A method and device for testing misoperation of automobile airbag

Abstract

The present invention relates to the technical field of automobile collision test, and discloses a method and device for automobile airbag misoperation test, the method comprising: after the vehicle is pulled to a set speed by external force, the vehicle is allowed to freely pass through a test tooling group, and at least one of a slope test, a pit test, a beam test, a bottom impact test, and a gravel pile impact test is performed, and after the vehicle passes through the test tooling group and lands, the vehicle is stopped by remotely triggering the vehicle brake. The present invention truly simulates the test scene and test speed through the tooling of the corresponding working condition, which can enrich the test conditions of the airbag misoperation test and improve the accuracy of the test.

Description

Technical Field

[0001] The invention relates to the technical field of automobile collision testing, in particular to a method and a device for testing the misoperation of an automobile safety airbag. Background Art

[0002] In order to prevent the airbag from accidentally deploying and injuring people when the car is subjected to a minor impact, it is necessary to conduct airbag misoperation tests during the vehicle development process. The purpose of conducting such tests is to verify whether the airbag will accidentally deploy when the vehicle is subjected to a minor impact.

[0003] At present, the airbag misdeployment test is usually conducted by the driver driving the vehicle at a test site. However, the existing airbag misdeployment test method is relatively simple and fixed, which cannot reflect most of the working conditions in real traffic accidents, and the test accuracy is low. Summary of the invention

[0004] The purpose of the present invention is to provide a method and device for testing the misoperation of an automobile safety airbag, which can reflect most of the working conditions in a real traffic accident and has high test accuracy.

[0005] In order to achieve the above-mentioned object, the present invention provides a method for testing the misuse of an automobile airbag, comprising: after the vehicle is pulled to a set speed by an external force, the vehicle is allowed to freely pass through a test fixture group, and at least one of a slope test, a pit test, a beam test, a bottom impact test, and a gravel pile impact test is performed, and after the vehicle passes through the test fixture group and lands, the vehicle brake is triggered by remote control to stop the vehicle;

[0006] The slope passing test is used to test the state of the airbag when the vehicle passes through the slope tooling in the test tooling group; the pothole passing test is used to test the state of the airbag when the vehicle passes through the pothole tooling in the test tooling group; the cross-beam passing test is used to test the state of the airbag when the vehicle passes through the cross-beam tooling in the test tooling group; the bottom impact test is used to test the state of the airbag when the vehicle passes through the bottom impact tooling in the test tooling group; the gravel pile impact test is used to test the state of the airbag when the vehicle passes through the gravel pile tooling in the test tooling group.

[0007] Furthermore, the ramp test step also includes, by adjusting the inclination angle and length of the ramp fixture, testing the state of the airbag when the vehicle passes the ramp fixture in different postures.

[0008] Furthermore, the step of the pothole test also includes, by adjusting the height and the inclination angle of the pothole tooling, testing the state of the airbag when the vehicle passes through the pothole tooling of different depths in different postures.

[0009] Furthermore, in the step of allowing the vehicle to freely pass through the test fixture group after towing the vehicle to a set speed by external force, the uncoupling speed of the vehicle before entering the pit fixture is calculated based on the set speed, the length and height of the pit fixture, and the rolling friction coefficient between the tires of the vehicle and the pit fixture.

[0010] Furthermore, the step of the crossbeam test also includes adjusting the height of the crossbeam fixture and the angle between the crossbeam fixture and the driving direction, to test the state of the airbag when the vehicle passes through the crossbeam fixtures of different heights in different postures.

[0011] Furthermore, the step of the bottom impact test also includes testing the state of the airbag when the vehicle is subjected to different bottom impacts by changing the shape, height and angle between the bottom impact tooling and the horizontal plane.

[0012] Furthermore, the test method includes the slope test, the pit test, the beam test, the bottom impact test and the gravel pile impact test.

