Using method of high-flexibility contact collision test device

Abstract

The invention discloses a use method of a high-flexibility contact collision test device, and belongs to the technical field of collision tests. The use method of the high-flexibility contact collision test device comprises the following steps: mounting a passive collision test piece, clamping an active collision test piece, adjusting the spatial position of the multi-purpose release device, arranging the non-contact vision measurement device and collecting collision process data. The problem that in the prior art, the measuring function is single is solved. According to the invention, by arranging the variable-angle support, collision tests of different inclination directions and angles can be flexibly carried out; by changing the shapes, angles and orientations of the active impact test piece and the passive impact test piece, the research on response change rules of point / line, positive / oblique and coaxial / non-coaxial impact processes is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of collision tests, in particular to a method for using a high-flexibility contact collision test device. Background Art

[0002] At present, in the field of contact collision testing, the design of most existing devices is relatively simple, and they can usually only study specific types of collisions, such as fixed collision angles or collisions of specimens of specific materials. Such devices are difficult to adapt to a variety of collision scenarios, especially when studying the energy loss mechanism of point / line, normal / oblique, coaxial / non-coaxial collisions during the contact collision between two objects. Due to the lack of flexibility and versatility, these devices cannot meet the needs of in-depth exploration of different collision states and their energy conversion laws, which limits the development of collision mechanics research. Summary of the invention

[0003] The purpose of the present invention is to provide a method for using a highly flexible contact collision test device, by setting a variable angle support to change the inclination angle and orientation of a passive impact specimen, and by changing the shapes of an active impact specimen and a passive impact specimen, collision tests of different materials, different inclination orientations and angles can be flexibly carried out, which is beneficial to the study of the response change law of point / line, normal / oblique, coaxial / non-coaxial collision processes, and solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A method for using a high-flexibility contact collision test device comprises the following steps:

[0006] S1. Install the passive collision specimen: enter the high-strength aluminum alloy frame through the device door, install the variable angle support and force sensor required for the test, fix the variable angle support on the steel plate fixed base, connect the force sensor to the variable angle support through screws, and screw the passive collision specimen into the threaded hole of the force sensor;

[0007] S2. Clamping the active collision specimen: The test personnel place the active collision specimen between the electrically controlled clamping rods of the specimen clamping device, and use the remote control signal device to control the extension and retraction of the electrically controlled clamping rods to achieve the fixation and release of the active collision specimen, ensuring that the center of mass of the active collision specimen is flush with the clamping rods.

[0008] S3. Adjust the spatial position of the multi-purpose release device: realize the spatial movement of the multi-purpose release device through the control panel, specifically: move up and down along the three-dimensional lifting rod, move horizontally along the X-axis moving platform, and the test personnel leave the high-strength aluminum alloy frame and close the device door to prevent the active collision specimen from accidentally popping out;

[0009] S4. Arrange non-contact visual measurement device: Arrange two high-speed cameras outside the high-strength aluminum alloy frame. The optical axis angle of the high-speed camera is between 20° and 50°, and the optical axis is in the same plane as the passive collision specimen;

[0010] S5. Data collection during collision: Use a remote control signal device to control the contraction of the electric control clamp rod, so that the active collision specimen is released freely without initial velocity, and vertically impacts the passive collision specimen downward. The collision force change data is captured by the force sensor, and the full-field deformation data is obtained by the high-speed camera.

[0011] Preferably, with respect to S1, types of passive collision specimens include flat plates, cylindrical specimens, smooth curved surfaces, and complex curved surfaces.

[0012] Preferably, with respect to S2, types of active collision specimens include spherical specimens and cylindrical specimens.

[0013] A highly flexible contact collision test device comprises a structural outer frame, an electrically controlled lifting device, a multi-purpose releasing device, a collision assembly and a non-contact visual measuring device, wherein the structural outer frame comprises a high-strength aluminum alloy frame, a transparent acrylic plate and a steel plate fixing base, the high-strength aluminum alloy frame is covered with a transparent acrylic plate on all sides, a steel plate fixing base is provided at the bottom of the high-strength aluminum alloy frame, the steel plate fixing base is fixed to the ground by expansion screws, and the steel plate fixing base is connected to the high-strength aluminum alloy frame by rivets.

