Modular sound insulation and damping assembly fixing structure for an automotive door trim panel

Abstract

This invention discloses a modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels, relating to the field of automotive interior component assembly and fixing technology. The structure includes a door interior panel substrate, a modular sound insulation and vibration damping unit, elastic vibration isolation fixing nodes, node-internal compression acquisition components, zoned vibration response acquisition components, and a control unit. The modular sound insulation and vibration damping unit is disposed on the side of the door interior panel substrate facing the inner sheet metal of the door. The elastic vibration isolation fixing nodes connect the door interior panel substrate and the inner sheet metal of the door, forming a pre-compression fit. The control unit generates a modular compression consistency constraint state based on the compression state, generates a sound bridge vibration intrusion state based on the vibration response, and maps it to a two-dimensional boundary field to obtain a fixed node state machine boundary parameter set, used to output abnormal fixed node positioning information or maintenance prompt information, thereby reducing the risk of local loosening, hard contact sound bridges, and abnormal noises.

Description

Technical Field

[0001] This invention relates to the field of automotive interior component assembly and fixing technology, and more specifically, to a modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels. Background Technology

[0002] The interior door panels are a crucial component of the passenger compartment interior system. Typically installed on the side of the door panel facing the passenger compartment, they conceal the internal door structure, support functional components such as armrests and speakers, and, in conjunction with sound insulation, sound absorption, and vibration damping materials, improve the sound quality of the door closing, isolate road noise, and suppress localized door panel vibrations. For new energy vehicles and high-configuration passenger cars, where the basic background noise level is lower, the impact of door closing, low-frequency speaker vibrations, rough road surface excitation, and localized loosening, door panel humming, and friction noises caused by long-term disassembly and repair are more easily perceived by users. Therefore, the long-term reliability of the assembly and fixation of the door interior panels and modular sound insulation and vibration damping units directly impacts the overall perceived quality of the vehicle and after-sales maintenance costs.

[0003] CN111376014B discloses an automated system for the combined assembly of snap fasteners and sound insulation cotton, which involves structures such as a robotic arm, a workpiece flipping worktable, a workpiece rotating worktable, a sound insulation cotton feeding device, and snap fastener assembly equipment. It is mainly used to solve the problems of inconvenient assembly and low assembly efficiency of snap fasteners and sound insulation cotton.

[0004] The aforementioned existing technologies are centered around assembly stations or assembly equipment. The workpiece to be assembled is fixed to a corresponding tooling or workbench. Sound insulation cotton is fed to a predetermined position using a sound insulation cotton feeding device, and then clips are installed onto the corresponding parts of the workpiece using a clip assembly device or robotic arm. This type of solution already incorporates common technical features such as sound insulation cotton, clips, workpiece carriers, sound insulation cotton feeding mechanisms, and clip assembly mechanisms. It can improve the assembly efficiency of sound insulation cotton and clips at the production end and establish an initial assembly fit between the sound insulation cotton and clips on the workpiece to be assembled.

[0005] However, during the long-term service of automotive door trim panels after installation, modular sound insulation and vibration damping units are also affected by factors such as door closing impact, low-frequency vibration of speakers, road surface excitation, temperature and humidity changes, and after-sales disassembly and reassembly. The existing technologies mentioned above mainly focus on how the clips and sound insulation cotton are assembled at the production end, making it difficult to determine whether the modular sound insulation and vibration damping units remain effectively compressed at each fixed node after assembly and long-term use. It also makes it difficult to identify whether the fixed nodes have formed hard-contact sound bridges due to excessive compression, fatigue loosening, or material rebound attenuation. This is because existing assembly equipment typically aims to complete material loading, positioning, clip installation, and workpiece handling, lacking a benchmark for acquiring the compression state embedded in the force transmission path of the fixed nodes, and also lacking a mechanism for verifying and locating abnormal fixed nodes that combines the consistency of node compression with local vibration response.

[0006] Therefore, it is still necessary to provide a modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels, so that a reliable modular mechanical connection can be formed between the door interior panels and the inner sheet metal of the door. At the fixing nodes, it can also take into account the functions of tolerance pre-compensation, structural vibration isolation and bridge breaking, compression state identification and sound bridge vibration intrusion verification, thereby reducing the risk of local loosening, hard contact sound bridge and abnormal noise of the door interior panels after assembly and during long-term service. Summary of the Invention

[0007] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels. This structure integrates pre-compression compensation, vibration isolation bridge, compression state acquisition, and zoned vibration verification structures at elastic vibration isolation fixing nodes. Furthermore, it utilizes the module compression consistency constraint state and the acoustic bridge vibration intrusion state to jointly modulate the state switching boundary of the underlying state machine, thereby solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels includes a door interior panel substrate, a modular sound insulation and vibration damping unit, an elastic vibration isolation fixing node, a node-internal compression acquisition component, a zoned vibration response acquisition component, and a control unit. The modular sound insulation and vibration damping unit is disposed on the side of the door interior panel substrate facing the inner sheet metal of the door. The elastic vibration isolation fixing node connects the door interior panel substrate to the inner sheet metal of the door and forms a pre-compression fit with the modular sound insulation and vibration damping unit. The control unit is connected to both the node-internal compression acquisition component and the zoned vibration response acquisition component. The compression acquisition component is used to acquire the compression state at the elastic vibration isolation fixed node, and the partition vibration response acquisition component is used to acquire the vibration response of the door interior panel substrate. The control unit generates a module compression consistency constraint state based on the compression state within a preset analysis window, generates a sound bridge vibration intrusion state based on the vibration response, and maps the module compression consistency constraint state and the sound bridge vibration intrusion state to a two-dimensional boundary field to obtain a fixed node state machine boundary parameter set, so as to modulate the state switching boundary of the underlying state machine used to output abnormal fixed node positioning information or maintenance prompt information.

[0009] In a preferred embodiment, the door interior panel substrate is provided with functional zones on the side facing the inner sheet metal of the door. The functional zones include at least one of the following: door lock impact zone, speaker vibration zone, armrest stress zone, lower drainage zone, and peripheral sealing zone; the modular sound insulation and vibration damping unit is disposed in the corresponding functional zone.

[0010] In a preferred embodiment, the modular sound insulation and vibration damping unit includes a bonding buffer layer, a sound-absorbing damping layer, a support limiting layer, and a flexible sealing edge; the bonding buffer layer is disposed facing the inner sheet metal of the vehicle door, the support limiting layer is disposed facing the interior panel substrate of the door, the sound-absorbing damping layer is located between the bonding buffer layer and the support limiting layer, and the flexible sealing edge is disposed at the edge of the modular sound insulation and vibration damping unit.

[0011] In a preferred embodiment, the elastic vibration isolation fixing node includes a snap-fit ​​connection part, a dual-material vibration isolation seat, a multi-stage pre-compression compensation umbrella skirt, a compression transmission plate, and a sound bridge anti-sound gap groove; the snap-fit ​​connection part snaps into the inner sheet metal of the vehicle door, the dual-material vibration isolation seat is disposed between the snap-fit ​​connection part and the inner panel substrate of the door, the multi-stage pre-compression compensation umbrella skirt is disposed on the side of the dual-material vibration isolation seat facing the modular sound insulation and vibration damping unit, the compression transmission plate is disposed between the multi-stage pre-compression compensation umbrella skirt and the modular sound insulation and vibration damping unit, and the sound bridge anti-sound gap groove is disposed at an isolation position of the elastic vibration isolation fixing node, the isolation position including at least one of the position between the snap-fit ​​connection part and the compression transmission plate, and the position within the dual-material vibration isolation seat.

[0012] In a preferred embodiment, the dual-material vibration isolation seat includes a rigid positioning outer ring and an elastic suspension inner ring; the rigid positioning outer ring cooperates with the door interior panel substrate, and the elastic suspension inner ring is disposed around the snap-fit ​​connection portion and located between the snap-fit ​​connection portion and the door interior panel substrate.

[0013] In a preferred embodiment, the multi-stage pre-compression compensation umbrella skirt includes a first compensation skirt edge, a second compensation skirt edge, and a third compensation skirt edge arranged sequentially along the axial direction of the snap-fit ​​connection portion; a micro-damping cavity is formed between adjacent compensation skirt edges, and the micro-damping cavity is connected to the back cavity of the door interior panel substrate through a micro-pressure relief port.

