A pilot load-bearing neck and waist protection system and protection method

Abstract

The invention discloses a pilot load-bearing cervical and lumbar protection system and a protection method. A pilot load-bearing cervical and lumbar protection system comprises a pilot seat and a helmet. The pilot obtains CT data of various parts of the body through a CT machine. The CT data of various parts of the body are processed by Mimics software and three-dimensional finite element models of various parts of the human body are established by ANSYS Workbenc software. The pilot weight information and the pilot body flight posture information obtained by a pressure sensor are adapted to the helmet, and a chinrest forehead bearing device, a helmet support device, a helmet movement track, a shoulder and chest moving device, a waist and abdomen sacral support device and a chest and abdomen limiting device are installed on the pilot seat. The invention realizes the simulation recording of the pilot's body posture, eliminates the pressure on the pilot's neck and waist under high G load, can maintain the pilot's sitting posture and can effectively eliminate the high G load of the pilot's cervical and lumbar spine, so as to reduce the incidence of cervical spondylosis of flight personnel.

Description

Technical Field

[0001] The invention relates to the technical field of flight seat equipment, and in particular to a pilot load-bearing neck and waist protection system and a protection method. Background Art

[0002] The high incidence of cervical and lumbar spondylosis among high-performance fighter pilots is the primary reason for the grounding of fighter pilots in my country. High G loads during flight (including takeoff, landing, aerial maneuvers and ejection) and the forward tilt of the pilot's posture (especially when the carrier-based aircraft is landing on the arresting cable) are the main causes of cervical and lumbar spondylosis. At present, the main methods adopted at home and abroad are to reduce the weight of pilot helmets, increase the angle of pilot seats, and train pilot neck and waist muscles and high G loads in order to reduce the incidence of pilot cervical and lumbar diseases, but the effect is not obvious. The pilot seat has little effect on reducing the high G load of the cervical and lumbar spine and maintaining the pilot's sitting posture. Therefore, it is urgent to design a pilot load-bearing cervical and lumbar protection system and protection method to solve the high incidence of existing pilot cervical and lumbar diseases and the inability to eliminate the pressure of high G load on the pilot's cervical and lumbar spine. Summary of the invention

[0003] In view of the problems existing in the prior art, the object of the present invention is to provide a pilot load-bearing neck and waist protection system and protection method.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a pilot load-bearing cervical and lumbar protection system, comprising a pilot seat, a helmet, a chin-rest forehead bearing device, a helmet support device, a helmet movement track, a shoulder-chest moving device, a waist-abdomen-sacral support device, and a chest-abdomen limiting device. The chin-rest forehead bearing device is installed on the lower periphery and inside of the helmet. The chin-rest forehead bearing device is installed inside the helmet and is used to support the forehead, temporal, occipital and chin of the head in the helmet. The helmet support device is connected to the lower part of the helmet and at the neck position to assist in supporting the head and eliminate neck pressure. A helmet movement track is provided behind the helmet and on the pilot seat. The helmet is slidably connected in the helmet movement track to limit the movement of the helmet.

[0005] The lower part of the helmet motion track is rigidly connected to the rear part of the chest and abdomen limit device for adjusting the overall sitting posture. The chest and abdomen limit device is equipped with a lumbar sacral belt for fixing the lumbar sacrum. The lumbar sacral belt is installed on the lumbar and abdomen support device for assisting lumbar scoliosis. The lumbar and abdomen support device is installed on the pilot seat.

[0006] A shoulder-chest moving device is installed on the pilot seat and on the upper part of the waist-abdomen-sacral supporting device for moving the shoulders up and down, and a shoulder-chest strap restrained on the shoulders and chest is installed on the shoulder-chest moving device.

[0007] Specifically, a pressure sensor is installed at the pilot seat hip position for identifying the pilot's weight.

