Baby lead-free piezoelectric ceramic atomization monitoring equipment and monitoring method thereof

Abstract

The invention discloses infant lead-free piezoelectric ceramic atomization monitoring equipment and a monitoring method thereof, belongs to the technical field of atomization equipment, and integrates a lead-free piezoelectric ceramic atomization sheet driving technology, a respiration monitoring technology, a liquid medicine spray temperature control technology and a data display and diagnosis technology. The equipment comprises a host, a medicine cup, an atomization mask and an adjustable elastic bandage, and the host is provided with a driver, a respiration sensor and a display screen and is responsible for equipment control and data acquisition; the medicine cup is provided with a lead-free piezoelectric ceramic atomization piece, a temperature sensor and a heating diaphragm and used for achieving atomization and temperature control of liquid medicine. The control unit carries out deep filtering processing on the respiration signals through an advanced algorithm, and the quality and integrity of the signals are ensured. The invention aims to solve the defects of safety problem, lack of abnormal breathing monitoring, insufficient diagnostic information, low atomization efficiency, inaccurate liquid medicine spray temperature control and the like in the traditional infant atomization equipment, and realizes safe and efficient atomization treatment and comprehensive monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of atomization equipment, and in particular to an infant lead-free piezoelectric ceramic atomization monitoring device and a monitoring method thereof. Background Art

[0002] As a non-invasive, direct-drug delivery method, aerosol inhalation therapy is widely used to treat respiratory diseases in infants and young children, such as asthma and bronchitis. Traditional aerosol devices use lead-containing piezoelectric ceramic atomizers. Long-term use can release heavy metal ions, posing a potential health threat to infants and young children, a sensitive group. Summary of the Invention

[0003] In order to overcome the defects of the prior art, one object of the present invention is to provide a lead-free piezoelectric ceramic atomization monitoring device for infants to solve the above-mentioned problems.

[0004] In order to overcome the defects of the prior art, another object of the present invention is to provide a lead-free piezoelectric ceramic atomization monitoring method for infants to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a lead-free piezoelectric ceramic atomization monitoring device for infants, comprising a main unit, a medicine cup, an atomization mask, and an adjustable elastic strap. The main unit is detachably mounted below the medicine cup, the main unit is connected to the medicine cup via a buckle, the main unit and the medicine cup are both connected to the front side of the atomization mask, and the adjustable elastic strap is connected to the atomization mask. The host is provided with a driver, which is installed inside the host. The driver includes a control unit and a lead-free piezoelectric ceramic atomizer drive module; the lead-free piezoelectric ceramic atomizer drive module includes an NPN MOS tube Q1, a current limiting resistor R1, a current sampling resistor R4, an inductor L2, a capacitor C4, a filter capacitor C12 and a filter capacitor C13; The PWM output terminal of the control unit is electrically connected to the G terminal of the NPN MOS transistor Q1 through the current limiting resistor R1, the D terminal of the NPN MOS transistor Q1 is electrically connected to the negative electrode of the lead-free piezoelectric ceramic atomizer, and the S terminal of the NPN MOS transistor Q1 is grounded through the current sampling resistor R4; the S terminal of the NPN MOS transistor Q1 is also electrically connected to the current acquisition terminal ADC of the control unit; The positive electrode of the lead-free piezoelectric ceramic atomizer is respectively connected to one end of the filter capacitor C13 and the filter capacitor C12, the other end of the filter capacitor C12 is connected to the negative electrode of the lead-free piezoelectric ceramic atomizer, the other end of the filter capacitor C13 is electrically connected to one end of the inductor L2, the other end of the inductor L2 is electrically connected to the power supply through the three-pin inductor L1, the other end of the inductor L2 is also electrically connected to one end of the capacitor C4, and the other end of the capacitor C4 is grounded.

[0006] The host is provided with a respiratory sensor and a display screen. The respiratory sensor is installed at an opening at the rear of the host. The respiratory sensor collects respiratory signals. The control unit processes the signals and displays real-time data through a display screen located on the outer wall of the host. A mask breathing hole is opened on the front side of the atomizing mask, and the mask breathing hole faces the respiratory sensor. The signal output end of the respiratory sensor is electrically connected to the signal acquisition end HX-SENSOR of the control unit.

