A protective rear blunt impact test system based on a biomimetic human torso target

Abstract

The application discloses a protective rear blunt impact test system based on a bionic human body trunk target, which comprises a fiber grating demodulator, a charge amplifier, a data collector, an upper computer, an acceleration sensor, a fiber sensor, a plurality of pressure sensors, a bionic skeleton, bionic muscles, a bionic heart, a bionic liver and a bionic lung. The acceleration sensor is glued behind the sternum of the bionic skeleton, the fiber sensor is pasted on the rib of the bionic skeleton, and the plurality of pressure sensors are respectively pasted and arranged on the front surfaces of the bionic heart, the bionic lung and the bionic liver. The pressure sensor, the acceleration sensor and the fiber sensor are arranged on the bionic human body trunk target, the charge amplifier is connected with the pressure sensor and the acceleration sensor, the fiber grating demodulator is connected with the fiber sensor, the data collector is connected with the charge amplifier, and the upper computer is connected with the fiber grating demodulator and the data collector. The application can provide a basis for personnel injury assessment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of personnel injury evaluation, in particular to a protection after blunt impact test system based on a bionic human body torso target. BACKGROUND

[0002] The killing effect of bullets and fragments on personnel and the protection effect of body armor on personnel are important factors to be considered in the design of weapon equipment. Studying the blunt impact effect and influencing factors of bullet heads or fragments on the human body can provide important references for the design of light weapons and the optimization of human body protection equipment.

[0003] Currently, the target used in research mainly includes biological targets, non-biological targets and finite element targets. Non-biological targets use analogues similar to the physical response of human tissues to replace the human body, such as ballistic gelatin, putty, soap and other materials to simulate the human body for ballistic tests. The accuracy of finite element target simulation essentially depends on the quality of the model geometry and material mechanics performance, and the basic data required for its optimization and verification come from experiments. The application of these targets is greatly limited, and they are not ideal ballistic test targets.

[0004] Among the existing human body targets, gelatin is mainly used as the main material, which cannot be stored for a long time. In addition, there are transparent gel human body targets, which do not place internal organs and sensors, and their application is limited. SUMMARY

[0005] The purpose of the present application is to provide a protection after blunt impact test system based on a bionic human body torso target, which is used for bullet blunt impact test and can effectively collect the pressure data on the surface of internal organs, the acceleration data at the sternum and the deformation data of the ribs when the human body is subjected to blunt impact. SEBS gel and silica gel are used, which can be stored for a long time.

[0006] The technical solution to achieve the purpose of the present application is:

[0007] A protection after blunt impact test system based on a bionic human body torso target, comprising: a bionic human body torso target, a fiber grating demodulator, a charge amplifier, a data collector and an upper computer;

[0008] The bionic human body torso target has a bionic structure and a sensor assembly; the sensor assembly includes an acceleration sensor, a fiber sensor and a plurality of pressure sensors; the bionic structure includes a bionic skeleton, bionic muscles and bionic organs; the bionic organs include a bionic heart, a bionic liver and a bionic lung;

[0009] The acceleration sensor is glued behind the sternum of the bionic skeleton, the fiber sensor is pasted on the ribs of the bionic skeleton, and the plurality of pressure sensors are respectively pasted and arranged on the front surfaces of the bionic heart, the bionic lung and the bionic liver;

[0010] The pressure sensor, accelerometer, and fiber optic sensor are arranged on the bionic human torso target. The charge amplifier is electrically connected to the pressure sensor and the accelerometer. The fiber optic demodulator is optically connected to the fiber optic sensor. The data acquisition unit is electrically connected to the charge amplifier. The host computer is electrically connected to the fiber optic demodulator and the data acquisition unit.

[0011] The significant advantages of this invention compared to existing technologies are:

[0012] (1) This invention provides a biomimetic human torso target, which has bones and internal organs, has a high degree of human similarity, and can improve the reliability of experimental data. The target is equipped with pressure sensors, fiber optic sensors and acceleration sensors, and can be stored for a long time.

[0013] (2) This invention provides a protective blunt impact testing system based on a bionic human torso target, which can visualize the test data throughout the process and can be used in various occasions such as scientific research and experimentation.

