Manikin foot impact test system and method

Abstract

The application discloses a dummy foot impact test system and method, which comprises a foot calibration module, a support frame structure and a control system, wherein the foot calibration module comprises a workbench assembly, a fixed structure, a sliding structure and an adjusting platform, an adjusting assembly and a foot impact hammer assembly; the workbench assembly comprises a dummy foot test assembly; the adjusting assembly comprises an up-down sliding platform adjusting assembly, a screw rod module assembly and an inner adjusting component; the foot impact hammer assembly comprises an impact hammer, a foot swing arm, a foot driving arm and a driving structure; an inclination sensor is arranged on the foot driving arm to collect the rotation angle of the foot driving arm; an acceleration sensor is arranged on the impact hammer to collect the impact acceleration of the impact hammer; a force sensor is arranged on the dummy foot test assembly to collect the impact force; the inclination sensor, the acceleration sensor and the force sensor collect corresponding data and transmit the data to the control system for storage.

Description

Technical Field

[0001] This invention relates to the field of dummy testing and calibration technology, specifically to a dummy foot impact testing system and method. Background Technology

[0002] In the field of automotive safety performance testing, both domestically and internationally, human-shaped crash test dummies are used as testing tools to ensure human safety. Various sensors embedded in different parts of the dummy obtain corresponding response parameters. These data reflect the degree of injury to the human body during a car crash, thereby determining the vehicle's safety performance and providing researchers with a reference for improving vehicle body structure and optimizing restraint systems. To obtain accurate and reliable data from car crash tests, the dummy must possess good biomimicry. To verify the biomimicry of the dummy, calibration and testing tests are often required.

[0003] Therefore, there is a need to provide a dummy foot impact testing system and method for calibration and testing of dummy feet. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a dummy foot impact testing system and, more importantly, a corresponding dummy foot impact testing method.

[0005] First, this invention provides a dummy foot impact testing system, comprising: a foot calibration module, a support frame structure, and a control system, wherein the foot calibration module includes: The worktable assembly includes a dummy foot testing assembly, a fixing structure for fixing the dummy foot testing assembly, a sliding structure for driving the fixing structure to slide left and right, and an adjustment table for providing adjustable foot support for the dummy foot testing assembly. The adjustment assembly includes an upper and lower sliding table adjustment assembly for vertical adjustment of the worktable assembly, a lead screw module assembly for driving the upper and lower sliding table adjustment assembly to slide vertically on the support frame structure, and an internal adjustment component for vertical adjustment of the adjustment table; and The foot impact hammer assembly includes an impact hammer, a foot swing arm, a foot drive arm, and a drive structure. The drive structure drives the foot drive arm, and the drive arm drives the foot swing arm to move together, so that the impact hammer mounted on the lower end of the foot swing arm accurately impacts the foot of the human foot test assembly at a preset angle and impact speed. The foot drive arm is equipped with an inclination sensor for collecting its rotation angle, the impact hammer is equipped with an acceleration sensor for collecting its impact acceleration, and the dummy foot test assembly is equipped with a force sensor for collecting the impact force. The inclination sensor, acceleration sensor and force sensor collect the corresponding data and transmit them to the control system for storage.

[0006] The fixing structure includes a detachable foot fixing seat, and the sliding structure includes left and right sliding blocks, a first guide rail symmetrically arranged on the worktable panel to guide the left and right sliding blocks, a positioning rack arranged on the worktable panel, and a buckle installed on the left and right sliding blocks and cooperating with the positioning rack to lock the left and right sliding blocks.

[0007] It also includes an auxiliary locking structure, which comprises an auxiliary locking block and a handle. The auxiliary locking block is fixed to the left and right sliding blocks with screws, and the handle and auxiliary locking block are threaded together. When the left and right sliding blocks slide to the appropriate position, rotating the handle causes the handle rod to press against the first guide rail and lock it in place. The internal adjustment component includes an adjustment module fixedly connected to the adjustment platform, and a stepper motor that drives the adjustment module to precisely adjust the adjustment platform up and down.

[0008] The upper and lower sliding table adjustment assembly includes a first sliding table fixing plate located below the worktable panel, a second sliding table fixing plate vertically fixed to the first sliding table fixing plate, and a sliding seat plate connected to the lead screw module assembly. The sliding seat plate drives the upper and lower sliding table adjustment assembly to slide up and down in the vertical direction under the action of the lead screw module assembly.

