A lightweight target mannequin

Abstract

The application discloses a light-weight target dummy, which comprises a chest cavity assembly and a chest displacement measuring module arranged in the chest cavity assembly to simulate the deformation of a human chest cavity when the human chest cavity is impacted and compressed; the chest displacement measuring module comprises a first pipe assembly and a second pipe assembly arranged behind the first pipe assembly; the first pipe assembly comprises a first inner pipe and a first outer pipe; the second pipe assembly comprises a second inner pipe and a second outer pipe; the rear part of the second outer pipe is fixedly arranged at the rear part of the chest cavity assembly; a first flange is arranged on the first outer pipe; a second flange is arranged on the second outer pipe; the first flange is fixedly connected with the second flange; a third flange is arranged on the second inner pipe; the first pipe assembly further comprises an intermediate pipe arranged between the first inner pipe and the first outer pipe; a fourth flange is arranged on the intermediate pipe; the third flange is fixedly connected with the fourth flange; the second flange and the third flange are connected in an adjustable connection strength mode; and the first inner pipe and the intermediate pipe are connected in an adjustable connection strength mode. The light-weight target dummy can simulate the internal organ stiffness of different people.

Description

Technical Field

[0001] This invention relates to the field of human safety protection technology, specifically to a lightweight target dummy. Background Technology

[0002] To assess the wounding power of non-lethal weapons, experiments using human targets are necessary to evaluate the damage caused by weapon impact. Currently, the human targets used in these experiments are generally simplified targets. While these simplified targets are expensive, their physiological structure differs significantly from that of a real human body, making it difficult to extrapolate the damage results from simplified targets to real people. To reduce testing costs, some experiments use low-cost dummies. Although inexpensive, these dummies have a simple structure, lacking bones and internal organs, making it impossible to measure human damage. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a lightweight target dummy with high biomimicry and accurate material response characteristics.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A lightweight target dummy includes a thoracic cavity assembly and a chest displacement measurement module disposed within the thoracic cavity assembly to simulate the deformation of the human thoracic cavity under impact and compression.

[0006] The chest displacement measurement module includes a first tube assembly and a second tube assembly disposed behind the first tube assembly. The first tube assembly includes a first inner tube and a first outer tube sleeved outside the first inner tube. The second tube assembly includes a second inner tube and a second outer tube sleeved outside the second inner tube. The rear part of the second outer tube is fixedly disposed at the rear part of the chest cavity assembly.

[0007] The rear end of the first outer tube is provided with a first flange, and the front end of the second outer tube is provided with a second flange. The first flange and the second flange are fixedly connected.

[0008] A third flange is provided at the front end of the second inner tube;

[0009] The first pipe assembly further includes an intermediate pipe located at the rear end of the first pipe assembly and disposed between the first inner pipe and the first outer pipe, wherein a fourth flange is provided at the rear end of the intermediate pipe; the third flange is fixedly connected to the fourth flange.

[0010] The second flange is connected to the third flange with adjustable connection strength; the first inner tube is connected to the intermediate tube with adjustable connection strength.

[0011] In some embodiments, the second flange is welded to the third flange, and the connection strength between the second flange and the third flange is changed by changing the number of weld points between them.

[0012] In some embodiments, the first inner tube is welded to the intermediate tube, and the connection strength between the first inner tube and the intermediate tube is changed by changing the number of weld points between the first inner tube and the intermediate tube.

[0013] In some embodiments, a plurality of first defect guide grooves are provided at intervals along the length of the rear portion of the first inner tube, and each of the first defect guide grooves is located in front of the intermediate tube.

[0014] In some embodiments, the first inner tube extends rearward into the second inner tube, and there is a gap between the outer wall of the first inner tube and the inner wall of the second inner tube. The first inner tube is provided with a positioning part that protrudes outward from the outer periphery of the first inner tube, and the positioning part abuts against the inner wall of the second inner tube.

[0015] In some embodiments, the front portion of the second inner tube is provided with a plurality of second defect guide grooves spaced apart along its length, and each of the second defect guide grooves is located behind the positioning portion.

[0016] In some embodiments, the stiffness of the first outer tube is E1, the stiffness of the first inner tube is E2, the stiffness of the second inner tube is E3, and the stiffness of the second outer tube is E4, where E1 < E3 < E2 < E4.