[0014] Preferably, the electric-controlled lifting device includes a main electrical box and a three-dimensional lifting rod. The main electrical box is installed on one side of the interior of the high-strength aluminum alloy frame. A control panel is provided on the outside of the main electrical box. The three-dimensional lifting rod is located inside the high-strength aluminum alloy frame, and its bottom is connected to a steel plate fixed base. Both sides of the three-dimensional lifting rod are fixed to the high-strength aluminum alloy frame.

[0015] Preferably, the multi-purpose releasing device comprises an X-axis moving platform, a Y-axis moving platform and a specimen clamping device, the X-axis moving platform and the Y-axis moving platform are connected by a nut, and the X-axis moving platform and the Y-axis moving platform are connected to the three-dimensional lifting rod by a sliding member.

[0016] Preferably, the collision assembly includes an active collision specimen, a passive collision specimen, a force sensor and a variable angle support, the active collision specimen is clamped on a specimen clamping device, the variable angle support is installed on a steel plate fixed base, the upper part of the variable angle support is threadedly connected to the force sensor, the upper part of the force sensor is threadedly connected to the passive collision specimen, and the passive collision specimen is located directly below the active collision specimen.

[0017] Preferably, the non-contact visual measurement device includes a high-speed camera and a synchronous trigger device. There are two high-speed cameras and they are placed on the ground through a tripod. The angle between the optical axes of the two high-speed cameras should be between 20° and 50° and they should be in the same plane as the passive collision specimen. The high-speed camera is connected to the synchronous trigger device by signal.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention realizes non-destructive clamping and free release without initial velocity of active collision specimens of multiple materials and shapes by controlling the extension and retraction of the clamp rod; the flexible coordination of the three-dimensional lifting rod with the X-axis and Y-axis horizontal moving platforms can realize the contact collision test research of two objects in multiple positions with a wide initial velocity; the variable angle base design can flexibly adjust the tilt direction and angle, which is convenient for conducting the research on the energy loss mechanism of point / line, positive / oblique, coaxial / non-coaxial collision processes; the non-contact visual measurement device adopts high-precision visual measurement technology to obtain full-field deformation data, avoiding the influence of traditional contact measuring instruments on the test results.

[0020] 2. The types of active collision specimens and passive collision specimens in the present invention can enable the device to perform multiple types of collision tests. The types of active collision specimens include spherical and cylindrical specimens, and the types of passive collision specimens include flat plates, cylindrical specimens, smooth curved surfaces, and complex curved surfaces. When the active collision specimen is a spherical or cylindrical specimen, point / line contact collision tests can be simulated respectively; when the active collision specimen is a spherical specimen and the passive collision specimen is a flat plate, the device can realize positive / oblique collision tests by adopting different variable angle supports; when the active collision specimen and the passive collision specimen are both cylindrical, the coaxial / non-coaxial collision test can be realized by adjusting the position of the variable angle base. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric diagram of the overall structure of the present invention;

[0022] Figure 2 It is a partial structural axonometric diagram of the present invention;

[0023] Figure 3 The variable angle support state of the present invention Figure 1 ;

[0024] Figure 4 The variable angle support state of the present invention Figure 2 ;

[0025] Figure 5 The variable angle support state of the present invention Figure 3 ;

[0026] Figure 6 The variable angle support state of the present invention Figure 4 ;

[0027] Figure 7 It is the state diagram of the point contact test of the present invention;

[0028] Figure 8 It is the state diagram of the line contact experiment of the present invention;

[0029] Fig. 9 It is a state diagram of a head-on collision test of the present invention;

[0030] Fig.10 It is the oblique collision test state diagram of the present invention;

[0031] Fig.11 It is the state diagram of the coaxial collision test of the present invention;

[0032] Fig.12 This is a state diagram of the non-coaxial collision test of the present invention.

