Self-adjusting liquid-filled spaceflight anti-G suit and adjusting and controlling method

Abstract

The invention discloses a self-adjusting liquid-filled spaceflight anti-G suit and a regulation and control method thereof. A liquid pressurizing system and a physiological monitoring system are combined. Physiological parameters such as electrocardio, blood pressure and respiration are monitored in real time and compared with baseline physiological data obtained under the standard earth gravity, and when the real-time data deviates from a baseline and exceeds a preset deviation threshold value, liquid is controlled to be injected into a distributed liquid filling bag from a liquid storage device on the side face of a seat through a liquid filling pipeline; liquid pressure distribution changing in the longitudinal direction of the human body is formed on the chest, the waist and abdomen, the thighs and the shanks; when the physiological data return to the safety range and lasts for preset time, the lower hem backflow opening is opened, and the liquid flows back to gradually relieve pressure. The pair of anti-G anti-static pressure shoes is fast in response, smooth in pressure distribution, capable of relieving blood deposition of lower limbs and improving blood supply of the brain, capable of achieving the anti-G effect and wearing comfort and suitable for astronaut protection under different overload working conditions.

Description

1. Technical Field

[0001] This invention relates to the field of manned spaceflight technology, specifically to a self-regulating liquid-filled anti-G suit and its control method. By combining a liquid pressurization system and a physiological monitoring system, it provides uniform pressure support for astronauts, ensuring comfort and safety under overload conditions. 2. Background Technology

[0002] To cope with the +Gx overload faced by astronauts during manned spacecraft missions and to ensure their safety and operational efficiency, astronauts need to wear anti-G equipment. Traditional inflatable anti-G suits distribute pressure on the body surface through pressurized air bladders, mitigating the impact of overload on blood circulation and thus exerting an anti-G effect. However, traditional inflatable anti-G suits have problems such as long response time, high heat load, and poor comfort.

[0003] To address the shortcomings of pneumatic anti-G suits, researchers both domestically and internationally have conducted research on liquid-filled anti-G suits. Compared to gases, liquids have a higher density, thus providing greater pressure support within a smaller volume. Compared to traditional pneumatic anti-G suits, liquid-filled anti-G suits, such as the one proposed in patent CN214397252U, regulate pressure through liquid flow, enabling a faster response to external overload changes while providing a smoother pressure distribution, thereby effectively reducing the risk of blood pooling. International physiological studies have also shown that liquid coverage has a positive effect on blood circulation and can enhance cardiovascular function; especially in the design of full-coverage anti-G suits, the larger the coverage area, the better the anti-G effect.

[0004] The development of liquid-filled anti-G suits still faces some challenges. For example, while the liquid-filled anti-G suit proposed in patent CN102582852A provides relatively efficient anti-G support, its coverage is mainly concentrated in the lower abdomen area, failing to provide astronauts with overall anti-G protection from the torso to the lower limbs. In addition, some simple liquid filling methods fail to fully consider the physiological changes of astronauts in varying overload environments, resulting in some designs lacking sufficient adaptability and individualized protection.

[0005] Real-time monitoring of astronauts' physiological state and adaptive adjustment have become a key direction in the design of liquid-filled anti-G suits. For example, patent CN113734481B proposes an anti-G suit that can adjust pressure in real time based on physiological data, realizing dynamic adjustment based on physiological signals. However, there is still room for further optimization in its specific pressurization method, pressurization medium, and pressure distribution, especially in achieving a smoother pressure gradient, improving comfort, and taking temperature control into account.

