Automobile collision dummy visceral organ biomechanical phantom and preparation method thereof

Abstract

The invention relates to an automobile crash dummy visceral organ biomechanical phantom and a preparation method thereof, the automobile crash dummy visceral organ biomechanical phantom comprises a visceral organ shell and a plurality of phantom units, the visceral organ shell is a cavity in the shape of a human visceral organ, and a plurality of automobile crash dummy visceral organ biomechanical phantom combinations are arranged in the cavity in the shape of the human visceral organ and used for simulating the biomechanical characteristics of the visceral organ; the imitation body unit comprises a silica gel shell and an internal porous silica gel structure, and the internal porous silica gel structure is mounted in the silica gel shell; the internal porous silica gel structure comprises a silica gel pore structure and fluid, and the fluid flows in the silica gel pore structure. According to the invention, not only can the overall biomechanical characteristics of the dummy be accurately reflected, but also the biomechanical characteristics of internal organs can be reflected, and the complex biomechanical response of a human body in a collision experiment can be reproduced.

Description

Technical Field

[0001] The invention belongs to the technical field of human body simulation, in particular to a biomechanical phantom of an automobile collision dummy organ and a preparation method thereof. Background Art

[0002] In the era of rapid development of automobiles, driving comfort and safety have always been important indicators for automobile evaluation. In the process of automobile research and development, a safety assessment device is needed to evaluate the rationality of the protection mechanism of the car for the dummy during driving or in an accident. At present, automobile evaluation at home and abroad uses automobile collision dummies to evaluate the driving comfort and safety of the car.

[0003] In order to ensure that the dummy provides more accurate data parameters in the process of automobile safety assessment, calibration experiments are required on the dummy as a whole or its components before the automobile collision test. The rationality of the dummy meeting the collision test is judged based on the biomechanical response parameters generated in the experiments of each component.

[0004] With the deepening of human biomechanics research and the advancement of automobile collision technology, although collision dummies are constantly improving in simulating the structure and movement of the human body, they still cannot fully reproduce the complex biomechanical responses of the human body. For example, the real behavior of human muscles, soft tissues and organs is difficult to be accurately simulated. More sophisticated human anatomical modeling needs to be carried out, and in-depth research on the anatomical structure of the human body, including bones, muscles, ligaments, internal organs, etc., is needed to establish a more accurate three-dimensional model. Use advanced scanning technology and biomechanical data to more accurately simulate the morphology and physical properties of various parts of the human body. At present, the biomechanical response performance of the joints of the dummy is tested in the experiment. The rationality of the dummy to meet the collision test is tested through the calibration experiment of the whole person or parts. In the experiment, sensors are installed at the joints of the dummy such as the head, neck, and legs to obtain biomechanical response parameters, and the data parameters of the response parts are obtained to judge the rationality of the dummy experiment. The above is the experimental use of the dummy, which can well reflect the biomechanical response parameters of the joints. However, the biomechanical characteristics of human organs have not been taken seriously during automobile collision experiments. That is, in order to accurately reflect the overall biomechanical characteristics of the dummy, the biomechanical characteristics of the internal organs must also be reflected. It is necessary to detect the impact of the external environment on the human organs, obtain the magnitude of the force borne by the organs or the damage status, and use the response data generated by the organs to more clearly demonstrate the safety performance of the car in the experiment. At present, there is a lack of such biomechanical phantoms of automobile collision dummy organs. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to propose a biomechanical phantom of the internal organs of a car crash dummy and a preparation method thereof, which can accurately reflect the overall biomechanical characteristics of the dummy, as well as the biomechanical characteristics of the internal organs, and reproduce the complex biomechanical response of the human body in a crash experiment.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] The automobile collision dummy organ biomechanical phantom comprises an organ shell and multiple phantom units, wherein the organ shell is a cavity in the shape of a human organ, and multiple automobile collision dummy organ biomechanical phantoms are combined and loaded into the cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ.

[0008] Moreover, the phantom unit includes a silicone shell and an internal porous silicone structure, wherein the internal porous silicone structure is installed in the silicone shell, the silicone shell is used to wrap the porous silicone structure to form a whole, and the internal porous silicone structure is used to simulate the external structure and mechanical properties of human internal organs.

[0009] Moreover, the silicone shell is a closed structure, and the thickness of the silicone shell is 1-5 mm.

[0010] Moreover, the internal porous silicone structure includes a silicone pore structure and a fluid. The fluid flows inside the silicone pore structure. The silicone pore structure is used to ensure the shape of the organ, and the fluid is used to fill the silicone pores and simulate the mechanical properties of the organ together with the porous structure.