[0014] In a preferred embodiment, the node-inherent compression acquisition component is disposed at the compression acquisition position of the elastic vibration isolation fixed node. The compression acquisition position includes at least one of the deformation path of the multi-stage pre-compression compensation umbrella skirt and the position between the compression transfer piece and the third compensation skirt edge. The node-inherent compression acquisition component includes a first segmented contact piece, a second segmented contact piece, and an elastic spacer. The control unit determines the compression range of the corresponding elastic vibration isolation fixed node based on the contact state between the first segmented contact piece and the second segmented contact piece.

[0015] In a preferred embodiment, the zoned vibration response acquisition component includes a door lock zone vibration acquisition element and a speaker zone vibration acquisition element; the door lock zone vibration acquisition element is disposed in the door lock impact zone, and the speaker zone vibration acquisition element is disposed in the speaker vibration zone.

[0016] In a preferred embodiment, the control unit determines the compression range of a single elastic vibration isolation fixing node based on the module compression ratio, determines the compression consistency among multiple elastic vibration isolation fixing nodes within the same modular sound insulation and vibration damping unit based on the module compression discrete amount, and generates the module compression consistency constraint state by combining the continuity of the compression range between adjacent elastic vibration isolation fixing nodes and the migration direction of the compression range within multiple analysis windows.

[0017] In a preferred embodiment, the control unit generates the acoustic bridge vibration intrusion state based on the normalized peak vibration ratio, vibration decay time, phase deviation state, and number of discrete impact peaks. The underlying state machine includes an effective compression holding state, a compression verification state, a flexible compression state, an acoustic bridge isolation verification state, an abnormal fixed node positioning state, and a maintenance reminder state. The fixed node state machine boundary parameter set is used to modulate the entry boundary, exit boundary, verification window, and hysteresis boundary of the underlying state machine between the effective compression holding state, the compression verification state, the flexible compression state, the acoustic bridge isolation verification state, the abnormal fixed node positioning state, and the maintenance reminder state.

[0018] The technical effects and advantages of the modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels of this invention are as follows: This invention improves the sound insulation, vibration reduction, and assembly adaptability of the door interior panel by setting a modular sound insulation and vibration damping unit between the door interior panel substrate and the inner sheet metal of the door, and by using elastic vibration isolation fixing nodes to perform partitioned assembly and pre-compression holding. This allows the modular sound insulation and vibration damping unit to be arranged in a targeted manner according to different working conditions of the door lock impact area, speaker vibration area, armrest stress area, lower drainage area, and surrounding sealing area, thereby reducing the risk of local loosening, edge warping, and abnormal noise of the door panel.

[0019] This invention incorporates a dual-material vibration isolation seat, a multi-stage pre-compression compensation skirt, a compression transmission plate, an anti-sound bridge spacer, and a micro-damping cavity in the elastic vibration isolation fixing node. This allows the fixing node to absorb assembly tolerances, maintain module pre-compression, weaken vibration transmission along rigid connection paths, and help reduce local narrow-frequency response near the elastic vibration isolation fixing node. This, in turn, reduces the impact of overpressure hard contact, loosening collisions, and sound bridge vibration intrusion on the acoustic quality of the door interior panel.

[0020] This invention acquires the fixed node compression state and local vibration response through a node-intrinsic compression acquisition component and a zoned vibration response acquisition component, respectively. It also utilizes the module compression consistency constraint state and the acoustic bridge vibration intrusion state to jointly modulate the state switching boundary of the underlying state machine. This enables the system to verify and locate abnormal fixed nodes, abnormal module areas, and maintenance methods, thereby reducing the scope of after-sales disassembly and inspection and troubleshooting time, and improving the reliability and maintenance efficiency of the door interior panels during long-term use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the modular sound insulation and vibration damping unit and the arrangement of fixing nodes on the back side of the door interior panel substrate according to the present invention.

[0022] Figure 2 This is a partial cross-sectional view showing the relationship between the elastic vibration isolation fixing node and the door panel layer assembly and clamping of the present invention.

[0023] Figure 3 This is a partial enlarged view of the internal structure of the elastic vibration isolation fixing node and the clamping acquisition component of the present invention.

[0024] Figure 4 This is a schematic diagram illustrating the data acquisition and control relationship of the present invention.

[0025] Figure 5 This is a two-dimensional boundary mapping diagram of the module compression consistency constraint state and the acoustic bridge vibration intrusion state of the present invention.

[0026] Figure 6This is a schematic diagram of the fixed node underlying state machine of the present invention.

[0027] Figure 7 This is a flowchart illustrating the reuse of the production, service, and after-sales processes of this invention.

[0028] Figure 8 This is a schematic diagram of the natural excitation analysis window and typical response of the present invention.

[0029] 10. Door interior sheet metal; 100. Door interior panel substrate; 110. Door lock impact zone; 120. Speaker vibration zone; 130. Armrest stress zone; 140. Lower drainage zone; 150. Peripheral sealing zone; 200. Modular sound insulation and vibration damping unit; 210. Fitting buffer layer; 220. Sound absorption damping layer; 230. Support and limiting layer; 240. Flexible sealing edge; 300. Elastic vibration isolation fixing node; 310. Clip-on connection part; 321. Dual material vibration isolation seat; 321. Rigid positioning outer ring; 322. Elastic suspension inner ring; 330. Multi-stage pre-compression compensation umbrella skirt; 331. First compensation skirt edge; 332. Second compensation skirt edge; 333. Third compensation skirt edge; 340. Compression transfer plate; 350. Sound-proof bridge spacer groove; 360. Miniature damping cavity; 361. Miniature pressure relief port; 400. Node-intrinsic compression acquisition component; 410. First segmented contact plate; 420. Second segmented contact plate; 430. Elastic spacer; 500. Zoned vibration response acquisition component; 600. Control unit. Detailed Implementation

[0030] 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.

[0031] Example 1, as Figures 1 to 3 As shown, this embodiment provides a modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels, including a door interior panel base 100, a modular sound insulation and vibration damping unit 200, an elastic vibration isolation fixing node 300, a node internal compression acquisition component 400, a zoned vibration response acquisition component 500, and a control unit 600.

[0032] The door interior panel base 100 is the main load-bearing component of the door interior panel, and several functional zones are provided on the side facing the inner sheet metal 10 of the door. The functional zones are divided according to the locations where sound insulation attenuation, vibration transmission and abnormal noise are likely to occur during the use of the door, and preferably include a door lock impact zone 110, a speaker vibration zone 120, an armrest force zone 130, a lower drainage zone 140 and a peripheral sealing zone 150.

[0033] The door lock impact zone 110 is located near the door latch or the area where the door closing force is concentrated, and is used to address the loosening of the elastic vibration isolation fixing node 300, local collisions, and rebound noises caused by the door closing impact. The speaker vibration zone 120 is located near the door speaker or speaker mounting cavity, and is used to address the door panel humming and resonance caused by low-frequency sound vibration coupling. The armrest force zone 130 is located near the door armrest, handle, or area frequently pressed by passengers, and is used to address local pressure drift caused by long-term pressing. The lower drainage zone 140 is located at the lower part of the door interior panel, and is used to address the rebound attenuation of the sound insulation and vibration damping material caused by moisture, condensation, or moisture in the door cavity. The peripheral sealing zone 150 is set along the edge of the door interior panel base 100, and is used to address edge sound leakage, edge warping, and decreased sealing continuity.

[0034] The modular sound insulation and vibration damping units 200 are respectively arranged in the corresponding functional areas; the modular sound insulation and vibration damping unit 200 is preferably a replaceable block structure, which includes a bonding buffer layer 210, a sound-absorbing damping layer 220, a support and limiting layer 230, and a flexible sealing edge 240; the bonding buffer layer 210 is arranged towards the inner sheet metal 10 of the door, and is used to adapt to the local undulations of the surface of the inner sheet metal 10 of the door, reducing hard contact. The sound-absorbing damping layer 220 is located between the bonding buffer layer 210 and the support and limiting layer 230, and is used to absorb door cavity noise and weaken the local vibration of the door interior panel substrate 100; the support and limiting layer 230 is arranged towards the door interior panel substrate 100, and is used to bear the pre-pressure transmitted by the elastic vibration isolation fixing node 300; the flexible sealing edge 240 is arranged at the edge of the modular sound insulation and vibration damping unit 200, and is used to reduce the sound leakage seam at the edge of the module and reduce the risk of local suspension and edge warping.

