Rhythm fluctuation sleep aid pillow system with vestibular stimulation function

Abstract

The present application belongs to the technical field of intelligent sleep intervention and medical auxiliary devices, and relates to a rhythm fluctuation sleep-aiding pillow system with a vestibular stimulation function, comprising a pillow body and an independent control box; a plurality of air bag units arranged in a matrix are arranged in the pillow body, and each air bag unit is provided with an in-situ pressure sensor; the control box is integrated with a pneumatic pump group, a pneumatic valve group and a micro-processing unit; and a connecting pipeline is connected between the pillow body and the control box. According to preset low-frequency sinusoidal driving instructions and in-situ pressure feedback, the micro-processing unit independently adjusts the opening degree of each valve, drives the air bag unit to inflate and deflate in a low-frequency sinusoidal rhythm, and performs differential closed-loop compensation when the head is subjected to partial load, so as to realize synchronous isohypse or approximate isohypse lifting. The flexible pneumatic array generates a rhythm fluctuation stimulation of 0.25 Hz, which is suitable for human vestibular perception, guides the brain wave to transit from the awake beta wave band to the relaxed alpha and theta wave bands, has the advantages of high integration and no drug dependence, and is suitable for sleep auxiliary adjustment of home and medical insomnia groups.

Description

Technical Field

[0001] This invention belongs to the field of intelligent sleep intervention and medical auxiliary device technology, and relates to a rhythmic undulation sleep aid pillow system with vestibular stimulation function. Background Technology

[0002] With the fast pace of modern life and increasing work pressure, sleep disorders such as difficulty falling asleep, frequent awakenings, and low levels of deep sleep have become significant health problems. Long-term sleep deprivation can lead to cognitive decline and increase the risk of cardiovascular disease. Clinically used hypnotic drugs often lead to addiction and drug tolerance; therefore, exploring safe, side-effect-free non-drug physical sleep aids has become a research hotspot. Clinical sleep medicine and neurobiological research shows that rhythmic three-dimensional spatial displacement at specific frequencies (especially 0.2-0.3 Hz, with a typical value of 0.25 Hz) can effectively stimulate the otolith organs in the inner ear. This low-frequency vestibular afferent signal projects to the brainstem and hypothalamus, significantly activating the parasympathetic nervous system to reduce central arousal levels and generating rhythmic synchronization resonance with the thalamocortical network. During non-rapid eye movement (NREM) sleep, this resonance enhances slow-wave activity (SWA) and sleep spindle density, thereby shortening sleep latency and deepening sleep. For related mechanistic studies, please refer to Bayer et al., Rocking synchronizes brain waves during a short nap, Current Biology, 2011 (10.1016 / j.cub.2011.05.012) and Perrault et al., Whole-Night Continuous RockingEntrains Spontaneous Neural Oscillations, Current Biology, 2019 (10.1016 / j.cub.2018.12.028).

[0003] At the engineering implementation level, existing sleep intervention devices are mainly divided into two categories: rigid mechanical drive and pneumatic drive. Traditional rigid mechanical drive devices, such as cam or linkage massage pillows, can provide strong lifting displacement, but their rigid transmission system inevitably generates sudden acceleration changes (Jerk) and gear friction noise at the moment of reversal, which seriously damages the auditory microenvironment during sleep. Furthermore, such mechanisms directly apply a harsh vertical thrust to the cervical spine in the supine position, which violates the natural physiological curvature of the cervical spine and is prone to generating harmful reverse shear forces, bringing health risks.

[0004] To overcome the shortcomings of rigid drives, existing pneumatic sleep aid solutions employ diaphragm air pumps and miniature exhaust solenoid valves, often in conjunction with a single large-area airbag. While pneumatic methods offer advantages in terms of flexible contact, they are limited by the 'throat effect' of the miniature valve orifice, resulting in slow exhaust and difficulty in accurately matching a 0.25Hz (4 seconds / cycle) rhythm. The noise generated by the high-frequency opening and closing of the solenoid valve can easily wake the user. When the head's center of gravity is unbalanced, the gas in the single large-area airbag is compressed and flows due to gravity, which can easily lead to abnormal bulging of the airbag on one side and lateral slippage of the head.

