Test device for a roof

Abstract

The application relates to the technical field of simulation tests, and discloses a test device for a ceiling, which comprises a fixing support, an impact assembly and a measuring assembly. The fixing support is provided with the ceiling. The impact assembly and the measuring assembly are movably arranged on the fixing support, and are respectively arranged on two sides of the ceiling along the thickness direction of the ceiling. When the ceiling is deformed by the impact of the impact assembly, the measuring assembly is suitable for being pushed by the ceiling to measure the deformation amount of the ceiling. The test device according to the application can simulate the impact of an air curtain on the ceiling and measure the deformation amount of the ceiling.

Description

Technical Field

[0001] This application relates to the field of simulation testing technology, and in particular to a testing device for a ceiling. Background Technology

[0002] In the early stages of automotive curtain airbag module development, simulation tests are typically conducted using computer software to detect the impact of environmental factors on curtain airbag detonation. However, existing technologies model the roof structure using reference material parameters in the simulation test of the curtain airbag detonation subsystem. The physical and mechanical properties of the roof are related to the roof's manufacturing process and material structure. Constructing a roof simulation model using only material property parameters makes it difficult to build a relatively accurate test model, and the physical and mechanical properties of the roof model constructed by existing technologies are difficult to fit with the actual physical state.

[0003] Therefore, determining the amount of deformation of the ceiling when the air curtain is inflated and deployed is a technical problem that urgently needs to be solved. Utility Model Content

[0004] This application provides a testing device for ceilings, which can simulate the impact of air curtains on ceilings and measure the amount of ceiling deformation.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application provide a testing device for a ceiling, including a fixed support, an impact component, and a measuring component; the fixed support is provided with a ceiling; the impact component and the measuring component are movably disposed on the fixed support, and the impact component and the measuring component are respectively located on both sides of the ceiling along the thickness direction of the ceiling; wherein, when the ceiling is deformed by the impact component, the measuring component is adapted to be pushed by the ceiling to measure the deformation of the ceiling.

[0007] According to the test device for the roof proposed in the first aspect of this application, the fixed bracket first stabilizes and fixes the roof, providing a reliable benchmark for subsequent dynamic tests, avoiding overall displacement of the roof due to impact or deformation, and ensuring that the test process conforms to the actual installation state of the roof on the vehicle; while the impact component, by moving on one side of the roof and applying impact, can reproduce the impact process of the vehicle's air curtain inflating and expanding on the roof, realizing realistic impact simulation and real-time deformation measurement, while ensuring that the test data is both close to the real scene and has high accuracy, providing a reliable basis for optimizing the roof's impact resistance performance, helping to construct an air curtain simulation model more accurately, and improving the detection accuracy of the air curtain subsystem explosion simulation test.

[0008] Optionally, the impact assembly includes a drive unit, a mounting plate, and multiple impact hammers, all of which are mounted on the mounting plate. The mounting plate is slidably mounted on a fixed bracket, and the drive unit is mounted on the fixed bracket and is poweredly coupled to the mounting plate.

[0009] The above solution can more accurately reproduce the real impact scenario of the air curtain inflation on the ceiling. On the one hand, multiple impact hammers are integrated into the mounting plate, which can simulate the impact force on the ceiling when the air curtain inflates. Multiple impact hammers can act on the corresponding area of ​​the ceiling simultaneously, which helps to reduce the deviation between the simulation and the real scene, improve the accuracy of the simulation, and make the impact load closer to the actual working conditions. On the other hand, the mounting plate is slidably set on the fixed bracket and powered by the drive unit, which can drive multiple impact hammers to slide stably along the preset trajectory and impact the ceiling, accurately reproduce the dynamic continuous impact process of the air curtain on the ceiling from the start of inflation to full expansion, and improve the simulation accuracy of the ceiling's stress deformation response in real collisions.

[0010] Optionally, the impact assembly also includes multiple connecting rods. Along the length of the connecting rods, each connecting rod has a corresponding impact hammer on one side and a mounting plate on the other side. Each connecting rod is equipped with a piezoelectric sensor.