[0008] Specifically, the pilot obtains CT data of various parts of the body through a CT machine, the CT data of various parts of the body are processed by Mimics software and three-dimensional finite element models of various parts of the human body are established by ANSYS Workbenc software, the pilot weight information and the pilot's body flight posture information obtained by the pressure sensor are adapted to the helmet, and a chinrest forehead bearing device, a helmet support device, a helmet movement track, a shoulder and chest moving device, a waist and abdomen sacrum support device and a chest and abdomen limit device are installed on the pilot seat.

[0009] Specifically, the helmet support device is provided with a counterweight block and a hydraulic support rod. The bottom of the hydraulic support rod is installed on the neck protection ring, and the top of the hydraulic rod is installed on the lower part of the helmet for supporting the helmet. A gravity acceleration sensor is installed on the neck protection ring. The gravity acceleration sensor is electrically connected to the microcomputer control system for identifying the pilot's flight acceleration and controlling the lifting and lowering of the hydraulic support rod.

[0010] Specifically, the shoulder and chest moving device is provided with a counterweight block 2 and a stepless variable gearbox, which is connected to a microcomputer control system and is used to collect the pilot's weight information from a pressure sensor and control the stepless variable gearbox to move the shoulder and chest up and down through the microcomputer control system.

[0011] Specifically, the chin-rest forehead bearing device is provided with a moving space of 5-7 mm on the lower side of the interior of the helmet, which is used for the mandible to move up and down for breathing and speaking.

[0012] A protection method for a pilot load-bearing neck and waist protection system comprises the following steps:

[0013] 1) Establish a three-dimensional finite element model of a person:

[0014] First, CT data of people in upright state, sitting state, neck rotation, waist rotation, neck scoliosis, waist scoliosis, head lifting and downward movement, and head, neck and waist combined movement are obtained in the CT machine. Then, Mimics software is used to process the human CT data to generate three-dimensional images. Finally, ANSYS ICEM CFD software is used to generate meshes, and finite element modeling is performed using ANSYS Workbench software.

[0015] 2) The three-dimensional finite element model simulates the pilot's trunk rotation, neck rotation, neck scoliosis, head lifting movements, and the pilot's lumbar and cervical spine compound movements. The three-dimensional finite element model is modified based on the CT data of different human postures, and the movement trajectory of the head, shoulders and chest of the human body in various postures is recorded;

[0016] 3) According to the movement trajectory of the head, shoulder and chest of the human body in various postures formed by the three-dimensional finite element model, a chin-rest forehead bearing device, a helmet support device, a helmet movement track, a shoulder-chest moving device, a waist-abdomen-sacral support device and a chest-abdomen limit device are formulated and installed on the pilot seat;

[0017] 4) The pilot sits in the pilot's seat in a relaxed position and performs the following actions: neck rotation, side bending and head tilt; neck compound actions; neck + waist compound actions, and records the movement trajectory of the helmet, formulates the movement trajectory of the helmet, and sends a signal to the microcomputer control system through the pressure sensor on the hip. According to the pilot's weight, the force of the hydraulic support rod is adjusted, and under the action of the counterweight, the helmet supports the pilot's head. During the flight, the gravity acceleration sensor controls the hydraulic support rod through the microcomputer control system, and under the action of the counterweight, the pressure on the neck is eliminated by supporting the head;

[0018] 5) The pressure sensor under the buttocks of the pilot sitting on the pilot's seat sends a signal to the microcomputer control system, which adjusts the stepless variable gearbox according to the pilot's weight, and tightens the shoulders and chest under the action of the second counterweight. During the flight, the pressure sensor under the buttocks senses the pressure, and the microcomputer control system adjusts the stepless variable gearbox. Under the action of the second counterweight, the buttocks pressure is maintained at a resting state by lifting the shoulders and chest;

[0019] 6) The forward leaning posture of the pilot during flight can cause a surge in the stress on the cervical and lumbar spine. The helmet support device and lumbar belt can be used to keep the head and lumbar spine in an upright sitting position. The chest and abdomen forward leaning limit device can further effectively control the pilot's overall sitting posture. The lumbar joint and hydraulic support can effectively unload the load without affecting the lumbar scoliosis of the pilot.

