Automobile seat air bag batch test bench

Abstract

The invention discloses a batch test bed for automobile seat air bags. The batch test bed comprises a frame structure and image acquisition equipment, a containing space is defined by the frame structure and divided into a plurality of rectangular subspaces through partition plates. Each rectangular subspace is provided with a clamping device used for clamping a seat backrest; at least one of the first outer side face and the second outer side face of each rectangular subspace is provided with a transparent plate located on the side face of a seat backrest and used for simulating a door protection plate. A first grid line and a second grid line which are perpendicular to each other are arranged on the transparent plate, and each grid line is provided with a grating sensor; the image acquisition equipment comprises a first image acquisition device and a second image acquisition device which face the first outer side face and the second outer side face respectively. The test bed has the advantages that a plurality of seat backrests can be installed under one working condition, batch tests can be carried out under one working condition, a seat air bag development acceptance matrix can be rapidly completed in batches, and the test efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to a batch test bench for automobile seat airbags. Background Art

[0002] During the automotive seat development process, the performance of seat airbags is crucial to protecting occupants in the event of an accident. Therefore, seat manufacturers and OEMs must conduct multiple rounds of validation tests under various temperature conditions before officially releasing a vehicle to market to test the stability of the seat airbag system. For example, powder charge validation tests include high-limit airbag testing at high temperature (85°C), high-limit airbag testing at low temperature (-35°C), low-limit airbag testing at high temperature (85°C), low-limit airbag testing at low temperature (-35°C), normal-limit airbag testing at high temperature (85°C), normal-limit airbag testing at low temperature (-35°C), and normal-limit airbag testing at room temperature (23°C). The industry typically uses vehicle-specific test fixtures and the traditional single-test method under a single operating condition for validation. This method results in low test efficiency, long cycle times, high energy consumption, and high testing costs in the seat airbag approval matrix test, hindering vehicle development progress. Summary of the Invention

[0003] In order to solve at least one of the above technical problems, the present invention provides a car seat airbag batch test bench, which is provided with multiple rectangular subspaces, each of which can be equipped with a seat back for airbag detonation test, thereby realizing batch testing of airbags.

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

[0005] A vehicle seat airbag batch test bench comprises a frame structure and an image acquisition device; the frame structure comprises an upper frame and a bottom plate, and a plurality of upright posts for connecting the upper frame and the bottom plate; the frame structure encloses a accommodating space, the accommodating space being divided into a plurality of rectangular subspaces by partitions, each rectangular subspace having at least a first outer side surface and a second outer side surface overlapping with the outer side surface of the accommodating space; each rectangular subspace is provided with a clamping device for clamping a seat back; at least one of the first outer side surface and the second outer side surface of each rectangular subspace is provided with a transparent plate located on the side surface of the seat back for simulating a door guard plate; first and second grid lines, which are perpendicular to each other, are provided on the transparent plate located on the side surface of the seat back, each grid line being provided with a grating sensor for acquiring the deployment position of the airbag; the grating sensor corresponding to the first grid line is provided as a first grating sensor, and the grating sensor corresponding to the second grid line is provided as a second grating sensor; the image acquisition device comprises 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 surface and the second outer side surface of at least one rectangular subspace.

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

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

[0008] Furthermore, the partition includes a mosaic plate, which is conducive to image acquisition by a high-speed camera.

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

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

[0011] Furthermore, when the slide rails of adjacent rectangular subspaces are arranged in parallel, the image acquisition equipment is arranged into two groups corresponding to the two rectangular subspaces opposite to the side surfaces of the seat back, and the partition between the two rectangular subspaces opposite to the side surfaces of the seat back is detachably arranged on the frame structure, which can be used for remote airbag detonation tests.

[0012] Furthermore, the image acquisition device includes at least one group, each group of image acquisition devices includes a first image acquisition device and a second image acquisition device arranged in the same rectangular subspace, and a first image acquisition device arranged in adjacent rectangular subspaces opposite to each other on the side of the seat back and facing the side of the seat back; the slide rails of each rectangular subspace are arranged in parallel; the partition between two rectangular subspaces opposite to each other on the side of the seat back is detachably arranged on the frame structure, which can be used for remote airbag detonation testing.

[0013] Furthermore, when the rectangular subspaces include 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 provided in the middle of the bottom plate, and 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 bottom plate, and a plurality of locking holes are provided on the base. Each locking hole is arranged along a circle with the center located on the axis of the rotating shaft, and can lock the position of the bottom plate.

