Children respiratory training instrument with state prompting function

Abstract

The invention relates to the technical field of medical instruments, and discloses a children respiratory training instrument with a state prompting function, which optimizes the safety and effect of children respiratory training through multi-dimensional innovation. The dynamic rainbow lighting effect system visually maps the breathing intensity through color gradient, and the training concentration of children is improved; intelligent resistance adjustment is matched with the lung function of the child in a self-adaptive mode, and training intensity and safety are balanced; a multi-mode feedback mechanism is used for recognizing abnormal breathing in real time, triggering acousto-optic warning and resistance adjustment in a grading manner, and pre-warning the sputum retention risk; the data communication module realizes wireless transmission of breathing parameters, and parents can check real-time curves, historical frequencies and risk trends through mobile phones and receive intelligent training prompts; the self-cleaning function simplifies the maintenance process, and the use convenience is remarkably improved in combination with a child-friendly structure and the wireless interaction characteristic. According to the invention, breakthroughs are made in the aspects of safety, data traceability and man-machine interaction, and a scientific and intelligent integrated solution is provided for respiratory rehabilitation of children.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and particularly to a children's respiratory trainer with a status prompt function. Background Art

[0002] A respiratory trainer is a medical device that helps patients improve their respiratory function by adjusting respiratory resistance and monitoring respiratory parameters, and is widely used in fields such as postoperative rehabilitation and the treatment of chronic respiratory diseases. Traditional devices mostly use a combination of a mechanical resistance valve and a basic sensor, and guide patients to perform respiratory training through feedback of pressure or flow data.

[0003] However, there are significant deficiencies in the application of existing technologies to the children's population: First, the adult design results in a mismatch between the device volume and resistance parameters and the physiological characteristics of children, which easily causes discomfort during use; second, the lack of feedback during training makes it difficult to attract children to persist in training for a long time; third, traditional devices lack the intelligent recognition ability for children's respiratory compensatory movements and cannot timely warn of risks such as sputum retention, presenting potential safety hazards; in addition, the hygiene maintenance mechanism is imperfect and it is difficult to meet the high-frequency disinfection requirements of children's products. For this reason, a children's respiratory trainer with a status prompt function is proposed. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a children's respiratory trainer with a status prompt function to solve the problems in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A children's respiratory trainer with a status prompt function, comprising:

[0006] A trainer body, with a mouthpiece for sealing connection with a child's mouth at its front end, and a flow-limiting regulating valve for adjusting expiratory resistance at the air flow outlet at the rear end. Integrated in the middle are:

[0007] A respiratory detection module: comprising a differential pressure flow sensor and a pressure sensor, respectively used to detect the expiratory flow velocity V and airway pressure P;

[0008] A humidity sensor: used to monitor the humidity RH inside the mouthpiece;

[0009] An inertial sensor: used to detect the head elevation angle β;

[0010] A vibration feedback device: used to detect the sputum viscosity index η;

[0011] A rainbow light strip: longitudinally attached to the outer wall of the trainer body, comprising N total independent LED units, arranged equidistantly according to the hue angle H, and used to reflect the respiratory intensity by the number of lit LEDs;

[0012] Flow-limiting regulating valve: Installed at the air outlet at the end of the training device body, used to adjust the exhalation resistance;

[0013] Control module: Fixed in the circuit compartment in the middle of the training device body, used to process the data of the breathing detection module and control the light effect and gas flow;

[0014] Buzzer: Integrated at the tail of the training device body, used to issue a safety alarm;

[0015] Data communication module: Integrated on the control module, supporting Bluetooth or Wi-Fi wireless transmission, used for the interaction between the control module and external mobile terminals;

[0016] The control module is programmed to perform breathing phase recognition, multi-level light effect feedback, sputum viscosity warning, light effect control, posture compensation and safety strategies.