[0020] The present invention has the following beneficial effects:

[0021] The pilot load-bearing cervical and lumbar protection system and protection method designed by the present invention are based on the existing ejection seat and the existing pilot helmet, and are equipped with a chinrest forehead bearing device, a helmet supporting device, a helmet movement track, a shoulder and chest moving device, a lumbar and sacral supporting device, and a thorax and abdomen limiting device, so as to achieve simulated recording of the pilot's body posture, eliminate the pressure on the pilot's neck and waist under high G load, maintain the pilot's sitting posture, and effectively eliminate the high G load on the pilot's cervical and lumbar spine, so as to reduce the incidence of cervical spondylosis in flight personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the pilot load-bearing neck and waist protection system.

[0023] Figure 2It is a flow chart of the pilot load bearing neck and waist protection method.

[0024] Figure 3 Is a graph of material properties used in 3D finite element models.

[0025] In the figure: 1-chin-rest forehead bearing device; 2-helmet supporting device; 3-shoulder-chest strap; 4-shoulder-chest moving device; 5-lumbar-abdominal-sacral supporting device; 6-lumbar-sacral strap; 7-chest-abdominal limiting device; 8-helmet movement track; 9-pilot seat; 10-helmet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] like Figure 1-2 As shown, a pilot load-bearing cervical and lumbar protection system includes a pilot seat 9, a helmet 10, a chin-rest forehead bearing device 1, a helmet supporting device 2, a helmet moving track 8, a shoulder-chest strap 3, a shoulder-chest moving device 4, a waist-abdomen-sacral supporting device 5, and a chest-abdomen limiting device 7. A pressure sensor is installed at the buttocks position of the pilot seat 9 for identifying the weight of the pilot.

[0028] A chin-rest forehead support device 1 is installed on the lower periphery and inside of the helmet 10. The chin-rest forehead support device 1 is installed inside the helmet 10 and is used to support the forehead, temporal, occipital and chin of the head inside the helmet 10. The chin-rest forehead support device 1 is provided with a moving space of 5-7 mm on the lower side inside the helmet for the mandible to move up and down for breathing and speaking.

[0029] A helmet support device 2 is connected to the lower part of the helmet 10 and at the neck position, which is used to assist in supporting the head and eliminating neck pressure. The helmet support device 2 is provided with a counterweight block and a hydraulic support rod. The bottom of the hydraulic support rod is installed on the neck protection ring, and the top of the hydraulic rod is installed on the lower part of the helmet 10, which is used to support the helmet 10. A gravity acceleration sensor is installed on the neck protection ring. The gravity acceleration sensor is electrically connected to the microcomputer control system, which is used to identify the pilot's flight acceleration and control the lifting and lowering of the hydraulic support rod. A helmet movement track 8 is provided behind the helmet 10 and on the pilot seat 9. The helmet 10 is slidably connected in the helmet movement track 8 to limit the movement of the helmet 10.

[0030] The lower part of the helmet movement track 8 is rigidly connected to the rear part of the chest and abdomen limit device 7 for adjusting the overall sitting posture. The chest and abdomen limit device 7 is equipped with a lumbar-sacral belt 6 for fixing the lumbar sacrum. The lumbar-sacral belt 6 is installed on the lumbar-abdominal-sacral support device 5 for assisting lumbar scoliosis. The lumbar-abdominal-sacral support device 5 is installed on the pilot seat 9.

[0031] A shoulder-chest moving device 4 is installed on the pilot seat 9 and on the upper part of the waist-abdomen-sacral supporting device 5, which is used for the up-and-down movement of the shoulder, and a shoulder-chest strap 3 is installed on the shoulder-chest moving device 4 to be bound to the shoulder. The shoulder-chest moving device 4 is provided with a counterweight block 2 and a stepless gearbox, which is connected to a microcomputer control system and is used to control the stepless gearbox to move the shoulder up-and-down through the microcomputer control system according to the pilot weight information collected by the pressure sensor.