[0035] Modular sound insulation and vibration damping units 200 in different functional zones can have different material combinations and compression characteristics; the modular sound insulation and vibration damping unit 200 in the door lock impact zone 110 preferably uses a highly resilient bonding buffer layer 210 to withstand the impact of closing the door; the modular sound insulation and vibration damping unit 200 in the speaker vibration zone 120 preferably uses a highly damped sound-absorbing damping layer 220 to reduce low-frequency resonance; the modular sound insulation and vibration damping unit 200 in the armrest stress zone 130 preferably uses a buffer material with high resistance to permanent compression deformation to reduce the risk of collapse caused by long-term pressing; the modular sound insulation and vibration damping unit 200 in the lower drainage zone 140 preferably has a hydrophobic surface, a flow guide notch or a moisture-wicking texture to reduce long-term water vapor retention; the modular sound insulation and vibration damping unit 200 in the peripheral sealing zone 150 preferably has a continuous flexible sealing edge 240 to improve the continuity of edge compression.

[0036] The elastic vibration isolation fixing node 300 is disposed between the door interior panel base 100 and the door inner sheet metal 10. The elastic vibration isolation fixing node 300 includes a snap-fit ​​connection part 310, a dual-material vibration isolation seat 320, a multi-stage pre-compression compensation umbrella skirt 330, a compression transmission piece 340, and a sound-damping bridge spacer groove 350; the end of the snap-fit ​​connection part 310 forms a two-stage anti-detachment structure.

[0037] The snap-fit ​​connection part 310 is used to form a snap-fit ​​engagement with the snap-fit ​​hole or fixing seat on the inner sheet metal 10 of the door. The snap-fit ​​connection part 310 can be a resin snap-fit, a metal spring snap-fit, or a resin-metal composite snap-fit. The end of the snap-fit ​​connection part 310 forms a secondary anti-detachment structure, which is preferably an integrally formed barbed hook, a stepped anti-detachment flange, or an elastic recoil protrusion at the end of the snap-fit ​​connection part 310. When the main snap-fit ​​surface of the snap-fit ​​connection part 310 is worn, or when there is an axial retraction tendency due to the impact of closing the door, the secondary anti-detachment structure forms a secondary mechanical interference with the wall of the snap-fit ​​hole or the edge of the fixing seat of the inner sheet metal 10 of the door. The minimum mechanical holding force of the secondary anti-detachment structure is preferably 30N to 50N, which is used to reduce the risk of partial detachment of the door interior panel substrate 100 or detachment of the modular sound insulation and vibration damping unit 200; when the elastic vibration isolation fixing node 300 generates axial play in the holding state of the secondary anti-detachment structure, the partition vibration response acquisition component 500 can acquire the corresponding discrete impact peak after the door closing impact.

[0038] The dual-material vibration isolation seat 320 includes a rigid positioning outer ring 321 and an elastic suspension inner ring 322. The rigid positioning outer ring 321 is preferably made of polypropylene, polyamide, or glass fiber reinforced polypropylene to ensure the installation positioning and structural strength of the elastic vibration isolation fixing node 300. The elastic suspension inner ring 322 is preferably made of thermoplastic elastomer, thermoplastic polyurethane, or rubber elastic material. The elastic suspension inner ring 322 is arranged around the snap-fit ​​connection part 310 and is located between the snap-fit ​​connection part 310 and the door interior panel base 100 to block the rigid vibration transmission from the snap-fit ​​connection part 310 to the door interior panel base 100. The rigid positioning outer ring 321 and the elastic suspension inner ring 322 can be formed into an integral structure by two-color injection molding, overmolding injection molding, insert injection molding, or interference fit.

[0039] The multi-stage pre-compression compensation skirt 330 is disposed on the side of the dual-material vibration isolation base 320 facing the modular sound insulation and vibration reduction unit 200. The multi-stage pre-compression compensation skirt 330 includes a first compensation skirt edge 331, a second compensation skirt edge 332, and a third compensation skirt edge 333 arranged sequentially along the axial direction of the snap-fit ​​connection portion 310. The first compensation skirt edge 331, the second compensation skirt edge 332, and the third compensation skirt edge 333 have different elastic deformation initiation forces and radial expansion dimensions, enabling the elastic vibration isolation fixing node 300 to form graded compression compensation under different assembly gaps.

[0040] Preferably, the first compensation skirt 331 is used to absorb small assembly gap fluctuations, the second compensation skirt 332 is used to form a main clamping retainer, and the third compensation skirt 333 is used to limit overpressure and provide an overpressure identification reference. The first compensation skirt 331, the second compensation skirt 332, and the third compensation skirt 333 can be configured with different stiffnesses by progressively thinning, progressively increasing the outer diameter, or progressively changing the bending radius. As a preferred embodiment, the thickness of the first compensation skirt 331 can be 0.6 mm to 1.2 mm, the thickness of the second compensation skirt 332 can be 0.8 mm to 1.5 mm, and the thickness of the third compensation skirt 333 can be 1.2 mm to 2.0 mm. The above dimensions are only preferred ranges and can be adjusted according to the door panel gap, tolerances, and the compression characteristics of the module material.

[0041] The compression transfer plate 340 is disposed on the side of the multi-stage pre-compression compensation skirt 330 facing the modular sound insulation and vibration damping unit 200, and is used to diffuse and transfer the assembly force at the elastic vibration isolation fixing node 300 to the support limiting layer 230 of the modular sound insulation and vibration damping unit 200. The compression transfer plate 340 preferably has an arc-shaped transition edge to reduce local cutting into the modular sound insulation and vibration damping unit 200. The compression transfer plate 340 can be integrally formed with the third compensation skirt edge 333, or it can be embedded as an independent gasket between the multi-stage pre-compression compensation skirt 330 and the modular sound insulation and vibration damping unit 200.

[0042] The anti-sound bridge gap groove 350 is disposed at the isolation position of the elastic vibration isolation fixing node 300. The isolation position includes at least one of the positions between the snap-fit ​​connection part 310 and the compression transmission piece 340, and the position within the dual-material vibration isolation seat 320. Preferably, the position within the dual-material vibration isolation seat 320 is the position between the rigid positioning outer ring 321 and the elastic suspension inner ring 322. The anti-sound bridge gap groove 350 is used to form a gap between the rigid connection path and the pressure path of the modular sound insulation and vibration damping unit 200, so that the vibration of the snap-fit ​​connection part 310 is not directly transmitted to the door interior panel substrate 100. The anti-sound bridge gap groove 350 can be an annular groove, an arc-shaped discontinuous groove, or a multi-segment radial partition groove. Preferably, the anti-sound bridge gap groove 350 and the elastic suspension inner ring 322 together form a flexible broken bridge path.

[0043] A micro-damping cavity 360 is formed between adjacent compensation skirts. Preferably, the micro-damping cavity 360 includes a first micro-damping cavity 360 disposed between the first compensation skirt 331 and the second compensation skirt 332, and a second micro-damping cavity 360 disposed between the second compensation skirt 332 and the third compensation skirt 333. At least one of the micro-damping cavities 360 communicates with the back cavity of the door interior panel substrate 100 through a micro-pressure relief port 361. The micro-damping cavity 360 is used to weaken the narrow-frequency local vibration response near the elastic vibration isolation fixing node 300, and together with the elastic suspension inner ring 322, reduces the sound bridge transmission from the rigid connection path where the snap-fit ​​connection part 310 is located to the door interior panel substrate 100.

[0044] The miniature pressure relief port 361 is preferably opened towards the non-water-accumulating direction on the back side of the door interior panel substrate 100, and can be provided with a dustproof and hydrophobic membrane, a labyrinth-type air duct, or a downward-facing water-avoiding opening to reduce blockage caused by dust, adhesive residue, water film, or condensation. Even if the miniature pressure relief port 361 partially fails, the dual-material vibration isolation seat 320 and the multi-stage preload compensation umbrella skirt 330 can still maintain the basic vibration isolation and preload compensation functions.

[0045] The initial geometric design of the micro-damping cavity 360 can refer to the following preferred model: ; ; Where: f represents the target resonant sound absorption frequency of the micro-damping cavity at 360°; This represents the air velocity at the temperature condition where the micro-damped cavity 360 is located; π represents pi; G represents the equivalent opening area of ​​the micro pressure relief port 361; L represents the equivalent depth of the micro pressure relief port 361; V represents the equivalent cavity volume of the micro damping cavity 360; T represents the air temperature near the micro damping cavity 360, in degrees Celsius. and This is the temperature correction constant for the speed of sound in air.