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

[0016] Furthermore, the transparent plate is provided with an angle measuring device, the origin of the angle measuring device is set as the projection of the seat back adjustment axis on the transparent plate, and guides the seat back adjustment angle.

[0017] Furthermore, the test bench also includes a display device, which includes a controller and a display circuit, and each grating sensor is connected to an input pin of the controller; the display circuit includes a plurality of sub-circuits arranged corresponding to the first grating sensor and the second grating sensor, each of the sub-circuits includes a control switch and an indicator light arranged in series, the signal interface of the control switch is connected to an output pin of the controller, and the indicator light includes a first light and a second light; the controller can display the verification result of the airbag detonation test by controlling the indication status of the indicator light through the airbag deployment position signal and deployment time sent by the grating sensor.

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

[0019] Each control module includes:

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

[0021] a position comparison module, configured to compare the airbag deployment position signal received from the grating sensor with a preset position threshold;

[0022] The position output module is used to output the airbag deployment signal according to the comparison result of the position comparison module;

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

[0024] The indication output module is used to control the indication state of the indicator light according to the comparison result of the time comparison module.

[0025] Furthermore, the time thresholds pre-set 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; when the airbag deployment time t>the second time threshold T2, the indicator light displays a third color. The indicator lights display 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 to be tested and is used to detonate each airbag to be tested.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The test bench includes multiple rectangular subspaces, each of which can be used to fix the seat back position through a clamping device. The test bench can install multiple seat backs under one working condition, and can conduct batch tests under one working condition, quickly completing the seat airbag development approval matrix in batches, improving test efficiency, shortening the component test cycle and vehicle model development cycle, ensuring the progress of vehicle approval, and reducing test costs and vehicle model development costs.

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

[0030] (3) The test bench can be equipped with only one set of image acquisition devices. The position of each rectangular subspace can be adjusted by the rotating device, so that the rectangular subspace where each airbag to be tested is located can be rotated to the position of the image acquisition device, meeting the needs of different positions and saving costs while realizing batch testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To better understand the above and other objects, features, advantages, and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. Like reference numerals in the accompanying drawings refer to like components. Those skilled in the art should understand that the accompanying drawings are intended to schematically illustrate preferred embodiments of the present invention and have no limiting effect on the scope of the present invention. The components in the drawings are not drawn to scale.

[0032] Figure 1 This is a structural schematic diagram of the automobile seat airbag batch test bench of the present invention.

[0033] Figure 2 Schematic diagram of the rectangular subspace arrangement of the present invention.

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

[0035] Figure 4 A schematic structural diagram of an embodiment of the image acquisition device of the present invention.

[0036] Figure 5 A schematic structural diagram of another embodiment of the image acquisition device of the present invention.

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

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

[0039] In the figure: 1. Frame structure; 11. Upper frame; 12. Bottom plate; 13. Upright column; 14. Partition plate; 15. Transparent plate; 16. Through hole; 17. Universal wheel; 2. Image acquisition device; 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. Long hole; 4. Rotating device; 41. Base; 411. Connecting hole; 42. Lower tray ; 421. Avoidance 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. Indication output module; 6. Control switch; 7. Indicator light; 8. Seat back. DETAILED DESCRIPTION

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

[0041] In the description of the present invention, it should be noted that the term "including" and its variations represent open inclusion, that is, "including but not limited to". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "and / or" when used to list two or more items means that any one of the listed items can be used, or any combination of two or more of the listed items can be used. In addition, in the description of the present invention, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0042] The present invention provides a vehicle seat airbag batch test bench, such as Figure 1 As shown, it includes a frame structure 1 and an image acquisition device 2; the frame structure 1 includes an upper frame 11 and a bottom plate 12, and a plurality of columns 13 for connecting the upper frame 11 and the bottom plate 12; the frame structure 1 encloses a storage space, which is divided into a plurality of rectangular subspaces by a partition 14, each rectangular subspace having at least a first outer side surface and a second outer side surface overlapping the outer side surface of the storage space; each rectangular subspace is provided with a clamping device 3 for clamping the seat back 8; at least one of the first outer side surface and the second outer side surface of each rectangular subspace is provided with a transparent plate 15 located on the side of the seat back 8 for simulating a door guard; the transparent plate 15 located on the side of the seat back 8 is provided with first and second grid lines perpendicular to each other, and each grid line is provided with a grating sensor for acquiring the deployment position of the airbag; 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, the first image acquisition device and the second image acquisition device are respectively oriented towards the first outer side surface and the second outer side surface of at least one rectangular subspace.

