Speed reduction sliding table pre-braking simulation collision test system and method

Abstract

The invention discloses a deceleration sliding table pre-braking simulation collision test system and method, and the system comprises a sliding table assembly and a track which are located above the track and can move along the laying direction of the track; the traction assembly and the brake assembly are located on the two opposite sides of the sliding table assembly respectively, and the cable is arranged in the track, connected with the traction assembly and the detachable sliding table assembly respectively and connected with the brake assembly in a clamped mode; the traction assembly is used for pulling the cable to move towards the traction assembly, so that the sliding table assembly moves towards the traction assembly; the brake assembly is used for extruding the inner side wall of the track, so that the sliding table assembly is braked to decelerate under the reverse force of the moving direction of the traction assembly; and the collision waveform reproducing device is fixed to the side, close to the traction assembly, of the rail, so that the sliding table assembly can collide with the collision waveform reproducing device when moving in the direction close to the traction assembly. And a scene in which collision still occurs after emergency braking of a real vehicle is simulated, so that the test is more real.

Description

Technical Field

[0001] The invention relates to the field of automobile collision testing, and in particular to a deceleration slide pre-braking simulation collision testing system and method. Background Art

[0002] The slide table collision test method plays a vital role in the field of automobile safety. It is mainly used to simulate the movement and force of the vehicle during the collision process to evaluate the safety performance of the vehicle. The traditional slide table test method mainly accelerates the slide table to a preset target speed through the traction system, maintains a constant speed for a certain distance, and then releases the slide table. It is a waveform reproducer in front of the slide table collision to realize the simulated collision test. Afterwards, the performance of the restraint system is evaluated by collecting the dummy damage data and high-speed camera video during the collision process.

[0003] At present, the automatic emergency braking system has become a standard feature of automobiles. More and more vehicles can detect obstacles ahead in advance and perform emergency braking, thereby reducing the speed of the vehicle in the event of a head-on collision. However, the traditional slide table collision test method usually does not take into account the role of the automatic emergency braking system. Similarly, the performance development of the existing restraint system is mostly based on the parameter matching design and development of the driver and passengers in a normal sitting position before the collision. It does not take into account the intervention of the automatic emergency braking system. During the braking phase of the automatic emergency braking system before the actual collision, the posture of the driver and passengers has been out of position. As a result, the traditional test method usually only simulates a uniform speed collision scene, and cannot accurately restore the actual pre-collision state under the action of the automatic emergency braking system (AEB), and thus cannot fully evaluate the protection effect of the restraint system in the emergency braking state. Summary of the invention

[0004] The purpose of the present invention is to provide a deceleration slide pre-braking simulation collision test method and system to solve the problem that traditional test methods usually only simulate uniform speed collision scenes and cannot accurately restore the actual pre-collision state under the action of the automatic emergency braking system (AEB).

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A deceleration slide pre-braking simulation collision test system, characterized by comprising:

[0007] A slide assembly and a track, wherein the slide assembly is located above the track and can move along the track laying direction;

[0008] A traction assembly, a brake assembly and a cable, wherein the traction assembly and the brake assembly are respectively located at opposite sides of the slide assembly; the cable is arranged in the track, the cable is respectively connected to the traction assembly and the detachable slide assembly, and the cable is clamped and connected to the brake assembly, the traction assembly is used to pull the cable to move in a direction close to the traction assembly, so that the slide assembly moves in a direction close to the traction assembly, and the brake assembly is used to squeeze the inner side wall of the track, so that the slide assembly is subjected to a reverse force in the moving direction of the traction assembly, thereby braking the slide assembly to decelerate;

[0009] A collision waveform reproducer is fixed on a side of the track close to the traction assembly so that the slide assembly can collide with the collision waveform reproducer when moving toward the traction assembly.

[0010] According to the above technical means, the present invention introduces a pre-braking mechanism, and the traction component and the brake component work together to simulate the real pre-collision deceleration process under the action of the automatic emergency braking system (AEB), rather than being limited to the uniform speed collision scene. This makes the test results closer to the actual collision situation in road driving, and improves the accuracy and reliability of the test.