[0011] Moreover, the silica gel pore structure is a polyhedral structure, and the pore structure orientation and porosity of the silica gel pore structure are adjusted according to the simulated organ.

[0012] Furthermore, the quality and type of the fluid are adjusted according to the simulated organ.

[0013] Furthermore, the types of fluid include liquid metal, water, alcohol and oil.

[0014] A method for preparing a biomechanical phantom of an automobile collision dummy organ, characterized in that it comprises the following steps:

[0015] Step 1: Select the organ to be simulated and obtain the elastic modulus and Poisson's ratio parameters of the organ in three orthogonal directions;

[0016] Step 2: Based on the isotropic elastic modulus and Poisson's ratio parameters of the organ, a finite element simulation method is used to achieve the same mechanical properties of the phantom unit as the organ by adding fluid, and the phantom unit is printed using 3D printing;

[0017] Step 3: Assemble a plurality of automobile collision dummy organ biomechanical phantoms and place them into a cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ.

[0018] The advantages and positive effects of the present invention are:

[0019] The invention comprises an organ shell and a plurality of phantom units, wherein the organ shell is a cavity in the shape of a human organ, and a plurality of automobile collision dummy organ biomechanical phantoms are assembled and loaded into the cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ; the phantom unit comprises a silicone shell and an internal porous silicone structure, wherein the internal porous silicone structure is installed in the silicone shell; the internal porous silicone structure comprises a silicone pore structure and a fluid, and the fluid flows inside the silicone pore structure. The invention can not only accurately reflect the overall biomechanical characteristics of the dummy, but also reflect the biomechanical characteristics of the internal organs, and reproduce the complex biomechanical response of the human body in the collision experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the biomechanical structure of an organ of a car collision dummy according to the present invention;

[0021] Figure 2 It is a schematic diagram of two side structures of the isotropic performance of the biomechanical phantom of the internal organs of the automobile collision dummy of the present invention;

[0022] Figure 3 The schematic diagrams of the two side structures of the anisotropic performance of the biomechanical phantom of the automobile collision dummy organs of the present invention are as follows;

[0023] Figure 4 Schematic diagram of the structure of the biomechanical phantom of the internal organs of the automobile collision dummy of the present invention with different porosities;

[0024] Figure 5 It is a schematic diagram of the structure of the automobile collision dummy organ biomechanical phantom applied to the brain of the present invention;

[0025] Figure 6 This is a schematic diagram of the application of the automobile collision dummy organ biomechanical phantom to the liver structure of the present invention.

[0026] Description of labels:

[0027] 1-Silica gel shell, 2-Silica gel pore structure, 3-Fluid. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings.

[0029] The automobile collision dummy organ biomechanical phantom comprises an organ shell and multiple phantom units, wherein the organ shell is a cavity in the shape of a human organ, and multiple automobile collision dummy organ biomechanical phantoms are combined and loaded into the cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ.

[0030] like Figure 1 As shown, the phantom unit includes a silicone shell and an internal porous silicone structure, wherein the internal porous silicone structure is installed in the silicone shell, the silicone shell is used to wrap the porous silicone structure to form a whole, and the internal porous silicone structure is used to simulate the external structure and mechanical properties of human internal organs.

[0031] Moreover, the silicone shell is a closed structure, and the thickness of the silicone shell is 1-5 mm.

[0032] Moreover, the internal porous silicone structure includes a silicone pore structure and a fluid. The fluid flows inside the silicone pore structure. The silicone pore structure is used to ensure the shape of the organ, and the fluid is used to fill the silicone pores and simulate the mechanical properties of the organ together with the porous structure.

[0033] Moreover, the silica gel pore structure is a polyhedral structure, and the pore structure orientation and porosity of the silica gel pore structure are adjusted according to the simulated organ.

[0034] Furthermore, the quality and type of the fluid are adjusted according to the simulated organ.

[0035] Furthermore, the types of fluid include liquid metal, water, alcohol and oil.

[0036] A method for preparing a biomechanical phantom of an automobile collision dummy organ, characterized in that it comprises the following steps:

[0037] Step 1: Select the organ to be simulated and obtain the XX parameters of the organ;

[0038] Step 2: Based on the isotropic elastic modulus and Poisson's ratio parameters of the organ, a finite element simulation method is used to achieve the same mechanical properties of the phantom unit as the organ by adding fluid, and the phantom unit is printed using 3D printing;

[0039] Step 3: Assemble a plurality of automobile collision dummy organ biomechanical phantoms and place them into a cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ.

[0040] like Figure 2 As shown, there are two side structure schematic diagrams of the isotropic performance of the biomechanical phantom unit of the internal organs of a car collision dummy. This fluid-solid coupling structure is an isotropic material that can be used to simulate the human head and brain, and the mechanical properties in all directions are the same.