[0043] The upper frame 11 and columns 13 can be made of 50*50mm profiles, which are low-cost and lightweight. The base plate 12 can be made of rectangular steel plates. At least four columns 13 are provided to connect the upper frame 11 and base plate 12. The transparent plate 15 can be a 10mm thick organic glass plate to simulate a car door guard. Organic glass has a high degree of transparency, which allows high-speed video to more clearly capture the side deployment of the seat airbag. Organic glass has high mechanical strength and is not easily shattered by the impact of the airbag. It can also withstand high and low temperatures, and performs better in airbag detonation test environments (-35°C, 85°C). The first and second image acquisition devices can use high-speed cameras or high-speed video cameras (at least 2000 frames / s). To clearly capture images, the image acquisition device 2 is equipped with a corresponding lighting system. Exemplarily, the first outer side surface is located on the side of the seat back 8, and the first image acquisition device facing the first outer side surface can record the side deployment shape of the airbag. The second outer side surface faces the front of the seat back 8, and the second image acquisition device facing the second outer side surface can record the front deployment shape of the airbag.

[0044] The first and second grid lines can be arranged as straight lines extending horizontally and vertically along the transparent plate 15, respectively. The horizontal and vertical grid lines intersect to form a coordinate grid. During airbag deployment, light is blocked, allowing grating sensors positioned along each grid line to detect the airbag's deployment position. The first and second grid lines can be drawn or etched directly onto the plexiglass plate, with the spacing between adjacent grid lines set to 10 mm. Alternatively, a laser projection angle meter can be used to generate an electronic digital display of the grid lines.

[0045] During testing, each seat back 8 is secured to each rectangular subspace using a clamping device 3. According to "GB / T38795-2020 Performance Requirements for Side and Curtain Airbag Modules of Automobiles," after the environmental chamber reaches the set temperatures (-35°C, 23°C, and 85°C), multiple seat airbags can be deployed under the same operating conditions. This enables batch testing of airbags, allowing for rapid completion of the seat airbag development and 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 backs 8 can be either actual vehicle seat backs or dummy seat backs. Compared to full-vehicle testing, this test bench allows for batch airbag deployment testing while occupying less space, allowing the use of a smaller environmental chamber and further saving energy.

[0046] In some embodiments, the rectangular subspaces include two, three or four. Figure 2 As shown, when there are two rectangular subspaces, the upper frame 11 forms a square (U) shape, enabling two seat airbags to be tested under the same operating conditions. When there are three rectangular subspaces, the upper frame 11 forms an L shape, enabling three seat airbags to be tested under the same operating conditions. When there are four rectangular subspaces, the upper frame 11 forms a square (T-shaped) shape, enabling four seat airbags to be tested under the same operating conditions. Depending on the number of image acquisition devices 2 installed and the environmental chamber temperature, single or simultaneous seat airbag detonation can be performed.

[0047] Preferably, one of the first and second outer sides of each rectangular subspace facing the front of the seat back 8 is provided with a through opening 16. No transparent plate 15 is provided at the through opening 16, and the seat back 8 can be placed into the rectangular subspace through the through opening 16 for installation and adjustment.

[0048] Preferably, the partition 14 comprises a mosaic board. The mosaic board can serve as the bottom plate 12 for high-speed photography, helping the high-speed camera to more clearly capture the overall state of the test process. The color of the mosaic board can be red and black, yellow and black, or other colors that are conducive to image acquisition.

[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 slide rail 31 extends 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 the slide rail 31. A sliding groove compatible with the slide rail 31 can be provided at the bottom of the first clamping plate 32, so that the first clamping plate 32 can 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 flange structure and fixed to the base plate 12 by bolts passing through the flange. Threaded rods 34 are provided on opposite sides of the first clamping plate 32 and the second clamping plate 33, which are compatible with the fixing holes of the recliner connecting plate of the seat back 8. Generally, the fixing holes of the recliner connecting plate of the seat back 8 are two through holes. Accordingly, two threaded rods 34 are provided on the first clamping plate 32 and the second clamping plate 33.