[0011] The present invention utilizes precise control of the traction assembly and the braking assembly to achieve fine adjustment of the acceleration, deceleration and braking process of the slide assembly, making it convenient for researchers to set different collision speeds and braking strategies as needed, and being able to repeat multiple tests to collect more data, thereby improving the flexibility and repeatability of the experiment.

[0012] The present invention integrates a collision waveform reproducer in the test system to simulate the collision process under a controlled environment, thereby avoiding the risks and costs brought by a real collision. The cable is detachably connected to the slide assembly, so that the cable and the slide assembly can be separated during movement at a specific moment (such as after pre-braking is completed) to release the slide, so that it can freely hit the collision waveform reproducer forward, ensuring that the slide is not bound or disturbed by the cable when hitting the collision waveform reproducer, so that the dynamic characteristics and structural response of the vehicle during collision can be more accurately reflected, which helps to improve the accuracy and reliability of the test data.

[0013] Furthermore, it also includes a traction trolley, which is installed on the track and connected to the cable; the cable is connected to the detachable slide assembly through the traction trolley, and the cable can make the traction trolley move toward the traction assembly or stop moving, so as to move or brake the slide assembly.

[0014] According to the above technical means, the traction trolley is connected to the cable and is configured to be detachably connected to the slide assembly, so that the cable is grounded through the traction trolley and detachably connected to the slide assembly. When the traction assembly is started, the traction assembly pulls the cable to move the traction trolley along the track toward the traction assembly. The traction trolley then drives the slide assembly connected to it to move. The brake assembly can adjust the frequency of the brake assembly squeezing the track or the braking force generated by the brake assembly according to the test requirements. When braking is required, the brake assembly squeezes the track to generate braking force according to the test requirements. At the same time, the traction assembly closes the loop control to slow down the cable, thereby slowing down the slide assembly until it collides with the waveform reproducer.

[0015] At the same time, when it is necessary to replace the cable or perform other maintenance work, it is only necessary to disconnect the connection between the traction trolley and the slide assembly. There is no need to disassemble the entire test system on a large scale, which reduces the complexity and cost of maintenance work.

[0016] Furthermore, it also includes a traction chain, one end of which is fixed to the slide assembly, and the other end is detachably mounted on the traction trolley, and the traction trolley pulls the slide assembly or brakes the slide assembly through the traction chain.

[0017] According to the above technical means, the traction chain, as an indirect connection device between the traction trolley and the brake assembly and the slide assembly, can ensure that the traction trolley and the brake assembly maintain a certain safe distance from the front and rear guide mechanisms of the slide assembly, thereby avoiding interference and collision between the guide mechanism of the slide assembly and the traction trolley and the brake assembly during the braking collision process, ensuring the stability and reliability of the entire test system. By accurately controlling the moving speed and distance of the traction trolley, the motion state of the slide assembly can be finely adjusted, which helps to more accurately simulate the pre-collision state of the vehicle under different speeds and braking conditions.

[0018] Furthermore, a hook swing arm is formed on the traction trolley, the hook swing arm is extended along the moving direction of the traction trolley, and the hook swing arm is configured to be able to swing in the opposite direction of the movement of the traction trolley; the other end of the traction chain is hung on the hook swing arm, and when the hook swing arm swings in the opposite direction of the movement of the traction trolley, the other end of the traction chain can fall off the hook swing arm.

[0019] According to the above-mentioned technical means, the system can trigger the swing of the hook swing arm through physical or non-physical means at a specific moment, thereby realizing the rapid release between the traction chain and the traction trolley; at the same time, by controlling the swing of the hook swing arm, it can ensure that the slide assembly is released at a predetermined speed and position.

[0020] Furthermore, a release protrusion is provided on one side of the track, and the release protrusion is arranged along the length direction of the track, and the release protrusion is in a convex arc shape close to the cable side; during the movement of the traction trolley, the side of the release protrusion in the convex arc shape can abut against the hook swing arm formed on the traction trolley, so that the hook swing arm extending along the moving direction of the traction trolley swings in the opposite direction of the movement of the traction trolley, thereby releasing the connection between the traction chain and the traction trolley.

