Two-vehicle collision test system and collision control method

Abstract

This invention relates to the field of vehicle collision testing technology, and provides a two-vehicle collision testing system and collision control method. The system includes: a host computer, a PLC controller, a first traction device, and a second traction device. The host computer receives test parameters input by the user and sends them to the PLC controller. The PLC controller calculates the traction parameters and traction duration for the two vehicles based on the test parameters, and sequentially controls the first and second traction devices to accelerate and traction the two vehicles, ensuring they simultaneously reach a preset collision point. This invention can control two vehicles to complete a multi-angle collision at a preset collision point, achieving high testing accuracy and improving the accuracy of vehicle safety testing.

Description

Technical Field

[0001] This invention belongs to the field of vehicle collision testing technology, and particularly relates to a two-vehicle collision testing system and collision control method. Background Technology

[0002] Current vehicle crash tests primarily focus on vehicle-to-barrier collisions. However, angled vehicle-to-vehicle collisions are actually the most frequent type of traffic accident in real-world scenarios. Compared to barrier collisions, the absorption and dispersion of impact energy in a vehicle-to-vehicle collision is far more complex. If the concentrated impact force generated by the unevenness of the other vehicle's structure and component hardness cannot be effectively dispersed, the deformation of the passenger compartment will increase, and the impact on the occupants will also be greater. Therefore, angled vehicle-to-vehicle collisions are a more effective test of a vehicle's safety level. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a two-vehicle collision test system and a collision control method to solve the problem that it is difficult to accurately realize vehicle-to-vehicle collision tests in the prior art.

[0004] A first aspect of the present invention provides a two-vehicle collision test system, comprising: a host computer, a PLC controller, a first traction device, and a second traction device;

[0005] The host computer is used to receive the test parameters input by the user and send them to the PLC controller;

[0006] The PLC controller is used to calculate the traction parameters and traction duration of the two vehicles based on the test parameters. Based on the traction parameters and traction duration of the two vehicles, it controls the first traction device and the second traction device to traction and accelerate the two vehicles so that the two vehicles reach the preset collision point at the same time.

[0007] In conjunction with the first aspect, in one possible implementation of the first aspect, the PLC controller is specifically used for:

[0008] Calculate the difference in traction time based on the traction time of the two vehicles;

[0009] By controlling the start-up time of the motors in the two traction devices, the vehicle with the longer traction time is controlled to accelerate first. After the acceleration time of the vehicle reaches the difference in traction time, the vehicle with the shorter traction time is controlled to accelerate, so that the two vehicles reach the preset collision point at the same time. During acceleration, the PLC controller controls the power and torque of the motors in the traction devices through traction parameters.

[0010] In conjunction with the first aspect, in one possible implementation of the first aspect, the test parameters include vehicle information of the two vehicles and the collision angle;

[0011] The PLC controller is also used to simulate and calculate the collision position of the two vehicles based on their vehicle information and collision angle, and then send the result to the host computer.

[0012] The host computer is also used to show users the collision locations of the two vehicles.

[0013] In conjunction with the first aspect, in one possible implementation of the first aspect, each traction device includes a track, a traction rope, a traction trolley, and a motor; the traction rope is wound around the hub of the motor and moves by the drive of the hub; the traction trolley is set on the track and connected to the traction rope, and is used to drive the vehicle to move along the track by the traction of the traction rope.

[0014] At least one position detection encoder is also installed on the track to detect the time when the vehicle reaches the position of the position detection encoder during traction acceleration and send it to the PLC controller.

[0015] The PLC controller is also used to provide feedback and adjustments to the vehicle's traction parameters based on time.

[0016] In conjunction with the first aspect, in one possible implementation of the first aspect, the traction trolley is equipped with a track extension rod, which points in the forward direction of the traction trolley;

[0017] One end of the track extension rod is connected to the traction trolley, and the other end of the track extension rod is equipped with a hook. The traction trolley is connected to the vehicle through the hook on the track extension rod.

[0018] In conjunction with the first aspect, in one possible implementation of the first aspect, one end of the track extension rod is connected to the traction trolley via a rotating component;

[0019] The rotating component is used to change the direction of the track extension rod.

[0020] In conjunction with the first aspect, in one possible implementation of the first aspect, a connecting component is provided in the middle part of the track extension rod;

[0021] The connecting component is used to snap onto the track to secure the track extension rod.

[0022] In conjunction with the first aspect, in one possible implementation of the first aspect, the track extension rod is a straight rod of fixed length, or the track extension rod is a telescopic rod of adjustable length.

