Mask breathing state judgment method and system based on breathing machine

Abstract

The invention relates to the technical field of breathing masks, in particular to a mask breathing state judgment method and system based on a breathing machine. Judging an inspiration state and an expiration state by using the respiratory flow value; and the humidifier and the mask air leakage device are controlled to work according to the breathing state. The problems that an existing mechanical mask cannot accurately know the expiration or inspiration state of a patient, and electric energy and medicine are wasted are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of breathing masks, and in particular to a method and system for judging the breathing state of a mask based on a ventilator. Background Art

[0002] The ventilator mask plays a key role in ventilator therapy. It not only ensures the effective delivery of gases, but also improves patient comfort and treatment compliance, while reducing the occurrence of complications.

[0003] Compared with traditional mechanical ventilation, high-frequency oscillation ventilation has the advantages of reducing lung damage and improving gas exchange. High-frequency oscillation ventilation improves small airway patency and uniform alveolar ventilation through high-frequency and small tidal volume oscillations, reduces collapse and mechanical damage, improves gas exchange efficiency and protects lung structure.

[0004] Although high-frequency oscillation ventilation can effectively change the ventilation effect of small airways and alveoli, compared with elderly patients and patients with severe COPD, their breathing ability is weaker and their sputum is more difficult to dilute and discharge normally. The application of high-frequency oscillation ventilator to mechanical mask has the following shortcomings:

[0005] 1. Mechanical masks cannot accurately detect the patient's breathing or exhalation status;

[0006] 2. The humidifier in the mechanical mask is always working, which wastes electricity and medicine;

[0007] 3. Mechanical masks cannot tell whether exhalation and inhalation are balanced;

[0008] 4. Mechanical masks cannot adjust the temperature and humidity inside the mask. Summary of the invention

[0009] In view of the shortcomings of the existing methods, the present invention solves the above-mentioned problems of the existing mechanical masks.

[0010] The technical solution adopted by the present invention is: a method for judging the breathing state of a mask based on a ventilator comprises the following steps:

[0011] Step 1, obtaining the respiratory flow value within the sampling period;

[0012] As a preferred implementation of the present invention, a respiratory flow fitting function is constructed to obtain a respiratory flow value.

[0013] Step 2: Use the respiratory flow value to determine the inhalation state and exhalation state;

[0014] As a preferred embodiment of the present invention, step 2 specifically includes:

[0015] Step 21, setting the breathing start state, when the respiratory flow value is greater than the inhalation threshold, it is judged as an inhalation rise;

[0016] Step 22: When the difference between the respiratory flow value at the next moment and the respiratory flow value at the previous moment is less than 0, it is in the inhalation hold state;

[0017] Step 23: When the inhalation hold time is greater than the predicted inhalation hold time, it is the inhalation descent start state;

[0018] Step 24: when the respiratory flow value at a certain moment is less than the exhalation threshold, determine the exhalation state;

[0019] Step 25: When the respiratory flow value at a certain moment is greater than 0 and less than the inhalation threshold, the breathing cycle ends.

[0020] Step 3: Control the operation of the humidifier and the mask air leaker according to the inhalation state and the exhalation state;

[0021] As a preferred embodiment of the present invention, step three specifically includes:

[0022] When inhaling, the humidifier is turned on and the mask leak is closed; when in exhaling, the humidifier is turned off and the mask leak is turned on.

[0023] As a preferred embodiment of the present invention, it also includes: step 4, obtaining the leakage value of the mask within the sampling period, and judging whether the inhalation volume and the exhalation volume are balanced.

[0024] As a preferred embodiment of the present invention, step 4 specifically includes:

[0025] Collect the voltage signal value corresponding to the pressure inside the mask, construct the mask pressure fitting function, and predict the pressure value inside the mask under the exhalation state;

[0026] The pressure value inside the mask in the exhalation state is used as input, and the mask leakage fitting function is used to determine whether the inhalation volume and exhalation volume are balanced.

[0027] As a preferred embodiment of the present invention, a system for judging the breathing state of a mask based on a ventilator includes:

[0028] Controllers, humidifiers, flow sensors, relays and mask leak detectors,

[0029] The flow sensor is used to collect the voltage signal during the breathing state;

[0030] The relay is used to control the operation of the mask air leaker and humidifier;

[0031] The mask leak device is used to discharge the exhaled air in the mask;

[0032] The humidifier is used to humidify the medicine by atomization;

[0033] The controller is used to calculate the respiratory flow value and control the opening or closing of the mask leak device and humidifier according to the respiratory status.

