A smart lumbar support system

Abstract

This invention provides an intelligent lumbar support system, relating to the field of lumbar support belt technology. The system includes a belt body comprising an inner skin-adhesive layer and an outer restraint layer from the inside out. The inner skin-adhesive layer is used to adhere to the human skin, and the outer restraint layer is used to wrap around and fix the human waist. An integrated space is formed between the inner skin-adhesive layer and the outer restraint layer. Two sets of airbag arrays are installed within this integrated space, symmetrically arranged relative to the center of the belt body. Each airbag array has at least one airbag, which is elongated and cylindrical. When the belt body wraps around and fixes the human waist, the airbags are vertically arranged and abut against the waist through their peripheral walls. By controlling the inflation and deflation of the airbags, the support stiffness and pressure distribution of the lumbar support can be dynamically adjusted. When the human body is in a healthy posture, it maintains low stiffness, allowing muscles to exert force autonomously. When an instability risk is detected, it rapidly inflates to provide enhanced support, thereby avoiding long-term rigid restraint.

Description

Technical Field

[0001] This invention belongs to the field of lumbar support belt technology, specifically, it relates to an intelligent lumbar support system. Background Technology

[0002] Degenerative spinal diseases and acute lumbar muscle strain are common orthopedic conditions, with particularly high incidence rates among individuals working in special environments, such as professional drivers, those engaged in heavy physical labor, those working at desks for extended periods, and patients in the postoperative recovery period. For example, long-haul truck drivers, whose lower backs are constantly in a fixed sitting posture and subjected to continuous vibrations transmitted from vehicle bumps, are highly susceptible to degeneration of the intervertebral discs and facet joints. Construction workers and porters, due to frequent bending and heavy lifting, have a significantly increased risk of acute lumbar muscle strain. For these groups, wearing a lumbar brace is an important means of conservative treatment and postoperative rehabilitation.

[0003] Currently available and commercially available traditional lumbar braces generally suffer from the following significant drawbacks: They offer passive and simplistic support. Most products rely on fixed-rigidity plastic plates, steel plates, or spring strips embedded within the lumbar support to provide rigid, passive physical support. They lack the ability to dynamically adjust the support intensity based on changes in patient posture (such as bending, extension, or lateral flexion) or different stages of rehabilitation. Prolonged wear of rigid braces can lead to disuse atrophy and decreased muscle strength due to excessive restriction of lumbar movement and lack of normal contraction and relaxation of the back muscles, ultimately weakening the dynamic stability of the spine. From a Traditional Chinese Medicine perspective, long-term restriction of local Qi and blood can cause "Qi and blood stagnation and malnourishment of tendons and bones." Patients often experience increased stiffness and muscle tightness after wearing the brace; once removed, the pain and limited mobility are even worse than before wearing it, creating a vicious cycle of "the more you wear it, the weaker you become." Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent lumbar support system that solves the technical problem in related technologies where patients who wear rigid braces for a long time experience excessive restriction of lumbar movement, resulting in a lack of normal contraction and relaxation of the lumbar and back muscles, which easily leads to disuse atrophy, decreased muscle strength, and weakened dynamic stability of the spine.

[0005] At least one embodiment of the present invention provides an intelligent waist support system, comprising: a waist belt body, the waist belt body comprising an inner skin-adhering layer and an outer binding layer from the inside out, the inner skin-adhering layer being used to adhere to human skin, the outer binding layer being used to wrap around and fix human waist, and an integrated space being formed between the inner skin-adhering layer and the outer binding layer. The integrated space is equipped with two sets of airbag arrays, which are symmetrically arranged relative to the middle of the waist belt body. Each set of airbag arrays has at least one airbag, which is a long column shape. When the waist belt body is wrapped around and fixed to the waist of the human body, the airbag is arranged vertically and abuts against the waist of the human body through the peripheral wall.

[0006] According to an exemplary embodiment of this disclosure, each airbag array includes an inner airbag for supporting the paraspinal muscle group region directly behind the back of the human body.

[0007] According to an exemplary embodiment of this disclosure, each airbag array further includes an external airbag located on the side of the inner airbag away from the middle of the waist belt body. The external airbag is used to support the external oblique and quadratus lumborum muscle regions of the human body.