[0023] A second aspect of the present invention provides a collision control method, which is applied to a PLC controller in a two-vehicle collision test system as described in the first aspect above.

[0024] The method includes:

[0025] Obtain the test parameters for the two-vehicle collision test;

[0026] Based on the test parameters, calculate the traction parameters and traction duration for the two vehicles;

[0027] Based on the traction parameters and traction duration of the two vehicles, the first and second traction devices are controlled sequentially to accelerate the two vehicles, so that the two vehicles reach the preset collision point simultaneously.

[0028] In conjunction with the second aspect, in one possible implementation of the second aspect, based on the traction parameters and traction duration of the two vehicles, the first traction device and the second traction device are controlled sequentially to traction and accelerate the two vehicles, including:

[0029] Calculate the difference in traction time based on the traction time of the two vehicles;

[0030] By controlling the start-up time of the motors in the two traction devices, the vehicle with the longer traction time is controlled to accelerate first, and after the acceleration time of the vehicle reaches the difference in traction time, the vehicle with the shorter traction time is controlled to accelerate, so that the two vehicles reach the preset collision point at the same time; wherein, during traction acceleration, the power and torque of the motors in the traction devices are controlled by the traction parameters.

[0031] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows:

[0032] The two-vehicle collision test system of this invention has two traction devices, namely a first traction device and a second traction device, each traction device towing one vehicle. The two traction devices are controlled by the same PLC controller. The PLC controller receives test parameters and automatically calculates the traction parameters and traction duration for both vehicles, sequentially controlling the first and second traction devices to accelerate and traction the two vehicles, enabling both vehicles to reach a preset collision point simultaneously. This invention can control two vehicles to complete a multi-angle collision at the preset collision point, achieving high test precision and improving the accuracy of vehicle safety testing. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the two-vehicle collision test system provided in an embodiment of the present invention;

[0035] Figure 2This is a schematic diagram of the traction device provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the track extension rod provided in an embodiment of the present invention;

[0037] Figure 4 These are collision comparison images before and after the installation of the extended rod on the track, provided in an embodiment of the present invention.

[0038] Figure 5 This is a structural relationship diagram of the traction trolley, track extension rod, and track provided in an embodiment of the present invention;

[0039] Figure 6 This is a flowchart illustrating the collision control method provided in an embodiment of the present invention. Detailed Implementation

[0040] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0041] To illustrate the technical solution described in this invention, specific embodiments are described below.

[0042] To address the limitation of existing traction systems, which can only perform traditional vehicle-to-barrier collision tests and cannot conduct multi-angle head-on collisions between two vehicles, this embodiment provides a two-vehicle collision test system. (See attached document.) Figure 1 As shown, the system includes: a host computer 10, a PLC controller 11, a first traction device 12, and a second traction device 13.

[0043] The host computer 10 is used to receive the test parameters input by the user and send them to the PLC controller 11.

[0044] The PLC controller 11 is used to calculate the traction parameters and traction duration of the two vehicles according to the test parameters. Based on the traction parameters and traction duration of the two vehicles, it controls the first traction device 12 and the second traction device 13 to traction and accelerate the two vehicles so that the two vehicles reach the preset collision point at the same time.

[0045] In this embodiment, two traction devices are designed to tow two vehicles respectively to achieve vehicle-to-vehicle collision. The entire system consists of a host computer and a PLC controller.

[0046] The host computer 10 is used to receive test parameters input by the user before the test, including but not limited to parameters such as collision speed, departure position, uncoupling position, acceleration, vehicle length, vehicle width, and collision angle.

[0047] Understandably, parameters such as collision speed, departure position, uncoupling position, and acceleration not only affect traction parameters (reflected by the speed and torque of the motor in the traction device) but also traction time. That is, the time it takes for the two vehicles to travel from start to the collision point is generally different. To ensure the two vehicles collide at the collision point, the PLC controller 11 calculates the traction parameters (motor speed and torque) and traction time for each vehicle based on these parameters. Then, it determines the departure order of the two vehicles based on their traction times, with the vehicle with the longer travel time departing first and the vehicle with the shorter travel time departing later, ultimately ensuring that both vehicles arrive at the collision point simultaneously.

[0048] This system controls the precise collision of two vehicles based on the departure time, unaffected by other factors. It is applicable to various two-vehicle collision scenarios, such as two vehicles colliding at the same speed, two vehicles colliding at different speeds, two vehicles colliding at multiple angles, and two vehicles of different models colliding.