[0017] In some embodiments, the thoracic cavity assembly includes a thoracic vertebra and a rib assembly disposed on the thoracic vertebra. The rib assembly includes a rib fixation plate and ribs disposed on the left and right sides of the rib fixation plate. The ribs on both sides are symmetrically arranged, each having a U-shaped structure, and multiple ribs are spaced apart in the vertical direction. The front part of each rib is fixedly disposed on the rib fixation plate, and the rear part of each rib is fixedly disposed on the rear part of the thoracic vertebra.

[0018] The rib includes a rib body, a rib damper disposed on the inner side of the rib body, and a pressure sensor. The rib damper extends along the length of the rib body and is made of a polymer material. The pressure sensor is embedded between the rib body and the rib damper.

[0019] In some embodiments, the dummy further includes a pelvic assembly connected to the thoracic cavity assembly, the pelvic assembly including a pelvic body and a fifth flange disposed at the lower part of the pelvic body and connected to the lower limb assembly, the pelvic body being integrally molded from a polymer material.

[0020] In some embodiments, the dummy further includes an upper limb assembly connected to the thoracic cavity assembly. The upper limb assembly is connected to the left and right sides of the thoracic cavity assembly. Each side of the upper limb assembly includes a shoulder connector, an upper arm, an elbow joint, a forearm, a wrist joint, and a hand support. The shoulder connector is fixedly connected to the thoracic cavity assembly. One end of the upper arm is rotatably connected to the shoulder connector. One of the other ends of the upper arm and one end of the forearm is rotatably connected to the elbow joint, and the other end is fixedly connected to the elbow joint. The other end of the forearm is rotatably connected to the wrist joint. The hand support is rotatably connected to the wrist joint.

[0021] The dummy also includes a pelvic assembly connected to the thoracic cavity assembly and a lower limb assembly connected to the pelvic assembly. The lower limb assemblies are connected to the left and right sides of the pelvic assembly. Each side of the lower limb assembly includes a leg connector, a thigh, a knee joint, a calf, an ankle joint, and a foot. The leg connector is fixedly connected to the pelvic assembly. The knee joint includes an upper knee joint and a lower knee joint that are rotatably connected. One end of the thigh is rotatably connected to the leg connector, and the other end of the thigh is fixedly connected to the upper knee joint. One end of the calf is fixedly connected to the lower knee joint, and the other end of the calf is fixedly connected to the ankle joint. The foot is rotatably connected to the ankle joint. Both the thigh and the calf are made of polymer material.

[0022] Due to the application of the above technical solution, this invention has the following advantages compared with the prior art: The lightweight target dummy of this invention uses a chest displacement measurement module to simulate the deformation of the human chest cavity under impact and compression. The chest displacement measurement module adopts a multi-component combination method, which can simulate the visceral stiffness of different groups (e.g., men, women, the elderly, etc.), which is more in line with the dummy design concept and allows for more intuitive observation of chest cavity displacement. This enables a more realistic simulation of weapon damage to the human body and provides more data support for designing safer and more effective protective devices. Furthermore, it avoids the use of live animal viscera. Attached Figure Description

[0023] Appendix Figure 1 This is a three-dimensional schematic diagram of the lightweight target dummy in this embodiment;

[0024] Appendix Figure 2 This is a three-dimensional schematic diagram of the thoracic cavity assembly in this embodiment (partial structural perspective view);

[0025] Appendix Figure 3 This is a three-dimensional schematic diagram of the pelvic component in this embodiment;

[0026] Appendix Figure 4This is a three-dimensional schematic diagram of the upper limb component in this embodiment;

[0027] Appendix Figure 5 This is a three-dimensional schematic diagram of the lower limb assembly in this embodiment;

[0028] Appendix Figure 6 This is a three-dimensional schematic diagram of the chest displacement measurement module in this embodiment;

[0029] Appendix Figure 7 This is a cross-sectional schematic diagram of the chest displacement measurement module in this embodiment;

[0030] Appendix Figure 8 This is a cross-sectional schematic diagram of the chest displacement measurement module in this embodiment (a first defect guide groove is provided on the first inner tube);

[0031] Appendix Figure 9 This is a cross-sectional schematic diagram of the chest displacement measurement module in this embodiment (a second defect guide groove is provided on the second inner tube);

[0032] Appendix Figure 10 This is a schematic diagram of the deformation of the chest displacement measurement module in this embodiment (Embodiment 1);

[0033] Appendix Figure 11 This is a schematic diagram of the deformation of the chest displacement measurement module in this embodiment (Embodiment 2);

[0034] Appendix Figure 12 This is a schematic diagram of the deformation of the chest displacement measurement module in this embodiment (Embodiment 3).