[0021] According to the above technical means, the release of the connection between the traction chain and the traction trolley is automatically completed by the interaction between the release protrusion and the hook swing arm, which reduces the mechanical wear between the traction chain and the traction trolley, thereby improving the durability and maintenance cycle of the system; at the same time, by setting the position of the release protrusion, the time and position for releasing the connection between the traction chain and the traction trolley can be selected.

[0022] Furthermore, it also includes a brake chain, one end of which is connected to the brake assembly, and the other end is connected to the slide assembly. The brake chain is used for emergency braking of the slide assembly, so that the slide assembly is subjected to a braking force opposite to the moving direction of the slide assembly, thereby braking and decelerating the slide assembly.

[0023] According to the above-mentioned technical means, by adjusting the tension and connection method of the brake chain, the braking strength of the slide assembly can be adjusted to simulate the braking effect under different conditions; at the same time, the redundancy of the system is increased to ensure that effective braking can still be achieved when the brake assembly fails or fails, thereby improving the reliability of the entire system.

[0024] Furthermore, the present invention also provides a deceleration slide pre-braking simulation collision test method, comprising the following steps:

[0025] S1: installing the slide assembly at a set position on the track, and connecting the slide assembly to the cable;

[0026] S2: Start the traction assembly so that the cable drives the slide assembly to accelerate from a stationary state to a speed V1;

[0027] S3: starting the brake assembly, the traction assembly and the brake assembly jointly produce a pre-braking effect to decelerate the slide assembly from speed V1 to speed V2;

[0028] S4: disconnecting the cable from the slide assembly to release the slide assembly, and causing the slide assembly to collide with the collision waveform reproducer to complete the test.

[0029] According to the above technical means, compared with the traditional real vehicle collision test, the method uses the slide assembly to perform a simulated collision test, which significantly reduces the test cost and potential safety risks; at the same time, by simulating the pre-braking stage of the actual vehicle before the collision, and the AEB braking stage before the actual collision, the posture of the driver and passengers has been out of position in the vehicle state, which can more accurately test the safety performance of the vehicle, especially the performance when the automatic emergency braking system intervenes.

[0030] Furthermore, it also includes:

[0031] S0: The starting position and pre-braking distance of the slide assembly are calculated through the slide assembly's own parameters, the preset motion parameters of the slide assembly and the release position of the slide assembly.

[0032] According to the above-mentioned technical means, by calculating the starting position and pre-braking distance of the slide assembly, it is possible to ensure that the initial conditions of the test meet the predetermined test requirements, thereby improving the accuracy of the entire test process; at the same time, the motion trajectory and collision conditions of the slide assembly can be pre-set and optimized according to the test purpose and requirements, making the test design more scientific and reasonable.

[0033] Furthermore, the slide assembly is accelerated from a stationary state to a speed V1 at an average acceleration of no more than 0.3g.

[0034] According to the above technical means, it is stipulated that the slide assembly is accelerated at an acceleration not exceeding 0.3g, which can simulate the acceleration process in most actual driving conditions and make the test results closer to the actual situation. At the same time, by limiting the acceleration, it can ensure that the dynamic stress during the test will not exceed the design limit of the vehicle, thereby improving the safety of the test.

[0035] Furthermore, the slide assembly decelerates from speed V1 to speed V2 at a pre-braking acceleration of -0.8g to -0.1g.

[0036] According to the above technical means, the acceleration range is set to simulate the deceleration process of the actual vehicle when the automatic emergency braking system intervenes; at the same time, by adjusting the range of pre-brake acceleration, the braking effect in different emergency situations can be simulated, which increases the adaptability and flexibility of the test method.

[0037] Beneficial effects of the present invention:

[0038] 1. The pre-braking mechanism is introduced. The traction component and the braking component work together to simulate the real pre-collision deceleration process under the action of the automatic emergency braking system (AEB), rather than being limited to the uniform speed collision scene. This makes the test results closer to the actual collision situation in road driving and improves the accuracy and reliability of the test.

[0039] 2. By using precise control of the traction assembly and the braking assembly, the acceleration, deceleration and braking process of the slide assembly can be finely adjusted, which is convenient for researchers to set different collision speeds and braking strategies as needed, and can repeat multiple tests to collect more data, thereby improving the flexibility and repeatability of the experiment.

