Human body craniocerebral shock wave injury grade detection device and method

Abstract

The invention discloses a human brain shock wave injury grade detection device and method. The device is composed of a fixing shell, a liquid bag, silicone oil, a connector, a one-way valve, a fixator, a drainage tube and a negative pressure collector, and the fixing shell is a spherical shell and simulates the skull of the human body; a liquid supplementing through hole is formed in the fixed shell and used for supplementing silicone oil in the liquid bag, and a connecting through hole is formed to be connected with the connector; the liquid bag is filled with silicone oil; a one-way valve is mounted on the connector; and the water outlet end of the one-way valve is connected with the drainage tube. The drainage tube penetrates through the fixing through hole in the fixator and is connected with the negative pressure tube in the negative pressure collector. The detection method is based on the effect of shock waves on silicone oil, the one-way valve is opened through shock wave pressure, the shock wave pressure and positive pressure action time are calculated through the mass of silicone oil in different negative pressure pipes, and the level of human craniocerebral injury caused by shock waves is obtained through qualitative analysis. The device does not need to arrange a cable, and is not influenced by electromagnetism and high temperature in an explosion field; the method is simple, fast, visual and reliable.

Description

Technical Field

[0001] The present invention belongs to the field of measurement and detection, and specifically relates to a device and method for detecting the degree of craniocerebral injury caused by shock waves generated by explosions. The present invention is a passive sensor detection device and method for detecting the degree of shock wave injury by utilizing the mass of a viscous liquid simulating cerebrospinal fluid passing through a one-way valve after being acted upon by shock waves. Background Art

[0002] Primary blast injuries are the main cause of casualties in modern wars and terrorist attacks. The brain, as an important part of the human central nervous system, is the main target organ of explosion shock waves. Therefore, accurate detection of the degree of human cranial brain shock wave injury is of great significance for the treatment of the wounded and the development of protective equipment. At present, the detection of primary blast wave injury to the human cranial brain mainly adopts animal experiments, simulated target experiments and other equivalent target experiments. Due to the large differences in cranial brain structure between species or individuals of the same species, high detection costs, unstable results and other reasons, there is a large deviation between the corresponding relationship between animal experimental detection results and human shock wave injury. The simulated target can be close to the human body in size or shape, but the method of using simulated targets to detect the degree of human cranial brain shock wave injury mainly relies on electrical sensors to detect the pressure time history curve at the target, which leads to unstable detection results under complex environments such as electromagnetic interference and signal noise. Other equivalent target methods are to directly evaluate the deformation and damage of various effectors (including beam / plate components) in the explosion field. There are problems such as small deformation and rebound effect in the late explosion, resulting in poor quantitative detection results.

[0003] After the animal experiment, the degree of craniocerebral shock wave injury needs to be detected through clinical observation and imaging examination methods. Clinical observation is influenced by the subjective feelings of the injured, and imaging examination cannot fully reflect the internal damage of the craniocerebral brain, resulting in certain limitations in clinical observation and imaging examination methods. Therefore, how to improve the accuracy and reliability of detection has always been a technical issue that technicians are very concerned about.

[0004] In summary, the existing detection methods have at least the following technical problems:

[0005] 1. The electrical sensors used in existing humanoid targets in harsh environments have problems such as electromagnetic interference, signal noise, and high cost.

[0006] 2. Animal experiments are costly, have long research cycles, and high uncertainty. The applicability of the experimental results in humans is limited, and the repeatability and reliability of the experimental results are poor.

[0007] Cerebrospinal fluid in the brain is a fluid that circulates around the brain and spinal cord. It is essential to maintain the stability of the central nervous system. Cerebrospinal fluid can effectively reflect the changes in the internal environment of the brain under the action of shock waves. In view of the problems existing in animal experimental detection methods, how to design a device to replace cerebrospinal fluid with other fluids with the same density and viscosity as cerebrospinal fluid, which can be fast and accurate while saving costs, and evaluate the damage level of shock waves through the flow of cerebrospinal fluid under the action of shock waves, can solve the technical problems of current detection methods. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a passive detection device and method for the level of human craniocerebral shock wave injury, which can solve the problems of large individual differences, long research cycle, high detection cost, and many interference factors in animal experimental detection methods, and can be used in various complex test environments, with the characteristics of low cost, simple operation, and simple and clear results. The present invention uses the flow of silicone oil simulating cerebrospinal fluid under the action of shock waves to determine the level of human craniocerebral injury caused by shock waves of different intensities and directions.

[0009] The human cranial brain shock wave injury level detection device of the present invention is composed of a fixed shell, a liquid capsule, silicone oil, a connector, three one-way valves, a fixer, three drainage tubes and a negative pressure collector, wherein the fixed shell simulates the human skull, and the fixer is fixedly connected to the negative pressure collector to ensure measurement stability.

[0010] The fixed shell is a spherical shell, and the inner radius of the fixed shell is r 1 , satisfying 50mm≤r 1 ≤90mm, the outer radius of the fixed shell is r 2 , satisfying 2mm≤r 2 -r 1 ≤10mm. The fixed shell is composed of a front fixed shell and a rear fixed shell. The front fixed shell and the rear fixed shell are exactly the same in shape and size, and are both hemispherical shells. The open ends of the front fixed shell and the rear fixed shell are connected by threads. The fixed shell is separated into the front fixed shell and the rear fixed shell to facilitate the placement of the liquid capsule inside the fixed shell 1. A liquid replenishment through hole is opened on the rear fixed shell. The liquid replenishment through hole is used to replenish silicone oil into the liquid capsule. The diameter is d 1 , satisfying 10mm≤d 1 ≤20mm, the axis AA' of the liquid filling hole and the horizontal center line BB' and the vertical center line CC' of the fixed shell are in the same plane, and the angle between AA' and BB' is α 1 , satisfying 45°≤α 1 ≤75°. A connecting through hole is opened at the rear end of the rear fixed housing. The opening direction of the connecting through hole is parallel to the opening section of the left end of the rear fixed housing. The connecting through hole is used to connect the connector. The diameter of the connecting through hole is d 2, meet 50mm≤d 2 ≤80mm, the depth of the connecting hole is l 1 , satisfying l 1 =(d 2 tanθ) / 2. The material of the fixed shell is required not to undergo plastic deformation under the action of the shock wave, and is used to protect the liquid capsule, and the density ρ 1 ≥1.0g / cm 3 , yield strength σ 1 ≥100MPa.