[0041] like Figure 3 As shown, there are two side structural schematic diagrams of the anisotropic performance of the biomechanical phantom unit of the automobile collision dummy's organs. The mechanical phantom unit structure is combined to form structures such as the liver and lungs.

[0042] like Figure 4 As shown, a schematic diagram of different porosity structures of the biomechanical phantom unit of the automobile collision dummy's internal organs is shown. The porosity of the porous interior determines the amount of liquid fluid. The change in porosity changes the mass of the biomechanical phantom unit of the automobile collision dummy's internal organs. Different porous structures and liquid fluids can change the center of mass of the biomechanical phantom unit of the automobile collision dummy's internal organs.

[0043] like Figure 5 As shown, it is a schematic diagram of the structure of the biomechanical phantom unit of the internal organs of a car crash dummy applied to the brain. A plurality of biomechanical phantom units of the internal organs of a car crash dummy are combined and loaded into a cavity in the shape of a human brain to simulate the biomechanical characteristics of the brain. Here, the mechanical properties and mass of the phantom units are isotropic, reflecting the biomechanical characteristics of the brain's isotropic mechanical properties and mass.

[0044] like Figure 6 As shown, the biomechanical phantom unit of the car crash dummy's organs is applied to the schematic diagram of the liver structure. The outer volume of the biomechanical phantom unit of the car crash dummy's organs is consistent with the liver shape of the car crash dummy. Different structures are obtained by 3D printing inside, and different fluids are added. The mechanical properties in all directions are the same as those of the liver of the car crash dummy. It is installed in a cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ.

[0045] The invention comprises an organ shell and a plurality of phantom units, wherein the organ shell is a cavity in the shape of a human organ, and a plurality of automobile collision dummy organ biomechanical phantoms are assembled and loaded into the cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ; the phantom unit comprises a silicone shell and an internal porous silicone structure, wherein the internal porous silicone structure is installed in the silicone shell; the internal porous silicone structure comprises a silicone pore structure and a fluid, and the fluid flows inside the silicone pore structure. The invention can not only accurately reflect the overall biomechanical characteristics of the dummy, but also reflect the biomechanical characteristics of the internal organs, and reproduce the complex biomechanical response of the human body in the collision experiment.

[0046] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A biomechanical phantom of the internal organs of a car collision dummy, characterized by: It includes an organ shell and multiple phantom units, wherein the organ shell is a cavity in the shape of a human organ, and multiple automobile collision dummy organ biomechanical phantoms are assembled and loaded into the cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ.

2. The automobile collision dummy organ biomechanical phantom according to claim 1, characterized in that: The phantom unit includes a silicone shell and an internal porous silicone structure, wherein the internal porous silicone structure is installed in the silicone shell, the silicone shell is used to wrap the porous silicone structure to form a whole, and the internal porous silicone structure is used to simulate the external structure and mechanical properties of human internal organs.

3. The automobile collision dummy organ biomechanical phantom according to claim 1, characterized in that: The silicone shell is a closed structure, and the thickness of the silicone shell is 1-5 mm.

4. The automobile collision dummy organ biomechanical phantom according to claim 1, characterized in that: The internal porous silicone structure includes a silicone pore structure and a fluid. The fluid flows inside the silicone pore structure. The silicone pore structure is used to ensure the shape of the organ. The fluid is used to fill the silicone pores and simulate the mechanical properties of the organ together with the porous structure.

5. The automobile collision dummy organ biomechanical phantom according to claim 1, characterized in that: The silica gel pore structure is a polyhedral structure, and the pore structure orientation and porosity of the silica gel pore structure are adjusted according to the simulated organ.

6. The automobile collision dummy organ biomechanical phantom according to claim 4, characterized in that: The quality and type of the fluid are adjusted according to the simulated organ.

7. The automobile collision dummy organ biomechanical phantom according to claim 4, characterized in that: The types of fluids include liquid metals, water, alcohol, and oil.

8. A method for preparing a biomechanical phantom of an automobile collision dummy organ according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Select the organ to be simulated and obtain the elastic modulus and Poisson's ratio parameters of the organ in three orthogonal directions; Step 2: Based on the isotropic elastic modulus and Poisson's ratio parameters of the organ, a finite element simulation method is used to achieve the same mechanical properties of the phantom unit as the organ by adding fluid, and the phantom unit is printed using 3D printing; Step 3: Assemble a plurality of automobile collision dummy organ biomechanical phantoms and place them into a cavity in the shape of a human organ to simulate the biomechanical characteristics of the organ.

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