A batch testing bench for automotive seat airbags

Abstract

This invention discloses a mass testing bench for automotive seat airbags, comprising a frame structure and an image acquisition device. The frame structure encloses a receiving space, which is divided into multiple rectangular sub-spaces by partitions. Each rectangular sub-space is equipped with a clamping device for clamping seat backs. At least one of the first and second outer sides of each rectangular sub-space is provided with a transparent plate located on the side of the seat back, simulating a door panel. The transparent plate is provided with a first grid line and a second grid line perpendicular to each other, and each grid line is equipped with a grating sensor. The image acquisition device includes a first image acquisition device and a second image acquisition device facing the first and second outer sides respectively. The advantages of this invention are that multiple seat backs can be installed under one working condition, enabling mass testing under one working condition, rapid batch completion of the seat airbag development and approval matrix, and improved testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and more specifically, to a mass testing bench for automotive seat airbags. Background Technology

[0002] In the development of automotive seats, the performance of seat airbags is crucial to the protection of occupants in the event of an accident. Therefore, seat manufacturers and OEMs need to conduct multiple rounds of verification tests under different temperature conditions to test the stability of the seat airbag system before the vehicle is officially released. For example, verification tests for propellant charge include high-temperature (85℃) airbag high limit, low-temperature (-35℃) airbag high limit, high-temperature (85℃) airbag low limit, low-temperature (-35℃) airbag low limit, high-temperature (85℃) airbag constant limit, low-temperature (-35℃) airbag constant limit, and normal temperature (23℃) airbag constant limit. The industry often uses vehicle-specific testing fixtures and traditional single-test methods under a single condition for verification. This testing method is inefficient, time-consuming, energy-intensive, and costly in seat airbag approval matrix testing, impacting the overall vehicle development schedule. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, the present invention provides a mass testing bench for automotive seat airbags. The test bench is provided with multiple rectangular sub-spaces, each of which can be equipped with a seat back for airbag deployment testing, thereby realizing mass testing of airbags.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] A mass testing bench for automotive seat airbags includes a frame structure and an image acquisition device. The frame structure includes an upper frame and a base plate, as well as multiple columns for connecting the upper frame and the base plate. The frame structure encloses a receiving space, which is divided into multiple rectangular sub-spaces by partitions. Each rectangular sub-space has at least a first outer side and a second outer side that overlap with the outer side of the receiving space. Each rectangular sub-space is equipped with a clamping device for clamping a seat back. At least one of the first and second outer sides of each rectangular sub-space is provided with a transparent plate located on the side of the seat back to simulate a door panel. The transparent plate located on the side of the seat back has a first grid line and a second grid line that are perpendicular to each other. Each grid line is equipped with a grating sensor for acquiring the airbag deployment position. The grating sensor corresponding to the first grid line is set as a first grating sensor, and the grating sensor corresponding to the second grid line is set as a second grating sensor. The image acquisition device includes a first image acquisition device and a second image acquisition device, which are respectively oriented towards the first and second outer sides of at least one rectangular sub-space.

[0006] Furthermore, the rectangular subspace may include two, three, or four.

[0007] Furthermore, the outer side of the first and second outer sides of each rectangular subspace facing the front of the seat back is set as an opening to facilitate the installation of the seat back.

[0008] Furthermore, the partition includes a mosaic panel, which is beneficial for high-speed cameras to capture images.

[0009] Furthermore, the clamping device includes a slide rail fixedly mounted on the base plate, the extension direction of the slide rail being perpendicular to the plane of the transparent plate; a first clamping plate is provided on the slide rail and slidably connected to the slide rail; a second clamping plate is fixedly mounted on the end of the slide rail away from the transparent plate; a threaded rod is provided on the side opposite to the first clamping plate and the second clamping plate, which is adapted to the fixing hole of the adjusting plate of the seat back, so as to facilitate fixing the seat back.

[0010] Furthermore, the image acquisition device includes at least one set, and each set of image acquisition devices includes a first image acquisition device and a second image acquisition device set in the same rectangular subspace. The slide rails of adjacent rectangular subspaces are set vertically or parallel, which can be used for side airbag detonation tests.

[0011] Furthermore, when the slide rails of adjacent rectangular subspaces are set in parallel, the image acquisition device is set to two sets corresponding to the two rectangular subspaces opposite to the side of the seat back. The partition between the two rectangular subspaces opposite to the side of the seat back is detachably set in the frame structure, which can be used for remote airbag deployment tests.

[0012] Furthermore, the image acquisition device includes at least one set, each set including a first image acquisition device and a second image acquisition device disposed in the same rectangular subspace, and a first image acquisition device disposed in adjacent rectangular subspaces facing the side of the seat back; the slide rails of each rectangular subspace are arranged in parallel; the partition between two rectangular subspaces facing the side of the seat back is detachably disposed in the frame structure, which can be used for remote airbag deployment tests.

[0013] Furthermore, when the rectangular subspace includes three or four, the test bench also includes a rotating device, which includes a base with a connecting hole in the middle; a rotating shaft is fixedly installed in the middle of the base plate, the rotating shaft passes through the connecting hole and can rotate in the connecting hole, so as to adjust the position of each rectangular subspace.

[0014] Furthermore, a locking pin is provided on the base plate, and multiple locking holes are provided on the base. Each locking hole is arranged around the circumference with its center located on the axis of rotation, which can lock the position of the base plate.

