A device for detecting the strength of an interior trim panel

Abstract

The application relates to the technical field of material strength detection, in particular to a kind of detection car interior plate strength detection device, including base, the base is fixedly connected with support, support is fixedly connected with control cabinet, still include: with the mobile joint structure of base connection, mobile joint structure includes push mechanism and buckle seat;With the composite pressure detection structure of base connection, composite pressure detection structure includes horizontal shift mechanism, horizontal shift mechanism is connected with static pressure distance measuring mechanism, the sound image double positioning mechanism is arranged below static pressure distance measuring mechanism, the sound image double positioning mechanism is connected with horizontal shift mechanism.The application is realized through mobile joint structure and composite pressure detection structure mutual cooperation, synchronous realization of the quick joint positioning and conveying of the detection panel, visual positioning and acoustic damage detection cooperate the pressure and displacement data output by static pressure distance measuring mechanism, effectively realize multidimensional detection, significantly improve the accuracy and comprehensiveness of car interior plate strength detection.

Description

Technical Field

[0001] This invention relates to the field of material strength testing technology, specifically a device for testing the strength of automotive interior panels. Background Technology

[0002] As a core component of automotive interiors, interior trim panels often have different structures depending on their location. Their structural strength directly affects the safety and durability of the vehicle interior. Therefore, sampling strength testing is necessary during the production process to select products that meet strength requirements. The core principle of compressive strength testing is to apply a continuously increasing uniaxial compressive load to the sample until it fractures, yields, or reaches a specified deformation. The maximum destructive load during this process is recorded, and then divided by the original bearing area of ​​the sample to calculate the material's compressive strength.

[0003] Existing automotive interior trim panels are often installed using clips, but testing devices use clamps to fix the panels, which often requires manual adjustment of the panel clamping position, resulting in low testing efficiency. Most existing automotive interior trim panel strength testing devices only obtain pressure and displacement data through static pressure to determine strength, and cannot capture the micro-damage signals that initially occur inside the trim panel during the pressure process. The degree of damage is not accurately judged, the testing dimension is single, and it is difficult to fully reflect the actual strength performance of the trim panel. Summary of the Invention

[0004] The purpose of this invention is to provide a device for testing the strength of automotive interior panels, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for testing the strength of automotive interior panels includes a base, a bracket fixedly connected to the base, and a control console fixedly connected to the bracket. It also includes:

[0007] A movable snap-fit ​​structure connected to a base, the movable snap-fit ​​structure including a push mechanism mounted on the base, the push mechanism being movably connected to a buckle, the buckle being used to snap-fit ​​a decorative panel for receiving and detecting.

[0008] A composite pressure detection structure connected to a base includes a lateral movement mechanism connected to the base, a static pressure ranging mechanism connected to the lateral movement mechanism, and an acoustic-image dual positioning mechanism located below the static pressure ranging mechanism. The acoustic-image dual positioning mechanism is connected to the lateral movement mechanism and is located below the buckle. The lateral movement mechanism is used to synchronously adjust the positions of the static pressure ranging mechanism and the acoustic-image dual positioning mechanism. The acoustic-image dual positioning mechanism is communicatively connected to a control console. Based on the principles of acoustic recognition positioning and machine vision recognition, the acoustic-image dual positioning mechanism performs multi-source sensing detection on the trim panel to be tested. By receiving the sound wave signals, image information, displacement, and pressure data jointly fed back by the acoustic-image dual positioning mechanism and the static pressure ranging mechanism through the control console, the control console can perform multi-dimensional analysis and judgment of the strength of the trim panel to be tested.

[0009] As a further improvement of the present invention: the pushing mechanism includes two sets of first active telescopic frames fixedly connected to the base, the moving ends of the two sets of first active telescopic frames are fixedly connected to a set of moving platforms, the moving platforms are slidably connected to the base, the middle of the moving platform is provided with a through groove adapted to the buckle, the acoustic-image dual positioning mechanism is provided below the through groove, and the upper end face of the moving platform is movably connected to the buckle.

[0010] As a further improvement of the present invention: the fastener includes a base plate movably connected to the moving platform, the upper end of the base plate is provided with multiple sets of snap-fit ​​grooves, the base plate is fixedly connected with multiple sets of support plates, and the support plates are movably connected to the moving platform through multiple sets of threaded parts.