[0009] The lead screw module assembly includes a main frame fixed to the support frame structure, a lead screw module fixed to the main frame by a lead screw fixing seat, a lead screw sleeve fixing seat sleeved on the lead screw module, and a DC motor and a worm gear reducer mounted on the main frame; wherein, the DC motor transmits power to the lead screw module through the worm gear reducer, and drives the sliding seat plate connected to it through the lead screw sleeve fixing seat to drive the upper and lower sliding table adjustment assembly to slide up and down in the vertical direction.

[0010] It also includes an upper and lower guide structure, which includes a second guide rail symmetrically arranged on the main frame and four guide sliders that cooperate with the second guide rail to guide the sliding seat plate.

[0011] The foot impact hammer assembly includes a foot impact assembly fixing plate fixed to the support frame structure, a foot impact hammer fixing seat fixed to the foot impact assembly fixing plate, and a foot rotating shaft disposed between the foot impact hammer fixing seats and connected to the drive structure; the drive structure includes a planetary reducer fixed to the foot impact hammer fixing seat via a foot reducer fixing seat and a servo motor, the output end of the planetary reducer being connected to the foot rotating shaft; wherein, the foot drive arm is rotated by the foot rotating shaft via a built-in key.

[0012] The foot impact hammer assembly also includes an intermediate connecting structure; the intermediate connecting structure includes a magnetic fixing plate fixed below the foot drive arm, a foot electromagnet on the magnetic fixing plate, and a magnetic block on the impact hammer; when the foot drive arm rotates, the foot swing arm and the impact hammer are simultaneously driven to rotate under the magnetic attraction of the foot electromagnet to the magnetic block.

[0013] Secondly, the present invention also provides a method for testing the impact of a dummy foot, comprising the following steps: The dummy foot test assembly is fixed by the fixed structure and adjusted left and right by the sliding structure to meet the placement requirements of different dummy foot test assemblies that can be placed on the adjustment platform; The control system allows the upper and lower slide adjustment assembly and the lead screw module assembly to adjust the worktable assembly up and down, and the internal adjustment component to adjust the adjustment platform, so that the dummy foot test assembly meets the precise position requirements of the impact hammer impacting the foot. The control system controls the drive structure to rotate the foot drive arm at a set angle and rotation speed. The foot drive arm drives the foot swing arm to rotate together, so that the impact hammer impacts the foot of the dummy foot test assembly at a preset impact speed and impact angle. Among them, the tilt sensor, acceleration sensor and force sensor collect the corresponding data and transmit them to the control system for storage.

[0014] The technical solution of this invention has the following advantages: The dummy foot impact testing system provided by this invention can achieve automated operation, reduce human intervention and ensure the reliability of the experiment. The foot test of the foot calibration module adopts an electronic control adjustment design to avoid inaccurate test data caused by human manual operation errors. At the same time, the foot impact test of different series of dummies can be carried out by replacing the foot fixation seat. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the dummy foot impact testing system described in this invention; Figure 2 This is a schematic diagram of the worktable assembly - upper and lower sliding stage adjustment assembly described in this invention; Figure 3 This is a schematic diagram of the lead screw module assembly described in this invention; Figure 4 This is a schematic diagram of the foot impact hammer assembly described in this invention; Figure 5 for Figure 4 Enlarged view of part A in the diagram; Figure 6 This is a schematic diagram of the foot drive arm and foot swing arm described in this invention.

