A side pole crash trolley test device and method

Abstract

The application provides a side column collision trolley test device, which comprises a trolley for simulating vehicle non-deformation region collision acceleration, a seat installed on the trolley and a side column for impacting the seat, the seat is located in front of the side column, the side column impacts the side wall of the seat through a motion device, and the side column comprises a column head and a supporting panel installed on the column head, the supporting panel is hinged with the column head to form a V-shaped impact seat side wall. The application has the beneficial effects that the side column collision trolley test device can accurately reproduce the side column collision of the vehicle side wall, and can also independently control multiple degrees of freedom according to different invasion motion processes of different contact parts of the vehicle door and the passenger.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile collision test, and particularly relates to a side column collision bench test device and method. BACKGROUND

[0002] The bench collision test simulates the collision working condition by reproducing the vehicle body acceleration in the actual vehicle collision process. Compared with the actual vehicle collision test, the bench collision test has lower requirements for samples, shorter test period and lower test cost, and therefore has become an important automobile safety test development method.

[0003] In the front collision, the front end of the vehicle is deformed, and the passenger compartment is almost not deformed. The passenger compartment as a whole bears the acceleration transmitted from the front end, so the main factor causing the injury of the passenger is the impact of the vehicle body acceleration. The existing bench collision test equipment and test technology are also basically based on the above principle, that is, the vehicle body acceleration is reproduced by technical means, and then the collision process is reproduced. However, in the side collision working condition, the side wall of the vehicle invades and deforms inwardly and extrudes the passenger, and the injury of the passenger is caused by the double factors of collision acceleration impact and side wall invasion. The existing bench collision equipment cannot reproduce the invasion, so the side collision bench test is not feasible. Especially in the side column collision, since the collision barrier is column-shaped, the deformation mode of the side wall of the vehicle is not translational invasion, but the invasion amount and speed of each part are different. From the top view, the side wall invades in a "V-shaped" mode with deep middle and shallow sides, so that the side column collision process is more complex and more difficult to control.

[0004] With the improvement of automobile safety technology and the requirements of related standards and regulations, the demand for side column collision bench test is higher and higher, but the technical method is not mature, so a new technical method is needed to realize the simulation of the vehicle body acceleration and the deformation amount in the bench collision test, and provide a side column collision bench test method with higher precision. INVENTION CONTENTS

[0005] Therefore, the application aims to provide a side column collision bench test device and method, so that the bench test can simulate the side column collision test of the actual vehicle with high precision, provide a side column collision bench test method with high efficiency and low cost, and enrich the side column collision development and verification test method.

[0006] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0007] A side column collision bench test device, comprising a bench for simulating the acceleration of the non-deformation region of a vehicle, a seat installed on the bench, and a side column for impacting the seat.

[0008] The seat is located in front of the side column, and the side column impacts the side wall of the seat through a motion device.

[0009] The side column includes a column head and a support panel mounted on the column head, and the support panel is hinged with the column head to form a V-shaped impact seat side wall.

[0010] Further, the motion device includes a plurality of intrusion cylinders, and each cylinder rod end of each intrusion cylinder is connected with a side column, and the plurality of side columns are arranged in the same collision plane and located on the side of the seat.

[0011] Further, the motion device is installed on the trolley through a mounting frame, a plurality of cross beams are installed on the mounting frame, the plurality of cross beams are adjustable in position, and the plurality of intrusion cylinders are installed in the middle part of the corresponding cross beams.

[0012] Further, the support panel includes a rear support panel and a front support panel, the column head is installed at the cylinder rod end of the corresponding intrusion cylinder through the piston head, the rear support panel and the front support panel are installed on both sides of the column head, one end of the rear support panel is hinged with the column head, the other end is installed on the mounting frame through a first sliding hinge, and one end of the front support panel is hinged with the column head, the other end is installed on the mounting frame through a second sliding hinge.

[0013] Further, a mounting seat is installed between one end of the rear support panel and the mounting frame, and an included angle is formed between the support panel and the mounting seat.