[0011] As a further improvement of the present invention: the transverse mechanism includes a second active telescopic frame fixedly connected to the base, the moving end of the second active telescopic frame is fixedly connected to a linkage frame slidably connected to the base, the linkage frame is connected to a static pressure ranging mechanism, and the linkage frame is connected to an acoustic-image dual positioning mechanism.

[0012] As a further improvement of the present invention: the static pressure measuring mechanism includes a hydraulic cylinder fixedly connected to the linkage frame, the linkage frame is connected to a linear displacement sensor, the moving end of the linear displacement sensor is fixedly connected to a fixing plate, the fixing plate is fixedly connected to the piston rod of the hydraulic cylinder, the piston rod of the hydraulic cylinder is fixedly connected to a first pressure sensor, the first pressure sensor is communicatively connected to the control console, and the first pressure sensor is quickly connected to a pressure head through a first quick-release assembly, the pressure head being positioned above the acoustic-image dual positioning mechanism.

[0013] As a further improvement of the present invention: the acoustic-image dual positioning mechanism includes a triangular base slidably connected to the base, the triangular base being fixedly connected to the linkage frame, a three-degree-of-freedom precision displacement stage being installed in the middle of the triangular base, an industrial camera being installed on the table surface of the three-degree-of-freedom precision displacement stage, the industrial camera being communicatively connected to the control console, a ring-shaped shadowless LED light source being installed at the lens end of the industrial camera, three sets of electric telescopic rods being fixedly connected to the triangular base, the three sets of electric telescopic rods being distributed in an equilateral triangle on the triangular base, a second pressure sensor being fixedly connected to the moving end of the electric telescopic rod, the second pressure sensor being communicatively connected to the control console, the second pressure sensor being quickly connected to a connector via a second quick-release assembly, the second quick-release assembly having the same structure as the first quick-release assembly, an acoustic emission sensor being fixedly installed inside the connector, the acoustic emission sensor and the industrial camera being both located below the pressure head, the acoustic emission sensor being movably connected to a wiring connection, the wiring connection being communicatively connected to the control console.

[0014] As a further improvement of the present invention: both the first quick-release assembly and the second quick-release assembly include a first connector and a second connector, the first connector and the second connector are threadedly connected to each other, the first connector of the first quick-release assembly is fixedly connected to the first pressure sensor, the second connector of the first quick-release assembly is fixedly connected to the pressure head, the first connector of the second quick-release assembly is fixedly connected to the second pressure sensor, and the second connector of the second quick-release assembly is fixedly connected to the connector.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] During normal use, the trim panel to be inspected is first secured to the mounting bracket. A pushing mechanism moves the bracket and trim panel to a preset inspection position. Then, a lateral movement mechanism simultaneously moves the static pressure ranging mechanism and the acoustic-image dual positioning mechanism to the inspection area. The acoustic-image dual positioning mechanism first completes the positioning and correction of the trim panel's inspection position. It then collects image information from the inspection area and transmits it to the control panel for visual positioning. Simultaneously, the acoustic-image dual positioning mechanism contacts the bottom surface of the trim panel, receiving damage sound wave signals generated inside the trim panel during subsequent pressure application and transmitting them to the control panel to assist in determining the location and extent of damage during the inspection. After positioning is complete, the static pressure ranging mechanism... The static pressure ranging mechanism extends and abuts the upper surface of the trim panel to be tested. Then, the static pressure ranging mechanism applies a preset pressure to the trim panel. The static pressure ranging mechanism collects the current pressure value and feeds it back to the control console. The static pressure ranging mechanism records the displacement under pressure in real time. Combined with the pressure data, the deformation of the trim panel under that pressure can be obtained, thereby judging the strength performance of the trim panel. When microcracks or structural damage occur inside the trim panel during the pressure process, the acoustic-visual dual positioning mechanism will collect the corresponding sound wave signal. The control console combines the sound wave signal, deformation, and pressure data to complete a multi-dimensional comprehensive judgment of the strength of the trim panel, effectively improving the accuracy and reliability of the test results. This invention achieves rapid snap-fit ​​positioning and transport of the trim panel under test by combining a movable snap-fit ​​structure with a composite pressure detection structure. At the same time, it combines an acoustic and image dual positioning mechanism to simultaneously complete visual positioning and acoustic damage detection. Combined with the pressure and displacement data output by the static pressure ranging mechanism, it effectively achieves multi-dimensional detection. Compared with single pressure ranging detection, it can effectively identify hidden damage inside the trim panel, significantly improving the accuracy and comprehensiveness of the strength detection of automotive interior trim panels. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the composite pressure detection structure of the present invention.

