A lumbar spine coupling loading test device and method based on intelligent driving

Abstract

This invention provides a lumbar spine coupling loading test device and method based on intelligent driving, relating to the field of intelligent driving technology. The device includes a clamping part and a loading part. The clamping part includes a lumbar spine segment sample, a first clamping cylinder, and a second clamping cylinder. The loading part includes a first clamping plate, a second clamping plate, a first slide rail, a support seat, and a lifting component. A drive rod is provided on the support seat, and the end of the drive rod away from the support seat is connected to the first clamping plate. A first force sensor is provided on the first clamping plate, and a second force sensor is provided on the second clamping plate. This invention has a simple structure and directly tests the fixed clamping at both ends of the lumbar spine segment, achieving a clear definition of the lumbar spine segment boundary. During testing, it can achieve coupled loading of multiple compressive load levels and multiple strain rate bending moment load levels in multiple directions, effectively covering the complex scenarios of real lumbar spine loading, obtaining more accurate data, and facilitating the establishment of an accurate predictive model of lumbar spine injury probability under large-angle seats.

Description

Technical Field

[0001] This invention relates to the field of intelligent driving technology, and in particular, to a lumbar spine coupling loading test device and method based on intelligent driving. Background Technology

[0002] With the development of intelligent driving technology, the seating postures of vehicle occupants have become more diverse. Large-angle seats, exemplified by "zero-gravity seats," significantly improve seating comfort by increasing the angle of the seat back and cushion, and adding leg support.

[0003] However, existing restraint systems are not ideal in protecting occupants in a reclining posture under a reclining seat during a collision. Studies have shown that compared to the traditional standard upright sitting posture, occupants in a reclining posture are more prone to severe lumbar spine injuries, which is an important indicator in the safety evaluation of reclining seats. During a collision, the lumbar spine of a reclining occupant undergoes both compression and bending simultaneously. Therefore, it is important to conduct lumbar spine force coupling tests on occupants in reclining seats under intelligent driving technology. For example, Chinese invention patent CN118857769A discloses a method for evaluating occupant protection in a frontal collision of a car with a reclining seat, including: S1, selecting a reclining seat as the evaluation object; S2, based on the evaluation object... S3. Select testing tools, including a sliding table environment sample and a novel physical dummy for testing the large-angle seat; S4. Match and adjust the evaluation method, including methods for selecting working conditions, selecting acceleration waveforms, and adjusting the seat and dummy; conduct sliding table tests based on the evaluation method and record the test results, and analyze typical injury patterns under the large-angle seat based on the test results; S5. Make a safety judgment based on the test data and obtain an overall safety evaluation score for the occupant under the large-angle seat. The overall safety evaluation includes an overall evaluation of lumbar compression force, lumbar bending moment, and comprehensive lumbar injury indicators.

[0004] However, the above evaluation methods still have the following drawbacks: they only use dummy adjustments for testing, which cannot directly obtain the stress situation of the lumbar spine segments and cannot achieve multi-force and multi-directional coupled loading tests; and the above lumbar spine injury tests only focus on the mechanical properties of the lumbar spine under a single load boundary. Under complex boundaries, especially under compression and bending coupled loads, the lumbar spine injury mechanism cannot be clearly defined and studied, and an accurate predictive model of human lumbar spine injury probability under large tilt seats cannot be established.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a lumbar spine coupling loading test device and method based on intelligent driving. Summary of the Invention