[0014] Further, the seat is installed obliquely relative to the mounting frame, and the side column is installed horizontally relative to the seat.

[0015] A side column impact trolley test intrusion system, the intrusion system comprises: a control system, an acceleration sensor, a valve assembly;

[0016] The valve assembly is used to control the intrusion cylinder to push out;

[0017] The acceleration sensor is used to obtain the acceleration signal of the intrusion cylinder pushing out, and the speed signal and the displacement signal can be calculated;

[0018] The control system is used to obtain the feedback signal of the sensor and control the action of the valve assembly;

[0019] The intrusion cylinder has a piston, and the end of the piston is connected with a sensor;

[0020] The valve assembly includes a multi-way combination valve assembly, an accumulator, and a mobile hydraulic source, the front and rear ends of the intrusion cylinder are connected with the multi-way combination valve assembly through a servo valve, the multi-way combination valve assembly is connected with the high-pressure accumulator and the low-pressure accumulator of the accumulator, and is connected with the mobile hydraulic source.

[0021] A side column impact trolley test method, comprising the following steps:

[0022] S1, adjust the position of the intruding cylinder and the occupant on the seat;

[0023] S2, install the door inner panel on the support panel at the end of the intruding cylinder for simulating a real door;

[0024] S3, obtain the acceleration signal G s (t) as the control target, and each group of intruding cylinders is controlled to push out according to the intruding speed function V i (t);

[0025] S4, obtain the real acceleration signal, speed signal and displacement signal during the current bench test.

[0026] Further, the adjustment of the position of the intruding cylinder and the occupant on the seat in step S1 is as follows:

[0027] Adjust and fix the front and rear positions of the three groups of intruding cylinders, and align the positions with the collision surface in the side column collision of the real vehicle;

[0028] Adjust and fix the height positions of the three groups of intruding cylinders, and align the lower intruding cylinder with the height of the occupant H point;

[0029] Align the middle intruding cylinder with the height of the chest and abdomen of the occupant, and align the upper intruding cylinder with the height of the shoulder of the occupant.

[0030] Further, in step S3, the method for obtaining the control target function in the real vehicle collision test is as follows:

[0031] In the side column collision test of the real vehicle, the Y-direction acceleration signal a0(t) of the lower end of the B column on the non-collision side is collected; on the inner panel of the door on the collision side, the Y-direction collision acceleration signals a i (i=1, 2, 3) of the inner panel of the door during collision are collected at the X and Z coordinate positions of the three groups of intruding cylinders.

[0032] Bench acceleration control target:

[0033] Intruding cylinder intruding speed control target:

[0034] Wherein, the upper intruding cylinder corresponds to the subscript i=1, the middle intruding cylinder corresponds to the subscript i=2, and the lower intruding cylinder corresponds to the subscript i=3.

[0035] Compared with the prior art, the side column collision bench test device and method provided by the application has the following advantages:

[0036] (1) The side pole collision trolley test device of the present application can accurately reproduce the intrusion of the side pole collision of a vehicle, and can also independently control the multi-degree-of-freedom according to the different intrusion movement processes of different contact parts of the vehicle door and the occupant.

[0037] (2) The side pole collision trolley test method of the present application clearly defines the test environment building and the control target acquisition method of each degree-of-freedom, so that the trolley side pole collision test and the real vehicle side pole collision test have similar test inputs and test results. The reproducibility and test accuracy of the trolley side pole collision test are improved, and it is easy to implement, which provides a low-cost and high-precision trolley test method for vehicle side protection development and verification. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which form a part of the present application, are used to provide a further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The accompanying drawings do not constitute an improper limitation of the present application. In the drawings:

[0039] Figure 1 An isometric view of a side pole collision trolley test device according to an embodiment of the present application;

[0040] Figure 2 A top view of a side pole collision trolley test device according to an embodiment of the present application;

[0041] Figure 3 A top view of a side pole collision trolley test device according to an embodiment of the present application when the intrusion cylinder is extended;

[0042] Figure 4 An intrusion system architecture diagram according to an embodiment of the present application.