[0017] Reference numerals: 1-Support frame structure, 2-Foot calibration module, 2.1-Workbench assembly, 2.2-Upper and lower sliding table adjustment assembly, 2.3-Screw module assembly, 2.4-Foot impact hammer assembly, 2.1.1-Workbench panel, 2.1.2-First guide rail, 2.1.3-Left and right sliding blocks, 2.1.4-Locking block, 2.1.5-Foot fixing seat, 2.1.6-Snap fastener, 2.1.7-Positioning rack, 2.1.8-Adjustment platform, 2.1.9-Handle, 2.1.10-Dummy foot test assembly, 2.2.1-Slide table fixing plate one, 2.2.2-Slide table fixing plate two, 2.2.3-Sliding seat plate, 2.2.4-Stepper motor, 2.2.5-Adjustment module, 2.2.6-Adjustment module fixing seat, 2.3.1-DC motor 2.3.2 Worm Gear Reducer, 2.3.3 Reducer Mount, 2.3.4 Second Guide Rail, 2.3.5 Main Frame, 2.3.6 Lead Screw Module, 2.3.7 Lead Screw Mount, 2.3.8 Lead Screw Sleeve Mount, 2.4.1 Servo Motor 1, 2.4.2 Planetary Reducer 1, 2.4.3 Foot Reducer Mount, 2.4.4 Foot Impact Hammer Mount, 2.4.5 Foot Impact Assembly Mounting Plate, 2.4.6 Foot Shaft, 2.4.7 Foot Drive Arm, 2.4.8 Foot Swing Arm, 2.4.9 Impact Hammer, 2.4.10 Foot Electromagnet, 2.4.11 Magnetic Block, 2.4.12 Magnetic Mounting Plate, 2.4.13 Tilt Sensor, 2.4.14 Accelerometer. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following content is merely illustrative and explanatory of the concept of the present invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the inventive concept or exceed the scope defined by the claims, all of which should fall within the protection scope of the present invention. Unless otherwise specified, the experimental reagents and materials used in the following embodiments are commercially available. Example 1

[0019] like Figure 1 As shown, this embodiment provides a dummy foot impact testing system, including: a foot calibration module 2, a support frame structure 1, and a control system. The foot calibration module 2 includes: The workbench assembly 2.1 includes a dummy foot test assembly 2.1.10, a fixing structure for fixing the dummy foot test assembly 2.1.10, a sliding structure for driving the fixing structure to slide left and right, and an adjustment table 2.1.8 for providing adjustable foot support for the dummy foot test assembly 2.1.10; The adjustment assembly includes an upper and lower sliding table adjustment assembly 2.2 for vertical adjustment of the worktable assembly 2.1, a lead screw module assembly 2.3 for driving the upper and lower sliding table adjustment assembly 2.2 to slide vertically on the support frame structure 1, and an internal adjustment component for vertical adjustment of the adjustment table 2.1.8; and The foot impact hammer assembly 2.4 includes an impact hammer 2.4.9, a foot swing arm 2.4.8, a foot drive arm 2.4.7, and a drive structure. The drive structure drives the foot drive arm 2.4.7, and the drive arm drives the foot swing arm 2.4.8 to move together, so that the impact hammer 2.4.9, which is mounted on the lower end of the foot swing arm 2.4.8, accurately impacts the foot of the human foot test assembly at a preset angle and impact speed. The foot drive arm 2.4.7 is equipped with an inclination sensor 2.4.13 for acquiring its rotation angle, the impact hammer 2.4.9 is equipped with an acceleration sensor 2.4.14 for acquiring its impact acceleration, and the dummy foot test assembly 2.1.10 is equipped with a force sensor for acquiring the impact force.

[0020] In this embodiment, the control system can edit or set the parameters of the corresponding calibration test through software, and issue corresponding instructions to the drive structure to perform the corresponding calibration test. The data collected by each sensor is analyzed and calculated by the software, and finally presented in the form of a report.

[0021] The fixing structure includes a detachable foot fixing seat 2.1.5, and the sliding structure includes left and right sliding blocks 2.1.3, a first guide rail 2.1.2 symmetrically arranged on the worktable panel 2.1.1 to guide the left and right sliding blocks 2.1.3, a positioning rack 2.1.7 arranged on the worktable panel 2.1.1, and a buckle 2.1.6 installed on the left and right sliding blocks 2.1.3 and cooperating with the positioning rack 2.1.7 to lock the left and right sliding blocks 2.1.3.

[0022] It also includes an auxiliary locking structure, which includes an auxiliary locking block 2.1.4 and a handle 2.1.9; wherein, the auxiliary locking block 2.1.4 is fixed to the left and right sliding blocks 2.1.3 with screws, and the handle 2.1.9 and the auxiliary locking block 2.1.4 are threadedly connected. When the left and right sliding blocks 2.1.3 slide to the appropriate position, the handle 2.1.9 is rotated so that the rod of the handle 2.1.9 presses against the first guide rail 2.1.2 and locks it.