[0049] As can be seen, the two-vehicle collision test system of this invention has two sets of traction devices, namely a first traction device 12 and a second traction device 13, each traction device tractioning one vehicle. The two traction devices are controlled by the same PLC controller 11. The PLC controller 11 receives test parameters and automatically calculates the traction parameters and traction duration for both vehicles, sequentially controlling the first traction device 12 and the second traction device 13 to accelerate the two vehicles, enabling both vehicles to reach the preset collision point simultaneously. This invention can control two vehicles to complete a multi-angle collision at the preset collision point, achieving high test accuracy and improving the accuracy of vehicle safety testing.

[0050] In one possible implementation, the PLC controller 11 is specifically used for:

[0051] Calculate the difference in traction time based on the traction time of the two vehicles;

[0052] By controlling the start-up time of the motors in the two traction devices, the vehicle with the longer traction time is controlled to accelerate first. After the traction acceleration time of the vehicle reaches the difference in traction time, the vehicle with the shorter traction time is controlled to accelerate, so that the two vehicles reach the preset collision point at the same time. During traction acceleration, the PLC controller 11 controls the power and torque of the motors in the traction devices through traction parameters.

[0053] In this embodiment, the PLC controller 11 simultaneously controls two sets of traction devices to achieve a head-on collision between the two vehicles. The motors in each of the two traction devices are equipped with filters to ensure that the motor current input is a constant current source. The two traction devices work together, one master and one slave. The PLC controller 11 calculates the set parameters to determine the traction time of each vehicle. Based on the traction time, it determines the departure order of the two vehicles: the vehicle with the longer traction time departs first, and the timer starts synchronously. When the timer's duration equals the difference in traction time, the vehicle with the shorter traction time departs. Afterward, the traction times of the two vehicles are equal, and they arrive at the collision point simultaneously.

[0054] As one possible approach, test parameters include vehicle information and collision angle.

[0055] The PLC controller 11 is also used to simulate and calculate the collision position of the two vehicles based on their vehicle information and collision angle, and send the result to the host computer 10.

[0056] The host computer 10 is also used to show users the collision locations of the two vehicles.

[0057] In this embodiment, considering that in many cases, collision tests need to simulate collisions at specific locations on the vehicle body, such as headlights colliding or headlights of one vehicle hitting the door of another, it is difficult to determine the collision angle due to the varying lengths and widths of different vehicle models. This requires multiple actual adjustments, which is time-consuming and labor-intensive. The PLC controller 11 of this system has a collision simulation function. Based on the vehicle information and collision angle input by the user, it can simulate and calculate the collision position of two vehicles. The host computer 10 displays the collision process through text, diagrams, or video simulations, allowing staff to clearly and intuitively determine the collision position. If the collision position does not meet the expected requirements, the collision angle can be adjusted.

[0058] In one embodiment, vehicle information may also include the vehicle's chassis height. Different chassis heights result in different collision locations, and staff adjust the chassis height based on simulation results and collision requirements.

[0059] As one possible implementation, see Figure 2 As shown, each traction device includes a track 20, a traction rope 21, a traction trolley 22, and a motor 23.

[0060] The traction rope 21 is wound around the hub of the motor 23 and moves by the drive of the hub; the traction trolley 22 is set on the track 20 and connected to the traction rope 21, and is used to drive the vehicle to move along the track 20 by the traction of the traction rope 21.

[0061] At least one position detection encoder 24 is also provided on the track 20 to detect the time when the vehicle reaches the position of the position detection encoder 24 during the traction acceleration process and send it to the PLC controller 11.

[0062] The PLC controller 11 is also used to provide feedback and adjust the vehicle's traction parameters based on time.

[0063] In this embodiment, the traction rope 21 is connected to the hub of the motor 23, passes through the pulley block 26, and passes through the hollow part in the middle of the track 20 to form a closed loop. The front and rear ends of the traction trolley 22 are connected to the traction rope 21, forming a closed loop with the traction rope 21, and are connected to the front end of the vehicle through a rope, driving the vehicle to run together with the traction rope 21. During the test, test parameters are input to the host computer 10, and the PLC controller 11 calculates the power and torque required by the motors in the two traction devices based on the test parameters. After receiving the signal, the DC speed controller 25 of the motor 23 drives the motor 23 to run.