[0013] In order to achieve the above-mentioned purpose, the present invention provides a vehicle airbag misoperation test device on the other hand, including a traction track assembly for towing a vehicle, a vehicle-mounted brake, and at least one of a slope tooling, a pit tooling, a beam tooling, a bottom impact tooling, and a gravel pile tooling; the traction track assembly includes a traction track and a traction wire rope arranged on the traction track.

[0014] Furthermore, the ramp tooling includes two first adjustable guide surfaces which are arranged opposite to each other on both sides of the traction track.

[0015] Furthermore, the pit tooling includes two second adjustable guide tables relatively arranged on both sides of the traction track, the rear end of each of the second adjustable guide tables is provided with an extension structure, the rear end of each of the extension structures is provided with a horizontal guide platform, the rear end of each of the horizontal guide platforms is provided with a guide platform matching section, and the rear end of the guide platform matching section is laterally provided with a reinforced concrete beam structure.

[0016] Furthermore, the bottom impact tooling includes a base and an impact object arranged on the base.

[0017] Furthermore, the test device includes the slope tooling, the pit tooling, the beam tooling, the bottom impact tooling and the gravel pile tooling.

[0018] The above technical solution provides a method and device for testing the misuse of an automobile airbag, which has the beneficial effect, compared with the prior art, of enriching the test conditions of the misuse of an airbag test and improving the accuracy of the test by testing at least one of the working conditions of going over a slope, going over a pit, going over a beam, bottom impact and gravel pile impact, and using the corresponding tooling to truly simulate the test scene and test speed of a test field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a ramp test according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a pit-crossing test according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of a cross-beam test according to an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of a ramp tooling according to an embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of a pit tooling according to an embodiment of the present invention;

[0024] Figure 6 is a schematic structural diagram of a bottom impact tooling according to an embodiment of the present invention;

[0025] Figure 7 The present invention is a flowchart of a method for testing a misoperation of an automobile airbag according to an embodiment of the present invention.

[0026] Among them, 1-slope tooling, 11-first adjustable guide table, 111-inclined surface, 112-bottom surface, 113-lifting device, 2-pit tooling, 21-second adjustable guide table, 22-extension structure, 23-horizontal guide table, 24-guide table matching section, 25-reinforced concrete beam structure, 3-beam tooling, 4-bottom impact tooling, 41-base, 42-impact object, 5-traction track assembly, 51-traction track, 52-traction wire rope. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figures 1 to 7 As shown, the embodiment of the present invention provides a vehicle airbag misuse test method and device, the method is implemented by the device, and the method will be described below in conjunction with the device; the vehicle airbag misuse test method of the embodiment of the present invention includes:

[0031] After the vehicle is towed by external force to a set speed, the vehicle is allowed to freely pass through the test fixture group to carry out at least one of a slope test, a pothole test, a crossbeam test, a bottom impact test and a gravel pile impact test. After the vehicle passes the test fixture group and lands, the vehicle is stopped by remotely triggering the on-board brake; the slope test is used to test the state of the airbag when the vehicle passes through the slope fixture 1 in the test fixture group; the pothole test is used to test the state of the airbag when the vehicle passes through the pothole fixture 2 in the test fixture group; the crossbeam test is used to test the state of the airbag when the vehicle passes through the crossbeam fixture 3 in the test fixture group; the bottom impact test is used to test the state of the airbag when the vehicle passes through the bottom impact fixture 4 in the test fixture group; the gravel pile impact test is used to test the state of the airbag when the vehicle passes through the gravel pile fixture in the test fixture group.

[0032] The automobile airbag misapplication test method of the embodiment of the present invention can enrich the airbag misapplication test conditions and improve the accuracy of the test by testing at least one of the working conditions of going over a slope, going over a pit, going over a beam, bottom impact and gravel pile impact, and using the corresponding tooling to truly simulate the test scene and test speed of a test field.