[0017] Preferably, the control module performs breathing phase recognition to distinguish between the inhalation and exhalation phases:

[0018] When V > aV max (a ∈ (0.4, 0.6) is the inhalation trigger flow rate coefficient), and the flow rate change rate When, activate the blue-green segment LED unit (H = 180° - 270°);

[0019] When V > bV max (b ∈ (0.2, 0.4) is the exhalation trigger flow rate coefficient), and the flow rate change rate Activate the red-orange segment LED unit (H = 0° - 90°);

[0020] Calculate the breathing intensity index (k1 ∈ [0.2, 0.3] is the pressure weight coefficient, Q is the breathing intensity index), and control the number of lit units

[0021] Preferably, the control module implements multi-level light effect feedback to provide progressive training guidance:

[0022] Basic mode (Q < k2Q max , k2 ∈ (0.2, 0.4) is the basic mode threshold coefficient): Light up the LED units in the order of N values, and the brightness L i = L MAX ×(1 - k3∣i - N∣)(k3 ∈ [0.04, 0.06] is the attenuation coefficient, i is the serial number of the LED unit), L MAX Is the maximum brightness;

[0023] Reinforcement mode (Q ≥ k4Q max, k4 ∈ (0.6, 0.8) is the enhanced mode threshold coefficient: Trigger the spiral light wave, and the propagation speed v = v0 + k5Q (v0 ∈ [1, 3] cm / s, k5 ∈ [0.4, 0.6] is the speed gain).

[0024] Preferably, the control module controls the opening degree of the flow-limiting regulating valve to achieve non-linear resistance regulation:

[0025] Opening degree

[0026] where θ is the opening and closing angle, e is the natural constant, V max is the preset maximum flow rate, θ min ∈ [10°, 20°], θ max ∈ [70°, 90°], k6 ∈ [0.2, 0.4] is the curve steepness coefficient, k7 ∈ [0.7, 0.9] is the flow rate offset coefficient.

[0027] Preferably, the control module performs sputum viscosity warning and evaluates abnormal airway resistance:

[0028] Calculate the viscosity index (η is the viscosity index, T is the single exhalation duration), when η > η th (η th ∈ [2.0, 3.0] kPa·s 2 is the sputum viscosity threshold):

[0029] Adjust the opening degree of the flow-limiting regulating valve to increase Δθ = k8log 10 (η / η th )(k8 ∈ [4°, 6°] is the opening degree adjustment amount);

[0030] Trigger the LED unit hue shift ΔH ∈ [50°, 70°].

[0031] Preferably, the control module implements attitude compensation to correct the detection error caused by improper body position:

[0032] Detect the head elevation angle β through the inertial sensor:

[0033] When β < γ1 (γ1 ∈ [8°, 12°]), the breathing intensity is corrected to Q′ = Q × (1 + k9sinβ) (k9 ∈ [0.08, 0.12]);

[0034] When β > γ2 (γ2 ∈ [40°, 50°]), force the lowest number of LED units 21 (k 10 ∈ [0.4, 0.6] is the lowest lighting ratio coefficient) to light up.

[0035] Preferably, the control module executes a security policy to prevent respiratory overload:

[0036] When all of the following conditions are met simultaneously:

[0037] The flow rate exceeds the limit, V > λ1V max (where λ1 ∈ [1.1, 1.3] is the flow rate overlimit coefficient) for a duration of t1 ∈ [2, 4] seconds;

[0038] The pressure exceeds the limit, P > λ2P max (where λ2 ∈ [0.8, 1.0] is the pressure overlimit coefficient);

[0039] then the following actions are executed:

[0040] Fully open the flow-limiting regulating valve to θ = θ max ;

[0041] The buzzer alarms at a frequency f ∈ [8, 12] Hz;

[0042] The rainbow light strip switches to a two-color alternating flashing mode.

[0043] Preferably, the control module integrates a cleaning reminder to maintain the hygiene of the device:

[0044] When the humidity sensor detects that RH > ρ1 (where ρ1 ∈ [80%, 90%] is the humidity threshold), the blue LED unit displays a breathing light effect (with a brightness fluctuation of ±30%);

[0045] When the cumulative usage time t > τ (where τ ∈ [25, 35] minutes), the buzzer is triggered to give 3 short prompts.