[0006] The purpose of this invention is to provide a lumbar spine coupling loading test device based on intelligent driving. It has a simple structure and directly tests the two ends of the lumbar spine segment by fixing them together, thus achieving a clear definition of the lumbar spine segment boundary. During the test, it can achieve coupling loading of multiple compression load levels and multiple strain rate bending moment load levels in multiple directions, effectively covering the complex scenarios of real lumbar spine loading, obtaining more accurate data, and facilitating the establishment of an accurate predictive model of lumbar spine injury probability under large tilt seats.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A lumbar spine coupling loading test device based on intelligent driving includes a clamping part and a loading part. The clamping part includes a first clamping cylinder for connecting to the end of a lumbar vertebral segment sample and a second clamping cylinder for connecting to the end of the lumbar vertebral segment sample away from the first clamping cylinder. The loading part includes a first clamping plate connected to the first clamping cylinder, a second clamping plate connected to the second clamping cylinder, a first slide rail connected to the side of the first clamping plate away from the second clamping plate, a support seat disposed on the side of the second clamping plate away from the first clamping plate, and a lifting component for driving the support seat to rise and fall. A drive rod is disposed on the support seat, and the end of the drive rod away from the support seat is connected to the first clamping plate. A first force sensor is disposed on the first clamping plate, and a second force sensor is disposed on the second clamping plate.

[0009] The lumbar vertebral segment sample is clamped through the first and second clamping cylinders; the second clamping plate is moved towards the first clamping plate by the lifting component to apply static pressure to the lumbar vertebral segment sample; the first clamping plate is rotated around the second clamping plate by the drive rod to apply dynamic bending load to the lumbar vertebral segment sample; the test pressure of the lumbar vertebral segment sample during static pressure loading and dynamic bending loading is obtained by the first and second force sensors.

[0010] As a preferred embodiment of the present invention, the lifting component includes a support rod connected to the support base and an adjusting nut sleeved on the support rod, and a spring is provided between the adjusting nut and the support base.

[0011] As a preferred embodiment of the present invention, the support base includes a first support base for connecting with the support rod and a second support base for connecting with the second clamping plate. The first support base and the second support base are hinged together, and a hinge locking bolt is provided at the hinged connection between the first support base and the second support base.

[0012] As a preferred embodiment of the present invention, the first support base is provided with an insertion groove on the side near the support rod for facilitating the insertion of the support rod; the second support base is provided with a second slide rail for facilitating the sliding of the second clamping plate.

[0013] As a preferred embodiment of the present invention, the drive rod is connected to the second support base, and the second support base is provided with a drive motor for driving the drive rod to rotate.

[0014] As a preferred embodiment of the present invention, the first clamping plate is connected to the first slide rail via a sliding protrusion, and the first slide rail is an arc-shaped slide rail.

[0015] As a preferred embodiment of the present invention, the drive rod includes a first drive rod for connecting to the first clamp and a second drive rod for connecting to the second support base. The first drive rod has an embedding groove at one end near the second drive rod, and at least a portion of the second drive rod is located within the embedding groove.

[0016] As a preferred embodiment of the present invention, the second slide rail is a planar slide rail, and the second slide rail is provided with a track groove for facilitating the sliding of the second clamping plate.

[0017] As a preferred embodiment of the present invention, the first clamping cylinder includes a functional cylinder, a base plate disposed at the end of the functional cylinder, and a pad disposed on the base plate. The pad is provided with a first screw for connecting with the lumbar vertebral segment sample, and the side of the functional cylinder is provided with a second screw for connecting with the lumbar vertebral segment sample.

[0018] This invention also provides a testing method for a lumbar spine coupling loading testing device based on intelligent driving, comprising the following steps:

[0019] S1: Clamping; Connect one end of the lumbar segment sample to the first clamping cylinder, and connect the other end of the lumbar segment sample to the second clamping cylinder to complete the clamping of the lumbar segment sample.

[0020] S2: Test pre-installation; connect the first clamping cylinder to the first clamping plate, and connect the second clamping cylinder to the second clamping plate, so that the first clamping plate contacts the first slide rail, and complete the pre-installation of the lumbar segment sample loading test;

[0021] S3: Static pressure loading; The second clamping plate is pushed to move towards the first clamping plate by the lifting component, so that the lumbar segment sample receives a compressive load that reaches a preset value and is held for a preset time to perform static pressure loading on the lumbar segment sample;

[0022] S4: Dynamic bending loading; The first clamping plate is driven to rotate around the second clamping plate at a preset angular velocity value by the drive rod to perform dynamic bending loading on the lumbar segment sample.