[0035] The components include: 1. Thoracic cavity assembly; 111. Lateral thoracic vertebrae; 112. Anterior thoracic vertebrae; 113. Posterior thoracic vertebrae; 121. Rib fixation plate; 122. Rib body; 123. Rib damping; 2. Pelvic assembly; 21. Pelvic body; 22. Fifth flange; 3. Upper limb assembly; 31. Shoulder connector; 311. First fixation part; 312. First rotation part; 32. Upper arm; 33. Elbow joint; 34. Lower arm; 35. Wrist joint; 36. Palm support; 4. Lower limb assembly; 41. Leg connector; 411. Second fixation part; 412. Second rotation part; 42. Thigh; 421. Thigh body; 422. Thigh replacement; 43. Knee joint; 431. Upper knee joint; 432. Lower knee joint; 44. Lower leg; 441. Lower leg body; 442. Lower leg replacement; 45. Ankle joint; 46. Foot; 5. Chest displacement measurement module; 51. First inner tube; 511. Positioning part; 512. First defect guide groove; 52. First outer tube; 521. First flange; 53. Second inner tube; 531. Third flange; 532. Second defect guide groove; 54. Second outer tube; 541. Second flange; 55. Intermediate tube; 551. Fourth flange. Detailed Implementation

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] In the following description, the directions "front," "back," "left," "right," "up," and "down" refer to the human body. "Front" refers to the direction the face faces, "back" to the back, "up" to the top of the head, and "down" to the feet. The left and right sides of the body are correspondingly "left" and "right." These definitions of direction are merely for ease of description and simplification of the invention, 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 the invention.

[0038] like Figure 1 As shown, the lightweight target dummy of the present invention includes a thoracic cavity assembly 1, a pelvic assembly 2 connected to the thoracic cavity assembly 1, an upper limb assembly 3 connected to the thoracic cavity assembly 1, and a lower limb assembly 4 connected to the pelvic assembly 2.

[0039] like Figure 1 and Figure 2 As shown, the thoracic cavity assembly 1 includes thoracic vertebrae and rib assemblies.

[0040] In this embodiment, such as Figure 2 As shown, the thoracic vertebrae include thoracic lateral plates 111, thoracic anterior plates 112, and thoracic posterior plates 113. The thoracic lateral plates 111 are respectively located on the left and right sides, and the thoracic anterior plates 112 and thoracic posterior plates 113 are connected between the left and right thoracic lateral plates 111. The thoracic anterior plate 112 is located in front of the thoracic posterior plate 113.

[0041] The rib cage is located on the thoracic vertebrae. Specifically, such as... Figure 2 As shown, the rib assembly includes a rib fixation plate 121 and ribs. The rib fixation plate 121 is located in front of the thoracic vertebrae, and the ribs are respectively located on the left and right sides of the rib fixation plate 121. The ribs on both sides are symmetrically arranged, and multiple ribs are spaced apart in the vertical direction. The front part of the ribs on each side is fixed on the rib fixation plate 121, and the rear part of the ribs on each side is fixed on the posterior plate 113 of the thoracic vertebrae.

[0042] The ribs have a U-shaped structure, with the openings of the U-shaped structures of the left and right ribs facing each other. The thoracic vertebrae are located inside the space enclosed by the left and right ribs.

[0043] like Figure 2 As shown, the rib includes a rib body 122, a rib damper 123, and a pressure sensor. The rib body 122 has a U-shaped structure. The rib damper 123 is located on the inner side of the rib body 122 and extends along the length of the rib body 122. The pressure sensor is used to measure the impact load borne by the thoracic cavity assembly during the test.

[0044] The rib damper 123 is made of a polymer material, specifically the material disclosed in patent document ZL2021116004021. Using a polymer material for the rib damper 123 reduces the weight of the dummy while simultaneously simulating the physical characteristics of a Chinese person during testing.