[0033] like Figure 1 and Figure 4 As shown, the steps of the slope test include: after the vehicle is pulled by external force to a set speed, the vehicle is allowed to freely pass the slope fixture 1, and after the vehicle passes the slope fixture 1 and lands, the vehicle is stopped by remotely triggering the vehicle brake; during the slope test, the state of the airbag is tested when the vehicle passes the slope fixture 1. The embodiment of the present invention can realistically simulate different slope test scenarios and test speeds of the test field through the slope fixture 1, thereby improving the accuracy of the test; at the same time, the test is carried out by pulling the vehicle by external force, which not only prevents the driver from being injured, but also prevents the power battery of the electric vehicle from catching fire after being impacted by replacing the power battery with a battery replacement block during the test.

[0034] The step of the ramp test also includes adjusting the inclination angle and length of the ramp fixture to test the state of the airbag when the vehicle passes the ramp fixture 1 in different postures. The embodiment of the present invention can simulate different ramp conditions by adjusting the inclination angle and length of the ramp fixture 1, thereby enriching the test conditions of the airbag misuse test and improving the accuracy of the test.

[0035] During the slope test, the traction track assembly 5 is used to provide external force to pull the vehicle, and the traction track assembly 5 includes a traction track 51 and a traction wire rope 52 arranged on the traction track 51; the vehicle is equipped with an on-board brake; the slope tooling 1 includes two first adjustable guide tables 11 arranged on both sides of the traction track 51. Figure 4 As shown, the cross section of the first adjustable guide table 11 can be specifically a triangle, the tire passes over the inclined surface 111 of the first adjustable guide table 11 to simulate the slope scene, the bottom surface 112 of the first adjustable guide table 11 is rigidly connected to the ground by screws or bolts, and the rear side of the first adjustable guide table 11 is provided with a lifting device 113, and the lifting device 113 can adjust the inclination angle of the first adjustable guide table 11. The embodiment of the present invention can truly simulate different slope test scenes and test speeds of the test field through the slope tooling 1, thereby improving the accuracy of the test.

[0036] Specifically, the vehicle is prepared before the slope test: the vehicle is weighted, a weighted dummy is fixed on the seat, and the tire pressure is adjusted to the set value. The vehicle brake device, acceleration sensors, and data acquisition equipment are installed on the vehicle.

[0037] After the fixture is fixed and the first adjustable guide table 11 is adjusted, the test is implemented: the test speed of the vehicle is set, and the test vehicle is towed by the traction track assembly 5. After reaching the test speed, it is unhooked in front of the ramp fixture 1, allowing the vehicle to freely drive onto the ramp fixture 1, and at the same time, effective and necessary data for a sufficiently long time are collected. After the vehicle passes through the ramp fixture 1 and lands, the vehicle brake is triggered by a remote control at an appropriate position to stop the vehicle from moving.

[0038] Taking the test speed of 40 km / h and the length of the first adjustable guide table 11 of 2 meters as an example, the test matrix can be set as shown in the following table. According to the specific product development requirements, the test speed, the angle and length of the first adjustable guide table 11 can be changed. The angle of the first adjustable guide table 11 can be adjusted by a hydraulic lifting device 113, or the first adjustable guide table 11 with different angles can be made. The length of the first adjustable guide table 11 can be set by different length combinations of the segmented structure.

[0039]

[0040]

[0041] Test result determination: If the airbag explodes during the test, it is determined that the airbag misoperation performance of the vehicle to be tested is unqualified.

[0042] like Figure 2 and Figure 5 As shown, the steps of the pit test include: after the vehicle is pulled by external force to travel to a set speed, the vehicle is allowed to freely pass through the pit fixture 2, and after the vehicle enters the pit fixture 2 and lands, the vehicle is stopped by remotely triggering the vehicle brake; during the pit test, the state of the airbag is tested when the vehicle passes through the pit fixture 2. The embodiment of the present invention can realistically simulate different pit test scenes and test speeds in the test field through the pit fixture 2, thereby improving the accuracy of the test; at the same time, the test is carried out by pulling the vehicle by external force, which not only prevents the driver from being injured, but also prevents the power battery of the electric vehicle from catching fire after being impacted by replacing the power battery with a battery replacement block during the test.