[0032] The pilot obtains CT data of various parts of the body through a CT machine, which are processed by Mimics software and a three-dimensional finite element model of various parts of the human body is established by ANSYS Workbenc software. The pilot's weight information and the pilot's body flight posture information obtained by the pressure sensor are adapted to the helmet and a chinrest forehead bearing device 1, a helmet supporting device 2, a helmet movement track 8, a shoulder and chest moving device 4, a waist and abdomen sacral supporting device 5 and a chest and abdomen limiting device 7 are installed on the pilot's seat.

[0033] An embodiment of the present invention: A protection method for a pilot load-bearing neck and waist protection system comprises the following steps:

[0034] 1. Establishment of human three-dimensional finite element model

[0035] 1.1 Human CT data acquisition

[0036] In the super-large CT machine, CT data are obtained when a person is in an upright state, sitting state, neck rotation, waist rotation, neck scoliosis, waist scoliosis, head lifting and downward movement, and combined movement of the head, neck and waist.

[0037] 1.2 Establishment of three-dimensional finite element models of various parts of the human body

[0038] Mimics 19.0 software was used to process human CT data, and three-dimensional images were generated for the skin, subcutaneous tissue, muscle (target muscle), bone (including skull, maxilla, mandible, spine, scapula, humerus, sacroiliac bone, femur, etc.), and intervertebral disc. ANSYS ICEM CFD was then used to generate meshes, and finally finite element modeling was performed using ANSYS Workbench 18.0 software.

[0039] The vertebrae are divided into cancellous bone, cortical bone and accessory structures. The elastic modulus of cancellous bone and accessory structures is calculated by studying the relationship between the Hounsfield value of the bone CT image and its elastic modulus E. The elastic model of cancellous bone is determined based on the gray value of CT, and the formula is as follows: ρapp=(0.56CT+72) / 1000with R2=0.80(1), E=1890ρapp1.92 with R2=0.702(2); The cortical bone of the vertebral accessory structure is thinner and the material properties are also complex. According to the empirical formula: ρapp=(0.85CT+64) / 1000with R2=0.80(3), E=4730ρapp 1.56with R2=0.73(4); where ρapp and E are the apparent density and elastic modulus of human bone tissue at a certain point in the CT image, respectively, in units of g / cm 3 and MPa, CT is the CT value of the point, and R2 is the correlation coefficient.

[0040] According to formulas (1-2) and (3-4), taking L4 as an example, the Hounsfield values ​​of the vertebral cancellous bone and accessory structures from top to bottom were measured, and the average value of the CT number in each section was taken. The average value of the E value of the five sections was used as the material parameters of the cancellous bone and accessory structure in the finite element calculation. The E value of the vertebral cancellous bone is 106MPa; the elastic modulus of the accessory structure is 3132MPa, which is slightly lower than the value of 3500MPa used in the current literature for the vertebral accessory structure. The remaining materials are the material property diagrams used, as shown in Table 3.

[0041] Establish three-dimensional finite element models of the head and face, neck, shoulder, chest, waist, sacrum, hip joint, and thigh. The head and face include skin, skull, maxilla, mandible, teeth, and temporomandibular joint (including articular disc). The neck includes cervical vertebrae + intervertebral disc + cervical ligament. The shoulder and chest include thoracic vertebrae, intervertebral disc, thoracic ligament, ribs, scapula, humerus, upper limb girdle muscles, pectoralis major, latissimus dorsi, trapezius, etc. The waist includes lumbar vertebrae, intervertebral disc, and lumbar ligament. The sacrum, hip joint, and thigh include sacral vertebrae, ilium, hip joint, femur, psoas major, gluteus maximus, gluteus minimus, gluteus medius, biceps femoris, semimembranosus and semitendinosus, adductor muscles, rectus femoris, etc.

