Light target dummy

Abstract

The invention discloses a light target dummy which comprises a chest assembly and a chest displacement measuring module arranged in the chest assembly and used for simulating deformation of the chest of a human body when the chest is impacted and compressed. The chest displacement measuring module comprises a first tube assembly and a second tube assembly arranged behind the first tube assembly, the first tube assembly comprises a first inner tube and a first outer tube, the second tube assembly comprises a second inner tube and a second outer tube, and the rear part of the second outer tube is fixedly arranged at the rear part of the chest assembly; a first flange is arranged on the first outer pipe, a second flange is arranged on the second outer pipe, and 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 a middle pipe arranged between the first inner pipe and the first outer pipe, and the middle pipe is provided with a fourth flange. The third flange is fixedly connected with the fourth flange; the second flange and the third flange are connected in an adjustable connection strength manner; the first inner pipe is connected with the middle pipe in an adjustable connection strength mode. The light target dummy can simulate the visceral stiffness of different crowds.

Description

Technical Field

[0001] The invention relates to the technical field of human body safety protection, and in particular to a lightweight target dummy. Background Art

[0002] In order to evaluate the injury power of non-lethal weapons, relevant tests need to be conducted using human targets to evaluate the damage caused by weapon impact to the human body. In the prior art, the human targets used in the tests are generally simple human targets. Simple human targets are expensive, but there is a huge gap between their physiological structure and the real human body. It is difficult to deduce the damage results of simple human targets to real people. In order to reduce the cost of the test, some tests use low-cost dummies. Although the cost is low, their structure is simple, they have no bones and internal organs, etc., and human injuries cannot be measured. Summary of the invention

[0003] The purpose of the present invention is to provide a lightweight target dummy with a high degree of bionics and accurate material response characteristics in view of the deficiencies in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A lightweight target dummy, comprising a chest cavity component and a chest displacement measurement module arranged in the chest cavity component for simulating the deformation of the human chest cavity when it is impacted and compressed;

[0006] The chest displacement measurement module includes a first tube assembly and a second tube assembly arranged 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, and the rear portion of the second outer tube is fixedly arranged at the rear portion of the chest cavity assembly;

[0007] A first flange is disposed at the rear end of the first outer tube, a second flange is disposed at the front end of the second outer tube, and the first flange is fixedly connected to the second flange;

[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 arranged between the first inner pipe and the first outer pipe, and the rear end of the intermediate pipe is provided with a fourth flange; 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 middle tube with adjustable connection strength.

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

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

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

[0014] In some embodiments, the first inner tube partially extends backward 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 portion protruding outward from the outer circumferential surface of the first inner tube, and the positioning portion is abutted against the inner wall of the second inner tube.

[0015] In some embodiments, a front portion of the second inner tube is provided with a plurality of second defect guiding grooves at intervals along its length direction, and each of the second defect guiding 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, the stiffness of the second outer tube is E4, and E1<E3<E2<E4.

[0017] In some embodiments, the thoracic cavity assembly includes a thoracic vertebra and a rib assembly arranged on the thoracic vertebra, the rib assembly includes a rib fixing plate and ribs respectively arranged on the left and right sides of the rib fixing plate, the ribs on both sides are symmetrically arranged, both are U-shaped structures, and multiple ribs are arranged at intervals along the up and down directions, the front part of the ribs on each side are fixedly arranged on the rib fixing plate, and the rear part of the ribs on each side are fixedly arranged on the rear part of the thoracic vertebra;

[0018] The rib comprises a rib body, a rib damper arranged on the inner side of the rib body and a pressure sensor. The rib damper extends along the length direction of the rib body. The rib damper is made of 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 assembly, the pelvic assembly including a pelvic body and a fifth flange disposed at the lower portion of the pelvic body and connected to the lower limb assembly, and the pelvic body is integrally formed by polymer materials.