[0033] In the figure: 1. Structural frame; 101. High-strength aluminum alloy frame; 102. Transparent acrylic plate; 103. Steel plate fixing base; 104. Device door; 2. Electric-controlled lifting device; 201. Main electrical box; 202. Control panel; 203. Three-dimensional lifting rod; 3. Multi-purpose release device; 301. X-axis moving platform; 302. Y-axis moving platform; 303. Specimen clamping device; 4. Collision assembly; 401. Active collision specimen; 402. Passive collision specimen; 403. Force sensor; 404. Variable angle support; 5. Non-contact visual measurement device; 501. Tripod; 502. High-speed camera. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] In order to solve the problem that the existing collision test equipment cannot adapt to various collision forms and cannot conduct research on a wide range of initial velocities and different collision locations, please refer to Figure 1-2 , this embodiment provides the following technical solutions:

[0037] A method for using a high-flexibility contact collision test device comprises the following steps:

[0038] S1. Install the passive collision specimen 402: Enter the high-strength aluminum alloy frame 101 through the device door 104, install the variable angle support 404 and the force sensor 403 required for the test, the variable angle support 404 is fixed on the steel plate fixed base 103, the force sensor 403 is connected to the variable angle support 404 by screws, and the passive collision specimen 402 is screwed into the threaded hole of the force sensor 403;

[0039] S2. Reasonably clamp the active collision specimen 401: The tester places the active collision specimen 401 between the electrically controlled clamping rods of the specimen clamping device 303, and uses a remote control signal device to control the extension and retraction of the electrically controlled clamping rods to achieve the fixation and release of the active collision specimen 401, ensuring that the center of mass of the active collision specimen 401 is flush with the clamping rods.

[0040] S3. Adjust the spatial position of the multi-purpose release device 3: The multi-purpose release device 3 is moved in space by the control panel 202, specifically: the vertical movement along the three-dimensional lifting rod 203, the horizontal movement along the X-axis moving platform 301 and the Y-axis moving platform 302, the test personnel leave the high-strength aluminum alloy frame 101, and close the device door 104 to prevent the active collision test piece 401 from accidentally popping out;

[0041] S4. Arrange the non-contact visual measurement device 5: Arrange two high-speed cameras 502 outside the high-strength aluminum alloy frame 101, the optical axis angle of the high-speed camera 502 is between 20° and 50°, and the optical axis is in the same plane as the passive collision specimen 402;

[0042] S5. Data collection during collision: A remote control signal device is used to control the contraction of the electric control clamp rod, so that the active collision specimen 401 is freely released without initial velocity and vertically impacts the passive collision specimen 402 downward. The collision force change data is captured by the force sensor 403, and the high-speed camera 502 obtains the full-field deformation data.

[0043] A highly flexible contact collision test device comprises a structural outer frame 1, wherein an electric-controlled lifting device 2 and a multi-purpose releasing device 3 are respectively arranged inside the structural outer frame 1, the electric-controlled lifting device 2 is connected to the multi-purpose releasing device 3, a collision component 4 is arranged directly below the multi-purpose releasing device 3, and a non-contact visual measuring device 5 is arranged outside the structural outer frame 1.

[0044] The structural outer frame 1 includes a high-strength aluminum alloy frame 101, a transparent acrylic plate 102, a steel plate fixing base 103 and a device door 104. The high-strength aluminum alloy frame 101 is covered with a transparent acrylic plate 102 on all sides to protect the internal collision test, prevent the active collision specimen 401 from accidentally popping out, and ensure the safety of the test personnel and surrounding measurement equipment; a steel plate fixing base 103 is provided at the bottom of the high-strength aluminum alloy frame 101, and the steel plate fixing base 103 is fixed to the ground by expansion screws. The steel plate fixing base 103 is connected to the high-strength aluminum alloy frame 101 by rivets. The steel plate fixing base 103 is used to install the passive collision specimen 402 and provide it with the stable support required for the collision test.