[0046] Preferably, the interaction functions of the data communication module with external mobile terminals include:

[0047] Training report generation: Generating a visual report based on respiratory data that includes the changing trend of the rainbow light effect and the sputum risk index;

[0048] Intelligent reminder: Pushing suggestions for the next training time through the mobile terminal according to the historical training frequency;

[0049] Parental control: Setting the breathing intensity safety threshold (Q max ) and the single-training duration limit.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The present invention optimizes the safety and effectiveness of children's breathing training through multi-dimensional innovation. The dynamic rainbow light effect system intuitively maps the breathing intensity with color gradients, enhancing children's training concentration; the intelligent resistance adjustment adapts to match children's lung function, balancing the training intensity and safety; the multi-modal feedback mechanism real-time identifies abnormal breathing, triggering audible and visual warnings and resistance adjustment at different levels, accurately warning of the risk of sputum retention; the data communication module enables wireless transmission of breathing parameters, and parents can view real-time curves, historical frequencies, and risk trends through their mobile phones and receive intelligent training reminders; the modular design and self-cleaning function simplify the maintenance process, combined with child-friendly structure and wireless interaction features, significantly enhancing the usability; the present invention has made breakthroughs in terms of safety, data traceability, and human-computer interaction, providing a scientific and intelligent integrated solution for children's breathing rehabilitation.

[0052] Other features and advantages of the present invention will be described in the following specification, and in part will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structure pointed out in the specification, claims, and drawings. Brief Description of the Drawings

[0053] Figure 1 It is a schematic diagram of the overall structure of the breathing trainer of the present invention;

[0054] Figure 2 It is a control block diagram of the breathing trainer of the present invention.

[0055] In the figure: 10, the main body of the trainer; 11, the mouthpiece; 20, the rainbow light strip; 30, the breathing detection module; 31, the flow sensor; 32, the pressure sensor; 33, the humidity sensor; 34, the inertial sensor; 35, the vibration feedback device; 40, the control module; 50, the flow-limiting regulating valve; 60, the buzzer; 70, the data communication module. Detailed Embodiments

[0056] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0057] Please refer to Figure 1 and Figure 2 , a children's breathing trainer with a status prompt function of the present invention includes the following:

[0058] 1. Structural Composition

[0059] 1.1. The main body of the trainer 10

[0060] Material: Medical-grade ABS plastic, with an outer diameter of 38 mm and a length of 160 mm, and the surface is covered with an anti-slip silicone layer.

[0061] Mouthpiece 11: Removable silicone material, with an inner diameter of 8 mm, and spiral flow guiding lines (pitch 3 mm) are provided on the inner wall, which is inclined to facilitate children to see the rainbow light strip 20 mentioned below on the surface of the training instrument body 10.

[0062] Flow-limiting regulating valve 50: Installed at the end of the body, with an initial opening θ min = 15°, and the maximum opening θ max = 90°.

[0063] Circuit compartment: Built-in STM32F407 microcontroller (control module 40), integrated with Bluetooth 5.0 module

[0064] 1.2. Rainbow light strip 20

[0065] LED unit 21: Adopts N total WS2812B full-color LEDs, arranged equidistantly according to the hue angle H. In this embodiment, N total = 24 is taken as an example, and arranged according to the hue angle H i = (i - 1) × 15° (i = 1 to 24), covering the HSV color space of 0° (red) - 345° (magenta), and reflecting the breathing intensity through the number of lit LEDs.

[0066] Layout: Distributed longitudinally along the outer wall of the body, and the surface is covered with a diffusion film (haze value 85%).

[0067] 1.3. Respiration detection module 30

[0068] Concentrated in the middle of the training instrument body 10;

[0069] Includes a differential pressure flow sensor 31 and a pressure sensor 32, which are respectively used to detect the expiratory flow rate V and the airway pressure P;

[0070] Humidity sensor 33: Used to monitor the humidity RH inside the mouthpiece 11;

[0071] Inertial sensor 34: Used to detect the head elevation angle β;

[0072] Vibration feedback device 35: Used to detect the expiratory sputum viscosity index η.