[0040] 3. By integrating a collision waveform reproducer in the test system to simulate the collision process under a controlled environment, the risks and costs brought by a real collision are avoided; the cable is detachably connected to the slide assembly, so that the cable and the slide assembly can be separated during movement at a specific moment (such as after pre-braking is completed) to release the slide so that it can freely move forward to hit the collision waveform reproducer, ensuring that the slide is not restrained or disturbed by the cable when hitting the collision waveform reproducer, thereby being able to more accurately reflect the dynamic characteristics and structural response of the vehicle during a collision, which helps to improve the accuracy and reliability of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0042] Figure 2 This is a schematic diagram of the traction trolley structure from a first viewing angle according to the first embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the traction trolley structure from another perspective of the first embodiment of the present invention;

[0044] Figure 4 It is a schematic diagram of the release bump structure of the first embodiment of the present invention;

[0045] Figure 5 This is a flow chart of the second embodiment of the present invention.

[0046] Among them, 1-slide assembly; 2-track; 3-traction assembly; 4-brake assembly; 5-cable;

[0047] 6- traction trolley; 61- hook swing arm;

[0048] 7-traction chain; 8-release bump; 9-brake chain; 10-collision waveform reproducer.

[0049] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific embodiments should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0052] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0053] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0054] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0055] The technical solution of this embodiment is described in detail below in conjunction with specific drawings.

[0056] Embodiment 1

[0057] like Figure 1As shown, a deceleration slide pre-braking simulation collision test system includes: a slide assembly 1 and a track 2, the slide assembly 1 is located above the track 2, and the slide assembly 1 can move along the laying direction of the track 2; a traction assembly 3, a brake assembly 4 and a cable 5, the traction assembly 3 and the brake assembly 4 are respectively located on opposite sides of the slide assembly 1; the cable 5 is arranged in the track 2, the cable 5 is detachably connected to the slide assembly 1, and the two ends of the cable 5 are respectively connected to the traction assembly 3 and the brake assembly 4; the traction assembly 3 is used to pull the cable 5 to move in the direction close to the traction assembly 3, so that the slide assembly 1 moves in the direction close to the traction assembly 3; the brake assembly 4 is used to clamp the cable 5, so that the cable 5 stops moving in the direction close to the traction assembly 3, and then brakes the slide assembly 1; a collision waveform repeater 10, the collision waveform repeater 10 is fixed on the side of the track 2 close to the traction assembly 3, so that the slide assembly 1 can collide with the collision waveform repeater 10 when moving in the direction close to the traction assembly 3.

[0058] The traction assembly 3 pulls the traction trolley 6 by pulling the cable 5, and the traction trolley 6 pulls the slide assembly 1, so that the slide assembly 1 moves toward the traction assembly 3, and the slide assembly 1 changes from a static state to a moving state. During this period, the slide assembly 1 performs uniform acceleration motion. When the slide assembly 1 accelerates to a preset speed V1, the brake assembly 4 clamps the cable 5 to stop the cable 5 from moving toward the traction assembly 3, thereby braking the slide assembly 1 and decelerating the slide assembly 1. When the slide assembly 1 decelerates to the collision speed V2, the connection between the slide assembly 1 and the traction trolley 6 is released. When the slide assembly 1 hits the collision waveform reproducer 10, the connection between the slide assembly 1 and the brake assembly 4 is released.

[0059] In this embodiment, a pre-braking mechanism is introduced, and the traction component 3 and the braking component 4 work together to simulate the actual pre-collision deceleration process under the action of the automatic emergency braking system (AEB), rather than being limited to a uniform-speed collision scenario. This makes the test results closer to the actual collision conditions in road driving, and improves the accuracy and reliability of the test.

[0060] By using the precise control of the traction component 3 and the braking component 4, the acceleration, deceleration and braking process of the slide component 1 can be finely adjusted, which makes it convenient for researchers to set different collision speeds and braking strategies as needed, and can repeat multiple tests to collect more data, thereby improving the flexibility and repeatability of the experiment.