[0046] In practical automotive door interior engineering applications, the equivalent opening area G of the miniature pressure relief port 361 is preferably... to The equivalent depth L of the miniature pressure relief port 361 is preferably 0.5 mm to 3.0 mm, and the equivalent cavity volume V of the miniature damping cavity 360 is preferably... to For modular sound insulation and vibration damping units 200 with different material combinations for the bonding buffer layer 210, sound-absorbing damping layer 220, and support limiting layer 230, the control unit 600 can call the corresponding initial vibration reference record from the production end to correct the target resonant sound absorption frequency of the micro-damping cavity 360. When the ambient temperature is below 0℃ or above 60℃, the control unit 600 will shift or expand the reference reference frequency band when judging the sound bridge vibration intrusion state B; preferably, for every 10℃ deviation of the ambient temperature from the standard room temperature, the center frequency of the reference reference frequency band will shift by 2% to 5%, and this shift is only used to adjust the verification window and the reference frequency band, and will not trigger the abnormal fixed node positioning state independently.

[0047] In practical design, the aforementioned model is used to determine the initial geometric range of the micro-damping cavity 360 and the micro-pressure relief port 361. Due to material damping, boundary leakage, and assembly tolerances on the back side of the door interior panel substrate 100, the control unit 600 can correct the target frequency band at the production end using initial vibration reference records. Preferably, the target resonant absorption frequency of the micro-damping cavity 360 can be set in the range of 80Hz to 300Hz to cover the main local response frequency bands after low-frequency excitation of the door speaker and the impact of closing the door. When the door interior cavity is in a state of low temperature, high temperature exposure, or rapid temperature change, the control unit 600 does not solely rely on the theoretical frequency of the micro-damping cavity 360 as the basis for anomaly judgment. Instead, the control unit 600 combines the initial vibration reference records from the production end with the current normalized vibration peak ratio to correct the sound bridge vibration intrusion state.

[0048] The node-inherent compression acquisition component 400 is disposed at the compression acquisition position of the elastic vibration isolation fixed node 300. The compression acquisition position includes at least one of the deformation path of the multi-stage pre-compression compensation umbrella skirt 330 and the position between the compression transfer piece 340 and the third compensation skirt edge 333. The node-inherent compression acquisition component 400 is used to acquire the compression level of the multi-stage pre-compression compensation umbrella skirt 330, the bending state of the compression transfer piece 340, or the radial deformation state of the elastic suspension inner ring 322. The control unit 600 determines the compression interval at the corresponding elastic vibration isolation fixed node 300 according to the compression level, bending state, or radial deformation state, and uses it to generate the module compression consistency constraint state.

[0049] In a low-cost implementation, the node-inherent compression acquisition component 400 includes a first segmented contact piece 410, a second segmented contact piece 420, and an elastic spacer 430. The first segmented contact piece 410 is disposed on a second compensation skirt 332 or a third compensation skirt 333, the second segmented contact piece 420 is disposed on a compression transfer piece 340 or a pre-compression limiting position, and the elastic spacer 430 is disposed between the first segmented contact piece 410 and the second segmented contact piece 420. When only the first compensation skirt 331 is effectively compressed, the first segmented contact piece 410 and the second segmented contact piece 420 form an under-compression contact state. When both the first compensation skirt 331 and the second compensation skirt 332 are effectively compressed, the first segmented contact piece 410 and the second segmented contact piece 420 form an effectively compressed contact state. When the third compensation skirt 333 is over-compressed, the first segmented contact piece 410 and the second segmented contact piece 420 form an over-compression contact state. The control unit 600 determines the clamping range of the corresponding elastic vibration isolation fixing node 300 based on the under-pressure contact state, effective clamping contact state, or over-pressure contact state.

[0050] In the low-cost embodiment, the first segmented contact piece 410 and the second segmented contact piece 420 are preferably made of phosphor bronze, beryllium copper alloy, or gold-plated copper alloy. The elastic spacer 430 is preferably made of an insulating elastic material to maintain electrical isolation between the first segmented contact piece 410 and the second segmented contact piece 420 when the corresponding compression level is not reached. The control unit 600 determines the contact state by detecting the continuity, resistance change, or high / low level change between the first segmented contact piece 410 and the second segmented contact piece 420. The signal output terminals of the first segmented contact piece 410 and the second segmented contact piece 420 can be connected to the control unit 600 via flexible conductive lines, flat wire harnesses, or embedded conductive terminals disposed on the back side of the door interior panel substrate 100.

[0051] In another embodiment, the node-intrinsic compression acquisition component 400 can be a piezoresistive sheet, a thin-film pressure sheet, a piezoelectric deformation sheet, or a capacitive deformation acquisition device. Its position remains at the compression acquisition location, used to acquire the compression levels of the multi-stage pre-compression compensation umbrella skirt 330, the bending amount of the compression transfer sheet 340, or the radial deformation amount of the elastic suspension inner ring 322.

[0052] The partitioned vibration response acquisition component 500 is disposed in at least two functional partitions of the door interior panel substrate 100, and is used to acquire the vibration response of the door interior panel substrate 100; the vibration response of the door interior panel substrate 100 includes the local vibration response of each functional partition. Preferably, the partitioned vibration response acquisition component 500 includes a door lock area vibration acquisition component and a speaker area vibration acquisition component. The door lock area vibration acquisition component is disposed in the door lock impact area 110, and is used to acquire the local vibration peak value, decay time and discrete collision waveform after the door closing impact. The speaker area vibration acquisition component is disposed in the speaker vibration area 120, and is used to acquire the low-frequency local vibration response when the speaker is working normally. Further, the partitioned vibration response acquisition component 500 may also include an armrest area vibration acquisition component, a lower vibration acquisition component and a peripheral vibration acquisition component.

[0053] In a further embodiment, the elastic vibration isolation fixing node 300 may further include a low-power boundary release component. The low-power boundary release component is disposed on the limiting side of the rigid positioning outer ring 321, the elastic suspension inner ring 322, or the multi-stage pre-compression compensation umbrella skirt 330. Its output end corresponds to the pressing transmission piece 340, the third compensation skirt edge 333, or the pre-compression limiting position. It is used to assist in releasing localized jamming of the multi-stage pre-compression compensation umbrella skirt 330 when the control unit 600 outputs a short-term action signal, or to temporarily adjust the re-compression limiting position of the corresponding elastic vibration isolation fixing node 300. After the low-power boundary release component stops operating, the corresponding elastic vibration isolation fixing node 300 returns to its original limiting state. When the low-power boundary release component is de-energized, it remains mechanically locked and does not change the basic mechanical fixing relationship formed by the snap-fit ​​connection 310, the dual-material vibration isolation seat 320, and the multi-stage pre-compression compensation umbrella skirt 330.

[0054] The low-power boundary release component is preferably a miniature electromagnetic release plate, a piezoelectric micro-displacement component, or a shape memory alloy micro-release component, and its peak power in a single action preferably does not exceed 5W. The short-time action signal is preferably a pulse drive signal of 0.1s to 0.5s, used to assist in releasing local jamming under flexible compression or acoustic bridge isolation verification conditions. The low-power boundary release component does not serve as a normal load-bearing component of the elastic vibration isolation fixed node 300, and does not continuously change the overall stiffness of the elastic vibration isolation fixed node 300 after stopping its action.

[0055] The control unit 600 is electrically or signal-connected to the node-internal compression acquisition component 400 and the zone vibration response acquisition component 500. The control unit 600 is used to acquire the compression state of each elastic vibration isolation fixing node 300 and the vibration response of the door interior panel substrate 100, and to determine the local vibration response of each functional zone based on the vibration response of the door interior panel substrate 100; the control unit 600 generates the module compression consistency constraint state and the sound bridge vibration intrusion state within a preset analysis window.

[0056] The assembly process of this embodiment is as follows. First, the modular sound insulation and vibration damping unit 200 is installed on the back side of the door interior panel base 100 according to functional partitions, with the bonding buffer layer 210 facing the inner sheet metal 10 of the door and the support limiting layer 230 facing the door interior panel base 100. Then, the elastic vibration damping fixing node 300 is installed at the corresponding fixing position of the door interior panel base 100, so that the pressing transmission piece 340 contacts the support limiting layer 230 of the modular sound insulation and vibration damping unit 200. Subsequently, the door interior panel base 100 is pushed onto the inner sheet metal 10 of the door, so that the snap-fit ​​connection part 310 snaps into the snap-fit ​​hole or fixing seat on the inner sheet metal 10 of the door. After snapping, the multi-level pre-compression compensation umbrella skirt 330 generates corresponding levels of elastic compression according to the assembly gap, the elastic suspension inner ring 322 forms a flexible vibration damping transition, and the node internal compression acquisition component 400 synchronously generates an under-pressure contact state, an effective compression contact state, or an over-pressure contact state. Finally, the control unit 600 records the initial clamping state after assembly and acquires the initial vibration response under natural excitation conditions.