[0042] 1.3 Motion simulation and verification

[0043] The three-dimensional finite element simulation includes the pilot's trunk rotation (lumbar spine), neck rotation (cervical spine), neck scoliosis, and head lifting movements; the pilot's lumbar and cervical spine compound movements are simulated. The finite element model is modified based on the CT data of different human postures. The movement trajectory of the head, shoulders, and chest of the human body in various postures is recorded.

[0044] 2. Chin-rest forehead bearing device 1

[0045] At present, the chin of the pilot helmet 10 has no support. Based on the three-dimensional finite element model of the head, the effects of different designs on the stress on the teeth and the alveolar process are analyzed, and the requirements are set as follows: 1) The forehead, temporal, occipital and chin of the helmet 10 have a supporting effect on the head; 2) The mandible moves downward 5-7mm without affecting breathing and speaking; 3) The chin support part is easy to disassemble and assemble from the existing helmet 10 as a whole.

[0046] 3. Helmet motion track 8 and helmet support device 2

[0047] 3.1 Helmet Movement Track 8

[0048] In order to ensure that the pilot's head movement is not restricted and to effectively eliminate the pressure of high G load and posture on the cervical spine, the helmet movement track 8 is very important. The pilot maintains a relaxed sitting position and performs the following actions: 1) neck rotation, side bending and head tilt; 2) neck compound movements; 3) neck + waist compound movements. The movement track of the helmet is recorded.

[0049] The above actions are simulated on the 3D finite element model and corrected according to the human body movements. The helmet motion track 8 is designed and installed on the pilot seat 9. The high G state is simulated and the 3D finite element analysis is performed to determine whether the track design is reasonable.

[0050] 3.2 Helmet support device 2

[0051] The helmet support device 2 includes a counterweight block 1, a hydraulic support rod, a gravity acceleration sensor, and a microcomputer control system. After the pilot enters the cockpit, the pressure sensor under the buttocks sends a signal to the microcomputer control system, which adjusts the force of the hydraulic support rod according to the pilot's weight, so that the helmet 10 supports the pilot's head under the action of the counterweight block 1. During the flight, the gravity acceleration sensor controls the hydraulic support rod through the microcomputer, and under the action of the counterweight block 1, the head is supported to eliminate the neck pressure.

[0052] 4. Shoulder-chest strap 3 and shoulder-chest moving device 4

[0053] 4.1 Shoulder and chest strap 3

[0054] On the three-dimensional finite element model, the stress conditions of various parts under different load conditions are analyzed (first assuming that the shoulder and chest strap 3 is made of a uniform material that fits closely to the skin), and the design of the shoulder and chest strap 3 is guided, and the stress conditions of the shoulder and chest under different strap designs are analyzed.

[0055] 4.2 Preparation of shoulder-chest movement device

[0056] The shoulder-chest strap 3 is fixed on the shoulder-chest moving device 4. The shoulder can move up and down. In order to effectively eliminate the pressure of the head, neck and chest on the lumbar spine in the high-G state, the shoulder must have a moving device to prevent the shoulder from moving (in the high-G state, although the pilot can resist the shoulder movement through muscle contraction, when the high-G state is greater than the pilot's muscle contraction force, the shoulder can move).

[0057] The shoulder-chest moving device 4 includes a counterweight block 2, a stepless variable diameter (torque) gearbox, a pressure sensor, and a microcomputer control system. After the pilot enters the cockpit, the pressure sensor under the buttocks sends a signal to the microcomputer control system, and the stepless variable diameter gearbox is adjusted according to the pilot's weight. Under the action of the counterweight block 2, the shoulder-chest is tightened. During the flight, the sensor under the buttocks senses the pressure, and the stepless variable diameter gearbox is adjusted by the microcomputer. Under the action of the counterweight block 2, the buttocks pressure is maintained at a resting state by lifting the shoulder-chest.