[0006] To address the aforementioned issues, this invention proposes a self-regulating liquid-filled anti-G suit for spacecraft. By combining real-time physiological monitoring with a liquid pressurization system, it creates a liquid pressure distribution that varies along the longitudinal direction of the human body and performs closed-loop regulation of the pressure in different areas. This allows astronauts to remain within a set physiological safety range under various overload conditions. 3. Summary of the Invention

[0007] The main objective of this invention is to provide a self-regulating liquid-filled anti-G suit and its control method. This anti-G suit employs a bladder-type liquid-filling design, autonomously adjusting the pressure gradient of different body parts through the coordination of a liquid pressurization system and a physiological state monitoring system. Specifically, this invention monitors astronauts' physiological changes (such as heart rate, blood pressure, and respiration) in real time and compares them with baseline physiological data obtained under standard Earth gravity conditions. Based on preset deviation thresholds and safety ranges, it adaptively adjusts the pressure distribution in different parts of the body, ensuring smooth blood flow and preventing excessive blood accumulation in the lower limbs that could affect blood supply to the upper body and brain. This effectively reduces or avoids physiological load and discomfort caused by high-G environments.

[0008] The liquid-filled anti-G suit of this invention is designed based on the body parameters of astronauts aged 40-50 years in standard ergonomics, ensuring it meets the needs of astronauts during normal movement and operation. The large-area coverage design below the armpits enhances protection for vital organs in the chest and abdomen and the blood return pathways of the lower limbs.

[0009] The liquid-filled anti-G suit consists of a sleeved top and trousers with shoes, employing an inner and outer layer design. The inner and outer layers are separated to form a liquid-filled cavity, facilitating the placement of liquid-filled bladders and pressurization. In one embodiment, the preferred spacing between the inner and outer layers is approximately 5 mm.

[0010] Specifically, the inner layer of the anti-G suit consists of antistatic treated cotton fabric and a rubberized, moisture-tight layer, providing a comfortable, close-fitting fit and facilitating the even distribution of liquid pressure to the skin. The outer layer uses high-strength, low-elongation fabric and an insulating layer to ensure the suit can withstand liquid pressure without harming the astronaut's body. Joints can be sewn with ordinary fabric, with the ends designed for pressure permeability. Rigid materials can be used on the outside of the joints for protection and support, balancing pressure resistance and flexibility.

[0011] To ensure joint flexibility and comfort, the garment features narrow outer side passages at the elbows and knees. This design maintains continuity of the fluid-filled chambers at the joints while reducing local stiffness, allowing the joints to maintain freedom of movement even after filling, and also facilitating folding and storage. The waist and hip areas are slightly wider than other areas to facilitate bending or sitting.

[0012] The liquid pressurization system regulates the pressure gradient of various parts of the human body in real time by controlling the liquid pressure. It includes a liquid storage device, filling pipes, filling bladders, pressure regulators, and return ports. The liquid storage device is preferably installed in a storage module on the side of the spacecraft seat, using high-strength, pressure-resistant flexible materials to adapt to the seat structure and ensure stable liquid storage. Its liquid capacity is typically 2.0L to 3.0L, for example, approximately 2.5L.

[0013] The fluid-filled conduits are responsible for delivering fluid from the storage device within the seat to the lower legs, thighs, abdomen, and chest of the anti-G suit, arranged along the torso and lower limbs within the suit. To create a reasonable pressure distribution in different areas, the cross-sectional area of ​​the fluid-filled conduits corresponding to the chest, abdomen, thighs, and lower legs decreases sequentially from the torso towards the lower limbs, thereby creating a fluid pressure that varies longitudinally between the fluid-filled bladders in the corresponding areas. In the overall design, the wall thickness of the fluid-filled conduits can be selected from 0.5mm to 1.5mm; in one specific embodiment, the wall thickness is approximately 1mm.

[0014] The fluid-filled bags are positioned in the chest, abdomen, thighs, and calves, employing a distributed, independent bag design. Each fluid-filled bag preferably includes multiple spaced-apart filling chambers, each connected to a corresponding branch pipeline via an independent inlet channel. This allows for independent adjustment of the fluid pressure in each area, improving the uniformity and safety of pressure distribution. The fluid-filled bags consist of two layers: an inner layer made of soft and elastic polyurethane-coated elastic fiber material, directly contacting the body while ensuring both fit and breathability; and an outer layer made of high-pressure resistant composite material, possessing excellent tensile strength, wear resistance, and high-pressure resistance, effectively resisting external pressure.