[0011] In the above scheme, the piezoelectric sensor is directly integrated into the connecting rod, which can accurately capture the real-time impact force at the moment of contact between the impact hammer and the ceiling. The connecting rod serves as the force transmission path between the impact hammer and the mounting plate. The sensor is located on this path, which can reduce the impact of force attenuation during transmission on the detection accuracy. It can directly reflect the actual load of the impact hammer on the ceiling, improve the measurement accuracy, and provide accurate force data support for analyzing the relationship between the force and deformation of the ceiling.

[0012] Optionally, the mounting plate is provided with multiple mounting holes, and the other side of each connecting rod passes through the corresponding mounting hole. The distance between the mounting plate and the impact hammer is adjustable along the length of the connecting rod.

[0013] In the above scheme, the distance between the mounting plate and the impact hammer is adjustable. The initial suspension distance of the impact hammer can be adjusted according to the thickness of the ceiling to ensure that it can effectively contact the ceiling and transmit the preset force during impact. The spacing can also be finely adjusted in combination with the installation position of the piezoelectric sensor, such as optimizing the distance between the sensor and the impact hammer and the mounting plate to avoid vibration interference areas and further improve the accuracy of force signal acquisition. It can also simulate the difference in impact depth on the ceiling when the air curtain is fully inflated and partially inflated, such as the pushing distance when the air curtain is fully inflated and partially inflated. Furthermore, it can simulate the impact of different inflation sequences of each cavity of the air curtain, making the impact simulation closer to the real working conditions.

[0014] Optionally, each connecting rod is rotatable relative to the mounting hole to adjust the impact angle of the corresponding impact hammer.

[0015] In the above scheme, the rotatable connecting rod can simulate the actual impact angle differences of the air curtains on the roof of different vehicle models. Due to the different installation positions and expansion directions of the vehicle air curtains, the impact on the roof is not a single vertical direction. By rotating the connecting rod to adjust the angle of the impact hammer, the working conditions of multi-angle impact can be reproduced, avoiding the deviation of the impact direction from the real scene caused by the fixed angle, and improving the accuracy of the test results.

[0016] Optionally, multiple impact hammers are arranged sequentially along the front-to-back direction of the ceiling.

[0017] In the above scheme, multiple impact hammers are arranged sequentially along the front-back direction, which can improve the consistency between the impact area and the actual effective range of the air curtain, enhance the realism of the test scenario, and at the same time, simulate the dynamic expansion process of the air curtain in the front-back direction when it is inflated. The front-back arrangement of the impact hammers can be controlled by the drive unit to achieve sequential or synchronous impacts along the front-back direction, reproduce the temporal characteristics of the air curtain expansion, and more accurately reflect the deformation transmission law of the roof along the front-back direction in actual collisions.

[0018] Optionally, the drive unit includes a motor, a drive plate, and a drive rod. The motor is mounted on a fixed bracket, and the power output end of the motor is connected to the drive plate. One side of the drive rod is mounted on a mounting plate, and the other side of the drive rod is mounted on the drive plate and spaced apart from the power output end of the motor.

[0019] In the above scheme, the drive rod and the motor power output end are spaced apart. When the motor drives the drive rod to move through the drive plate, the rotational torque of the motor can be more efficiently converted into the sliding power of the mounting plate along the fixed bracket. Especially when driving multiple impact hammers to impact synchronously, it can avoid the mounting plate from tilting or shifting due to the concentration of force points, ensuring that the mounting plate always slides at a uniform speed along the preset trajectory. This ensures that the impact speed and force of the impact hammer are uniform and stable, accurately matching the dynamic rate characteristics of the air curtain inflation and expansion, and improving the consistency of impact simulation.

[0020] Optionally, the measuring assembly includes multiple measuring rod groups, which are spaced apart along the length of the ceiling, and each measuring rod group includes multiple measuring rods spaced apart along the vertical direction.

[0021] In the above scheme, multiple sets of measuring rods spaced apart along the length of the ceiling can fully cover different areas of the ceiling. Multiple sets of measuring rods can simultaneously record the deformation of each area, improving the accuracy and comprehensiveness of the test and reducing the substitution of local data for overall deviation caused by the limitation of measurement points. At the same time, multiple measuring rods spaced apart along the vertical direction in each set of measuring rods can capture the deformation differences of the same area at different heights. The spaced measuring rods can comprehensively detect the deformation, which helps to improve the accuracy of the test.