[0034] As a preferred embodiment of the present invention, it also includes: a mask pressure sensor for collecting pressure voltage signals in the mask, and a controller determines whether the inhalation volume and the exhalation volume are balanced according to the mask leakage value.

[0035] As a preferred embodiment of the present invention, it also includes: a temperature sensor for collecting the temperature value inside the mask.

[0036] As a preferred embodiment of the present invention, it also includes: a humidity sensor for collecting the humidity value in the mask.

[0037] Beneficial effects of the present invention:

[0038] 1. Construct an exhalation and inhalation judgment method to accurately determine the exhalation stage and the inhalation stage, and use it to analyze whether the exhalation and inhalation processes are balanced;

[0039] 2. Use the exhalation and inhalation stages to control the coordinated work of the humidifier and the mask leak detector to improve drug utilization and reduce power consumption;

[0040] 3. Predict the leakage value and effectively judge whether the inspiratory volume and expiratory volume are balanced;

[0041] 4. Monitor the temperature and humidity levels inside the mask through temperature and humidity sensors to avoid inhaling excessively dry or humid gases, protect the respiratory mucosa, and reduce the discomfort and inflammation risks caused by dryness. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a breathing state flow chart of the present invention;

[0043] Figure 2 It is a flow chart of the respiratory state humidification and air leakage control of the present invention;

[0044] Figure 3 This is a connection diagram of a mask breathing state judgment system based on a ventilator;

[0045] Figure 4 is a circuit diagram of the controller of the present invention;

[0046] Figure 5 is a circuit diagram of a mask pressure sensor of the present invention;

[0047] Figure 6 It is a relay circuit diagram of the present invention;

[0048] Figure 7 It is a circuit diagram of a serial communication module of the present invention;

[0049] Figure 8 It is a circuit diagram of a power supply voltage stabilizing module of the present invention;

[0050] Fig. 9 is a schematic diagram of a mask of the present invention;

[0051] Fig.10 is the respiratory flow fitting function curve of the present invention;

[0052] Fig.11 is the mask pressure fitting function curve of the present invention;

[0053] Fig.12 is the hood leakage fitting function curve of the present invention;

[0054] Fig.13 This is a normal breathing test chart;

[0055] Fig.14 It is a test chart of the bi-level ventilation state of the ventilator;

[0056] Fig.15 This is the ventilator high frequency oscillation ventilation state test chart

[0057] Fig. 9 Among them, 1. Hardware circuit board, 2. Mask pressure sensor, 3. Mask pressure output connecting tube, 4. Relay, 5. Lithium battery pack, 6. Mask body, 7. Mask strap, 8. Humidifier, 9. Humidifier driver board, 10. Mask leak detector, 11. Mask connector, 12. Flow sensor; 13. Temperature and humidity sensor. DETAILED DESCRIPTION

[0058] The present invention is further described below in conjunction with the accompanying drawings and embodiments. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore it only shows the components related to the present invention.

[0059] like Figure 1 As shown, the method for judging the breathing state of a mask based on a ventilator comprises the following steps:

[0060] Step 1, obtaining the respiratory flow value within the sampling period;

[0061] The flow sensor is used to collect the voltage signal of the person in the breathing state, and the respiratory flow fitting function is constructed to obtain the respiratory flow value;

[0062] The formula for the respiratory flow fitting function is:

[0063] y1=a1*x1-b1 (1)

[0064] Among them, a1 and b1 are fitting coefficients, and x1 is the voltage signal value under the breathing state.

[0065] like Fig.10 As shown in the figure, the sampling period is 20ms, the voltage signal value and the corresponding respiratory flow rate under the respiratory state within 5 minutes are collected, and the relationship between the voltage signal and the respiratory flow rate is fitted using a one-dimensional linear fitting function; a1=101.2, b1=255.2; fitting R 2 =0.9996, residual norm =9.788, indicating high fitting accuracy.