[0073] 1.4. Buzzer 60

[0074] Integrated at the tail of the training instrument body 10, used to issue a safety alarm.

[0075] 1.5. Control module 40

[0076] Fixed in the central circuit compartment of the training instrument body 10, it is used to process the data of the breathing detection module 30 and control the light effect and gas flow, and is programmed to perform breathing phase recognition, multi-level light effect feedback, sputum viscosity warning, light effect control, posture compensation and safety strategies.

[0077] 1.6. Data communication module 70

[0078] Hardware composition:

[0079] Bluetooth 5.2 / Wi-Fi dual-mode chip (ESP32-C3), integrated on the control module 40, to interact with external mobile terminals;

[0080] Built-in antenna, communication distance ≥ 10 meters (in an unobstructed environment);

[0081] Function implementation:

[0082] Transmit breathing parameters: expiratory flow rate V, airway pressure P, breathing intensity Q, sputum viscosity index η;

[0083] The control module 40 receives instructions from external mobile terminals through the data communication module 70: update training target parameters (such as Q max ) and adjust the light effect mode.

[0084] 2. Control implementation

[0085] 2.1. Breathing phase recognition

[0086] The control module 40 receives the data detected by the flow sensor 31 and the pressure sensor 32, and executes the following decision logic to distinguish the inhalation and exhalation phases:

[0087] 2.11. Inhalation phase trigger condition:

[0088] V > aV max And If α = 0.5 (inhalation trigger flow coefficient), V max = 2.5 L / s (maximum expiratory flow rate), execute the action: activate LED units 1 - 12 (H = 180° - 360°, blue-green gradient).

[0089] 2.12. Exhalation phase trigger condition:

[0090] V > bV max And If b = 0.3 (exhalation trigger flow coefficient), execute the action: activate LED units 13 - 24 (H = 0° - 180°, red-orange gradient).

[0091] 2.2. Breathing intensity calculation

[0092] Calculate the breathing intensity index Q:

[0093]

[0094] Example: When V = 1.2 L / s and P = 15 cmH2O:

[0095]

[0096] Calculation of the number of lit units:

[0097]

[0098] The control module 40 sends a command to the rainbow light strip 20, and the corresponding LED unit 21 of the controller lights up.

[0099] 2.3. Multi-level light effect feedback

[0100] During the children's training process, the control module 40 provides progressive training guidance; the control module 40 dynamically adjusts the light effect mode according to the breathing intensity index Q;

[0101] 2.31. Basic mode:

[0102] Trigger condition: When the breathing intensity index satisfies Q < k2Q max (where k2 ∈ (0.2, 0.4) and Q max = 10.0 L2 / s 2 ), enter the basic light effect mode.

[0103] Light effect behavior:

[0104] Activate the first N LED units in sequence according to the calculated number of lit units

[0105] The brightness of each LED unit is controlled according to the linear attenuation formula:

[0106] L i = L MAX × (1 - k3|i - N|), (k3 ∈ [0.04, 0.06] is the attenuation coefficient)

[0107] Among them, i is the serial number of the LED unit 21 (i ≤ N total ≤ i), L MAX = 250 cd / m 2 ;

[0108] Example: When Q = 2.5 L 2 / s 2 ), The brightness of the first 6 LED units linearly decreases from 100% to 70%.

[0109] 2.32. Reinforcement mode:

[0110] Trigger condition: When the breathing intensity index satisfies 0.3Qmax ≤ Q < 0.7Qmax, the enhanced light effect mode is activated;

[0111] Light effect behavior:

[0112] Trigger the spiral light wave special effect, and the light wave propagates spirally along the rainbow light strip. The propagation speed v is positively correlated with the breathing intensity:

[0113] v = v0 + k5Q, (v0 ∈ [1, 3] cm / s, k5 ∈ [0.4, 0.6] is the speed gain)

[0114] Example: When Q = 5.0L 2 / s 2 , the light wave speed v = 2 + 0.5 × 5 = 4.5 cm / s.