[0005] Furthermore, Chinese patent CN111467642B discloses a smart pillow and its control method and device, control equipment, and storage medium, involving a smart pillow architecture comprising airbags, pressure sensors, air pumps, and electronic air valves; Chinese patent CN120900075A discloses a smart sleep regulation system involving BCG signal acquisition, multi-channel airbags, and inflation / deflation adjustment support; and Chinese patent CN112169132A discloses a smart pillow that regulates human breathing, using the cyclic inflation and deflation of airbags to drive pillow body undulation and guide breathing frequency. The technical solutions represented by the above documents have made improvements in intelligent control, physiological feedback, and multi-airbag adjustment, but a technical solution has not yet been formed that simultaneously solves the problems of closed-loop leveling of multi-channel airbags under non-uniform loads, precise sinusoidal wave control, and sleep-level quiet operation.

[0006] In summary, there is an urgent need in this field for a novel sleep aid system that can eliminate rigid support, achieve precise and smooth 0.25Hz vestibular stimulation rhythm within the framework of conventional bedding, while also taking into account the ability to customize zones, anti-eccentric self-balancing support, and a sleep-level silent mechanism. Summary of the Invention

[0007] The technical problem to be solved by this invention is: how to achieve precise and smooth 0.25Hz vestibular stimulation micro-undulation using a flexible pneumatic array without introducing rigid mechanical drive, while solving the problems of airbag height synchronization and sleep-level silence when the head is off-center.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A rhythmic undulation sleep aid pillow system with vestibular stimulation function, characterized in that it comprises: The pillow body 1 has a flexible stacked structure inside, which includes multiple airbag units 7 arranged in a matrix, and each airbag unit 7 is provided with an in-situ pressure sensor 9 for detecting the pressure in its cavity. Independent control box 2, which integrates pneumatic pump group 21, pneumatic valve group 22 and microprocessor unit; Connecting pipes are used to connect the independent control box 2 with each of the airbag units 7 inside the pillow body 1; The microprocessor unit is electrically connected to the in-situ pressure sensor 9, the pneumatic pump group 21, and the pneumatic valve group 22, respectively, and is configured to: receive the pressure signals fed back by each of the in-situ pressure sensors 9 according to the preset low-frequency sinusoidal wave drive command, independently adjust the opening degree of each valve in the pneumatic valve group 22 to drive each of the airbag units 7 to perform low-frequency sinusoidal rhythm inflation and deflation, and perform differentiated closed-loop pressure compensation for each airbag unit under the head off-center load condition, so as to realize the synchronous equal height or approximately equal height lifting of each of the airbag units 7.

[0009] Preferably, the inflation / deflation frequency corresponding to the preset low-frequency sine wave drive command is 0.25Hz, and the period is 4 seconds; the vertical displacement stroke of the airbag unit 7 is 2-30mm.

[0010] Preferably, the matrix-arranged multiple airbag units 7 are in a 3×4 array, with a total of 12 independently operating airbag units 7.

[0011] Furthermore, the pillow body 1 is provided with an airbag support base plate 8 and an integrated air distribution manifold 13. The integrated air distribution manifold 13 is laid on the airbag support base plate 8 and is used to connect the main air path to the corresponding airbag unit 7 through the terminal branch and sealing interface 14. Each airbag unit 7 and air distribution structure is locked between the airbag support base plate 8 and the bottom anti-slip layer 10 by self-tapping screws 15 and hexagonal screws 16.

[0012] Preferably, the flexible laminated structure further includes a memory foam buffer layer 6 and a latex filler 11 located above the airbag unit 7.

[0013] Preferably, the independent control box 2 further includes a large-capacity capacitor 19, an external main power interface 24, an external communication signal interface 25, and a physical toggle switch 23; the pneumatic pump group 21 is composed of multiple pneumatic pumps 20 connected in parallel, and the pneumatic valve group 22 is a proportional solenoid valve group.

[0014] Preferably, the microprocessor unit includes a microcontroller 28 and its peripheral chips 27, as well as an expansion board 26 for aggregating multiple sensor signals.

[0015] Furthermore, the microprocessor unit embeds a sine wave command generator and a digital PID controller. The sine wave command generator is used to generate the preset low-frequency sine wave drive command, and the digital PID controller is used to output correction commands based on the deviation between the target sine pressure and the actual feedback pressure of each channel, so as to adjust the duty cycle of each valve in the pneumatic valve group 22.