[0007] Preferably, a medicine cup cover is provided on the top of the medicine cup and is opened through the medicine cup cover to put the medicine liquid into it; a capacity scale is provided on one side of the medicine cup to display the capacity of the medicine liquid on the capacity scale; the temperature sensor and the heating diaphragm are both built into the inner wall of the nozzle of the medicine cup; a lead-free piezoelectric ceramic atomizer is installed in the medicine cup, and a waterproof sealing ring is installed on the outer ring of the lead-free piezoelectric ceramic atomizer; the temperature sensor, the heating diaphragm and the lead-free piezoelectric ceramic atomizer are all connected to the host through a POGOPIN spring pin; the positive and negative poles of the lead-free piezoelectric ceramic atomizer are electrically connected to the P+ and P- of the host; the temperature sensor is electrically connected to the enable output terminal WD-SENSOR of the control unit through the POGOPIN spring pin; the heating diaphragm is electrically connected to the enable output terminal DRM-EN of the control unit through the POGOPIN spring pin.

[0008] Preferably, the atomizing mask and the adjustable elastic strap are both made of soft silicone skin-friendly material, the mask nozzle hole of the atomizing mask is connected to the nozzle of the medicine cup, and the mask strap hole of the atomizing mask is connected to the adjustable elastic strap; the adjustable elastic strap is provided with a strap adjustment buckle to adjust the length, and the strap fixing hole of the adjustable elastic strap is connected to the mask strap hole of the atomizing mask.

[0009] A method for monitoring infants using lead-free piezoelectric ceramic atomization, using the lead-free piezoelectric ceramic atomization monitoring device, includes a step of driving a lead-free piezoelectric ceramic atomization sheet, wherein the step of driving the lead-free piezoelectric ceramic atomization sheet includes a frequency tracking sub-step, wherein the frequency tracking sub-step includes: A PWM signal is outputted through the control unit of the infant lead-free piezoelectric ceramic atomization monitoring device, and the NPN MOS tube Q1 is driven by the PWM signal; an upper limit frequency and a lower limit frequency are preset by the control unit; the current of the lead-free piezoelectric ceramic atomization piece when working at different frequencies is collected through an analog-to-digital converter; the current values ​​collected at each frequency are summarized, and the average value of the current at each frequency is calculated; and the optimal resonant frequency of the lead-free piezoelectric ceramic atomization piece is confirmed by comparing the average values ​​of the current at different frequencies.

[0010] Preferably, the lead-free piezoelectric ceramic atomizer driving step further includes an impedance matching sub-step, and the impedance matching sub-step includes: The inductance value of the inductor L2 and the capacitance value of the capacitor C4 in the lead-free piezoelectric ceramic atomizer driving module are adjusted so that the circuit corresponding to the lead-free piezoelectric ceramic atomizer driving module presents pure resistance at the resonant frequency of the lead-free piezoelectric ceramic atomizer.

[0011] Preferably, the lead-free piezoelectric ceramic atomizer driving step further includes a filter circuit sub-step, and the filter circuit sub-step includes: The filter capacitor C12 and filter capacitor C13 in the lead-free piezoelectric ceramic atomizer drive module, the filter capacitor C12 is connected in parallel with the lead-free piezoelectric ceramic atomizer, and when the current of the lead-free piezoelectric ceramic atomizer changes rapidly, additional energy is provided by the filter capacitor C12 to maintain voltage stability, thereby filtering out higher-frequency ripples; the filter capacitor C13 is connected in series with the lead-free piezoelectric ceramic atomizer, when the voltage rises, the filter capacitor C13 is charged, and when the voltage drops, the filter capacitor C13 is discharged, and the output voltage is smoothed through the charging and discharging process.