[0115] The light wave color gradually changes from blue (H = 240°) to green (H = 120°), covering LED units 1 to N total .

[0116] 2.4. Adjustment of the flow-limiting regulating valve 50

[0117] The control module 40 executes the following determination logic to adjust the angle of the flow-limiting regulating valve 50;

[0118] Adjust the opening θ:

[0119]

[0120] where θ is the opening and closing angle, e is the natural constant, V max is the preset maximum flow rate, θ min ∈ [10°, 20°], θ max ∈ [70°, 90°], k6 ∈ [0.2, 0.4] is the curve steepness coefficient, and k7 ∈ [0.7, 0.9] is the flow rate offset coefficient;

[0121] Calculation example:

[0122] When V = 1.5L / s, V max = 2.5L / s:

[0123]

[0124] Low flow rate stage (V < 1.0L / s): The opening slowly increases (e.g., when V = 0.8L / s, θ ≈ 32°) to avoid sudden changes in resistance.

[0125] High flow rate stage (V > 1.8L / s): The opening quickly approaches θ max (e.g., when V = 2.0L / s, θ ≈ 84°) to reduce airway resistance.

[0126] 2.5 Sputum Viscosity Warning

[0127] The control module 40 receives the data detected by the vibration feedback device 35 and executes the following decision logic to evaluate abnormal airway resistance;

[0128] 2.51. Viscosity Index Calculation:

[0129]

[0130] where η is the viscosity index, T is the duration of a single exhalation, is the rate of change of expiratory flow velocity, and η th is the sputum viscosity threshold;

[0131] Example:

[0132] Assume that for a certain exhalation with T = 2 s and a rate of change of flow velocity and an average pressure P = 18 cmH2O:

[0133] η = (-0.8) 2 × 18 × 2 = 0.64 × 18 × 2 = 23.04

[0134] Warning Triggering and Response

[0135] When η > η th , the control module (40) performs an operation:

[0136] 2.52. Opening Adjustment of the Flow Limiting Regulating Valve 50:

[0137] Δθ = k8log 10 (η / η th )(k8 ∈ [4°, 6°], and 5° is taken in this embodiment)

[0138] Example:

[0139] Δθ = 5° × log 10 (23.04 / 2.5) = 5° × log 10 (9.216) ≈ 5° × 0.964 = 4.82°;

[0140] Optical Warning:

[0141] Superimpose a yellow halo on the lit LED unit, with a hue shift ΔH = +60°, ΔH ∈ [50°, 70°]);

[0142] The fluctuation amplitude of the halo brightness is ±30%, and the frequency f = 2 Hz.

[0143] By increasing the opening of the flow limiting regulating valve 50, the expiratory resistance is reduced, the breathing burden of children is relieved, and a prompt is given.

[0144] 2.6. Safety Policy

[0145] The control module 40 receives the data detected by the flow sensor 31 and the pressure sensor 32, and executes the following decision logic to prevent respiratory overload:

[0146] 2.61. Trigger Conditions:

[0147] Flow rate exceeds limit V > λ1V max (λ1 ∈ [1.1, 1.3] is the flow rate overlimit coefficient, and the example value is 1.2)

[0148] Pressure exceeds limit P > λ2P max (λ2 ∈ [0.8, 1.0] is the pressure overlimit coefficient, and the example value is 0.8, P max = 30 cmH2O);

[0149] Duration: continuous for t1 ∈ [2, 4] seconds, and the example value is 3 seconds.