[0015] The pressure regulator is preferably located in the storage module of the space seat and connected to the controller. It is used to adjust the flow rate and / or pressure of the liquid supplied to each branch pipeline according to the data of the physiological monitoring system, so that the liquid pressure in different areas is dynamically adjusted according to the changes in the astronaut's physiological data, forming a pressure change gradient that matches the relative position of the heart.

[0016] The return port is located in the lower part of the filling chamber formed by the anti-G suit body and is equipped with a one-way fluid valve to ensure that the liquid flows only towards the storage device inside the seat, preventing liquid backflow in the system. When pressure relief is required, by controlling the opening of the return port, the liquid can flow back from each filling bag to the liquid storage device, achieving a smooth pressure relief.

[0017] In one embodiment, the wall thickness of the filling tubes in each location can be approximately 1 mm. The lumen diameter of the filling tube in the waist and abdomen can be approximately 7.7 mm, and the lumen diameters of the filling tubes in the chest, thigh, and calf areas are respectively a certain proportion of the waist and abdomen diameter, for example, approximately 80%, 60%, and 40%, to achieve gradient control by gradually decreasing the pressurization rate of the filling tubes from top to bottom. The specific values ​​mentioned above can be adjusted according to different astronaut types, mission requirements, and liquid properties.

[0018] The physiological monitoring system is used to collect and analyze the astronaut's physiological data, and may include an electrocardiogram (ECG) sensor, a cuff-type blood pressure monitor, a respiration sensor, and a display. The ECG sensor is preferably placed between the front of the astronaut's chest and the inner layer of the anti-G suit; the cuff-type blood pressure monitor is placed on the astronaut's upper arm and is designed with an adjustable cuff that fits snugly around the upper arm; the respiration sensor is placed on the astronaut's chest via a chest strap. The display shows real-time physiological data and the working status of the anti-G suit.

[0019] The outputs of each physiological sensor are connected to the input of the display via signal lines, and the output of the display is connected to the input of the controller. The controller processes and analyzes the data, using physiological data collected under standard Earth gravity conditions as baseline physiological data, and sets preset deviation thresholds, safety ranges, and preset time control parameters according to medical parameters and mission requirements. When the deviation of real-time physiological data from the baseline physiological data exceeds the preset deviation threshold, the display will issue a warning message through color change and / or flashing. At the same time, the controller sends a control signal to the pressure regulator to inflate the fluid-filled bladders in each part of the astronaut's body to enhance the astronaut's tolerance to acceleration overload.

[0020] When the real-time physiological data returns to a safe range, the controller can stop increasing the fluid volume, putting the system into a maintenance state where the fluid pressure remains essentially constant. In one specific embodiment, a certain percentage of the baseline physiological data (e.g., about 30%) can be selected as a preset deviation threshold, and about 1 minute can be selected as the preset time. That is, when the physiological data remains within the safe range for about 1 minute, the system will no longer perform further fluid filling or draining adjustments.

[0021] When the load increases again and parameters such as heart rate, blood pressure, and respiratory rate exceed the upper limit of the safe range, the controller restarts the filling process to further regulate the pressure in each area. As the spacecraft approaches stable operation, if the astronaut's physiological data remains stable and within safe ranges, the controller opens the one-way valve at the return port via an output control signal, allowing the liquid to flow from the filling bag back to the storage device through the return pipe. During the liquid discharge process, the pressure inside the bag gradually decreases to avoid discomfort caused by sudden pressure changes. The depressurization rate can be preset or adjusted according to the trend of real-time physiological data changes, thus achieving phased and gradual depressurization.