[0020] Figure 4 This is a three-dimensional structural schematic diagram of the composite pressure detection structure of the present invention from another perspective.

[0021] Figure 5 For the present invention Figure 4 A magnified view of a portion of point A in the middle.

[0022] Figure 6 This is a three-dimensional structural diagram of the acoustic-image dual positioning mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram of the internal three-dimensional structure of the first quick-release component of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the movable snap-fit ​​structure of the present invention.

[0025] In the diagram: 1. Base; 2. Bracket; 3. Control console; 4. Movable snap-fit ​​structure; 5. Pushing mechanism; 6. Buckle; 7. Composite pressure detection structure; 8. Lateral movement mechanism; 9. Static pressure ranging mechanism; 10. Acoustic-image dual positioning mechanism; 11. First active telescopic frame; 12. Moving platform; 13. Through slot; 14. Seat plate; 15. Snap-fit ​​slot; 16. Support plate; 17. Threaded component; 18. Second active telescopic frame; 19. Linkage frame; 20. Hydraulic cylinder; 1. Linear displacement sensor; 22. Fixing plate; 23. First pressure sensor; 24. First quick-release assembly; 25. Pressure head; 26. Triangular base; 27. Three-degree-of-freedom precision displacement stage; 28. Industrial camera; 29. ​​Ring-shaped shadowless LED light source; 30. Electric telescopic rod; 31. Second pressure sensor; 32. Second quick-release assembly; 33. Connector; 34. Acoustic emission sensor; 35. Wiring; 36. First connector; 37. Second connector. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0027] Example 1, see Figures 1 to 8 As shown, a device for testing the strength of automotive interior panels includes a base 1, a bracket 2 fixedly connected to the base 1, a control console 3 fixedly connected to the bracket 2, and a trained crack recognition model built into the control console 3. The device also includes:

[0028] A movable snap-fit ​​structure 4 is connected to the base 1. The movable snap-fit ​​structure 4 includes a push mechanism 5 installed on the base 1. The push mechanism 5 is movably connected to a buckle 6. The buckle 6 is used to snap-fit ​​the decorative panel for inspection.

[0029] A composite pressure detection structure 7 is connected to the base 1. The composite pressure detection structure 7 includes a transverse mechanism 8 connected to the base 1. The transverse mechanism 8 is connected to a static pressure ranging mechanism 9. An acoustic-image dual positioning mechanism 10 is arranged below the static pressure ranging mechanism 9. The acoustic-image dual positioning mechanism 10 is connected to the transverse mechanism 8 and is located below the buckle 6. The transverse mechanism 8 is used to synchronously adjust the positions of the static pressure ranging mechanism 9 and the acoustic-image dual positioning mechanism 10. The acoustic-image dual positioning mechanism 10 is communicatively connected to the control console 3. The acoustic-image dual positioning mechanism 10 performs multi-source sensing detection on the trim panel to be tested based on the principles of acoustic recognition positioning and machine vision recognition. By receiving the sound wave signals, image information, displacement and pressure data jointly fed back by the acoustic-image dual positioning mechanism 10 and the static pressure ranging mechanism 9 through the control console 3, the control console 3 can perform multi-dimensional analysis and judgment on the strength of the trim panel to be tested.