[0023] The internal adjustment assembly includes an adjustment module 2.2.5 fixedly connected to the adjustment platform 2.1.8, and a stepper motor 2.2.4 that drives the adjustment module 2.2.5 to precisely adjust the adjustment platform 2.1.8 up and down.

[0024] like Figure 2 As shown, the upper and lower sliding table adjustment assembly 2.2 includes a sliding table fixing plate 2.2.1 located below the worktable panel 2.1.1, a sliding table fixing plate 2.2.2 vertically fixed to the sliding table fixing plate 2.2.1, and a sliding seat plate 2.2.3 connected to the lead screw module assembly 2.3. The sliding seat plate 2.2.3 drives the upper and lower sliding table adjustment assembly 2.2 to slide up and down in the vertical direction under the action of the lead screw module assembly 2.3.

[0025] like Figure 3 As shown, the lead screw module assembly 2.3 includes a main frame 2.3.5 fixed on the support frame structure 1, a lead screw module 2.3.6 fixed on the main frame 2.3.5 via a lead screw fixing seat 2.3.7, a lead screw sleeve fixing seat 2.3.8 sleeved on the lead screw module 2.3.6, and a DC motor 2.3.1 and a worm gear reducer 2.3.2 mounted on the main frame 2.3.5; wherein, the DC motor 2.3.1 transmits power to the lead screw module 2.3.6 via the worm gear reducer 2.3.2, and drives the sliding seat plate 2.2.3 connected to it via the lead screw sleeve fixing seat 2.3.8 to drive the upper and lower sliding table adjustment assembly 2.2 to slide up and down in the vertical direction.

[0026] It also includes an upper and lower guide structure, which includes a second guide rail 2.3.4 symmetrically arranged on the main frame 2.3.5 and four guide sliders that cooperate with the second guide rail 2.3.4 to guide the sliding seat plate 2.2.3.

[0027] like Figure 4 and 5 As shown, the foot impact hammer assembly 2.4 includes a foot impact assembly fixing plate 2.4.5 fixed on the support frame structure 1, a foot impact hammer fixing seat 2.4.4 fixed to the foot impact assembly fixing plate 2.4.5, and a foot rotating shaft 2.4.6 disposed between the foot impact hammer fixing seats 2.4.4 and connected to the drive structure; the drive structure includes a planetary reducer 2.4.2 and a servo motor 2.4.1 fixed on the foot impact hammer fixing seat 2.4.4 via a foot reducer fixing seat 2.4.3, the output end of the planetary reducer 2.4.2 is connected to the foot rotating shaft 2.4.6; wherein, the foot drive arm 2.4.7 is rotated by the foot rotating shaft 2.4.6 via a built-in key.

[0028] The foot impact hammer assembly 2.4 also includes an intermediate connecting structure; the intermediate connecting structure includes a magnetic fixing plate 2.4.12 fixed below the foot drive arm 2.4.7, a foot electromagnet 2.4.10 disposed on the magnetic fixing plate 2.4.12, and a magnetic block 2.4.11 disposed on the impact hammer 2.4.9; when the foot drive arm 2.4.7 rotates, the foot swing arm 2.4.8 and the impact hammer 2.4.9 are simultaneously driven to rotate under the magnetic attraction of the foot electromagnet 2.4.10 to the magnetic block 2.4.11.

[0029] like Figure 6 As shown, the foot swing arm 2.4.8 is fixed to the foot rotating shaft 2.4.6 via bearings and bushings. The foot drive arm 2.4.7 is driven by the rotation of the foot rotating shaft 2.4.6 via a built-in key. When the foot drive arm 2.4.7 rotates, the electromagnet on the magnetic fixing plate fixed below the foot drive arm 2.4.7 magnetically attracts the magnetic fixing plate fixed below the impact hammer of the foot swing arm 2.4.8, thereby causing the rotation of the foot drive arm 2.4.7 to drive the rotation of the foot swing arm 2.4.8.