[0011] The liquid capsule is a hollow sphere filled with silicone oil. The liquid capsule is placed in the fixed shell and fixed to the rear fixed shell by adhesive. The outer diameter of the liquid capsule is r 3 , r 3 =r 1 , thickness is t 1 , satisfying 2mm≤t 1 ≤3mm. The liquid capsule is provided with a fluid infusion port, which is coaxial with the fluid infusion through hole, and the outer diameter of the fluid infusion port is d 3 , satisfying d 1 -2mm≤d 3 ≤d 1 -1mm, the infusion port is inserted into the infusion through hole, and the infusion port is in a sealed state during the experiment. After the experiment, silicone oil is replenished through the infusion port without disassembling the device; the rear end of the liquid capsule 2 is opened with a capsule opening, which is circular and has an inner diameter of d 4 , satisfying d 4 =d 2 The sac opening is coaxial with the connecting through hole of the rear fixed shell and is just inside the connecting through hole, so that the connecting through hole of the liquid sac and the fixed shell overlaps into one hole, so that the one-way valve in the connector is in direct contact with the silicone oil. Silicone oil is used to simulate cerebrospinal fluid, and the viscosity coefficient of silicone oil is less than 2000cs.

[0012] The connector is cylindrical in shape and its outer diameter is r. 4 , r 4 =d 2 / 2, the connector length is l 2 , meet 30mm≤l 2 ≤80mm. A boss is set on the outer wall of the connector. The boss is circular with a radius of r 5 , satisfying 5mm≤r 5 -r 4 ≤7mm, boss thickness is t 2 , 2mm≤t 2 ≤3mm, the distance between the front end of the boss and the front end of the connector is l 3 , satisfying l 3 = l 1 +t 1The outer wall of the connector located in front of the boss is tapped with a front connection thread, and the outer wall of the connector located behind the boss is tapped with a rear connection thread. The length of the front connection thread is l 4 , satisfying l 4 = l 3 The front connection thread is inserted into the connection through hole and the pocket opening of the rear fixed housing, so that the connector is connected to the fixed housing. The length of the rear connection thread is l 5 , satisfying l 5 = l 2 -l 4 -t 2 , and then the connecting thread is inserted into the fixing through hole of the fixture, so that the connector is connected to the fixture. The connecting pipe is provided with a mounting through hole, and the mounting through hole diameter is d 5 , 10mm≤d 5 ≤2r 4 / 3. The centers of the three mounting holes are located on a concentric circle on the left end face of the connector, and the radius of the concentric circle is r 6 , satisfying d 5 ≤r 6 ≤2d 5 The angle between the mounting holes is 120°. A connecting hole is provided at the rear end of the connector. The connecting hole is circular and has a diameter of d 6 , satisfying 2r 4 -20mm≤d 6 ≤2r 4 -4mm, the depth of the connection hole is l 6 , satisfying 10mm≤l 6 ≤40mm, the one-way valve is connected to the mounting through hole through the inside of the connecting hole 4-5. The connector 4 is made of the same material as the fixed housing 1.

[0013] The one-way valve is cylindrical in shape. The three one-way valves are respectively installed in the three installation holes of the connecting pipe. The water inlet end of the one-way valve 5 faces the liquid capsule, and the water outlet end is connected to the drainage tube. After the one-way valve is opened, the silicone oil flows into the negative pressure tube through the one-way valve and the drainage tube. The pre-pressure of the one-way valve is ≤235kPa.

[0014] The fixture is a rectangular parallelepiped, and the length of the fixture is l 7 , satisfying 10mm≤l 7 -2r 4 ≤20mm, the width of the fixture is l 8 , meet 5mm≤l 8 -l 5 ≤10mm, the height of the fixture does not affect the experiment, it is only for the convenience of placing the whole device in the experimental site. A fixing through hole is opened in the direction perpendicular to the front end face of the fixture, the center of the fixing through hole is located at the horizontal center of the front end face of the fixture, and the distance between the center of the fixing through hole and the upper end face of the fixture is l 9 , satisfying 10mm≤l9 ≤17mm, fixed through hole diameter is d 7 , satisfying d 7 =2r 4 The fixing through hole is provided with an internal thread, and the fixing device is connected with the fixing device through the thread, and the drainage tube passes through the fixing through hole and is connected with the negative pressure tube in the negative pressure collector. The fixing device is made of the same material as the fixing shell.

[0015] The drainage tube is made of rubber or plastic hose. The front end of the drainage tube passes through the fixed through hole and is connected to the water inlet end of the one-way valve. The rear end of the drainage tube is connected to the negative pressure tube. The length of the drainage tube is greater than l 2 +l 8 +l 11 .

[0016] The negative pressure collector consists of a protective shell, three negative pressure tubes, and foam. The protective shell is a rectangular box with a length of l 10 , 95mm≤l 10 ≤110mm, height of protective shell is l 11 , l 11 = l 10 , the width of the protective shell is l 12 , 50mm≤l 12 ≤l 10 , the thickness of each surface of the protective shell is t 3 , satisfying 5mm≤t 3 ≤10mm, the protective shell is made of transparent material, which is used to observe the flow of silicone oil in the negative pressure tube. A negative pressure tube is placed vertically in the protective shell, and the distance between the top of the negative pressure tube and the lower surface of the top surface of the protective shell is l 13 , 5mm≤l 13 ≤7mm, the distance between the bottom of the negative pressure tube and the upper surface of the bottom surface of the protective shell is l 14 , 5mm≤l 14 ≤7mm, the center line spacing of the negative pressure tube is l 15 , meet 17mm≤l 15 ≤l 10 / 3, the three negative pressure tubes are all conventional blood collection tubes. After the one-way valve is opened, they are used to collect the silicone oil flowing out through the drainage tube. The foam fills the empty space in the negative pressure collector to protect the negative pressure tube.