[0022] Beneficial Effects: This invention's self-regulating liquid-filled anti-G suit combines a liquid pressurization system with a physiological monitoring system. Based on baseline physiological data obtained under standard gravity and preset deviation thresholds, it uses a closed-loop system to regulate the liquid pressure and pressure gradient in various parts of the body. Compared to traditional pneumatic anti-G suits, the liquid medium responds faster and the pressure is smoother, effectively reducing blood pooling in the lower limbs, ensuring blood supply to the brain and upper body, and reducing the risk of fainting. Distributed multi-cavity liquid-filled sacs are arranged in the chest, abdomen, thighs, and calves, along with liquid-filled channels that gradually decrease in cross-sectional area along the body's longitudinal direction, forming a longitudinal pressure gradient that conforms to the characteristics of blood circulation. The liquid storage device and pressure regulator are centrally located in the seat-side module, with a return port with a one-way valve in the hem area, resulting in a clear flow path and compact structure. Combined with the double-layered inner and outer clothing and the ergonomic design of the waist, hips, and joints, it can adaptively match individual needs under different overload conditions, balancing anti-G performance with wearing comfort, and improving mission safety and operational efficiency. 4. Description of the attached drawings

[0023] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a functional block diagram of the present invention;

[0025] Figure 2 This is a front view of the present invention;

[0026] Figure 3 This is the left view of the present invention;

[0027] Figure 4 This is a rear view of the present invention.

[0028] In the diagram: 1-Respiratory sensor; 2-Cuff blood pressure monitor; 3-Display; 4-ECG patch; 5-Controller; 6-Return port; 7-Inflation tubing; 8-Pressure regulator; 9-Liquid storage device. 5. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Figure 1This invention demonstrates the overall design and synergistic effect of the components of the self-regulating liquid-filled anti-G suit provided by an embodiment of the present invention. The anti-G suit is designed according to the astronaut's body parameters and employs a bladder-type liquid-filled design combining soft and hard materials to achieve uniform pressure support for the body. The liquid pressurization system delivers liquid stored in the liquid storage device 9 to the liquid-filled bladders in various locations via the liquid-filling pipe 7. Each liquid-filled bladder is connected to the liquid-filling pipe 7 via an independent branch pipe, and the pressure is controlled by a pressure regulator 8. The return port 6 is equipped with a one-way valve to ensure that the liquid can only flow back to the storage device 9, preventing reverse flow and maintaining system stability. The physiological monitoring system collects the astronaut's physiological data in real time through the electrocardiogram sensor 4, the cuff-type blood pressure monitor 2, and the respiration sensor 1, and transmits this data to the display 3. The controller 5 processes this data in real time and adjusts the pressure distribution in various locations according to the astronaut's physiological state to ensure the astronaut's comfort and safety in an overload environment.

[0031] The liquid-filled anti-G suit of this invention is designed with reference to the body parameters of astronauts aged 40-50 in the standard ergonomics. The design takes into account the needs of astronauts when performing normal movement and operation work, while ensuring the freedom of movement of each joint. In particular, the waist and hip areas are designed to be more spacious, so that astronauts can bend over or sit down without restriction.

[0032] like Figure 2 , Figure 3 , Figure 4 As shown, the anti-G suit consists of two parts: a sleeved top and trousers with shoes. It employs an inner and outer layer design, with the layer spacing used to arrange bladders for liquid filling and pressurization. In one embodiment, the layer spacing is preferably about 5 mm. The anti-G suit achieves the target pressure level by applying uniform pressure to the skin. To ensure even pressure distribution, a combination of soft and hard materials is used: the inner layer is made of antistatic treated cotton fabric as a comfort layer, combined with a rubber-textured water-tight layer, which better conforms to the skin and transmits the liquid filling pressure to the astronaut's body surface; the outer layer is composed of a composite structure of high-strength, low-elongation fabric and an insulating layer, ensuring that the suit will not cause harm to the astronaut's body when subjected to pressure.

[0033] Inflatable pouches are installed in the chest, abdomen, thighs, and calves. Each pouch consists of two layers: an inner layer made of soft and elastic polyurethane-coated elastic fiber, and an outer layer made of high-pressure resistant composite material. Each pouch is connected to a liquid storage device 9 via an inflation conduit 7. Liquid is delivered to each inflation site through the inflation conduit system, providing high flexibility and comfort, and ensuring a close fit to the skin. To further improve pressure uniformity, in a preferred embodiment, each inflatable pouch is designed to include multiple independent inflation chambers, each with an independent inlet channel, preventing discomfort or safety hazards caused by excessive local pressure.

