Wearable trauma simulation device

Abstract

The invention discloses a wearable trauma simulation device in the technical field of first-aid training and drilling equipment. The device consists of a liquid storage module, a pumping module, a control module and a wearing module, wherein the liquid storage module adopts a flexible silica gel liquid storage bag and an anti-precipitation flow guide structure, and supports rapid liquid change and uniform liquid discharge; the pumping module accurately controls the micro peristaltic pump through a PID (Proportion Integration Differentiation) algorithm to realize pulse (80ml / s) and continuous (5-30ml / min) dual-mode bleeding simulation; the control module integrates a physical key and a wireless communication unit, and supports three-level flow switching and APP remote programming; the wearing module adopts a composite structure of bionic skin (10% of a surface layer and 50% of a bottom layer) with gradually-changed pores and a magnetic bandage, so that tactical-level fitting and fixing are realized. The device breaks through the limitation of a traditional makeup technology, the dynamic bleeding truth degree reaches 92%, the wearing time is shortened to be within 30 seconds, the device can be repeatedly used for 500 times or above, and the actual combat level of medical service drilling such as first-aid training is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of first aid training and drill equipment, and in particular to a wearable trauma simulation device. Background Art

[0002] During medical drills like first aid training, large numbers of casualties must be simulated in a short period of time. Furthermore, the injuries required for these exercises are complex, and some, such as heavy bleeding from the limbs, are difficult to achieve realistically with makeup techniques. Therefore, a bleeding simulator is necessary. Existing wearable trauma simulators offer limited functionality and lack the advantages of being wearable, capable of controlling bleeding, and capable of controlling the amount of bleeding with buttons, such as heavy, medium, and light bleeding.

[0003] Therefore, the development of a wearable trauma simulation device has become an urgent need. Summary of the Invention

[0004] The purpose of the present invention is to provide a wearable trauma simulation device that solves the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a wearable trauma simulation device, comprising: a liquid storage module, the liquid storage module comprising a flexible silicone liquid storage bag, a quick-release interface, and an anti-sedimentation diversion structure, wherein: the wall thickness of the flexible silicone liquid storage bag is 0.5±0.1mm, and the elongation is ≥300%;

[0006] A pumping module includes a micro peristaltic pump, a bidirectional flow sensor, and a PID controller, wherein: the micro peristaltic pump has a maximum flow rate of 100 ml / min and an operating pressure of 0.3 MPa; the transfer function of the PID controller is G(s)=0.8+\frac{0.05}{s}+0.1sG(s)=0.8+s0.05+0.1s;

[0007] The control module integrates physical buttons, a wireless communication unit, and a multi-mode selection switch. The physical buttons include a three-level pressure-sensitive switch corresponding to a maximum bleeding volume of 50 ml / min, a medium bleeding volume of 30 ml / min, and a minimum bleeding volume of 10 ml / min. The wireless communication unit supports Bluetooth 5.0 and Wi-Fi 6 dual-mode protocols.

[0008] The wearable module consists of a bionic skin layer, a magnetic fixing patch and an adaptive strap, wherein: the porosity of the bionic skin layer gradually changes from 10% on the surface to 50% on the bottom layer, and the thickness is 0.3±0.05mm; the magnetic fixing patch uses an NdFeB permanent magnet with a magnetic flux density of 1.2±0.1T.

[0009] As a further optimization of this technical solution, the quick-release interface supports rapid docking with the liquid path of the pumping module.

[0010] As a further optimization of the present technical solution, a honeycomb-shaped guide grid is provided inside the anti-sedimentation guide structure, the aperture of which is 2±0.5 mm and the spacing between adjacent grids is 1.5 mm.

[0011] As a further optimization of the present technical solution, the integral time constant of the PID controller is 20s, and the differential time constant is 5s.

[0012] As a further optimization of the present technical solution, the surface layer of the bionic skin layer is a polyurethane elastomer, and the bottom layer is a silicone composite layer.

[0013] As a further optimization of this technical solution, the tensile strength of the adaptive strap is ≥150N, and supports stepless adjustment of the length from 50 to 400mm.

[0014] As a further optimization of this technical solution, the simulated blood of the liquid storage module is composed of the following components: sodium carboxymethyl cellulose: 1.5wt%, glycerol: 4wt%, red iron oxide: 0.8wt%, deionized water: balance; the viscosity of the simulated blood is 3.5±0.2cP25℃, and the density is 1.05±0.01g / cm 3 .

[0015] As a further optimization of the present technical solution, the driving voltage of the micro peristaltic pump of the pumping module is 12VDC, and the power is ≤5W; the measurement accuracy of the bidirectional flow sensor is ±1% FS, and the response time is ≤10ms.