[0008] According to an exemplary embodiment of this disclosure, each airbag array further includes a central airbag located between the outer airbags and the inner airbags, the central airbag being used to support the erector spinae muscle belly region of the human back.

[0009] According to an exemplary embodiment of this disclosure, the diameter of the inner airbag is 15mm to 25mm, the diameter of the middle airbag is 35mm to 50mm, and the diameter of the outer airbag is 25mm to 35mm.

[0010] According to an exemplary embodiment of this disclosure, an air pump and an air manifold connected to the air pump are also configured in the integrated space. The inner airbag, the middle airbag and the outer airbag are independent of each other and each extends a branch air passage from the bottom. Each branch air passage is connected to the air manifold.

[0011] According to an exemplary embodiment of this disclosure, the integrated space is also equipped with two electromyography (EMG) sensors, which are symmetrically distributed on both sides of the waist belt body to conform to the back muscles and collect surface EMG signals.

[0012] According to an exemplary embodiment of this disclosure, three inertial measurement units are vertically spaced along the centerline of the integrated space, corresponding to the projected positions of the spinous processes of the L1, L3, and L5 lumbar vertebrae of the human body, respectively. Each inertial measurement unit includes a three-axis accelerometer and a three-axis gyroscope, used to collect information on the linear acceleration, angular velocity, and attitude change of the lumbar vertebral segments in three-dimensional space, with a sampling frequency of 100Hz to 200Hz.

[0013] According to an exemplary embodiment of this disclosure, the two graphene heating films on the left and right sides correspond to the Shenshu acupoints on the left and right sides, respectively, and the graphene heating film in the middle corresponds to the Mingmen acupoint. The working temperature of the graphene heating film is 42℃~45℃. The integrated space is equipped with a vibration motor, which corresponds to the graphene heating film. The vibration frequency of the micro vibration motor is 5Hz to 15Hz.

[0014] According to an exemplary embodiment of this disclosure, a buffer liner is also provided in the integrated space. The buffer liner is a flexible pad with a thickness of 3mm to 8mm, which covers the periphery of the inertial measurement unit, the micro vibration motor and the circuit module to isolate the rigid device from direct contact with the human spinous process.

[0015] This invention provides an intelligent lumbar support system. The system's waistband body comprises, from the inside out, an inner skin-contact layer, an integrated space, and an outer restraint layer. The inner skin-contact layer is preferably made of a skin-friendly, breathable, sweat-wicking, and elastic composite fabric material, directly conforming to the skin of the waist and abdomen. The outer restraint layer preferably employs a Velcro two-way tightening structure or a BOA knob tie structure to secure the waistband body around the waist, providing basic restraint force. The integrated space formed between the inner skin-contact layer and the outer restraint layer is used to install various functional devices. Two sets of airbag arrays are installed within the integrated space. These two sets of airbag arrays are symmetrically arranged relative to the vertical central axis of the waistband body, corresponding to the left and right sides of the waist, respectively. Each airbag array includes at least one airbag, which is elongated and columnar. When the waistband body is secured around the waist, the airbags are vertically arranged, with their peripheral walls abutting against the soft tissue area of ​​the waist. By controlling the inflation and deflation of the airbags, the support stiffness and pressure distribution of the lumbar support can be dynamically adjusted. When the body is in a healthy posture, it maintains low stiffness to allow muscles to exert force autonomously, and when an instability risk is detected, it inflates quickly to provide enhanced support, thereby avoiding long-term rigid restraint. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art 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 based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an intelligent lumbar support system provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure of the inner skin-adhesive layer, the integrated space, and the outer binding layer.

[0018] In the diagram: 100, main body of the belt; 110, inner skin-contact layer; 120, integrated space; 130, outer binding layer; 200. Airbag array; 210. Inner airbag; 220. Middle airbag; 230. Outer airbag; 300. Air pump; 310. Main air line; 320. Branch air lines; 400. Electromyography sensor; 500. Inertial measurement unit; 600. Graphene heating film; 700. Buffer liner. Detailed Implementation

[0019] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure. For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this disclosure will be explained and described below.