[0064] To further improve accuracy, time compensation can be used to eliminate potential errors between the two traction devices, and feedback control can be implemented in the traction process. For example, see [link to example]. Figure 1 and Figure 2 As shown, position detection encoders 24 can be installed on both sides of the track in an area 10-20m away from the collision point. During the test, the PLC controller calculates the predicted time for the vehicle or traction trolley to reach the detection encoder 24 based on the input collision speed, traction acceleration, and traction trolley position. During the test, the actual time for the vehicle or traction trolley to reach the position detection encoder 24 is compared with the predicted time. If the deviation is too large, the acceleration and speed of the vehicle will be adjusted so that both vehicles reach the pre-collision point at the same time to complete the test.

[0065] As one possible implementation, see Figure 3 As shown, the traction trolley 22 is equipped with a track extension rod 30, which points in the forward direction of the traction trolley 22.

[0066] One end of the track extension rod 30 is connected to the traction trolley 22, and the other end of the track extension rod 30 is provided with a hook 31. The traction trolley 22 is connected to the vehicle through the hook 31 on the track extension rod 30.

[0067] In this embodiment, the main function of the track extension rod 30 is to allow the vehicle's release position to be as close as possible to the collision point, given the limited track length, thereby reducing the vehicle's free-slip distance. Since a certain safety distance must be maintained between the track 20 and the collision point, see [reference needed]. Figure 4As shown, before the track extension rod 30 is installed, the traction trolley 22 will disengage from the vehicle after reaching the end of the track 20, and the vehicle still needs to slide freely for a considerable distance to reach the collision point. After the track extension rod 30 is installed, the braking position of the traction trolley 22 remains unchanged, but the vehicle disengages at the hook 31 of the track extension rod 30, making the vehicle's release position closer to the collision point. This embodiment, by attaching the test vehicle to the unique track extension rod 30, reduces the free sliding distance, ensures the offset, and achieves high precision in the angled collision of the two vehicles.

[0068] As one possible implementation, see Figure 3 As shown, one end of the track extension rod 30 is connected to the traction trolley 22 via a rotating component 32, which is used to change the direction of the track extension rod 30.

[0069] In this embodiment, the collision test may require a change in the traction direction. After changing the collision direction, the direction of the track extension rod 30 also needs to be changed so that the track extension rod 30 points in the forward direction of the traction trolley 22. For convenience, the track extension rod 30 and the traction trolley 22 can be connected through a rotating component 32, so that the forward and backward directions can be quickly changed by rotation without the need to disassemble and reinstall the equipment.

[0070] As one possible implementation, see Figure 3 As shown, a connecting component 33 is provided in the middle part of the track extension rod 30. The connecting component 33 is used to lock onto the track 20 to fix the track extension rod 30.

[0071] In this embodiment, the connecting component 33 is secured to the upper layer of the track 20 by pulleys on both sides of its bottom, and is guided and fixed by the track 20 without interfering with the traction rope 21. This ensures that the direction of the track extension rod 30 is always along the track 20. (See the structural relationship section.) Figure 5 As shown. The hook 31 can be a release duckbill, which can also be locked onto the upper layer of the track 20 by pulleys on both sides of the bottom. The vehicle is directly hooked onto the release duckbill by a rope. When it approaches the collision position, the traction trolley 22 brakes, and the vehicle naturally disengages due to inertia.

[0072] As one possible implementation, the track extension rod 30 can be a straight rod with a fixed length, or the track extension rod 30 can be a telescopic rod with an adjustable length.

[0073] In this embodiment, the track extension rod 30 can be designed as an adjustable telescopic rod to cover all vehicle models. The length of the track extension rod 30 can be adjusted during testing according to different vehicle models.

[0074] This embodiment can control two sets of traction devices to achieve angular collision between two vehicles, and can monitor and correct in real time during operation. Combined with the unique track extension rod 30, it reduces the free sliding distance of the vehicles after uncoupling, ensures the collision offset, and improves the high precision of the angular collision between the two vehicles. At the same time, the track extension rod 30 can be extended or shortened according to actual conditions, covering all vehicle models and improving the overall applicability of the system.

[0075] See Figure 6 As shown, this embodiment provides a collision control method, which is applied to the PLC controller 11 in the above-mentioned two-vehicle collision test system.

[0076] The method includes:

[0077] Step S101: Obtain the test parameters for the two-vehicle collision test.

[0078] Step S102: Calculate the traction parameters and traction duration of the two vehicles based on the test parameters.