[0012] Preferably, the method further includes a respiratory monitoring step, wherein the respiratory monitoring step includes an algorithm depth filtering sub-step, and the algorithm depth filtering sub-step includes: Preprocessing sub-step: subtract the average value of the signal from the original respiratory signal to eliminate the DC component in the signal; Use a bandpass filter to remove irrelevant frequency components from the signal and retain the frequency range containing useful information Internal signal; is the center frequency, is the quality factor, is a complex frequency domain variable; Time domain filtering sub-step: smooth the signal by calculating the sliding average of the signal through the moving average filter to obtain the output signal ; is the preprocessed respiratory signal at the i-th time point before the current time point, is the order of the filter; The signal is smoothed by calculating the sliding average of the signal through the weighted moving average filter to obtain the output signal ,in is the weight coefficient; Frequency domain filtering sub-step: Convert the time domain signal into the frequency domain signal through fast Fourier transform ,in is the rotation factor; Apply filters in the frequency domain to remove unwanted frequency components and retain the frequency domain signal after frequency domain filtering ,in is the transfer function of the frequency domain filter; Finally, the frequency domain signal is converted into a time domain signal , is the frequency domain signal, is the rotation factor; Adaptive filtering sub-step: Use the least mean square algorithm to obtain the filter weight coefficient by minimizing the mean square value of the error signal , is the learning rate, is the error signal, is the conjugate of the input signal; Wavelet transform sub-step: Get the signal in the time-frequency domain through wavelet transform Wavelet coefficients at different scales a and different positions b ,in is the wavelet function, a is the scale parameter, b is the location parameter, is the input time domain signal, is the complex conjugate of the wavelet function; Signal feature extraction sub-step: identifying the peak of the signal , to identify the beginning and end of the respiratory cycle, obtain the exhalation phase and the inspiration phase, and record the number of peaks, where and are the first-order differences of the signals; Count the number of zero crossings of a signal ; Signal analysis sub-step: obtain the respiratory frequency through the number of signal peaks per unit time, or obtain the respiratory frequency through the number of zero crossings per unit time.

[0013] Preferably, the respiratory monitoring step further includes a respiratory adjustment sub-step, and the respiratory adjustment sub-step includes: The respiratory sensor monitors and obtains the infant's respiratory rate data in real time; the control unit receives the respiratory rate data and processes it through the respiratory monitoring step, and then compares the respiratory rate data with preset parameters; when the respiratory rate is lower than the preset lower threshold, it is judged as bradypnea; when the respiratory rate is higher than the preset upper threshold, it is judged as tachypnea; when the respiratory rate is between the preset lower and upper thresholds, it is judged as normal breathing; When breathing is normal, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to enable the lead-free piezoelectric ceramic atomizer to work normally; the display screen displays the current breathing rate value in real time and shows the normal breathing status; the lead-free piezoelectric ceramic atomizer is adjusted according to the exhalation stage and the inhalation stage; when bradypnea is too slow, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to suspend the work of the lead-free piezoelectric ceramic atomizer; the display screen displays a bradypnea alarm message; when breathing is too fast, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to suspend the work of the lead-free piezoelectric ceramic atomizer; the display screen displays a shortness of breath alarm message.

[0014] Preferably, the method further includes a liquid medicine spraying temperature control step, wherein the liquid medicine spraying temperature control step includes: The temperature of the spray liquid is monitored in real time by a temperature sensor, and the collected temperature data is transmitted to the control unit; the control unit adjusts the output power of the heating diaphragm according to the received temperature data to stabilize the temperature within the set range.

[0015] Preferably, the method further includes a data display and diagnosis step, wherein the data display and diagnosis step includes: The key data of the baby's atomization process is displayed in real time on the display screen; the key data is dynamically displayed on the display screen in the form of charts or numbers; the key data is synchronously saved in the storage area of ​​the control unit; the key data is used by guardians or medical staff for subsequent analysis and diagnosis.