[0061] By integrating the collision waveform reproducer 10 in the test system to simulate the collision process under a controlled environment, the risks and costs brought by a real collision are avoided. The cable 5 is detachably connected to the slide assembly 1, so that the cable 5 and the slide assembly 1 can be separated during the movement at a specific moment (such as after pre-braking is completed) to release the slide, so that it can freely hit the collision waveform reproducer 10 forward, ensuring that the slide is not restrained or interfered by the cable 5 when hitting the collision waveform reproducer 10, so that the dynamic characteristics and structural response of the vehicle during the collision can be more accurately reflected, which helps to improve the accuracy and reliability of the test data.

[0062] In this embodiment, a traction trolley 6 is also included. The traction trolley 6 is installed on the track 2 and connected to the cable 5. The cable 5 is detachably connected to the slide assembly 1 through the traction trolley 6. The cable 5 can move the traction trolley 6 toward the traction assembly 3 or stop moving, so as to move or brake the slide assembly 1.

[0063] In this embodiment, the traction trolley 6 is connected to the cable 5 and is configured to be detachably connected to the slide assembly 1, so that the cable 2 is indirectly and detachably connected to the slide assembly 1 through the traction trolley 6. When the traction assembly 3 is started, the traction assembly 3 pulls the cable 2, so that the traction trolley 6 moves along the track 2 in the direction close to the traction assembly 3. The traction trolley 6 then drives the slide assembly 1 connected thereto to move. When braking is required, the brake assembly 4 squeezes the track 2 to generate a braking force (the frequency or braking force is adjusted according to the test requirements), and at the same time, the traction assembly 3 closes the loop control to decelerate the cable 5, thereby decelerating the slide assembly 1 until it collides with the waveform repeater 10.

[0064] The traction trolley 6, as a transition device between the cable 5 and the slide assembly 1, can disperse and alleviate the impact force and vibration caused by the direct connection of the cable 5 to the slide, thereby enhancing the stability and reliability of the entire test system. By accurately controlling the moving speed and distance of the traction trolley 6, the motion state of the slide assembly 1 can be finely adjusted, which helps to more accurately simulate the pre-collision state of the vehicle under different speeds and braking conditions.

[0065] At the same time, when it is necessary to replace the cable 5 or perform other maintenance work, it is only necessary to disconnect the traction trolley 6 from the slide assembly 1, without large-scale disassembly of the entire test system, thereby reducing the complexity and cost of maintenance work.

[0066] In other embodiments, the slide can be used to place test samples, test dummies, and data acquisition components. By placing test samples and test dummies on the slide, the performance of the vehicle in a collision can be simulated more realistically, and the stress of the occupants in a collision can be evaluated at the same time; the placement of the data acquisition components allows key dynamic response data to be collected during the test, including the acceleration, speed, force, and deformation of the test dummy, which can be used to evaluate and improve the safety performance of the vehicle. At the same time, an adaptive restraint system can be installed on the test sample. When the data acquisition component captures the pre-brake trigger moment, it will trigger the adaptive restraint system on the test sample, and its performance can be evaluated in the simulated collision test, including the system's response time, adjustment accuracy, and occupant protection effect. It can also simulate a test environment that is closer to actual driving conditions, thereby improving the practicality and relevance of the test results.

[0067] In this embodiment, a traction chain 7 is further included, one end of which is fixed to the slide assembly 1, and the other end is detachably mounted on the traction trolley 6, and the traction trolley 6 pulls the slide assembly 1 or brakes the slide assembly 1 through the traction chain 7. The traction chain 7 can stably transmit power between the slide and the traction trolley 6; the use of the traction chain 7 simplifies the connection between the traction trolley 6 and the slide assembly 1, reduces system complexity, and facilitates system maintenance and adjustment.

[0068] In other embodiments, the traction chain 7 may be replaced by other rigid parts for connecting with the traction trolley. When the traction chain 7 is replaced by other rigid parts, during the pre-braking and collision simulation process of the deceleration slide, the traction assembly 3 generates traction force for pulling the traction trolley 6 to move in the direction close to the collision waveform reproducer 10, and other rigid parts can quickly and stably transmit the traction force.