[0045] In this embodiment, the pressure sensor is a diaphragm array pressure sensor, which is embedded between the rib body 122 and the rib damper 123.

[0046] In this embodiment, the rib body 122, the rib damper 123, and the pressure sensor are connected by adhesive.

[0047] The thoracic cavity assembly 1 may also include a counterweight set on the thoracic vertebrae, through which the dummy's center of gravity position and weight can be adjusted.

[0048] Other sensors and a data acquisition module can also be installed inside the thoracic cavity assembly 1. The sensors and the data acquisition module are electrically connected, and the data acquisition module is electrically connected to a controller located outside the target dummy, so that the data measured by the sensors can be transmitted to the controller for processing through the data acquisition module.

[0049] like Figure 1 and Figure 3 As shown, the pelvic assembly 2 includes a pelvic body 21, with the lower parts of the left and right thoracic vertebral lateral plates 111 fixedly mounted on the pelvic body 21. The pelvic body 21 is integrally molded from a polymer material, which can be polyethylene. The pelvic body 21 is made of a polymer material that has a shear modulus and elastic modulus similar to that of human bones, simulating the condition where human bones are subjected to direct impact from external objects or uniaxial impact loads leading to bone fracture and failure.

[0050] like Figure 3 As shown, the pelvic assembly 2 also includes a fifth flange 22, which is fixedly connected to the lower part of the pelvic body 21 and is used to connect the lower limb assembly 4. The fifth flange 22 is respectively located on the left and right sides of the pelvic body 21.

[0051] like Figure 1 As shown, the upper limb component 3 is connected to the left and right sides of the thoracic cavity component 1, respectively. Figure 4 As shown, each upper limb component 3 includes a shoulder connector 31, an upper arm 32, an elbow joint 33, a lower arm 34, a wrist joint 35, and a palm support 36.

[0052] The shoulder connector 31 includes a first fixing part 311 and a first rotating part 312, which are rotatably connected about a pivot extending in the left-right direction. The first fixing part 311 is fixedly connected to the thoracic vertebral lateral plate 111 on the corresponding side. One end of the upper arm 32 is rotatably connected to the first rotating part 312 about a pivot extending in the front-back direction. One end of the upper arm 32 and one end of the lower arm 34 are rotatably connected to the elbow joint 33, and the other end is fixedly connected to the elbow joint 33. The other end of the lower arm 34 is rotatably connected to the wrist joint 35. In this embodiment, the other end of the upper arm 32 is rotatably connected to the elbow joint 33, and one end of the lower arm 34 is fixedly connected to the elbow joint 33. The palm support 36 is rotatably connected to the wrist joint 35.

[0053] In the components that make up the upper limb assembly 3, a damping structure can be provided between two rotatably connected components to limit the flexibility of rotation between the two components so as to match the range of motion of the corresponding part of the human body.

[0054] like Figure 1 As shown, the lower limb component 4 is connected to the left and right sides of the pelvic component 2, respectively. Figure 5 As shown, each lower limb assembly includes a leg connector 41, thigh 42, knee joint 43, calf 44, ankle joint 45, and foot 46.

[0055] The leg connector 41 includes a second fixing part 411 and a second rotating part 412. The second fixing part 411 and the second rotating part 412 are rotatably connected about a pivot extending in the left-right direction. The second fixing part 411 is fixedly connected to the fifth flange 22 on the corresponding side.

[0056] The knee joint 43 includes an upper knee joint 431 and a lower knee joint 432, which are rotatably connected.

[0057] One end of the thigh 42 is rotatably connected to the second rotating part 412 about a pivot extending in the front-back direction, and the other end of the thigh 42 is fixedly connected to the upper knee joint 431. One end of the lower leg 44 is fixedly connected to the lower knee joint 432, and the other end of the lower leg 44 is fixedly connected to the ankle joint 45. The foot 46 is rotatably connected to the ankle joint 45.

[0058] Both the thigh (42) and lower leg (44) are made of polymer materials, designed with shear modulus and elastic modulus similar to those of human bones. This simulates the conditions under which human bones fracture due to direct impact from external objects or uniaxial impact loads. The polymer material can be polyethylene.

[0059] In the components that make up the lower limb assembly 4, a damping structure can be provided between two rotatably connected components to limit the flexibility of rotation between the two components so as to match the range of motion of the corresponding part of the human body.