[0066] Step 2: Use the respiratory flow value to determine the inhalation state and exhalation state;

[0067] Step 2 specifically includes:

[0068] Step 21, the initial state is the breathing start state, which is the state before the inhalation rises, at which time no exhalation and inhalation actions are performed, and the respiratory flow value is calculated to see whether it is greater than the inhalation threshold;

[0069] When the respiratory flow value of a certain sampling period is greater than the inhalation threshold of 10L / min, it is judged as the inhalation rising state after wearing the breathing mask; and the inhalation rising time t1 is recorded;

[0070] For example, when the respiratory flow rate is 11 L / min at t = 0 ms, 13 L / min at t = 20 ms, and 38 L / min at t = 2000 ms, the time t1 of the inspiratory rising state is 2 s;

[0071] The inspiratory threshold is a custom parameter, 10±2L / min.

[0072] Step 22, calculating the difference between the respiratory flow value at the next moment and the previous moment, when the difference between the respiratory flow at the next moment minus the respiratory flow at the previous moment is less than 0, it is an inhalation hold state, and calculating the inhalation hold time t2;

[0073] Step 23, setting the predicted inhalation hold time;

[0074] Inspiratory hold is the stage of slow inspiratory volume during inhalation. The predicted inspiratory hold time t xt =t1*n, n is the correction coefficient. Different correction coefficients can be set for different genders, ages and states, n=0.1 to 1.5;

[0075] The inspiratory hold time t2 is compared with the predicted inspiratory hold time t xt For comparison, when t2>t xt It is the starting state of inhalation and descent;

[0076] For example: 10-year-old girl t1 = 3s, t xt =0.6s, when the inhalation holding time is greater than 0.6s, it is the inhalation descending starting state;

[0077] The inspiratory descent state is an important stage for identifying the respiratory cycle. It not only marks the gradual end of inhalation and the preparation for the transition to exhalation, but this process is also crucial for the completion of gas exchange and the pressure balance in the airway. By accurately judging the inspiratory descent point, the high-frequency oscillating airflow can be better coordinated to avoid the mismatch between the patient's spontaneous breathing and the equipment's air supply.

[0078] Step 24: when the respiratory flow value at a certain moment is less than the exhalation threshold, determine the exhalation state;

[0079] The exhalation threshold is a custom parameter and is set to 0±0.1L / min;

[0080] The inhalation state ends and the entire inhalation time is calculated; then the exhalation state begins;

[0081] Step 25: When the respiratory flow value at a certain moment is greater than 0 and less than the inhalation threshold, a respiratory cycle ends and the next respiratory cycle is judged;

[0082] By counting the time ratio of exhalation and inhalation, and whether the inhalation process conforms to the rules of inhalation rise, inhalation hold and inhalation fall, the person's state can be judged and monitored;

[0083] For patients with respiratory diseases, the inhalation process usually does not meet the standards of normal people. Step 2 can be used to monitor the person's condition.

[0084] like Figure 2 ,Step 3, control the operation of the humidifier and the mask air leaker according to the breathing state;

[0085] Step three specifically includes:

[0086] When inhaling, the humidifier turns on and the mask leak detector stops working; when in exhaling, the humidifier stops working and the mask leak detector starts working.

[0087] The opening and closing states of the mask leak are adjusted by a relay; when inhaling, the mask leak is in a closed state, the humidifier is turned on to atomize the medicine, and the high-frequency oscillating ventilator uses high-frequency oscillating airflow to deliver the atomized medicine mist to the small airways and alveoli; when exhaling, the mask leak is in an open state, and the humidifier is turned off to avoid wasting medicine and consuming electricity of the humidifier.

[0088] The invention also includes: step 4, obtaining the air leakage value of the mask within the sampling period, and judging whether the inhaled air volume and the exhaled air volume are balanced;

[0089] Step 4 specifically includes:

[0090] like Fig.11Step 41: Use the mask pressure sensor to collect the voltage signal value corresponding to the pressure inside the mask, and construct a mask pressure fitting function, the formula is:

[0091] y2=a2*x2-b2 (2)

[0092] Among them, a2 and b2 are fitting coefficients, x2 is the voltage signal value inside the mask in the exhalation state, and y2 is the pressure value inside the mask in the exhalation state.

[0093] In this embodiment, a2=26.09, b2=65.21, R 2 =0.9986, residual norm =0.8192.