[0069] like Figure 2 and Figure 3 As shown, in this embodiment, a hook swing arm 61 is formed on the traction trolley 6, and the hook swing arm 61 is extended along the moving direction of the traction trolley 6, and the hook swing arm 61 is configured to be able to swing in the opposite direction of the movement of the traction trolley 6; the other end of the traction chain 7 is hung on the hook swing arm 61, and when the hook swing arm 61 swings in the opposite direction of the movement of the traction trolley 6, the other end of the traction chain 7 can fall off the hook swing arm 61. The system can trigger the swing of the hook swing arm 61 by physical or non-physical means at a specific moment, thereby realizing the rapid release between the traction chain 7 and the traction trolley 6; at the same time, by controlling the swing of the hook swing arm 61, it can ensure that the slide assembly 1 is released at a predetermined speed and position.

[0070] like Figure 4As shown, in the present embodiment, a release protrusion 8 is provided on one side of the track 2, and the release protrusion 8 is provided along the length direction of the track 2, and the release protrusion 8 is in a convex arc shape near the cable 5; during the movement of the traction trolley 6, the side of the release protrusion 8 in the convex arc shape can abut against the hook swing arm 61, so that the hook swing arm 61 extending along the moving direction of the traction trolley 6 swings in the opposite direction of the movement of the traction trolley 6, thereby releasing the connection between the traction chain 7 and the traction trolley 6.

[0071] The release of the connection between the traction chain 7 and the traction trolley 6 is automatically completed by the interaction between the release protrusion 8 and the hook swing arm 61, which reduces the mechanical wear between the traction chain 7 and the traction trolley 6, thereby improving the durability and maintenance cycle of the system; at the same time, by setting the position of the release protrusion 8, the time and position for releasing the connection between the traction chain 7 and the traction trolley 6 can be selected.

[0072] In this embodiment, a brake chain 9 is also included, one end of which is connected to the brake assembly 4 and the other end is connected to the slide assembly 1. The brake chain 9 is used to perform emergency braking on the slide assembly 1, so as to decelerate and stop the slide assembly 1. By adjusting the tension and connection mode of the brake chain 9, the braking intensity of the slide assembly 1 can be adjusted, thereby simulating the braking effect under different conditions; at the same time, the redundancy of the system is increased, ensuring that effective braking can still be achieved when the brake assembly 4 fails or fails, thereby improving the reliability of the entire system.

[0073] In summary, a specific process of a deceleration slide pre-braking simulation collision system includes:

[0074] Step 1: The traction assembly 3 pulls the traction trolley 6 by pulling the cable 5, and the traction trolley 6 then pulls the slide assembly 1 to move toward the traction assembly 3 through the traction chain 7, simulating the car changing from a stationary state to a moving state in a real scene;

[0075] Step 2: Clamp the cable 5 by the brake assembly 4 to stop the cable 5 from moving toward the traction assembly 3, thereby braking the slide assembly 1, simulating a scenario in which the vehicle decelerates due to the simultaneous existence of an acceleration in the opposite direction of the vehicle's travel caused by the activation of the automatic emergency braking system and an acceleration in the same direction of the vehicle's travel caused by the traction system pulling the vehicle when the automatic emergency braking system is activated in a real scene;

[0076] Step 3: When the traction trolley 6 moves to the release protrusion 8, the hook swing arm 61 formed by the traction trolley 6 will swing in the opposite direction of the movement of the traction trolley 6, thereby releasing the connection between the traction chain 7 and the traction trolley 6, simulating a real scene in which when the vehicle activates the automatic emergency braking system, the vehicle will continue to move forward due to inertia and there will only be a scene in which the acceleration opposite to the vehicle's driving direction is generated due to the activation of the automatic emergency braking system;

[0077] Step 4: When the slide assembly 1 hits the collision waveform reproducer 10, the brake chain 9 is released, simulating that the vehicle state after the vehicle collision in the real scene is only related to the kinetic energy generated during the collision. At this time, the emergency braking system no longer generates acceleration opposite to the vehicle's driving direction.