[0020] It should be understood that the described embodiments are merely some, not all, of the embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0021] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be understood that the term "and / or" used in this article is merely a way of describing the logical relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Depending on the context, the word "if" as used here can be interpreted as "when" or "when" or "in response to determination" or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination" or "in response to determination" or "when detection (of the stated condition or event)" or "in response to detection (of the stated condition or event)."

[0024] It should be understood that the terms "first," "second," etc., used in this disclosure are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0025] In the description of this disclosure, the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this disclosure.

[0026] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0027] This application relates to an intelligent lumbar support system, primarily for use in scenarios requiring lumbar support and protection, such as professional driving, heavy physical labor, prolonged desk work, and postoperative rehabilitation. Taking long-haul truck drivers as an example, their lower backs are in a fixed sitting posture for extended periods and continuously subjected to vibrations transmitted from vehicle bumps, potentially leading to degenerative changes in the intervertebral discs and facet joints. Construction workers and porters, due to frequent bending and heavy lifting, have an increased risk of acute lumbar muscle strain. For these groups, traditional lumbar supports mostly use a fixed-rigidity steel or plastic plate embedded in the lumbar support to provide rigid passive support. However, during long drives, drivers need to make small adjustments to their lower back, such as flexion, extension, or lateral flexion, depending on road conditions. A fixed, rigid lumbar support excessively restricts these movements, causing the back muscles to be in a state of passive support for a long time, lacking normal contraction and relaxation kinetic stimulation, which may lead to disuse atrophy and affect the dynamic stability of the spine. Many drivers report that after wearing traditional lumbar supports for a period of time, the stiffness in their lower back worsens, and the pain and limited mobility are more pronounced after removing them compared to before wearing them.

[0028] To address the issues of traditional lumbar support being passive, not dynamically adjustable, and potentially causing muscle atrophy, such as... Figures 1-2 As shown, it illustrates an intelligent lumbar support system according to an embodiment of the present invention, such as Figure 1As shown, the system's waist belt body 100 comprises, from the inside out, an inner skin-contact layer 110, an integrated space 120, and an outer restraint layer 130. The inner skin-contact layer 110 is preferably made of a skin-friendly, breathable, sweat-wicking, and elastic composite fabric material, directly conforming to the skin of the waist and abdomen. The outer restraint layer 130 preferably employs a Velcro two-way tightening structure or a BOA knob tie structure to secure the waist belt body 100 around the waist, providing basic restraint force. The integrated space 120 formed between the inner skin-contact layer 110 and the outer restraint layer 130 is used to install various functional devices. Two sets of airbag arrays 200 are installed within the integrated space 120. These two sets of airbag arrays 200 are symmetrically arranged with respect to the vertical central axis of the waist belt body 100, corresponding to the left and right sides of the waist, respectively. Each airbag array 200 includes at least one airbag, which is elongated and cylindrical. When the waist belt body 100 is wrapped around and fixed to the waist, the airbags are arranged vertically, with their peripheral walls abutting against the soft tissue area of ​​the waist. By controlling the inflation and deflation of the airbags, the support stiffness and pressure distribution of the lumbar support can be dynamically adjusted. When the body is in a healthy posture, it maintains low stiffness to allow muscles to exert force autonomously, and when an instability risk is detected, it quickly inflates to provide enhanced support, thereby avoiding long-term rigid restraint.

[0029] Considering the differences in anatomical structure and stress requirements in different areas of the human lumbar region, this embodiment further refines each airbag array 200 into three independent airbags to provide more precise support: an inner airbag 210, a middle airbag 220, and an outer airbag 230. The inner airbag 210 is located on the side closest to the spine and is used to support the paraspinal muscle group area directly behind the back. During normal driving, the inner airbag 210 maintains low pressure, providing only gentle paraspinal contact without affecting normal flexion and extension of the spine. The middle airbag 220 is located between the inner airbag 210 and the outer airbag 230, corresponding to the erector spinae muscle belly area. This area bears a large load when bending over to lift heavy objects; therefore, the diameter of the middle airbag 220 is designed to be 35mm–50mm, with a larger volume to provide upward lifting force. The external airbag 230 is located on the side furthest from the spine, corresponding to the lateral lumbar region where the external oblique and quadratus lumborum muscles are located. Its main function is to help prevent lateral flexion instability of the lumbar spine. Considering the limited space in the lateral lumbar region, its diameter is designed to be 25mm–35mm. The inner airbag 210 has the smallest diameter, ranging from 15mm to 25mm, because it is close to the spinous process of the spine and the electromyographic electrodes. If the diameter were too large, it would compress the spine or the sensor. This gradient design from the inside out helps each airbag to provide support in its corresponding area while reducing mutual interference.