[0014] (3) This invention can test the lethal effects of bullets and shrapnel on personnel, and the protective effects of bulletproof vests on personnel. It can comprehensively collect data on the impact on internal organs when personnel are subjected to blunt force trauma, providing a basis for personnel injury assessment. It provides conditions for performance testing of protective equipment and provides a scientific basis for improving the lethality of bullets and the performance of protective equipment. It promotes research on the injury mechanism of the human body under the action of various lethal elements on the battlefield, which is of great significance to research and experimentation. Attached Figure Description

[0015] Figure 1 A schematic diagram of a protective blunt impact testing system based on a biomimetic human torso target;

[0016] Figure 2 A schematic diagram showing the placement of organs and pressure sensors within the target;

[0017] Figure 3 A schematic diagram showing the arrangement of fiber optic sensors and accelerometers on the frame;

[0018] Figure 4 Side view of the skeleton and side view of the position of the acceleration sensor;

[0019] Figure 5 Quasi-static engineered stress-strain curves of 15% SEBS gel and porcine muscle tissue;

[0020] Figure 6 Quasi-static engineering stress-strain curves of silicone for organ-like structures (heart, liver, lungs) and biological internal organs. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Combination Figure 1 This embodiment of a protective blunt impact testing system based on a bionic human torso target includes: a bionic human torso target, pressure sensors 2-5, an accelerometer 6, an optical fiber sensor 1, a fiber optic demodulator 13, a charge amplifier 14, a data acquisition unit 15, and a host computer 16.

[0023] The biomimetic human torso target has a biomimetic structure and sensor components; the sensor components are arranged inside the target for collecting test data.

[0024] The sensor assembly includes an accelerometer 6, an optical fiber sensor 1, and pressure sensors 2-5; the bionic structure includes a bionic skeleton, bionic muscles, and bionic organs; the bionic organs include a bionic heart 18, a bionic liver 20, and bionic lungs (bionic right lung 17 and bionic left lung 19);

[0025] Combination Figures 2-4 The accelerometer 6 is attached to the sternum of the bionic skeleton by adhesive bonding, the fiber optic sensor 1 is attached to the ribs of the bionic skeleton, and the pressure sensors 2-5 are respectively attached to the anterior surface of the bionic heart, bionic lungs and bionic liver.

[0026] The pressure sensor, accelerometer 6, and fiber optic sensor 1 are arranged on the bionic human torso target. The charge amplifier 14 is electrically connected to the pressure sensors 2-5 through pressure sensor data transmission bundles 8 / 9 / 11 / 12, and electrically connected to the accelerometer 6 through accelerometer data transmission bundle 10. The fiber optic demodulator 13 is optically connected to the fiber optic sensor through fiber optic sensor data transmission bundle 7. The data acquisition unit 15 is electrically connected to the charge amplifier 14. The host computer 16 is electrically connected to the fiber optic demodulator 13 and the data acquisition unit 15.

[0027] The data acquisition device 15 is a high dynamic range multi-channel multi-functional data acquisition device, and the host computer 16 is a PC computer and control software.

[0028] The bionic skeleton is a PVC skeleton derived from medical teaching aids products.

[0029] The biomimetic muscle is made of SEBS gel.

[0030] The biomimetic muscle tissue mimic uses styrene-ethylene-butylene-styrene (SEBS) gel, which is mainly synthesized from SEBS powder and white mineral oil, both of which are commercial products.

[0031] The synthesis method is as follows: 1. Weigh SEBS powder and white mineral oil according to the desired gel mass fraction. Taking a 15% mass fraction as an example, when preparing 100g of SEBS gel, weigh 15g of SEBS powder and 85g of white mineral oil. 2. Preheat the white mineral oil, then pour in the SEBS powder and stir to mix. 3. Place the mixture in an environment of 130℃~150℃ and let it stand. 4. Wait for the SEBS powder to completely melt and form a transparent solution. 5. Remove the solution and cool to room temperature to obtain the SEBS gel. The quasi-static mechanical properties of the 15% mass fraction SEBS gel were measured, showing a high similarity to real muscle tissue, such as... Figure 5 .

[0032] The bionic heart, bionic lungs, and bionic liver are made of silicone in different proportions.

[0033] The silicone is a condensation-type industrial silicone, mainly composed of silicone colloid, curing agent, and silicone oil. Adding a certain proportion of curing agent to the silicone colloid cures the silicone. The hardness of the silicone can be adjusted using silicone oil, thus simulating different internal organs. Quasi-static mechanical tests were conducted on multiple proportions to obtain three material proportions that most closely approximate the mechanical properties of internal organs, such as... Figure 6 The silicone ratios are based on a mass ratio of colloid:silicone oil:curing agent. The bionic lung ratio is 19:76:5. The bionic liver ratio is 8:5:2. The bionic heart ratio is 55:36:9.

[0034] The bionic heart, bionic lungs, and bionic liver are manufactured as follows: 1. Prepare a silicone mold; 2. Mix silicone colloid, silicone oil, and curing agent in proportion to prepare the silicone mixture; 3. Pour the mixture into the mold; 4. Wait for it to cure before demolding.