[0057] Example 2, as Figures 4 to 6 As shown, the control logic of this embodiment is based on the compression state and the acoustic bridge vibration intrusion state of the elastic vibration isolation fixed node 300. The state switching boundary of the underlying state machine is modulated by the module compression consistency constraint state and the acoustic bridge vibration intrusion state, so that the underlying state machine outputs abnormal fixed node location information or maintenance prompt information.

[0058] like Figure 8 As shown, the control unit 600 acquires the compression state of each elastic vibration isolation fixing node 300 and the local vibration response of each functional zone within a preset analysis window. The preset analysis window can be triggered by a door closing impact, normal low-frequency playback from a speaker, road noise during low-speed vehicle travel, or a light tapping verification action at the maintenance end. The control unit 600 preferably first determines whether the natural excitation meets the valid verification conditions; only when the valid verification conditions are met will the current analysis window be used to update the sound bridge vibration intrusion state.

[0059] The preferred effective verification conditions for door closing impact are: the vibration acquisition device in the door lock area detects the main impact peak within 50ms after triggering, and the main impact peak is within 0.6 to 1.8 times the benchmark main impact peak at the production end. The preferred effective verification conditions for loudspeaker low frequency are: there is a low-frequency component of 80Hz to 250Hz lasting for more than 0.5s within the loudspeaker vibration zone 120. The preferred effective verification conditions for road noise are: the vehicle speed is between 10km / h and 50km / h, the door is closed, the window position is stable, and no sudden acceleration or braking signals are detected. Only when the analysis window meets the effective verification conditions will the control unit 600 update the acoustic bridge vibration intrusion status.

[0060] The door closing impact analysis window is preferably 0.1s to 1.5s after the door closing action is triggered; the speaker vibration analysis window is preferably 0.5s to 3s during which the low-frequency components of the speaker are continuously present; and the road noise analysis window is preferably 2s to 10s during which the vehicle is traveling at low speed and the door is closed.

[0061] To characterize the compression state of the modular sound insulation and vibration damping unit 200 at each elastic vibration isolation fixing node 300, the control unit 600 preferably uses the module compression ratio as the basic quantity: ; Where: R represents the module compression ratio corresponding to the elastic vibration isolation fixed node 300; H represents the effective free thickness of the modular sound insulation and vibration damping unit 200 before assembly at the corresponding position of the elastic vibration isolation fixing node 300; H represents the effective support distance between the door interior panel base 100 and the inner sheet metal 10 of the door at the corresponding position after assembly of the elastic vibration isolation fixing node 300.

[0062] The thickness can be calibrated during the production of the modular sound insulation and vibration damping unit 200, or it can be retrieved by the assembly equipment after reading the module model and calling the corresponding thickness parameters. H can be indirectly calculated from the node-internal compression acquisition component 400. For example, it can be determined based on the deformation level of the multi-level pre-compression compensation umbrella skirt 330, the radial deformation of the elastic suspension inner ring 322, the bending amount of the compression transmission plate 340, or the contact state of the segmented contact plates.

[0063] When the node-inherent compression acquisition component 400 uses segmented contact plates, the control unit 600 does not need to directly calculate the continuous H. Instead, it maps the under-pressure contact state, effective compression contact state, and over-pressure contact state to the corresponding compression intervals through a calibration table from the production end. When the node-inherent compression acquisition component 400 uses a piezoresistive plate, thin-film pressure plate, piezoelectric deformation plate, or capacitive deformation acquisition component, the control unit 600 converts H or R according to the calibration curve. In this way, both low-cost segmented contact schemes and continuous acquisition schemes can support compression state judgment.

[0064] The control unit 600 divides R into an undervoltage zone, an effective compression zone, an overvoltage check zone, and an overvoltage risk zone. Preferably, The current voltage is in the undervoltage zone; This is the effective compression zone; This is the overpressure verification area; This is the overpressure risk zone. For modular sound insulation and vibration damping units 200 made of different materials, the above range can be calibrated and adjusted according to the foam rebound characteristics, damping layer thickness, and door assembly tolerances.

[0065] To characterize the compressibility of the same modular sound insulation and vibration damping unit 200 across multiple elastic vibration isolation fixing nodes 300, the control unit 600 preferably employs a module compression discrete amount: ; Where: D represents the module compression discrete amount corresponding to the modular sound insulation and vibration damping unit 200; This indicates the maximum value of R corresponding to each elastic vibration isolation fixed node 300 within the coverage area of ​​the same modular sound insulation and vibration damping unit 200; This represents the minimum value of R corresponding to each elastic vibration isolation fixed node 300 within the coverage area of ​​the same modular sound insulation and vibration damping unit 200.

[0066] D is used to determine whether there is pressure imbalance, local suspension, or local overvoltage within the same module. Preferably, At that time, it was determined that the module's clamping consistency was good; At that time, it was determined that the module required a tight review; If the module is found to have a significant risk of inconsistent compression, it is determined that the module has this risk. The preset discrete threshold is preferably 0.15, but it can also be calibrated and adjusted according to the material compression characteristics of the modular sound insulation and vibration damping unit 200 and the door assembly tolerance.

[0067] The control unit 600 generates a module compression consistency constraint state Q based on the continuity of the compression intervals between the intervals R and D, adjacent elastic vibration isolation fixed nodes 300, and the migration direction of the compression intervals within multiple analysis windows. The module compression consistency constraint state Q is preferably generated using interval affiliation, topological continuity, and state migration methods, and includes one of the following: effective compression state, under-pressure constraint enhancement state, drift constraint enhancement state, bias constraint enhancement state, and edge suspension risk state.

[0068] When R falls into the effective compression zone and D is less than or equal to the preset discrete threshold, the control unit 600 determines Q as the effective compression state. When R corresponding to two or more consecutive elastic vibration isolation fixing nodes 300 within the same modular sound insulation and vibration damping unit 200 falls into the undervoltage zone, the control unit 600 determines Q as the undervoltage constraint enhancement state. When R corresponding to the same elastic vibration isolation fixing node 300 migrates from the effective compression zone to the undervoltage zone within three consecutive analysis windows, the control unit 600 determines Q as the drift constraint enhancement state. When both overvoltage risk zone and undervoltage zone exist within the same module, or when D is greater than the preset discrete threshold, the control unit 600 determines Q as the pressure deviation constraint enhancement state. When the elastic vibration isolation fixing node 300 at the edge of the module falls into the undervoltage zone, and D corresponding to the adjacent elastic vibration isolation fixing node 300 enters the compression verification range, the control unit 600 determines Q as the edge suspension risk state.

[0069] The above-mentioned Q generation process involves the multi-level pre-compression compensation umbrella skirt 330, the compression transfer plate 340, and the node-inherent compression acquisition component 400 all participating in the compression side judgment; the multi-level pre-compression compensation umbrella skirt 330 provides the graded compression basis, the compression transfer plate 340 provides the force diffusion and bending acquisition position, the node-inherent compression acquisition component 400 provides the compression level or deformation signal, and R and D convert the above structural state into a verifiable compression side state.

[0070] To characterize the vibration intrusion state of the acoustic bridge, the control unit 600 preferably adopts a normalized vibration response relative to the reference model: ; Where: E represents the normalized peak vibration ratio of the functional zone; A represents the local peak vibration collected in the current analysis window of the functional zone; S represents the excitation intensity characterization value in the current analysis window; This indicates the peak value of the baseline vibration in the initial baseline record of the functional area at the production end; This represents the excitation intensity characterization value when establishing the initial baseline record.

[0071] S can be selected from the main impact peak of the door, the low-frequency input amplitude of the speaker, the reference vibration peak of the vehicle body, or the input amplitude of the light tap verification at the repair end. Through this normalization process, the current vibration response is comparable to the initial reference vibration response, which can reduce misjudgments caused by differences in the strength of natural excitation.