[0094] Step 42, using the pressure value inside the mask as input, calculating the mask leakage;

[0095] like Fig.12 , construct the mask leakage fitting function, the formula is:

[0096] y3=a3*y2 3 -b3*y2 2 +c3*y2+d3 (3)

[0097] Among them, a3, b3, c3, d3 are fitting coefficients, y2 is the pressure value inside the mask in the exhalation state, y2 is the pressure value inside the mask in the exhalation state, and y3 is the mask leakage value; a3 = 0.124, b3 = 3.063, c3 = 27.64, d3 = 11.29; R 2 =1, residual norm = 9.552e-13.

[0098] Whether the inspiratory volume and expiratory volume are balanced can be determined by calculating the inspiratory volume y 1 1 and the mask leakage value y3 for judgment.

[0099] Inspiratory volume 1 1 can be obtained by calculating the cumulative respiratory flow value at each moment of the inspiratory phase using formula 1.

[0100] like Figure 3 The system of the method for judging the breathing state of the mask of the ventilator comprises:

[0101] A controller, a flow sensor, a humidifier, a relay and a mask leak detector, wherein the flow sensor and the relay are electrically connected to the controller, and the mask leak detector and the humidifier are electrically connected to the relay; wherein,

[0102] The flow sensor is used to collect the voltage signal during the breathing state;

[0103] The relay is used to control the opening or closing of the mask leak detector and humidifier;

[0104] The mask leak is used to discharge the exhaled air in the mask;

[0105] The humidifier is used to humidify the medicine by atomization;

[0106] The controller is used to calculate the respiratory flow value and control the opening and closing of the mask leak device and humidifier according to the respiratory status.

[0107] The flow sensor uses a gas flow mass sensor, model: FS6122.

[0108] It also includes: a mask pressure sensor, which is electrically connected to the controller. The mask pressure sensor is used to collect pressure and voltage signals in the mask. The controller is used to calculate the mask leakage value and determine whether the inhalation volume and the exhalation volume are balanced.

[0109] It also includes a power supply. The controller can be connected to the host computer through a USB interface, and the power is provided through the USB interface of the host computer. The USB interface transmits to the LabVIEW host computer port through the serial port for visual display and data storage; the serial port transmission is transmitted through the serial communication module, such as Figure 7 As shown, resistor R1 is connected in series with light-emitting diode RX and resistor R3 and then connected to the second pin of serial port chip U4, R2 is connected in series with light-emitting diode TX and R4 and then connected to the third pin of U4, the left ends of R1 and R2 are connected to resistor R5 and light-emitting diode ON1 and then grounded, the fourth pin of U4 is connected to capacitor C8 and then grounded, the sixteenth pin of U4 is connected to capacitor C9 and then grounded, the thirteenth pin of U4 is connected to capacitor C10 and then connected to the RST pin of U6, and communicates with the controller through the RST pin.

[0110] The power supply can also be a battery pack, which is connected to the controller through a power supply voltage regulator module to provide a 5V voltage to the controller; Figure 8 As shown, the cable arrangement device H7 is connected to the battery pack, and SW3 is a switching switch. When the external power supply is the host computer, SW3 is closed; when the external power supply is not the host computer, SW3 is opened.

[0111] like Figure 4 , the controller U6 uses a single-chip microcomputer, model ATMEGA328P-AU; pin A2 is connected to the flow sensor; pin A3 is connected to the mask pressure sensor, the model of the mask pressure sensor is XGZP6847A005KPG; Figure 5 is the circuit diagram of the mask pressure sensor U2;

[0112] The controller's pin IN1 is connected to a relay. Figure 6As shown, the cable arranging device H1 is connected to the IN1 pin of the controller, C3 and C4 are connected in parallel and then connected to the 2nd and 3rd pins of H1, the 1st pin of H1 is connected to R9 and then connected to the base of the transistor Q1, the emitter of Q1 is grounded, and the collector of Q1 is connected to the 8th pin of K1.

[0113] The model of the humidifier is QDB-1, the rated voltage is 5v, the rated current is 300mA, the resonant frequency is 108-110KHz, and the humidifier is connected to pin 3 of H3 of the relay, that is, NO1.