[0015] Furthermore, the rotating device also includes a drive motor, and the rotating shaft passes through a connecting hole and is connected to the output shaft of the drive motor; the control panel of the drive motor is located outside the environmental chamber, and the position of each rectangular subspace can be adjusted in high and low temperature environments.

[0016] Furthermore, the transparent plate is equipped with an angle measuring device, the origin of which is set as the projection of the seat back adjustment axis onto the transparent plate, to guide the adjustment angle of the seat back.

[0017] Furthermore, the test bench also includes a display device, which comprises a controller and a display circuit. Each grating sensor is connected to an input pin of the controller. The display circuit includes multiple sub-circuits corresponding to the first and second grating sensors. Each sub-circuit includes a control switch and an indicator light connected in series. The signal interface of the control switch is connected to an output pin of the controller. The indicator light includes a first light and a second light. The controller controls the indicator light status through the airbag deployment position signal and deployment time sent by the grating sensors, and can display the verification results of the airbag detonation test.

[0018] Furthermore, the controller includes at least one control unit, which is electrically connected to the airbag deployment system. The control unit includes a timing module and two sets of control modules. The timing module is used to record the airbag deployment time according to the airbag deployment trigger signal.

[0019] Each control module group includes:

[0020] The position receiving module is used to receive the airbag deployment position signal sent by the grating sensor;

[0021] The position comparison module is used to compare the airbag deployment position signal sent by the received grating sensor with a preset position threshold.

[0022] The position output module is used to output a signal indicating that the airbag has deployed to the correct position based on the comparison result from the position comparison module.

[0023] The time comparison module is used to compare the airbag deployment time t with a preset time threshold.

[0024] The indicator output module is used to control the indicator status of the indicator light based on the comparison result of the time comparison module.

[0025] Furthermore, the time thresholds preset in the time comparison module include a first time threshold T1 and a second time threshold T2. When the airbag deployment time t ≤ the first time threshold T1, the indicator light displays a first color; when the first time threshold T1 < the airbag deployment time t ≤ the second time threshold T2, the indicator light displays a second color; and when the airbag deployment time t > the second time threshold T2, the indicator light displays a third color. The indicator light displays different colors to distinguish the verification results, which is intuitive and clear.

[0026] Furthermore, the test bench also includes an airbag detonation system, which is connected to each airbag under test and is used to detonate each airbag under test.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] (1) The test bench includes multiple rectangular subspaces. Each rectangular subspace can be fixed by clamping device. The test bench can install multiple seat backs under one working condition and can conduct batch tests under one working condition. It can quickly complete the development and approval matrix of seat airbags in batches, improve test efficiency, shorten the testing cycle of parts and vehicle development cycle, ensure the vehicle approval progress, and reduce test costs and vehicle development costs.

[0029] (2) By setting a detachable partition, the test bench can carry out point-deployment tests of side airbags and new remote airbags, and has a wide range of applications.

[0030] (3) The test bench can be set up with only one set of image acquisition equipment. The position of each rectangular subspace can be adjusted by the rotation device so that the rectangular subspace where each airbag to be tested is located can be rotated to the position of the image acquisition equipment, so as to meet the needs of different positions and save costs while realizing batch testing. Attached Figure Description

[0031] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0032] Figure 1 This is a schematic diagram of the structure of the batch testing bench for automotive seat airbags of the present invention.

[0033] Figure 2 This is a schematic diagram of the rectangular subspace arrangement of the present invention.

[0034] Figure 3 This is a schematic diagram of the clamping device of the present invention.

[0035] Figure 4 This is a schematic diagram of an embodiment of the image acquisition device layout of the present invention.

[0036] Figure 5 This is a schematic diagram of another embodiment of the image acquisition device layout of the present invention.

[0037] Figure 6 This is a schematic diagram of the rotating device structure of the present invention.

[0038] Figure 7 This is a structural block diagram of the controller of the present invention.

[0039] In the diagram: 1. Frame structure; 11. Upper frame; 12. Base plate; 13. Column; 14. Partition; 15. Transparent plate; 16. Opening; 17. Casters; 2. Image acquisition equipment; 3. Clamping device; 31. Slide rail; 32. First clamping plate; 33. Second clamping plate; 34. Threaded rod; 35. Lead screw; 351. Handle; 36. Connecting plate; 361. Elongated hole; 4. Rotating device; 41. Base; 411. Connecting hole; 42. Lower tray ; 421. Clearance hole; 422. Locking hole; 43. Upper tray; 431. Rotating shaft; 432. End plate; 44. Locking pin; 5. Controller; 51. Control unit; 511. Timing module; 512. Control module; 5121. Position receiving module; 5122. Position comparison module; 5123. Position output module; 5124. Time comparison module; 5125. Indicator output module; 6. Control switch; 7. Indicator light; 8. Seat backrest. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0041] In the description of this invention, it should be noted that the term "comprising" and its variations indicate an open-ended inclusion, i.e., "including but not limited to". The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "and / or" when used to list two or more items means that it may include any one of the listed items, or any combination of two or more of the listed items. Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] This invention provides a batch testing bench for automotive seat airbags, such as... Figure 1 As shown, the device includes a frame structure 1 and an image acquisition device 2. The frame structure 1 includes an upper frame 11 and a base plate 12, as well as multiple columns 13 for connecting the upper frame 11 and the base plate 12. The frame structure 1 encloses a receiving space, which is divided into multiple rectangular sub-spaces by partitions 14. Each rectangular sub-space has at least a first outer side and a second outer side that overlap with the outer side of the receiving space. Each rectangular sub-space is provided with a clamping device 3 for clamping a seat back 8. At least one of the first and second outer sides of each rectangular sub-space is provided with a transparent plate 15 located on the side of the seat back 8 to simulate a door panel. The transparent plate 15 located on the side of the seat back 8 has a first grid line and a second grid line that are perpendicular to each other. Each grid line is provided with a grating sensor for collecting the airbag deployment position. The grating sensor corresponding to the first grid line is set as a first grating sensor, and the grating sensor corresponding to the second grid line is set as a second grating sensor. The image acquisition device 2 includes a first image acquisition device and a second image acquisition device, which are respectively oriented towards the first and second outer sides of at least one rectangular sub-space.