[0150] 2.62. Response Actions:

[0151] The flow-limiting valve is fully opened: the opening degree θ = θ max = 90°, immediately reducing the expiratory resistance to the lowest;

[0152] Audible and visual alarm:

[0153] The buzzer 60 sounds at a frequency of f = 10 Hz (sound pressure level ≥ 85 dB @ 10 cm);

[0154] The rainbow light strip switches to alternate red and blue flashing (frequency 5 Hz, duty cycle 50%);

[0155] Example:

[0156] When V = 1.2 × 2.5 = 3.0 L / s, P = 0.8 × 30 = 24 cmH2O, and continuous for 3 seconds:

[0157] The flow-limiting valve is instantly fully opened to 90°, and the expiratory resistance drops to 15% of the initial value.

[0158] The buzzer 60 sounds at 10 Hz, and the LED flashes red and blue (red light H = 0°, blue light H = 240°, alternating interval 100 ms).

[0159] 2.7. Cleaning and Maintenance Reminder

[0160] The control module 40 receives the data detected by the humidity sensor 33, and executes the following decision logic to maintain the hygiene of the device:

[0161] 2.71. Humidity Detection:

[0162] Trigger condition: When the humidity RH inside the mouthpiece 11 > ρ1 (ρ1 ∈ [80%, 90%] is the humidity threshold, and 85% is taken as an example);

[0163] Response action:

[0164] The LED displays a blue breathing light effect, and the brightness fluctuates between 70% - 100% (the fluctuation range is ±30%, and the frequency is 0.5Hz)

[0165] The buzzer 60 gives a short prompt once every 5 minutes (0.2 seconds, frequency 1kHz);

[0166] 2.72. Cumulative usage time detection:

[0167] Trigger condition: The cumulative usage time t > τ (τ ∈ [25, 35] minutes, and 30 minutes is taken as an example).

[0168] Response action:

[0169] The buzzer sounds three short beeps continuously (each time for 0.2 seconds, with an interval of 0.5 seconds);

[0170] The entire section of the LED light strip displays a green breathing light effect (H = 120°, and the brightness fluctuates ±20%).

[0171] Operation example:

[0172] Scenario 1: After continuous use, the humidity sensor 33 detects RH = 88%:

[0173] The rainbow light strip 20 switches from the current light effect to blue breathing (H = 240°, and the brightness fluctuates 70% - 100%).

[0174] The buzzer 60 gives a "beep" sound to prompt for cleaning.

[0175] Scenario 2: The cumulative training time reaches 32 minutes:

[0176] The buzzer 60 gives a "beep - beep - beep" prompt sound, and the rainbow light strip 20 displays a green breathing light effect.

[0177] The control module 40 locks the operation until the device is restarted.

[0178] 2.8. Mobile terminal interaction implementation

[0179] 2.81. The control module 40 interacts with the external mobile terminal through the data communication module 70 and performs the following functions:

[0180] Data visualization:

[0181] Generate a breathing training curve on the mobile APP, with the horizontal axis being time and the vertical axis synchronously displaying the Q value, the number of LED lights N lit, and the opening degree θ of the flow limiting valve;

[0182] Rainbow light effect dynamic simulation: reproduce the real-time color change of the device's LED light strip on the APP interface.

[0183] Intelligent reminder and report:

[0184] Training frequency statistics: summarize the effective training times by day / week / month, and mark the Q max achievement rate of each training.

[0185] Next training reminder: intelligently push notifications based on the historical training interval (such as reminding at a fixed time every day or at an interval of 24 hours).

[0186] Sputum risk report: generate a risk reminder and recommend medical treatment when accumulated.

[0187] Parent control function:

[0188] Safety threshold setting: remotely adjust Q max , η th and other parameters to adapt to children of different ages.

[0189] Training duration limit: set the maximum single use time (default 30 minutes), and the device will be automatically locked after timeout.

[0190] 2.82. Expansion of operation process

[0191] Mobile terminal linkage operation

[0192] Device binding:

[0193] Open the mobile APP, set the QR code on the training instrument body 10, and complete the pairing by scanning the QR code on the training instrument body 10;

[0194] Real-time monitoring:

[0195] The real-time breathing curve is displayed on the main interface of the APP, and the rainbow light effect simulation bar is dynamically filled with the training progress;

[0196] Historical review:

[0197] Click "Training Record" to view historical data, and support filtering by Q value and sputum risk level;

[0198] Remote setting:

[0199] Adjust the safety threshold in the "Parent Mode", and the modified parameters will be instantly synchronized to the training instrument.

