, a special curved ruler was used to check the smoothness of the curved surface segment by segment. Special attention was paid to checking whether there were any defects such as misalignment, warping, or local concavity and convexity at the module splicing parts to ensure that the curved surface was continuous and regular, and to avoid acoustic defects such as sound focusing, echo, and uneven sound field caused by changes in the sound wave propagation path due to abnormal shape.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for installing a holographic acoustic module arc ceiling, characterized in that, The specific steps include the following: In the modeling and pre-division stage, a 3D BIM model of the arched ceiling is created using building information modeling software. The model is then imported into professional acoustic design software for sound field simulation and analysis. The surface partitioning is optimized by combining the acoustic characteristics of the holographic acoustic module. Standard module units and irregular edge-cutting units are divided, and dedicated parameters for each module are generated and exported to the factory for processing and prefabrication. At the same time, pipeline information is integrated to complete collision checks and construction simulation. During the scanning and positioning phase, a 3D laser scanner is used to acquire the base point cloud data of the construction site, which is compared with the BIM model and the AI ​​installation deviation compensation algorithm is used to compensate for the installation deviation. A 3D spatial positioning reference network and control points are set up, and the installation positioning lines are projected to form a dual installation positioning system of grid-like positioning and angle reference. The tilt angle of the reference surface is fed back in real time through the tilt sensor embedded in the magnetic reference base on the reference control point. During the keel installation phase, based on the keel layout diagram exported from the BIM model, an adjustable curved light steel keel system is installed, and the keel curvature, flatness, and vibration transmission attenuation performance are tested. During the isolation laying stage, an acoustic isolation layer is laid based on the completed keel system and the joints are treated. Magnetic positioning pieces are fixed on the surface of the isolation layer and sealed and anti-slip treatment is carried out to achieve the positioning and sealing pretreatment of the module and the base layer. During the module installation phase, based on the completed acoustic isolation layer and magnetic positioning structure, the holographic acoustic modules are installed according to the installation sequence preset in the BIM model. The modules are spliced ​​using a triple connection structure of tenon, mortise and tenon, magnetic attraction and sealing. The splicing quality is checked and adjusted in a timely manner. During the acoustic testing phase, a portable digital holographic sound field measurement system is used to conduct real-time acoustic testing on the installed area. The test data is compared with the BIM model design parameters to identify substandard areas and make fine adjustments. During the edge finishing and maintenance phase, based on the module areas that meet the acoustic testing standards, arc-shaped edge finishing modules are installed and sealed, while openable magnetic maintenance modules are also set up.

2. The method of claim 1, wherein the method further comprises: providing a plurality of acoustic modules; and mounting the plurality of acoustic modules to the circular arc ceiling. The modeling and pre-division stage uses Revit software to create a 1:1 3D BIM model of the arc-shaped ceiling, imports it into professional acoustic design software for sound field simulation analysis, and optimizes the curved surface of the arc-shaped ceiling by partitioning it into standard module units and irregular edge units, based on the sound absorption coefficient and frequency response characteristics of the holographic acoustic module. The module installation angle baseline and acoustic performance baseline parameters are preset in the BIM model.

3. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 2, characterized in that, The modeling pre-segmentation generates a unique code, three-dimensional coordinates, processing parameters, and installation sequence table for each module unit and exports them to the factory. The BIM model integrates professional pipeline information, including fire sprinklers, HVAC, and low-voltage cable trays, performs collision checks and comprehensive layout, reserves equipment installation holes, and builds a construction simulation module to simulate the entire module installation process.

4. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 3, characterized in that, The scanning and positioning stage uses a 3D laser scanner to comprehensively scan the base layer of the arc-shaped ceiling at the construction site to obtain point cloud data. The deviation analysis report is generated by automatically comparing the point cloud data with the BIM model. An AI installation deviation compensation algorithm is used to automatically calculate the deviation adjustment value of each installation point and adjust the module installation reference surface.

5. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 4, characterized in that, In the scanning and positioning stage, a total station is used to establish a three-dimensional spatial positioning reference network on the ceiling base and set reference control points. Magnetic reference bases are set at the reference control points, and tilt sensors are embedded in the top of the magnetic reference bases. After the reference network is laid out, a laser line projector is used to project the installation boundary line, center positioning point and angle reference line of each module unit, forming a dual installation and positioning system of grid-like positioning and angle reference.

6. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 5, characterized in that, The keel installation stage is based on the established three-dimensional spatial positioning reference network, reference control points, and adjusted module installation reference surface to install an adjustable arc-shaped light steel keel system. The main keel is connected to the ceiling base through adjustable hangers. Each hanger is equipped with a double nut adjustment mechanism and a pressure sensor. The pressure sensor monitors the stress on the hanger in real time. The secondary keel is connected to the main keel through a special arc-shaped connector with built-in elastic buffer pads. The spacing of the secondary keels matches the module width.

7. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 6, characterized in that, During the isolation laying stage, a butyl rubber acoustic isolation layer is laid on the keel system using a full-lay method and compacted with a special pressure roller. Pre-made magnetic positioning pieces are pasted on the surface of the acoustic isolation layer according to the module installation position. The position of the magnetic positioning piece corresponds one-to-one with the adsorption magnetic piece on the back of the module. An anti-slip and wear-resistant coating is sprayed on the surface of the magnetic positioning piece, and a positioning guide groove is added. The guide groove is filled with acoustic sealant.

8. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 7, characterized in that, During the module installation phase, the holographic acoustic modules are installed sequentially from the lowest point of the arched ceiling, from bottom to top and from the middle to both sides, according to the installation sequence table generated by the BIM model. During installation, the magnetic adsorption sheet on the back of the module is aligned with the magnetic positioning sheet on the surface of the acoustic isolation layer, and then the module is pushed to allow the magnetic sheet to automatically adsorb and fix it. The modules adopt a triple connection structure of tenon and mortise, magnetic attraction and sealing. After each row of modules is installed, the splicing gaps and sound leakage are checked.

9. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 8, characterized in that, The triple connection structure between the modules is as follows: the sides of adjacent modules are pre-set with concave and convex tenons and grooves, and elastic acoustic sealing strips are embedded in the tenons and grooves. When they are connected, the tenons and grooves automatically interlock and the side magnetic sheets attract each other to achieve splicing and sealing. If sound leakage is found, the interlocking degree of the concave and convex tenons and grooves and the magnetic attraction force are adjusted.

10. The method for installing a holographic acoustic module on a circular arc ceiling according to claim 9, characterized in that, The acoustic testing phase compares the detected sound field distribution data, sound absorption coefficient data, and sound attenuation data with the design acoustic parameters in the BIM model in real time, generates an acoustic deviation cloud map and data report, automatically identifies areas with substandard acoustic performance through AI acoustic performance analysis algorithms and provides fine-tuning suggestions, and tests are conducted again until all indicators meet the design requirements. At the same time, all test data and fine-tuning records are synchronously entered into the BIM model to form an acoustic construction archive. The arc-shaped edge trimming module in the edge trimming and maintenance stage adopts the same mortise and tenon, magnetic attraction, and sealing triple connection structure as the standard module. The edge trimming module has a pre-set arc transition edge. The connection method between the openable magnetic attraction maintenance module and the surrounding modules is the same as that of the standard module. When opening, a special suction cup is used to adsorb and pull to complete the disassembly. When closing, it is automatically adsorbed and fixed. A removable acoustic buffer layer is added inside the openable magnetic attraction maintenance module.

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