[0060] The thigh 42 and lower leg 44 can be designed as separate structures, and parts of the thigh 42 and lower leg 44 can be replaced with force sensors, thus allowing for the testing of the forces acting on the thigh 42 and lower leg 44 during the experiment. Figure 5 As shown, the thigh 42 includes a thigh body 421 and a thigh substitute 422 fixedly connected to the thigh body 421. The thigh substitute 422 can be replaced by a force sensor. The lower leg 44 includes a lower leg body 441 and a lower leg substitute 442 fixedly connected to the lower leg body 441. The lower leg substitute 442 can be replaced by a force sensor.

[0061] The dummy also includes a chest displacement measurement module 5, which is located inside the chest cavity assembly 1 and is used to simulate the deformation of the human chest cavity when subjected to impact and compression.

[0062] To simulate and visually observe the deformation of internal organs within a dummy's chest cavity after impact, the chest displacement measurement module 5 employs a multi-component combination. Its overall structure consists of two parts: the rear part is primarily mounted and fixed to the thoracic vertebrae, while the front part undergoes impact deformation. Designing the chest displacement measurement module 5 with a multi-structure, multi-stiffness combination allows for the simulation of visceral stiffness in different populations, such as men, women, and the elderly, making it more consistent with dummy design principles. Furthermore, compared to traditional sensors, it provides a more direct observation of chest cavity displacement and avoids the use of live animal organs.

[0063] In this embodiment, the chest displacement measurement module 5 is composed of circular tubes of different stiffnesses, forming a two-section structure consisting of a deformation section and a transition section. Specifically, as shown... Figures 6-9 As shown, the chest displacement measurement module 5 includes a first tube assembly and a second tube assembly disposed behind the first tube assembly, with the first tube assembly and the second tube assembly being coaxially arranged.

[0064] like Figures 7-9 As shown, the first tube assembly includes a first inner tube 51 and a first outer tube 52. The first outer tube 52 is sleeved outside the first inner tube 51, and there is a gap between the outer wall of the first inner tube 51 and the inner wall of the first outer tube 52.

[0065] like Figures 7-9 As shown, the second tube assembly includes a second inner tube 53 and a second outer tube 54. The second outer tube 54 is sleeved outside the second inner tube 53. There is a gap between the outer wall of the second inner tube 53 and the inner wall of the second outer tube 54. The rear ends of the second inner tube 53 and the second outer tube 54 are both fixedly mounted on the posterior plate 113 of the thoracic vertebra.

[0066] like Figures 7-9 As shown, the first inner tube 51 extends rearward into the second inner tube 53. There is a gap between the outer wall of the first inner tube 51 and the inner wall of the second inner tube 53. A positioning part 511 is provided on the first inner tube 51, protruding outward from the outer circumference of the first inner tube 51. The positioning part 511 abuts against the inner wall of the second inner tube 53. This arrangement can compensate for the gap between the first inner tube 51 and the second inner tube 53, avoid shaking, and make the overall structure of the chest displacement measurement module 5 more stable.

[0067] like Figures 6-9 As shown, a first flange 521 is provided at the rear end of the first outer tube 52. In this embodiment, the first flange 521 is welded to the rear end of the first outer tube 52.

[0068] like Figures 6-9 As shown, a second flange 541 is provided at the front end of the second outer tube 54. In this embodiment, the second flange 541 is welded to the front end of the second outer tube 54.

[0069] The first flange 521 and the second flange 541 are fixedly connected by bolts.

[0070] like Figures 7-9 As shown, a third flange 531 is provided at the front end of the second inner tube 53. In this embodiment, the third flange 531 is welded to the front end of the second inner tube 53.

[0071] like Figures 7-9 As shown, the first pipe assembly also includes an intermediate pipe 55, which is located at the rear end of the first pipe assembly and disposed within the gap between the first inner pipe 51 and the first outer pipe 52. A fourth flange 551 is provided at the rear end of the intermediate pipe 55. In this embodiment, the fourth flange 551 is welded to the rear end of the intermediate pipe 55.

[0072] The third flange 531 and the fourth flange 551 are fixedly connected by bolts.

[0073] The second flange 541 and the third flange 531 are connected with adjustable strength; the first inner pipe 51 and the intermediate pipe 55 are connected with adjustable strength.