[0030] During normal use, the trim panel to be inspected is first secured to the buckle 6. The pushing mechanism 5 moves the buckle 6 and the trim panel to the preset inspection position. Then, the lateral movement mechanism 8 simultaneously moves the static pressure ranging mechanism 9 and the acoustic-image dual positioning mechanism 10 to the inspection area. The acoustic-image dual positioning mechanism 10 first completes the positioning and correction of the trim panel's inspection position. The acoustic-image dual positioning mechanism 10 collects image information of the inspection area and transmits it to the control console 3 to complete visual positioning. At the same time, the acoustic-image dual positioning mechanism 10 contacts the bottom surface of the trim panel and receives the damage sound wave signal generated inside the trim panel during subsequent pressure application. This signal is then transmitted to the control console 3 to assist in judging the location and degree of damage to the trim panel during the inspection process. After completion, the static pressure measuring mechanism 9 extends and abuts against the upper surface of the trim panel to be tested. Then, the static pressure measuring mechanism 9 applies a preset pressure to the trim panel. The static pressure measuring mechanism 9 collects the current pressure value and feeds it back to the control console 3. The static pressure measuring mechanism 9 records the displacement under pressure in real time. Combined with the pressure data, the deformation of the trim panel under that pressure can be obtained, thereby judging the strength performance of the trim panel. When microcracks or structural damage occur inside the trim panel during the pressure process, the acoustic-image dual positioning mechanism 10 will collect the corresponding sound wave signal. The control console 3 combines the sound wave signal, deformation, and pressure data to complete a multi-dimensional comprehensive judgment of the strength of the trim panel, effectively improving the accuracy and reliability of the test results. This invention achieves rapid snap-fit ​​positioning and transport of the trim panel to be inspected by cooperating with the movable snap-fit ​​structure 4 and the composite pressure detection structure 7. At the same time, the dual acoustic and visual positioning mechanism 10 can simultaneously complete visual positioning and acoustic damage detection. Combined with the pressure and displacement data output by the static pressure ranging mechanism 9, it can effectively achieve multi-dimensional detection. Compared with single pressure ranging detection, it can effectively identify hidden damage inside the trim panel, significantly improving the accuracy and comprehensiveness of the strength detection of the vehicle interior trim panel.

[0031] In one embodiment, the pushing mechanism 5 includes two sets of first active telescopic frames 11 fixedly connected to the base 1. The moving ends of the two sets of first active telescopic frames 11 are jointly fixedly connected to a moving stage 12. The moving stage 12 is slidably connected to the base 1. A through groove 13 adapted to the buckle 6 is provided in the middle of the moving stage 12. The acoustic-image dual positioning mechanism 10 is located below the through groove 13. The upper surface of the moving stage 12 is movably connected to the buckle 6. The two sets of first active telescopic frames 11 extend and retract synchronously, causing the moving stage 12 to slide along the surface of the base 1, thereby moving the buckle 6 and the fixed decorative panel to complete the positional movement. This facilitates the insertion and removal of the decorative panel from the detection area. The through groove 13 provides space for the acoustic-image dual positioning mechanism 10, ensuring that the acoustic-image dual positioning mechanism 10 can smoothly pass through the moving stage 12 and contact the bottom surface of the decorative panel to complete the detection.

[0032] In one embodiment, the fastener 6 includes a base plate 14 movably connected to the moving platform 12. The base plate 14 has multiple sets of snap-fit ​​grooves 15 on its upper end. Multiple sets of support plates 16 are fixedly connected to the base plate 14. The support plates 16 are movably connected to the moving platform 12 via multiple sets of threaded components 17, which can be screws or bolts. Loosening the threaded components 17 allows the base plate 14 and support plates 16 to be removed from the moving platform 12. By replacing different base plates 14 and using different sizes of snap-fit ​​grooves 15, the fastener 6 can be adapted to snap-fit ​​decorative panels of different sizes, achieving compatible snap-fit ​​fixing of decorative panels of different specifications. This facilitates quick replacement of the fastener 6 with the corresponding snap-fit ​​groove 15 size according to the specifications of the decorative panel to be tested, effectively improving the adaptability of this device.

[0033] In one embodiment, the lateral movement mechanism 8 includes a second active telescopic frame 18 fixedly connected to the base 1. The active telescopic direction of the second active telescopic frame 18 is perpendicular to the active telescopic direction of the first active telescopic frame 11. The moving end of the second active telescopic frame 18 is fixedly connected to a linkage frame 19 slidably connected to the base 1. The linkage frame 19 is connected to the static pressure measuring mechanism 9 and the acoustic-image dual positioning mechanism 10. The active telescopic frame 18's active telescopic operation drives the linkage frame 19 to slide along the base 1, thereby simultaneously driving the static pressure measuring mechanism 9 and the acoustic-image dual positioning mechanism 10 to complete lateral position adjustment, achieving position adjustment for different detection areas of the decorative panel and meeting the detection requirements of different detection points.