[0020] In some embodiments, the dummy further comprises an upper limb assembly connected to the chest assembly, the upper limb assembly being connected to the left and right sides of the chest assembly, the upper limb assembly on each side comprising a shoulder connector, an upper arm, an elbow joint, a lower arm, a wrist joint and a palm support; the shoulder connector is fixedly connected to the chest assembly; one end of the upper arm is rotatably connected to the shoulder connector, one of the other end of the upper arm and one end of the lower arm is rotatably connected to the elbow joint, the other is fixedly connected to the elbow joint, and the other end of the lower arm is rotatably connected to the wrist joint; the palm support is rotatably connected to the wrist joint;

[0021] The dummy also includes a pelvic assembly connected to the thoracic assembly and a lower limb assembly connected to the pelvic assembly, the lower limb assembly is connected to the left and right sides of the pelvic assembly, and the lower limb assembly on each side includes a leg connecting piece, a thigh, a knee joint, a calf, an ankle joint and a foot; the leg connecting piece 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 connecting piece, 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; the thigh and the calf are both made of polymer materials.

[0022] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the chest displacement measurement module in the lightweight target dummy of the present invention simulates the deformation of the human chest cavity when it is impacted and compressed. The chest displacement measurement module adopts a combination of multiple structural parts, which can simulate the visceral stiffness of different groups of people (such as men, women, the elderly, etc.), which is more in line with the dummy design concept, and the chest displacement can be observed more intuitively, so that the damage of weapons to the human body can be simulated more realistically, and more data support can be provided for the design of safer and more effective protective devices. In addition, the use of live animal viscera can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 is a three-dimensional schematic diagram of a lightweight target dummy of this embodiment;

[0024] Attached Figure 2 is a three-dimensional schematic diagram of the chest cavity assembly of this embodiment (partial structural perspective diagram);

[0025] Attached Figure 3 is a three-dimensional schematic diagram of the pelvic assembly of this embodiment;

[0026] Attached Figure 4is a three-dimensional schematic diagram of the upper limb assembly of this embodiment;

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

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

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

[0030] Attached Figure 8 Schematic cross-sectional view of the chest displacement measurement module of this embodiment (a first defect guiding groove is provided on the first inner tube);

[0031] Attached Fig. 9 Schematic cross-sectional view of the chest displacement measurement module of this embodiment (a second defect guiding groove is provided on the second inner tube);

[0032] Attached Fig.10 This is a schematic diagram of the deformation of the chest displacement measurement module of this embodiment (Example 1);

[0033] Attached Fig.11 This is a schematic diagram of the deformation of the chest displacement measurement module of this embodiment (Example 2);

[0034] Attached Fig.12 FIG. 3 is a schematic diagram of the deformation of the chest displacement measurement module of this embodiment (Example 3).

[0035] Among them: 1. Thoracic assembly; 111. Thoracic vertebrae side plate; 112. Thoracic vertebrae front plate; 113. Thoracic vertebrae back plate; 121. Rib fixing 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 fixed part; 312. First rotating 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 fixed part; 412. Second rotating part; 42. Thigh; 421. Thigh body; 422. Thigh substitute; 43. Knee joint; 431. Upper knee joint; 432. Lower knee joint; 44. Calf; 441. Calf body; 442. Calf substitute; 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. Middle tube; 551. Fourth flange. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] In the following description, the directions involved, such as "front", "back", "left", "right", "up", and "down", are all based on the human body. The direction of the human face is "front", the direction of the back is "back", the direction of the top of the head is "up", the direction of the feet is "down", and the left and right sides of the body are "left" and "right" respectively. The definitions of the above directions are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

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

[0039] like Figure 1 and Figure 2 As shown, the thoracic cavity component 1 includes a thoracic vertebrae and rib components.

[0040] In this embodiment, if Figure 2 As shown, the thoracic spine includes a thoracic side plate 111, a thoracic front plate 112 and a thoracic back plate 113. The thoracic side plates 111 are respectively arranged on the left and right sides, the thoracic front plate 112 and the thoracic back plate 113 are both connected between the thoracic side plates 111 on the left and right sides, and the thoracic front plate 112 is located in front of the thoracic back plate 113.