[0072] The control unit 600 generates a sound bridge vibration intrusion state B based on E, vibration decay time, phase deviation state, number of discrete impact peaks, and local response changes within the target frequency band corresponding to the micro-damping cavity 360. The sound bridge vibration intrusion state B includes one of the following: normal vibration isolation zone, insufficient flexible attenuation zone, hard contact sound bridge zone, and loose collision zone.

[0073] when When the vibration decay time does not exceed 1.2 times the reference decay time, the control unit 600 will determine corresponding B as the normal vibration isolation zone. When the vibration decay time is 1.2 to 1.6 times the reference decay time, the control unit 600 determines B as the insufficient flexible decay zone. Furthermore, the phase deviation between the vibratory isolation fixing node 300 and the door interior panel substrate 100 is less than [the required value]. When the door closes, the control unit 600 identifies B as the hard contact acoustic bridge region. When two or more discrete impact peaks appear within 0.3s to 0.8s after the door closes, and the discrete impact peaks are concentrated in the neighborhood of the same elastic vibration isolation fixed node 300, the control unit 600 identifies B as the loosening collision region.

[0074] When the local response peak value of the micro-damping cavity 360 within the target frequency band continuously increases relative to the initial reference, and the vibration decay time near the elastic vibration isolation fixing node 300 is synchronously extended, the control unit 600 increases the priority of the corresponding elastic vibration isolation fixing node 300 entering the flexible attenuation insufficient region or hard contact acoustic bridge region. When the anti-acoustic bridge spacer 350 is closed by overpressure, or the rigid connection path bypasses the elastic suspension inner ring 322 to form continuous contact, the control unit 600, in conjunction with E and phase deviation state, prioritizes the neighborhood of the corresponding elastic vibration isolation fixing node 300 as the hard contact acoustic bridge region. When the end secondary anti-detachment structure of the snap-fit ​​connection part 310 maintains the minimum mechanical holding force, and the corresponding elastic vibration isolation fixing node 300 exhibits a discrete impact peak after the door closing impact, the control unit 600 prioritizes the neighborhood of the elastic vibration isolation fixing node 300 as the loosening collision region.

[0075] The aforementioned generation process of B involves the elastic suspension inner ring 322, the anti-sound bridge spacer 350, the micro damping cavity 360, the end secondary anti-detachment structure of the snap-fit ​​connection 310, and the zoned vibration response acquisition component 500 all participating in the vibration side judgment. The elastic suspension inner ring 322 is used to form a flexible vibration isolation path, the anti-sound bridge spacer 350 is used to block hard contact sound bridges, the micro damping cavity 360 is used to weaken the narrow frequency response within the target frequency band, the end secondary anti-detachment structure of the snap-fit ​​connection 310 is used to form detectable secondary mechanical interference when slightly loose, and the zoned vibration response acquisition component 500 provides E, decay time, phase deviation state, and number of discrete impact peaks.

[0076] To further improve the temperature adaptability of B, the control unit 600 can correct the target frequency band of the micro-damping cavity 360 according to the temperature information of the door area; the temperature-corrected air velocity is used to determine the actual response frequency band of the micro-damping cavity 360. The correction result is only used to adjust the reference frequency band and verification window of the sound bridge vibration intrusion state, and does not trigger the abnormal fixed node positioning state separately.

[0077] The temperature information in the door area can come from the vehicle ambient temperature signal, door cavity temperature acquisition device, or production-end calibration temperature record. The preferred correction boundaries for ambient temperature include a 0°C low-temperature boundary and a 60°C high-temperature boundary, and the preferred correction boundary for ambient humidity is 80%RH. When the ambient temperature is below 0°C, the elastic material of the modular sound insulation and vibration damping unit 200 hardens, and the control unit 600 lowers the lower threshold of the effective compression zone by 5% to 10%, and extends the verification window of the compression verification state. When the ambient temperature is above 40°C and the ambient humidity is above 80%RH, and this lasts for more than 24 hours, the control unit 600 increases the verification frequency of the corresponding elastic vibration isolation fixing node 300 entering the compression verification state to 1.5 to 2 times that of the standard state. The above temperature and humidity corrections are only used to adjust the verification window, verification frequency, and threshold boundaries, and are not used alone as the basis for outputting abnormal fixing node positioning information.

[0078] To pinpoint specific elastic vibration isolation fixing nodes 300 to identify regional vibration anomalies, the control unit 600 pre-establishes neighborhood associations between functional zones and elastic vibration isolation fixing nodes 300. Each functional zone is associated with at least two adjacent elastic vibration isolation fixing nodes 300. When a functional zone enters a hard-contact acoustic bridge zone or a loosening collision zone, the control unit 600 determines the priority of the abnormal fixing node by combining the Q values ​​of adjacent elastic vibration isolation fixing nodes 300 within that functional zone. Elastic vibration isolation fixing nodes 300 with higher priority are those exhibiting the highest degree of compression anomaly, the most significant compression state migration, the closest proximity to the discrete impact peak, or located at the edge of the abnormal functional zone, or showing the most significant increase in the target frequency band response of the corresponding micro-damping cavity 360.

[0079] Subsequently, the control unit 600 maps the module compression consistency constraint state Q and the acoustic bridge vibration intrusion state B to a two-dimensional boundary field, obtaining the fixed-node state machine boundary parameter set: ; Where: P represents the boundary parameter set of the fixed node state machine; M represents the preset two-dimensional boundary mapping relationship; Q represents the module compression consistency constraint state corresponding to the elastic vibration isolation fixed node 300; and B represents the acoustic bridge vibration intrusion state corresponding to the elastic vibration isolation fixed node 300.

[0080] The fixed node state machine boundary parameter set includes at least the compression verification entry boundary, the flexible compression allowable boundary, the acoustic bridge isolation verification entry boundary, the abnormal fixed node locking boundary, the verification window length, the state hysteresis boundary, the maintenance prompt delay boundary, and the compression displacement upper limit. In the preferred mapping relationship, when Q is in an effective compression state and B is in the normal vibration isolation zone, the control unit 600 maintains the effective compression holding state.

[0081] When B is in the loosening collision zone, the control unit 600 prioritizes tightening the abnormal fixed node locking boundary and shortens the maintenance reminder delay boundary; if Q is in the undervoltage constraint enhancement state, drift constraint enhancement state, or edge suspension risk state at this time, the abnormal positioning priority of the corresponding elastic vibration isolation fixed node 300 is increased.

[0082] When B is in the hard contact acoustic bridge area, the control unit 600 prioritizes tightening the acoustic bridge isolation verification entry boundary and reduces the flexible pressure allowable boundary; if at this time the R of the corresponding elastic vibration isolation fixed node 300 is in the overpressure verification area or overpressure risk area, or Q is in the pressure deviation constraint enhancement state, the bottom state machine prioritizes entering the acoustic bridge isolation verification state.

[0083] When B is in the insufficient flexible attenuation zone, the control unit 600 extends the vibration verification window; if Q is in the effective compression state, the bottom state machine first enters the sound bridge isolation verification state; if Q is in the undervoltage constraint enhancement state, drift constraint enhancement state, bias constraint enhancement state, or edge suspension risk state, the control unit 600 simultaneously tightens the compression verification to the boundary and increases the verification frequency of the corresponding elastic vibration isolation fixed node 300.

[0084] When B is in the normal vibration isolation zone and Q is in the undervoltage constraint enhancement state, drift constraint enhancement state, bias constraint enhancement state, or edge suspension risk state, the control unit 600 tightens the verification entry boundary, causing the underlying state machine to enter the verification state. Among them, when Q is in the drift constraint enhancement state, the control unit 600 extends the maintenance prompt delay boundary to reduce false alarms. When Q is in the edge suspension risk state, the control unit 600 increases the verification frequency of the corresponding module edge elastic vibration isolation fixed node 300.

[0085] The underlying state machine includes at least the following states: effective compression holding state, compression verification state, flexible compression state, acoustic bridge isolation verification state, abnormal fixed node positioning state, and maintenance prompt state.