[0043] The upper frame 11 and the uprights 13 can be made of 50*50mm profiles, which are low in cost and lightweight. The base plate 12 can be made of rectangular steel plate. At least four uprights 13 are used to connect the upper frame 11 and the base plate 12. The transparent plate 15 can be made of 10mm thick acrylic sheet to simulate a car door panel. Acrylic glass has high transparency, which allows for clearer capture of the side deployment shape of the seat airbag by high-speed cameras. Acrylic glass has high mechanical strength, making it less prone to breakage under the impact of the airbag, and it can withstand various high and low temperature environments, exhibiting superior performance in airbag deployment test environments (-35℃, 85℃). The first and second image acquisition devices can use high-speed cameras or high-speed video cameras (at least 2000 frames / s). To capture clear images, the image acquisition device 2 is equipped with a lighting system. For example, the first outer side is located on the side of the seat back 8, and the first image acquisition device facing the first outer side can record the side deployment shape of the airbag. The second outer side faces the front of the seat back 8, and the second image acquisition device facing the second outer side can record the front deployment shape of the airbag.

[0044] The first and second grid lines can be set as straight lines extending horizontally and vertically along the transparent plate 15, respectively, with the horizontal and vertical grid lines intersecting to form a coordinate grid. When the airbag deploys, it blocks light, allowing the deployment position of the airbag to be acquired by grating sensors set on each grid line. The first and second grid lines can be directly drawn or etched onto the acrylic plate, with the spacing between adjacent grid lines set to 10mm. Alternatively, an electronic digital display of the grid lines can be emitted using a laser projection angle meter.

[0045] During testing, each seat backrest 8 is fixed to its respective rectangular sub-space using clamping devices 3. According to GB / T38795-2020 Performance Requirements for Automotive Side Airbags and Curtain Airbag Modules, once the environmental chamber reaches the set temperatures (-35℃, 23℃, 85℃), multiple seat airbags can be tested for deployment under the same conditions. This enables batch testing of airbags, allowing for rapid, large-scale completion of the seat airbag development approval matrix, improving testing efficiency, shortening component testing and vehicle development cycles, ensuring vehicle approval progress, and reducing testing and vehicle development costs. The seat backrest 8 can be a real vehicle seat backrest 8 or a dummy backrest. Compared to vehicle-mounted testing, this test bench allows for batch airbag deployment testing with a smaller footprint, enabling the use of a smaller environmental chamber and further saving energy consumption.

[0046] In some embodiments, the rectangular subspaces may include two, three, or four. For example... Figure 2 As shown, when there are two rectangular subspaces, the upper frame 11 is U-shaped, allowing for the deployment of two seat airbags under the same conditions. When there are three rectangular subspaces, the upper frame 11 is L-shaped, allowing for the deployment of three seat airbags under the same conditions. When there are four rectangular subspaces, the upper frame 11 is Grid-shaped, allowing for the deployment of four seat airbags under the same conditions. Depending on the number of image acquisition devices 2 and the ambient temperature of the cabin, single-sided, single-time deployment of the seat airbags or simultaneous deployment can be achieved.

[0047] Preferably, the outer side facing the front of the seat back 8 on the first and second outer sides of each rectangular subspace is set as an opening 16. No transparent plate 15 is provided at the opening 16, allowing the seat back 8 to be placed into the rectangular subspace for installation and adjustment.

[0048] Preferably, the partition 14 includes a mosaic board. The mosaic board can serve as the base plate 12 for high-speed cameras, helping the high-speed cameras to more clearly capture the overall state during the experiment. The mosaic board can be made of colors that are conducive to image acquisition, such as alternating red and black or alternating yellow and black.

[0049] In some embodiments, reference Figure 1and Figure 3 As shown, the clamping device 3 includes a slide rail 31 fixedly mounted on the base plate 12, the extension direction of which is perpendicular to the plane of the transparent plate 15. A first clamping plate 32 is provided on the slide rail 31, which is slidably connected to it. A groove adapted to the slide rail 31 can be provided at the bottom of the first clamping plate 32, allowing the first clamping plate 32 to slide along the slide rail 31. A second clamping plate 33 is fixedly mounted on the end of the slide rail 31 away from the transparent plate 15. The second clamping plate 33 can be directly welded to the base plate 12, or it can be configured as a flanged structure, fixed to the base plate 12 by bolts passing through the flange. A threaded rod 34, adapted to the fixing hole of the adjuster connecting plate of the seat backrest 8, is provided on the opposite side of the first clamping plate 32 and the second clamping plate 33. Generally, the fixing hole of the adjuster connecting plate of the seat backrest 8 is two through holes; correspondingly, there are two threaded rods 34 on the first clamping plate 32 and the second clamping plate 33.