[0043] The step of the pit passing test also includes adjusting the height and inclination of the pit fixture 2 to test the state of the airbag when the vehicle passes through the pit fixture 2 of different depths in different postures. The embodiment of the present invention can simulate different pit passing conditions by adjusting the height and inclination of the pit fixture 2, thereby enriching the test conditions of the airbag misuse test and improving the accuracy of the test.

[0044] In the step of allowing the vehicle to freely pass through the pit fixture 2 after the vehicle is pulled to a set speed by an external force, the uncoupling speed of the vehicle before entering the pit fixture 2 is calculated according to the set speed, the length and height of the pit fixture 2, and the rolling friction coefficient between the tire of the vehicle and the pit fixture 2. Since the pit formed by the pit fixture 2 is higher than the ground, while the pit in the test field is lower than the ground, in order to truly simulate the pit-passing working condition in the test field, it is necessary to calculate the speed of the vehicle before uncoupling. By calculating the uncoupling speed of the vehicle before entering the pit fixture 2 according to the set speed, the length and height of the pit fixture 2, and the rolling friction coefficient between the tire of the vehicle and the pit fixture 2, it can be ensured that the required test speed for the pit-passing working condition simulated by the pit fixture 2 is the same as the test speed in the test field, thereby truly simulating different pit-passing test scenes and test speeds in the test field and improving the accuracy of the test.

[0045] During the pit test, the traction rail assembly 5 is also used to provide external force to pull the vehicle. The pit fixture 2 includes two second adjustable guide tables 21 arranged on both sides of the traction rail 51. The rear end of each second adjustable guide table 21 is provided with an extension structure 22. The rear end of each extension structure 22 is provided with a horizontal guide table 23. The rear end of each horizontal guide table is provided with a guide table matching section 24. The rear end of the guide table matching section 24 is provided with a reinforced concrete beam structure 25 in the horizontal direction. The second adjustable guide table 21 can be arranged in the same structure as the first adjustable guide table 11. The height of the entire pit fixture 2 can also be adjusted by the extension structure 22. The horizontal guide table 23 can also be set to be adjustable in height. The angle between the reinforced concrete beam structure 25 and the traction rail 51 can be adjusted by the guide table matching section 24. The embodiment of the present invention can truly simulate different pit test scenarios and test speeds of the test field through the pit fixture 2, thereby improving the accuracy of the test.

[0046] Specifically, the vehicle is prepared before the pothole test: the vehicle is weighted, a weighted dummy is fixed on the seat, and the tire pressure is adjusted to the set value. The vehicle brake device, acceleration sensors, and data acquisition equipment are installed on the vehicle.

[0047] Fix the tooling and adjust the height and the angle between the reinforced concrete beam structure 25 and the traction track 51 so that the vehicle can drive onto the horizontal guide platform 23 more smoothly; according to experimental needs, adjust the angle of the second adjustable guide platform 21, the height of the horizontal guide platform 23, the height of the guide platform matching section 24, and the height and angle of the reinforced concrete beam structure 25.

[0048] When the test is implemented, the test speed of the vehicle is first set (the vehicle uncoupling speed is set according to calculation), and the test vehicle is towed by the traction track assembly 5, so that it reaches the uncoupling speed and then uncouples before the pit tooling 2, allowing the vehicle to freely and smoothly drive onto the pit tooling 2, and then simulate the vehicle driving into the pit. During the test, valid and necessary data is collected for a sufficient period of time. After the vehicle enters the pit and lands, the vehicle brake is triggered by a remote control at an appropriate position to stop the vehicle from moving.