[0114] Humidifiers convert expectorant drugs into tiny aerosol particles through atomization, which are easier for patients to inhale and can be delivered to the small airways and alveoli in the lungs through the airways. The high-frequency airflow generated by high-frequency oscillation ventilation combines with the atomized drug particles to more effectively deliver the drug into deep structures such as the small airways and alveoli, thereby enhancing the range of drug action. Nebulized drugs usually contain ingredients that dissolve sputum or reduce sputum viscosity (such as acetylcysteine). The shear force of the oscillating airflow can help break down and dilute sputum, and cooperate with drugs to make sputum easier to expel. In addition to expectorant drugs, humidifiers can also be used to deliver antibiotics and hormone drugs to meet the treatment needs of different patients.

[0115] The mask leak detector uses a miniature push-pull solenoid valve with a rated voltage of 5v, which is connected to pin 3 of relay H5, i.e. NC2.

[0116] When the patient exhales, the mask leak opens, allowing the exhaled air flow to be discharged smoothly outside the mask to prevent the air pressure inside the mask from being too high. This can avoid pressure accumulation inside the mask and ensure smooth discharge of air flow.

[0117] When the patient inhales, the mask leak detector closes to ensure that the inhaled airflow does not leak out of the mask, thereby maximizing the efficiency of airflow transmission and ensuring effective drug intake; by preventing gas leakage, the patient can inhale enough airflow to meet breathing needs and ensure the effectiveness of respiratory support; the mask leak detector adjusts the airflow to ensure that the airflow inside the mask is not too intense or unstable during the patient's breathing process, reducing the discomfort caused by airflow leakage and enhancing the patient's comfort when wearing the mask; during high-frequency oscillation ventilation treatment, the mask leak detector helps to maintain the stability of the airflow in the mask to avoid excessive discharge of airflow during exhalation that affects the formation and transmission of oscillating airflow; the mask leak detector works in conjunction with other sensors and humidifiers to ensure optimal airflow control for each inhalation and exhalation.

[0118] Also included: a temperature sensor for collecting the temperature value inside the mask;

[0119] Also included: a humidity sensor for collecting humidity values ​​in the mask;

[0120] The temperature sensor and the humidity sensor may be an integrated temperature and humidity sensor.

[0121] The temperature sensor and humidity sensor are connected to pins 10 and 13 of the controller respectively; the temperature and humidity sensor monitors the humidity level in the mask to prevent the inhaled gas from being too dry or humid, protect the respiratory mucosa, and reduce the discomfort and inflammation risk caused by dryness; real-time monitoring of the temperature in the mask ensures that the inhaled gas is within an appropriate temperature range; the temperature and humidity sensor can detect abnormal environmental changes caused by respiratory problems (such as excessive humidity or abnormal temperature) and provide an alarm or adjustment basis for the equipment; when the temperature and humidity in the mask exceed the safe range, an alarm is issued in time or the heater is automatically turned off to protect the patient; the temperature and humidity sensor provides feedback data, and the humidifier and heater in the ventilator or mask can be intelligently adjusted based on these data to maintain a constant temperature and humidity environment.

[0122] like Fig. 9 The mask schematic includes a hardware circuit board, a mask pressure sensor, a mask pressure output connecting tube, a relay, a lithium battery pack, a mask body, a mask strap, a humidifier, a humidifier driver board, a mask air leak detector, a mask connector, a flow sensor, and a temperature and humidity sensor;

[0123] The controller chip is integrated on the hardware circuit board;

[0124] Among them, the lithium battery pack supplies 5V power to the hardware circuit board, the mask pressure sensor cooperates with the mask pressure output connecting tube and the mask body to measure the pressure inside the mask; the relay is connected to the humidifier, and the humidifier includes a humidifier body and a humidifier driver; the relay is connected to the mask leak detector and cooperates with the mask connector to work; the flow sensor is connected to the mask connector and the mask body to measure the mask ventilation flow; the temperature and humidity sensor is connected to the hardware circuit board to measure the temperature and humidity signals inside the mask; the mask leak detector and the mask connector cooperate to fix the mask on the patient's face.

[0125] In addition to lithium battery packs, wireless charging modules can also be used as power sources, thereby effectively reducing the overall weight of the mask.