[0050] When installing the seat backrest 8, face the opening with the front of the seat backrest 8, and press one side of the seat backrest 8 against the second clamping plate 33. Insert the threaded rod 34 on the second clamping plate 33 into the fixing hole of the angle adjuster connecting plate and tighten it with a nut. Then move the first clamping plate 32 so that it presses against the other side of the seat backrest 8. Insert the threaded rod 34 on the first clamping plate 32 into the fixing hole on the other side of the seat backrest 8 and tighten it with a nut, thereby fixing the seat backrest 8 to the clamping device 3. Then adjust the seat backrest 8 to the required angle. The threaded rod 34 can be connected to the two clamping plates through the connecting plate 36. The connecting plate 36 is fixed to the clamping plates by a bolt and nut assembly. The threaded rod 34 can be directly welded or screwed to the connecting plate 36. Preferably, the first clamping plate 32, the second clamping plate 33, and the corresponding connecting plate 36 are provided with elongated holes 361. The extending direction of the elongated holes 361 is adapted to the extending direction of the connecting line between the two fixing holes of the adjuster connecting plate. At least one threaded rod 34 on each clamping plate is detachably connected to the clamping plate. When fixing the seat back 8, after aligning the elongated holes 361 with the fixing holes of the adjuster connecting plate, the threaded rod 34 is passed through the two elongated holes 361 and the fixing holes and then tightened with a nut. In this way, the threaded rod 34 can move along the elongated holes 361, and the distance between the two threaded rods 34 can be adjusted to suit different sizes of adjuster connecting plates. The distance between the second clamping plate 33 and the transparent plate 15 can be adapted to the distance between the side of the seat away from the door panel and the door panel, for example, it can be set to about 80-120mm. The distance between the first clamping plate 32 and the second clamping plate 33 of the clamping device 3 is adjustable, and the clamping device 3 can be used for multiple vehicle models.

[0051] Preferably, the clamping device 3 further includes a lead screw 35 arranged parallel to the slide rail 31. The first end of the lead screw 35 passes through the first clamping plate 32 and is rotatably connected to the second clamping plate 33. The first clamping plate 32 and the lead screw 35 are threadedly connected. The first end of the lead screw 35 can abut against the second clamping plate 33, or the second clamping plate 33 can have a through hole or a threaded hole through which the first end of the lead screw 35 passes. Rotating the lead screw 35 can drive the first clamping plate 32 to move along the lead screw 35, that is, along the slide rail 31. To facilitate the rotation of the lead screw 35, a handle 351 can be provided at the second end of the lead screw 35 for easier operation.

[0052] In some embodiments, the image acquisition device 2 includes at least one group, and each group of image acquisition devices 2 includes a first image acquisition device and a second image acquisition device disposed in the same rectangular subspace. (Reference) Figure 2 As shown, depending on the arrangement of the rectangular subspaces, the image acquisition devices 2 can be set to one, two, three, or four groups. When the number of image acquisition devices 2 groups is greater than or equal to the number of rectangular subspaces where the seat backrests 8 under test are installed, the deployment state of the airbags in each rectangular subspace can be captured simultaneously. When the number of image acquisition devices 2 groups is less than the number of rectangular subspaces where the seat backrests 8 under test are installed, the position of the rectangular subspaces can be adjusted under the same working conditions so that the rectangular subspaces where each seat backrest 8 is located can face the image acquisition devices 2, and the airbags can be tested one by one.

[0053] refer to Figure 2 As shown in Figure a, when the rectangular subspaces are set to two (A and B), the image acquisition device 2 is preferably set to two groups, which can capture the deployment state of the two airbags after they are detonated. (Reference) Figure 2 As shown in Figure b, when the rectangular subspaces are set to three (A, B, C), the image acquisition device 2 can be set to one, two, or three groups. (Reference) Figure 2 As shown in Figure c, when the rectangular subspaces are set to four (ABCD), the image acquisition device 2 can be set to one, two, three, or four groups.

[0054] When the test bench of this embodiment is used for seat side airbag deployment tests, the slide rails 31 of adjacent rectangular subspaces can be arranged vertically or parallelly. When the slide rails 31 of each adjacent rectangular subspace are arranged vertically, the planes on the sides of adjacent seat backrests 8 are perpendicular, and each transparent plate 15 is arranged with an opening 16 spaced apart, such as... Figure 4 As shown. When the slide rails 31 of each adjacent rectangular subspace are set in parallel, the planes on which the sides of adjacent seat backrests 8 are located are parallel or coplanar, and the adjacent transparent panels 15 are set in parallel or coplanar, as shown. Figure 2 As shown in Figure c.

[0055] Seats are a crucial component of a car's restraint system. With the development of automotive intelligence in recent years, many user-friendly features have been added to seats, enhancing passenger comfort and safety. For example, some car seats are equipped with remote airbags, which are located between the front passengers. In the event of a side collision, these airbags can prevent the front passengers from colliding with each other and causing injury, effectively protecting the safety of the occupants.