[0045] The electric-controlled lifting device 2 includes a main electrical box 201, a control panel 202 and a three-dimensional lifting rod 203. The main electrical box 201 is installed on one side of the interior of the high-strength aluminum alloy frame 101 and contains power switches for various devices of the device. The control panel 202 is arranged on the outside of the main electrical box 201. The three-dimensional lifting rod 203 is also located inside the high-strength aluminum alloy frame 101. The bottom of the three-dimensional lifting rod 203 is connected to the steel plate fixed base 103 through a nut, and both sides of the three-dimensional lifting rod 203 are fixed to the high-strength aluminum alloy frame 101. The main electrical box 201 is connected to the driving motor controlling the X-axis moving platform 301 and the Y-axis moving platform 302, as well as the driving motor of the specimen clamping device 303. By operating and controlling the motor on the control panel 202, the X-axis moving platform 301 and the Y-axis moving platform 302 are relatively displaced.

[0046] The multi-purpose release device 3 includes an X-axis moving platform 301, a Y-axis moving platform 302 and a specimen clamping device 303. The X-axis moving platform 301 and the Y-axis moving platform 302 are connected by nuts and driven by a motor. The X-axis moving platform 301 and the Y-axis moving platform 302 are connected to the three-dimensional lifting rod 203 by sliding parts. Through the flexible cooperation of the three-dimensional lifting rod and the X-axis moving platform 301 and the Y-axis moving platform 302, the contact collision test research of the active collision specimen 401 and the passive collision specimen 402 with a wide initial velocity and multiple positions can be realized, and the collision of the passive collision specimen 402 at different positions can be realized; the specimen clamping device 303 realizes the clamping of the active collision specimen 401 of multiple materials and shapes and the free release without initial velocity by controlling the extension and retraction of the clamping rod; the end of the electric control clamping rod is made of rubber material to reduce the deformation of the active collision specimen 401 during clamping.

[0047] See also Figure 3-6The collision assembly 4 includes an active collision specimen 401, a passive collision specimen 402, a force sensor 403 and a variable angle support 404. The active collision specimen 401 is clamped on the specimen clamping device 303, and the variable angle support 404 is installed on the steel plate fixed base 103. The upper part of the variable angle support 404 is threadedly connected to the force sensor 403, and the upper part of the force sensor 403 is threadedly connected to the passive collision specimen 402. The force sensor 403 is used to capture the collision force change data. The passive collision specimen 402 is located directly below the active collision specimen 401. The variable angle support 404 can be disassembled and replaced with support blocks of different angles and flexibly adjust the tilt direction and angle, which is convenient for conducting research on the energy loss mechanism of positive / oblique, coaxial / non-coaxial, point / line collision processes and realizing multi-angle impact tests.

[0048] The non-contact visual measurement device 5 includes a tripod 501, a high-speed camera 502, an illumination light source and a synchronous trigger device. The tripod 501 is arranged outside the high-strength aluminum alloy frame 101 to prevent accidental collision when the active collision specimen 401 rebounds and affects the test results. There are two high-speed cameras 502 and they are placed on the ground through the tripod 501. The optical axis angle of the two high-speed cameras 502 should be between 20° and 50°, and they are in the same plane as the passive collision specimen 402, and are used to measure the deformation data of the active collision specimen 401 and the passive collision specimen 402 during the entire collision process. The high-speed camera 502 is connected to the synchronous trigger device signal, and the synchronous trigger device is used to generate a control signal for image acquisition to trigger the two high-speed cameras 502 to synchronously take photos. The illumination light source is a white light or a monochrome high-brightness DC light source device.

[0049] See also Figure 7 When the active collision specimen 401 is a spherical specimen and the passive collision specimen 402 is a flat plate, a point contact collision test can be simulated, and a remote control signal device is used to control the contraction of the electric control clamp rod, so that the active collision specimen 401 is released freely without initial velocity and vertically hits the passive collision specimen 402 downward. The collision force change data is captured by the force sensor 403, and the high-speed camera 502 obtains the full-field deformation data.