[0034] In one embodiment, the static pressure ranging mechanism 9 includes a hydraulic cylinder 20 fixedly connected to a linkage frame 19. The linkage frame 19 is connected to a linear displacement sensor 21. The moving end of the linear displacement sensor 21 is fixedly connected to a fixing plate 22. The fixing plate 22 is fixedly connected to the piston rod of the hydraulic cylinder 20. The piston rod of the hydraulic cylinder 20 is fixedly connected to a first pressure sensor 23. The first pressure sensor 23 is communicatively connected to the control console 3. The first pressure sensor 23 is quickly connected to a pressure head 25 via a first quick-release assembly 24. The pressure head 25 is positioned above the acoustic-image dual positioning mechanism 10. The piston rod of the hydraulic cylinder 20 drives the first pressure sensor 23 to move downward. The first pressure sensor 23 drives the pressure head 25 to press down on the trim panel through the first quick-release assembly 24. After the pressure head 25 contacts the trim panel, it continuously applies pressure. The first pressure sensor 23 collects the current pressure value in real time and transmits it to the control console 3. At the same time, the piston rod of the hydraulic cylinder 20 drives the fixed plate 22 to move during the movement. The fixed plate 22 drives the moving end of the linear displacement sensor 21 to move. The linear displacement sensor 21 records the displacement of the piston rod of the hydraulic cylinder 20 in real time. With the pressure data measured by the first pressure sensor 23, the control console 3 can obtain the deformation of the trim panel under the corresponding pressure, and thus complete the basic judgment of strength. The first quick-release assembly 24 can quickly complete the disassembly and replacement of the pressure head 25, so as to replace the pressure head 25 with different contact areas and shapes to meet different pressure testing requirements.