[0078] Embodiment 2

[0079] like Figure 5 As shown, this embodiment provides a deceleration slide pre-braking simulation collision test method, which uses the deceleration slide pre-braking simulation collision system in embodiment 1, including the following steps:

[0080] S1: Install the slide assembly 1 at a set position on the track 2, and connect the slide assembly 1 to the cable 5;

[0081] S2: Start the traction assembly 3 so that the cable 5 drives the slide assembly 1 to accelerate from a stationary state to a speed V1;

[0082] S3: starting the brake assembly 4, the traction assembly 3 and the brake assembly 4 jointly produce a pre-braking effect to decelerate the slide assembly 1 from the speed V1 to the speed V2;

[0083] S4: disconnecting the cable 5 from the slide assembly 1 to release the slide assembly 1, and causing the slide assembly 1 to collide with the collision waveform reproducer 10 to complete the test.

[0084] Compared with the traditional real vehicle collision test, this method uses the slide assembly 1 to perform a simulated collision test, which significantly reduces the test cost and potential safety risks; at the same time, by simulating the pre-braking stage of the actual vehicle before the collision, and the AEB braking stage before the actual collision, the posture of the driver and passengers has been out of position in the vehicle state, which can more accurately test the safety performance of the vehicle, especially the performance when the automatic emergency braking system intervenes.

[0085] like Figure 5 As shown, in this embodiment, the following steps are also included:

[0086] S0: The starting position and pre-braking distance of the slide assembly 1 are calculated through the parameters of the slide assembly 1 itself, the preset movement parameters of the slide assembly 1 and the release position of the slide assembly 1.

[0087] By calculating the starting position and pre-braking distance of the slide assembly 1, it is possible to ensure that the initial conditions of the test meet the predetermined test requirements, thereby improving the accuracy of the entire test process; at the same time, the motion trajectory and collision conditions of the slide assembly 1 can be pre-set and optimized according to the test purpose and requirements, making the test design more scientific and reasonable.

[0088] In this embodiment, the slide assembly 1 accelerates from a stationary state to a speed V1 at an average acceleration of no more than 0.3g. By stipulating that the slide assembly 1 accelerates at an acceleration of no more than 0.3g, the acceleration process in most actual driving situations can be simulated, making the test results closer to the actual situation; at the same time, by limiting the acceleration, it can be ensured that the dynamic stress during the test will not exceed the design limit of the vehicle, thereby improving the safety of the test.

[0089] Preferably, the average acceleration of the slide assembly 1 from a stationary state to a speed V1 is no more than 0.3g. The average acceleration of the slide assembly 1 is no more than 0.3g, which is closer to the acceleration process of a car driving in a real scene, making the test result closer to the actual situation.

[0090] In this embodiment, the slide assembly 1 decelerates from speed V1 to speed V2 at a pre-brake acceleration of -0.8g to -0.1g. Setting the acceleration range can simulate the deceleration process of an actual vehicle when the automatic emergency braking system intervenes; at the same time, by adjusting the range of the pre-brake acceleration, the braking effect in different emergency situations can be simulated, which increases the adaptability and flexibility of the test method.

[0091] Preferably, the pre-brake acceleration range is -0.8g to -0.1g, which is closer to the set acceleration range generated by the automobile emergency braking system in real scenarios, and can simulate the deceleration process of the actual vehicle when the automatic emergency braking system intervenes; at the same time, the pre-brake acceleration can be adjusted within this range to simulate real-life scenarios with different braking system strengths.

[0092] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A deceleration slide pre-braking simulation collision test system, characterized in that: include: A slide assembly (1) and a track (2), wherein the slide assembly (1) is located above the track (2), and the slide assembly (1) is movable along the laying direction of the track (2); A traction assembly (3), a brake assembly (4) and a cable (5), wherein the traction assembly (3) and the brake assembly (4) are respectively located on opposite sides of the slide assembly (1); the cable (5) is arranged in the track (2), the cable (5) is respectively connected to the traction assembly (3) and the detachable slide assembly (1), and the cable (5) is clamped and connected to the brake assembly (4); the traction assembly (3) is used to pull the cable (5) to move in a direction close to the traction assembly (3), so that the slide assembly (1) moves in a direction close to the traction assembly (3); the brake assembly (4) is used to squeeze the inner wall of the track (2), so that the slide assembly (1) is subjected to a reverse force in the moving direction of the traction assembly (3), thereby braking the slide assembly (1) to decelerate; A collision waveform reproducer (10) is fixed to a side of the track (2) close to the traction assembly (3), so that the slide assembly (1) can collide with the collision waveform reproducer (10) when moving in a direction close to the traction assembly (3).