[0030] Specifically, the dummy foot impact testing system includes a foot calibration module 2, a support frame structure 1, and a control system. The foot calibration module 2 includes a worktable assembly 2.1, an upper and lower sliding table adjustment assembly 2.2, a lead screw module assembly 2.3, and a foot impact hammer assembly 2.4. The worktable assembly 2.1 is fixed on the upper and lower sliding table adjustment assembly 2.2. The height of the worktable assembly 2.1 is adjusted by the lead screw module assembly 2.3. The lead screw module assembly 2.3 and the foot impact hammer assembly 2.4 are respectively fixed on the support frame structure 1.

[0031] Furthermore, the dummy foot test assembly 2.1.10 is fixed on the foot mounting base 2.1.5 of the worktable assembly 2.1. It should be noted that different foot mounting bases 2.1.5 can be replaced to perform calibration tests on the feet of different series of dummies. The foot fixing seat 2.1.5 is fixed on the left and right sliding blocks 2.1.3. The left and right sliding blocks 2.1.3 are fixed to the first guide rail 2.1.2, which is fixed on the worktable panel 2.1.1 and symmetrically arranged, to realize the adjustment of the dummy foot test assembly 2.1.10 in the left and right directions. At the same time, the left and right sliding blocks 2.1.3 are locked by the positioning rack 2.1.7 fixed on the worktable panel 2.1.1 and the buckle 2.1.6 mounted on the left and right sliding blocks 2.1.3 to prevent the dummy foot test assembly 2.1.10 from shifting during the impact. The locking block 2.1.4 is used to assist in locking the left and right sliding blocks 2.1.3. The worktable panel 2.1.1 is fixed on the upper and lower sliding table adjustment assembly 2.2. The adjustment table 2.1.8 is fixed to the adjustment module 2.2.5 in the upper and lower sliding table adjustment assembly 2.2, which can realize the precise adjustment of the foot impact position.

[0032] The adjustment module 2.2.5 in the upper and lower slide adjustment assembly 2.2 is fixed to the slide fixed plate 2.2.2 via the adjustment module fixing seat 2.2.6. The power output by the stepper motor 2.2.4 is used to achieve precise adjustment of the height of the adjustment platform 2.1.8 through the adjustment module 2.2.5 to meet the requirements of precise calibration testing of different parts of the foot. The slide fixed plate 2.2.1 is fixed on the slide fixed plate 2.2.2. The slide fixed plate 2.2.2 and the sliding seat plate 2.2.3 are fixedly connected. The sliding seat plate 2.2.3 and the second guide rail 2.3.4 and the lead screw sleeve fixing seat 2.3.8 in the lead screw module assembly 2.3 are fixedly connected.

[0033] The main frame 2.3.5 of the lead screw module assembly 2.3 is fixed to the support frame structure 1. Above the main frame 2.3.5 are a DC motor 2.3.1 and a worm gear reducer 2.3.2. The power provided by the DC motor 2.3.1 is transmitted to the lead screw module 2.3.6 through the worm gear reducer 2.3.2, and the rotational motion of the lead screw is converted into the up-and-down sliding motion of the upper and lower sliding table adjustment assembly 2.2 through the lead screw sleeve fixing seat 2.3.8 fixed on the sliding seat plate 2.2.3, so as to realize the up-and-down height adjustment of the dummy foot test assembly 2.1.10. The worm gear reducer 2.3.2 is fixed to the main frame 2.3.5 and the support frame structure 1 through the reducer fixing seat 2.3.3, and the lead screw module 2.3.6 is fixed to the main frame 2.3.5 through the lead screw fixing seat 2.3.7.