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] 01, trolley; 02, mounting frame; 03, intrusion cylinder; 04, piston head; 05, column head; 06, rear support panel; 07, first sliding hinge; 08, front support panel; 09, second sliding hinge; 10, seat. DETAILED DESCRIPTION

[0045] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0046] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0047] As Figures 1 to 3As shown in the drawings, a side pole collision trolley test device comprises a trolley for simulating the acceleration of the non-deformation area of a vehicle, a seat installed on the trolley, and a side pole impacting the seat;

[0048] The seat is located directly in front of the side pole, and the side pole impacts the side wall of the seat through a movement device;

[0049] The side pole comprises a pole head, a support panel installed on the pole head, and the support panel is hinged to the pole head to form a V-shaped impact on the side wall of the seat.

[0050] The trolley is installed on a slide rail for simulating a moving state, and the specific installation means uses prior art which will not be described in detail here, such as a slide rail installed on the ground, the slide rail is provided with a slide block mounting seat, and the trolley is fixed on the mounting seat.

[0051] Preferably, the movement device comprises a plurality of intrusion cylinders, and the cylinder rod end of each intrusion cylinder is connected with a side pole, and the plurality of side poles are arranged in a collision surface and located on the side of the seat.

[0052] Preferably, the movement device is installed on the trolley through a mounting frame, a plurality of cross beams are installed on the mounting frame, the plurality of cross beams are adjustable in position, and a plurality of intrusion cylinders are installed in the middle part of the corresponding cross beams.

[0053] Preferably, the support panel comprises a rear support panel and a front support panel, the pole head is installed on the cylinder rod end of the corresponding intrusion cylinder through a piston head, the rear support panel and the front support panel are installed on both sides of the pole head, one end of the rear support panel is hinged to the pole head, the other end is installed on the mounting frame through a first sliding hinge, and one end of the front support panel is hinged to the pole head, the other end is installed on the mounting frame through a second sliding hinge.

[0054] A mounting seat is further installed between one end of the rear support panel and the mounting frame, and an included angle is formed between the support panel and the mounting seat.

[0055] The seat is installed obliquely relative to the mounting frame, and the side pole is installed horizontally relative to the seat.

[0056] As shown in Figure 1 and Figure 2 A mounting seat is provided between the rear support panel and the mounting frame, so that an included angle is formed between the support panel and the mounting frame, and in this application, an included angle of 15 degrees is taken as an example.

[0057] In a real vehicle side pole collision test, there is an included angle between the collision direction and the vehicle direction, resulting in an included angle between the intrusion direction and the vehicle direction. The trolley test reproduces the real vehicle collision, so that an included angle is formed between the support panel and the mounting frame to reproduce the angle and make it closer to the real collision.

[0058] An intrusion system for a side pole crash sled test, for controlling a side pole crash sled test device, the intrusion system comprising: a control system, an acceleration sensor, a valve assembly;

[0059] The valve assembly is used to control the intrusion cylinder to push out;

[0060] The acceleration sensor is used to obtain the acceleration signal of the intrusion cylinder pushing out, and the speed signal and displacement signal can be calculated;

[0061] The control system is used to obtain the feedback signal of the sensor and control the action of the valve assembly;

[0062] The intrusion cylinder has a piston, and the acceleration sensor is connected to the end of the piston;

[0063] The valve assembly includes a multi-way combination valve assembly, an accumulator, and a mobile hydraulic source. The front and rear ends of the intrusion cylinder are connected to the multi-way combination valve assembly through servo valves. The multi-way combination valve assembly is connected to the high-pressure accumulator and the low-pressure accumulator of the energy storage device, and is connected to the mobile hydraulic source.