[0049] The conversion between the vehicle test speed and the uncoupling speed is as follows: The test speed v in this working condition is the speed of the vehicle when it enters the pit. The vehicle is uncoupled before passing the second adjustable guide table 21, and the uncoupling speed at this moment is v 0 The height of the horizontal guide platform 23 and the reinforced concrete beam structure 25 is h, the total length of the pit fixture 2 is l, the rolling friction coefficient between the tire and the fixture is μ, and the vehicle test mass is m. The vehicle drives smoothly when it goes up the slope to the horizontal guide platform 23. According to the kinetic energy theorem:

[0050]

[0051] Taking the test speed of 40 km / h as an example, the test matrix can be set as shown in the following table. According to specific product development requirements, the test speed, the pit depth (the pit depth is adjusted by adjusting the height of the horizontal guide platform 23), and the angle between the reinforced concrete beam structure 25 and the driving direction can be changed.

[0052]

[0053] In addition, when the vehicle speed is low, the bottom of the vehicle will directly hit the reinforced concrete beam structure 25 (simulating the edge of a curb or a road pothole). The tooling can be used for safety performance testing after the collision between the power battery at the bottom of the electric vehicle and the reinforced concrete beam structure 25 (simulating the edge of a curb or a road pothole).

[0054] Test result determination: If the airbag explodes during the test, it is determined that the airbag misoperation performance of the vehicle to be tested is unqualified.

[0055] like Figure 3As shown, the steps of the cross-beam test include: after the vehicle is pulled by external force to travel to a set speed, the vehicle is allowed to freely pass through the cross-beam fixture 3, and after the vehicle passes through the cross-beam fixture 3, the vehicle brake is triggered by remote control to stop the vehicle; during the cross-beam test, the state of the airbag is tested when the vehicle passes through the cross-beam fixture 3. The embodiment of the present invention can realistically simulate different cross-beam test scenarios and test speeds of the test field through the cross-beam fixture 3, thereby improving the accuracy of the test; at the same time, the test is carried out by pulling the vehicle by external force, which not only prevents the driver from being injured, but also prevents the power battery of the electric vehicle from catching fire after being impacted by replacing the power battery with a battery replacement block during the test.

[0056] The step of the crossbeam test also includes adjusting the height of the crossbeam fixture 3 and the angle between the crossbeam fixture 3 and the driving direction to test the state of the airbag when the vehicle passes through the crossbeam fixture 3 of different heights in different postures. The embodiment of the present invention can simulate different crossbeam conditions by adjusting the height of the crossbeam fixture 3 and the angle between the crossbeam fixture 3 and the driving direction, thereby enriching the test conditions of the airbag misuse test and improving the accuracy of the test.

[0057] During the crossbeam test, the traction track assembly 5 is also used to provide external force to pull the vehicle. The crossbeam fixture 3 includes a crossbeam arranged transversely on the traction track 51. The crossbeam can be a rail, a wooden crossbeam, a curbstone, etc. The angle between the crossbeam and the driving direction is adjusted according to the test needs. The embodiment of the present invention can realistically simulate different crossbeam test scenarios and test speeds in the test field through the crossbeam fixture 3, thereby improving the accuracy of the test.

[0058] Carry out vehicle preparation before the test: balance weight on the vehicle, fix a balance weight dummy on the seat, adjust the tire pressure to the design value, install on-board braking device, acceleration and other sensors, and data acquisition equipment on the vehicle.

[0059] When the test is implemented, the test speed of the vehicle is first set, and the test vehicle is towed by the traction track assembly 5, so that it reaches the test speed and is unhooked before passing the beam, and the vehicle passes the beam. During the test, valid and necessary data are collected for a sufficient period of time. After the vehicle passes the beam, the on-board brake is triggered by the remote control at an appropriate position to stop the vehicle.

[0060] Taking the test speed of 40km / h as an example, the test matrix can be set as shown in the following table. According to the specific product development requirements, the test speed, whether to brake (start braking 1 meter in front of the beam), the height (or shape) of the beam, and the angle between the beam and the driving direction can be changed.

