Post-protection blunt strike test system based on bionic human trunk target

Abstract

The invention discloses a post-protection blunt strike test system based on a bionic human trunk target. The post-protection blunt strike test system comprises a fiber bragg grating demodulator, a charge amplifier, a data collector, an upper computer, an acceleration sensor, an optical fiber sensor, a plurality of pressure sensors, a bionic skeleton, bionic muscles, a bionic heart, a bionic liver and bionic lungs. The acceleration sensor is adhered to the sternum of the bionic skeleton, the optical fiber sensor is adhered to the rib of the bionic skeleton, and the plurality of pressure sensors are respectively adhered to the front surfaces of the bionic heart, the bionic lung and the bionic liver; the pressure sensor, the acceleration sensor and the optical fiber sensor are arranged on the bionic human trunk target, the charge amplifier is connected with the pressure sensor and the acceleration sensor, the fiber bragg grating demodulator is connected with the optical fiber sensor, the data collector is connected with the charge amplifier, and the upper computer is connected with the fiber bragg grating demodulator and the data collector. The method can provide a basis for personnel injury assessment.

Description

Technical Field

[0001] The invention belongs to the field of personnel injury assessment, and in particular is a post-protection blunt impact test system based on a bionic human torso target. Background Art

[0002] The lethal effect of bullets and fragments on personnel and the protective effect of bulletproof vests on personnel are the key factors to be considered in the design of weapons and equipment. Research on the blunt impact effect and influencing factors of bullets or fragments on the human body can provide important reference for the design of light weapons and the optimization of human protective equipment.

[0003] At present, the targets used by the institute mainly include biological targets, non-biological targets and finite element targets. Non-biological targets use simulants similar to the physical response of human tissue to replace the human body, such as ballistic gelatin, clay, 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's geometry and material mechanical properties, and the basic data required for its optimization and verification comes from experiments. The application of these targets is greatly limited and they are not ideal ballistic test targets.

[0004] Among the existing human targets, most use gelatin as the main material, which cannot be preserved for a long time. In addition, there are human targets using transparent gel, which do not have internal organs and sensors placed on them, and their applications are limited. Summary of the invention

[0005] The purpose of the present invention is to provide a post-protection blunt impact test system based on a bionic human torso target, which is used for bullet blunt impact tests and can effectively collect pressure data on the surface of internal organs, acceleration data at the sternum, and deformation data of ribs when the human body is bluntly hit. SEBS gel and silica gel are used for long-term storage.

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

[0007] A post-protection blunt impact test system based on a bionic human torso target, comprising: a bionic human torso target, a fiber grating demodulator, a charge amplifier, a data acquisition device and a host computer;

[0008] The bionic human torso target has a bionic structure and a sensor assembly; the sensor assembly includes an acceleration sensor, an optical 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 optical fiber sensor is glued on the ribs of the bionic skeleton, and a plurality of pressure sensors are glued and arranged on the front surfaces of the bionic heart, bionic lungs and bionic liver respectively;

[0010] The pressure sensor, acceleration sensor and optical fiber sensor are arranged on the bionic human torso target, the charge amplifier is electrically connected to the pressure sensor and to the acceleration sensor, the optical fiber Bragg grating demodulator is optically connected to the optical fiber sensor, the data collector is electrically connected to the charge amplifier, and the host computer is electrically connected to the optical fiber Bragg grating demodulator and the data collector.

[0011] Compared with the prior art, the present invention has the following significant advantages:

[0012] (1) The present invention provides a bionic human torso target, which has bones and internal organs, has a high similarity to the human body, and can improve the credibility of test data. The target is arranged with a pressure sensor, an optical fiber sensor and an acceleration sensor, and can be stored for a long time.

[0013] (2) The present invention provides a post-protection blunt impact test system based on a bionic human torso target, which can visualize the entire test data and can be used in various occasions such as scientific research and experiments.