[0023] S5: Acquire test data; acquire test data of lumbar vertebral segment samples under static pressure loading and dynamic bending loading through the first force sensor and the second force sensor.

[0024] The beneficial effects of the lumbar spine coupling loading test device and method based on intelligent driving of the present invention are as follows: the structure is simple, and the test is performed directly on the two ends of the lumbar spine segment, which realizes the clear definition of the lumbar spine segment boundary. During the test, multiple compression load levels and multiple strain rate bending moment load levels in multiple directions can be coupled, effectively covering the complex scenario of real lumbar spine loading, obtaining more accurate data, which is conducive to establishing an accurate prediction model of lumbar spine injury probability under large tilt seat. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a lumbar spine coupling loading test device based on intelligent driving according to the present invention;

[0026] Figure 2 This is a schematic diagram of the clamping part in one embodiment of the lumbar spine coupling loading test device based on intelligent driving according to the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the first clamping cylinder in one embodiment of the lumbar spine coupling loading test device based on intelligent driving of the present invention;

[0028] Figure 4 This is a schematic diagram of the drive rod structure in one embodiment of the lumbar spine coupling loading test device based on intelligent driving according to the present invention;

[0029] In the figure: 1. Clamping part, 11. First clamping cylinder, 111. Functional cylinder, 112. Base plate, 113. Pad plate, 114. First screw, 115. Second screw, 12. Second clamping cylinder, 13. Lumbar segment sample, 2. Loading part, 21. First clamping plate, 211. Sliding protrusion, 22. Second clamping plate, 23. First slide rail, 24. Support seat, 241. First support seat, 242. Second support seat, 243. Hinge locking bolt, 244. Second slide rail, 245. Insertion slot, 25. Drive rod, 251. First drive rod, 252. Second drive rod, 261. Support rod, 262. Adjusting nut, 263. Spring, 264. Base. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement and steps of the modules and steps set forth in these embodiments do not limit the scope of the invention.

[0032] At the same time, it should be understood that, for ease of description, the process shown in the attached diagram is not performed in isolation, but rather involves multiple steps that overlap.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0035] Techniques, methods, and systems known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0036] Example 1: As Figures 1 to 2 The image shown is merely one embodiment of the present invention. A lumbar spine coupling loading test device based on intelligent driving includes a clamping part 1 and a loading part 2. The clamping part 1 includes a first clamping cylinder 11 for connecting to the end of a lumbar spine segment sample 13 and a second clamping cylinder 12 connected to the end of the lumbar spine segment sample 13 away from the first clamping cylinder 11. The loading part 2 includes a first clamping plate 21 connected to the first clamping cylinder 11, a second clamping plate 22 connected to the second clamping cylinder 12, a first slide rail 23 connected to the side of the first clamping plate 21 away from the second clamping plate 22, a support seat 24 disposed on the side of the second clamping plate 22 away from the first clamping plate 21, and a lifting member 26 for driving the support seat 24 to rise and fall. A drive rod 25 is disposed on the support seat 24, and the end of the drive rod 25 away from the support seat 24 is connected to the first clamping plate 21. A first force sensor is disposed on the first clamping plate 21, and a second force sensor is disposed on the second clamping plate 22.

[0037] The lumbar segment sample is clamped by the first clamping cylinder 11 and the second clamping cylinder 12; the second clamping plate 22 is pushed to move towards the first clamping plate 21 by the lifting component to apply static pressure to the lumbar segment sample; the first clamping plate 21 is driven to rotate around the second clamping plate 22 by the drive rod 25 to apply dynamic bending load to the lumbar segment sample; the test pressure of the lumbar segment sample during static pressure loading and dynamic bending loading is obtained by the first force sensor and the second force sensor.

[0038] In this invention, the two ends of the lumbar vertebral segment sample 13 are first installed and fixed to the first clamping cylinder 11 and the second clamping cylinder 12 respectively to complete the clamping of the lumbar vertebral segment sample 13 and form the clamping part 1; then the clamping part 1 is installed on the loading part 2 to perform static pressure loading and dynamic bending loading on the lumbar vertebral segment sample 13.