[0016] The beneficial effects of the present invention are as follows: the lead-free piezoelectric ceramic atomization monitoring device and monitoring method thereof use a lead-free piezoelectric ceramic atomizer as a core component, fundamentally eliminating the potential threat of heavy metal ions to infant health and ensuring the safety of atomization treatment. Through the lead-free piezoelectric ceramic atomizer driving technology, the impedance matching step is used to ensure that the circuit is coordinated with the impedance characteristics of the lead-free piezoelectric ceramic atomizer; the filtering circuit step is used to improve the stability and efficiency of the lead-free piezoelectric ceramic atomizer; and the tracking frequency step is used to ensure that the driving signal matches the natural frequency of the lead-free piezoelectric ceramic atomizer. Through the respiratory monitoring technology, the algorithm deep filtering step is used to ensure the quality and integrity of the signal; and the respiratory adjustment step is used to provide infants with a safer and more personalized atomization treatment experience. Through the liquid medicine spray temperature control technology, irritation to the infant's nasal cavity caused by inappropriate liquid medicine spray temperature is effectively avoided. Through data display and diagnostic technology, valuable diagnostic information can be provided to doctors, which is conducive to the precise treatment of diseases. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a monitoring device and a monitoring method thereof in one embodiment of the present invention Figure 2This is a driving circuit diagram of a lead-free piezoelectric ceramic atomizer in one embodiment of the present invention; Figure 3 is a circuit diagram of a control unit in one embodiment of the present invention; Figure 4 is a circuit diagram of a respiratory collection unit in one embodiment of the present invention; Figure 5 A control circuit diagram of a temperature sensor and a heating diaphragm in one embodiment of the present invention; Figure 6 A control circuit diagram of a display screen in one embodiment of the present invention; Figure 7 is a circuit diagram of a boost / charging unit in one embodiment of the present invention; Figure 8 This is a circuit diagram of a Type-C charging unit in one embodiment of the present invention; Figure 9 is a circuit diagram of a battery unit in one embodiment of the present invention; Figure 10 is a circuit diagram of an LDO power supply unit in one embodiment of the present invention; Figure 11 is a circuit diagram of a power switch unit in one embodiment of the present invention; Figure 12 is a circuit diagram of a power detection unit in one embodiment of the present invention; Figure 13 Schematic diagram of a lead-free piezoelectric ceramic atomizer driving technology in one embodiment of the present invention; Figure 14 A flowchart of the respiratory monitoring step in one embodiment of the present invention; Figure 15 A system block diagram of a temperature sensor and a heating diaphragm corresponding to an embodiment of the present invention; Figure 16 is a schematic diagram of a display mode of a display screen in one embodiment of the present invention; Figure 17 An exploded view of an atomizing mask, a main unit, and a medicine cup according to an embodiment of the present invention; Figure 18 An exploded view of a lead-free piezoelectric ceramic atomization monitoring device for infants according to one embodiment of the present invention; Figure 19 This is a schematic structural diagram of a lead-free piezoelectric ceramic atomization monitoring device for infants according to an embodiment of the present invention; Figure 20 An exploded view of a lead-free piezoelectric ceramic atomization monitoring device for infants according to one embodiment of the present invention; Figure 21 This is a schematic structural diagram of a medicine cup and a host in one embodiment of the present invention; Figure 22 This is a schematic structural diagram of an atomizing mask according to an embodiment of the present invention; In the figure: 1 atomizing mask; 11 mask nozzle hole; 12 mask breathing hole; 13 mask strap hole; 2 medicine cup; 21 nozzle; 22 medicine cup cover; 221 medicine cup sealing ring; 23 capacity scale; 24 buckle; 3 heating diaphragm; 4 host; 41 breathing sensor; 42 spring pin; 5 adjustable elastic strap; 51 strap adjustment buckle; 52 strap body; 521 strap fixing hole; 6 button; 7 temperature sensor; 8 display; 9 lead-free piezoelectric ceramic atomizing piece; 91 waterproof sealing ring. DETAILED DESCRIPTION

[0018] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0019] like Figure 1-22 As shown, a lead-free piezoelectric ceramic atomization monitoring device for infants includes a host 4, a medicine cup 2, an atomization mask 1 and an adjustable elastic strap 5. The host 4 is detachably installed under the medicine cup 2, and the host 4 is connected to the medicine cup 2 via a buckle 24. The host 4 and the medicine cup 2 are both connected to the front side of the atomization mask 1, and the adjustable elastic strap 5 is connected to the atomization mask 1; in this embodiment, the host 4 is connected to the medicine cup 2 via the buckle 24, making the assembly and disassembly and cleaning of the device more convenient and quick; the medicine cup 2 is connected to the front side of the atomization mask 1, and this design can ensure that the atomized medicine liquid directly acts on the infant's respiratory tract, thereby improving the treatment effect; the adjustable elastic strap 5 is connected to the atomization mask 1, and the user can adjust the tightness of the elastic strap 5 according to the infant's head shape and comfort, ensuring that the atomization mask 1 fits tightly to the face, preventing leakage of the atomized medicine spray, and improving the user's comfort.