[0056] In some embodiments, when the slide rails 31 of adjacent rectangular subspaces are arranged in parallel, the image acquisition device 2 is configured as two sets corresponding to the two rectangular subspaces opposite to the sides of the seat back 8. The partition 14 between the two rectangular subspaces opposite to the sides of the seat back 8 is detachably disposed on the frame structure 1. For example, the partition 14 is slidably connected to the upper frame 11 and / or the bottom plate 12 via a slide rail. Removing the partition 14 between these two rectangular subspaces can also be used to perform a detonation test on the distal airbag. When testing the distal airbag, the partition 14 is pulled out; when testing the side airbag, the partition 14 is pushed into the space between the two rectangular subspaces.

[0057] For example, refer to Figure 2 As shown in Figure a, when detecting the remote airbag, the driver's seat back 8 is installed in space A, and the passenger seat back 8 is installed in space B. The remote airbag deploys between the two seat backs 8. Since the partition 14 between space A and space B has been removed, the grating sensor set on the transparent plate 15 of space A and / or space B can collect the deployment position of the remote airbag. High-speed cameras 1# and / or 4# can collect the side deployment state of the remote airbag, and high-speed cameras 2# and / or 3# can collect the front deployment state of the remote airbag.

[0058] Understandably, the distal airbag and the side airbags located in these two rectangular subspaces cannot be deployed simultaneously to avoid the side airbags obstructing the sides of the distal airbag, which would interfere with the signals collected by the grating sensor and the images collected by the high-speed camera.

[0059] In some embodiments, the image acquisition device 2 includes at least one group, each group including a first image acquisition device and a second image acquisition device disposed in the same rectangular subspace, and first image acquisition devices disposed in adjacent rectangular subspaces facing the side of the seat back 8; the slide rails 31 of each rectangular subspace are arranged in parallel. (Reference) Figure 5As shown, depending on the arrangement of the rectangular subspaces, the image acquisition devices 2 can be configured as one or two sets. The partition 14 between the two opposite rectangular subspaces on the sides of the seat back 8 is detachably mounted on the frame structure 1. The test bench in this embodiment can be used for seat side airbag deployment tests or distal airbag deployment tests. When testing distal airbags, the partition 14 is pulled out; when testing side airbags, the partition 14 is pushed into the space between the two rectangular subspaces. By configuring the image acquisition devices 2 as two sets corresponding to the two opposite rectangular subspaces on the sides of the seat back 8, the number of image acquisition devices 2 can be reduced, saving costs.

[0060] For example, refer to Figure 5 As shown, when detecting the remote airbag, the driver's seat back 8 is installed in space A, and the passenger seat back 8 is installed in space B. The remote airbag deploys between the two seat backs 8. Since the partition 14 between space A and space B has been removed, the grating sensor installed on the transparent panel 15 of space A and / or space B can collect the deployment position of the remote airbag. High-speed cameras #1 and / or #3 can collect the side deployment state of the remote airbag, and high-speed camera #2 can collect the front deployment state of the remote airbag.

[0061] In some embodiments, when the rectangular subspace comprises three or four, the test bench further includes a rotating device 4. (Reference) Figure 6 As shown, the rotating device 4 includes a base 41 with a connecting hole 411 in the middle. A rotating shaft 431 is fixedly mounted in the middle of the base plate 12, passing through the connecting hole 411 and rotating within it. The base 41 can be made of 10mm steel plate and serves as the base of the entire test bench. To ensure a more stable connection between the rotating shaft 431 and the base 41, a lower tray 42 can be fixedly mounted on the top of the base 41, with a clearance hole 421 in the middle of the lower tray 42. An upper tray 43 is fixedly mounted on the bottom of the base plate 12, and the rotating shaft 431 is fixedly mounted in the middle of the upper tray 43. After the rotating shaft 431 passes through the clearance hole 421 and the connecting hole 411, it can be confined within the connecting hole 411 by the end plate 432 to prevent it from coming out. When the rotating shaft 431 rotates within the connecting hole 411, the base plate 12 can rotate around the axis of the rotating shaft 431, adjusting the position of each rectangular subspace. To ensure smooth and effortless rotation of the base plate 12, the rotating shaft 431 can be connected to the base 41 via a bearing. The outer ring of the bearing is interference-fitted to the connecting hole 411, and the inner ring of the bearing is interference-fitted to the rotating shaft 431. Casters 17 can also be installed at the bottom of the base 41 to allow for free movement of the test bench.

[0062] In this embodiment, the image acquisition device 2 can be configured as a group to minimize the number of image acquisition devices 2 and save costs. Pushing the column 13 can drive the base plate 12 to rotate around the axis of the rotating shaft 431, thereby adjusting the position of each rectangular subspace. After rotating the rectangular subspace where the airbag to be tested is located to the position of the image acquisition device 2, the airbag is detonated, and the airbags located in each rectangular subspace are detonated one by one. For example, refer to Figure 2 As shown in Figure c, after the airbag in space A is detonated, rotating the base plate 12 counterclockwise by 90° will rotate space B to the position of image acquisition device 2. Rotating the base plate 12 counterclockwise by 90° will rotate space C to the position of image acquisition device 2. Rotating the base plate 12 counterclockwise by 90° will rotate space D to the position of image acquisition device 2. In this way, under the same working condition, the airbags in the four rectangular sub-spaces can be detonated sequentially. After the environmental chamber meets the test requirements, batch tests can be carried out. Compared with conducting a single airbag detonation test under one working condition, this greatly saves test time and energy consumption.