[0050] Embodiment 2

[0051] See also Figure 8 The present embodiment is different from the first embodiment in that the active collision specimen 401 is a cylindrical specimen, and the passive collision specimen 402 is still a flat plate. The device can simulate a line contact collision test, and a remote control signal device is used to control the contraction of the electric control clamp rod, so that the active collision specimen 401 is released freely without initial velocity and vertically hits the passive collision specimen 402 downward. The collision force change data is captured by the force sensor 403, and the full-field deformation data is obtained by the high-speed camera 502.

[0052] Embodiment 3

[0053] See also Fig. 9 and 10 The present embodiment is different from the above-mentioned embodiment in that: when the active collision specimen 401 is a spherical specimen and the passive collision specimen 402 is a flat plate, the surface of the passive collision specimen 402 is made horizontal or inclined by changing the angle of the variable-angle support 404, so that a positive / oblique collision test can be realized, and a remote control signal device is used to control the contraction of the electric-controlled clamping rod, so that the active collision specimen 401 is freely released without initial velocity and vertically hits the passive collision specimen 402 downward, and the collision force change data is captured by the force sensor 403, and the full-field deformation data is acquired by the high-speed camera 502.

[0054] Embodiment 4:

[0055] See also Figure 11-12 The present embodiment is different from the above-mentioned embodiment in that: when the active collision specimen 401 and the passive collision specimen 402 are both cylinders, and the variable angle support 404 is adjusted in position to realize the coaxial / non-coaxial collision test; a remote control signal device is used to control the contraction of the electric control clamp rod, so that the active collision specimen 401 is released freely without initial velocity and vertically hits the passive collision specimen 402 downward, the collision force change data is captured by the force sensor 403, and the full-field deformation data is acquired by the high-speed camera 502.

[0056] Working principle: Enter the high-strength aluminum alloy frame 101 through the device door 104, install the variable angle support 404 and force sensor 403 required for the test, place the active collision specimen 401 between the electric control clamping rods of the specimen clamping device 303, use the remote control signal device to control the extension and retraction of the electric control clamping rod to achieve the fixation and release of the active collision specimen 401, ensure that the center of mass of the active collision specimen 401 is flush with the clamping rod, move up and down along the three-dimensional lifting rod 203, and move horizontally along the X-axis moving platform 301 and the Y-axis moving platform 302. The test personnel leave the high-strength aluminum alloy frame 101. Inside the alloy frame 101, the device door 104 is closed to prevent the active collision specimen 401 from accidentally popping out; two high-speed cameras 502 are arranged outside the high-strength aluminum alloy frame 101, and the optical axis angle of the high-speed camera 502 is between 20° and 50°, and the optical axis is in the same plane as the passive collision specimen 402; a remote control signal device is used to control the contraction of the electric control clamp rod, so that the active collision specimen 401 is freely released without initial velocity and vertically hits the passive collision specimen 402 downward, and the collision force change data is captured by the force sensor 403, and the high-speed camera 502 obtains the full-field deformation data.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" 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 other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A method for using a high flexibility contact collision test device, characterized in that: The following steps are involved: S1. Install the passive collision test piece (402): enter the interior of the high-strength aluminum alloy frame (101) through the device door (104), install the variable angle support (404) and the force sensor (403) required for the test, the variable angle support (404) is fixed on the steel plate fixed base (103), the force sensor (403) is connected to the variable angle support (404) by screws, and the passive collision test piece (402) is screwed into the threaded hole of the force sensor (403); S2. Clamping the active collision specimen (401): the test personnel place the active collision specimen (401) between the electrically controlled clamping rods of the specimen clamping device (303), and use a remote control signal device to control the extension and retraction of the electrically controlled clamping rods to achieve the fixation and release of the active collision specimen (401), ensuring that the center of mass of the active collision specimen (401) is flush with the clamping rods. S3. Adjusting the spatial position of the multi-purpose release device (3): The multi-purpose release device (3) is moved in space by the control panel (202), specifically, the vertical movement of the three-dimensional lifting rod (203), the horizontal movement of the X-axis moving platform (301) and the Y-axis moving platform (302), the test personnel leave the high-strength aluminum alloy frame (101), and close the device door (104) to prevent the active collision test piece (401) from accidentally popping out; S4. Arrange a non-contact visual measurement device (5): arrange two high-speed cameras (502) outside the high-strength aluminum alloy frame (101), the optical axis angle of the high-speed camera (502) is between 20° and 50°, and the optical axis is in the same plane as the passive collision specimen (402); S5. Data collection during collision: A remote control signal device is used to control the contraction of the electric control clamp rod, so that the active collision specimen (401) is freely released without initial velocity and vertically impacts the passive collision specimen (402). The collision force change data is captured by the force sensor (403), and the high-speed camera (502) obtains the full-field deformation data.