[0014] (3) The present invention can test the lethal effects of bullets and fragments on personnel, and the protective effects of bulletproof vests on personnel, and can comprehensively collect the impact on the internal organs of personnel when they are hit by blunt force, providing a basis for personnel injury assessment. It provides conditions for performance testing of protective equipment and provides a scientific basis for improving the lethal power of bullets and improving the performance of protective equipment. It promotes the study of 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 experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The schematic diagram of the post-protection blunt impact test system based on the bionic human torso target;

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

[0017] Figure 3 A schematic diagram of the arrangement of the optical fiber sensor and the acceleration sensor on the skeleton;

[0018] Figure 4 It is a side view of the skeleton and a side view of the acceleration sensor arrangement position;

[0019] Figure 5 The quasi-static engineering stress-strain curve of 15% SEBS gel and pig muscle tissue;

[0020] Figure 6 It is a quasi-static engineering stress-strain curve diagram of organ-mimicking (heart, liver, lung) silicone and biological internal organs. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Combination Figure 1 The present embodiment provides a post-defense blunt impact test system based on a bionic human torso target, comprising: a bionic human torso target, pressure sensors 2-5, an acceleration sensor 6, an optical fiber sensor 1, an optical fiber Bragg grating demodulator 13, a charge amplifier 14, a data acquisition device 15 and a host computer 16.

[0023] The bionic human torso target has a bionic structure and a sensor component; the sensor component is arranged in the target and is used to collect test data.

[0024] The sensor assembly includes an acceleration sensor 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, bionic left lung 19);

[0025] Combination Figure 2-Figure 4 The acceleration sensor 6 is arranged behind the sternum of the bionic skeleton by gluing, the optical fiber sensor 1 is pasted on the ribs of the bionic skeleton, and the pressure sensors 2-5 are pasted and arranged on the front surfaces of the bionic heart, bionic lungs and bionic liver respectively.

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

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

[0028] The bionic skeleton is a PVC skeleton, which comes from a medical teaching aid product.

[0029] The bionic muscle is SEBS gel.

[0030] The bionic muscle tissue mimetic adopts styrene-ethylene-butylene-styrene Styrene EthyleneButylene Styrene, SEBS gel, which is mainly synthesized through SEBS powder and white mineral oil. SEBS powder and white mineral oil are both commercial products.

[0031] The synthesis method is as follows: 1. Weigh SEBS powder and white mineral oil according to the mass fraction of the gel to be made. Taking 15% mass fraction as an example, when preparing 100g of SEBS gel, weigh 15g of SEBS powder and 85g of white mineral oil. 2. After preheating the white mineral oil, 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 to form a transparent solution. 5. Take out the solution and cool it to room temperature to obtain SEBS gel. By measuring the quasi-static mechanical properties of SEBS gel with a mass fraction of 15%, it is found that it has a high similarity with real muscle tissue, such as Figure 5 .

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

[0033] The silica gel is a condensed industrial silica gel, which is mainly divided into silica gel colloid, curing agent and silicone oil. The silica gel can be solidified by adding a certain proportion of curing agent to the silica gel. The hardness of the silica gel can be adjusted by silicone oil, thereby simulating different internal organs. Quasi-static mechanical tests were carried out on multiple proportions, and three material proportions that are closest to the mechanical properties of internal organs were obtained, such as Figure 6 The silicone ratio is based on the mass ratio of colloid: silicone oil: curing agent. The ratio of bionic lung is 19:76:5. The ratio of bionic liver is 8:5:2. The ratio of bionic heart is 55:36:9.

[0034] The bionic heart, bionic lung and bionic liver are prepared as follows: 1. prepare a silicone mold, 2. mix silicone colloid, silicone oil and curing agent in proportion, 3. inject into the mold, 4. wait for curing and then demould.

[0035] The method for making the bionic human trunk target is as follows: 1. Use strong glue to stick the acceleration sensor to the inside of the sternum and the optical fiber sensor to the ribs. 2. Hang the skeleton in the stainless steel mold (bionic muscle tissue mold). 3. Hang the heart, lung and liver integrated aluminum model in the skeleton. 4. Prepare SEBS gel (bionic muscle tissue). 5. Pour for the first time until the SEBS gel submerges half of the heart, lung and liver integrated aluminum model. 6. After the SEBS gel cools down, take out the heart, lung and liver integrated aluminum model to form a pit. 7. According to the actual test requirements, paste the PVDF pressure sensor on the front surface of the silicone heart, lung and liver model respectively. 8. Put the silicone heart, lung and liver model into the pit left by the aluminum model. 9. Pour the SEBS gel for the second time until the entire bionic organ is submerged. 9. After the SEBS gel cools down, pour for the third time until the entire skeleton is submerged. The whole process is not limited to three pourings, and the number of times can be increased as needed. 10. Demolding after cooling.