[0050] When installing the seat back 8, position the front of the seat back 8 toward the opening, with one side of the seat back 8 pressed against the second clamping plate 33. Insert the threaded rod 34 on the second clamping plate 33 into the fixing hole of the recliner connecting plate and secure it with a nut. Then, move the first clamping plate 32 so that it presses against the other side of the seat back 8. Insert the threaded rod 34 on the first clamping plate 32 into the fixing hole on the other side of the seat back 8 and secure it with a nut. This secures the seat back 8 to the clamping device 3. The seat back 8 can then be adjusted to the desired angle. The threaded rod 34 can be connected to the two clamping plates via a connecting plate 36. The connecting plate 36 is secured to the clamping plates using 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 elongated holes 361 extending in a direction that aligns with the extending direction of the connecting line between the two fixing holes of the recliner connecting plate. At least one threaded rod 34 on each clamping plate is detachably connected to the clamping plate. When securing the seat back 8, the elongated holes 361 are aligned with the fixing holes of the recliner connecting plate, and the threaded rod 34 is passed through the two elongated holes 361 and the fixing holes and fastened with a nut. In this way, the threaded rod 34 can be moved along the elongated holes 361, and the distance between the two threaded rods 34 can be adjusted to accommodate recliner connecting plates of different specifications. The distance between the second clamping plate 33 and the transparent plate 15 can be adjusted to match the distance between the side of the seat facing away from the door guard plate and the door guard plate, for example, it can be set to approximately 80-120 mm. The distance between the first clamping plate 32 and the second clamping plate 33 of the clamping device 3 is adjustable, making the clamping device 3 suitable 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 is threadedly connected to the lead screw 35. The first end of the lead screw 35 can abut the second clamping plate 33, or a through hole or threaded hole can be provided in the second clamping plate 33, 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 to save effort.

[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 arranged in the same rectangular subspace. Figure 2 As shown, depending on the arrangement of the rectangular subspaces, the image acquisition devices 2 can be arranged in one, two, three, or four groups. When the number of image acquisition devices 2 is greater than or equal to the number of rectangular subspaces where the seat backs 8 to be tested are installed, the airbag deployment status of each rectangular subspace after detonation can be simultaneously captured. When the number of image acquisition devices 2 is less than the number of rectangular subspaces where the seat backs 8 to be tested are installed, the positions of the rectangular subspaces can be adjusted under the same operating conditions so that each rectangular subspace containing the seat backs 8 to be tested faces the image acquisition devices 2, allowing detonation tests to be performed on each airbag one by one.

[0053] refer to Figure 2 As shown in FIG. a, when the rectangular subspaces are set to two AB, the image acquisition device 2 is preferably set to two groups, which can capture the deployment state of the two airbags after detonation. Figure 2 As shown in Figure b, when the rectangular subspaces are set to ABC, the image acquisition devices 2 are set to one group, two groups or three groups. Figure 2 As shown in Figure c, when the rectangular subspaces are set to four ABCD, the image acquisition devices 2 are set to one group, two groups, three groups or four groups.

[0054] When the test bench of this embodiment is used for seat side airbag detonation test, the slide rails 31 of adjacent rectangular subspaces can be arranged vertically or in parallel. When the slide rails 31 of adjacent rectangular subspaces are arranged vertically, the planes of the side surfaces of adjacent seat backs 8 are perpendicular, and the openings 16 are arranged between the transparent plates 15, as shown in FIG. Figure 4 When the slide rails 31 of adjacent rectangular subspaces are arranged in parallel, the planes of the adjacent seat backs 8 are parallel or coplanar, and the adjacent transparent plates 15 are arranged in parallel or coplanar, as shown. Figure 2 As shown in Figure c.

[0055] Seats are relatively important components in the car's restraint system. With the development of intelligent automobiles in the past two years, many humanized equipment has been added to the seats, improving the comfort and sense of security of the passengers. For example, some car seats are equipped with remote airbags. The remote airbags are located between the front passengers. When the vehicle is involved in a side collision, they can prevent the front passengers' bodies from colliding with each other and causing injuries, and can effectively protect 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 arranged in two groups corresponding to two rectangular subspaces on opposite sides of the seat back 8. The partition 14 between the two rectangular subspaces on opposite sides of the seat back 8 is removably provided on the frame structure 1. For example, the partition 14 is connected to the upper frame 11 and / or the bottom plate 12 via a sliding fit on a slide rail. Removing the partition 14 between the two rectangular subspaces also allows for a distal airbag detonation test. When testing the distal airbag, the partition 14 is pulled out; when testing the side airbag, the partition 14 is pushed in between the two rectangular subspaces.