[0074] In this embodiment, the second flange 541 and the third flange 531 are welded together, and the connection strength between the second flange 541 and the third flange 531 is changed by altering the number of weld points between them. The first inner pipe 51 is welded together with the intermediate pipe 55, and the connection strength between the first inner pipe 51 and the intermediate pipe 55 is changed by altering the number of weld points between them.

[0075] The stiffness range of the chest displacement measuring module 5 can be adjusted by changing the connection strength between the second flange 541 and the third flange 531, and by changing the connection strength between the first inner tube 51 and the intermediate tube 55. Several combinations are provided in this invention.

[0076] Example 1

[0077] In this embodiment, the second flange 541 and the third flange 531 are normally welded together, and the first inner tube 51 and the intermediate tube 55 are normally welded together. Thus, during the deformation process under impact load, the first outer tube 52 and the first inner tube 51 deform simultaneously, such as... Figure 10 As shown.

[0078] In this embodiment, a plurality of first defect guide grooves 512 can be provided at intervals along the length of the rear part of the first inner tube 51, and each first defect guide groove 512 is located in front of the intermediate tube 55, such as Figure 8 As shown. The first defect guide groove 512 can separate the deformation areas of the first outer tube 52 and the first inner tube 51, preventing the accumulation of deformation of the first outer tube 52 and the first inner tube 51 from affecting the results. Moreover, it only allows the first outer tube 52 and the first inner tube 51 to generate displacement in the axial direction, and does not generate displacement or deflection in other directions.

[0079] The overall stiffness of the chest displacement measurement module 55 is calculated only for the area deformed by impact, and the specific calculation method is as follows.

[0080] Assuming the mass of the impacting object applying the impact load to the dummy is M, and the initial velocity of the deformed component in the chest displacement measurement module 5 is v, then the initial energy of the deformed component in the chest displacement measurement module 5 before the impact is:

[0081]

[0082] Based on the overall energy distribution relationship, let the energy absorption ratio of the deformation zone be k, the deformation space of the deformation zone be L, and the stiffness of the deformation zone be F, then:

[0083] k x1 E x1 +k x2 E x2 +......=∫F x1 dL x1 +∫F x2 dL x2 +...... (2)

[0084] The overall stiffness F of the chest displacement measurement module was obtained. z The formula is:

[0085]

[0086] In the above formulas (2) and (3), x1, x2, ... represent the deformed components, which in this embodiment refer to the first outer tube 52 and the first inner tube 51.

[0087] Example 2

[0088] In this embodiment, the first inner tube 51 and the intermediate tube 55 are normally welded together, while the welded connection between the second flange 541 and the third flange 531 is weakened. Thus, when subjected to an impact load, the welded connection between the second flange 541 and the third flange 531 immediately fails, and the first inner tube 51 drives the second inner tube 53 to move, causing the first outer tube 52 and the second inner tube 53 to deform simultaneously during the deformation process. Figure 11 As shown.

[0089] Multiple second defect guide grooves 532 can be provided at intervals along the length of the front part of the second inner tube 53, and each second defect guide groove 532 is located behind the positioning part 512. In this way, when subjected to impact load, the second inner tube 53 can be smoothly compressed within the second outer tube 54.

[0090] In this embodiment, the overall stiffness F of the chest displacement measurement module can also be calculated according to formulas (1) to (3) in embodiment 1. z In this embodiment, x1 and x2 refer to the first outer tube 52 and the second inner tube 53, respectively.

[0091] Example 3

[0092] In this embodiment, the second flange 541 and the third flange 531 are normally welded together, weakening the welded connection between the first inner tube 51 and the intermediate tube 55.

[0093] Thus, when subjected to impact loads, the welded connection between the first inner tube 51 and the intermediate tube 55 immediately fails. During deformation, the first inner tube 51 slides into the second inner tube 53, causing the first outer tube 52 to deform independently. Figure 12 As shown.

[0094] In this embodiment, the overall stiffness F of the chest displacement measurement module can also be calculated according to formulas (1) to (3) in embodiment 1. z In this embodiment, x1 refers to the first outer tube 52, and there is no x2.