[0058] 5. Lumbar, abdominal and sacral support device 5 (lumbar hydraulic support)

[0059] The forward leaning posture of the pilot during flight can cause a surge in the stress on the cervical and lumbar spine. The helmet support device 2 and the lumbar belt 6 can keep the head and lumbar spine in an upright sitting position. With the help of the chest and abdomen forward tilt limiter, the overall sitting posture of the pilot can be further effectively controlled; through the waist joint and hydraulic support, the lumbar scoliosis of the pilot is not affected under the premise of effectively unloading the load.

[0060] The three-dimensional finite element model is used to analyze the stress conditions of the chest and abdomen under different load conditions (assuming that the lumbar belt 6 is made of a uniform material close to the skin), and to provide guidance for the installation of the chest and abdomen limit device 7.

[0061] The chest and abdomen limit device 7 is rigidly connected to the helmet movement track 8; after being connected to the bottom of the pilot seat 9, the waist lateral bending is achieved through the waist joint, and the load bearing is achieved through the hydraulic device.

[0062] 6. Pilot seat function verification

[0063] In a simulated high-G state or on a training aircraft, the function of the pilot seat 9 is verified by a dummy. The pilot is equipped with this equipment and verifies the device during flight. It can realize the simulated recording of the pilot's body posture, eliminate the pressure on the pilot's neck and waist under high-G load, maintain the pilot's sitting posture and effectively eliminate the high-G load on the pilot's cervical and lumbar spine, so as to reduce the incidence of cervical spondylosis in flight personnel.

[0064] The present invention is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the enlightenment of the present invention, and all those having the same or similar technical solutions as the present invention fall within the protection scope of the present invention.

[0065] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A protection method for a pilot load-bearing neck and waist protection system, It is characterized in that The pilot load-bearing cervical and lumbar protection system comprises a pilot seat, a helmet, a chin-rest forehead bearing device, a helmet support device, a helmet movement track, a shoulder-chest moving device, a waist-abdomen-sacral support device, and a chest-abdomen limiting device. A chin-rest forehead bearing device is installed on the lower periphery and inside of the helmet. The chin-rest forehead bearing device is installed inside the helmet and is used to support the forehead, temporal, occipital and chin of the head. A helmet support device is connected to the lower part of the helmet and at the neck position to assist in supporting the head and eliminate neck pressure. A helmet movement track is provided behind the helmet and on the pilot seat. The helmet is slidably connected in the helmet movement track to limit the movement of the helmet. The lower part of the helmet motion track is rigidly connected to the rear part of the chest and abdomen limit device for adjusting the overall sitting posture. The chest and abdomen limit device is equipped with a lumbar sacral belt for fixing the lumbar sacrum. The lumbar sacral belt is installed on the lumbar and abdomen support device for assisting lumbar scoliosis. The lumbar and abdomen support device is installed on the pilot seat. A shoulder-chest moving device is installed on the pilot seat and on the upper part of the waist-abdomen-sacral supporting device, which is used for the up and down movement of the shoulder, and a shoulder-chest strap that is bound to the shoulder and chest is installed on the shoulder-chest moving device; The protection method of the pilot load-bearing neck and waist protection system comprises the following steps: 1) Establish a three-dimensional finite element model of a person: First, CT data of people in upright state, sitting state, neck rotation, waist rotation, neck scoliosis, waist scoliosis, head lifting and downward movement, and head, neck and waist combined movement are obtained in the CT machine. Then, Mimics software is used to process the human CT data to generate three-dimensional images. Finally, ANSYSICEM CFD software is used to generate meshes, and finite element modeling is performed through ANSYSWorkbench software. 2) The three-dimensional finite element model simulates the pilot's trunk rotation, neck rotation, neck scoliosis, head lifting movements, and the pilot's lumbar and cervical spine compound movements. The three-dimensional finite element model is modified based on the CT data of different human postures, and the movement trajectory of the head, shoulders and chest of the human body in various postures is recorded; 3) According to the movement trajectory of the head, shoulder and chest of the human body in various postures formed by the three-dimensional finite element model, a chin-rest forehead bearing device, a helmet support device, a helmet movement track, a shoulder-chest moving device, a waist-abdomen-sacral support device and a chest-abdomen limit device are formulated and installed on the pilot seat; 4) The pilot sits in the pilot's seat in a relaxed position and performs the following actions: neck rotation, side bending and head tilt; neck compound actions; neck + waist compound actions, and records the movement trajectory of the helmet, formulates the movement trajectory of the helmet, and sends a signal to the microcomputer control system through the pressure sensor on the hip. According to the pilot's weight, the force of the hydraulic support rod is adjusted, and under the action of the counterweight, the helmet supports the pilot's head. During the flight, the gravity acceleration sensor controls the hydraulic support rod through the microcomputer control system, and under the action of the counterweight, the pressure on the neck is eliminated by supporting the head; 5) The pressure sensor under the buttocks of the pilot sitting on the pilot's seat sends a signal to the microcomputer control system, which adjusts the stepless variable gearbox according to the pilot's weight, and tightens the shoulders and chest under the action of the second counterweight. During the flight, the pressure sensor under the buttocks senses the pressure, and the microcomputer control system adjusts the stepless variable gearbox. Under the action of the second counterweight, the buttocks pressure is maintained at a resting state by lifting the shoulders and chest; 6) The forward leaning posture of the pilot during flight can cause a surge in the stress on the cervical and lumbar spine. The helmet support device and lumbar belt can be used to keep the head and lumbar spine in an upright sitting position. The chest and abdomen forward leaning limit device can further effectively control the pilot's overall sitting posture. The lumbar joint and hydraulic support can effectively unload the load without affecting the lumbar scoliosis of the pilot.