[0017] The method for detecting the degree of human craniocerebral shock wave injury using the device of the present invention is:

[0018] The first step is to install the human cranial brain shock wave injury level detection device and check:

[0019] 1.1 The infusion port is passed through the infusion through hole, the liquid capsule is connected to the rear fixed shell by adhesive, the front fixed shell and the rear fixed shell are connected by threads, and silicone oil is filled into the liquid capsule through the infusion port;

[0020] 1.2 Install the three one-way valves in the three installation holes of the connecting pipe respectively, with the water inlet end of the one-way valve facing the liquid capsule;

[0021] 1.3 The connector is connected to the fixture through the rear connection thread and the fixing through hole;

[0022] 1.4 Connect the outlet ends of the three one-way valves to the front ends of the three drainage pipes;

[0023] 1.5 Connect the rear ends of the three drainage tubes to the three negative pressure tubes of the negative pressure collector;

[0024] 1.6 Place the assembled human craniocerebral shock wave injury level detection device on the test site through a fixture, with the lower end of the fixture fixed on the ground or a heavier support, and adjust the spatial position of the human craniocerebral shock wave injury level detection device by adjusting the height and position of the fixture.

[0025] The second step is to use the target to detect craniocerebral shock wave injury by:

[0026] 2.1 Detonating explosives;

[0027] 2.2 Under the action of the shock wave, the pressure in the silicone oil is greater than the opening pressure of the one-way valve, the one-way valve opens, and the silicone oil around the connector flows into the negative pressure pipe in the negative pressure collector through the one-way valve and the drainage pipe under the action of the pressure difference;

[0028] 2.3 Let the three one-way valves be the first one-way valve, the second one-way valve and the third one-way valve, and let the pre-pressure for opening the first one-way valve be P a , the pre-pressure for opening the second one-way valve is P b , the pre-pressure for opening the third one-way valve is P c , satisfying P a <P b <P c . Referring to the paper "Development of a rat model for studying blast-induced traumatic brain injury" published by Jingmin Cheng in the journal "Journal of the neurological sciences", it was translated as "Development of a rat model for studying blast-induced traumatic brain injury", and it was determined that P≤100kPa is no injury. Referring to Ward C's paper "Intracranial pressure-a brain injury criterion" in "SAE Transactions", it was translated as "Intracranial pressure-brain injury criterion", and it was determined that P≤173kPa is a minor injury, and 235kPa≤P is a severe injury. Thus, P was determined.a =100kPa, P b =173kPa, P c =235kPa.

[0029] 2.4 After the explosion, remove the negative pressure tube from the negative pressure collector and judge the injury level by observing whether there is silicone oil in the tube and combining with Table 1 "Correspondence between the opening of one-way valves and the degree of craniocerebral injury". If none of the one-way valves are opened, there is no injury or slight injury; if only the first one-way valve is opened, there is slight injury; if the first and second one-way valves are opened, there is moderate injury; if the first, second and third one-way valves are all opened, there is severe injury.

[0030] Table 1 Correspondence between the opening of the one-way valve and the degree of craniocerebral injury

[0031]

[0032] 2.6 After the experiment, the negative pressure tube and the corresponding drainage tube that collected the silicone oil need to be replaced, and the silicone oil should be added to the sac through the fluid insufflation port to continue the test.

[0033] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0034] 1. The detection method of the present invention is based on the effect of shock waves on silicone oil. The one-way valve is opened by the shock wave pressure, and the shock wave pressure and positive pressure action time are estimated by the mass of silicone oil in different negative pressure tubes, so as to qualitatively analyze the level of shock wave-induced craniocerebral injury to the human body. The device of the present invention does not require power supply, does not need to lay cables, and will not be affected by electromagnetic and high temperature in the explosion field. In some workplaces with harsh detection environments, this method is simple, fast, intuitive and reliable;

[0035] 2. The device of the present invention has low cost, simple assembly, and can be used multiple times. During use, it is only necessary to replenish the silicone oil in the device through the liquid filling port of the liquid capsule;

[0036] 3. Compared with traditional animal experimental devices, the biggest advantage of the present invention is that it abandons the complexity and uncertainty of animal experiments. By replacing the animal's skull with a fixed shell for experiments, the number and range of deployment can be greatly increased, more detection data can be obtained, and the reliability, accuracy and stability of the detection of possible damage levels of explosion shock waves can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a general structural diagram of the device for detecting the level of human craniocerebral shock wave injury according to the present invention.

[0038] Figure 2 It is an exploded view of the device for detecting the level of human craniocerebral shock wave injury according to the present invention.

[0039] Figure 3 It is a perspective view of the fixed shell of the device for detecting the level of human craniocerebral shock wave injury of the present invention.

[0040] Figure 4 It is a perspective view of the liquid capsule of the device for detecting the level of human craniocerebral shock wave injury of the present invention.

[0041] Figure 5 It is a three-view diagram of the connector of the device for detecting the level of human craniocerebral shock wave injury according to the present invention. Figure 5 (a) is a front view of the detection device of the present invention, Figure 5 (b) is a side view of the detection device of the present invention, Figure 5 (c) is a top view of the detection device of the present invention.

[0042] Figure 6 It is a three-view drawing of the fixing device of the human craniocerebral shock wave injury level detection device of the present invention. Figure 6 (a) is a front view of the detection device of the present invention, Figure 6 (b) is a side view of the detection device of the present invention, Figure 6 (c) is a top view of the detection device of the present invention.

[0043] Figure 7 It is a three-view diagram of the negative pressure collector of the human craniocerebral shock wave injury level detection device of the present invention. Figure 7 (a) is a front view of the detection device of the present invention, Figure 7 (b) is a side view of the detection device of the present invention, Figure 7 (c) is a top view of the detection device of the present invention.