[0034] like Figure 2 As shown, for ease of wear, the anti-G suit features a long zipper running from the neckline to the waist. An injection port, connected to a filling tube, is located approximately 100mm from the midline of the body on the right shoulder (left side of the image).

[0035] A notch design was added at the elbow joint, with a narrow connection on one side to ensure unobstructed fluid passage and reduce local fluid pressure, facilitating elbow movement. A similar notch was designed at the knee joint to ensure lower limb mobility and facilitate folding for storage, saving space. The shoe and trousers are sealed together with adhesive to ensure overall airtightness and pressure resistance.

[0036] The specific usage procedure is as follows: First, the astronaut puts on the anti-G suit under standard Earth gravity conditions (i.e., 1g), adjusts the ECG patch 4, the cuff-type blood pressure monitor 2 and the breathing sensor 1 to the appropriate position, and ensures that all connecting parts fit the body tightly.

[0037] In one embodiment, the electrocardiogram (ECG) sensor is placed between the astronaut's chest and the inner layer of the anti-G suit, with a sampling frequency of approximately 100 Hz; the cuff-type blood pressure monitor is placed on the astronaut's upper arm, with a sampling frequency of approximately 1 Hz; and the respiration sensor is placed on the astronaut's chest via a chest strap, with a sampling frequency of approximately 0.5 Hz. The specific sampling frequency can be adjusted as needed.

[0038] To ensure the accuracy of astronauts' physiological data before entering the overload environment, the monitoring system records the astronauts' physiological parameters under standard Earth gravity conditions. When the controller 5 is powered on, the ECG patch 4, cuff-type blood pressure monitor 2, and respiratory sensor 1 monitor the wearer's ECG, blood pressure, and respiratory parameters, respectively, establishing individual baseline physiological data. This data is transmitted to the display 3 for real-time display and stored in the controller 5, providing a basis for subsequent pressure regulation.

[0039] Once the astronaut enters the G-force environment, the liquid pressurization system activates. The liquid storage device 9, located in a storage module on the side of the spacecraft seat, is made of high-strength, pressure-resistant flexible material to adapt to the seat structure and ensure stable liquid storage. Its liquid capacity is typically 2.0L to 3.0L, for example, approximately 2.5L. This device is connected to the liquid filling system of the anti-G suit via piping, achieving stable liquid delivery and preventing direct compression during the astronaut's lying or G-force-induced conditions.

[0040] The pressure regulator 8 is also located in the spacecraft seat's storage module and connected to the controller 5. It dynamically adjusts the liquid pressure in different areas based on data from the physiological monitoring system, ensuring the anti-G suit's adaptability under various overload conditions. When the system is activated, the liquid in the liquid storage device 9 flows through the pressure regulator 8 to the filling pipes 7, sequentially delivering them to the filling sacs in the lower legs, thighs, abdomen, and chest. The filling pipes are arranged along the torso and lower limbs, with the cross-sectional area of ​​the lumen decreasing sequentially from the torso to the lower limbs, thus creating a longitudinally varying liquid pressure distribution to match the shape of the sacs in each area. In one specific embodiment, the wall thickness of the filling pipes in each area can be approximately 1 mm, the diameter of the filling pipe in the abdomen can be approximately 7.7 mm, and the diameters of the filling pipes in the chest, thighs, and lower legs can be approximately 80%, 60%, and 40% of the diameter of the abdomen, respectively.

[0041] To ensure smooth liquid flow and stable pressure within the system, the return port 6 is equipped with a one-way fluid valve. The return port is located in the lower part of the anti-load filling chamber. When the system needs to adjust the pressure, the return port is opened under the action of a control signal, allowing liquid to flow back from the filling bag to the storage device 9, thus preventing liquid from accumulating in certain areas and causing unnecessary pressure.