[0095] In the above embodiments, the cross-sectional dimensions of the first outer tube 52 are φ28mm*1mm, the cross-sectional dimensions of the second outer tube 54 are φ30mm*3mm, the cross-sectional dimensions of the first inner tube 51 are φ14.5mm*1.5mm, and the cross-sectional dimensions of the second inner tube 53 are φ17.5mm*0.7mm. The structural materials of the first inner tube 51, the first outer tube 52, the second inner tube 53, and the second outer tube 54 are all 6060 aluminum alloy, with the following parameters: density ρ = 2.7 × 10⁻⁶ kg·mm⁻³, elastic modulus E = 83 GPa, Poisson's ratio μ = 0.3, and yield strength σb = 276 MPa. Aluminum alloy has advantages such as high energy absorption ratio, light weight, stable deformation, simple structure, and easy assembly.

[0096] The stiffness of the first outer tube 52 is E1, the stiffness of the first inner tube 51 is E2, the stiffness of the second inner tube 53 is E3, and the stiffness of the second outer tube 54 is E4, where E1 < E3 < E2 < E4. The second outer tube 54, as the supporting part, has the highest stiffness and does not deform. The main concern is the combined deformation caused by the welding failure location. The overall structural stiffness is changed by altering the welding failure location, as detailed below:

[0097] a) In the modified combination of Example 1, when the welded connection between the second flange 541 and the third flange 531 and the welded connection between the first inner tube 51 and the intermediate tube 55 do not fail, the chest displacement measuring module 5 will be crushed by the first outer tube 52 and the first inner tube 51 during the impact process, and the structural stiffness is the maximum stiffness E1+E2.

[0098] b) In the modified combination of Example 2, when the welded connection between the first inner tube 51 and the intermediate tube 55 does not fail and the welded connection between the second flange 541 and the third flange 531 fails, the chest displacement measuring module 5 will be crushed by the first outer tube 52 and the second inner tube 53 during the impact process. At this time, the structural stiffness is the intermediate stiffness E1+E3.

[0099] c) In the modified combination of Example 3, when the welded connection between the second flange 541 and the third flange 531 does not fail and the welded connection between the first inner tube 51 and the intermediate tube 55 fails, the chest displacement measuring module 5 will slide the first inner tube 51 into the second inner tube 53 during the impact process, and the first outer tube 52 will be crushed alone. At this time, the structural stiffness is the minimum stiffness E1.

[0100] In the above embodiments, the normal welding connection refers to a ring of eight weld points, while the weakened welding connection refers to reducing the number of weld points, i.e., using four weld points, and weakening the weld points by grinding, cutting, or other methods.

[0101] The target dummy can also have skin wrapped around the chest cavity component 1, pelvic component 2, upper limb component 3, and lower limb component 4. The simulated skin needs to have a certain degree of softness and smoothness, and the skin hardness is Shore A. It has good wear resistance and tear resistance, which can simulate the impact load transmission path and dissipation form similar to that of the human body.

[0102] The target dummy's external dimensions meet the 50th percentile anthropometric specifications in GB / T 10000-1988 "Anthropometric Dimensions of Chinese Adults".

[0103] The working principle of this target dummy is as follows:

[0104] A target dummy is mounted on a standing platform and placed in a weapon damage test environment. When the dummy is hit, sensors in the chest cavity and limbs record the impact data, which is then read by a data acquisition module. After the test, the dummy's structure is disassembled to observe whether the internal organs are damaged by the impact. The damage to the internal organs caused by the weapon impact is assessed by measuring the deformation of the deformable components in the chest displacement measurement module 5.

[0105] Of course, the target dummy can also be mounted on a seated fixed platform for testing.

[0106] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A lightweight target dummy, characterized in that: It includes a thoracic cavity assembly and a chest displacement measurement module disposed within the thoracic cavity assembly to simulate the deformation of the human thoracic cavity under impact and compression. The chest displacement measurement module includes a first tube assembly and a second tube assembly disposed behind the first tube assembly. The first tube assembly includes a first inner tube and a first outer tube sleeved outside the first inner tube. The second tube assembly includes a second inner tube and a second outer tube sleeved outside the second inner tube. The rear part of the second tube assembly is fixedly disposed at the rear part of the chest cavity assembly. The rear end of the first outer tube is provided with a first flange, and the front end of the second outer tube is provided with a second flange. The first flange and the second flange are fixedly connected. A third flange is provided at the front end of the second inner tube; The first pipe assembly further includes an intermediate pipe located at the rear end of the first pipe assembly and disposed between the first inner pipe and the first outer pipe, wherein a fourth flange is provided at the rear end of the intermediate pipe; the third flange is fixedly connected to the fourth flange. The second flange is connected to the third flange with adjustable connection strength; the first inner tube is connected to the intermediate tube with adjustable connection strength.