[0200] 3. Summary

[0201] The children's breathing trainer disclosed in this embodiment significantly improves the compliance and effectiveness of children's breathing rehabilitation training through an innovative rainbow light effect guidance system and intelligent breathing feedback technology. The device can monitor the breathing intensity in real time and dynamically adjust the training resistance, and immediately trigger multi-level safety protection in abnormal breathing states (such as airflow overload or sputum retention), effectively reducing the operation risk; combined with the mobile terminal data synchronization function, breathing parameters, training frequency and sputum risk index can be transmitted to the mobile phone APP in real time. Parents can track the training progress through the visualization curve and receive intelligent push reminders for the next training. The hygienic design ensures safe use, and the compact structure and adaptive resistance adjustment are optimized for children's physiological characteristics. This design extends the active training time of children by 40%, improves the sputum clearance efficiency by 34%, and reduces the breathing overload accident rate to less than 1%. Combined with the remote monitoring and personalized settings on the parent side, it provides an efficient, reliable and highly interactive intelligent solution for pediatric breathing rehabilitation.

Claims

1. A children's breathing trainer with a status prompt function, characterized in that, Comprising: A training device body (10), with a mouthpiece (11) for sealing connection with a child's mouth at its front end, and a flow-limiting regulating valve (50) for adjusting the expiratory resistance at the air flow outlet at the rear end. Integrated in the middle are: A respiration detection module (30): including a differential pressure flow sensor (31) and a pressure sensor (32), respectively used to detect the expiratory flow velocity V and airway pressure P; A humidity sensor (33): used to monitor the humidity RH inside the mouthpiece (11); An inertial sensor (34): used to detect the head elevation angle β; A vibration feedback device (35): used to detect the sputum viscosity index η; Rainbow light strip (20): longitudinally attached to the outer wall of the trainer body (10), including N total individual (N total ≥ 12) independent LED units (21), arranged in an arithmetic progression according to the hue angle H, for reflecting the breathing intensity by the number of lit units; A flow-limiting regulating valve (50): installed at the air flow outlet at the end of the training device body (10), used to adjust the expiratory resistance; A control module (40): fixed in the circuit compartment in the middle of the training device body (10), used to process the data of the respiration detection module (30) and control the light effect and gas flow; A buzzer (60): integrated at the tail of the training device body (10), used to give a safety alarm; A data communication module (70): integrated on the control module (40), supporting Bluetooth or Wi-Fi wireless transmission, used for the interaction between the control module (40) and an external mobile terminal; The control module (40) is programmed to perform respiration stage recognition, multi-level light effect feedback, sputum viscosity early warning, light effect control, posture compensation and safety strategy.

2. The children's breathing trainer with a status prompt function according to claim 1, characterized in that, The control module (40) performs respiration stage recognition to distinguish between the inhalation and exhalation stages: When V > aV max (where a ∈ (0.4, 0.6) is the inspiration trigger flow rate coefficient), and the flow rate change rate is satisfied, activate the blue-green segment LED unit (21) (H = 180° - 270°); When V > bV max (where b ∈ (0.2, 0.4) is the expiratory trigger flow coefficient), and the flow rate change rate Activates the red - orange segment LED unit (21) (H = 0° - 90°); Calculate the respiratory intensity index (where k1 ∈ [0.2, 0.3] is the pressure weight coefficient and Q is the respiratory intensity index), and control the number of illuminated units 3. The children's breathing trainer with a status prompt function according to claim 2, characterized in that, The control module (40) implements multi-level light effect feedback to provide progressive training guidance: Basic mode (Q < k2Q max , where k2 ∈ (0.2, 0.4) is the basic mode threshold coefficient): The LED units (21) are lit in the order of N values, and the brightness L i = L MAX ×(1 - k3∣i - N∣) (where k3 ∈ [0.04, 0.06] is the attenuation coefficient and i is the serial number of the LED unit (21)), and L MAX is the maximum brightness; Enhanced mode (Q ≥ k4Q max , where k4 ∈ (0.6, 0.8) is the enhanced mode threshold coefficient): Trigger a spiral light wave with a propagation speed v = v0 + k5Q (v0 ∈ [1, 3] cm / s, k5 ∈ [0.4, 0.6] is the speed gain).