[0039] First, the structure of the clamping part 1 includes a first clamping cylinder 11 for connecting to the end of the lumbar vertebral segment sample 13 and a second clamping cylinder 12 connected to the end of the lumbar vertebral segment sample 13 away from the first clamping cylinder 11. In fact, the L1 vertebral body end of the lumbar vertebral segment sample 13 is connected and fixed to the first clamping cylinder 11, and the L5 vertebral body end of the lumbar vertebral segment sample 13 is connected and fixed to the first clamping cylinder 11 to complete the clamping of the lumbar vertebral segment sample 13.

[0040] Then, the clamping part 1 is installed onto the loading part 2, and the end of the first clamping cylinder 11 away from the lumbar segment sample 13 is connected to the first clamping plate 21, and the end of the second clamping cylinder 12 away from the lumbar segment sample 13 is connected to the second clamping plate 22, thus completing the installation of the clamping part 1.

[0041] It should be noted that after the clamping part 1 is installed, the side of the first clamping plate 21 away from the first clamping cylinder 11 should abut against the surface of the first slide rail 23.

[0042] Next, static pressure is applied to the clamping part 1 (lumbar segment sample 13); a support seat 24 is provided on the side of the second clamping plate 22 away from the first clamping plate 21, and the support seat 24 is connected to a lifting component; the lifting component pushes the first clamping plate 21 to the second clamping plate 22. Since the first clamping plate 21 is pressed against the surface of the fixedly installed first slide rail 23 and cannot move, the lumbar segment sample can be effectively squeezed and static pressure is applied to the lumbar segment sample.

[0043] Next, dynamic bending loading is applied to the clamping part 1 (lumbar segment sample 13). A drive rod 25 is provided on the support base 24. The end of the drive rod 25 away from the support base 24 is connected to the first clamping plate 21. When the drive rod 25 rotates, the first clamping plate 21 rotates around the second clamping plate 22. In fact, the first clamping plate 21 rotates around the connection between the drive rod 25 and the support base 24. This can effectively drive the clamping part 1 (lumbar segment sample 13) to rotate. During this rotation process, dynamic bending loading is applied to the lumbar segment sample.

[0044] Finally, there is the test data. A first force sensor is installed on the first clamping plate 21, and a second force sensor is installed on the second clamping plate 22. The test pressure data of the lumbar segment sample under static pressure loading and dynamic bending loading are obtained through the first force sensor and the second force sensor.

[0045] This invention discloses a lumbar spine coupling loading test device based on intelligent driving. It has a simple structure and directly tests the two ends of the lumbar spine segment by fixing them together, thus clearly defining the boundaries of the lumbar spine segment. During the test, it can achieve coupling loading of multiple compression load levels and multiple strain rate bending moment load levels in multiple directions, effectively covering the complex scenarios of real lumbar spine loading, obtaining more accurate data, and helping to establish an accurate predictive model of lumbar spine injury probability under large tilt seats.

[0046] Example 2, as Figures 1 to 4 As shown, this is only one embodiment of the present invention. Based on the first embodiment, in the lumbar spine coupling loading test device based on intelligent driving of the present invention, the lifting component includes a support rod 261 connected to the support seat 24 and an adjusting nut 262 sleeved on the support rod 261. A spring 263 is provided between the adjusting nut 262 and the support seat 24.

[0047] The support rod 261 is provided with external threads, and the adjusting nut 262 is threadedly connected to the support rod 261. When the adjusting nut 262 approaches the support seat 24, it will be squeezed by the spring 263 to move the support seat 24 and the second clamping plate 22 on it towards the first clamping plate 21, thereby effectively squeezing the lumbar segment sample and applying static pressure to the lumbar segment sample.

[0048] Of course, adjusting the nut 262 closer to or further away from the support 24 can be done manually or by machine.

[0049] Finally, a base 264 is provided at the end of the support rod 261 away from the support base 24. The base 264 is fixedly installed to provide fixed support for the side of the second clamping plate 22 away from the first clamping plate 21.