[0063] It is understandable that the rectangular subspace includes the square subspace and the rectangular subspace. When the rectangular subspace is set as a rectangular subspace, the length and width of the rectangular subspace are set such that when the rectangular subspace where each airbag to be tested is located is rotated to the position of the image acquisition device 2, the first and second outer sides of the rectangular subspace still face the first image acquisition device and the second image acquisition device.

[0064] To prevent the frame from rotating during airbag deployment and to ensure the high-speed camera can stably capture the airbag's deployment state, a locking pin 44 can be provided on the base plate 12, and multiple locking holes 422 can be provided on the base 41. Each locking hole 422 is arranged circumferentially around the axis of the rotating shaft 431. Preferably, the locking holes 422 can be located on the lower tray 42 of the base 41, and at least four locking holes 422 are evenly arranged circumferentially, allowing the base plate 12 to rotate 90°, 180°, 270°, and 360°. During testing in a normal temperature environment (23°C), the operator can enter the environmental chamber to manually adjust the position of each rectangular subspace and then lock the base plate 12 using the locking pin 44. The locking pin 44 is preferably a spring-loaded positioning pin; manually pulling up the locking pin 44 rotates the base plate 12 to a designated position, thereby rotating the rectangular subspace of the seat back 8 under test to the designated position. Then, the locking pin 44 is released, and the force of the return spring allows the locking pin 44 to insert into the locking hole 422 of the base 41 for locking. The locking pin 44 can be positioned on the base plate 12 near a through-hole 16 for easy operation.

[0065] In some embodiments, the rotating device 4 further includes a drive motor, and the rotating shaft 431 passes through the connecting hole 411 and is connected to the output shaft of the drive motor; the control panel of the drive motor is located outside the environmental chamber. The drive motor can be placed on the ground of the environmental chamber or mounted on the base 41 and move with the base 41. After the rotating shaft 431 passes through the connecting hole 411, it is connected to the output shaft of the drive motor through a coupling. The operation of the drive motor can drive the rotating shaft 431 to rotate. The control panel of the drive motor is located outside the environmental chamber via a cable. During high and low temperature environment (-35℃ and 85℃) tests, the operator can operate the control panel outside the environmental chamber to control the rotation of the drive motor by a predetermined angle, adjust the position of each rectangular subspace, and lock it.

[0066] In some embodiments, the transparent plate 15 is equipped with an angle measuring device. This device can use angle lines drawn directly on the acrylic plate, with a resolution of 1°, to guide the adjustment of the seat backrest 8 within a 0-90° range, ensuring that the angle between the seat backrest 8 and the horizontal or vertical direction meets the requirements of the "TL82380 Side Airbag Subsystem Test". Alternatively, a laser angle gauge can be used to indicate the adjusted angle of the seat backrest 8. The desired angle is input into the laser angle gauge, and the laser beam projects the corresponding angle line onto the acrylic plate. An angle gauge, universal angle ruler, or other similar devices can also be used to measure and guide the adjustment of the seat backrest 8. The seat backrest 8 rotates around its adjustment axis. To accurately measure the angle of the seat backrest 8, the origin of the angle measuring device is set to the projection of the seat backrest 8's adjustment axis onto the transparent plate 15.

[0067] In some embodiments, the test bench further includes a display device, which includes a controller 5 and a display circuit. Each grating sensor is connected to an input pin of the controller 5. The display circuit includes multiple sub-circuits corresponding to the first and second grating sensors. Each sub-circuit includes a control switch 6 and an indicator light 7 connected in series. The signal interface of the control switch 6 is connected to an output pin of the controller 5. The indicator light 7 includes a first light and a second light. The controller 5 controls the indication status of the indicator light 7 by the airbag deployment position signal and deployment time sent by the grating sensors.

[0068] The control switch 6 can use transistors, MOSFETs, relays, etc. The indicator light 7 indicates whether it is on or off, or displays different colors. For example, each sub-circuit can use a common-cathode RGB tri-color LED. The long-pin common cathode is grounded, and the three short-pin anodes (corresponding to red, green, and blue respectively) are connected to the PWM (duty cycle) output pin of the controller 5 through a protection resistor and the control switch 6. Different PWA signals output from the PWM output pin control the tri-color LED to display different colors. Alternatively, three sub-circuits can be set corresponding to the first and second grid lines of each transparent plate 15. Each sub-circuit uses a different colored LED, connected to the digital output pin of the controller 5 through a protection resistor and the control switch 6. The high and low level signals output from the pin control the on / off state of the corresponding LED, thus displaying different colors. This allows for direct display of the verification results of the airbag detonation test, providing a clear and reliable visual representation.

[0069] refer to Figure 7 As shown, the controller 5 includes at least one control unit 51. The controller 5 is electrically connected to the airbag detonation system. The control unit 51 includes a timing module 511 and two sets of control modules 512. The timing module 511 is used to record the airbag deployment time according to the airbag detonation trigger signal.