[0022] Optionally, the fixed support includes a first support and a second support, the first support being provided with a measuring component and a canopy, and the second support being provided with an impact component.

[0023] In the above scheme, separating the second support of the impact-bearing component from the first support of the roof and the measuring component effectively blocks the vibration transmission during the impact process, reduces the impact of mechanical vibration generated by the impact component on the measuring component, ensures that the deformation data captured by the measuring component truly reflects the deformation of the roof itself, rather than the error caused by the vibration of the support, and significantly improves the measurement accuracy.

[0024] Optionally, the test apparatus also includes a deformation acquisition mechanism for acquiring the deformation of the roof measured by the measuring component.

[0025] In the above scheme, the deformation acquisition mechanism can detect the displacement of the measuring rod, and improve the acquisition accuracy and efficiency through automatic acquisition. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure in some embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the impact component in some embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the measuring component in some embodiments of this application.

[0030] [Explanation of Labels in the Attached Image]

[0031] 100. Fixed bracket; 110. First bracket; 120. Second bracket;

[0032] 200. Impact components;

[0033] 210. Drive unit; 211. Motor; 212. Drive plate; 213. Drive rod;

[0034] 220. Mounting plate; 221. Mounting holes;

[0035] 230. Impact hammer; 240. Connecting rod; 250. Piezoelectric sensor;

[0036] 300. Measuring assembly; 310. Measuring rod assembly; 311. Measuring rod;

[0037] 400. Ceiling. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0040] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0043] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0044] To keep pace with the current fast-paced development cycle, some OEMs are using computer simulation software in the early stages of developing side curtain airbag modules to detect the impact of surrounding components on the airbag during detonation. While there are relatively mature benchmarking methods for constructing airbag models in the airbag detonation subsystem simulation model, the roof simulation model is usually set based on reference material parameter tables. The special structural treatment processes of the roof often have a critical impact on the actual mechanical properties of the roof. The poor fit between the simulated state of the model set according to the material reference parameter table and the actual roof deformation state results in low detection accuracy of the entire airbag detonation subsystem simulation, and less development benefit from the simulation test.

[0045] Therefore, determining the amount of deformation of the ceiling when the air curtain is inflated and deployed is a technical problem that urgently needs to be solved.

[0046] In view of this, in order to determine the deformation of the roof 400 when the air curtain is inflated and deployed, this application proposes a test device for the roof 400. Along the thickness direction of the roof 400, the impact component 200 and the measuring component 300 are respectively located on both sides of the roof 400. When the roof 400 is deformed by the impact component 200, the measuring component 300 is adapted to be pushed by the roof 400 to measure the deformation of the roof 400. By moving on one side of the roof 400 and applying impact, the impact component 200 can recreate the impact process of the vehicle air curtain inflating and expanding on the roof 400. It can realize realistic impact simulation and real-time deformation measurement, while ensuring that the test data is both close to the real scene and has high accuracy. This provides a reliable basis for optimizing the impact resistance performance of the roof 400, helps to construct a more accurate air curtain simulation model, and improves the detection accuracy of the air curtain subsystem explosion simulation test.

[0047] The following description, with reference to the accompanying drawings, describes a test apparatus for a ceiling 400 according to an embodiment of this application.

[0048] Please refer to Figures 1-2 A test apparatus for a ceiling 400 according to a first aspect embodiment of the present application includes a fixed bracket 100, an impact assembly 200 and a measuring assembly 300.

[0049] The fixed bracket 100 is equipped with a canopy 400; it can be understood that the fixed bracket 100 can provide a stable mounting base for the canopy 400, reducing the probability of the canopy 400 shifting or shaking due to lack of fixed support. In other words, the fixed bracket 100 can firmly fix the canopy 400 in the preset test position, reducing the fluctuation of test data caused by the movement of the canopy 400.