[0064] As shown in Figure 4 The intrusion cylinder has a piston, and the displacement and speed data collected by the displacement speed sensor connected to the rear end of the piston are fed back to the control system for closed-loop control. The control system controls the opening degree of the servo valves at the front and rear ends of the intrusion cylinder based on the preset logic and the feedback signals to control the flow and speed of the hydraulic oil, and thus obtains the required piston positive pressure and back pressure. The two ends of the servo valve are connected to the multi-way combination valve assembly. The combination valve is also connected to the high-pressure accumulator and the low-pressure accumulator, so that the hydraulic oil will not be rapidly depressurized during high-speed operation; and the mobile hydraulic source provides power and energy for the entire system.

[0065] A side pole crash sled test method, comprising the following steps:

[0066] S1, adjusting the position of the intrusion cylinder and the occupant on the seat;

[0067] S2, installing the door trim panel on the support panel at the end of the intrusion cylinder to simulate a real door;

[0068] S3, according to the acceleration signal G s (t) obtained in the real vehicle crash test, as the control target, each intrusion cylinder is controlled to push out according to the intrusion speed function V i (t);

[0069] S4, simultaneously obtaining the real acceleration signal, speed signal, and displacement signal during the current sled test.

[0070] Preferably, in step S1, the position of the intrusion cylinder and the occupant on the seat is adjusted as follows:

[0071] Adjust and fix the front and back positions of the three groups of intrusion cylinders, and align with the impact surface position in the real vehicle side column impact;

[0072] Adjust and fix the height positions of the three groups of intrusion cylinders, and align the lower intrusion cylinder with the height of the occupant H point;

[0073] The middle intrusion cylinder is aligned with the height of the occupant's chest and abdomen, and the upper intrusion cylinder is aligned with the height of the occupant's shoulder.

[0074] Preferably, in step S3, the method for obtaining the target function in the real vehicle crash test is:

[0075] In the real vehicle side column impact test, the Y-direction acceleration signal a0(t) of the lower end of the B-pillar on the non-impact side is collected; on the inner panel of the door on the impact side, three groups of Y-direction impact acceleration signals a i (t) are collected at the X and Z coordinate positions of the three groups of intrusion cylinders (i=1, 2, 3).

[0076] Rolling rig acceleration control target:

[0077] Intrusion cylinder intrusion speed control target:

[0078] Wherein, the upper intrusion cylinder corresponds to the subscript i=1, the middle intrusion cylinder corresponds to the subscript i=2, and the lower intrusion cylinder corresponds to the subscript i=3.

[0079] Preferably, in step S4, the impact acceleration signal in the rolling rig test is obtained through a displacement speed sensor, and then the speed signal and the displacement signal are calculated, wherein the calculation of the speed signal and the displacement signal adopts conventional technical means, which is a conventional technical means in the field of crash test, and will not be described in detail here.

[0080] The specific structure is introduced as follows:

[0081] A set of controllable test devices is added to the accelerating rolling rig, which can realize the motion mode of simulating the intrusion of the vehicle side in the real vehicle side column impact test. Through a real vehicle side column impact basic test, the related acceleration data of the vehicle body are obtained, and the data are calculated and converted into control targets of each motion degree of freedom in the rolling rig side column impact test. By building a test environment on the rolling rig, the collision process is simulated, and finally the rolling rig side column impact test and the real vehicle side column impact test have comparability.

[0082] The test device provided by the application is based on an accelerated sliding table test equipment, a frame 02 with sufficient rigidity is installed on a trolley 01. A hydraulic servo-controlled intrusion cylinder 03 is arranged at different height positions on the frame 02, and there are three groups in total. The height and front and back (perpendicular to the horizontal direction of the trolley movement) positions of each group of intrusion cylinders can be adjusted to match the positions of different test samples and test requirements. The minimum center distance of the adjacent two groups of intrusion cylinders in the height direction is not more than 200 mm. The front end of each group of intrusion cylinders is provided with a retractable piston head 04, and the maximum extension amount of the piston is not less than 300 mm. The piston head 04 is screwed with a post head 05, the curvature radius of the cylindrical impact surface of the post head is 127 mm, and the post head is hinged with a rear support panel 06 and a front support panel 08 at the center of the cylindrical impact surface. When the piston 04 is not extended, that is, in the initial position, the rear support panel 06 and the front support panel 08 are in the same plumb plane, the plane is tangent to the cylindrical impact surface 05, and the plane normal (Y direction) is at an angle of 15° with the trolley movement direction. The rear support panel 06 is connected with the rigid support frame extending from the frame 02 through a sliding hinge 07, and the front support panel 08 is connected with the rigid support frame extending from the frame 02 through a sliding hinge 09. During the test, the intrusion cylinder 03 is actuated, and as the piston 04 is extended, the cylindrical impact surface 05 is also extended, the rear support panel 06 rotates around the sliding hinge 07 while sliding along the support panel, and the front support panel 08 rotates around the sliding hinge 09 while sliding along the support panel. The whole door panel part intrudes close to the seat 10 in a “V-shaped” manner to simulate the side intrusion mode in the side column impact.