[0016] Preferably, the connecting pipeline includes a connecting corrugated pipe 3, which is internally wrapped with a flexible air tube and an electrical signal harness, and its end is rigidly and sealed to the side wall of the pillow body 1 through a fastening flange 5.

[0017] Preferably, a side control panel 4 is embedded in the side of the pillow body 1, serving as an HMI interactive terminal for gear switching or mode selection.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The microprocessor unit independently adjusts the opening of each valve based on preset low-frequency sinusoidal drive commands and in-situ pressure feedback, driving the airbag unit to inflate and deflate in a low-frequency sinusoidal rhythm. It also performs differentiated closed-loop compensation when the head is under bias, achieving synchronous or near-synchronous elevation. The flexible pneumatic array generates a 0.25Hz rhythmic fluctuation stimulation adapted to human vestibular perception, guiding brain waves from the awake beta band to the relaxed alpha and theta bands. It boasts advantages such as high integration and no drug dependence, making it suitable for home-based and medical sleep assistance for insomnia sufferers.

[0019] The pillow body of this invention adopts a fully flexible layered structure, consisting of a memory foam cushioning layer, latex filling, matrix-arranged airbag units, an airbag support base plate, and a bottom anti-slip layer from top to bottom. It abandons the rigid support plate structure of traditional massage pillows, allowing the pillow body to adapt to the shape of the head while providing support, avoiding the harmful reverse shear force on the cervical spine caused by rigid transmission. The 3×4 matrix airbag array is divided into 12 independently operating airbag units, each of which can be independently inflated and deflated and independently pressure controlled, fundamentally suppressing gas flow when the head is unbalanced. With the help of a digital PID regulator, the deviation between the target sinusoidal pressure and the actual feedback pressure of each channel is corrected in real time, realizing differentiated compensation of the air intake on the pressure side and the unpressure side, ensuring that the airbag units are raised synchronously at the same height or approximately at the same height under unbalanced conditions, avoiding head slippage and pillow surface tilting.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of a rhythmic undulation sleep aid pillow with vestibular stimulation function according to the present invention. Figure 2 This is a cross-sectional view of the internal structure of the pillow body of the present invention along the Z-axis displacement (the left image shows the state before inflation and the right image shows the state after inflation and lifting). Figure 3 This is a diagram showing the 3×4 airbag array arrangement and bottom pipeline topology inside the pillow body of the present invention. Figure 4 This is a schematic diagram of the internal layout of fine components in the independent control box of the present invention; Figure 5 This is a topology diagram of the hardware and software control logic and closed-loop data flow of the system of the present invention; Reference numerals: 1-Pillow body, 2-Independent control box, 3-Connecting bellows, 4-Side control panel, 5-Fasting flange, 6-Memory foam cushioning layer, 7-Airbag unit, 8-Airbag support base plate, 9-In-situ pressure sensor, 10-Bottom anti-slip layer, 11-Latex filling, 13-Integrated air distribution manifold, 14-Sealing interface, 15-Self-tapping screw, 16-Hex socket screw, 17-Control box cover, 18-Control box body, 19-Large capacity capacitor, 20-Pneumatic pump, 21-Pneumatic pump assembly, 22-Pneumatic valve assembly, 23-Physical toggle switch, 24-External main power interface, 25-External communication signal interface, 26-Expansion board, 27-Peripheral chip, 28-Microcontroller. Detailed Implementation

[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] This invention provides a rhythmic undulation sleep-aid pillow system with vestibular stimulation function. The system adopts a "mechanical-electrical separation" physical architecture, including a pillow body 1, an independent control box 2, and a connecting bellows 3 connecting the two. The independent control box 2 serves as the power source and control center, and can be placed away from the user's head on a bedside table or under the bed to maximize isolation of operating noise. The pillow body 1 employs a fully flexible layered structure, with multiple airbag units 7 forming a matrix-like flexible support structure to avoid the reverse shear force on the cervical spine from rigid transmission. Rhythmic inflation and deflation and anti-eccentric leveling are achieved through in-situ pressure sensors 9 and a closed-loop pneumatic network.