[0044] Description of reference numerals:

[0045] 1. Fixed shell, 2. Liquid capsule, 3. Silicone oil, 4. Connector, 5. One-way valve, 6. Fixer, 7. Drainage tube, 8. Negative pressure collector, 1-1. Front fixed shell, 1-2. Rear fixed shell, 1-3. Fluid infusion through hole, 1-4. Connecting through hole, 2-1. Fluid infusion port, 2-2. Capsule port, 4-1. Boss, 4-2 Front connecting thread, 4-3 Rear connecting thread, 4-4 Mounting through hole, 4-5 Connecting hole, 6-1. Fixed through hole, 8-1. Protective shell, 8-2. Negative pressure tube, 8-3. Foam DETAILED DESCRIPTION

[0046] like Figure 1 and Figure 2As shown, an embodiment of the device for detecting the level of human craniocerebral shock wave injury of the present invention is composed of a fixed shell 1, a liquid capsule 2, silicone oil 3, a connector 4, three one-way valves 5, a fixture 6, three drainage tubes 7 and a negative pressure collector 8; the fixed shell 1 is a spherical shell that simulates the human skull, and a liquid capsule 2 is fixed in the fixed shell 1, and the liquid capsule 2 is filled with silicone oil 3. The end close to the fixed shell 1 is defined as the front end, and the end close to the negative pressure collector 8 is defined as the rear end. The rear end of the fixed shell 1 is installed with a connector 4, and three one-way valves 5 are installed in the connector 4. The rear end of the connector 4 is connected to the fixture 6. The rear ends of the three one-way valves 5 are respectively connected to the inlets of the three drainage tubes 7, and the outlets of the three drainage tubes 7 are respectively connected to the three negative pressure tubes 8-2 of the negative pressure collector 8.

[0047] like Figure 3 As shown, the fixed shell 1 is a spherical shell, and the inner radius of the fixed shell 1 is r 1 , satisfying 50mm≤r 1 ≤90mm, the outer radius of the fixed shell 1 is r 2 , satisfying 2mm≤r 2 -r 1 ≤10mm. The fixed shell 1 is composed of a front fixed shell 1-1 and a rear fixed shell 1-2. The front fixed shell 1-1 and the rear fixed shell 1-2 are exactly the same in shape and size, and are both hemispherical shells. The open ends of the front fixed shell 1-1 and the rear fixed shell 1-2 are connected by threads. The fixed shell 1 is separated into the front fixed shell 1-1 and the rear fixed shell 1-2 to facilitate the placement of the liquid capsule 2 inside the fixed shell 1. A liquid replenishment through hole 1-3 is opened on the rear fixed shell 1-2. The liquid replenishment through hole 1-3 is used to replenish silicone oil 3 into the liquid capsule 2. The diameter is d 1 , satisfying 10mm≤d 1 ≤20mm, the axis AA' of the liquid replenishing through hole 1-3 and the horizontal center line BB' of the fixed shell 1 and the vertical center line CC' of the fixed shell 1 are in the same plane, and the angle between AA' and BB' is α 1 , satisfying 45°≤α 1 ≤75°. A connecting through hole 1-4 is provided at the rear end of the rear fixed housing 1-2. The opening direction of the connecting through hole 1-4 is parallel to the opening cross section of the left end of the rear fixed housing 1-2. The connecting through hole 1-4 is used to connect the connector 4. The diameter of the connecting through hole 1-4 is d 2 , meet 50mm≤d 2 ≤80mm, the depth of connecting holes 1-4 is l 1 , satisfying l 1 =(d 2 tanθ) / 2. The material of the fixed shell 1 is required not to undergo plastic deformation under the action of the shock wave, and is used to protect the liquid capsule 2, and the density ρ 1 ≥1.0g / cm 3 , yield strength σ1 ≥100MPa.

[0048] like Figure 4 As shown, the liquid capsule 2 is a hollow sphere, filled with silicone oil 3, and the liquid capsule 2 is placed in the fixed shell 1 and fixedly connected to the rear fixed shell 1-2 by adhesive. The outer diameter of the liquid capsule 2 is r 3 , r 3 =r 1 , thickness is t 1 , satisfying 2mm≤t 1 ≤3mm. The liquid capsule 2 is provided with a liquid infusion port 2-2, which is coaxial with the liquid infusion through hole 1-3, and the outer diameter of the liquid infusion port 2-2 is d 3 , satisfying d 1 -2mm≤d 3 ≤d 1 -1mm, the liquid infusion port 2-2 is inserted into the liquid infusion through hole 1-3, and the liquid infusion port 2-2 is in a sealed state when the human craniocerebral shock wave injury level is detected. After the human craniocerebral shock wave injury level is detected, the silicone oil 3 is replenished through the liquid infusion port 2-2 without disassembling the device; the rear end of the liquid capsule 2 is opened with a capsule opening 2-3, the capsule opening 2-3 is circular, and the inner diameter of the capsule opening 2-3 is d 4 , satisfying d 4 =d 2 The capsule opening 2-3 is coaxial with the connecting through hole 1-4 of the rear fixed housing 1 and is exactly located in the connecting through hole 1-4, so that the connecting through hole 1-4 of the liquid capsule 2 and the fixed housing 1 overlap into one hole, so that the one-way valve 5 in the connector 4 is in direct contact with the silicone oil. The silicone oil 3 is used to simulate cerebrospinal fluid, and the viscosity coefficient of the silicone oil 3 is less than 1000cs.