[0083] 03 The actuation of the intrusion cylinder is controlled by a hydraulic servo, and the system architecture is as follows Figure 4 The intrusion cylinder has a piston, the rear end of the piston is connected with a displacement speed sensor, and the collected displacement and speed data are fed back to the control system for closed-loop control. The control system controls the opening degree of the servo valves at the front end and the rear end of the intrusion cylinder based on the preset logic and the feedback signals to control the flow and flow rate of the hydraulic oil, and then obtains the required piston positive pressure and back pressure. The two end servo valves are connected to a multi-way combination valve assembly, a high-pressure accumulator and a low-pressure accumulator are also connected to the combination valve, so that the hydraulic oil will not be rapidly depressurized during high-speed actuation; and a mobile hydraulic source provides power and energy for the whole system.

[0084] The test method provided by the application is as follows:

[0085] Before the test, the front and back positions of the three groups of intrusion cylinders are adjusted and fixed to be aligned with the impact surface position in the side column impact of the actual vehicle.

[0086] The height positions of the three groups of intrusion cylinders are adjusted and fixed, the lower intrusion cylinder is aligned with the height of the occupant H point, the middle intrusion cylinder is aligned with the height of the occupant's chest and abdomen, and the upper intrusion cylinder is aligned with the height of the occupant's shoulder, and the height positions of the front and rear sliding hinges 07 and 09 should be adjusted and fixed at the same time.

[0087] The door inner panel is installed on the front and rear support panels 06 and 08, and the relative position thereof to the collision line should be equal to the relative position relationship between the collision line and the door inner panel in the actual vehicle collision.

[0088] The test seat 10 is fixed on the table top 02, and the front and rear directions thereof are parallel to the X direction, and the relative position of the seat to the door inner panel should be equal to the relative position relationship between the seat and the door inner panel in the actual vehicle.

[0089] The test dummy is installed on the seat according to the test requirements.

[0090] During the test, the trolley 01 is launched by using the acceleration signal G s (t) as the control target. At the same time, each group of intrusion cylinders is controlled to be pushed out according to the intrusion velocity function V i (t), and the upper intrusion cylinder corresponds to the subscript i=1, the middle intrusion cylinder corresponds to the subscript i=2, and the lower intrusion cylinder corresponds to the subscript i=3.

[0091] The control target function is obtained by the following method:

[0092] In the actual vehicle side column collision test, the Y-direction acceleration signal a0(t) of the lower end of the B column on the non-collision side is collected; on the door inner panel on the collision side, the Y-direction collision acceleration signals a i (i=1, 2, 3) of the door inner panel during the collision are collected at the X and Z coordinate positions corresponding to the three groups of intrusion cylinders.

[0093] Trolley acceleration control target:

[0094] Intrusion cylinder intrusion velocity control target:

[0095] Finally, the intrusion cylinder movement is controlled according to the data obtained from the actual vehicle, and the collision acceleration signal, the velocity signal and the displacement signal of the intrusion cylinder are obtained and fed back to the control system.