[0050] Further simulation of the actual installation state of the roof 400 on the vehicle (such as the support stiffness after fixing) makes the test results closer to the real use scenario and improves the credibility of the test data; at the same time, the rigid structure of the fixed bracket 100 can also prevent the roof 400 from deforming along with the bracket when it is impacted, further ensuring the stability of the test process and reducing the interference of external factors on the test results.

[0051] Both the impact component 200 and the measuring component 300 are movably mounted on the fixed support 100. Along the thickness direction of the ceiling 400, the impact component 200 and the measuring component 300 are located on both sides of the ceiling 400. It can be understood that the impact component 200 can move to one side of the ceiling 400 and impact the ceiling 400, thereby simulating the impact of the air curtain inflation on the ceiling 400. The measuring component 300 can move relative to the fixed support 100, thereby moving with the deformation of the ceiling 400, which facilitates the measurement of the actual deformation state of the ceiling 400.

[0052] When the roof 400 is deformed by the impact component 200, the measuring component 300 is adapted to be pushed by the roof 400 to measure the deformation of the roof 400.

[0053] According to the test apparatus for the roof 400 proposed in the first aspect of the present application, the fixed bracket 100 can stably fix the roof 400 in a preset position, which not only simulates the actual installation state of the roof 400 on the vehicle (such as support stiffness and fixing method), avoiding the impact position deviation caused by the displacement and shaking of the roof 400 during the test, but also provides a unified positioning reference for the impact component 200 and the measuring component 300, ensuring that the relative positions of the two with the roof 400 are stable.

[0054] It can accurately simulate real-world scenarios and capture the actual deformation of the roof 400. The fixed bracket 100 first stabilizes the roof 400, providing a reliable benchmark for subsequent dynamic tests and preventing the roof 400 from shifting as a whole due to impact or deformation. This ensures that the test process closely matches the actual installation state of the roof 400 on the vehicle. The impact component 200, by moving and applying impact to one side of the roof 400, can recreate the impact process of the vehicle's air curtain inflating on the roof 400. When the air curtain inflates, it does not only apply force to a single point on the roof 400, but dynamically pushes it along a certain trajectory, which is closer to the real collision scenario and makes the test results more valuable.

[0055] Furthermore, the movable design of the measuring component 300 allows it to move synchronously with the deformation of the roof 400. When the roof 400 is impacted and deforms, the measuring component 300 will not remain fixed, but will move in real time with the deformation trajectory of the roof 400, always maintaining effective contact with the roof 400. This reduces the situation where traditional fixed measuring devices lose contact due to the deformation of the roof 400, resulting in incomplete capture of deformation data. It can accurately record the dynamic data of the roof 400 from its initial state to its maximum deformation, truly reflecting the deformation state of the roof 400.

[0056] This design eliminates the need for an additional complex air curtain simulation system or deformation transmission structure. It achieves realistic impact simulation and real-time deformation measurement solely through the movement characteristics of the components themselves. This simplifies the overall structure of the test device, reduces the complexity of the test operation, and ensures that the test data is both close to the real scene and highly accurate. It provides a reliable basis for optimizing the impact resistance performance of the roof 400, helps to construct an air curtain simulation model more accurately, and improves the detection accuracy of the air curtain subsystem blast simulation test.

[0057] In other embodiments, please refer to Figure 1 and Figure 2 The impact assembly 200 includes a drive unit 210, a mounting plate 220, and multiple impact hammers 230. The multiple impact hammers 230 are all disposed on the mounting plate 220. The mounting plate 220 is slidably disposed on the fixed bracket 100. The drive unit 210 is disposed on the fixed bracket 100 and is in dynamic cooperation with the mounting plate 220.

[0058] This setup allows for a more accurate reproduction of the real impact scenario of the air curtain inflation on the ceiling 400. On one hand, multiple impact hammers 230 are integrated into the mounting plate 220, which can simulate the impact force of the air curtain on the ceiling 400 when it inflates. It can be understood that when the air curtain is actually inflated, it will contact the ceiling 400 along a certain range and apply a uniform thrust. Multiple impact hammers 230 can act synchronously on the corresponding area of ​​the ceiling 400, which helps to reduce the deviation between the simulation and the real scene, improve the accuracy of the simulation, and make the impact load closer to the actual working conditions.