[0035] The method for fabricating a bionic human torso target is as follows: 1. Use strong adhesive to attach an accelerometer to the inside of the sternum and a fiber optic sensor to the ribs. 2. Suspend the skeleton in a stainless steel mold (bionic muscle tissue mold). 3. Suspend the integrated heart, lung, and liver aluminum model inside the skeleton. 4. Prepare SEBS gel (bionic muscle tissue). 5. Perform the first pour until the SEBS gel submerges half of the integrated heart, lung, and liver aluminum model. 6. After the SEBS gel cools, remove the integrated heart, lung, and liver aluminum model, leaving a depression. 7. According to actual testing requirements, attach PVDF pressure sensors to the front surface of the silicone heart, lung, and liver model. 8. Place the silicone heart, lung, and liver model into the depression left by the aluminum model. 9. Pour the second SEBS gel until the entire bionic organ is submerged. 10. After the SEBS gel cools, perform a third pour until the entire skeleton is submerged. The entire process is not limited to three pours; the number of pours can be increased as needed. 11. Demold after cooling.

Claims

1. A protective back-blast test system based on a biomimetic human torso target, characterized by, The application relates to a bionic human body trunk target, a fiber grating demodulator, a charge amplifier, a data collector and an upper computer. The bionic human body trunk target has a bionic structure and a sensor assembly; the sensor assembly comprises an acceleration sensor, a fiber sensor and a plurality of pressure sensors; the bionic structure comprises a bionic skeleton, bionic muscles and bionic organs; the bionic organs comprise a bionic heart, a bionic liver and a bionic lung. The acceleration sensor is glued behind the sternum of the bionic skeleton, the fiber sensor is pasted on the rib of the bionic skeleton, and the plurality of pressure sensors are respectively pasted on the front surfaces of the bionic heart, the bionic lung and the bionic liver. The pressure sensor, the acceleration sensor and the fiber sensor are arranged on the bionic human body trunk target, the charge amplifier is electrically connected with the pressure sensor and the acceleration sensor, the fiber grating demodulator is optically connected with the fiber sensor, the data collector is electrically connected with the charge amplifier, and the upper computer is electrically connected with the fiber grating demodulator and the data collector. The bionic human body trunk target is prepared by the following method: the acceleration sensor is pasted on the inner side of the sternum, the fiber sensor is pasted on the rib, the skeleton is hung in a bionic muscle tissue mold, an aluminum model of the heart, the lung and the liver is hung in the skeleton, SEBS gel is prepared, first pouring is carried out until the SEBS gel submerges half of the aluminum model of the heart, the lung and the liver, the aluminum model of the heart, the lung and the liver is taken out after the SEBS gel is cooled, forming a pit, PVDF pressure sensors are respectively pasted on the front surfaces of the bionic heart, the bionic liver and the bionic lung, the bionic heart, the bionic liver and the bionic lung are put into the pit left by the aluminum model of the heart, the lung and the liver, the second pouring of the SEBS gel is carried out until the whole bionic organs are submerged, the third pouring of the SEBS gel is carried out until the whole skeleton is submerged after the SEBS gel is cooled, and demolding is carried out after cooling. The bionic muscles are SEBS gel, and the synthesis method is as follows:

2. The bio-mimicking human torso target based protective back-blast test system of claim 1, wherein, According to the mass fraction of the required prepared gel, SEBS powder and white mineral oil are weighed, and the mass ratio of the SEBS powder to the white mineral oil is 15:85; the white mineral oil is preheated, poured into the SEBS powder and stirred and mixed; the mixture is placed in an environment of 130 DEG C to 150 DEG C and is left standing; the SEBS powder is completely melted to form a transparent solution; the solution is taken out and cooled to room temperature to obtain the SEBS gel. The bionic heart, the bionic lung and the bionic liver are silicon gel prepared by different proportions, and the mass ratio of the gel body to the silicone oil to the curing agent is 55:36:9, 19:76:5 and 8:5:2 respectively.

3. The biomimetic human torso target based protective back-blast test system of claim 1, wherein, The bionic heart, the bionic lung and the bionic liver are prepared by the following method:

4. The bio-mimicking human torso target based protective back-blast test system of claim 3, wherein, A silicon gel mold is prepared, silicon gel is prepared by mixing the silicon gel body, the silicone oil and the curing agent in proportion, the silicon gel is injected into the mold, and demolding is carried out after waiting for curing. The charge amplifier is electrically connected with the pressure sensor through a pressure sensor data transmission wire bundle and is electrically connected with the acceleration sensor through an acceleration sensor data transmission wire bundle.

5. The biomimetic human torso target based protective back-blast test system of claim 1, wherein, The fiber grating demodulator is optically connected with the fiber sensor through a fiber sensor data transmission wire bundle.

6. The biomimetic human torso target based protective back-blast test system of claim 1, wherein, The bionic skeleton is a PVC skeleton.

7. The biomimetic human torso target based protective back-blast test system of claim 1, wherein, ​

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