[0024] Example 1 This embodiment provides a structural deployment of a closed-loop pneumatic sleep aid pillow system with vestibular stimulation function.

[0025] Figure 1 This is a schematic diagram of the overall structure of a rhythmic undulation sleep aid pillow with vestibular stimulation function according to the present invention. Figure 1The rhythmic undulation sleep aid pillow 100 consists of three parts: pillow body 1, independent control box 2, and connecting corrugated pipe 3. The three parts form a separate layout of "pillow body execution, control box power supply and control, and corrugated pipe transmission".

[0026] The structural deployment inputs for this embodiment are the mechanical installation and connection relationships of the rhythmic undulation sleep aid pillow 100 and the external usage environment.

[0027] The processing involves transmitting the pneumatic power and electrical control signals generated by the independent control box 2 to the pillow body 1 via the bellows 3, and transmitting the sensor signals from the pillow body 1 back to the independent control box 2.

[0028] The output indicates the air and electrical connection status between the pillow body 1 and the independent control box 2.

[0029] The above process achieves electromechanical separation, allowing the independent control box 2, which generates gas power and controls the actions, to be placed away from the user's head. This physically isolates the background noise generated by the operation of the air pump and valve assembly, avoiding interference with the auditory microenvironment during sleep.

[0030] The corrugated pipe 3 internally integrates multiple flexible air tubes and electrical signal harnesses, thus confining multiple airflow channels and sensor signal lines within a single flexible channel. The end of the corrugated pipe 3 is rigidly sealed to the side wall of the pillow body 1 via a high-strength fastening flange 5, ensuring no leakage of high-pressure gas at the interface and preventing loosening of the electrical signal harness during repeated use. A side control panel 4 is integrated into the side of the pillow body 1. This side control panel 4 serves as an HMI interactive terminal, allowing users to conveniently switch gears or select modes. Mode commands input by the user through this panel are transmitted via the electrical signal harness to the microprocessor unit in the independent control box 2.

[0031] Example 2 This embodiment provides a flexible internal structure for the pillow body and a 3×4 air passage array.

[0032] Figure 2 This is a cross-sectional view of the internal structure of the pillow body of the present invention along the Z-axis displacement, wherein the left view shows the state of falling back before inflation and the right view shows the state of rising after inflation. Figure 2 Inside the pillow body 1, from top to bottom, are arranged a memory foam cushioning layer 6, a latex filling 11, a longitudinally arranged airbag unit 7, an airbag support base plate 8, and a bottom anti-slip layer 10.

[0033] The inputs in this embodiment are the gas flow rate and pressure delivered to each airbag unit 7 of the pillow body 1 via the independent control box 2 and the gravity distribution of the human head acting on the upper surface of the pillow body 1; the processing is that the airbag unit 7 expands or contracts along the Z-axis under the action of gas pressure, while the pressure sensor 9 collects the pressure inside the airbag cavity; the outputs are the height changes of the airbag unit 7 before and after inflation, and the real-time pressure sampling signal; its function is to abandon the rigid support plate structure of traditional massage pillows and adopt a fully flexible layered structure, so that the pillow body 1 can adapt to the shape of the head while providing support, avoiding the harmful reverse shear force on the cervical spine caused by rigid transmission.

[0034] Figure 2 The comparison shows the state of airbag unit 7 before and after inflation. Through inflation and deflation, airbag unit 7 only produces an absolutely vertical Z-axis displacement. The height of the airbag itself is 2mm, and the upper limit height after restarting is 30mm. During operation, the stroke range is precisely controlled between 2-30mm. This stroke range ensures sufficient micro-vertical undulation amplitude to generate vestibular stimulation, while avoiding excessive elevation amplitude that could cause user discomfort or structural instability.

[0035] The top layer consists of a memory foam cushioning layer 6 and latex filling 11, which come into direct contact with the head and provide pressure dispersion and flexible support during rest. The bottom layer is an airbag support base plate 8 that provides reaction force. A bottom anti-slip layer 10 composed of silicone rubber bumps is attached to the bottom of the base plate to prevent the pillow from shifting on the bed. At the bottom of each airbag unit 7, where it intersects with the base plate, a pressure sensor 9 is in place. This pressure sensor 9 directly collects the actual air pressure inside the airbag cavity, eliminating the pressure detection lag caused by long tubing and providing a closed-loop data source for subsequent "anti-eccentric load leveling".