[0041] The rib assembly is arranged on the thoracic vertebrae. Figure 2 As shown, the rib assembly includes a rib fixing plate 121 and ribs. The rib fixing plate 121 is arranged in front of the thoracic vertebrae. The ribs are respectively arranged on the left and right sides of the rib fixing plate 121. The ribs on both sides are symmetrically arranged, and multiple ribs are arranged at intervals along the up and down directions. The front part of the ribs on each side is fixed on the rib fixing plate 121, and the rear part of the ribs on each side is fixed on the thoracic vertebrae rear plate 113.

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

[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 is a U-shaped structure. The rib damper 123 is arranged on the inner side of the rib body 122 and extends along the length direction of the rib body 122. The pressure sensor is used to measure the impact load borne by the thorax assembly during the test.

[0044] The rib damper 123 is made of polymer material, and specifically can be made of the material disclosed in patent document ZL2021116004021. The rib damper 123 is made of polymer material to reduce the weight of the dummy and can simulate the physical signs of the Chinese body for testing.

[0045] In this embodiment, the pressure sensor is a diaphragm array pressure sensor, and the pressure sensor 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 gluing.

[0047] The thoracic cavity assembly 1 may further include a counterweight block disposed on the thoracic vertebrae, and the center of gravity position and weight of the dummy may be adjusted by the counterweight block.

[0048] Other sensors and data acquisition modules may also be provided in the chest assembly 1. The sensors are electrically connected to the data acquisition module, and the data acquisition module is electrically connected to a controller provided outside the target dummy, so that the data measured by the sensors are transmitted to the controller through the data acquisition module for processing.

[0049] like Figure 1 and Figure 3 As shown, the pelvic assembly 2 includes a pelvic body 21, and the lower parts of the thoracic vertebrae side plates 111 on the left and right sides are fixedly arranged on the pelvic body 21. The pelvic body 21 is integrally formed by a polymer material, and the polymer material can be polyethylene. The pelvic body 21 is made of a polymer material, and the polymer material has a shear modulus and elastic modulus similar to those of human bones, which can simulate the working conditions of human bones being directly hit by foreign objects or subjected to uniaxial impact loads, resulting in bone fracture and failure.

[0050] like Figure 3 As shown, the pelvic assembly 2 further 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 arranged on the left and right sides of the pelvic body 21.

[0051] like Figure 1 As shown, the upper limb assembly 3 is connected to the left and right sides of the chest assembly 1 respectively. Figure 4 As shown, the upper limb assembly 3 on each side includes a shoulder connecting part 31 , an upper arm 32 , an elbow joint 33 , a lower arm 34 , a wrist joint 35 and a palm supporting part 36 .

[0052] The shoulder connector 31 includes a first fixed portion 311 and a first rotating portion 312, the first fixed portion 311 and the first rotating portion 312 are rotationally connected around a rotating shaft extending in the left-right direction, and the first fixed portion 311 is fixedly connected to the thoracic vertebra side plate 111 on the corresponding side. One end of the upper arm 32 is rotationally connected to the first rotating portion 312 around a rotating shaft extending in the front-back direction, one of the other end of the upper arm 32 and one end of the lower arm 34 is rotationally connected to the elbow joint 33, the other is fixedly connected to the elbow joint 33, and the other end of the lower arm 34 is rotationally connected to the wrist joint 35. In this embodiment, the other end of the upper arm 32 is rotationally 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 rotationally connected to the wrist joint 35.

[0053] Among the components constituting the upper limb assembly 3, a damping structure may be provided between two components that are rotationally connected, thereby limiting the flexibility of rotation between the two components to be consistent with the range of motion of the corresponding parts of the human body.

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

[0055] The leg connecting member 41 includes a second fixing portion 411 and a second rotating portion 412 , the second fixing portion 411 and the second rotating portion 412 are rotatably connected around a rotating shaft extending in the left-right direction, and the second fixing portion 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 , and the upper knee joint 431 and the lower knee joint 432 are rotationally connected.

[0057] One end of the thigh 42 is rotatably connected to the second rotating part 412 around a rotating shaft 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 calf 44 is fixedly connected to the lower knee joint 432, and the other end of the calf 44 is fixedly connected to the ankle joint 45. The foot 46 is rotatably connected to the ankle joint 45.