[0034] In the foot impact hammer assembly 2.4, the servo motor 2.4.1 and planetary reducer 2.4.2 are connected and fixed to the foot impact hammer mounting base 2.4.4 via the foot reducer mounting base 2.4.3. The foot impact hammer mounting base 2.4.4 is fixed to the support frame structure 1 via the foot impact assembly mounting plate 2.4.5. The foot shaft 2.4.6 is connected to the output end of the planetary reducer 2.4.2. The foot drive arm 2.4.7 is rotated by the foot shaft 2.4.6 via a built-in key. The impact hammer 2.4.9 is fixed to the lower end of the foot swing arm 2.4.8. The magnetic block 2.4.11 is fixed to the impact hammer 2.4.9, and the magnetic mounting plate 2.4.12 is fixed to the foot drive arm 2.4.7. Below, the foot electromagnet 2.4.10 is fixed on the magnetic fixing plate 2.4.10. The power provided by the servo motor 2.4.1 drives the rotation of the foot drive arm 2.4.7 through the planetary reducer 2.4.2 and the foot shaft 2.4.6. Due to the magnetic attraction of the foot electromagnet 2.4.10 to the magnetic block 2.4.11, the foot swing arm 2.4.8 is also driven to rotate. The tilt sensor 2.4.13 fixed on the foot drive arm 2.4.7 is used to collect the rotation angle of the foot drive arm 2.4.7. The acceleration sensor 2.4.14 is fixed on the impact hammer 2.4.9 and is used to collect the acceleration of the impact hammer 2.4.9 impacting the dummy foot test assembly 2.1.10 during the calibration test. Example 2

[0035] This embodiment provides a method for testing the impact of a dummy foot, including the following steps: The dummy foot test assembly 2.1.10 is fixed by the fixed structure and adjusted left and right by the sliding structure to meet the placement requirements of different dummy foot test assemblies 2.1.10 to be placed on the adjustment platform 2.1.8; The control system allows the upper and lower slide adjustment assembly 2.2 and the lead screw module assembly 2.3 to adjust the worktable assembly 2.1 up and down, and allows the internal adjustment component to adjust the adjustment platform 2.1.8, so that the dummy foot test assembly 2.1.10 meets the precise position requirements of the impact hammer 2.4.9 impacting the foot; The control system controls the drive structure to rotate the foot drive arm 2.4.7 at a set angle and rotation speed. The foot drive arm 2.4.7 drives the foot swing arm 2.4.8 to rotate together, so that the impact hammer 2.4.9 impacts the foot of the dummy foot test assembly 2.1.10 at a preset impact speed and impact angle. Among them, the tilt sensor 2.4.13, the acceleration sensor 2.4.14, and the force sensor collect the corresponding data and transmit them to the control system for storage.

[0036] Specifically, during the calibration test, the control system issues a command, energizing the foot electromagnet 2.4.10 to magnetically attract the magnetic block on the impact hammer 2.4.9. The foot drive arm 2.4.7 rotates through the magnetic attraction, causing the foot swing arm 2.4.8 and the impact hammer to rotate and rise to a preset angle. The control system issues another command, de-energizing the foot electromagnet 2.4.10, eliminating the magnetic attraction. The foot drive arm 2.4.7 remains stationary, while the foot swing arm 2.4.8 rotates and falls under the influence of gravity, causing the impact hammer 2.4.9 to impact the foot of the foot test assembly at a preset impact speed. After the test, the drive structure, under the control of the control system, causes the foot drive arm 2.4.7 to rotate back to its natural hanging state at the set speed.

[0037] The specific procedure for foot impact testing is described below: The dummy foot testing assembly 2.1.10 and the corresponding foot fixing seat 2.1.5 are fixed and installed on the left and right sliding blocks 2.1.3 of the worktable assembly 2.1. The position of the left and right sliding blocks 2.1.3 on the first guide rail 2.1.2 is adjusted to fix the feet of different dummy foot testing assemblies 2.1.10 onto the adjusting table 2.1.8 for impact testing. The dummy foot testing assembly 2.1.10 is fixed by the buckle 2.1.6, the positioning rack 2.1.7, and the locking block 2.1.4. The DC motor 2.3.1 is controlled by the software program to adjust the vertical height of the worktable assembly 2.1, the upper and lower sliding table adjusting assembly 2.2, and the dummy foot testing assembly 2.1.10 according to the set speed. Adjust the approximate position of the impact hammer 2.4.9 impacting the dummy's foot. The software program controls the stepper motor 2.2.4 to adjust the height of the adjusting platform 2.1.8 via the adjusting module 2.2.5, ensuring the impact hammer 2.4.9 strikes the dummy's foot precisely. The software program also controls the servo motor 2.4.1 to rotate the foot drive arm 2.4.7 at a set angle and speed. The magnetic attraction of the foot electromagnet 2.4.10 fixed to the foot drive arm 2.4.7 causes the foot swing arm 2.4.8 and the foot drive arm 2.4.7 to rotate together at a set angle, achieving the required impact speed for the impact hammer 2.4.9 when impacting the upper, lower, and lower parts of the dummy's foot (wearing shoes). During the experiment, the tilt sensor 2.4.13, the acceleration sensor 2.4.14, and the force sensor mounted on the dummy foot test assembly 2.1.10 respectively collected the acceleration of the impact hammer 2.4.9 and the ankle force of the dummy during the impact. The collected data was then transmitted to a computer for storage. The computer can summarize and display the collected data, which facilitates the analysis of the changes in force and torque of the dummy foot test assembly 2.1.10 and acceleration of the impact hammer 2.4.9 during the foot impact test.