[0059] On the other hand, the mounting plate 220 is slidably mounted on the fixed bracket 100 and powered by the drive unit 210, which can drive multiple impact hammers 230 to slide stably along a preset trajectory (such as the dynamic path of the air curtain expansion) and impact the roof 400, accurately reproducing the dynamic continuous impact process of the air curtain on the roof 400 from the start of inflation to full expansion, and improving the simulation accuracy of the roof 400's force deformation response in real collisions.

[0060] Meanwhile, the power coordination between the drive unit 210 and the mounting plate 220 can precisely control the impact speed, force and sliding trajectory, such as simulating the inflation rate differences of different types of air curtains, adapting to the test requirements of different ceilings 400, and the sliding guide of the mounting plate 220 can ensure that multiple impact hammers 230 always maintain synchronous operation, avoiding the deviation of the impact trajectory caused by uneven force on the impact hammers 230, and further improving the accuracy of impact simulation.

[0061] In other embodiments, please refer to Figure 1 and Figure 2 The impact assembly 200 also includes a plurality of connecting rods 240. Along the length of the connecting rods 240, a corresponding impact hammer 230 is provided on one side of each connecting rod 240, and the other side of each connecting rod 240 is provided on the mounting plate 220. Each connecting rod 240 is provided with a piezoelectric sensor 250.

[0062] In the above scheme, the piezoelectric sensor 250 is directly integrated into the connecting rod 240, which can accurately capture the real-time impact force at the moment of contact between the impact hammer 230 and the ceiling 400. The connecting rod 240 serves as the force transmission path between the impact hammer 230 and the mounting plate 220. The sensor is located on this path, which can reduce the impact of force attenuation during transmission on the detection accuracy. Compared with placing the sensor inside the mounting plate 220 or the impact hammer 230, it can more directly reflect the actual load of the impact hammer 230 on the ceiling 400, improve the measurement accuracy, and provide accurate force data support for analyzing the correspondence between the force and deformation of the ceiling 400.

[0063] Meanwhile, multiple connecting rods 240 correspond to independent piezoelectric sensors 250, which can realize multi-point independent force signal acquisition. Combined with the planar impact simulated by multiple impact hammers 230, the force difference of different impact points of the ceiling 400 can be obtained simultaneously, such as the impact force distribution of the edge and center areas. This avoids the limitation that a single sensor cannot distinguish local forces, helps to determine the impact resistance performance differences of different areas of the ceiling 400, and improves the precision of test data and test efficiency.

[0064] In addition, the piezoelectric sensor 250 has a high response speed and can capture the dynamic changes of impact force during the impact process, such as peak force, force rise time, and force maintenance duration. It can accurately reproduce the dynamic characteristics of impact force when the air curtain is inflated and expands, and provide a complete data chain for subsequent analysis of the deformation law of the canopy 400 under dynamic load and the stress-strain response of the material, avoiding the problem that static force measurement cannot reflect the real impact conditions.

[0065] In other embodiments, please refer to Figure 1 and Figure 2The mounting plate 220 is provided with multiple mounting holes 221. The other side of each connecting rod 240 passes through the corresponding mounting hole 221. The distance between the mounting plate 220 and the impact hammer 230 is adjustable along the length of the connecting rod 240.

[0066] In the above scheme, the installation position and number of the connecting rods 240 can be flexibly adjusted according to the air curtain coverage of different roofs 400, so as to achieve precise arrangement of the impact hammers 230 in the impact area of ​​the roof 400. For example, the impact points can be increased or decreased, and the spacing between the impact points can be adjusted. There is no need to replace the special mounting plate 220, so it can be adapted to the test requirements of roofs 400 of different models.