2. The protection method of the pilot load-bearing neck and waist protection system according to claim 1, It is characterized in that A pressure sensor is installed at the pilot seat hip position for identifying the pilot's weight.

3. The protection method of the pilot load-bearing neck and waist protection system according to claim 2, It is characterized in that The pilot obtains CT data of various parts of the body through a CT machine, the CT data of various parts of the body are processed through Mimics software and a three-dimensional finite element model of various parts of the human body is established through ANSYS Workbenc software, the pilot weight information and the pilot's body flight posture information obtained by the pressure sensor are adapted to the helmet, and a chinrest forehead bearing device, a helmet supporting device, a helmet movement track, a shoulder and chest moving device, a waist and abdomen sacral supporting device and a chest and abdomen limiting device are installed on the pilot seat.

4. The protection method of the pilot load-bearing neck and waist protection system according to claim 3, It is characterized in that The helmet support device is provided with a counterweight block and a hydraulic support rod. The bottom of the hydraulic support rod is installed on the neck protection ring, and the top of the hydraulic rod is installed on the lower part of the helmet for supporting the helmet. A gravity acceleration sensor is installed on the neck protection ring. The gravity acceleration sensor is electrically connected to the microcomputer control system for identifying the pilot's flight acceleration and controlling the lifting and lowering of the hydraulic support rod.

5. The protection method of the pilot load-bearing neck and waist protection system according to claim 3, It is characterized in that The shoulder-chest moving device is provided with a counterweight block 2 and a stepless variable gearbox, which is connected to a microcomputer control system and is used to collect pilot weight information from a pressure sensor and control the stepless variable gearbox to move the shoulder-chest up and down through the microcomputer control system.

6. The protection method of the pilot load-bearing neck and waist protection system according to claim 3, It is characterized in that The chin-rest forehead bearing device is provided with a moving space of 5-7 mm on the lower side of the inner part of the helmet, which is used for the mandible to move up and down for breathing and speaking.

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