[0020] The host 4 is provided with a driver, which is installed inside the host 4 and includes a control unit and a lead-free piezoelectric ceramic atomizer drive module; the lead-free piezoelectric ceramic atomizer drive module includes an NPN MOS tube Q1, a current limiting resistor R1, a current sampling resistor R4, an inductor L2, a capacitor C4, a filter capacitor C12 and a filter capacitor C13; the control unit is an MCU; like Figure 2 and 3As shown, the PWM output end of the control unit is electrically connected to the G pole of the NPN MOS transistor Q1 through the current limiting resistor R1, the D pole of the NPN MOS transistor Q1 is electrically connected to the negative pole of the lead-free piezoelectric ceramic atomizing plate 9, and the S pole of the NPN MOS transistor Q1 is grounded through the current sampling resistor R4; the S pole of the NPN MOS transistor Q1 is also electrically connected to the current acquisition end ADC of the control unit to collect the working current of the lead-free piezoelectric ceramic atomizing plate 9 under PWM signals of different frequencies; the high level portion of the PWM signal can drive the NPN MOS transistor Q1 to turn on, and the low level portion of the PWM signal can drive the NPN MOS transistor Q1 to turn off. When the NPN MOS transistor Q1 is turned on, the negative pole of the lead-free piezoelectric ceramic atomizing plate 9 can be grounded to form a loop. When the NPN MOS transistor Q1 is turned off, the negative pole of the lead-free piezoelectric ceramic atomizing plate 9 can be disconnected from the ground and the loop is disconnected, thereby causing the lead-free piezoelectric ceramic atomizing plate 9 to oscillate; like Figure 2 As shown, one end of the inductor L2 is electrically connected to the filter capacitor C13, and the other end of the inductor L2 is electrically connected to the power supply through the three-pin inductor L1. The other end of the inductor L2 is also electrically connected to one end of the capacitor C4, and the other end of the capacitor C4 is grounded; by setting the inductor L2 and the capacitor C4, a matching network is formed; the design purpose of this network is to adjust the impedance of the circuit so that it matches the impedance of the lead-free piezoelectric ceramic atomizer 9 at the resonant frequency. The lead-free piezoelectric ceramic atomizer 9 has its inherent resonant frequency, which is determined by its mechanical structure and electrical parameters; when the inductance and capacitance values ​​in the circuit are precisely adjusted so that the entire circuit is purely resistive at the resonant frequency of the lead-free piezoelectric ceramic atomizer 9, impedance matching is achieved. After impedance matching, the power supply can more efficiently transmit electrical energy to the lead-free piezoelectric ceramic atomizer 9, reducing reflections and losses during the transmission process. This means that more electrical energy is converted into mechanical vibration energy, which in turn drives the atomization process. Since impedance matching improves energy conversion efficiency, the heat generated by the lead-free piezoelectric ceramic atomizer 9 during operation will also be reduced accordingly. This helps to extend the service life of the lead-free piezoelectric ceramic atomizer 9 and improve its stability. like Figure 2As shown, the positive electrode of the lead-free piezoelectric ceramic atomizer 9 is connected to one end of the filter capacitor C13 and the filter capacitor C12 respectively, the other end of the filter capacitor C12 is connected to the negative electrode of the lead-free piezoelectric ceramic atomizer 9, and the other end of the filter capacitor C13 is electrically connected to one end of the inductor L2; the design purpose of this network is to reduce the clutter interference in the circuit and improve the stability and efficiency of the atomizer; the filter capacitor C13 is connected in series with the lead-free piezoelectric ceramic atomizer 9. When the voltage rises, the filter capacitor C13 is charged; when the voltage drops, the filter capacitor C13 is discharged. This charging and discharging process helps to smooth the output voltage. The filter capacitor C12 is connected in parallel with the lead-free piezoelectric ceramic atomizer 9. Its function is to provide additional energy when the current of the lead-free piezoelectric ceramic atomizer 9 changes rapidly to maintain voltage stability. The filter capacitor C12 helps to filter out higher frequency ripple.