[0061]

[0062] In addition, the cross-beam test is also suitable for safety performance testing after the collision between the bottom power battery and the cross-beam of electric vehicles.

[0063] Test result determination: If the airbag explodes during the test, it is determined that the airbag misoperation performance of the vehicle to be tested is unqualified.

[0064] like Figure 6 As shown, the steps of the bottom impact test include: after the vehicle is pulled by external force to travel to a set speed, the vehicle is allowed to freely pass the bottom impact fixture 4, and after the vehicle passes the bottom impact fixture 4, the vehicle is stopped by remotely triggering the vehicle brake; during the bottom impact test, the state of the airbag is tested when the vehicle passes the bottom impact fixture 4. The embodiment of the present invention can realistically simulate different bottom impact test scenarios and test speeds of the test field through the bottom impact fixture 4, thereby improving the accuracy of the test; at the same time, by pulling the vehicle by external force for testing, it can not only prevent the driver from being injured, but also prevent the power battery of the electric vehicle from catching fire after being impacted by replacing the power battery with a battery replacement block during the test.

[0065] The step of the bottom impact test also includes testing the state of the airbag when the vehicle is impacted in different situations by changing the shape, height and angle between the bottom impact fixture 4 and the horizontal plane. The embodiment of the present invention can simulate different bottom impact conditions by adjusting the shape, height and angle between the bottom impact fixture 4 and the horizontal plane, thereby enriching the test conditions of the airbag misuse test and improving the accuracy of the test.

[0066] The bottom impact fixture 4 includes a base 41 and an impact object 42 disposed on the base 41. The impact object 42 may be in the shape of a ball head, a column, a plate, a cone, etc., and the installation height of the impact object 42 on the base 41 is adjustable. According to the test requirements, the required type of bottom impact fixture 4 is selected and installed in the middle of the traction track 51. The overlapping height between the bottom impact fixture 4 and the bottom of the vehicle is adjusted as needed. The embodiment of the present invention can realistically simulate different bottom impact test scenarios and test speeds in the test field through the bottom impact fixture 4, thereby improving the accuracy of the test.

[0067] Vehicle preparation before the test: counterweight the vehicle, fix a counterweight dummy on the seat, adjust the tire pressure to the design value, install on-board braking devices, acceleration sensors, and data acquisition equipment on the vehicle.

[0068] During the test, the test speed of the vehicle is set, and the test vehicle is towed by the towing track assembly 5, so that after reaching the test speed, the vehicle is unhooked at an appropriate position before impact, and the vehicle passes through the bottom impact fixture 4. During the test, valid and necessary data are collected for a sufficient period of time. After the bottom impact of the vehicle is completed, the vehicle brake is triggered by a remote control at an appropriate position to stop the vehicle from moving.

[0069] Taking the test speed of 30km / h as an example, the test matrix can be set as shown in the following table. According to the specific product development requirements, the test speed, whether to brake (brake after hitting the tooling or start braking 1 meter in front of the tooling), the type of bottom impact tooling 4 (ball head, columnar, plate, cone), the angle between the axis of the bottom impact tooling 4 and the horizontal plane, and the overlapping height between the bottom impact tooling 4 and the bottom of the vehicle can be changed.

[0070]

[0071]

[0072] In addition, this structure is also suitable for testing the safety performance of the bottom power battery of electric vehicles after being hit from the bottom.

[0073] Test result determination: If the airbag explodes during the test, it is determined that the airbag misoperation performance of the vehicle to be tested is unqualified.