[0058] The thigh 42 and the calf 44 are both made of polymer materials, and are designed with shear modulus and elastic modulus similar to those of human bones, so as to simulate the working conditions of human bones being directly hit by foreign objects or subjected to uniaxial impact loads, resulting in bone fracture and failure. The polymer material may be polyethylene.

[0059] Among the components constituting the lower limb assembly 4, a damping structure may be provided between two components that are rotatably connected, thereby limiting the flexibility of rotation between the two components to be consistent with the range of motion of the corresponding parts of the human body.

[0060] The thigh 42 and the calf 44 can be designed as a split structure, and part of the structure of the thigh 42 and the calf 44 can be replaced with a force sensor, so that the force applied to the thigh 42 and the calf 44 during the test can be tested. Figure 5 As shown, the thigh 42 includes a thigh body 421 and a thigh substitute 422 fixedly connected to the thigh body 421, and the thigh substitute 422 can be replaced by a force sensor. The calf 44 includes a calf body 441 and a calf substitute 442 fixedly connected to the calf body 441, and the calf substitute 442 can be replaced by a force sensor.

[0061] The dummy further comprises a chest displacement measuring module 5, which is arranged in the chest cavity component 1 and is used to simulate the deformation of the human chest cavity when it is impacted and compressed.

[0062] In order to simulate and visually observe the deformation of the chest viscera of the dummy after the chest cavity is impacted, the chest displacement measurement module 5 adopts a combination of multiple structural parts. Its overall structure consists of two parts, the front and the back. The back half is mainly installed and fixed on the thoracic spine, and the front half is deformed by collision. The chest displacement measurement module 5 is designed as a combination of multiple structures and multiple stiffnesses. It can simulate the stiffness of the internal organs of different groups of people, such as men, women, and the elderly, so that it is more in line with the design concept of the dummy. In addition, compared with traditional sensors, the chest displacement can be observed more intuitively, and the use of live animal viscera can be avoided.

[0063] In this embodiment, the chest displacement measurement module 5 is composed of circular tubes with different rigidity, and is divided into a two-section structure of a deformation section and a transition section. Figure 6 to Figure 9 As shown, the chest displacement measurement module 5 includes a first tube assembly and a second tube assembly arranged behind the first tube assembly, and the first tube assembly and the second tube assembly are coaxially arranged.

[0064] like Figure 7 to Figure 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 . 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 Figure 7 to Figure 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 on the outside of 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 fixedly arranged on the posterior plate 113 of the thoracic vertebra.

[0066] like Figure 7 to Figure 9 As shown, the first inner tube 51 partially extends backward into the second inner tube 53, and there is a gap between the outer wall of the first inner tube 51 and the inner wall of the second inner tube 53. The first inner tube 51 is provided with a positioning portion 511 protruding outward from the outer circumference of the first inner tube 51, and the positioning portion 511 is arranged against the inner wall of the second inner tube 53. This arrangement can offset 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 Figure 6 to Figure 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 connected to the rear end of the first outer tube 52 by welding.

[0068] like Figure 6 to Figure 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 connected to the front end of the second outer tube 54 by welding.

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

[0070] like Figure 7 to Figure 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 connected to the front end of the second inner tube 53 by welding.

[0071] like Figure 7 to Figure 9 As shown, the first pipe assembly further includes an intermediate pipe 55, which is located at the rear end of the first pipe assembly and is disposed in the gap between the first inner pipe 51 and the first outer pipe 52. A fourth flange 551 is disposed at the rear end of the intermediate pipe 55. In this embodiment, the fourth flange 551 is connected to the rear end of the intermediate pipe 55 by welding.

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

[0073] The second flange 541 is connected to the third flange 531 with adjustable connection strength; the first inner tube 51 is connected to the middle tube 55 with adjustable connection strength.

[0074] In this embodiment, the second flange 541 is connected to the third flange 531 by welding, and the connection strength between the second flange 541 and the third flange 531 is changed by changing the number of welding points between the second flange 541 and the third flange 531. The first inner tube 51 is connected to the middle tube 55 by welding, and the connection strength between the first inner tube 51 and the middle tube 55 is changed by changing the number of welding points between the first inner tube 51 and the middle tube 55.