[0036] Figure 3 This is a diagram showing the 3×4 airbag array arrangement and bottom pipeline topology inside the pillow body of the present invention. Figure 3 The relative positions of the 3×4 airbag array partition 12, airbag support base plate 8, integrated air distribution manifold 13, sealing interface 14, self-tapping screw 15 and internal hex screw 16 can be seen.

[0037] In this embodiment, the input is the total air flow rate and pressure after the main air path enters the pillow body 1; the processing is that the integrated air distribution manifold 13 divides the main air path into 12 terminal branches, and then delivers them to the corresponding airbag units 7 through the sealed interface 14; the output is the gas flow rate and pressure obtained independently by each of the 12 airbag units 7; its function is to solve the problem of gas flow and side tilting bulge caused by a single large airbag. By planning a 3×4 airbag array partition 12 on the cross section of the pillow body and setting 12 independently operating airbag units 7, each partition can be independently inflated and deflated and independently pressure controlled, fundamentally suppressing the flow of gas between airbags when the head is on the side.

[0038] An integrated gas distribution manifold 13 is laid on the airbag support base plate 8. After the main gas path enters the pillow body, it is evenly distributed to 12 end positions through this manifold network. At each end branch, it is connected to the corresponding airbag unit above through a sealing interface 14. The sealing interface 14 ensures that the gas does not leak at the branch interface, and also facilitates assembly and maintenance.

[0039] Each airbag unit and air distribution structure is securely locked between the airbag support base plate 8 and the bottom anti-slip layer 10 using self-tapping screws 15 and hex socket screws 16, ensuring that the physical structure does not deform or leak during high-pressure inflation. The electronic signal cables of the 12 in-situ pressure sensors 9 are collected through the wiring groove at the bottom of the base plate and transmitted back to the independent control box 2 via the connecting bellows 3, enabling the microprocessor unit to obtain real-time pressure data from all 12 airbag units.

[0040] Example 3 This embodiment provides a sophisticated hardware deployment within an independent control box.

[0041] Figure 4 This is a schematic diagram of the internal layout of fine components in the independent control box of the present invention. After opening the control box cover 17, the following components can be seen inside the control box body 18: a large-capacity capacitor 19, a pneumatic pump assembly 21, a pneumatic valve assembly 22, a physical toggle switch 23, an external main power interface 24, an external communication signal interface 25, an expansion board 26, peripheral chips 27, and a microcontroller 28.

[0042] The inputs in this embodiment are external power supply, control signals, and start operation.

[0043] The processing involves the coordinated operation of the power execution array and digital control center inside the control box, converting electrical energy into compressed gas and adjusting the gas flow according to control commands. The output is an adjustable airflow delivered to each airbag unit 7 of the pillow body 1 via the pneumatic valve group 22, providing the power and control basis for independent pressure regulation of multiple airbags, enabling the system to achieve independent flow regulation and pressure compensation for each airbag unit 7 during dynamic operation.

[0044] The independent control box 2 integrates a pneumatic power module and a digital control module. The power actuation array includes a pneumatic pump 20 that provides a stable positive pressure airflow. Multiple pneumatic pumps 20 are connected in parallel to form a pneumatic pump group 21 to ensure the power foundation for multiple airbags. It also includes a pneumatic valve group 22, preferably a proportional solenoid valve, which is responsible for independent air path distribution and flow regulation.

[0045] The digital control center includes a microcontroller 28 carrying the core algorithm and its peripheral chips 27, as well as an expansion board 26 for aggregating signals from multiple sensors. The power supply and interface include a large-capacity capacitor 19 for smoothing the transient voltage drop during air pump startup, an external main power interface 24 (connected to 12V / 24V), an external communication signal interface 25, and a physical toggle switch 23.

[0046] Example 4 This embodiment provides a dynamic closed-loop control logic and a 0.25Hz vestibular induction mechanism.