[0035] In one embodiment, the dual acoustic-image positioning mechanism 10 includes a triangular base 26 slidably connected to the base 1. The triangular base 26 is fixedly connected to the linkage frame 19. A three-degree-of-freedom precision displacement stage 27 is installed in the middle of the triangular base 26. The table surface of the three-degree-of-freedom precision displacement stage 27 can realize three degrees of freedom of movement and adjustment. The three-degree-of-freedom precision displacement stage 27 is conventional technology in the art and will not be described in detail here. An industrial camera 28 is installed on the table surface of the three-degree-of-freedom precision displacement stage 27. The industrial camera 28 is communicatively connected to the control console 3. A ring-shaped shadowless LED light source 29 is installed at the lens end of the industrial camera 28. The triangular base 26 is fixedly connected to... Three sets of electric telescopic rods 30 are arranged in an equilateral triangle on the triangular base 26. The moving end of each electric telescopic rod 30 is fixedly connected to a second pressure sensor 31, which is communicatively connected to the control console 3. The second pressure sensor 31 is quickly connected to a connector 33 via a second quick-release assembly 32. The second quick-release assembly 32 has the same structure as the first quick-release assembly 24. An acoustic emission sensor 34 is fixedly installed inside the connector 33. The acoustic emission sensor 34 and the industrial camera 28 are both located below the pressure head 25. The acoustic emission sensor 34 is movably connected to a wiring 35, which is communicatively connected to the control console 3.Before the test begins, coupling agent is applied to the contact surface between the acoustic emission sensor 34 and the trim panel. Then, the three-degree-of-freedom precision displacement stage 27 moves the industrial camera 28. With uniform illumination provided by the ring-shaped shadowless LED light source 29, the industrial camera 28 acquires images of the detection area on the bottom of the trim panel and transmits the acquired image information to the control console 3. Visual positioning correction is then completed, and after confirming that the detection point is aligned with the pressure head 25, the three sets of electric telescopic rods 30 extend synchronously. The electric telescopic rods 30 move the second pressure sensor 31, which in turn moves the acoustic emission sensor 34 upwards via the connector 33 until the acoustic emission sensor 34 is fully engaged. The acoustic emission sensor 34 abuts against the bottom surface of the trim panel. The second pressure sensor 31 collects the contact pressure between the acoustic emission sensor 34 and the trim panel in real time and transmits the pressure data to the control console 3. This ensures that all three sets of acoustic emission sensors 34 maintain a stable and appropriate contact state with the trim panel. The pressure value can be selected between 1N and 3N to avoid excessive support of the trim panel by the acoustic emission sensor 34, and to prevent insufficient or excessive contact pressure of the acoustic emission sensor 34 from affecting the accuracy of the sound wave signal acquisition. During subsequent pressure detection, as the static pressure ranging mechanism 9 applies pressure, the electric telescopic rod 30 synchronously extends and retracts, allowing the acoustic emission sensor to maintain a stable contact state with the trim panel. The pressure on the trim panel is maintained at a customized level. When calculating the pressure-displacement curve, the control console 2 removes the influence of the pressure applied by the acoustic emission sensor 34 to avoid distortion of the pressure-displacement curve. When microcracks or structural deformation damage occur inside the trim panel, sound waves are released. The three sets of acoustic emission sensors 34 synchronously collect the corresponding sound wave signals and transmit the signals to the control console 3 via wiring 35. The control console 3 combines the time difference of the signals received by the three sets of acoustic emission sensors 34 to accurately locate the specific location of the internal damage. When the force-displacement curve calculated by the control console 3 shows the first indistinct inflection point, if the acoustic emission energy at this time... If the count rate and amplitude both exceed the preset threshold, it is determined to be an early failure point of internal cracking of the matrix. This point is recorded as the acoustic failure intensity, which is earlier and more accurate than the force value drop point. The control console 3 uses a trained crack recognition model to segment the crack pixels in the image captured by the industrial camera 28 in real time. When the crack length or area growth rate exceeds the set value, it is interlocked with the force value signal recorded in the control console 3 to automatically record the visual failure intensity. At the same time, the second quick-release component 32 can quickly complete the disassembly and replacement of the connector 33 and the acoustic emission sensor 34, which is convenient for maintenance and replacement of damaged acoustic emission sensor 34 and ensures detection accuracy.

[0036] Example 2, based on Example 1, see [link / reference] Figure 5 , Figure 6 , Figure 7The first quick-release assembly 24 and the second quick-release assembly 32 both include a first connector 36 and a second connector 37. The first connector 36 and the second connector 37 are threaded together. The first connector 36 of the first quick-release assembly 24 is fixedly connected to the first pressure sensor 23. The second connector 37 of the first quick-release assembly 24 is fixedly connected to the pressure head 25. The first connector 36 of the second quick-release assembly 32 is fixedly connected to the second pressure sensor 31. The second connector 37 of the second quick-release assembly 32 is fixedly connected to the connector 33. When the pressure head 25 needs to be replaced, simply screw on the pressure head 25 to unscrew the second connector 37 from the first connector 36 to complete the disassembly. Then, align the second connector 37 of the new pressure head 25 with the first connector 36 and screw it on to complete the installation quickly. When the acoustic emission sensor 34 and the connector 33 need to be replaced, the operation is the same. Disconnect the wiring 35 from the acoustic emission sensor 34, and then directly screw on the connector 33 to unscrew the second connector 37 from the first connector 36 to complete the removal. After replacement, screw the new second connector 37 onto the first connector 36 to fix it. The disassembly and assembly operations are simple and convenient, and the parts can be quickly replaced without the use of special auxiliary tools, which effectively improves the efficiency of maintenance and replacement.