[0021] The lead-free piezoelectric ceramic atomization monitoring device uses a lead-free piezoelectric ceramic atomization plate 9 as its core component, fundamentally eliminating the potential threat of heavy metal ions to infant health, ensuring the safety of atomization treatment, and resolving the safety issues and poor treatment effects of traditional atomization equipment.

[0022] It is worth noting that if Figure 17-22 As shown, a medicine cup cover 22 is provided on the top of the medicine cup 2 and is opened through the medicine cup cover 22 to put in the medicine liquid. A capacity scale 23 is provided on one side of the medicine cup 2 to display the volume of the medicine liquid at the capacity scale 23. The temperature sensor 7 and the heating diaphragm 3 are both built into the inner wall of the nozzle 21 of the medicine cup 2. A lead-free piezoelectric ceramic atomizer 9 is installed in the medicine cup 2, and a waterproof sealing ring 91 is installed on the outer ring of the lead-free piezoelectric ceramic atomizer 9; the temperature sensor 7, the heating diaphragm 3 and the lead-free piezoelectric ceramic atomizer 9 are all connected to the host 4 through the POGOPIN spring pin 42; as shown Figure 2 As shown, the positive and negative electrodes of the lead-free piezoelectric ceramic atomizer 9 are electrically connected to the P+ and P- terminals of the host 4; Figure 5As shown, the enable input terminal of the heating diaphragm 3 is electrically connected to the enable output terminal DRM-EN of the control unit. The signal output terminal of the temperature sensor 7 is electrically connected to the signal acquisition terminal WD-SENSOR of the control unit. The heating diaphragm 3 is used to heat the spray of the drug solution. The high-precision temperature sensor 7 monitors the spray temperature of the drug solution in real time and transmits the collected temperature data to the control unit. The control unit analyzes the received temperature data and precisely controls the output power of the heating diaphragm 3. The adjusted spray temperature of the drug solution is collected in real time by the temperature sensor 7, forming a closed-loop control. The system ensures that the spray temperature of the drug solution remains stable within the set range through continuous feedback adjustment. Because infants and young children are particularly sensitive to changes in the spray temperature of the drug solution, overcooling or overheating the spray solution can cause nasal discomfort and even aggravate respiratory symptoms. Therefore, precise control of the spray temperature of the drug solution is crucial to improving the comfort and effectiveness of nebulization therapy. The system provides a user interface that allows the operator to set the temperature setpoint and view real-time temperature data.

[0023] Preferably, Figure 17-22 As shown, a button 6 is provided on the right side of the host 4 for turning on the device, a breathing sensor 41 is provided at the rear opening of the host 4 to collect signals, and the host 4 is provided with a control unit to process the signals and display real-time data through a display screen 8 located on the outer wall of the host 4; a mask breathing hole 12 is provided on the front side of the atomizing mask 1, and the mask breathing hole 12 faces the breathing sensor 41. Such a design can monitor the user's breathing condition in real time to ensure the safety and effectiveness of atomization treatment. The breathing sensor 41 can adjust the atomization rate according to the infant's breathing frequency to meet the treatment needs of different infants; Figure 4 As shown, the signal output terminal of the breathing sensor 41 is electrically connected to the signal acquisition terminal HX-SENSOR of the control unit; The respiratory sensor 41 is also provided with a ground terminal and a power supply terminal. The ground terminal is connected to the ground, and the power supply terminal is connected to the power supply, thereby enabling the respiratory sensor 41 to operate and collect respiratory data. The high-precision respiratory sensor 41 collects the infant's respiratory signals in real time, converts these signals into electrical signals, and transmits them to the control unit. The control unit uses advanced algorithms to perform deep filtering on the signals, extract useful signal features, identify the exhalation and inhalation phases, and calculate the respiratory rate. The system monitors this data in real time. If the breathing is normal, the control unit controls the atomization drive circuit to atomize normally and displays the infant's respiratory rate and other data on the display screen 8. If abnormal breathing (such as rapid breathing, bradypnea, etc.) is detected, the protection mechanism is immediately triggered, the atomization treatment is suspended, and the alarm information is clearly displayed on the display screen 8 to ensure the safety and effectiveness of the treatment process.