[0096] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A test method using a side pole impact sled test device, characterized by, The device comprises a trolley (01) for simulating vehicle non-deformation region collision acceleration, a seat installed on the trolley (01), and a side column impacting the seat (10); The seat is located directly in front of the side column, and the side column impacts the side wall of the seat through a motion device; The side column comprises a column head (05), a support panel installed on the column head (05), and the support panel is hinged with the column head (05) to form a V-shaped impact on the side wall of the seat; The motion device comprises a plurality of invasion cylinders (03), and the cylinder rod end of each invasion cylinder (03) is connected with a side column, respectively, and the plurality of side columns are arranged in the same collision surface and located on the side of the seat (10); The motion device is installed on the trolley (01) through a mounting frame (02), a plurality of groups of cross beams are installed on the mounting frame (02), the positions of the plurality of groups of cross beams are adjustable up and down, and the plurality of invasion cylinders (03) are installed in the middle parts of the corresponding cross beams; The support panel comprises a rear support panel (06) and a front support panel (08), the column head (05) is installed at the cylinder rod end of the corresponding invasion cylinder (03) through a piston head (04), the rear support panel (06) and the front support panel (08) are installed on both sides of the column head (05), one end of the rear support panel (06) is hinged with the column head (05), the other end is installed on the mounting frame (02) through a first sliding hinge (07), and one end of the front support panel is hinged with the column head (05), the other end is installed on the mounting frame (02) through a second sliding hinge (09); The method comprises the following steps: S1, adjusting the positions of the invasion cylinders and the passengers on the seat; S2, installing the door trim on the support panel at the end of the invasion cylinder to simulate the real vehicle door; S3. Acceleration signals acquired in real vehicle crash tests Fired as control targets, each group of intruding cylinders according to an intrusion velocity function Pushed out under control; S4, simultaneously acquiring the real acceleration signal, speed signal and displacement signal in the trolley test process; In step S3, the method for acquiring the target function in the real vehicle collision test is: In the real vehicle side column impact test, the Y-direction acceleration signal of the lower end of the B column on the non-impact side is collected ; on the impact side of the vehicle door inner plate, three groups of Y-direction impact acceleration signals of the vehicle door inner plate during impact are collected at the X and Z coordinate positions corresponding to the three groups of intrusion cylinders ; Trolley acceleration control target: ; Intrusion cylinder intrusion speed control target: ; where the upper invading cylinder corresponds to the superscript , the middle invading cylinder corresponds to the superscript , and the lower invading cylinder corresponds to the superscript .

2. The test method of claim 1, wherein: An installation seat is further installed between one end of the rear support panel (06) and the mounting frame (02), and an included angle is formed between the support panel and the installation seat.

3. The test method of claim 1, wherein: The seat is installed obliquely relative to the mounting frame (02), and the side column is installed horizontally relative to the seat.

4. The test method of claim 1, wherein: In step S1, the positions of the invasion cylinders and the passengers on the seat are adjusted as follows: Adjust and fix the front and rear positions of the three groups of invasion cylinders, and align the positions with the collision surface in the side column impact; Adjust and fix the height positions of the three groups of invasion cylinders, and align the lower invasion cylinder with the height of the passenger H point; The middle invasion cylinder is aligned with the height of the passenger's chest and abdomen, and the upper invasion cylinder is aligned with the height of the passenger's shoulder.

5. A side pole impact sled test intrusion system for use in controlling a test apparatus to which the test method of claim 1 is applied, characterized by, The invasion system comprises a control system, an acceleration sensor and a valve assembly; The valve assembly is used for controlling the pushing out of the invasion cylinder; The acceleration sensor is used for acquiring the acceleration signal of the pushing out of the invasion cylinder; The control system is used for acquiring the feedback signal of the acceleration sensor and controlling the actuation of the valve assembly; The invasion cylinder has a piston, and the end of the piston is connected with a sensor; The valve assembly comprises a multi-way combination valve assembly, an accumulator and a mobile hydraulic source, the front and rear ends of the invasion cylinder are connected with the multi-way combination valve assembly through a servo valve, the multi-way combination valve assembly is connected with the high-pressure accumulator and the low-pressure accumulator of the energy accumulator, and is connected with the mobile hydraulic source.

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