2. The deceleration slide pre-braking simulation collision test system according to claim 1, characterized in that: It also includes a traction trolley (6), which is installed on the track (2) and connected to the cable (5); the cable (5) is connected to the detachable slide assembly (1) through the traction trolley (6), and the cable (5) can make the traction trolley (6) move towards the traction assembly (3) or stop moving, so as to move or brake the slide assembly (1).

3. The deceleration slide pre-braking simulation collision test system according to claim 2, characterized in that: It also includes a traction chain (7), one end of which is fixed to the slide assembly (1), and the other end of which is detachably mounted on the traction trolley (6), and the traction trolley (6) pulls the slide assembly (1) or brakes the slide assembly (1) via the traction chain (7).

4. The deceleration slide pre-braking simulation collision test system according to claim 3, characterized in that: A hook swing arm (61) is formed on the traction trolley (6), and the hook swing arm (61) is extended along the moving direction of the traction trolley (6), and the hook swing arm (61) is configured to be able to swing in the opposite direction of the movement of the traction trolley (6); the other end of the traction chain (7) is hung on the hook swing arm (61), and when the hook swing arm (61) swings in the opposite direction of the movement of the traction trolley (6), the other end of the traction chain (7) can fall off the hook swing arm (61).

5. The deceleration slide pre-braking simulation collision test system according to claim 4, characterized in that: A release protrusion (8) is provided on one side of the track (2), and the release protrusion (8) is arranged along the length direction of the track (2). The release protrusion (8) is in a convex arc shape on the side close to the cable (5); during the movement of the traction trolley (6), the side of the release protrusion (8) in a convex arc shape can abut against the hook swing arm (61) formed on the traction trolley (6), so that the hook swing arm (61) extending along the moving direction of the traction trolley (6) swings in the opposite direction of the movement of the traction trolley (6), thereby releasing the connection between the traction chain (7) and the traction trolley (6).

6. The deceleration slide pre-braking simulation collision test system according to claim 1, characterized in that: It also includes a brake chain (9), one end of which is connected to the brake assembly (4) and the other end of which is connected to the slide assembly (1). The brake chain (9) is used to perform emergency braking on the slide assembly (1), so that the slide assembly (1) is subjected to a braking force opposite to the moving direction of the slide assembly (1), thereby braking and decelerating the slide assembly (1).

7. A deceleration slide pre-braking simulation collision test method, characterized in that: Using the test system according to any one of claims 1 to 6, the test method comprises the following steps: S1: installing the slide assembly (1) at a set position on the track (2), and connecting the slide assembly (1) to the cable (5); S2: starting the traction assembly (3) so that the cable (5) drives the slide assembly (1) to accelerate from a stationary state to a speed V1; S3: starting the brake assembly (4), so that the traction assembly (3) and the brake assembly (4) jointly produce a pre-braking effect, so as to decelerate the slide assembly (1) from a speed V1 to a speed V2; S4: disconnecting the cable (5) from the slide assembly (1) to release the slide assembly (1) and causing the slide assembly (1) to collide with the collision waveform reproducer (5) to complete the test.

8. A deceleration slide pre-braking simulation collision test method according to claim 7, characterized in that: Also includes: S0: The starting position and pre-braking distance of the slide assembly (1) are calculated by using the slide assembly (1)'s own parameters, the preset movement parameters of the slide assembly (1) and the release position of the slide assembly (1).

9. A deceleration slide pre-braking simulation collision test method according to claim 7, characterized in that: The slide assembly (1) is accelerated from a stationary state to a speed V1 at an average acceleration of no more than 0.3g.

10. A deceleration slide pre-braking simulation collision test method according to claim 7, characterized in that: The slide assembly (1) decelerates from a speed V1 to a speed V2 at a pre-braking acceleration of -0.8g to -0.1g.

Images