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

[0058] It is understandable that the distal airbag and the side airbags located in the two rectangular subspaces cannot be detonated at the same time to avoid the side airbags blocking the side of the distal airbag, causing interference with the signal collected by the grating sensor and the image collected by the high-speed camera.

[0059] In some embodiments, the image acquisition device 2 includes at least one group, each group of image acquisition devices 2 includes a first image acquisition device and a second image acquisition device arranged in the same rectangular subspace, and a first image acquisition device arranged in an adjacent rectangular subspace opposite to the side of the seat back 8 and facing the side of the seat back 8; the slide rails 31 of each rectangular subspace are arranged in parallel. Figure 5As shown, depending on the arrangement of the rectangular subspaces, the image acquisition devices 2 can be arranged in one or two groups. The partition 14 between the two rectangular subspaces on the sides of the seat back 8 is detachably mounted on the frame structure 1. The test bench of this embodiment can be used for both side airbag detonation tests and distal airbag detonation tests. When testing the distal airbag, the partition 14 is pulled out, and when testing the side airbag, the partition 14 is pushed in between the two rectangular subspaces. Compared to arranging the image acquisition devices 2 in two groups corresponding to the two 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 distal airbag, the driver's seat back 8 is installed in space A and the co-pilot seat back 8 is installed in space B, and the distal airbag is deployed between the two seat backs 8. Since the partition 14 between space A and space B is removed, the grating sensor set on the transparent plate 15 of space A and / or space B can collect the distal airbag deployment position, the 1# and / or 3# high-speed cameras can collect the side deployment status of the distal airbag, and the 2# high-speed camera can collect the front deployment status of the distal airbag.

[0061] In some embodiments, when the rectangular subspaces include three or four, the test bench further includes a rotating device 4. Figure 6 As shown, the rotating device 4 includes a base 41 with a connection hole 411 in the center. A rotating shaft 431 is fixedly mounted in the center of the base plate 12. The rotating shaft 431 passes through the connection hole 411 and can rotate within it. The base 41, which can be made of 10 mm thick steel plate, serves as the foundation of the entire test bench. To ensure a more stable connection between the rotating shaft 431 and the base 41, a lower tray 42 with a clearance hole 421 in the center can be fixedly mounted on the top of the base 41. An upper tray 43 is fixedly mounted on the bottom of the base plate 12, with the rotating shaft 431 fixedly mounted in the center of the upper tray 43. After the rotating shaft 431 passes through the clearance hole 421 and the connection hole 411, an end plate 432 restrains the rotating shaft 431 in the connection hole 411 to prevent it from falling out. As the rotating shaft 431 rotates in the connection hole 411, the base plate 12 can rotate about the axis of the rotating shaft 431, adjusting the position of each rectangular subspace. In order to make the bottom plate 12 rotate smoothly and effortlessly, the rotating shaft 431 can be connected to the base 41 through a bearing, the outer ring of the bearing is connected to the connecting hole 411 through an interference fit, and the inner ring of the bearing is connected to the rotating shaft 431 through an interference fit. The bottom of the base 41 can also be installed with a universal wheel 17 to achieve free movement of the test bench position.

[0062] In this embodiment, the image acquisition device 2 can be set as a group to minimize the number of image acquisition devices 2 and save costs. Pushing the column 13 can push the bottom plate 12 to rotate around the axis of the rotation shaft 431, thereby adjusting the position of each rectangular subspace, rotating the rectangular subspace where the airbag to be tested is located to the position of the image acquisition device 2, and then detonating the airbag, so that the airbags located in each rectangular subspace are detonated one by one. For example, referring to Figure 2 As shown in Figure c, after the airbag in space A is detonated, the bottom plate 12 is rotated 90° counterclockwise, and space B can be rotated to the position of image acquisition device 2. The bottom plate 12 is then rotated 90° counterclockwise, and space C can be rotated to the position of image acquisition device 2. The bottom plate 12 is then rotated 90° counterclockwise, and space D can be rotated to the position of image acquisition device 2. In this way, under the same working condition, the airbags in the four rectangular subspaces can be detonated in sequence. After the environmental chamber meets the test requirements, batch tests can be carried out. Compared with only conducting a single airbag detonation test under one working condition, a large amount of test time and energy consumption can be saved.