[0030] To achieve independent control of the three airbags, a miniature air pump 300 and an air manifold 310 connected to the air pump 300 are also configured within the integrated space 120. A branch air path 320 extends from the bottom of each airbag, and each branch air path 320 is connected to the air manifold 310. As an example, a solenoid valve assembly is installed at the connection between the air manifold 310 and the branch air paths 320. Each solenoid valve is a normally closed two-way valve, controlled by a PWM signal or high / low level output from the microcontroller. When an airbag needs to be inflated, the microcontroller opens the corresponding solenoid valve and starts the miniature air pump 300. Gas enters the airbag through the air manifold 310 and the branch air paths 320. Pressure sensors are installed in the air manifold 310 or inside the airbag to detect the air pressure value in real time. The microcontroller reads this pressure value through analog-to-digital conversion, compares it with a preset target pressure, and uses a PID algorithm or hysteresis comparison to control the air pump 300 and the solenoid valves to achieve closed-loop pressure regulation. When releasing air, the microcontroller shuts off the air pump 300 and opens the exhaust port of the solenoid valve, allowing the gas to be released from the air bag.

[0031] To acquire real-time information about the wearer's waist muscle status, this embodiment incorporates surface electromyography (SEMG) sensors 400 within the integrated space 120. Two SEMG sensors 400 are symmetrically distributed on both sides of the waistband body 100, corresponding to the muscle belly regions of the erector spinae or multifidus muscles on the left and right sides of the body. Each SEMG sensor 400 preferably employs a gel-free dry electrode and is preferably woven from conductive yarn, forming stable contact with the skin using pressure provided by the outer restraint layer 130. As an example, the microcontroller performs analog-to-digital conversion on the EMG signal at a sampling rate of 1000 Hz. To extract useful features from the raw signal, the microcontroller first runs a digital filter: a 4th-order Butterworth bandpass filter is used, with a passband of 20 Hz to 450 Hz to filter out skin motion artifacts and DC offset; then a 50 Hz notch filter is used, with a notch depth of -40 dB to remove power frequency interference. The filtered electromyographic (EMG) signal is processed through a sliding window with a length of 256 ms and a step size of 50 ms to calculate the root mean square (RMS) value as the muscle activation intensity. Simultaneously, the signal is segmented and subjected to a Fast Fourier Transform (FFT) to extract the median frequency. A decrease in median frequency is correlated with muscle fatigue. When the RMS value increases compensatorily and the median frequency decreases by more than 15% relative to the individual baseline, the microcontroller determines that the wearer is in a state of compensatory muscle fatigue. The individual baseline is automatically established upon initial wear by guiding the user to perform standard movements, such as standing relaxation.

[0032] In addition to muscle state monitoring, this embodiment also introduces direct measurement of spinal kinematics. Three inertial measurement units (IMUs) 500 are vertically spaced along the midline of the integrated space 120, corresponding to the surface projection positions of the spinous processes of the L1, L3, and L5 lumbar vertebrae, respectively. Each IMU 500 integrates a three-axis accelerometer and a three-axis gyroscope. Attitude calculation is performed by a sensor fusion algorithm built into the microcontroller. In a specific example, accelerometer data is used to calculate the static tilt angle through low-pass filtering and inverse trigonometric functions, while gyroscope data is used to calculate the dynamic angle through integration. The two are fused using complementary filtering with weighting coefficients of 0.98 / 0.02 or a Kalman filter to obtain the absolute pitch, roll, and yaw angles of each IMU 500 in three-dimensional space. The sampling frequency is set to 100Hz–200Hz. To estimate the relative angles between lumbar vertebral segments, such as the flexion-extension angle of L1 relative to L5, the microcontroller subtracts the calculated angle of the inertial measurement unit 500 at L5 from the calculated angle at L1 to obtain the relative angle between segments. Further, the microcontroller performs a differential operation on this relative angle value: subtracting the value from the previous sampling period from the current value and dividing by the sampling interval to obtain the relative angular velocity; the angular velocity is then differentially approximated to obtain the relative angular acceleration. When the absolute value of the relative angular acceleration between segments exceeds 800° / s² (this threshold is an example value) and persists for more than 10 ms, the microcontroller determines it as a high-risk action, such as rapid bending or lateral flexion, and immediately triggers rapid inflation of the airbag.