[0050] Example 3, still as Figures 1 to 4The above is only one embodiment of the present invention. Based on any of the above embodiments, in the lumbar spine coupling loading test device based on intelligent driving of the present invention, the support seat 24 includes a first support seat 241 for connecting with the support rod 261 and a second support seat 242 for connecting with the second clamping plate 22. The first support seat 241 and the second support seat 242 are hinged together, and a hinge locking bolt 243 is provided at the hinge connection between the first support seat 241 and the second support seat 242.

[0051] In other words, the angle between the first support 241 and the second support 242 can be adjusted so that the lumbar segment sample 13 presents different angles when pre-installed, thereby conducting static pressure loading and dynamic bending loading tests at different angles.

[0052] In this invention, the first support base 241 is provided with an insertion slot 245 on the side near the support rod 261 to facilitate the insertion of the support rod 261, so that the first support base 241 can be displaced and adjusted along the extension direction of the support rod 261, thereby realizing the movement of the second clamping plate 22 toward the first clamping plate 21.

[0053] Furthermore, the second support base 242 is provided with a second slide rail 244 for facilitating the sliding of the second clamping plate 22. Here, the second slide rail 244 is a planar slide rail, and the second slide rail 244 is provided with a track groove for facilitating the sliding of the second clamping plate 22. In this way, the second clamping plate 22 can slide along the track groove of the second slide rail 244, which can eliminate the additional forward and backward shear forces during dynamic bending load testing, so as to achieve pure bending moment loading.

[0054] Finally, the drive rod 25 is connected to the second support base 242, and the second support base 242 is provided with a drive motor for driving the drive rod 25 to rotate (last of claim 3), and the drive motor is a continuously variable speed motor.

[0055] Example 4, still as Figures 1 to 4 As shown, this is only one embodiment of the present invention. Based on any of the above embodiments, in the lumbar spine coupling loading test device based on intelligent driving of the present invention, the first clamping plate 21 is connected to the first slide rail 23 through the sliding protrusion 211. The first slide rail 23 is an arc-shaped slide rail. The center of the arc structure of the first slide rail 23 is approximately near the second support seat 242, so that when the drive motor works and drives the drive rod 25 to rotate, the sliding protrusion 211 of the first clamping plate 21 at the other end of the drive rod 25 just slides on the surface of the first slide rail 23.

[0056] It should be noted that the drive rod 25 includes a first drive rod 251 for connecting to the first clamp 21 and a second drive rod 252 for connecting to the second support 242. The first drive rod 251 has an embedding groove at one end near the second drive rod 252, and at least a portion of the second drive rod 252 is located in the embedding groove.

[0057] When the lifting component does not push the second clamping plate 22, after the clamping part 1 is installed, the side of the first clamping plate 21 away from the first clamping cylinder 11 needs to abut against the surface of the first slide rail 23. At this time, part of the second drive rod 252 has already been inserted into the embedding groove of the first drive rod 251, so that the second clamping plate 22 and the first clamping plate 21 can be effectively connected through the drive rod 25, and will not fall apart.

[0058] Furthermore, when the lifting component pushes the second clamping plate 22 to move towards the first clamping plate 21, the second drive rod 252 will insert deeper into the embedding groove of the first drive rod 251, thereby effectively squeezing the lumbar segment sample and applying static pressure to the lumbar segment sample.

[0059] Example 5, still as Figures 1 to 4 As shown, this is only one embodiment of the present invention. Based on any of the above embodiments, in the lumbar spine coupling loading test device based on intelligent driving of the present invention, the first clamping plate 21 is provided with a first rotating groove for facilitating the rotation of the first clamping cylinder 11; the second clamping plate 22 is provided with a second rotating groove for facilitating the rotation of the second clamping cylinder 12.

[0060] After the first clamping cylinder 11 is installed on the first clamping plate 21, the first clamping cylinder 11 can be rotated. Similarly, after the second clamping cylinder 12 is installed on the second clamping plate 22, the second clamping cylinder 12 can be rotated. This can change the installation direction of the lumbar segment sample, and can realize multi-directional bending loading such as flexion, extension and lateral flexion.