[0063] It can be understood that the rectangular subspace includes a square subspace and a rectangular subspace. When the rectangular subspace is set to a rectangular subspace, the length and width of the rectangular subspace are set so 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 outer side surface and the second outer side surface of the rectangular subspace are still facing the first image acquisition device and the second image acquisition device.

[0064] To prevent frame rotation during airbag deployment and maintain stable high-speed camera coverage of the airbag deployment, a locking pin 44 can be installed on the base plate 12. Multiple locking holes 422 can be provided on the base 41, each arranged along a circumference with its center located on the axis of the rotating shaft 431. Preferably, the locking holes 422 can be located on the lower tray 42 of the base 41, with at least four locking holes 422 evenly spaced along the circumference, allowing the base plate 12 to rotate 90°, 180°, 270°, and 360°. During testing at room temperature (23°C), an operator can manually adjust the position of each rectangular subspace in the environmental chamber and then lock the base plate 12 in place 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 desired position, thereby rotating the rectangular subspace of the seat back 8 to the desired position. Then release the locking pin 44, through the force of the return spring, the locking pin 44 can be inserted into the locking hole 422 of the base 41 for locking. The locking pin 44 can be arranged at a position near a through opening 16 of the base plate 12 for easy operation.

[0065] In some embodiments, the rotating device 4 further includes a drive motor. The rotating shaft 431 passes through the connecting hole 411 and is connected to the output shaft of the drive motor. A control panel for the drive motor is located outside the environmental chamber. The drive motor can be placed on the floor of the environmental chamber or mounted on the base 41 so that it moves with the base 41. The rotating shaft 431 passes through the connecting hole 411 and is connected to the output shaft of the drive motor via a coupling. When the drive motor is operating, the rotating shaft 431 rotates. The control panel for the drive motor is located outside the environmental chamber via a cable. During high and low temperature environment testing (-35°C and 85°C), an operator operating the control panel outside the environmental chamber can 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 plexiglass plate with a resolution of 1° to guide the adjustment of the seat back 8 between 0 and 90°, ensuring that the angle between the seat back 8 and the horizontal or vertical direction meets the requirements of "TL82380 Side Airbag Subsystem Test." Alternatively, a laser projection goniometer can be used to indicate the desired angle of the seat back 8. The desired angle is entered into the laser projection goniometer, and the laser beam creates a corresponding angle line on the plexiglass plate. Alternatively, an angle gauge, universal angle ruler, or other device can be used to measure and guide the angle of the seat back 8. The seat back 8 rotates about its adjustment axis. To accurately measure the angle of the seat back 8, the origin of the angle measuring device is set to the projection of the seat back 8's adjustment axis onto the transparent plate 15.

[0067] In some embodiments, the test bench also 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 a plurality of sub-circuits corresponding to the first grating sensor and the second grating sensor, each of the sub-circuits includes a control switch 6 and an indicator light 7 arranged in series, the signal interface of the control switch 6 is connected to an output pin of the controller 5, and the indicator light 7 includes a first light and a second light; the controller 5 controls the indication state of the indicator light 7 through the airbag deployment position signal and its deployment time sent by the grating sensor.

[0068] The control switch 6 can be a transistor, MOS transistor, relay, or the like. The indicator light 7 indicates the status of the indicator light 7, including whether it is on or off, or displays different colors. For example, each sub-circuit can utilize a common-cathode RGB LED. The long pin's common cathode is grounded, and the three short pins' anodes (corresponding to red, green, and blue, respectively) are connected to the PWM (duty cycle) output pins of the controller 5 via a protective resistor and a control switch 6. The three-color LED is controlled to display different colors based on the different PWA signals output by the PWM output pins. Alternatively, three sub-circuits can be provided corresponding to the first and second grid lines of each transparent plate 15. Each sub-circuit utilizes an LED bead of a different color. These are connected to a digital output pin of the controller 5 via a protective resistor and a control switch 6. The corresponding LED bead is controlled to light up or off based on the high and low level signals output by the pins, thereby displaying different colors. This allows for direct and reliable display of the verification results of the airbag deployment test.