[0067] Meanwhile, the distance between the mounting plate 220 and the impact hammer 230 is adjustable. The initial suspension distance of the impact hammer 230 can be adjusted according to the thickness of the ceiling 400 to ensure that it can effectively contact the ceiling 400 and transmit the preset force during impact. The spacing can also be finely adjusted in combination with the installation position of the piezoelectric sensor 250, such as optimizing the distance between the sensor and the impact hammer 230 and the mounting plate 220 to avoid vibration interference areas and further improve the accuracy of force signal acquisition. It can also simulate the difference in impact depth on the ceiling 400 when the air curtain is fully inflated and partially inflated, such as the pushing distance when the air curtain is fully inflated and partially inflated, so that the impact simulation is closer to the real working conditions.

[0068] Furthermore, distance adjustment does not require disassembling the entire impact assembly 200. Simply loosen the fixing structure between the connecting rod 240 and the mounting hole 221, such as by tightening the lock nut, and move the mounting plate 220 or the connecting rod 240 along the length of the rod to complete the adjustment. The operation is simple and quick, which greatly shortens the switching time between different test conditions and reduces the test preparation cost. At the same time, it takes into account the structural stability. After adjustment, re-fixing can ensure that the connecting rod 240 does not shift during the impact, thus ensuring the consistency and reliability of the test data.

[0069] In other embodiments, each connecting rod 240 is rotatable relative to the mounting hole 221 to adjust the impact angle of the corresponding impact hammer 230.

[0070] In the above scheme, the rotatable connecting rod 240 can simulate the actual impact angle differences of different vehicle models' air curtains on the roof 400. Due to the different installation positions (such as side air curtains and head air curtains) and expansion directions of vehicle air curtains, the impact on the roof 400 is not in a single vertical direction. By rotating the connecting rod 240 to adjust the angle of the impact hammer 230, the working conditions of multi-angle impact can be reproduced, avoiding the deviation of the impact direction from the real scene caused by the fixed angle, and improving the accuracy of the test results.

[0071] Meanwhile, without replacing the impact hammer 230 or connecting rod 240, the impact angle can be continuously adjusted simply by rotating it. This allows for testing the core deformation resistance of the roof 400 under vertical impact, as well as verifying its edge tear resistance and local indentation resistance under inclined impact, thus greatly expanding the test coverage and improving the versatility of the device.

[0072] In other embodiments, please refer to Figure 1 and Figure 2 Multiple impact hammers 230 are arranged in sequence along the front and back direction of the ceiling 400.

[0073] Understandably, the vehicle roof 400 extends along the front-to-back direction of the vehicle, covering the head area from the front row to the rear row. Multiple impact hammers 230 are arranged sequentially along the front-to-back direction, which can improve the degree of consistency between the impact area and the actual effective range of the air curtain, and enhance the realism of the test scenario.

[0074] At the same time, it can simulate the dynamic expansion process of the air curtain in the front and back direction when it is inflated. The front and back arrangement of the impact hammer 230 can be controlled by the drive unit 210 to achieve sequential or synchronous impact in the front and back direction, reproduce the timing characteristics of the air curtain expansion, and more accurately reflect the deformation transmission law of the roof 400 in the front and back direction during actual collision, such as whether the front deformation affects the rear structure.

[0075] In other embodiments, please refer to Figure 1 and Figure 2 The drive unit 210 includes a motor 211, a drive plate 212, and a drive rod 213.

[0076] The motor 211 is mounted on the fixed bracket 100. The power output end of the motor 211 is connected to the drive plate 212. One side of the drive rod 213 is mounted on the mounting plate 220, and the other side of the drive rod 213 is mounted on the drive plate 212 and spaced apart from the power output end of the motor 211.

[0077] In the above scheme, the power of the motor 211 is first transmitted to the drive plate 212, and then evenly transmitted to the mounting plate 220 through the drive rod 213. This avoids overload damage to the power output end of the motor 211 due to directly bearing the overall weight of the mounting plate 220 and the impact hammer 230 or the impact reaction force, thus extending the service life of the motor 211. At the same time, it ensures smoother power transmission and reduces transmission jamming caused by local force concentration.