[0033] In terms of traditional Chinese medicine physiotherapy, to alleviate muscle fatigue, this embodiment includes three graphene heating films 600 and two micro-vibration motors on the inner side of the inner skin-adhesive layer 110. The left and right graphene heating films 600 correspond to the surface projection positions of the Shenshu acupoints on the left and right sides, respectively, while the graphene heating film 600 in the middle corresponds to the surface projection position of the Mingmen acupoint. In a specific example, the temperature control of the heating films is achieved by a microcontroller in conjunction with an NTC thermistor. The thermistor is in close contact with the surface of the heating films, and its resistance changes with temperature, which is converted into a voltage signal by a voltage divider circuit and read by an ADC. The microcontroller uses a PID algorithm to adjust the duty cycle of the output PWM, driving the MOSFET switching circuit to supply power to the heating films, stabilizing the temperature at a set value, such as 42℃~45℃. When the system identifies a compensatory state of muscle fatigue through the aforementioned electromyography and median frequency criteria, and no high-risk movements are detected, the microcontroller automatically starts the physiotherapy program: turning on the heating films and vibration motors, and controlling the motor drive chip to maintain the vibration frequency at 5Hz~15Hz via the PWM signal, which continues for 20 minutes before automatically stopping. If a high-risk posture is detected during physiotherapy, the microcontroller will first interrupt the physiotherapy and perform airbag inflation protection, and then resume the physiotherapy after the risk is eliminated.

[0034] As a concrete example, for the intelligent control of the airbags, the microcontroller integrates three information sources: electromyographic fatigue characteristics, the posture risk threshold of the inertial measurement unit 500, and the real-time posture angle range. During normal system operation, the microcontroller recalculates the state every 200ms. When all indicators are within the safe range, the system maintains a low-intervention mode: the airbags maintain a low pressure of 5kPa to 10kPa, providing only basic contact and allowing muscles to exert force autonomously. When the electromyographic fatigue parameters reach a compensatory state but the posture is still within the normal range of activity, the system enters a moderate support mode: the pressure of the central airbag 220 is slowly increased to 20kPa to 30kPa to share some of the muscle load, and acupoint therapy is activated simultaneously. When a high-risk angular acceleration event is detected, or the posture angle exceeds the preset safety boundary, such as a forward flexion angle greater than 60° while the muscles are already fatigued, the system immediately enters a reinforced support mode: the microcontroller opens the solenoid valves corresponding to all airbags and starts the air pump 300 to inflate at a higher power, forming auxiliary rigid support and limiting dangerous movements. After inflation is complete, the system monitors the attitude every 100ms. Once the attitude returns to normal and the high-risk flag is cleared, the system slowly deflates at the set rate.

[0035] Considering wearing comfort and long-term reliability, this embodiment incorporates a cushioning layer 700 within the integrated space 120. The cushioning layer 700 is preferably made of flexible foam or silicone padding, with a preferred thickness of 3mm to 8mm, and covers the periphery of the inertial measurement unit 500, the micro-vibration motor, and the circuit module. When the wearer leans back in a chair or rests supine, the cushioning layer 700 isolates the rigid components from direct pressure on the spinous processes of the spine, reducing pressure sores or discomfort, while also absorbing vibrations and protecting the electronic components.