[0126] Specific experiments:

[0127] like Fig.13 , 14, 15, are the upper computer display diagrams of the breathing mask in normal breathing state, bi-level ventilation state and high-frequency oscillation ventilation state, respectively, the measured respiratory flow, pressure inside the mask, breathing state, leakage, humidifier action, mask leakage action, temperature and humidity test result diagram; it can intuitively display the mask's ability to accurately identify the user's breathing action through changes in respiratory flow, and control the working status of the humidifier and leakage device in real time; the working status of the humidifier and the mask leakage device are respectively represented by "1" for working and "-1" for not working, and the control response is fast and accurate. The pressure sensor inside the mask works normally and can measure the pressure changes inside the mask in real time. The leakage flow is accurately calculated by the fitting formula of the pressure inside the mask and the leakage amount of the mask, indicating that the mask sealing performance test is good. The temperature and humidity sensor operates stably and can accurately monitor the temperature and humidity inside the mask. The data changes are in line with experimental expectations. The experiment verifies the stability and functionality of the breathing mask under different ventilation modes. The mask can recognize breathing movements in real time, accurately control the movements of key modules, and ensure the accuracy and reliability of sensor monitoring, providing comprehensive protection for the patient's effective ventilation and comfort.

[0128] The ventilator may be an existing ventilator or a high-frequency oscillation ventilator with a publication number of CN118697985A.

[0129] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for judging the breathing state of a mask based on a ventilator, characterized in that: The following steps are involved: Step 1, obtaining the respiratory flow value within the sampling period; Step 2: Use the respiratory flow value to determine the inhalation state and exhalation state; Step 3: Control the operation of the humidifier and the mask air leaker according to the inhalation state and the exhalation state.

2. The method for judging the breathing state of a mask based on a ventilator according to claim 1, characterized in that: Step 2 specifically includes: Step 21, setting the breathing start state, when the respiratory flow value is greater than the inhalation threshold, it is judged as an inhalation rise; Step 22: When the difference between the respiratory flow value at the next moment and the respiratory flow value at the previous moment is less than 0, it is in the inhalation hold state; Step 23: When the inhalation hold time is greater than the predicted inhalation hold time, it is the inhalation descent start state; Step 24: when the respiratory flow value at a certain moment is less than the exhalation threshold, determine the exhalation state; Step 25: When the respiratory flow value at a certain moment is greater than 0 and less than the inhalation threshold, the breathing cycle ends.

3. The method for judging the breathing state of a mask based on a ventilator according to claim 1, characterized in that: Step three specifically includes: When inhaling, the humidifier is turned on and the mask leak is closed; when in exhaling, the humidifier is turned off and the mask leak is turned on.

4. The method for judging the breathing state of a mask based on a ventilator according to claim 1, characterized in that: Construct a respiratory flow fitting function to obtain the respiratory flow value.

5. The method for judging the breathing state of a mask based on a ventilator according to claim 1, characterized in that: The method also includes: Step 4, obtaining the air leakage value of the mask within a sampling period, and determining whether the inhaled volume and the exhaled volume are balanced.

6. The method for judging the breathing state of a mask based on a ventilator according to claim 5, characterized in that: Step 4 specifically includes: Collect the voltage signal value corresponding to the pressure inside the mask, construct the mask pressure fitting function, and predict the pressure value inside the mask under the exhalation state; The mask pressure value in the exhalation state is used as input, and the mask leakage fitting function is used to predict the mask leakage to determine whether the inhalation volume and exhalation volume are balanced.

7. A system using the method for judging the breathing state of a mask based on a ventilator according to claims 1 to 6, characterized in that: include: Controller, humidifier, flow sensor, relay and mask leak detector; among them, The flow sensor is used to collect the voltage signal during the breathing state; The relay is used to control the operation of the mask air leaker and humidifier; The mask leak device is used to discharge the exhaled air in the mask; The humidifier is used to humidify the medicine by atomization; The controller is used to calculate the respiratory flow value and control the opening or closing of the mask leak device and humidifier according to the respiratory status.

8. The system for judging the breathing state of a ventilator based on a mask according to claim 7, characterized in that: Also includes: The mask pressure sensor is used to collect the pressure voltage signal inside the mask.

9. The system for judging the breathing state of a ventilator based on a mask according to claim 7, characterized in that: Also includes: The temperature sensor is used to collect the temperature value inside the mask.

10. The system for judging the breathing state of a ventilator based on a mask according to claim 7, characterized in that: Also includes: Humidity sensor, used to collect humidity values ​​inside the mask.

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