[0075] The stiffness range of the chest displacement measurement module 5 can be adjusted by changing the connection strength between the second flange 541 and the third flange 531 and the connection strength between the first inner tube 51 and the middle tube 55. The present invention provides the following combinations.

[0076] Example 1

[0077] In this embodiment, the second flange 541 and the third flange 531 are normally welded, and the first inner tube 51 and the middle tube 55 are normally welded. In this way, when the first outer tube 52 and the first inner tube 51 are deformed by the impact load, Fig.10 shown.

[0078] In this embodiment, a plurality of first defect guiding grooves 512 may be provided at intervals along the length direction of the rear portion of the first inner tube 51, and each first defect guiding groove 512 is located in front of the intermediate tube 55. Figure 8 The first defect guiding groove 512 can separate the deformation areas of the first outer tube 52 and the first inner tube 51, prevent the deformation of the first outer tube 52 and the first inner tube 51 from accumulating and affecting the result, and only allow the first outer tube 52 and the first inner tube 51 to displace in the axial direction, and neither displacement nor deflection occurs in other directions.

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

[0080] Assuming that the mass of the impact 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, the initial energy of the deformed component in the chest displacement measurement module 5 before the impact is:

[0081]

[0082] According to the overall energy distribution relationship, assuming that the energy absorption ratio of the deformation zone is k, the deformation space of the deformation zone is L, and the stiffness of the deformation zone is 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 is obtained z The formula is:

[0085]

[0086] In the above formula (2) and formula (3), x1, x2, etc. represent the parts that are deformed, 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 middle tube 55 are normally welded together, and the welded connection between the second flange 541 and the third flange 531 is weakened. In this way, when subjected to an impact load, the welded connection between the second flange 541 and the third flange 531 fails immediately, and the first inner tube 51 drives the second inner tube 53 to move, so that the first outer tube 52 and the second inner tube 53 are deformed simultaneously during the deformation process. Fig.11 shown.

[0089] A plurality of second defect guide grooves 532 may be provided at intervals along the length direction of the front portion of the second inner tube 53, and each second defect guide groove 532 is located behind the positioning portion 512. In this way, when subjected to an impact load, the second inner tube 53 can be smoothly compressed in 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, and the welding connection between the first inner tube 51 and the middle tube 55 is weakened.

[0093] Thus, when subjected to an impact load, the welded connection between the first inner tube 51 and the middle tube 55 fails immediately. During the deformation process, the first inner tube 51 slides into the second inner tube 53, causing the first outer tube 52 to deform alone. Fig.12 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-mentioned 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, and the material parameters are: density ρ=2.7×10-6kg·mm-3, elastic modulus E=83GPa, Poisson's ratio μ=0.3, and yield strength σb=276MPa. Aluminum alloy has the advantages of high energy absorption ratio, light weight, stable deformation, simple structure, and easy combination.

[0096] The first outer tube 52 has a stiffness of E1, the first inner tube 51 has a stiffness of E2, the second inner tube 53 has a stiffness of E3, and the second outer tube 54 has a stiffness of E4, where E1<E3<E2<E4. The second outer tube 54, as a supporting part, has the largest stiffness and does not deform. The combined deformation caused by the welding failure position is mainly determined. The overall structural stiffness is changed by changing the welding failure position, as follows:

[0097] a) In the modified combination of Example 1, when the welding connection between the second flange 541 and the third flange 531 and the welding connection between the first inner tube 51 and the middle tube 55 do not fail, the first outer tube 52 and the first inner tube 51 of the chest displacement measurement module 5 are crushed at the same time 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 welding connection between the first inner tube 51 and the middle tube 55 does not fail and the welding connection between the second flange 541 and the third flange 531 fails, the first outer tube 52 and the second inner tube 53 of the chest displacement measurement module 5 are simultaneously crushed during the impact process, and the structural stiffness is the intermediate stiffness E1+E3.

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

[0100] The normal welding connection mentioned in the above embodiments refers to a circle of eight welding points, and the weakened welding connection refers to reducing the number of welding points, that is, using four welding points and performing weakening treatments such as grinding and cutting on the welding points.