[0016] Compared with existing technologies, the wearable trauma simulation device of the present invention has the following beneficial effects: High simulation of dynamic bleeding: The pulse mode simulates arterial rupture, and the fluid jet morphology is 92% similar to the real injury; the continuous mode realizes venous bleeding (flow rate 5-30ml / min linearly adjustable), and the blood stain diffusion trajectory is consistent with the infiltration characteristics of human tissue. Improved wearability: The magnetic patch (magnetic flux density 1.2T) and the adaptive strap are coordinated for fixation, the wearing time is ≤30 seconds, and tactical actions are supported (the shedding rate is <0.3%); the whole device weighs <800g, which is 84% lighter than traditional hydraulic equipment (>5kg). Breakthrough in precise controllability: Three-level flow control (large / medium / small: 50 / 30 / 10ml / min) is combined with a PID algorithm (error <±1.5ml / min); Mesh networking synchronous control is supported (delay <10ms), and 20 standardized injury scenarios can be simulated in batches. Long-term economic advantage: Can be refilled ≥500 times, reducing consumable costs by 90%; modular design supports rapid repair and replacement, with a device lifespan of >10,000 hours (MTBF ≥8,000h). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the wearable module of the present invention;

[0018] Figure 2 This is a schematic structural diagram of the liquid storage module of the present invention;

[0019] Figure 3 Schematic diagram of the bionic skin layer structure of the present invention;

[0020] Figure 4 Schematic diagram of the wearable module and human limb patch of the present invention;

[0021] Figure 5 This is a block diagram of the pumping module control circuit of the present invention.

[0022] In the figure: 101, flexible silicone liquid storage bag; 102, quick-release interface; 103, anti-precipitation diversion structure; 201, micro peristaltic pump; 401, bionic skin layer; 11, epidermis; 12, dermis; 13, muscle layer; 402, magnetic fixing patch; 403, adaptive strap. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1:

[0025] See also Figures 1 to 5 This embodiment provides a technical solution: a wearable trauma simulation device, comprising: a liquid storage module, the liquid storage module comprising a flexible silicone liquid storage bag 101, a quick-release interface 102, and an anti-precipitation diversion structure 103, wherein: the wall thickness of the flexible silicone liquid storage bag 101 is 0.5±0.1mm, and the stretchability is ≥300%;

[0026] The pumping module includes a micro peristaltic pump 201, a bidirectional flow sensor, and a PID controller. The micro peristaltic pump 201 has a maximum flow rate of 100 ml / min and an operating pressure of 0.3 MPa. The transfer function of the PID controller is G(s) = 0.8 + \frac{0.05}{s} + 0.1sG(s) = 0.8 + s0.05 + 0.1s.

[0027] The control module integrates physical buttons, wireless communication units, and a multi-mode selection switch. The physical buttons include a three-level pressure-sensitive switch, corresponding to a maximum bleeding volume of 50ml / min, a medium bleeding volume of 30ml / min, and a minimum bleeding volume of 10ml / min. The wireless communication unit supports Bluetooth 5.0 and Wi-Fi 6 dual-mode protocols.

[0028] The wearable module consists of a bionic skin layer 401, a magnetic fixing patch 402 and an adaptive strap 403. The porosity of the bionic skin layer 401 gradually changes from 10% on the surface to 50% on the bottom layer, and the thickness is 0.3±0.05mm. The magnetic fixing patch 402 uses an NdFeB permanent magnet with a magnetic flux density of 1.2±0.1T.

[0029] In a specific implementation, the quick-release interface 102 supports rapid docking with the fluid path of the pumping module.

[0030] In specific implementation, a honeycomb-shaped guide grid is provided inside the anti-sedimentation guide structure 103, the aperture of which is 2±0.5 mm, and the distance between adjacent grids is 1.5 mm.

[0031] In a specific implementation, the integral time constant of the PID controller is 20s, and the differential time constant is 5s.

[0032] In a specific implementation, the surface layer of the bionic skin layer 401 is a polyurethane elastomer, and the bottom layer is a silicone composite layer.

[0033] In a specific implementation, the tensile strength of the adaptive strap 403 is ≥150N, and supports stepless adjustment of the length from 50 to 400 mm.

[0034] In specific implementation, the simulated blood in the liquid storage module is composed of the following components: sodium carboxymethyl cellulose: 1.5wt%, glycerol: 4wt%, red iron oxide: 0.8wt%, deionized water: balance; the viscosity of the simulated blood is 3.5±0.2cP25℃, and the density is 1.05±0.01g / cm 3 .

[0035] In a specific implementation, the driving voltage of the micro peristaltic pump 201 of the pumping module is 12 VDC, and the power is ≤5 W; the measurement accuracy of the bidirectional flow sensor is ±1% FS, and the response time is ≤10 ms.

[0036] The device of the present invention is suitable for full-domain combat simulation on land, sea and air.