[0024] The outer wall of the host 4 is provided with a display screen 8, which is an OLED display screen. Figure 6 and16 As shown, the display screen 8 is connected to the control unit via SPI communication to intuitively display key data, providing users with comprehensive information on the infant and device status. It can monitor and display key data such as respiratory rate, liquid spray temperature, atomization time, battery charge, operating mode, and usage status in real time. This data is dynamically displayed on the OLED screen in graphical or numerical form, making it easier for guardians or medical staff to quickly understand the infant's status and improving the accuracy and efficiency of data reading. In addition, the device supports data recording and playback, storing all data from the infant's atomization treatment process for subsequent analysis and research by guardians or medical staff, helping to optimize treatment plans and providing valuable data support for clinical research.

[0025] like Figure 7-12As shown, the host 4 is also provided with a power module, which includes a Type-C charging unit, a boost / charging unit, a battery unit, an LDO power supply unit, a power switch unit and a power detection unit; the Type-C charging unit includes a TYPE-C-6P interface, the boost / charging unit includes a boost converter ETA9184E10, and the output terminals VBUS1 and VBUS2 of the TYPE-C-6P interface are both electrically connected to the input terminal VIN of the boost converter ETA9184E10, and the battery unit is electrically connected to the input terminal BAT of the boost converter ETA9184E10 to realize TYPE-C power supply or battery power supply, and the boost output terminal OUT of the boost converter ETA9184E10 is electrically connected to the positive electrode of the lead-free piezoelectric ceramic atomizer 9 through the three-pin inductor L1 as the power output terminal to realize power supply for the lead-free piezoelectric ceramic atomizer 9. The model of the three-pin inductor L1 is CD0805-10UH-500UH. Its function is to convert a lower input voltage into a higher voltage through the mutual inductance characteristics of the inductor to meet the working needs of the lead-free piezoelectric ceramic atomizer 9. The LDO power supply unit includes a voltage regulator XC6206P332MR, the battery unit is electrically connected to the input terminal VIN of the voltage regulator XC6206P332MR through a power switch unit, and the output terminal VOUT of the voltage regulator XC6206P332MR is electrically connected to the power input terminal VDD of the control unit to power the control unit. The power measurement unit includes a resistor R6 and a resistor R7. The battery unit is electrically connected to one end of the resistor R6 through the power switch unit, and the other end of the resistor R6 is electrically connected to one end of the resistor R7 and the power feedback input terminal VBAT_DET of the control unit respectively. The other end of the resistor R7 is grounded to achieve power measurement. Specifically, in the power switch unit, the MOS tube Q2 is turned on or off through the control port POWER_CTRL of the control unit or the switch ZX-QC4545-3_5TP, thereby controlling the connection or disconnection of the input and output ends of the power switch unit, wherein the input end of the power switch unit is electrically connected to the battery unit, and the output end of the power switch unit is electrically connected to one end of the resistor R6 and the input end VIN of the voltage regulator XC6206P332MR, respectively.

[0026] Specifically, if Figure 18-20As shown, the atomizing mask 1 is made of soft, skin-friendly silicone. The mask nozzle hole 11 of the atomizing mask 1 is connected to the nozzle 21. The mask breathing hole 12 of the atomizing mask 1 cooperates with the breathing sensor 41 of the main unit 4 to collect the infant's breathing signal. The mask strap hole 13 of the atomizing mask 1 is connected to the adjustable elastic strap 5. The atomizing mask 1 of this embodiment is designed to be soft and conform to the contours of the infant's face, ensuring comfort and a tight seal when worn, effectively preventing leakage of the drug spray, and improving the efficiency of atomization treatment. The connection between the medicine cup 2 and the atomizing mask 1 is convenient for the user to disassemble and clean before and after use, ensuring the hygiene and safety of the device.