[0101] The target dummy can also wrap skin around the chest 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 Shaw's It has good wear resistance and tear resistance, which can simulate the impact load transmission path and dissipation form similar to the human body.

[0102] The external dimensions of the target dummy meet the 50th percentile human body dimension specifications in the GB / T 10000-1988 "Human Body Dimensions of Chinese Adults" standard.

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

[0104] The target dummy is mounted on a standing fixed platform and placed in a weapon damage test environment. When the dummy is hit, the sensors of the chest and limbs will record the data generated by the impact, and the data will be read by the data acquisition module. After the test, the dummy structure is disassembled to observe whether the internal organs are damaged by the impact, and the damage to the internal organs of the human body caused by the weapon impact is evaluated by measuring the deformation of the deformation components in the chest displacement measurement module 5.

[0105] Of course, the target dummy can also be installed on a sitting fixed table for testing.

[0106] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightweight target dummy, characterized in that: It comprises a chest cavity component and a chest displacement measurement module arranged in the chest cavity component for simulating the deformation of the human chest cavity when it is impacted and compressed; The chest displacement measurement module includes a first tube assembly and a second tube assembly arranged 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, and the rear portion of the second tube assembly is fixedly arranged at the rear portion of the chest cavity assembly; A first flange is disposed at the rear end of the first outer tube, a second flange is disposed at the front end of the second outer tube, and the first flange is fixedly connected to the second flange; 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 arranged between the first inner pipe and the first outer pipe, and the rear end of the intermediate pipe is provided with a fourth flange; 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 middle tube with adjustable connection strength.

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

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

4. The lightweight target dummy according to claim 1, characterized in that: A plurality of first defect guide grooves are arranged at intervals along the length direction 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.

5. The lightweight target dummy according to claim 1, characterized in that: The first inner tube partially extends backward 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 portion protruding outward from the outer circumferential surface of the first inner tube, and the positioning portion is abutted against the inner wall of the second inner tube.

6. The lightweight target dummy according to claim 5, characterized in that: A plurality of second defect guide grooves are arranged at intervals along the length direction of the front portion of the second inner tube, and each of the second defect guide grooves is located behind the positioning portion.

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 a thoracic vertebra and a rib assembly arranged on the thoracic vertebra, the rib assembly includes a rib fixing plate and ribs respectively arranged on the left and right sides of the rib fixing plate, the ribs on both sides are symmetrically arranged, both are U-shaped structures, and multiple ribs are arranged at intervals along the up and down directions, the front part of the ribs on each side is fixedly arranged on the rib fixing plate, and the rear part of the ribs on each side is fixedly arranged on the rear part of the thoracic vertebra; The rib comprises a rib body, a rib damper arranged on the inner side of the rib body and a pressure sensor. The rib damper extends along the length direction of the rib body. The rib damper is made of 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 further comprises a pelvic assembly connected to the thoracic assembly, the pelvic assembly comprising a pelvic body and a fifth flange arranged at the lower part of the pelvic body and connected to the lower limb assembly, and the pelvic body is integrally formed by polymer materials.

10. The lightweight target dummy according to claim 1, characterized in that: The dummy further comprises an upper limb assembly connected to the chest assembly, the upper limb assembly being connected to the left and right sides of the chest assembly, and the upper limb assembly on each side comprises a shoulder connecting piece, an upper arm, an elbow joint, a lower arm, a wrist joint and a palm supporting piece; the shoulder connecting piece is fixedly connected to the chest assembly; one end of the upper arm is rotatably connected to the shoulder connecting piece, one of the other end of the upper arm and one end of the lower arm is rotatably connected to the elbow joint, the other is fixedly connected to the elbow joint, and the other end of the lower arm is rotatably connected to the wrist joint; the palm supporting piece is rotatably connected to the wrist joint; The dummy also includes a pelvic assembly connected to the thoracic assembly and a lower limb assembly connected to the pelvic assembly, the lower limb assembly is connected to the left and right sides of the pelvic assembly, and the lower limb assembly on each side includes a leg connecting piece, a thigh, a knee joint, a calf, an ankle joint and a foot; the leg connecting piece 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 connecting piece, 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; the thigh and the calf are both made of polymer materials.

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