[0074] The steps of the gravel pile impact test include: after the vehicle is pulled by external force to travel to a set speed, the vehicle is allowed to freely impact the gravel pile fixture; during the gravel pile impact test, the state of the airbag when the vehicle freely impacts the gravel pile fixture is tested. The embodiment of the present invention can realistically simulate different gravel pile impact test scenes and test speeds in the test field through the gravel pile fixture, thereby improving the accuracy of the test; at the same time, by pulling the vehicle by external force to conduct the test, it can not only prevent the driver from being injured, but also prevent the power battery of the electric vehicle from catching fire after being impacted by replacing the power battery with a battery replacement block during the test.

[0075] The gravel pile impact test is performed by towing the vehicle through the traction track assembly 5. The gravel pile can be directly piled and fixed according to the test site conditions. The gravel can also be placed in a sufficiently large steel box, which can be locked and fixed to the ground during the test and can be moved after the test. When the steel box containing gravel is installed on the traction track, the gravel pile is in the shape of a prism (or a frustum) with a horizontal top.

[0076] Vehicle preparation before the test: counterweight the vehicle, fix a counterweight dummy on the seat, adjust the tire pressure to the design value, install on-board braking devices, acceleration sensors, and data acquisition equipment on the vehicle.

[0077] During the test, the test speed of the vehicle is set, and the test vehicle is towed by the traction system. After reaching the test speed, the vehicle is unhooked before collision, and the vehicle hits the gravel pile. During the test, valid and necessary data is collected for a sufficient period of time. After the vehicle hits the gravel pile, it usually stops moving within a short distance. If necessary, the on-board brake can be triggered by the remote control at the appropriate position to stop the vehicle from moving.

[0078] Taking the test speed of 35km / h as an example, the test matrix can be set as shown in the following table. According to the specific product development requirements, the test speed, gravel pile shape or height, and impact angle can be changed.

[0079]

[0080] In addition, the gravel pile impact test is also suitable for testing the safety performance of electric vehicle bottom power batteries after collision with gravel piles.

[0081] Test result determination: If the airbag explodes during the test, it is determined that the airbag misoperation performance of the vehicle to be tested is unqualified.

[0082] In another embodiment, the test method includes a slope test, a pit test, a cross beam test, a bottom impact test and a gravel pile impact test. In order to truly simulate the test scene of the test site, the test device includes a slope tool 1, a pit tool 2, a cross beam tool 3, a bottom impact tool 4 and a gravel pile tool. By performing slope tests, pit tests, cross beam tests, bottom impact tests and gravel pile impact tests on the test vehicle, the performance of the airbag under different working conditions can be fully tested, further improving the accuracy of the test.

[0083] When the automobile airbag misoperation test method and device of the embodiment of the present invention are used to test an electric vehicle containing a power battery, the power battery can be replaced with a battery replacement block, which is powered by a traction track assembly, thereby reducing the probability of fire in the electric vehicle when it is in a dangerous misoperation condition to zero, thereby avoiding damage to the vehicle and equipment and casualties.

[0084] In summary, the embodiments of the present invention provide a method and device for testing the misoperation of an automobile airbag. The vehicle is towed by external force to avoid the driver from driving the vehicle in the test field for testing, thereby preventing personal injury to the driver. The power battery can be replaced with a battery replacement block by towing the vehicle by external force to avoid fire when the electric vehicle is in a dangerous misoperation condition. By testing the conditions of going over a slope, going over a pit, going over a beam, bottom impact and gravel pile impact respectively, using corresponding tooling to truly simulate the test scene and test speed of the test field, and changing the parameters of the relevant test variables by adjusting the corresponding tooling, the test conditions of the airbag misoperation test can be enriched and the accuracy of the test can be improved.