[0070] Each control module 512 includes:

[0071] The position receiving module 5121 is used to receive the airbag deployment position signal sent by the grating sensor;

[0072] The position comparison module 5122 is used to compare the received airbag deployment position signal sent by the grating sensor with a preset position threshold.

[0073] The position output module 5123 is used to output a signal indicating that the airbag has deployed to the correct position based on the comparison result of the position comparison module 5122.

[0074] The time comparison module 5124 is used to compare the airbag deployment time t with a preset time threshold.

[0075] The indicator output module 5125 is used to control the indication state of the indicator light 7 based on the comparison result of the time comparison module 5124.

[0076] For example, the first grid line extends along the X direction (the horizontal direction of the transparent plate 15), and the second grid line extends along the Z direction (the vertical direction of the transparent plate 15). The control module 512 includes an X-direction control module 512 and a Z-direction control module 512. The control switch 6 includes an X-direction control switch 6 and a Z-direction control switch 6. The indicator light 7 includes an X-direction light (first light) and a Z-direction light (second light). After the airbag is deployed, the X-direction grating sensor and the Z-direction grating sensor respectively collect the X-direction and Z-direction deployment position signals of the airbag. At the same time, the airbag deployment trigger signal triggers the timing module 511 to start timing. The X-direction and Z-direction deployment position signals of the airbag collected by the X-direction grating sensor and the Z-direction grating sensor are respectively sent to the corresponding position receiving module 5121. The position receiving module 5121 then sends the X-direction deployment position signal and the Z-direction deployment position signal to the corresponding position comparison module 5122. The X-axis position comparison module 5122 has a preset X-axis position threshold. When the X-axis deployment position first reaches the X-axis position threshold, the airbag is deployed in the X-axis direction. The Z-axis position comparison module 5122 has a preset Z-axis position threshold. When the Z-axis deployment position first reaches the Z-axis position threshold, the airbag is deployed in the Z-axis direction. The corresponding position output module 5123 outputs an airbag deployment completion signal, triggering the timing module 511 to record the X-axis deployment completion time and the Z-axis deployment completion time, respectively, and send them to the corresponding time comparison module 5124. The time comparison module 5124 has a preset time comparison threshold and compares the airbag deployment completion time t with the preset time threshold. The indication output module 5125 controls the opening and closing of the corresponding control switch 6 according to the time comparison result, thereby controlling the indication status of the indicator light 7.

[0077] The controller 5 may include multiple control units 51 corresponding to the rectangular subspaces. When multiple airbags are detonated simultaneously, the controller 51 controls the indicator lights 7 to indicate the qualified status of each airbag. Alternatively, the controller 51 may include a single control unit 51. After adjusting the position of each rectangular subspace, the controller detonates each airbag one by one and controls the indicator lights 7 to indicate the qualified status of each airbag in sequence.

[0078] In one embodiment, the time thresholds preset in the time comparison module 5124 include a first time threshold T1 and a second time threshold T2. When the airbag deployment time t ≤ the first time threshold T1, it indicates that the airbag deployment time is relatively fast and the airbag deployment time is qualified, and the indicator light 7 displays a first color, for example, green. When the first time threshold T1 < the airbag deployment time t ≤ the second time threshold T2, it indicates that the airbag deployment time is relatively slow and the airbag deployment time is unqualified, and the indicator light 7 displays a second color, for example, yellow, as a warning. When the airbag deployment time t > the second time threshold T2, it indicates that the airbag deployment time is extremely slow and the airbag deployment time is unqualified, and the indicator light 7 displays a third color, for example, red, as an alarm. Based on the time it takes for the airbag to deploy to the predetermined position, the indicator light 7 directly displays different colors to distinguish whether the verification result is qualified, which is intuitive and clear.

[0079] The first time threshold T1 and the second time threshold T2 are set according to the operating conditions specified in the "TL82380 Side Airbag Subsystem Test". For example, when a side airbag is tested at a high temperature of 85℃, the time for the airbag to first reach the preset X-direction position threshold -250 in the X direction is 14ms, and the time for the airbag to first reach the preset Z-direction position threshold 500 in the Z direction is 16ms. If the first time threshold T1 is set to 14ms and the second time threshold T2 is set to 15ms, and the airbag's X-direction deployment time is equal to the first time threshold T1, the X-direction indicator 7 will display green, indicating that the airbag's X-direction deployment time is qualified; if the Z-direction deployment time is greater than the second time threshold T2, the Z-direction indicator 7 will display red, indicating that the airbag's Z-direction deployment time is unqualified.

[0080] The test bench also includes an airbag deployment system connected to each airbag under test, used to deploy each airbag. Image acquisition device 2, lighting system, and controller 5 can be integrated into the airbag deployment system. The system triggers deployment signals for each airbag, controlling its deployment and simultaneously triggering image acquisition device 2 to capture images and timing module 511 to time the event. The airbag deployment system can be a commonly used system; for example, the SureFire airbag deployment test system from Microsys can be used.