[0049] like Figure 5 As shown, Figure 5 (a) is a front view of the detection device of the present invention, Figure 5 (b) is a side view of the detection device of the present invention, Figure 5 (c) is a top view of the detection device of the present invention. Figure 5 As shown in (a), the connector 4 is cylindrical in shape, and the outer diameter of the connector 4 is r 4 , r 4 =d 4 / 2, the length of connector 4 is l 2 , meet 30mm≤l 2 ≤80mm. Figure 5 As shown in (a), combined Figure 5 (b) A boss 4-1 is provided on the outer wall of the connector 4. The boss 4-1 is circular with a radius of r. 5 , satisfying r 5 >r 4 , preferably, 5mm≤r 5 -r 4≤7mm, the thickness of boss 4-1 is t 2 , 2mm≤t 2 ≤3mm, the distance between the front end surface of the boss 4-1 and the front end surface of the connector 4 is l 3 , satisfying l 3 = l 1 +t 1 The outer wall of the connector 4 located in front of the boss 4-1 is tapped with a front connection thread 4-2, and the outer wall of the connector 4 located behind the boss 4-1 is tapped with a rear connection thread 4-3. The length of the front connection thread 4-2 is l 4 , satisfying l 4 = l 3 The front connecting thread 4-2 is inserted into the connecting through hole 1-4 and the pocket opening 2-3 of the rear fixed housing 1-2, so that the connector 4 is connected to the fixed housing 1-2. The length of the rear connecting thread 4-3 is l 5 , satisfying l 5 = l 2 -l 4 -t 2 , and then the connecting thread 4-3 is inserted into the fixing through hole 6-1 of the fixture 6, so that the connector 4 is connected to the fixture 6. The connector 4 is provided with three mounting through holes 4-4, and the diameter of the mounting through holes 4-4 is d 5 , 10mm≤d 5 ≤2r 4 / 3. The center of the three mounting holes 4-4 is located on a concentric circle on the left end face of the connector 4, and the radius of the concentric circle is r 6 , satisfying d 5 ≤r 6 ≤2d 5 , the angle between the mounting holes 4-4 is 120°. Figure 5 As shown in (c), a connection hole 4-5 is provided at the rear end of the connector 4. The connection hole 4-5 is circular and has a diameter d 6 , satisfying 2r 4 -20mm≤d 6 ≤2r 4 -4mm, the depth of the connecting holes 4-5 is l 6 , satisfying 10mm≤l 6 ≤40mm, three one-way valves 5 are connected to three mounting through holes 4-4 through the inside of the connecting hole 4-5. The connector 4 is made of the same material as the fixed housing 1.

[0050] The one-way valve 5 is cylindrical in shape as a whole. The three one-way valves 5 are respectively installed in the three installation holes 4-1 of the connecting pipe 4. The water inlet end of the one-way valve 5 faces the liquid capsule 2, and the water outlet end is connected to the drainage pipe 7. After the one-way valve 5 is opened, the silicone oil 3 flows into the negative pressure pipe 8-2 through the one-way valve 5 and the drainage pipe 7. The pre-pressure of the one-way valve is ≤235kPa.

[0051] like Figure 6 As shown, the fixture 6 is a rectangular parallelepiped, and the length of the fixture 6 is l 7 , satisfying 10mm≤l 7 -2r 4 ≤20mm, the width of the fixture 6 is l 8 , meet 5mm≤l 8 -l 5 ≤10mm, the height of the fixture 6 does not affect the test, it is only for the convenience of placing the whole device in the test site. A fixing through hole 6-1 is opened in the direction perpendicular to the front end face of the fixture 6, the center of the fixing through hole 6-1 is located at the horizontal center of the front end face of the fixture 6, and the distance between the center of the fixing through hole 6-1 and the upper end face of the fixture 6 is l 9 , satisfying 10mm≤l 9 ≤17mm, the diameter of the fixing hole 6-1 is d 7 , satisfying d 7 =2r 4 The fixing through hole 6-1 is provided with an internal thread, and the connector 4 is connected to the fixing device 6 through the thread, and the drainage tube 7 passes through the fixing through hole 6-1 and is connected to the negative pressure tube 8-2 in the negative pressure collector 8. The fixing device 6 is made of steel material.

[0052] The drainage tube 7 is made of a rubber or plastic hose. The front end of the drainage tube 7 passes through the fixed through hole 6-1 and the water outlet of the one-way valve 5. The rear end of the drainage tube 7 is connected to the negative pressure tube 8-2. The length of the drainage tube 7 is greater than l 2 +l 8 +l 11 .

[0053] like Figure 7 As shown, the negative pressure collector 8 is composed of a protective shell 8-1, three negative pressure tubes 8-2, and foam 8-3. The protective shell 8-1 is a rectangular box with a length of l 10 , 95mm≤l 10 ≤110mm, protective shell 8-1 height is l 11 , l 11 = l 10 , the width of the protective shell 8-1 is l 12 , 50mm≤l 12 ≤l 10 , the thickness of each surface of the protective shell 8-1 is t 3 , satisfying 5mm≤t 3 ≤10mm, the protective shell 8-1 is made of transparent material, which is used to observe the flow of silicone oil 3 in the negative pressure tube 8-2. Three negative pressure tubes 8-2 are placed vertically in the protective shell 8-1, and the distance between the top of the negative pressure tube 8-2 and the lower surface of the top surface of the protective shell 8-1 is l 13 , 5mm≤l 13≤7mm, the distance between the bottom of the negative pressure tube 8-2 and the upper surface of the bottom of the protective shell 8-1 is l 14 , 5mm≤l 14 ≤7mm, the center line spacing of negative pressure pipe 8-2 is l 15 , meet 17mm≤l 15 ≤l 10 / 3, the three negative pressure tubes 8-2 are all conventional blood collection tubes, and the one-way valve 5 is opened to collect the silicone oil 3 flowing out through the drainage tube 7. The foam 8-3 fills the empty space in the negative pressure collector 8 to protect the negative pressure tube 8-2.

[0054] The method for detecting the degree of human craniocerebral shock wave injury using the embodiment of the present invention is:

[0055] The first step is to install the human cranial brain shock wave injury level detection device and check:

[0056] 1.1 The liquid infusion port 2-1 is passed through the liquid infusion through hole 1-3, the liquid capsule 2 is connected to the rear fixed shell 1-2 by adhesive, the front fixed shell 1-1 and the rear fixed shell 1-2 are connected by threads, and silicone oil 3 is filled into the liquid capsule 2 through the liquid infusion port 2-2;

[0057] 1.2 Install the three one-way valves 5 in the three installation holes 4-1 of the connecting pipe 4 respectively, with the water inlet end of the one-way valve 5 facing the liquid capsule;

[0058] 1.3 The connector 4 is connected to the fixture 6 via the rear connection thread 4-3 and the fixing through hole 6-1;

[0059] 1.4 Connect the water outlet ends of the three one-way valves 5 to the front ends of the three drainage pipes 7;

[0060] 1.5 Connect the rear ends of the three drainage tubes 7 to the three negative pressure tubes 8-2 of the negative pressure collector 8;

[0061] 1.6 Place the assembled human craniocerebral shock wave injury level detection device on the test site through a fixture, with the lower end of the fixture fixed on the ground or a heavier support, and adjust the spatial position of the human craniocerebral shock wave injury level detection device by adjusting the height and position of the fixture.