2. The method for using the high flexibility contact collision test device according to claim 1, characterized in that: As described in S1, the types of passive collision specimens (402) include flat plates, cylindrical specimens, smooth curved surfaces, and complex curved surfaces.

3. The method for using the high flexibility contact collision test device according to claim 1, characterized in that: As described in S2, the types of active collision test pieces (401) include spherical test pieces and cylindrical test pieces.

4. A high-flexibility contact collision test device according to claim 1, comprising a structural outer frame (1), an electric-controlled lifting device (2), a multi-purpose release device (3), a collision component (4) and a non-contact visual measurement device (5), wherein the structural outer frame (1) comprises a high-strength aluminum alloy frame (101), a transparent acrylic plate (102) and a steel plate fixing base (103), the high-strength aluminum alloy frame (101) is covered with a transparent acrylic plate (102) on all sides, a steel plate fixing base (103) is provided at the bottom of the high-strength aluminum alloy frame (101), the steel plate fixing base (103) is fixed to the ground by expansion screws, and the steel plate fixing base (103) is connected to the high-strength aluminum alloy frame (101) by rivets.

5. A high flexibility contact collision test device according to claim 4, characterized in that: The electric-controlled lifting device (2) comprises a main electric box (201) and a three-dimensional lifting rod (203); the main electric box (201) is installed on one side of the interior of a high-strength aluminum alloy frame (101); a control panel (202) is provided on the outside of the main electric box (201); the three-dimensional lifting rod (203) is located inside the high-strength aluminum alloy frame (101); the bottom of the three-dimensional lifting rod (203) is connected to a steel plate fixed base (103); and both sides of the three-dimensional lifting rod (203) are fixed to the high-strength aluminum alloy frame (101).

6. A high flexibility contact collision test device according to claim 5, characterized in that: The multi-purpose releasing device (3) comprises an X-axis moving platform (301), a Y-axis moving platform (302) and a specimen clamping device (303); the X-axis moving platform (301) and the Y-axis moving platform (302) are connected via a nut; the X-axis moving platform (301) and the Y-axis moving platform (302) are connected to a three-dimensional lifting rod (203) via a sliding member.

7. A high flexibility contact collision test device according to claim 6, characterized in that: The collision assembly (4) comprises an active collision specimen (401), a passive collision specimen (402), a force sensor (403) and a variable angle support (404); the active collision specimen (401) is clamped on a specimen clamping device (303); the variable angle support (404) is mounted on a steel plate fixed base (103); the upper portion of the variable angle support (404) is threadedly connected to the force sensor (403); the upper portion of the force sensor (403) is threadedly connected to the passive collision specimen (402); and the passive collision specimen (402) is located directly below the active collision specimen (401).

8. A high flexibility contact collision test device according to claim 7, characterized in that: The non-contact visual measurement device (5) comprises a high-speed camera (502) and a synchronous trigger device. Two high-speed cameras (502) are provided and placed on the ground via a tripod (501). The optical axis angle of the two high-speed cameras (502) should be between 20° and 50° and should be in the same plane as the passive collision specimen (402). The high-speed camera (502) is connected to the synchronous trigger device by signal.

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