[0078] Meanwhile, the drive rod 213 and the power output end of the motor 211 are spaced apart. When the motor 211 drives the drive rod 213 to move through the drive plate 212, the rotational torque of the motor 211 can be more efficiently converted into the sliding power of the mounting plate 220 along the fixed bracket 100. Especially when driving multiple impact hammers 230 to impact synchronously, it can prevent the mounting plate 220 from tilting or shifting due to the concentration of force points, ensuring that the mounting plate 220 always slides at a uniform speed along the preset trajectory. This ensures that the impact speed and force of the impact hammers 230 are uniform and stable, accurately matching the dynamic rate characteristics of the air curtain inflation and expansion, and improving the consistency of the impact simulation.

[0079] In addition, the motor 211 can change the movement speed and displacement of the drive plate 212 by adjusting the speed (rotary motor 211 in conjunction with the transmission mechanism) or controlling the stroke (linear motor 211), and then transmit it synchronously to the mounting plate 220 through the drive rod 213, so as to realize the fine adjustment of the impact speed and impact stroke of the impact hammer 230, which is convenient for simulating the rapid inflation and slow inflation process of different types of air curtains, and meeting the impact resistance performance test requirements of different ceilings 400.

[0080] As an example, the drive plate 212 can be constructed as an eccentric moving part such as a disk, cam, eccentric wheel, or crank connecting rod, and this application does not limit it in this way.

[0081] In other embodiments, please refer to Figure 1 and Figure 3 The measuring assembly 300 includes multiple measuring rod groups 310, which are spaced apart along the length of the ceiling 400. Each measuring rod group 310 includes multiple measuring rods 311 spaced apart along the vertical direction.

[0082] In the above scheme, multiple sets of measuring rods 310 are spaced apart along the length of the roof 400, which can fully cover different areas of the roof 400, corresponding to the head coverage areas of the front and rear seats of the vehicle, or the extended area from the A-pillar to the C-pillar. When the air curtain is impacted, the deformation of the roof 400 is often not a local change at a single location, but rather a gradient distribution along the length. Multiple sets of measuring rods 311 can simultaneously record the deformation of each area, improving the accuracy and comprehensiveness of the test and reducing the substitution of overall deviation by local data due to the limitations of measurement points.

[0083] Meanwhile, the multiple measuring rods 311 arranged vertically in each measuring rod group 310 can capture the deformation differences of the same area at different heights. When the ceiling 400 is deformed by impact, the protruding or concave contours of its surface are not flat planes. The maximum deformation may occur at a certain height, or it may present different gradient characteristics of deformation. The vertically spaced measuring rods 311 can comprehensively detect the deformation, which helps to improve the accuracy of the test.

[0084] Furthermore, it is easy to adapt to roof structures of different lengths and curvatures, such as the length difference between car roofs and MPV roofs 400, or roof surfaces with curvature. By adjusting the spacing of the measuring rod group 310 and the density of the rods in the vertical direction, it can not only meet the overall measurement needs of large-area roofs 400, but also perform high-density measurements on key areas (such as the main working area of ​​the air curtain), taking into account both measurement efficiency and data accuracy.

[0085] As an example, multiple measuring rods 311 can be arranged in an array or at different intervals, and this application does not limit this.

[0086] In other embodiments, please refer to Figure 1 and Figure 2 The fixed support 100 includes a first support 110 and a second support 120. The first support 110 is provided with a measuring component 300 and a canopy 400, and the second support 120 is provided with an impact component 200.

[0087] In the above scheme, separating the second support 120 supporting the impact component 200 from the first support 110 supporting the ceiling 400 and the measuring component 300 can effectively block the transmission of vibration during the impact process. When the impact component 200 is working (such as the drive unit 210 driving the impact hammer 230 to impact the ceiling 400), it will generate mechanical vibration. If it is set together with the measuring component 300 on the same support, the vibration can easily cause the measuring rod 311 to deviate or the sensor to be falsely triggered. The separate design can avoid vibration interference with the measuring component 300, ensuring that the deformation data captured by the measuring component 300 truly reflects the deformation of the ceiling 400 itself, rather than the error caused by the vibration of the support, thus greatly improving the measurement accuracy.