[0069] refer to Figure 7 As shown, the controller 5 includes at least one control unit 51, which is electrically connected to the airbag detonation system. The control unit 51 includes a timing module 511 and two groups 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] a position comparison module 5122 for comparing the airbag deployment position signal received from the grating sensor with a preset position threshold;

[0073] The position output module 5123 is used to output an airbag deployment arrival signal according to the comparison result of the position comparison module 5122;

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

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

[0076] Exemplarily, the first grid lines extend along the X-direction (horizontally of the transparent plate 15), and the second grid lines extend along the Z-direction (vertically 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 (a first light) and a Z-direction light (a second light). After the airbag is deployed, the X-direction grating sensor and the Z-direction grating sensor respectively collect the airbag's X-direction and Z-direction deployment position signals. Simultaneously, the airbag deployment trigger signal triggers the timing module 511 to start the timing. The X-direction and Z-direction deployment position signals collected by the X-direction and Z-direction grating sensors are respectively transmitted to the corresponding position receiving module 5121. The position receiving module 5121 then transmits the X-direction and Z-direction deployment position signals to the corresponding position comparison module 5122. The X-axis position comparison module 5122 is pre-set with an X-axis position threshold. When the X-axis deployment position reaches the X-axis position threshold for the first time, the airbag is fully deployed in the X-axis. The Z-axis position comparison module 5122 is pre-set with a Z-axis position threshold. When the Z-axis deployment position reaches the Z-axis position threshold for the first time, the airbag is fully deployed in the Z-axis. 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 is pre-set with a time comparison threshold and compares the airbag deployment completion time t with the pre-set time threshold. The indication output module 5125 controls the opening and closing of the corresponding control switch 6 based on 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 at the same time, the indicator lights 7 are controlled to indicate the qualified status of each airbag respectively; it may also include a control unit 51, which adjusts the position of each rectangular subspace and then detonates each airbag one by one, and controls the indicator lights 7 to indicate the qualified status of each airbag in turn.

[0078] In one embodiment, the time thresholds pre-set 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, 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, 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, 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 a warning. 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 subjected to a high-temperature detonation test at 85°C, the time it takes for the airbag to first reach the preset X-direction position threshold of -250° in the X-direction is 14ms, and the time it takes for the airbag to first reach the preset Z-direction position threshold of 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, if the airbag's X-direction deployment time is equal to the first time threshold T1, the X-direction indicator light 7 will turn green, indicating a satisfactory X-direction deployment time. If the Z-direction deployment time is greater than the second time threshold T2, the Z-direction indicator light 7 will turn red, indicating a satisfactory Z-direction deployment time.

[0080] The test bench also includes an airbag deployment system, connected to each airbag under test and used to deploy it. The image capture device 2, lighting system, and controller 5 can be integrated into the airbag deployment system. The airbag deployment system triggers deployment signals for each airbag, controlling airbag deployment after deployment, while also triggering the image capture device 2 to capture images and the timing module 511 to set a timer. The airbag deployment system can be a commonly used deployment system, such as the SureFire airbag deployment test system from Microsys.

[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 in the scope of protection of the present invention.

Claims

1. A car seat airbag batch test bench, characterized in that: It comprises a frame structure and an image acquisition device; the frame structure comprises an upper frame and a bottom plate, and a plurality of columns for connecting the upper frame and the bottom plate, the frame structure encloses a storage space, the storage space is divided into a plurality of rectangular subspaces by partitions, each rectangular subspace has at least a first outer side surface and a second outer side surface overlapping with the outer side surface of the storage space; each rectangular subspace is provided with a clamping device for clamping the seat back; at least one of the first outer side surface and the second outer side surface of each rectangular subspace is provided with a transparent plate located on the side surface of the seat back for simulating a door guard plate; the transparent plate located on the side surface of the seat back is provided with first and second grid lines perpendicular to each other, each grid line is provided with a grating sensor for acquiring the deployment position of the airbag, 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 comprises a first image acquisition device and a second image acquisition device, the first image acquisition device and the second image acquisition device are respectively facing the first outer side surface and the second outer side surface of at least one rectangular subspace.

2. The automobile seat airbag batch test bench according to claim 1, characterized in that: The rectangular subspaces include two, three or four.

3. The automobile seat airbag batch test bench according to claim 1, characterized in that: An outer side facing the front side of the seat back is provided as a through opening among the first outer side and the second outer side of each rectangular subspace.