[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dummy foot impact testing system, including: The foot calibration module (2), the support frame structure (1), and the control system are characterized in that the foot calibration module (2) comprises: The workbench assembly (2.1) includes a dummy foot test assembly (2.1.10), a fixing structure for fixing the dummy foot test assembly (2.1.10), a sliding structure for driving the fixing structure to slide left and right, and an adjustment table (2.1.8) for providing adjustable foot support for the dummy foot test assembly (2.1.10). The adjustment assembly includes an upper and lower sliding table adjustment assembly (2.2) for vertical adjustment of the worktable assembly (2.1), a lead screw module assembly (2.3) for driving the upper and lower sliding table adjustment assembly (2.2) to slide vertically on the support frame structure (1), and an internal adjustment component for vertical adjustment of the adjustment table (2.1.8); and The foot impact hammer assembly (2.4) includes an impact hammer (2.4.9), a foot swing arm (2.4.8), a foot drive arm (2.4.7), and a drive structure. The drive structure drives the foot drive arm (2.4.7), and the drive arm drives the foot swing arm (2.4.8) to move together, so that the impact hammer (2.4.9) mounted on the lower end of the foot swing arm (2.4.8) accurately impacts the foot of the human foot test assembly at a preset angle and impact speed. The foot drive arm (2.4.7) is equipped with an inclination sensor (2.4.13) for collecting its rotation angle, the impact hammer (2.4.9) is equipped with an acceleration sensor (2.4.14) for collecting its impact acceleration, and the dummy foot test assembly (2.1.10) is equipped with a force sensor for collecting the impact force. During the test, the inclination sensor (2.4.13), acceleration sensor (2.4.14) and force sensor collect the corresponding data and transmit them to the control system for storage.

2. The dummy foot impact testing system according to claim 1, characterized in that: The fixing structure includes a detachable foot fixing seat (2.1.5), and the sliding structure includes left and right sliding blocks (2.1.3), a first guide rail (2.1.2) symmetrically arranged on the worktable panel (2.1.1) to guide the left and right sliding blocks (2.1.3) to slide, and a guide rail (2.1.2) arranged on the worktable panel (2.1.1). The positioning rack (2.1.7) on 2.1.1), and the buckle (2.1.6) installed on the left and right sliding blocks (2.1.3) and cooperating with the positioning rack (2.1.7) to lock the left and right sliding blocks (2.1.3).

3. The dummy foot impact testing system according to claim 2, characterized in that: It also includes an auxiliary locking structure, which includes an auxiliary locking block (2.1.4) and a handle (2.1.9); wherein, the auxiliary locking block (2.1.4) is fixed to the left and right sliding blocks (2.1.3) with screws, and the handle (2.1.9) and the auxiliary locking block (2.1.4) are threaded together. When the left and right sliding blocks (2.1.3) slide to the appropriate position, the handle (2.1.9) is rotated so that the rod of the handle (2.1.9) presses against the first guide rail (2.1.2) and locks it.

4. The dummy foot impact testing system according to claim 2, characterized in that, The internal adjustment assembly includes an adjustment module (2.2.5) fixedly connected to the adjustment platform (2.1.8) and a stepper motor (2.2.4) that drives the adjustment module (2.2.5) to precisely adjust the adjustment platform (2.1.8) up and down.