[0037] More specifically, the present invention adopts the following technical solutions:

[0038] Highly bionic liquid storage module

[0039] Flexible liquid storage unit: A flexible silicone liquid storage bag 101 with multiple chambers is made of medical-grade silicone material (thickness 0.5mm, elongation ≥300%), and an anti-precipitation diversion structure 103 with an anti-precipitation diversion grid is set inside to ensure uniform distribution of simulated blood; the anti-precipitation diversion structure 103 is a split design, with a single bag volume of 50ml×3 groups, and a total capacity of 150ml (supports quick replacement); fast liquid exchange interface: standardized quick-release connector 102 (compliant with ISO 594-1 specifications), supports liquid storage bag replacement within 3 seconds, and is suitable for different injury locations such as upper limbs, lower limbs and torso.

[0040] Intelligent pumping system

[0041] A micro peristaltic pump 201 with a dual-mode drive mechanism, a bidirectional flow sensor and a PID controller: Pulse mode: simulates an arterial rupture scenario, with a peak flow rate of 80 ml / s, a pulse interval of 0.5 s (adjustable), a fluid Reynolds number (Re) > 2000, and a turbulent jet effect; Continuous mode: simulates a venous bleeding scenario, with a flow rate of 5-30 ml / min linearly adjustable, and a laminar flow state (Re < 500) to achieve a blood slow seepage effect; Closed-loop control unit: integrated PID algorithm (proportional coefficient Kp = 0.8, integral time Ti = 20 s, differential gain Kd = 0.1), and a flow control error of < ±2%.

[0042] Human-computer interaction control system

[0043] Hardware interaction layer: physical button: three-position touch switch (large / medium / small bleeding volume corresponds to 50 / 30 / 10ml / min); status indicator: RGB LED real-time feedback device working status (standby / running / fault); software control layer: Bluetooth 5.0 / Wi-Fi6 dual-mode communication, support mobile APP remote control; built-in 20 preset injury scenarios (such as "femoral artery rupture" and "shrapnel penetration"), support custom bleeding curve programming (flow rate-time function).

[0044] Tactical-grade wearable structure

[0045] Bionic fit design: The base material of the bionic skin layer 401 is made of polyurethane-silicone composite elastomer (Shore hardness 20A), with a thickness of 0.3mm and an air permeability of ≥500g / m 2 24 hours; the wound tract structure is multi-layered and hollowed (epidermis 11 / dermis 12 / muscle 13), achieving >90% similarity to human tissue through 3D printing; enhanced fixation solution: Magnetic fixation patch 402 is a composite of a neodymium iron boron magnetic patch (magnetic flux density 1.2T) and medical pressure-sensitive adhesive, with a peel strength of ≥1.5N / cm; adaptive strap 403 supports stepless adjustment within a limb diameter range of 50-400mm.

[0046] Embodiment 2 technical solution:

[0047] Adaptive bandage: Adaptive bandage 403 uses highly elastic TPU material (tensile strength 180N) and has stepless length adjustment (50-400mm); pumping module upgrade: integrated bidirectional flow sensor (accuracy ±1% FS), drive voltage 12V DC, power 4.8W; simulated blood formula: 1.5% sodium carboxymethyl cellulose, 4% glycerol, 0.8% red iron oxide, deionized water as the balance.

[0048] Operation steps: inject simulated blood into the flexible silicone liquid storage bag 101 (viscosity 3.5 cP, density 1.05 g / cm 3 The adaptive bandage 403 wraps around the femoral artery in the lower limb and locks after stretching to 300mm. The "venous oozing" mode (flow rate 25ml / min) is set via the app. The flow sensor provides real-time data feedback to the PID controller, dynamically adjusting the pump speed. Technical results: The bandage has a tensile strength of 180N; the flow control error is ±1.2ml / min (compared to ±5ml / min with traditional open-loop control); and the stability of the simulated blood is improved (24-hour sedimentation <0.5%).

[0049] Embodiment 3 technical solution:

[0050] Adaptation to extreme environments: The liquid storage module is added with ethylene glycol-based antifreeze (freezing point -40°C) and the viscosity is 3.7 cP (-30°C); Thermal management design: The pumping module is integrated with a semiconductor refrigeration chip (temperature difference ±15°C); Magnetic attraction enhancement: The surface of the magnetic fixing patch 402 is plated with a nickel anti-corrosion layer (no rust after 96 hours of salt spray test).

[0051] Operational steps: At -25°C, the device automatically switches to low-temperature mode (intermittent pulse anti-freeze); the semiconductor refrigeration chip maintains the liquid temperature above -20°C; the magnetic fixing patch 402 has a 99.7% retention reliability in sea state 6 (95% humidity). Technical results: 100% low-temperature startup success rate (traditional solutions fail at -10°C); 98% liquid fluidity retention rate (traditional solutions freeze at -20°C); and a 0.3% shedding rate in salt spray environments (traditional Velcro solutions have a 22% rate).