[0047] Figure 5 This is a topology diagram of the hardware and software control logic and closed-loop data flow of the system of the present invention. Figure 5 The closed-loop link from the HMI interactive terminal, microprocessor unit, pneumatic actuator to airbag unit and pressure sensor can be seen. The microprocessor unit includes a sine wave generator and a digital PID controller, and the pneumatic actuator includes a pneumatic pump group 21 and a pneumatic valve group 22.

[0048] This embodiment implements dynamic closed-loop control according to the following steps.

[0049] Step S1: Instruction issuance and initialization.

[0050] The inputs are the mode and external power supply selected by the user through the HMI interactive terminal.

[0051] The process involves the side control panel 4 sending mode commands to the microprocessor unit, while the power management unit supplies power to the motherboard and air pump.

[0052] The output indicates that the microprocessor unit has entered standby mode and the pneumatic pump unit 21 has begun to build up the air source pressure.

[0053] Its function is to provide stable power and air supply conditions for subsequent sinusoidal trajectory generation and pneumatic execution, and to determine the control target according to the mode selected by the user.

[0054] Step S2: Generating the sine trajectory.

[0055] The input consists of the mode parameters and control cycle determined by the microprocessor unit.

[0056] The processing begins with the sine wave generator embedded in the microprocessor unit starting up, generating a target ideal pressure sine curve on the time axis with a period of 4 seconds (i.e., 0.25Hz frequency) and an amplitude corresponding to a displacement of 2-30mm.

[0057] The output is a target pressure curve that varies over time, which serves as a reference signal for the pressure control of each airbag.

[0058] Its function is to give the system output a clear low-frequency sinusoidal rhythm, eliminate the transient abruptness of gas reversal from the underlying algorithm, and provide a precise 0.25Hz physical fluctuation reference for vestibular stimulation.

[0059] Step S3: Anti-eccentric load closed-loop regulation.

[0060] The input consists of the target sinusoidal pressure curve generated in step S2 and the pressure signals inside the airbag cavity collected in real time by each in-situ pressure sensor 9.

[0061] The process involves the following steps: During the dynamic lifting process, the weight of the human head will inevitably shift to one side. The array of miniature pressure sensors inside the airbag on the pressure side measures the higher back pressure and transmits the digital sampling data back to the ADC sampling interface of the microcontroller in real time. The digital PID regulator inside the microprocessor unit quickly intervenes to calculate the deviation between the target sinusoidal pressure and the actual feedback pressure of each channel.

[0062] The output consists of correction commands for each channel generated by the digital PID controller.

[0063] Its function is to incorporate the back pressure difference of each airbag caused by head offset into the closed-loop control, so that the control system can identify and quantify the load imbalance state of each channel, and provide a basis for the next step of differentiated adjustment.

[0064] Step S4: Valve opening correction.

[0065] The input is the channel correction instructions output in step S3.

[0066] The processing involves the microcontroller sending correction commands to the power drive circuit through the PWM / DAC output port to independently adjust the duty cycle of each proportional valve in the pneumatic valve group.

[0067] The output is the change in the opening degree of each proportional valve, and the corresponding change in the intake volume of each channel.

[0068] Its function is to independently control the air intake and exhaust speed of each airbag unit by changing the duty cycle of the proportional valve, so that the air intake volume of the pressurized side and the unpressurized side can be quickly adjusted according to the actual off-center load, thereby realizing closed-loop flow compensation and avoiding asynchronous lifting caused by relying solely on uniform inflation.

[0069] Step S5: Anti-eccentric load leveling is performed.

[0070] The input is the corrected opening state of each proportional valve.

[0071] The process involves the pneumatic system forcibly increasing the air intake volume on the pressurized side and decreasing the air intake volume on the unpressurized side, so that the internal pressure of each airbag unit 7 gradually approaches the target value that makes the pillow surface horizontal.

[0072] The output consists of 12 airbag units 7 that still achieve the same or similar Z-axis height when subjected to different head gravity loads.

[0073] Its function is to overcome the physical gravity load on the flexible airflow level, achieve absolute horizontal and uniform elevation of the 3×4 matrix airbags, avoid head lateral slippage and pillow surface tilt, and ensure that users still receive uniform support under eccentric load conditions.

[0074] Step S6: Execute the rhythm fluctuation.

[0075] The input provides a continuous power airflow to the DC air pump, as well as a sinusoidal target pressure curve and closed-loop constraints for the digital PID controller.