5. The dummy foot impact testing system according to claim 2, characterized in that, The upper and lower sliding table adjustment assembly (2.2) includes components disposed on the worktable panel ( 2.1.1) The slide table fixing plate one (2.2.1) below, the slide table fixing plate two (2.2.2) vertically fixed to the slide table fixing plate one (2.2.1), and the sliding seat plate (2.2.3) connected to the lead screw module assembly (2.3). The sliding seat plate (2.2.3) drives the upper and lower slide table adjustment assembly (2.2) to slide up and down in the vertical direction under the action of the lead screw module assembly (2.3).

6. The dummy foot impact testing system according to claim 5, characterized in that, The lead screw module assembly (2.3) includes a main frame (2.3.5) fixed on the support frame structure (1), a lead screw module (2.3.6) fixed on the main frame (2.3.5) by a lead screw fixing seat (2.3.7), a lead screw sleeve fixing seat (2.3.8) sleeved on the lead screw module (2.3.6), and a DC motor (2.3.1) and a worm gear reducer (2.3.2) mounted on the main frame (2.3.5); wherein, the DC motor (2.3.1) transmits power to the lead screw module (2.3.6) through the worm gear reducer (2.3.2), and drives the sliding seat plate (2.2.3) connected to it through the lead screw sleeve fixing seat (2.3.8) to drive the upper and lower sliding table adjustment assembly (2.2) to slide up and down in the vertical direction.

7. The dummy foot impact testing system according to claim 6, characterized in that, It also includes an upper and lower guide structure, which includes a second guide rail (2.3.4) symmetrically arranged on the main frame (2.3.5) and four guide sliders that cooperate with the second guide rail (2.3.4) to guide the sliding seat plate (2.2.3).

8. The dummy foot impact testing system according to claim 1, characterized in that, The foot impact hammer assembly (2.4) includes a foot impact assembly fixing plate (2.4.5) fixed on the support frame structure (1), a foot impact hammer fixing seat (2.4.4) fixed to the foot impact assembly fixing plate (2.4.5), and a foot rotating shaft (2.4.6) disposed between the foot impact hammer fixing seats (2.4.4) and connected to the drive structure; the drive structure includes a planetary reducer (2.4.2) and a servo motor (2.4.1) fixed on the foot impact hammer fixing seat (2.4.4) via a foot reducer fixing seat (2.4.3), the output end of the planetary reducer (2.4.2) being connected to the foot rotating shaft (2.4.6); wherein, the foot drive arm (2.4.7) is rotated by the foot rotating shaft (2.4.6) via a built-in key.

9. The dummy foot impact testing system according to claim 1, characterized in that, The foot impact hammer assembly (2.4) also includes an intermediate connecting structure; the intermediate connecting structure includes a magnetic fixing plate (2.4.12) fixed below the foot drive arm (2.4.7), a foot electromagnet (2.4.10) on the magnetic fixing plate (2.4.12), and a magnetic block (2.4.11) on the impact hammer (2.4.9); when the foot drive arm (2.4.7) rotates, the foot swing arm (2.4.8) and the impact hammer (2.4.9) are simultaneously driven to rotate under the magnetic attraction of the foot electromagnet (2.4.10) to the magnetic block (2.4.11).

10. A method for testing the impact of a dummy foot, characterized in that, The dummy foot impact testing system based on any one of claims 1-9 includes the following steps: The dummy foot test assembly (2.1.10) is fixed by the fixing structure and adjusted left and right by the sliding structure to allow the feet of different dummy foot test assemblies (2.1.10) to be placed on the adjustment platform. Placement requirements as per 2.1.8); The control system allows the upper and lower sliding table adjustment assembly (2.2) and the lead screw module assembly (2.3) to adjust the worktable assembly (2.1) up and down, and allows the internal adjustment component to adjust the table (2.1). 2.1.8) Make adjustments to ensure that the dummy foot test assembly (2.1.10) meets the precise positioning requirements of the impact hammer (2.4.9) impacting the foot; The control system controls the drive structure to rotate the foot drive arm (2.4.7) at a set angle and rotation speed. The foot drive arm (2.4.7) drives the foot swing arm (2.4.8) to rotate together, so that the impact hammer (2.4.9) impacts the foot of the dummy foot test assembly (2.1.10) at a preset impact speed and impact angle. in, The tilt sensor (2.4.13), acceleration sensor (2.4.14) and force sensor collect the corresponding data and transmit them to the control system for storage.

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