[0086] Under effective compression and holding conditions, the control unit 600 maintains the current state of the elastic vibration isolation fixed node 300 and records the trends of R, D, E, Q, and B. Under compression verification conditions, the control unit 600 increases the sampling frequency of the corresponding elastic vibration isolation fixed node 300 or the corresponding functional zone, preferably verifying whether the compression state remains abnormal within 2 to 5 consecutive analysis windows. Under flexible compression conditions, the assembly or maintenance end can perform local compression on the corresponding elastic vibration isolation fixed node 300 according to the compression displacement upper limit and holding time boundary output by the control unit 600. Preferably, the compression displacement upper limit is 3% to 8% of the free thickness of the modular sound insulation and vibration damping unit 200, and the holding time is 1 to 5 seconds. Under sound bridge isolation verification conditions, the control unit 600 verifies whether the elastic suspension inner ring 322 is compressed to the point of losing vibration isolation gap, whether the anti-sound bridge spacer groove 350 is compressed and closed, whether the multi-level pre-compression compensation umbrella skirt 330 is in an over-compression level, and whether the door interior panel substrate 100 has local hard contact. When the abnormal fixed node is located, the control unit 600 outputs the abnormal fixed node, abnormal module area, and abnormal type. When the maintenance prompt is displayed, the control unit 600 outputs a prompt suggesting repressurization, replacement of the elastic vibration isolation fixed node 300, replacement of the modular sound insulation and vibration damping unit 200, or checking the corresponding functional area.

[0087] The preferred conditions for entering the effective compression holding state are that Q is in the effective compression state and B is in the normal vibration isolation zone. The preferred conditions for entering the compression verification state are that Q is in the under-pressure constraint enhancement state, drift constraint enhancement state, pressure deviation constraint enhancement state, or edge suspension risk state, and B has not yet entered the loosening collision zone. The preferred conditions for entering the flexible re-compression state are that Q is continuously abnormal for two to five consecutive analysis windows, and B has not entered the hard contact acoustic bridge zone. The preferred conditions for entering the acoustic bridge isolation verification state are that B enters the hard contact acoustic bridge zone, or R of the corresponding elastic vibration isolation fixed node 300 is in the over-pressure verification zone or over-pressure risk zone and B is in the flexible attenuation insufficient zone, or Q is in the pressure deviation constraint enhancement state and B is in the flexible attenuation insufficient zone. The preferred conditions for entering the abnormal fixed node positioning state are that Q abnormality and B abnormality occur consecutively in the neighborhood of the same elastic vibration isolation fixed node 300. The preferred conditions for entering the maintenance prompt state are that the abnormal fixed node positioning state continues to reach a preset number of times, or that it has not returned to the effective compression holding state after re-compression.

[0088] In the implementation of the low-power boundary release component, when the underlying state machine enters the flexible re-pressure state or the acoustic bridge isolation verification state, and Q is in the drift constraint enhancement state, pressure bias constraint enhancement state, or edge suspension risk state, the control unit 600 outputs a short-term action signal to the low-power boundary release component to assist in releasing the local jamming of the multi-level pre-pressure compensation umbrella skirt 330, or adjusting the re-pressure limit position of the corresponding elastic vibration isolation fixed node 300. After the action is completed, the node intrinsic compression acquisition component 400 acquires the compression state of the corresponding elastic vibration isolation fixed node 300 again, and the control unit 600 updates Q according to the verified R and D. The low-power boundary release component is only used to assist in the verification, re-pressure, and acoustic bridge isolation verification process.

[0089] In embodiments without a low-power boundary release mechanism, the flexible repressurization state is used to output the repressurization position, the upper limit of the repressurization displacement, and the holding time boundary. The repressurization action is performed by a repressurization fixture at the assembly end, a dedicated pressing tool at the maintenance end, or a manually assisted fixture. After repressurization is completed, the control unit 600 again collects R, D, and E, and updates Q, B, and P.

[0090] Among them, the multi-stage pre-compression compensation umbrella skirt 330, the compression transfer plate 340 and the node endogenous compression acquisition component 400 together form the data source for R and D; the elastic suspension inner ring 322, the sound-proof bridge spacer 350, the micro damping cavity 360, the secondary anti-detachment structure and the zoned vibration response acquisition component 500 together form the data source for E, vibration decay time, phase deviation state and number of discrete impact peaks.

[0091] Through the above control logic, R represents the compression degree of a single elastic vibration isolation fixing node 300, D represents the compression consistency among multiple elastic vibration isolation fixing nodes 300 within the same module, and E represents the normalized vibration response of the functional partition. Q is jointly determined by R, D, and the compression state transition relationship, B is jointly determined by E, vibration decay time, phase deviation state, number of discrete impact peaks, and the target frequency band response of the micro-damping cavity 360, and P is obtained by mapping Q and B. The final output of the underlying state machine is generated by the state switching modulated by P, thereby connecting the structural state of the elastic vibration isolation fixing node 300, the compression state of the modular sound insulation and vibration damping unit 200, and the sound bridge vibration intrusion state into a closed-loop control relationship.

[0092] Example 3, as Figure 7 As shown, this embodiment further illustrates the application of the present invention at the production end, vehicle service end, and after-sales end, based on Embodiment 1 and Embodiment 2.

[0093] In production mode, after the door interior panel substrate 100 and the door inner sheet metal 10 are assembled, the control unit 600 enters the initial reference establishment process. The initial reference establishment process includes initial clamping reference recording and initial vibration reference recording.

[0094] The initial clamping reference record is used to record the initial clamping state of each elastic vibration isolation fixing node 300. If the node-inherent clamping acquisition component 400 uses a first segmented contact piece 410, a second segmented contact piece 420, and an elastic spacer 430, the control unit 600 records the under-pressure contact state, the effective clamping contact state, the over-pressure contact state, and the contact stabilization time of the corresponding elastic vibration isolation fixing node 300. If the node-inherent clamping acquisition component 400 uses a piezoresistive sheet, a thin film pressure sheet, a piezoelectric deformation sheet, or a capacitive deformation acquisition component, the control unit 600 records the R and D values ​​corresponding to each elastic vibration isolation fixing node 300 after assembly. The initial clamping reference record is preferably stored in association with the batch number of the door interior panel assembly, the model of the modular sound insulation and vibration damping unit 200, the model of the elastic vibration isolation fixing node 300, the assembly station number, and the assembly time.

[0095] The initial vibration reference record is used to record the reference vibration response of the door lock impact zone 110, the speaker vibration zone 120, and other functional areas under preset natural excitation conditions. At the production end, standard door closing impact, a short low-frequency band from the speaker, or a light tapping action at the assembly station can be used as the reference excitation. The control unit 600 records the corresponding... , Reference decay time and reference discrete impact peak number. If the production line does not have a standard acoustic environment, an initial compression reference record can be established first, and an initial vibration reference record can be established during the vehicle off-line inspection or the first inspection after sales.

[0096] In the vehicle service mode, the control unit 600 uses natural excitations during actual vehicle use for state verification. These natural excitations include door closing impacts, normal speaker playback, and low-speed passage over rough surfaces. The control unit 600 only updates the acoustic bridge vibration intrusion state of the corresponding functional zone when the natural excitations meet the valid verification conditions. This setting reduces false alarms and avoids misidentifying abnormal road conditions, short-term external noise, or atypical user actions as abnormalities in the elastic vibration isolation fixed node 300.

[0097] In after-sales mode, maintenance personnel can communicate with the control unit 600 via a diagnostic terminal to read abnormal fixed nodes, abnormal module areas, and suggested handling methods. The control unit 600 can output the anomaly location results by functional zone. For example, a certain elastic vibration isolation fixed node 300 in the door lock impact zone 110 may be at risk of loosening and collision; a certain elastic vibration isolation fixed node 300 in the speaker vibration zone 120 may be at risk of hard contact acoustic bridge; and the peripheral sealing zone 150 may be at risk of edge underpressure. Based on this, maintenance personnel only need to disassemble and inspect the corresponding area, reducing the need for blind disassembly of the entire door trim panel.

[0098] In the after-sales mode, the diagnostic terminal can also trigger the tap verification action of the maintenance terminal. The control unit 600 uses the tap input amplitude as the excitation intensity characterization value and updates the acoustic bridge vibration intrusion status of the corresponding functional area.

[0099] The control unit 600 can output three types of maintenance suggestions. The first type is a verification suggestion, corresponding to minor drift or single anomalies, prompting maintenance personnel to perform a door-closed verification, a low-frequency playback verification, or a gentle tapping verification. The second type is a re-compression suggestion, corresponding to situations where the module compression consistency constraint is abnormal and the acoustic bridge vibration intrusion is in the normal vibration isolation zone or the insufficient flexible attenuation zone, prompting the user to perform local re-compression on the corresponding elastic vibration isolation fixing node 300 according to the upper limit of the re-compression displacement. The third type is a replacement suggestion, corresponding to situations where multiple consecutive analysis windows enter the loosening collision zone or the hard contact acoustic bridge zone, prompting the user to replace the elastic vibration isolation fixing node 300 or the modular sound insulation and vibration damping unit 200.