[0062] The second step is to use the target to detect craniocerebral shock wave injury by:

[0063] 2.1 Detonating explosives;

[0064] 2.2 Under the action of the shock wave, the pressure in the silicone oil 3 is greater than the opening pressure of the one-way valve 5, the one-way valve 5 opens, and the silicone oil 3 around the connector 4 flows into the negative pressure pipe 8-2 in the negative pressure collector 8 through the one-way valve 5 and the drainage pipe 7 under the action of the pressure difference;

[0065] 2.3 Let the three one-way valves 5 be the first one-way valve, the second one-way valve and the third one-way valve, and let the pre-pressure for opening the first one-way valve be P a , the pre-pressure for opening the second one-way valve is P b , the pre-pressure for opening the third one-way valve is P c , satisfying P a <P b <P c . Referring to the paper "Development of a rat model for studying blast-induced traumatic brain injury" published by Jingmin Cheng in the journal "Journal of the neurological sciences", it was translated as "Development of a rat model for studying blast-induced traumatic brain injury", and it was determined that P≤100kPa is no injury. Referring to Ward C's paper "Intracranial pressure-a brain injury criterion" in "SAE Transactions", it was translated as "Intracranial pressure-brain injury criterion", and it was determined that P≤173kPa is a minor injury, and 235kPa≤P is a severe injury. Thus, P was determined. a =100kPa, P b =173kPa, P c =235kPa.

[0066] 2.4 After the explosion, the negative pressure tube 8-2 is taken out from the negative pressure collector 8, and the injury level is determined by observing whether there is silicone oil in the tube and combining Table 1 "Correspondence between the opening of the one-way valve and the degree of craniocerebral injury". If none of the one-way valves are opened, there is no injury or slight injury; if only the first one-way valve is opened, there is slight injury; if the first one-way valve and the second one-way valve are opened, there is moderate injury; if the first one-way valve, the second one-way valve and the third one-way valve are all opened, there is severe injury.

[0067] Table 1 Correspondence between the opening of the one-way valve and the degree of craniocerebral injury

[0068]

[0069] 2.5 After the test, the negative pressure tube 8-2 and the corresponding drainage tube 7 that collected the silicone oil 3 are replaced, and the silicone oil 3 is added to the liquid bag 2 through the liquid infusion port 8-2, and the test is continued.