[0081] 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 batch testing bench for automotive seat airbags, characterized in that, The system includes a frame structure and image acquisition equipment. The frame structure comprises an upper frame and a base plate, as well as multiple columns connecting the upper frame and the base plate. The frame structure encloses a receiving space, which is divided into multiple rectangular sub-spaces by partitions. Each rectangular sub-space has at least a first outer side and a second outer side that overlap with the outer side of the receiving space. Each rectangular sub-space is equipped with a clamping device for clamping a seat back. The clamping devices of adjacent rectangular sub-spaces ensure that the planes containing the corresponding adjacent seat back sides are perpendicular, parallel, or coplanar. At least one of the first and second outer sides of each rectangular sub-space is provided with a transparent plate located on the side of the seat back, used to simulate a door panel. The transparent plate located on the side of the seat back has perpendicular first and second grid lines, and each grid line is equipped with a grating sensor for... At the airbag deployment position, a grating sensor corresponding to the first grid line is set as the first grating sensor, and a grating sensor corresponding to the second grid line is set as the second grating sensor; the image acquisition device includes a first image acquisition device and a second image acquisition device, the first image acquisition device and the second image acquisition device respectively facing the first outer side and the second outer side of at least one rectangular subspace; the image acquisition device includes at least one set, each set of image acquisition devices includes a first image acquisition device and a second image acquisition device disposed in the same rectangular subspace; the rectangular subspace includes three or four, the test bench also includes a rotating device, the rotating device includes a base, the base is provided with a connecting hole in the middle; a rotating shaft is fixedly disposed in the middle of the base plate, the rotating shaft passes through the connecting hole and can rotate in the connecting hole.

2. The batch testing bench for automotive seat airbags according to claim 1, characterized in that, The outer side facing the front of the seat back is set as an opening on the first and second outer sides of each rectangular subspace.

3. The batch testing bench for automotive seat airbags according to claim 1, characterized in that, The partition includes a mosaic panel.

4. The batch testing bench for automotive seat airbags according to claim 1 or 2, characterized in that, The clamping device includes a slide rail fixedly mounted on the base plate, the extension direction of which is perpendicular to the plane of the transparent plate; a first clamping plate is provided on the slide rail and slidably connected to it; a second clamping plate is fixedly mounted on the end of the slide rail away from the transparent plate; a threaded rod adapted to the fixing hole of the adjusting plate of the seat back is provided on the side opposite to the first and second clamping plates; the slide rails of adjacent rectangular subspaces are arranged vertically or parallel.

5. The batch testing bench for automotive seat airbags according to claim 4, characterized in that, When the slide rails of adjacent rectangular subspaces are set in parallel, the image acquisition device is set to two sets corresponding to the two rectangular subspaces opposite to the side of the seat back. The partition between the two rectangular subspaces opposite to the side of the seat back is detachably set in the frame structure.

6. The batch testing bench for automotive seat airbags according to claim 4, characterized in that, When the slide rails of adjacent rectangular subspaces are set in parallel, the image acquisition device also includes a first image acquisition device set on the side of the seat back facing the side of the adjacent rectangular subspaces; the partition between the two rectangular subspaces facing the side of the seat back is detachably set on the frame structure.

7. The batch testing bench for automotive seat airbags according to claim 1, characterized in that, The base plate is provided with a locking pin, and the base is provided with multiple locking holes, each locking hole being arranged around the circumference with its center located on the axis of rotation.

8. The batch testing bench for automotive seat airbags according to claim 1, characterized in that, The rotating device also includes a drive motor, and the rotating shaft passes through a connecting hole and is connected to the output shaft of the drive motor; the control panel of the drive motor is located outside the environmental chamber.

9. The batch testing bench for automotive seat airbags according to claim 1, characterized in that, The transparent plate is equipped with an angle measuring device, and the origin of the angle measuring device is set as the projection of the seat back adjustment axis onto the transparent plate.

10. The batch testing bench for automotive seat airbags according to claim 1, characterized in that, The test bench also includes a display device, which includes a controller and a display circuit. Each grating sensor is connected to an input pin of the controller. The display circuit includes multiple sub-circuits corresponding to the first and second grating sensors. Each sub-circuit includes a control switch and an indicator light connected in series. The signal interface of the control switch is connected to an output pin of the controller. The indicator light includes a first light and a second light. The controller controls the indicator light status based on the airbag deployment position signal and deployment time sent by the grating sensors.

11. The batch testing bench for automotive seat airbags according to claim 10, characterized in that, The controller includes at least one control unit, which is electrically connected to the airbag deployment system. The control unit includes a timing module and two sets of control modules. The timing module is used to record the airbag deployment time according to the airbag deployment trigger signal. Each control module group includes: The position receiving module is used to receive the airbag deployment position signal sent by the grating sensor; The position comparison module is used to compare the airbag deployment position signal sent by the received grating sensor with a preset position threshold. The position output module is used to output a signal indicating that the airbag has deployed to the correct position based on the comparison result from the position comparison module. The time comparison module is used to compare the airbag deployment time t with a preset time threshold. The indicator output module is used to control the indicator status of the indicator light based on the comparison result of the time comparison module.

12. The batch testing bench for automotive seat airbags according to claim 11, characterized in that, The time comparison module has preset time thresholds including a first time threshold T1 and a second time threshold T2. When the airbag deployment time t ≤ the first time threshold T1, the indicator light displays a first color; when the first time threshold T1 < the airbag deployment time t ≤ the second time threshold T2, the indicator light displays a second color; and when the airbag deployment time t > the second time threshold T2, the indicator light displays a third color.

13. The batch testing bench for automotive seat airbags according to claim 1, characterized in that, The test bench also includes an airbag detonation system, which is connected to each airbag under test and is used to detonate each airbag under test.

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