[0079] Step S103: Based on the traction parameters and traction duration of the two vehicles, the first traction device and the second traction device are controlled sequentially to traction and accelerate the two vehicles, so that the two vehicles reach the preset collision point simultaneously.

[0080] As one possible implementation, based on the traction parameters and traction duration of the two vehicles, the first and second traction devices are controlled sequentially to accelerate and traction the two vehicles, which can be detailed as follows:

[0081] Calculate the difference in traction time based on the traction time of the two vehicles;

[0082] By controlling the start-up time of the motors in the two traction devices, the vehicle with the longer traction time is controlled to accelerate first, and after the acceleration time of the vehicle reaches the difference in traction time, the vehicle with the shorter traction time is controlled to accelerate, so that the two vehicles reach the preset collision point at the same time; wherein, during traction acceleration, the power and torque of the motors in the traction devices are controlled by the traction parameters.

[0083] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0084] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A two-vehicle collision test system, characterized in that, include: Host computer, PLC controller, first traction device and second traction device; The host computer is used to receive the test parameters input by the user and send them to the PLC controller; The PLC controller is used to calculate the traction parameters and traction duration of the two vehicles according to the test parameters, and to control the first traction device and the second traction device to traction and accelerate the two vehicles in turn, so that the two vehicles reach the preset collision point at the same time. Each traction device includes a track, a traction rope, a traction trolley, and a motor; the traction rope is wound around the hub of the motor and moves by the drive of the hub; the traction trolley is set on the track and connected to the traction rope, and is used to drive the vehicle to move along the track by the traction of the traction rope. The traction trolley is equipped with a track extension rod, which points in the forward direction of the traction trolley; one end of the track extension rod is connected to the traction trolley, and the other end of the track extension rod is equipped with a hook, through which the traction trolley is connected to the vehicle. One end of the track extension rod is connected to the traction trolley via a rotating component; the rotating component is used to change the direction of the track extension rod. The middle part of the track extension rod is provided with a connecting component; the connecting component is used to lock onto the track to fix the track extension rod.

2. The two-vehicle collision test system as described in claim 1, characterized in that, The PLC controller is specifically used for: Calculate the difference in traction time based on the traction time of the two vehicles; By controlling the start-up time of the motors in the two traction devices, the vehicle with the longer traction time is controlled to accelerate first, and after the traction acceleration time of the vehicle reaches the difference in traction time, the vehicle with the shorter traction time is controlled to accelerate, so that the two vehicles reach the preset collision point at the same time; during traction acceleration, the PLC controller controls the power and torque of the motors in the traction devices through traction parameters.

3. The two-vehicle collision test system as described in claim 1, characterized in that, The test parameters include vehicle information and collision angles of the two vehicles; The PLC controller is also used to simulate and calculate the collision position of the two vehicles based on the vehicle information and collision angle of the two vehicles and send it to the host computer. The host computer is also used to display the collision location of the two vehicles to the user.

4. The two-vehicle collision test system as described in any one of claims 1-3, characterized in that, At least one position detection encoder is also installed on the track to detect the time when the vehicle reaches the position of the position detection encoder during traction acceleration and send it to the PLC controller. The PLC controller is also used to provide feedback and adjust the vehicle's traction parameters based on the time.

5. The two-vehicle collision test system as described in claim 1, characterized in that, The track extension rod is a straight rod with a fixed length, or the track extension rod is a telescopic rod with an adjustable length.

6. A collision control method, characterized in that, The method is applied to the PLC controller in the two-vehicle collision test system as described in any one of claims 1-5; The method includes: Obtain the test parameters for the two-vehicle collision test; Based on the test parameters, calculate the traction parameters and traction duration for the two vehicles; Based on the traction parameters and traction duration of the two vehicles, the first and second traction devices are controlled sequentially to accelerate the two vehicles, so that the two vehicles reach the preset collision point simultaneously.

7. The collision control method as described in claim 6, characterized in that, Based on the traction parameters and traction duration of the two vehicles, the first and second traction devices are controlled sequentially to accelerate and traction the two vehicles, including: Calculate the difference in traction time based on the traction time of the two vehicles; By controlling the start-up time of the motors in the two traction devices, the vehicle with the longer traction time is controlled to accelerate first, and after the traction acceleration time of the vehicle reaches the difference in traction time, the vehicle with the shorter traction time is controlled to accelerate, so that the two vehicles reach the preset collision point at the same time; wherein, during traction acceleration, the power and torque of the motors in the traction devices are controlled by traction parameters.

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