[0036] It should be noted that, to ensure the inertial measurement unit 500 is accurately aligned with the midline of the spine and the surface projection positions of the L1, L3, and L5 spinous processes, users can complete the initial positioning through simple illustrated instructions or animated guidance in the mobile app, without the guidance of professional medical personnel. After positioning, the system can automatically determine whether the wearing is accurate by using the signal quality detected by the electromyography sensor 400 and the pressure array, such as the amplitude of electromyography in each channel, left-right symmetry, and pressure distribution, and prompt the user to adjust through beeping or vibration. After one or two uses, users can usually wear the device independently. In community rehabilitation institutions or hospitals, calibration can be assisted by a physician or therapist.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent lumbar support system, characterized in that, include: The waist belt body (100) includes an inner skin-adhering layer (110) and an outer binding layer (130). The inner skin-adhering layer (110) is used to adhere to human skin, and the outer binding layer (130) is used to wrap around and fix the waist of the human body. An integrated space (120) is formed between the inner skin-adhering layer (110) and the outer binding layer (130). The integrated space (120) is equipped with two sets of airbag arrays (200). The two sets of airbag arrays (200) are symmetrically arranged relative to the middle of the waist belt body (100). Each set of airbag arrays (200) has at least one airbag. The airbag is long and columnar. When the waist belt body (100) is wrapped around and fixed to the waist of the human body, the airbag is configured to be arranged vertically and abuts against the waist of the human body through the peripheral wall.

2. The intelligent lumbar support system according to claim 1, characterized in that, Each of the airbag arrays (200) includes an inner airbag (210) for supporting the paraspinal muscle group area directly behind the back of the human body.

3. The intelligent lumbar support system according to claim 2, characterized in that, Each of the airbag arrays (200) also includes an external airbag (230) located on the side of the inner airbag (210) away from the middle of the waist belt body (100), and the external airbag (230) is used to support the external oblique and quadratus lumborum muscle regions of the human body.

4. The intelligent lumbar support system according to claim 3, characterized in that, Each of the airbag arrays (200) also includes a central airbag (220) located between the outer airbags (230) and the inner airbags (210), the central airbag (220) being used to support the erector spinae muscle belly region of the human back.

5. The intelligent lumbar support system according to claim 4, characterized in that, The inner airbag (210) has a diameter of 15mm to 25mm, the middle airbag (220) has a diameter of 35mm to 50mm, and the outer airbag (230) has a diameter of 25mm to 35mm.

6. The intelligent lumbar support system according to claim 5, characterized in that, The integrated space (120) is also equipped with an air pump (300) and an air main pipe (310) connected to the air pump (300). The inner airbag (210), the middle airbag (220) and the outer airbag (230) are independent of each other and each extends a branch air path (320) at the bottom. Each branch air path (320) is connected to the air main pipe (310).

7. The intelligent lumbar support system according to claim 1, characterized in that, The integrated space (120) is also equipped with two electromyography (EMG) sensors (400), which are symmetrically distributed on both sides of the waist belt body (100) to fit the back muscles and collect surface EMG signals.

8. The intelligent lumbar support system according to claim 1, characterized in that, The integrated space (120) is vertically spaced with three inertial measurement units (500), which correspond to the projected positions of the spinous processes of the L1, L3, and L5 lumbar vertebrae of the human body, respectively. Each inertial measurement unit (500) includes a three-axis accelerometer and a three-axis gyroscope, which are used to collect information on the linear acceleration, angular velocity, and attitude change of the lumbar vertebral segments in three-dimensional space, with a sampling frequency of 100Hz to 200Hz.

9. The intelligent lumbar support system according to claim 8, characterized in that, The inner skin-adhesive layer (110) is provided with three graphene heating films (600) arranged at intervals along the horizontal direction. The two graphene heating films (600) on the left and right sides correspond to the Shenshu acupoints on the left and right sides, respectively, and the graphene heating film (600) in the middle corresponds to the Mingmen acupoint. The working temperature of the graphene heating film (600) is 42℃~45℃. The integrated space (120) is equipped with a vibration motor corresponding to the graphene heating film (600), and the vibration frequency of the vibration motor is 5Hz to 15Hz.

10. The intelligent lumbar support system according to claim 9, characterized in that, The integrated space (120) is also provided with a buffer liner (700), which is a flexible pad with a thickness of 3mm to 8mm, covering the inertial measurement unit (500) and the vibration motor to isolate the hard device from direct contact with the human spinous process.

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