[0042] After the astronauts enter the G-force environment, the physiological monitoring system continues to operate. Controller 5, as the core of the system scheduling, collects real-time physiological data such as the astronauts' electrocardiogram, blood pressure, and respiratory rate, and compares them with baseline physiological data. When the deviation of the real-time physiological data from the baseline physiological data exceeds a preset deviation threshold, the display shows an alarm message through color change and / or flashing, indicating the need for fluid filling. At this time, the controller sends a signal to instruct the pressure regulator 8 to fill the bags in various parts of the anti-G suit with fluid. The fluid is guided into the fluid filling channels of each bag through the filling pipes 7. During the filling process, the bags gradually expand under the constraint of the outer material, and the pressure is evenly distributed within the bags, thereby gradually restoring the monitored human vital signs to the preset safe range and improving the astronauts' tolerance to acceleration overload.

[0043] When all of the astronaut's physiological data return to a safe range and remain so for a preset time, the controller stops further fluid filling or draining adjustments, and the system enters a maintenance state. In an optional embodiment, the preset deviation threshold can be selected as a deviation of approximately 30% from the baseline physiological data, and the preset time can be approximately 1 minute. However, the present invention is not limited to these and can be adjusted according to different mission requirements.

[0044] When parameters such as heart rate, blood pressure, and respiratory rate exceed the upper limit of the safe range again, it indicates that the astronaut's workload has increased, and the system will restart the filling process to further regulate the pressure in each area. When the manned spacecraft approaches stable operation, if the wearer's physiological data is stable and remains within the safe range, the controller outputs a control signal to the one-way valve of the return port 6, causing the liquid to flow from the filling bag back to the storage device 9 through the return pipe. During the liquid discharge process, the pressure inside the bag gradually decreases. The depressurization rate can be a preset depressurization rate or adjusted according to the changing trend of real-time physiological data to avoid discomfort caused by sudden pressure changes.

[0045] Through the above process, the liquid pressurization system and physiological monitoring system achieve comprehensive adjustment and monitoring of the astronauts, ensuring that the astronauts remain within the preset physiological safety range during mission execution and reducing the burden of overload environments on their bodies. The self-adjusting liquid-filled anti-G suit described in this invention can flexibly cope with different overload conditions, improving wearing comfort and system reliability while ensuring anti-G effectiveness.

[0046] This article uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. For those skilled in the art, various modifications, equivalent substitutions and improvements made to the specific implementation methods and application scope without departing from the spirit and scope of the claims should fall within the protection scope of the present invention.

Claims

1. A self-adjusting liquid-filled aerospace anti-G suit, characterized in that, include: The anti-G suit body includes an upper garment for covering the astronaut's torso and trousers for covering the lower limbs. Both the upper garment and trousers adopt a double-layer structure with an inner and outer layer. A liquid-filled cavity is formed between the inner and outer layers, extending continuously along the chest, waist, abdomen, thighs and calves. Several liquid-filled sacs corresponding to different areas are set in the liquid-filled cavity. The liquid pressurization system includes a liquid storage device disposed on the side of the spacecraft seat, a liquid filling pipe connected to the liquid storage device and arranged along the torso and lower limbs, a pressure regulator disposed between the liquid storage device and the liquid filling pipe, and a return port disposed at the hem of the anti-G suit and connected to the liquid storage device through a one-way fluid valve. The liquid filling pipe is connected to each of the liquid filling bags through branch pipes, and the cross-sectional area of ​​the tube corresponding to the chest, waist and abdomen, thigh and calf decreases sequentially from the torso to the lower limbs, so as to form a liquid pressure that varies along the longitudinal direction of the human body between the liquid filling bags in different areas. A physiological monitoring system, comprising at least one sensor for acquiring physiological data in electrocardiogram, blood pressure and respiratory rate, and a display for displaying physiological data and the working status of anti-G suit; The controller, which is electrically connected to the pressure regulator, the physiological monitoring system, and the one-way fluid valve, is configured to: acquire and store the astronaut's baseline physiological data under standard Earth gravity conditions; and, under overload conditions, determine whether the physiological load exceeds a preset threshold based on the deviation between the real-time physiological data and the baseline physiological data. If the load exceeds a preset threshold, the controller controls the pressure regulator to inject liquid from the liquid storage device into the filling bag of the target area through the filling pipe. If the load does not exceed a preset threshold or returns to a safe range and remains so for a preset time, the controller controls the opening of the return port to allow the liquid in the filling bag to flow back to the liquid storage device, thereby reducing the liquid pressure in the anti-G suit.