[0037] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A device for testing the strength of automotive interior panels, comprising a base, a bracket fixedly connected to the base, and a control console fixedly connected to the bracket, characterized in that, Also includes: A movable snap-fit ​​structure connected to a base, the movable snap-fit ​​structure including a push mechanism mounted on the base, the push mechanism being movably connected to a buckle, the buckle being used to snap-fit ​​a decorative panel for receiving and detecting. A composite pressure detection structure connected to a base includes a lateral movement mechanism connected to the base, a static pressure ranging mechanism connected to the lateral movement mechanism, and an acoustic-image dual positioning mechanism located below the static pressure ranging mechanism. The acoustic-image dual positioning mechanism is connected to the lateral movement mechanism and is located below the buckle. The lateral movement mechanism is used to synchronously adjust the positions of the static pressure ranging mechanism and the acoustic-image dual positioning mechanism. The acoustic-image dual positioning mechanism is communicatively connected to a control console. Based on the principles of acoustic recognition positioning and machine vision recognition, the acoustic-image dual positioning mechanism performs multi-source sensing detection on the trim panel to be tested. By receiving the sound wave signals, image information, displacement, and pressure data jointly fed back by the acoustic-image dual positioning mechanism and the static pressure ranging mechanism through the control console, the control console can perform multi-dimensional analysis and judgment of the strength of the trim panel to be tested.

2. The device for testing the strength of automotive interior panels according to claim 1, characterized in that, The pushing mechanism includes two sets of first active telescopic frames fixedly connected to the base. The moving ends of the two sets of first active telescopic frames are fixedly connected to a set of moving platforms. The moving platforms are slidably connected to the base. The middle of the moving platform is provided with a through groove that matches the buckle. The acoustic-image dual positioning mechanism is located below the through groove. The upper surface of the moving platform is movably connected to the buckle.

3. The device for testing the strength of automotive interior panels according to claim 2, characterized in that, The fastener includes a base plate that is movably connected to the moving platform. The upper end of the base plate has multiple sets of snap-fit ​​grooves. The base plate is fixedly connected to multiple sets of support plates. The support plates are movably connected to the moving platform through multiple sets of threaded parts.

4. The device for testing the strength of automotive interior panels according to claim 1, characterized in that, The lateral movement mechanism includes a second active telescopic frame fixedly connected to the base. The moving end of the second active telescopic frame is fixedly connected to a linkage frame slidably connected to the base. The linkage frame is connected to a static pressure ranging mechanism and a dual acoustic-image positioning mechanism.

5. The device for testing the strength of automotive interior panels according to claim 4, characterized in that, The static pressure ranging mechanism includes a hydraulic cylinder fixedly connected to a linkage frame. A linear displacement sensor is connected to the linkage frame. A fixed plate is fixedly connected to the moving end of the linear displacement sensor. The fixed plate is fixedly connected to the piston rod of the hydraulic cylinder. A first pressure sensor is fixedly connected to the piston rod of the hydraulic cylinder. The first pressure sensor is communicatively connected to the control console. The first pressure sensor is quickly connected to a pressure head via a first quick-release assembly. The pressure head is positioned above the acoustic-image dual positioning mechanism.

6. The device for testing the strength of automotive interior panels according to claim 5, characterized in that, The acoustic-image dual positioning mechanism includes a triangular base slidably connected to the base, a triangular base fixedly connected to the linkage frame, a three-degree-of-freedom precision displacement stage mounted in the middle of the triangular base, an industrial camera mounted on the table surface of the three-degree-of-freedom precision displacement stage, and a communication connection between the industrial camera and the control console. A ring-shaped shadowless LED light source is mounted on the lens end of the industrial camera. Three sets of electric telescopic rods are fixedly connected to the triangular base, arranged in an equilateral triangle on the triangular base. A second pressure sensor is fixedly connected to the moving end of each electric telescopic rod, and the second pressure sensor is communication connected to the control console. The second pressure sensor is quickly connected to a connector via a second quick-release assembly, the second quick-release assembly having the same structure as the first quick-release assembly. An acoustic emission sensor is fixedly installed inside the connector. Both the acoustic emission sensor and the industrial camera are located below the pressure head. The acoustic emission sensor is movably connected to a wiring connection, which is communication connected to the control console.

7. The device for testing the strength of automotive interior panels according to claim 6, characterized in that, Both the first quick-release assembly and the second quick-release assembly include a first connector and a second connector. The first connector and the second connector are threaded together. The first connector of the first quick-release assembly is fixedly connected to the first pressure sensor. The second connector of the first quick-release assembly is fixedly connected to the pressure head. The first connector of the second quick-release assembly is fixedly connected to the second pressure sensor. The second connector of the second quick-release assembly is fixedly connected to the connector.

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