[0061] Example 6, still as Figures 1 to 4 The above is only one embodiment of the present invention. Based on any of the above embodiments, in the lumbar spine coupling loading test device based on intelligent driving of the present invention, the first clamping cylinder 11 includes a functional cylinder 111, a base plate 112 disposed at the end of the functional cylinder 111, and a pad 113 disposed on the base plate 112. The pad 113 is located in the middle of the base plate 112 inside the functional cylinder 111. A first screw 114 for connecting with the lumbar spine segment sample is disposed on the pad 113, and a second screw 115 for connecting with the lumbar spine segment sample is disposed on the side of the functional cylinder 111.

[0062] The second clamping cylinder 12 has the same structure as the first clamping cylinder 11.

[0063] When clamping the lumbar segment sample 13, the L1 vertebral body end of the lumbar segment sample 13 is inserted into the functional cylinder 111 until the L1 vertebral body end abuts against the pad 113. Then, the first screw 114 is inserted into the L1 vertebral body of the lumbar segment sample 13 through the base plate 112 and the pad 113 in sequence. Then, the second screw 115 is inserted into the L1 vertebral body of the lumbar segment sample 13 from the side of the functional cylinder 111, thus completing the fixed connection between the L1 vertebral body of the lumbar segment sample 13 and the first clamping cylinder 11. In the same way, the L5 vertebral body of the lumbar segment sample 13 is fixedly connected to the second clamping cylinder 12.

[0064] It should be noted that the first screw 114 and the second screw 115 are both wooden screws, which can enhance the connection between the lumbar vertebral segment sample 13 and the first clamping sleeve 11 (or the second clamping sleeve 12), and the wooden screws cause less damage to the structural stiffness of the vertebral body.

[0065] In fact, the first screw 114 is an M3 wooden bolt, and there are four of them, which makes the connection between the lumbar segment sample 13 and the pad 113 more stable; and the second screw 115 is an M6 wooden bolt, and there are three of them, which are connected to both sides of the lumbar segment sample 13 and the protruding side of the lumbar segment sample 13 respectively. That is, the side of the lumbar segment sample 13 away from the protruding vertebra is not fixed by the second screw 115. The lumbar segment sample 13 can be fixed with maximum stability with the fewest second screws 115 and the least amount of structural damage.

[0066] Furthermore, after the first screw 114 and the second screw 115 are driven in to fix the end of the lumbar vertebral segment sample 13, epoxy resin needs to be injected into the functional cylinder 111. During the injection process, the resin should be prevented from constraining the facet joints and intervertebral discs to ensure the freedom of the lumbar vertebral segment. After the resin solidifies, a stable connection of the lumbar vertebral segment sample 13 is achieved.

[0067] Before clamping and before testing, the lumbar segment sample 13 needs to be stored at intervals. It is necessary to continuously spray the sample with 0.9% saline solution at intervals, wrap the lumbar segment sample 13 with double-layer polyethylene film to maintain the moisture of the lumbar segment sample 13, and finally seal it in a labeled self-sealing bag for storage at a temperature of 0~8 degrees Celsius.

[0068] During the static pressure loading test, the lifting component pushes the second clamping plate towards the first clamping plate, so that the lumbar segment sample receives a compressive load that reaches a preset value and is held for a preset time to apply static pressure loading to the lumbar segment sample. In fact, the lifting component pushes the second clamping plate towards the first clamping plate until the first force sensor on the first clamping plate senses that the compressive load has reached the preset value, then the loading stops and the load is held for a preset time. Generally, the preset value can be selected as 2kN, 3kN or 4kN, and the preset time can be selected as 10 minutes, 20 minutes or 30 minutes to simulate the force on the lumbar spine when an occupant rides in a vehicle.