2. The anti-G suit according to claim 1, characterized in that, The design of the anti-G suit body is based on the ergonomic parameters of astronauts aged 40 to 50. The top and pants are connected at the elbow and knee joints by narrow outer side passages to ensure joint movement while maintaining the continuity of the fluid filling chamber. The inner layer is composed of antistatic treated cotton fabric and a rubber water-air-tight layer, and the outer layer is made of high-strength, low-elongation fabric with a heat insulation layer.

3. The anti-G suit according to claim 1, characterized in that, The liquid storage device is installed in the storage module on the side of the spacecraft seat, and is made of high-strength, pressure-resistant, and flexible material with a volume of 2.0L to 3.0L; the wall thickness of the filling pipe is 0.5mm. 1.5mm.

4. The anti-G suit according to claim 1, characterized in that, The fluid-filled bags are distributed in the chest, waist, abdomen, thighs and calves. Each fluid-filled bag consists of multiple fluid-filled chambers that are separated from each other. Each fluid-filled chamber is connected to a corresponding branch pipeline through an independent fluid inlet channel, so as to realize independent adjustment of the fluid pressure in each part and improve the uniformity of pressure distribution.

5. The anti-G suit according to claim 1, characterized in that, The physiological monitoring system includes an electrocardiogram (ECG) sensor, a cuff-type blood pressure monitor, and a respiration sensor. The ECG sensor is attached to the astronaut's chest and sandwiched between the inner layer of the anti-G suit and the skin. The cuff-type blood pressure monitor is fixed to the upper arm, and the respiration sensor is fixed to the chest via a chest strap.

6. The anti-G suit according to claim 1 or 5, characterized in that, The display is used to show real-time physiological data. When the deviation of the real-time physiological data from the baseline physiological data exceeds a first preset deviation threshold, the display will issue a prompt by changing the color and / or flashing to remind the user to adjust the fluid filling.

7. The anti-G suit according to claim 1, characterized in that, The pressure regulator, under the control of the controller, adjusts the liquid flow rate and / or pressure in each branch pipeline to form different pressure change gradients according to the target pressure and real-time physiological data changes in different areas.

8. The anti-G suit according to claim 1, characterized in that, The one-way fluid valve only allows liquid to flow from the filling bag to the liquid storage device. During the depressurization process, the controller sets the reflux opening time and depressurization rate according to the changing trend of real-time physiological data, so that the liquid pressure in the anti-G suit gradually decreases.

9. A method for regulating a self-adjusting liquid-filled aerospace anti-G suit as described in claim 1, characterized in that, include: Under standard Earth gravity conditions, physiological data of astronauts are collected using a physiological monitoring system and baseline physiological data are calculated and stored by a controller. Under overload conditions, physiological data is collected in real time and the deviation is obtained by comparing it with the baseline physiological data by the controller. When the physiological load reflected by the deviation exceeds the preset threshold, the pressure regulator is controlled to inject liquid from the liquid storage device into the filling bags of each area through the filling pipe, so that the chest, waist and abdomen, thigh and calf areas form a liquid pressure distribution that varies along the longitudinal direction of the human body. When real-time physiological data is within a safe range and remains within a preset time, the reflux port is opened. The liquid in the filling bag is returned to the liquid storage device through the return port, gradually reducing the liquid pressure in the anti-G suit.

10. The method according to claim 9, characterized in that, The preset threshold is the percentage deviation range of the baseline physiological data, the safe range is determined by the baseline physiological data and medical parameters, and the process of gradually reducing the liquid pressure is carried out in stages by controlling the depressurization rate.

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