4. The children's breathing trainer with a status prompt function according to claim 1, characterized in that, The control module (40) controls the opening degree of the flow-limiting regulating valve (50) to achieve non-linear resistance adjustment: Opening degree where θ is the opening and closing angle, e is the natural constant, and V max is the preset maximum flow velocity, and θ min ∈ [10°, 20°], θ max ∈ [70°, 90°], k6 ∈ [0.2, 0.4] is the curve steepness coefficient, and k7 ∈ [0.7, 0.9] is the flow velocity offset coefficient.

5. The children's breathing trainer with a status prompt function according to claim 2, characterized in that, The control module (40) performs sputum viscosity early warning to evaluate abnormal airway resistance: Calculate the viscosity index (η is the viscosity index, and T is the duration of a single exhalation). When η > η th (η th ∈[2.0, 3.0] kPa·s 2 is the sputum viscosity threshold): Adjust the opening of the flow-limiting regulating valve (50) to increase by Δθ = k8log 10 (η / η th )(where k8 ∈ [4°, 6°] is the opening adjustment amount); Trigger the hue shift ΔH ∈ [50°, 70°] of the LED unit (21).

6. The children's breathing trainer with a status prompt function according to claim 1, characterized in that, The control module (40) implements posture compensation to correct the detection error caused by improper body position: Detect the head elevation angle β through the inertial sensor (34): When β < γ1 (γ1 ∈ [8°, 12°]), the respiration intensity is corrected to Q′ = Q × (1 + k9sinβ) (k9 ∈ [0.08, 0.12]); When β > γ2 (γ2 ∈ [40°, 50°]), force the lowest number of LED units (21) (k 10 ∈ [0.4, 0.6] is the lowest lighting ratio coefficient).

7. A children's breathing trainer with a status prompt function according to claim 1, characterized in that, The control module (40) performs a safety strategy to prevent respiratory overload: When all of the following are satisfied simultaneously: Flow velocity exceeds the limit, V > λ1V max (λ1 ∈ [1.1, 1.3] is the flow velocity overlimit coefficient), lasting for t1 ∈ [2, 4] seconds; Pressure overlimit: P > λ2P max (where λ2 ∈ [0.8, 1.0] is the pressure overlimit coefficient); then execute: The flow-limiting regulating valve (50) is fully opened to θ = θ max ; The buzzer (60) alarms at a frequency f ∈ [8, 12] Hz; The rainbow light strip (20) switches to a two-color alternating flashing mode.

8. A children's breathing trainer with a status prompt function according to claim 1, characterized in that The control module (40) integrates a cleaning reminder to maintain the hygiene of the device: When the humidity sensor (33) detects that RH > ρ1 (ρ1 ∈ [80%, 90%] is the humidity threshold), the blue LED unit (21) displays a respiration light effect (brightness fluctuates ±30%); When the cumulative usage time t > τ (τ ∈ [25, 35] minutes), trigger the buzzer (60) for 3 short prompts.

9. The children's breathing trainer with a status prompt function according to claim 1, characterized in that The interaction function of the data communication module (70) with an external mobile terminal includes: Training report generation: generating a visual report containing the change trend of the rainbow light effect and the sputum risk index based on respiration data; Intelligent reminder: pushing a recommended next training time through the mobile terminal according to the historical training frequency; Parental control: Set the safety threshold for breathing intensity (Q max ) and the limit for the duration of a single training session.

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