[0069] During the dynamic bending load test, the output power and output time of the drive motor are controlled so that the drive rod 25 rotates the first clamping plate 21 at a high strain rate along the first slide rail. That is, the first clamping plate 21 rotates around the second support seat 242 at a preset angular velocity value and a preset angle value to achieve dynamic bending load on the lumbar segment sample until the lumbar segment sample fails. Generally, the preset angular velocity value is between 100° / s and 1000° / s, and the preset angle value is between 0 and 45°. In fact, the drive rod 25 only rotates for a few tenths of a second to a few tenths of a second to achieve high-speed short-time bending load on the lumbar segment sample 13 to simulate the force on the lumbar spine during an occupant impact.

[0070] Finally, when acquiring test data, in addition to obtaining test pressure data of the lumbar segment sample under static pressure loading and dynamic bending loading through the first force sensor and the second force sensor, high frame rate video of the lumbar segment sample is also captured by a high-speed camera during the test to obtain video information of the lumbar segment sample during the coupled loading test. In addition, CT scans of the lumbar segment sample 13 before and after the test are also performed to obtain medical imaging information of vertebral fracture.

[0071] In this way, by using test pressure data, test video information, and medical imaging information, the final data on the lumbar spine load can be obtained. The data acquisition is more accurate and is conducive to establishing an accurate predictive model of lumbar spine injury probability under a large-angle seat.

[0072] Example 7 is merely one embodiment of the present invention. Based on any of the above embodiments, the present invention also provides a testing method for a lumbar spine coupling loading testing device based on intelligent driving, comprising the following steps:

[0073] S1: Clamping; Connect one end of the lumbar segment sample to the first clamping cylinder, and connect the other end of the lumbar segment sample to the second clamping cylinder to complete the clamping of the lumbar segment sample.

[0074] S2: Test pre-installation; connect the first clamping cylinder to the first clamping plate, and connect the second clamping cylinder to the second clamping plate, so that the first clamping plate contacts the first slide rail, and complete the pre-installation of the lumbar segment sample loading test;

[0075] S3: Static pressure loading; The second clamping plate is pushed to move towards the first clamping plate by the lifting component, so that the lumbar segment sample receives a compressive load that reaches a preset value and is held for a preset time to perform static pressure loading on the lumbar segment sample;

[0076] S4: Dynamic bending loading; The first clamping plate is driven to rotate around the second clamping plate at a preset angular velocity value by the drive rod to perform dynamic bending loading on the lumbar segment sample.

[0077] S5: Acquire test data; acquire test data of lumbar vertebral segment samples under static pressure loading and dynamic bending loading through the first force sensor and the second force sensor.

[0078] This invention discloses a lumbar spine coupling loading test device and method based on intelligent driving. It has a simple structure and directly tests the two ends of the lumbar spine segment by fixing them together, thus clearly defining the boundaries of the lumbar spine segment. During the test, it can achieve coupling loading of multiple compression load levels and multiple strain rate bending moment load levels in multiple directions, effectively covering the complex scenarios of real lumbar spine loading, obtaining more accurate data, and helping to establish an accurate predictive model of lumbar spine injury probability under large tilt seats.

[0079] This invention is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this invention should be included within the scope of protection of this invention.