[0076] The process involves the airbag array undergoing inflation and deflation cycles strictly following a 0.25Hz sine wave trajectory under the precise constraints of a PID algorithm.

[0077] The output is a low-frequency micro-shaking motion generated by the vertical undulation of the upper surface of the pillow body 1 along with the airbag unit 7, which is transmitted to the user's head.

[0078] Its function is to output smooth, low-frequency shaking stimulation to the vestibular system of the human brain, inducing sleep brain waves and achieving physical sleep aid.

[0079] The structures, parameters, and control processes described in the above steps are only used to illustrate the specific implementation of the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A rhythmic undulation sleep aid pillow system with vestibular stimulation function, characterized in that, include: The pillow body (1) has a flexible stacked structure inside, the flexible stacked structure includes multiple airbag units (7) arranged in a matrix, and each airbag unit (7) is provided with an in-situ pressure sensor (9) for detecting the pressure inside its cavity. Independent control box (2), which integrates pneumatic pump group (21), pneumatic valve group (22) and microprocessor unit; Connecting pipes are used to connect the independent control box (2) to each of the airbag units (7) inside the pillow body (1); The microprocessor unit is electrically connected to the in-situ pressure sensor (9), the pneumatic pump group (21), and the pneumatic valve group (22) respectively, and is configured to: receive the pressure signal fed back by each of the in-situ pressure sensors (9) according to the preset low-frequency sinusoidal wave drive command, independently adjust the opening degree of each valve in the pneumatic valve group (22) to drive each of the airbag units (7) to perform low-frequency sinusoidal rhythm inflation and deflation, and perform differentiated closed-loop pressure compensation for each airbag unit under the head off-center load condition, so as to realize the synchronous equal height or approximately equal height lifting of each of the airbag units (7).

2. The system according to claim 1, characterized in that, The inflation / deflation frequency corresponding to the preset low-frequency sine wave drive command is 0.25Hz, and the period is 4 seconds; the vertical displacement stroke of the airbag unit (7) is 2-30mm.

3. The system according to claim 1, characterized in that, The matrix-arranged multiple airbag units (7) are arranged in a 3×4 array, with a total of 12 independently operating airbag units (7).

4. The system according to claim 3, characterized in that, The pillow body (1) is provided with an airbag support base plate (8) and an integrated air distribution manifold (13). The integrated air distribution manifold (13) is laid on the airbag support base plate (8) and is used to connect the main air path to the corresponding airbag unit (7) through the end branch and sealing interface (14). Each airbag unit (7) and air distribution structure is locked between the airbag support base plate (8) and the bottom anti-slip layer (10) by self-tapping screws (15) and hexagonal screws (16).

5. The system according to claim 1, characterized in that, The flexible laminated structure also includes a memory foam buffer layer (6) and latex filling (11) located above the airbag unit (7).

6. The system according to claim 1, characterized in that, The independent control box (2) also includes a large-capacity capacitor (19), an external main power interface (24), an external communication signal interface (25), and a physical toggle switch (23); the pneumatic pump group (21) is composed of multiple pneumatic pumps (20) connected in parallel, and the pneumatic valve group (22) is a proportional solenoid valve group.

7. The system according to claim 1, characterized in that, The microprocessor unit includes a microcontroller (28) and its peripheral chips (27), as well as an expansion board (26) for aggregating multiple sensor signals.

8. The system according to claim 7, characterized in that, The microprocessor unit is embedded with a sine wave command generator and a digital PID controller. The sine wave command generator is used to generate the preset low-frequency sine wave drive command, and the digital PID controller is used to output correction commands according to the deviation between the target sine pressure and the actual feedback pressure of each channel, so as to adjust the duty cycle of each valve in the pneumatic valve group (22).

9. The system according to claim 1, characterized in that, The connecting pipeline includes a connecting corrugated pipe (3), which is internally wrapped with a flexible air tube and an electrical signal harness. Its end is rigidly sealed to the side wall of the pillow body (1) through a fastening flange (5).

10. The system according to claim 1, characterized in that, The side of the pillow body (1) is fitted with a side control panel (4), which serves as an HMI interactive terminal for gear switching or mode selection.

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