[0085] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A vehicle airbag misoperation test method, characterized in that: include: After the vehicle is pulled to a set speed by external force, the vehicle is allowed to freely pass through the test fixture group, and a pit test is performed, and at least one of a slope test, a beam test, a bottom impact test, and a gravel pile impact test is performed. After the vehicle passes through the test fixture group and lands, the vehicle brake is triggered remotely to stop the vehicle; The slope test is used to test the state of the airbag when the vehicle passes through the slope fixture in the test fixture group; the pothole test is used to test the state of the airbag when the vehicle passes through the pothole fixture in the test fixture group; the crossbeam test is used to test the state of the airbag when the vehicle passes through the crossbeam fixture in the test fixture group; the bottom impact test is used to test the state of the airbag when the vehicle passes through the bottom impact fixture in the test fixture group; the gravel pile impact test is used to test the state of the airbag when the vehicle passes through the gravel pile fixture in the test fixture group; The pit tooling includes two second adjustable guide tables arranged opposite to each other on both sides of the traction track, each of the second adjustable guide tables is provided with an extension structure at the rear end, each of the extension structures is provided with a horizontal guide table at the rear end, each of the horizontal guide tables is provided with a guide table matching section at the rear end, and a reinforced concrete beam structure is transversely provided at the rear end of the guide table matching section; In the step of allowing the vehicle to freely pass through the test fixture group after the vehicle is towed to a set speed by external force, the uncoupling speed of the vehicle before entering the pit fixture is calculated based on the set speed, the length and height of the pit fixture, and the rolling friction coefficient between the tires of the vehicle and the pit fixture.

2. The automobile airbag misoperation test method according to claim 1, characterized in that: The step of the ramp test also includes adjusting the inclination angle and length of the ramp fixture to test the state of the airbag when the vehicle passes the ramp fixture in different postures.

3. The automobile airbag misoperation test method according to claim 1, characterized in that: The step of the pothole test also includes adjusting the height and inclination of the pothole fixture to test the state of the airbag when the vehicle passes through the pothole fixtures of different depths in different postures.

4. The automobile airbag misoperation test method according to claim 1, characterized in that: The step of the crossbeam test also includes adjusting the height of the crossbeam fixture and the angle between the crossbeam fixture and the driving direction to test the state of the airbag when the vehicle passes through the crossbeam fixtures of different heights in different postures.

5. The automobile airbag misoperation test method according to claim 1, characterized in that: The step of the bottom impact test also includes testing the state of the airbag when the vehicle is subjected to different bottom impacts by changing the shape, height and angle between the bottom impact tooling and the horizontal plane.

6. The automobile airbag misoperation test method according to any one of claims 1 to 5, characterized in that: The test method includes the slope crossing test, the beam crossing test, the bottom impact test and the gravel pile impact test.

7. An automobile airbag misoperation test device, characterized in that: The utility model comprises a traction track assembly for traction vehicle travel, a vehicle-mounted brake, a pit tooling, and at least one of a slope tooling, a beam tooling, a bottom impact tooling, and a gravel pile tooling; the traction track assembly comprises a traction track and a traction wire rope arranged on the traction track; The pit tooling includes two second adjustable guide tables arranged opposite to each other on both sides of the traction track, each of the second adjustable guide tables is provided with an extension structure at the rear end, each of the extension structures is provided with a horizontal guide table at the rear end, each of the horizontal guide tables is provided with a guide table matching section at the rear end, and a reinforced concrete beam structure is transversely provided at the rear end of the guide table matching section; The pit fixture is used to make the vehicle undergo a pit test. In the pit test, after the vehicle is pulled to a set speed by an external force, the vehicle is allowed to freely pass through the pit fixture. The uncoupling speed of the vehicle before entering the pit fixture is calculated based on the set speed, the length and height of the pit fixture, and the rolling friction coefficient between the tires of the vehicle and the pit fixture.

8. The automobile airbag malfunction test device according to claim 7, characterized in that: The ramp tooling comprises two first adjustable guide tables which are arranged opposite to each other on both sides of the traction track.

9. The automobile airbag malfunction test device according to claim 7, characterized in that: The bottom impact tool comprises a base and an impact object arranged on the base.

10. The automobile airbag misoperation test device according to any one of claims 7 to 9, characterized in that: The test device includes the slope tool, the beam tool, the bottom impact tool and the gravel pile tool.

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