Claims

1. A lumbar spine coupling loading test device based on intelligent driving, characterized in that: The device includes a clamping part (1) and a loading part (2). The clamping part (1) includes a first clamping cylinder (11) for connecting to the end of a lumbar segment sample (13) and a second clamping cylinder (12) for connecting to the end of the lumbar segment sample (13) away from the first clamping cylinder (11). The loading part (2) includes a first clamping plate (21) connected to the first clamping cylinder (11), a second clamping plate (22) connected to the second clamping cylinder (12), a first slide rail (23) connected to the side of the first clamping plate (21) away from the second clamping plate (22), and a loading rail (23) disposed on the side of the second clamping plate (22) away from the first clamping cylinder (11). A support base (24) on one side of a clamp (21) and a lifting component for driving the support base (24) to rise and fall; a drive rod (25) is provided on the support base (24), and one end of the drive rod (25) away from the support base (24) is connected to the first clamp (21); a first force sensor is provided on the first clamp (21), and a second force sensor is provided on the second clamp (22); the lifting component includes a support rod (261) connected to the support base (24) and an adjusting nut (262) sleeved on the support rod (261), the adjusting nut (262) and the support base (21) A spring (263) is provided between 24); the support base (24) includes a first support base (241) for connecting with the support rod (261) and a second support base (242) for connecting with the second clamp (22). The first support base (241) and the second support base (242) are hinged together, and a hinge locking bolt (243) is provided at the hinge connection between the first support base (241) and the second support base (242). The drive rod is connected to the second support base, and a drive motor for driving the drive rod to rotate is provided on the second support base; the first clamp (21) is slidably connected to the second support base. The protrusion (211) is connected to the first slide rail (23), which is an arc-shaped slide rail; the drive rod (25) includes a first drive rod (251) for connecting to the first clamp (21) and a second drive rod (252) for connecting to the second support (242). The first drive rod (251) has an embedded groove at one end near the second drive rod (252), and at least a part of the second drive rod (252) is located in the embedded groove. When the lifting member pushes the second clamp to move towards the first clamp, the second drive rod will insert deeper into the embedded groove of the first drive rod. The lumbar segment sample is clamped by the first clamping cylinder (11) and the second clamping cylinder (12); the second clamping plate (22) is pushed to move towards the first clamping plate (21) by the lifting component to apply static pressure to the lumbar segment sample; the first clamping plate (21) is driven to rotate around the second clamping plate (22) by the drive rod (25) to apply dynamic bending load to the lumbar segment sample; the test pressure of the lumbar segment sample during static pressure loading and dynamic bending loading is obtained by the first force sensor and the second force sensor.

2. The lumbar spine coupling loading test device based on intelligent driving according to claim 1, characterized in that: The first support base (241) is provided with an insertion slot (245) on the side near the support rod (261) to facilitate the insertion of the support rod (261); the second support base (242) is provided with a second slide rail (244) to facilitate the sliding of the second clamp (22).

3. The lumbar spine coupling loading test device based on intelligent driving according to claim 1, characterized in that: The drive rod (25) is connected to the second support base (242), and the second support base (242) is provided with a drive motor for driving the drive rod (25) to rotate.

4. The lumbar spine coupling loading test device based on intelligent driving according to claim 2, characterized in that: The second slide rail (244) is a flat slide rail, and the second slide rail (244) is provided with a track groove for facilitating the sliding of the second clamp (22).

5. The lumbar spine coupling loading test device based on intelligent driving according to claim 1, characterized in that: The first clamping cylinder (11) includes a functional cylinder (111), a base plate (112) disposed at the end of the functional cylinder (111), and a pad plate (113) disposed on the base plate (112). The pad plate (113) is provided with a first screw (114) for connecting with the lumbar vertebral segment sample, and the side of the functional cylinder (111) is provided with a second screw (115) for connecting with the lumbar vertebral segment sample.

6. A test method for a lumbar coupling loading test device based on intelligent driving according to any one of claims 1 to 5, characterized in that, Includes the following steps: S1: Clamping; Connect one end of the lumbar segment sample to the first clamping cylinder, and connect the other end of the lumbar segment sample to the second clamping cylinder to complete the clamping of the lumbar segment sample. S2: Test pre-installation; connect the first clamping cylinder to the first clamping plate, and connect the second clamping cylinder to the second clamping plate, so that the first clamping plate contacts the first slide rail, and complete the pre-installation of the lumbar segment sample loading test; S3: Static pressure loading; The second clamping plate is pushed to move towards the first clamping plate by the lifting component, so that the lumbar segment sample receives a compressive load that reaches a preset value and is held for a preset time to perform static pressure loading on the lumbar segment sample; S4: Dynamic bending loading; The first clamping plate is driven to rotate around the second clamping plate at a preset angle with a preset angular velocity by the drive rod to perform dynamic bending loading on the lumbar segment sample; S5: Acquire test data; acquire test data of lumbar vertebral segment samples under static pressure loading and dynamic bending loading through the first force sensor and the second force sensor.

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