4. The automobile seat airbag batch test bench according to claim 1, characterized in that: The partition includes a mosaic panel.

5. The automobile seat airbag batch test bench according to claim 1 or 3, characterized in that: The clamping device includes a slide rail fixedly arranged on the base plate, and the extension direction of the slide rail is perpendicular to the plane where the transparent plate is located; a first clamping plate is provided on the slide rail and is slidably connected to the slide rail, and a second clamping plate is fixedly provided on the end of the slide rail away from the transparent plate, and a threaded rod is provided on the opposite side of the first clamping plate and the second clamping plate, which is adapted to the fixing hole of the seat back adjuster connecting plate.

6. The automobile seat airbag batch test bench according to claim 2, characterized in that: The image acquisition device comprises at least one group, each group of image acquisition devices comprises a first image acquisition device and a second image acquisition device arranged in the same rectangular subspace, and the slide rails of adjacent rectangular subspaces are arranged vertically or in parallel.

7. The vehicle seat airbag batch test bench according to claim 6, characterized in that: When the slide rails of adjacent rectangular subspaces are arranged in parallel, the image acquisition equipment is arranged in two groups corresponding to the two rectangular subspaces opposite to the side surfaces of the seat back, and the partition between the two rectangular subspaces opposite to the side surfaces of the seat back is detachably arranged on the frame structure.

8. The automobile seat airbag batch test bench according to claim 2, characterized in that: The image acquisition device includes at least one group, each group of image acquisition devices includes a first image acquisition device and a second image acquisition device arranged in the same rectangular subspace, and a first image acquisition device arranged in an adjacent rectangular subspace opposite to the side of the seat back and facing the side of the seat back; the slide rails of each rectangular subspace are arranged in parallel; and the partition between two rectangular subspaces opposite to each other on the side of the seat back is detachably arranged on the frame structure.

9. The vehicle seat airbag batch test bench according to claim 6, 7 or 8, characterized in that: When the rectangular subspaces include three or four, the test bench further includes a rotating device, which includes a base with a connecting hole in the middle; a rotating shaft is fixedly provided in the middle of the bottom plate, the rotating shaft passes through the connecting hole, and can rotate in the connecting hole.

10. The automobile seat airbag batch test bench according to claim 9, characterized in that: A locking pin is provided on the bottom plate, and a plurality of locking holes are provided on the base. The locking holes are arranged along a circumference with the center located on the axis of the rotating shaft.

11. The automobile seat airbag batch test bench according to claim 9, characterized in that: The rotating device further comprises a driving motor, and the rotating shaft is connected to the output shaft of the driving motor through a connecting hole; a control panel of the driving motor is arranged outside the environmental chamber.

12. The vehicle seat airbag batch test bench according to claim 1, characterized in that: The transparent plate is provided with an angle measuring device, and the origin of the angle measuring device is set as the projection of the seat back adjustment axis on the transparent plate.

13. The automobile seat airbag batch test bench 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 grating sensor and the second grating sensor. Each sub-circuit includes a control switch and an indicator light arranged in series. The signal interface of the control switch is connected to an output pin of the controller. The indicator lights include a first light and a second light. The controller controls the indication status of the indicator light through the airbag deployment position signal and deployment time sent by the grating sensor.

14. The vehicle seat airbag batch test bench according to claim 13, characterized in that: The controller includes at least one control unit, the controller is electrically connected to the airbag detonation system, the control unit includes a timing module and two groups of control modules, the timing module is used to record the airbag deployment time according to the airbag detonation trigger signal; Each control module includes: A position receiving module, used to receive the airbag deployment position signal sent by the grating sensor; a position comparison module, configured to compare the airbag deployment position signal received from the grating sensor with a preset position threshold; The position output module is used to output the airbag deployment signal according to the comparison result of the position comparison module; A time comparison module is used to compare the airbag deployment time t with a preset time threshold; The indication output module is used to control the indication state of the indicator light according to the comparison result of the time comparison module.

15. The vehicle seat airbag batch test bench according to claim 14, characterized in that: The time thresholds pre-set 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; when the airbag deployment time t > the second time threshold T2, the indicator light displays a third color.

16. The automobile seat airbag batch test bench according to claim 1, characterized in that: The test bench further comprises an airbag detonation system, which is connected to each airbag to be tested and is used to detonate each airbag to be tested.

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