[0100] This embodiment also provides a fault fallback method. When the node-internal compression acquisition component 400 outputs an open circuit, short circuit, or long-term fixed signal, the control unit 600 does not directly output a failure conclusion for the elastic vibration isolation fixed node 300. Instead, the control unit 600 marks the corresponding elastic vibration isolation fixed node 300 as having insufficient acquisition reliability and increases the vibration verification priority of adjacent functional zones. When the zone vibration response acquisition component 500 outputs abnormal saturation or no response, the control unit 600 retains the compression state judgment and restricts the underlying state machine to the compression verification state or maintenance prompt state to avoid entering the flexible compression state when vibration data is missing.

[0101] This embodiment can also be configured with temperature and humidity correction logic. Since the modular sound insulation and vibration damping unit 200 may use foam, fiber felt, or composite damping materials, its rebound performance will deviate with changes in temperature and humidity. The control unit 600 can read the temperature and humidity information of the door area and call the preset material compensation table to adjust the temperature and humidity. Alternatively, the effective compression zone boundary may be corrected; preferably, when the ambient temperature is below zero degrees Celsius or above sixty degrees Celsius, the control unit 600 extends the verification window of the compression verification state; when the humidity of the lower drainage zone 140 is continuously higher than the preset humidity threshold, the control unit 600 increases the verification frequency of the elastic vibration isolation fixing node 300 in the lower drainage zone 140; the temperature and humidity correction is only used to adjust the verification window length, maintenance prompt delay boundary and edge tolerance of the effective compression zone, and does not trigger the abnormal fixing node positioning state on its own.

[0102] By reusing the technology at the production, service, and after-sales stages, this invention can establish a traceable baseline after the assembly of the door interior panel assembly, identify clamping drift and acoustic bridge vibration intrusion during vehicle use, and quickly locate abnormal fixed nodes or abnormal module areas during after-sales maintenance. This implementation can employ either a low-cost segmented contact plate solution or a piezoresistive plate, piezoelectric deformable plate, or micro-accelerometer solution, making it suitable for different vehicle configurations and cost targets.

[0103] It should be noted that, for the sake of brevity, the foregoing method embodiments are described as a series of actions, but this does not mean that the application limits the order of the steps. Based on the ideas of this application, some steps can be executed in different orders or in parallel without affecting the functional implementation. Secondly, those skilled in the art should also understand that the specific embodiments described in the specification are preferred embodiments of the technical solutions of this application, and not limitations on the scope of protection of this application. All equivalent improvements or substitutions made within the spirit and principles of this application should be covered within the scope of protection of this application.

[0104] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular soundproofing and shock absorbing assembly and fixing structure for an automotive door inner panel, characterized in that, This includes the door interior panel substrate, modular sound insulation and vibration damping unit, elastic vibration isolation fixing node, node internal compression acquisition component, zoned vibration response acquisition component, and control unit; The modular sound insulation and vibration damping unit is located on the side of the door interior panel substrate facing the inner sheet metal of the door; The elastic vibration isolation fixing node connects the door interior panel base to the inner sheet metal of the door, and forms a pre-compression fit for the modular sound insulation and vibration damping unit; The control unit is connected to the node-inherent compression acquisition component and the partition vibration response acquisition component respectively. The node-inherent compression acquisition component is used to acquire the compression state at the elastic vibration isolation fixing node, and the partition vibration response acquisition component is used to acquire the vibration response of the door interior panel substrate. Within a preset analysis window, the control unit generates a module compression consistency constraint state based on the compression state, generates a sound bridge vibration intrusion state based on the vibration response, and maps the module compression consistency constraint state and the sound bridge vibration intrusion state to a two-dimensional boundary field to obtain a fixed node state machine boundary parameter set, which is used to modulate the state switching boundary of the underlying state machine used to output abnormal fixed node location information or maintenance prompt information.

2. The modular soundproofing and shock absorbing assembly and fixing structure for an automobile door inner panel according to claim 1, characterized in that, The door interior panel substrate is provided with functional zones on the side facing the inner sheet metal of the door. The functional zones include at least one of the following: door lock impact zone, speaker vibration zone, armrest stress zone, lower drainage zone, and peripheral sealing zone; the modular sound insulation and vibration damping unit is provided in the corresponding functional zone.

3. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 2, characterized in that, The modular sound insulation and vibration damping unit includes a bonding buffer layer, a sound-absorbing damping layer, a support and limiting layer, and a flexible sealing edge; the bonding buffer layer is disposed facing the inner sheet metal of the door, the support and limiting layer is disposed facing the interior panel substrate of the door, the sound-absorbing damping layer is located between the bonding buffer layer and the support and limiting layer, and the flexible sealing edge is disposed at the edge of the modular sound insulation and vibration damping unit.

4. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 1, characterized in that, The elastic vibration isolation fixing node includes a snap-fit ​​connection part, a dual-material vibration isolation seat, a multi-stage pre-compression compensation umbrella skirt, a compression transmission plate, and a sound-bridge anti-sound gap groove. The snap-fit ​​connection part snaps into the inner sheet metal of the door. The dual-material vibration isolation seat is disposed between the snap-fit ​​connection part and the door interior panel substrate. The multi-stage pre-compression compensation umbrella skirt is disposed on the side of the dual-material vibration isolation seat facing the modular sound insulation and vibration damping unit. The compression transmission plate is disposed between the multi-stage pre-compression compensation umbrella skirt and the modular sound insulation and vibration damping unit. The sound-bridge anti-sound gap groove is disposed at the isolation position of the elastic vibration isolation fixing node. The isolation position includes at least one of the positions between the snap-fit ​​connection part and the compression transmission plate, and the position within the dual-material vibration isolation seat.

5. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 4, characterized in that, The dual-material vibration isolation seat includes a rigid positioning outer ring and an elastic suspension inner ring; the rigid positioning outer ring cooperates with the door interior panel substrate, and the elastic suspension inner ring is arranged around the snap-fit ​​connection part and is located between the snap-fit ​​connection part and the door interior panel substrate.

6. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 4, characterized in that, The multi-stage pre-compression compensation umbrella skirt includes a first compensation skirt edge, a second compensation skirt edge, and a third compensation skirt edge arranged sequentially along the axial direction of the buckle connection part; a micro damping cavity is formed between adjacent compensation skirt edges, and the micro damping cavity is connected to the back cavity of the door interior panel substrate through a micro pressure relief port.

7. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 6, characterized in that, The node-inherent compression acquisition component is disposed at the compression acquisition position of the elastic vibration isolation fixed node. The compression acquisition position includes at least one of the deformation path of the multi-stage pre-compression compensation umbrella skirt and the position between the compression transfer piece and the third compensation skirt edge. The node-inherent compression acquisition component includes a first segmented contact piece, a second segmented contact piece, and an elastic spacer. The control unit determines the compression range of the corresponding elastic vibration isolation fixed node according to the contact state between the first segmented contact piece and the second segmented contact piece.

8. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 2, characterized in that, The zoned vibration response acquisition component includes a door lock zone vibration acquisition element and a speaker zone vibration acquisition element; the door lock zone vibration acquisition element is located in the door lock impact zone, and the speaker zone vibration acquisition element is located in the speaker vibration zone.

9. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 1, characterized in that, The control unit determines the compression range of a single elastic vibration isolation fixed node based on the module compression ratio, determines the compression consistency among multiple elastic vibration isolation fixed nodes within the same modular sound insulation and vibration reduction unit based on the module compression discrete amount, and generates the module compression consistency constraint state by combining the continuity of the compression range between adjacent elastic vibration isolation fixed nodes and the migration direction of the compression range within multiple analysis windows.

10. The modular sound insulation and vibration damping assembly and fixing structure for automotive door interior panels according to claim 1, characterized in that, The control unit generates the acoustic bridge vibration intrusion state based on the normalized peak vibration ratio, vibration decay time, phase deviation state, and number of discrete impact peaks. The underlying state machine includes an effective compression holding state, a compression verification state, a flexible compression state, an acoustic bridge isolation verification state, an abnormal fixed node positioning state, and a maintenance reminder state. The fixed node state machine boundary parameter set is used to modulate the entry boundary, exit boundary, verification window, and hysteresis boundary of the underlying state machine between the effective compression holding state, the compression verification state, the flexible compression state, the acoustic bridge isolation verification state, the abnormal fixed node positioning state, and the maintenance reminder state.

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