Claims

1. A device for detecting the level of human craniocerebral shock wave injury, characterized in that The device for detecting the level of human cranial brain shock wave injury comprises a fixed shell (1), a liquid capsule (2), silicone oil (3), a connector (4), three one-way valves (5), a fixer (6), three drainage tubes (7) and a negative pressure collector (8); the fixed shell (1) is a spherical shell that simulates a human skull, a liquid capsule (2) is fixed inside the fixed shell (1), and the liquid capsule (2) is filled with silicone oil (3); the end close to the fixed shell (1) is defined as the front end, and the end close to the negative pressure collector (8) is defined as the rear end, a connector (4) is installed at the rear end of the fixed shell (1), three one-way valves (5) are installed in the connector (4), and the rear end of the connector (4) is connected to the fixer (6); the rear ends of the three one-way valves (5) are respectively connected to the inlets of the three drainage tubes (7), and the outlets of the three drainage tubes (7) are respectively connected to the three negative pressure tubes (8-2) of the negative pressure collector (8); The fixed shell (1) is a spherical shell, the inner radius of the fixed shell (1) is r1, and the outer radius of the fixed shell (1) is r2; the fixed shell (1) is composed of a front fixed shell (1-1) and a rear fixed shell (1-2), the front fixed shell (1-1) and the rear fixed shell (1-2) have the same shape and size, and are both hemispherical shells; the open ends of the front fixed shell (1-1) and the rear fixed shell (1-2) are connected by threads; a fluid replenishment through hole (1-3) is provided on the rear fixed shell (1-2), and the fluid replenishment through hole (1-3) is used to replenish silicone oil (3) into the liquid bag (2), and the diameter of the fluid replenishment through hole (1-3) is d1. The axis AA', the horizontal center line BB' of the fixed shell (1) and the vertical center line CC' of the fixed shell (1) are in the same plane, and the angle between AA' and BB' is α1; a connecting through hole (1-4) is provided at the rear end of the rear fixed shell (1-2), the opening direction of the connecting through hole (1-4) is parallel to the opening cross section of the left end of the rear fixed shell (1-2), the connecting through hole (1-4) is used to connect the connector (4), the diameter of the connecting through hole (1-4) is d2, and the depth of the connecting through hole (1-4) is l1; the material of the fixed shell (1) is required not to undergo plastic deformation under the action of the shock wave, so as to protect the liquid capsule (2); The liquid capsule (2) is a hollow sphere, and the liquid capsule (2) is filled with silicone oil (3). The liquid capsule (2) is placed in a fixed shell (1) and fixedly connected to a rear fixed shell (1-2) by an adhesive. The outer diameter of the liquid capsule (2) is r3=r1, and the thickness is t1, which satisfies 2mm≤t1≤3mm. The liquid capsule (2) is provided with a liquid infusion port (2-2), and the liquid infusion port (2-2) is coaxial with the liquid infusion through hole (1-3). The outer diameter of the liquid infusion port (2-2) is d3, and the liquid infusion port (2-2) is inserted into the liquid infusion through hole (1-3). When the level of human craniocerebral shock wave injury is detected, the liquid infusion port (2-2) is in a sealed state. After the level of the brain shock wave injury is detected, the silicone oil (3) is replenished through the liquid replenishment port (2-2) without disassembling the device; the rear end of the liquid capsule (2) is provided with a capsule opening (2-3), the capsule opening (2-3) is circular, the inner diameter of the capsule opening (2-3) is d4, the capsule opening (2-3) is coaxial with the connecting through hole (1-4) of the rear fixed shell (1-2) and is exactly located in the connecting through hole (1-4), so that the connecting through hole (1-4) of the liquid capsule (2) and the fixed shell (1) overlap to form one hole, so that the one-way valve (5) in the connector (4) is in direct contact with the silicone oil; the silicone oil (3) is used to simulate cerebrospinal fluid; The connector (4) is cylindrical in shape, has an outer diameter of r4, and has a length of l2. A boss (4-1) is arranged on the outer wall of the connector (4), the boss (4-1) is circular, has a radius of r5, r5>r4, has a thickness of t2, and a distance between a front end face of the boss (4-1) and a front end face of the connector (4) is l3. The outer wall of the connector (4) located in front of the boss (4-1) is tapped with a front connecting thread (4-2), and the outer side of the connector (4) located behind the boss (4-1) is tapped with a rear connecting thread (4-3), the length of the front connecting thread (4-2) is l4, and the front connecting thread (4-2) is inserted into a connecting through hole (1-4) and a bag opening (2-3) of the rear fixed shell (1-2), so that the connector (4) is connected to the fixed shell (1). The length of the rear connecting thread (4-3) is l5, and the rear connecting thread (4-3) is inserted into the fixing through hole 6-1 of the fixing device (6), so that the connector (4) is connected to the fixing device (6); the connector (4) is provided with three mounting through holes (4-4), and the diameter of the mounting through holes (4-4) is d5; the centers of the three mounting through holes (4-4) are located on a concentric circle on the left end face of the connector (4), and the angles between the mounting through holes (4-4) are 120°; a connecting hole (4-5) is provided at the rear end of the connector (4), the connecting hole (4-5) is circular, the diameter of the connecting hole (4-5) is d6, and the depth of the connecting hole (4-5) is l6, and three one-way valves (5) are connected to the three mounting through holes (4-4) through the inside of the connecting hole (4-5); the connector (4) is made of the same material as the fixing housing (1); The one-way valve (5) is cylindrical in shape as a whole; the three one-way valves (5) are respectively installed in the three installation through holes (4-1) of the connecting pipe (4); the water inlet end of the one-way valve (5) faces the liquid bag (2), and the water outlet end is connected to the drainage pipe (7); after the one-way valve (5) is opened, the silicone oil (3) flows into the negative pressure pipe (8-2) through the one-way valve (5) and the drainage pipe (7); the pre-pressure of the one-way valve (5) is ≤235 kPa; The fixture (6) is a rectangular parallelepiped, the length of the fixture (6) is l7, and the width of the fixture (6) is l8; a fixing through hole (6-1) is provided in a direction perpendicular to the front end face of the fixture (6), the center of the fixing through hole (6-1) is located at the horizontal center of the front end face of the fixture (6), the distance between the center of the fixing through hole 6-1 and the upper end face of the fixture (6) is l9, and the diameter of the fixing through hole (6-1) is d7; an internal thread is provided in the fixing through hole (6-1), and the connector (4) and the fixture (6) are connected by thread; the fixture (6) is made of steel material; The drainage pipe (7) is a hose, the front end of the drainage pipe (7) passes through the fixed through hole (6-1) and is connected to the water outlet end of the one-way valve (5), and the rear end of the drainage pipe (7) is connected to the negative pressure pipe (8-2); The negative pressure collector (8) is composed of a protective shell (8-1), three negative pressure tubes (8-2), and foam 8-3. The protective shell (8-1) is a rectangular box. The length of the protective shell (8-1) is l 10 , the height of the protective shell (8-1) is l 11 , the width of the protective shell (8-1) is l 12 The thickness of each surface of the protective shell (8-1) is t3. The protective shell (8-1) is used to observe the flow rate of the silicone oil (3) in the negative pressure tube (8-2). Three negative pressure tubes (8-2) are placed vertically in the protective shell (8-1). The distance between the top of the negative pressure tube (8-2) and the lower surface of the top surface of the protective shell (8-1) is l. 13 The distance between the bottom of the negative pressure tube (8-2) and the upper surface of the bottom of the protective shell (8-1) is l 14 , the center line spacing of the negative pressure pipe (8-2) is l 15 The three negative pressure tubes (8-2) are all blood collection tubes. After the one-way valve (5) is opened, it is used to collect the silicone oil (3) flowing out through the drainage tube (7); the foam 8-3 fills the empty space in the negative pressure collector (8) to protect the negative pressure tube (8-2).

2. A device for detecting the degree of human craniocerebral shock wave injury as claimed in claim 1, characterized in that The inner radius r1 of the fixed shell (1) satisfies 50mm≤r1≤90mm, and the outer radius r2 of the fixed shell (1) satisfies 2mm≤r2-r1≤10mm; the diameter d1 of the fluid infusion through hole (1-3) satisfies 10mm≤d1≤20mm, and the angle α1 between AA' and BB' satisfies 45°≤α1≤75°; the diameter d2 of the connecting through hole (1-4) satisfies 50mm≤d2≤80mm, and the depth l1 of the connecting through hole (1-4) satisfies l1=(d2tanθ) / 2.

3. A device for detecting the degree of human craniocerebral shock wave injury as claimed in claim 1, characterized in that The thickness t1 of the liquid capsule (2) satisfies 2mm≤t1≤3mm; the outer diameter d3 of the liquid infusion port (2-2) satisfies d1-2mm≤d3≤d1-1mm, and the inner diameter d4 of the capsule opening (2-3) at the rear end of the liquid capsule (2) is equal to d2.