[0088] Meanwhile, the independent setting of the first bracket 110 and the second bracket 120 facilitates individual adjustment for different test requirements. The first bracket 110 can precisely adjust the fixed position of the roof 400 and the layout of the measuring component 300 according to the size and shape of the roof 400, such as adding or removing the measuring rod group 310 and adjusting the height of the measuring rod 311. The second bracket 120 can independently optimize the installation height and sliding trajectory of the impact component 200, such as adapting to different air curtain installation positions for simulation. There is no need to affect the overall structure due to the adjustment of a certain component. Especially when adapting to roof 400 tests of multiple vehicle models, the bracket parameters can be quickly switched, improving test adaptability.

[0089] In other embodiments, the test apparatus further includes a deformation acquisition mechanism for acquiring the deformation of the ceiling 400 measured by the measuring component 300.

[0090] It is understood that the deformation acquisition mechanism can detect the displacement of the measuring rod 311 and improve the acquisition accuracy and efficiency through automatic acquisition. The deformation acquisition mechanism may include non-contact devices such as laser radar scanners and infrared rangefinders, and this application does not limit it.

[0091] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0092] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0093] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0094] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A testing apparatus for a ceiling, characterized in that, include: A fixed bracket (100) is provided with the canopy (400); An impact assembly (200) and a measuring assembly (300) are provided, both of which are movably mounted on the fixed bracket (100). Along the thickness direction of the canopy (400), the impact assembly (200) and the measuring assembly (300) are located on opposite sides of the canopy (400). When the ceiling (400) is deformed by the impact component (200), the measuring component (300) is adapted to be pushed by the ceiling (400) to measure the deformation of the ceiling (400).

2. The experimental apparatus according to claim 1, characterized in that, The impact assembly (200) includes a drive unit (210), a mounting plate (220), and a plurality of impact hammers (230). The plurality of impact hammers (230) are all disposed on the mounting plate (220). The mounting plate (220) is slidably disposed on the fixed bracket (100). The drive unit (210) is disposed on the fixed bracket (100) and is in dynamic cooperation with the mounting plate (220).

3. The experimental apparatus according to claim 2, characterized in that, The impact assembly (200) also includes a plurality of connecting rods (240). Along the length of the connecting rods (240), each connecting rod (240) has a corresponding impact hammer (230) on one side and the other side of each connecting rod (240) is disposed on the mounting plate (220). Each connecting rod (240) is provided with a piezoelectric sensor (250).

4. The experimental apparatus according to claim 3, characterized in that, The mounting plate (220) is provided with a plurality of mounting holes (221), and the other side of each connecting rod (240) passes through the corresponding mounting hole (221). Along the length direction of the connecting rod (240), the distance between the mounting plate (220) and the impact hammer (230) is adjustable.

5. The test apparatus according to claim 4, characterized in that, Each of the connecting rods (240) is rotatable relative to the mounting hole (221) to adjust the impact angle of the corresponding impact hammer (230).

6. The test apparatus according to any one of claims 2-5, characterized in that, Along the front-back direction of the canopy (400), a plurality of impact hammers (230) are arranged in sequence.

7. The test apparatus according to claim 2, characterized in that, The drive unit (210) includes a motor (211), a drive plate (212), and a drive rod (213). The motor (211) is mounted on the fixed bracket (100), and the power output end of the motor (211) is connected to the drive plate (212). One side of the drive rod (213) is mounted on the mounting plate (220), and the other side of the drive rod (213) is mounted on the drive plate (212) and spaced apart from the power output end of the motor (211).

8. The test apparatus according to claim 1, characterized in that, The measuring assembly (300) includes a plurality of measuring rod groups (310), which are spaced apart along the length of the ceiling (400), and each measuring rod group (310) includes a plurality of measuring rods (311) spaced apart along the vertical direction.

9. The experimental apparatus according to claim 1, characterized in that, The fixed bracket (100) includes a first bracket (110) and a second bracket (120). The first bracket (110) is provided with the measuring component (300) and the canopy (400), and the second bracket (120) is provided with the impact component (200).

10. The experimental apparatus according to claim 1, characterized in that, The test apparatus also includes a deformation acquisition mechanism, which is used to acquire the deformation of the ceiling (400) measured by the measuring component (300).

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