[0052] Embodiment 4 technical solution:

[0053] Multi-injury coordination: Mesh networking synchronously controls 5 devices with a delay of less than 10ms; simulated blood upgrade: adding fluorescent dye (ultraviolet excitation wavelength 365nm) for night drills.

[0054] Operational steps: The command terminal issues a combined command for "torso penetrating wound + upper extremity artery rupture." The devices are networked and synchronized to initiate pulsed spray (80ml / s) and continuous bleeding (30ml / min). UV light illuminates the bleeding trajectory, allowing for real-time assessment of hemostasis effectiveness. Technical results: Network synchronization error is less than 10ms (single-point Bluetooth control >100ms); the fluorescent visible range reaches 50 meters (compared to 5 meters for traditional dyes).

[0055] The technical effects of the above embodiments are as follows:

[0056] Dynamic Simulation: The fluid dynamic characteristics (flow velocity, flow pattern) in pulse mode are 92% similar to real arterial bleeding, significantly better than traditional technology (<40%).

[0057] Tactical adaptability: The weight of the whole device is less than 800g, the wearing time is ≤30 seconds, and it supports high-intensity actions such as tactical crawling and climbing (the shedding rate is less than 0.1%).

[0058] Precise controllability: PID algorithm is used to achieve flow control error <±1.5ml / min and response delay <200ms;

[0059] Long-term reliability: The liquid storage module can be refilled and reused ≥500 times, and the pumping system life is >10,000 hours (MTBF ≥8,000h);

[0060] Extended compatibility: Supports Mesh self-organizing network technology, with synchronization control delay of 100 devices less than 10ms, meeting the needs of brigade-level exercises.

[0061] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wearable trauma simulation device, characterized in that: include: A liquid storage module, the liquid storage module comprising a flexible silica gel liquid storage bag (101), a quick-release interface (102) and an anti-sedimentation diversion structure (103), wherein: the wall thickness of the flexible silica gel liquid storage bag (101) is 0.5±0.1 mm, and the elongation is ≥300%; A pumping module comprises a micro peristaltic pump (201), a bidirectional flow sensor and a PID controller, wherein: the maximum flow rate of the micro peristaltic pump (201) is 100 ml / min, and the working pressure is 0.3 MPa; the transfer function of the PID controller is G(s)=0.8+\frac{0.05}{s}+0.1sG(s)=0.8+s0.05+0.1s; The control module integrates physical buttons, a wireless communication unit, and a multi-mode selection switch. The physical buttons include a three-level pressure-sensitive switch corresponding to a maximum bleeding volume of 50 ml / min, a medium bleeding volume of 30 ml / min, and a minimum bleeding volume of 10 ml / min. The wireless communication unit supports Bluetooth 5.0 and Wi-Fi 6 dual-mode protocols. The wearable module consists of a bionic skin layer (401), a magnetic fixing patch (402) and an adaptive strap (403), wherein: the porosity of the bionic skin layer (401) gradually changes from 10% in the surface layer to 50% in the bottom layer, and the thickness is 0.3±0.05mm; the magnetic fixing patch (402) adopts NdFeB permanent magnets, and the magnetic flux density is 1.2±0.1T.

2. A wearable trauma simulation device according to claim 1, characterized in that: The quick-release interface (102) supports quick docking with the fluid path of the pumping module.

3. A wearable trauma simulation device according to claim 2, characterized in that: The anti-precipitation diversion structure (103) is internally provided with a honeycomb diversion grid, the aperture of which is 2±0.5 mm, and the spacing between adjacent grids is 1.5 mm.

4. A wearable trauma simulation device according to claim 3, characterized in that: The integral time constant of the PID controller is 20s, and the differential time constant is 5s.

5. The wearable trauma simulation device according to claim 4, characterized in that: The surface layer of the bionic skin layer (401) is a polyurethane elastomer, and the bottom layer is a silicone composite layer.

6. The wearable trauma simulation device according to claim 5, characterized in that: The self-adaptive strap (403) has a tensile strength of ≥150N and supports stepless adjustment of the length from 50 to 400 mm.

7. The wearable trauma simulation device according to claim 6, characterized in that: The simulated blood in the liquid storage module is composed of the following components: sodium carboxymethyl cellulose: 1.5wt%, glycerol: 4wt%, red iron oxide: 0.8wt%, and deionized water: the balance; the viscosity of the simulated blood is 3.5±0.2cP (25°C) and the density is 1.05±0.01g / cm 3 .

8. The wearable trauma simulation device according to claim 7, characterized in that: The driving voltage of the micro peristaltic pump (201) of the pumping module is 12VDC, and the power is ≤5W; the measurement accuracy of the bidirectional flow sensor is ±1% FS, and the response time is ≤10ms.

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