4. A device for detecting the degree of human craniocerebral shock wave injury as claimed in claim 1, characterized in that The outer diameter r4 of the connector (4) is equal to d4 / 2, and the length l2 of the connector (4) satisfies 30mm≤l2≤60mm; the radius r5 of the boss (4-1) satisfies 5mm≤r5-r4≤7mm, the thickness of the boss (4-1) is 2mm≤t2≤3mm, and the distance l3 between the front end face of the boss (4-1) and the front end face of the connector (4) is equal to l1+t1; the length l4 of the front connecting thread (4-2) is equal to l3, and the rear connecting thread (4-2) is equal to l4. The length of the thread (4-3) is l5=l2-l4-t2; the diameter of the mounting through hole (4-4) is 10mm≤d5≤2r4 / 3; the radius r6 of the concentric circle where the centers of the three mounting through holes (4-4) are located satisfies d5≤r6≤2d5; the diameter d6 of the connecting hole (4-5) satisfies 2r4-20mm≤d6≤2r4-4mm, and the depth l6 of the connecting hole (4-5) satisfies 10mm≤l6≤40mm.

5. A device for detecting the degree of human craniocerebral shock wave injury as claimed in claim 1, characterized in that The length l7 of the fixture (6) satisfies 10mm≤l7-2r4≤20mm, and the width l8 of the fixture (6) satisfies 5mm≤l8-l5≤10mm; the diameter d7 of the fixing through hole (6-1) is 2r4, and the distance l9 between the center of the fixing through hole (6-1) and the upper end surface of the fixture (6) satisfies 10mm≤l9≤17mm; the fixing through hole 6-1 is provided with an internal thread, and the connector (4) and the fixture (6) are connected by threads, and the drainage tube (7) passes through the fixing through hole (6-1) and is connected to the negative pressure tube (8-2) in the negative pressure collector (8).

6. A device for detecting the degree of human craniocerebral shock wave injury as claimed in claim 1, characterized in that The length of the drainage tube (7) is greater than l2+l8+l 11 .

7. A device for detecting the degree of human craniocerebral shock wave injury as claimed in claim 1, characterized in that The length l of the protective shell (8-1) of the negative pressure collector (8) 10 Meet 95mm≤l 10 ≤110mm, protective shell (8-1) height l 11 = l 10 , the width of the protective shell (8-1) is l 12 Meet 50mm≤l 12 ≤l 10 The thickness t3 of each surface of the protective shell (8-1) satisfies 5mm≤t3≤10mm; the distance between the top of the negative pressure tube (8-2) and the lower surface of the top surface of the protective shell (8-1) is 5mm≤l 13 ≤7mm, the distance between the bottom of the negative pressure tube (8-2) and the upper surface of the bottom surface of the protective shell (8-1) is 5mm≤l 14 ≤7mm, center line spacing of negative pressure pipe (8-2) l 15 Meet 17mm≤l 15 ≤l 10 / 3.

8. A device for detecting the degree of human craniocerebral shock wave injury as claimed in claim 1, characterized in that The density of the material of the fixed shell (1) is ρ1≥1.0 g / cm 3 , yield strength σ1≥100MPa; the viscosity coefficient of the silicone oil (3) is less than 2000cs; the connector (4) is made of the same material as the fixed shell (1), and the fixer (6) is made of steel material; the protective shell (8-1) is made of transparent material.

9. A method for detecting the level of human craniocerebral blast wave injury using the human craniocerebral blast wave injury level detection device as claimed in claim 1, characterized in that The following steps are involved: The first step is to install the human cranial brain shock wave injury level detection device and check: 1.1 The liquid infusion port (2-1) is passed through the liquid infusion through hole (1-3), the liquid capsule (2) and the rear fixed shell (1-2) are connected by adhesive, the front fixed shell (1-1) and the rear fixed shell (1-2) are connected by threads, and silicone oil is filled into the liquid capsule (2) through the liquid infusion port (2-2); 1.2 Install three one-way valves (5) in the three installation holes (4-1) of the connecting pipe (4) respectively, with the water inlet end of the one-way valve (5) facing the liquid capsule (2); 1.3 The connector (4) is connected to the fixture (6) via the rear connection thread (4-3) and the fixing through hole (6-1); 1.4 Connect the water outlet ends of the three one-way valves (5) to the front ends of the three drainage pipes (7); 1.5 Connect the rear ends of the three drainage tubes (7) to the three negative pressure tubes (8-2) of the negative pressure collector (8); 1.6 The assembled human craniocerebral shock wave injury level detection device is placed on the test site through a fixture (6), the lower end of the fixture (6) is fixed to the ground or a heavier support, and the spatial position of the human craniocerebral shock wave injury level detection device is adjusted by adjusting the height and position of the fixture (6); The second step is to use the target to detect craniocerebral shock wave injury by: 2.1 Detonating explosives; 2.2 Under the action of the shock wave, the pressure in the silicone oil (3) is greater than the opening pressure of the one-way valve (5), the one-way valve (5) opens, and the silicone oil (3) around the connector (4) flows into the negative pressure pipe (8-2) in the negative pressure collector (8) through the one-way valve (5) and the drainage pipe (7) under the action of the pressure difference; 2.3 Let the three one-way valves (5) be the first one-way valve, the second one-way valve and the third one-way valve, and let the pre-pressure for opening the first one-way valve be P a , the pre-pressure for opening the second one-way valve is P b , the pre-pressure for opening the third one-way valve is P c , satisfying P a <P b <P c ; 2.4 After the explosion, the negative pressure pipe (8-2) is taken out from the negative pressure collector (8), and the damage level is determined by observing whether there is silicone oil in the pipe; if none of the one-way valves are open, there is no damage or slight damage; if only the first one-way valve is open, there is slight damage; if the first one-way valve and the second one-way valve are open, there is moderate damage; if the first one-way valve, the second one-way valve and the third one-way valve are all open, there is severe damage; 2.5 After the test, the negative pressure tube (8-2) and the corresponding drainage tube (7) that collected the silicone oil (3) are replaced, and the silicone oil (3) is replenished into the liquid bag (2) through the liquid infusion port (8-2), and the test is continued.

10. The method for detecting the level of human craniocerebral blast wave injury using the human craniocerebral blast wave injury level detection device as claimed in claim 9, characterized in that 2.3 Step: Determine Pa=100kPa, Pb=173kPa, Pc=235kPa.

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