Claims

1. A post-protection blunt impact test system based on a bionic human torso target, characterized in that: include: Bionic human torso target, fiber Bragg grating demodulator, charge amplifier, data acquisition device and host computer; The bionic human torso target has a bionic structure and a sensor assembly; the sensor assembly includes an acceleration sensor, an optical 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; The acceleration sensor is glued behind the sternum of the bionic skeleton, the optical fiber sensor is glued on the ribs of the bionic skeleton, and a plurality of pressure sensors are glued and arranged on the front surfaces of the bionic heart, bionic lungs and bionic liver respectively; The pressure sensor, acceleration sensor and optical fiber sensor are arranged on the bionic human torso target, the charge amplifier is electrically connected to the pressure sensor and to the acceleration sensor, the optical fiber Bragg grating demodulator is optically connected to the optical fiber sensor, the data collector is electrically connected to the charge amplifier, and the host computer is electrically connected to the optical fiber Bragg grating demodulator and the data collector.

2. The post-protection blunt impact test system based on the bionic human torso target according to claim 1 is characterized in that: The method for making the bionic human trunk target is as follows: pasting an acceleration sensor on the inner side of the sternum and pasting an optical fiber sensor on the ribs; hanging a skeleton in a bionic muscle tissue mold; hanging a heart-lung-liver integrated model in the skeleton; preparing SEBS gel; pouring for the first time until the SEBS gel submerges half of the heart-lung-liver integrated model; after the SEBS gel cools down, taking out the heart-lung-liver integrated model to form a pit; pasting PVDF pressure sensors on the front surfaces of the bionic heart, bionic liver and bionic lungs respectively; putting the bionic heart, bionic liver and bionic lungs into the pits left by the heart-lung-liver integrated aluminum; pouring the SEBS gel for the second time until the entire bionic organ is submerged; after the SEBS gel cools down, pouring again until the entire skeleton is submerged; and demolding after cooling.

3. The post-protection blunt impact test system based on the bionic human torso target according to claim 1 or 2, characterized in that: The bionic muscle is SEBS gel, and the synthesis method is as follows: Weigh SEBS powder and white mineral oil according to the mass fraction of the gel to be produced, with the mass ratio of SEBS powder to white mineral oil being 15:85; after preheating the white mineral oil, pour the SEBS powder into it and stir to mix; place the mixture in an environment of 130° C. to 150° C. and let it stand; wait for the SEBS powder to completely melt to form a transparent solution; take out the solution and cool it to room temperature to obtain a SEBS gel.

4. The post-protection blunt impact test system based on the bionic human torso target according to claim 1 or 2, characterized in that: The bionic heart, bionic lung and bionic liver are made of silica gel prepared in different proportions, and the mass ratios of colloid: silicone oil: curing agent are 55:36:9, 19:76:5 and 8:5:2 respectively.

5. The post-protection blunt impact test system based on the bionic human torso target according to claim 4 is characterized in that: The bionic heart, bionic lung and bionic liver are prepared as follows: Prepare a silicone mold; mix silicone colloid, silicone oil and curing agent in proportion to prepare silicone; inject silicone into the mold; wait for curing and then demould.

6. The post-protection blunt impact test system based on the bionic human torso target according to claim 1 is characterized in that: The charge amplifier is electrically connected to the pressure sensor through a pressure sensor data transmission harness, and is electrically connected to the acceleration sensor through an acceleration sensor data transmission harness.

7. The post-protection blunt impact test system based on the bionic human torso target according to claim 1 is characterized in that: The fiber grating demodulator is optically connected to the fiber optic sensor via a fiber optic sensor data transmission harness.

8. The post-protection blunt impact test system based on the bionic human torso target according to claim 1 or 2, characterized in that: The bionic skeleton is a PVC skeleton.

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