2. The lightweight target dummy according to claim 1, characterized in that: The second flange is welded to the third flange, and the connection strength between the second flange and the third flange is changed by changing the number of weld points between them.

3. The lightweight target dummy according to claim 1, characterized in that: The first inner tube is welded to the intermediate tube, and the connection strength between the first inner tube and the intermediate tube is changed by changing the number of weld points between them.

4. The lightweight target dummy according to claim 1, characterized in that: The rear part of the first inner tube is provided with a plurality of first defect guide grooves at intervals along its length, and each of the first defect guide grooves is located in front of the intermediate tube.

5. The lightweight target dummy according to claim 1, characterized in that: The first inner tube extends rearward into the second inner tube. There is a gap between the outer wall of the first inner tube and the inner wall of the second inner tube. The first inner tube is provided with a positioning part that protrudes outward from the outer circumference of the first inner tube, and the positioning part abuts against the inner wall of the second inner tube.

6. The lightweight target dummy according to claim 5, characterized in that: The front part of the second inner tube is provided with a plurality of second defect guide grooves at intervals along its length, and each second defect guide groove is located behind the positioning part.

7. The lightweight target dummy according to claim 1, characterized in that: The stiffness of the first outer tube is E1, the stiffness of the first inner tube is E2, the stiffness of the second inner tube is E3, and the stiffness of the second outer tube is E4, where E1 < E3 < E2 < E4.

8. The lightweight target dummy according to claim 1, characterized in that: The thoracic cavity assembly includes thoracic vertebrae and rib assemblies disposed on the thoracic vertebrae. The rib assembly includes a rib fixation plate and ribs disposed on the left and right sides of the rib fixation plate. The ribs on both sides are symmetrically arranged, each with a U-shaped structure, and multiple ribs are spaced apart in the vertical direction. The front part of each rib is fixedly disposed on the rib fixation plate, and the rear part of each rib is fixedly disposed on the rear part of the thoracic vertebrae. The rib includes a rib body, a rib damper disposed on the inner side of the rib body, and a pressure sensor. The rib damper extends along the length of the rib body and is made of a polymer material. The pressure sensor is embedded between the rib body and the rib damper.

9. The lightweight target dummy according to claim 1, characterized in that: The dummy also includes a pelvic assembly connected to the thoracic cavity assembly. The pelvic assembly includes a pelvic body and a fifth flange disposed at the lower part of the pelvic body and connected to the lower limb assembly. The pelvic body is integrally molded from a polymer material.

10. The lightweight target dummy according to claim 1, characterized in that: The dummy also includes upper limb assemblies connected to the thoracic cavity assembly. The upper limb assemblies are connected to the left and right sides of the thoracic cavity assembly. Each upper limb assembly includes a shoulder connector, an upper arm, an elbow joint, a forearm, a wrist joint, and a hand support. The shoulder connector is fixedly connected to the thoracic cavity assembly. One end of the upper arm is rotatably connected to the shoulder connector. One end of the upper arm and one end of the forearm are rotatably connected to the elbow joint, and the other end is fixedly connected to the elbow joint. The other end of the forearm is rotatably connected to the wrist joint. The hand support is rotatably connected to the wrist joint. The dummy also includes a pelvic assembly connected to the thoracic cavity assembly and a lower limb assembly connected to the pelvic assembly. The lower limb assemblies are connected to the left and right sides of the pelvic assembly. Each side of the lower limb assembly includes a leg connector, a thigh, a knee joint, a calf, an ankle joint, and a foot. The leg connector is fixedly connected to the pelvic assembly. The knee joint includes an upper knee joint and a lower knee joint that are rotatably connected. One end of the thigh is rotatably connected to the leg connector, and the other end of the thigh is fixedly connected to the upper knee joint. One end of the calf is fixedly connected to the lower knee joint, and the other end of the calf is fixedly connected to the ankle joint. The foot is rotatably connected to the ankle joint. Both the thigh and the calf are made of polymer material.

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