[0027] Optional, such as Figure 18-20 As shown, the adjustable elastic strap 5 is made of soft, skin-friendly silicone material to avoid discomfort for infants wearing it. The adjustable elastic strap 5 is provided with a strap adjustment buckle 51 for adjusting the length. The strap fixing hole 521 of the adjustable elastic strap 5 is connected to the mask strap hole 13 of the atomizing mask 1. The design of the strap adjustment buckle 51 of this embodiment allows parents or medical staff to easily adjust the length of the strap according to the size of the infant's head to adapt to different infants' head shapes, ensuring that the atomizing mask 1 can fit the infant's face tightly and comfortably. The connection method between the atomizing mask 1 and the adjustable elastic strap 5 provides a hands-free infant atomizing monitoring device, so that parents or medical staff can free their hands to perform other nursing tasks without holding the device, thereby improving nursing efficiency and convenience.

[0028] In this embodiment, the control unit is an MCU, and the button 6, the breathing sensor 41, the temperature sensor 7 and the display screen 8 are all electrically connected to the control unit.

[0029] A method for monitoring infants using lead-free piezoelectric ceramic atomization, using the lead-free piezoelectric ceramic atomization monitoring device for infants, such as Figure 13 As shown, the lead-free piezoelectric ceramic atomizing sheet 9 driving step includes the step of tracking the frequency, and the step of tracking the frequency includes: A PWM signal is outputted through the control unit of the infant lead-free piezoelectric ceramic atomization monitoring device, and the PWM signal drives the NPN MOS tube Q1; an upper limit frequency and a lower limit frequency are preset by the control unit; the current of the lead-free piezoelectric ceramic atomization piece 9 when working at different frequencies is collected through an analog-to-digital converter, the current value collected at each frequency is summarized, and the average value of the current at each frequency is calculated; by comparing the average values ​​of the current at different frequencies, the optimal resonant frequency of the lead-free piezoelectric ceramic atomization piece 9 is confirmed. The control unit of this embodiment outputs a PWM (pulse width modulation) signal, which is used to drive an NPN MOS transistor Q1. The NPN MOS transistor Q1 acts as a switch here to control the lead-free piezoelectric ceramic atomizer plate 9 to operate within a set frequency range. The control unit presets an upper and lower limit frequency range because the vibration effect and atomization efficiency of the lead-free piezoelectric ceramic atomizer plate 9 will vary when operating at different frequencies. The analog-to-digital converter (ADC) is used to collect the current of the lead-free piezoelectric ceramic atomizer plate 9 when operating at different frequencies. This current data is key information for evaluating the working state of the lead-free piezoelectric ceramic atomizer plate 9. By calculating the average working current, the working current at the frequency point obtained is more accurate. By comparing the current values ​​at different frequencies, the optimal resonant frequency of the lead-free piezoelectric ceramic atomizer plate 9 can be confirmed. At the optimal resonant frequency, the vibration of the lead-free piezoelectric ceramic atomizer plate 9 is most effective, and can produce a finer and more uniform atomization effect.

[0030] By tracking frequency technology, the lead-free piezoelectric ceramic atomizer 9 can automatically adapt to environmental changes, such as water temperature, water viscosity and other factors, and always maintain the best atomization effect.

[0031] Preferably, the step of driving the lead-free piezoelectric ceramic atomizing sheet 9 further includes an impedance matching sub-step, and the impedance matching sub-step includes: The inductance value of the inductor L2 and the capacitance value of the capacitor C4 in the lead-free piezoelectric ceramic atomizer plate driving module are adjusted so that the circuit corresponding to the lead-free piezoelectric ceramic atomizer plate driving module presents pure resistance at the resonant frequency of the lead-free piezoelectric ceramic atomizer plate 9, thereby achieving impedance matching. After the impedance matching in this embodiment, the power supply can more effectively transmit electrical energy to the lead-free piezoelectric ceramic atomizer plate, reducing reflection and loss during the transmission process, which means that more electrical energy is converted into mechanical vibration energy. Since the impedance matching improves the energy conversion efficiency, the heat generated by the lead-free piezoelectric ceramic atomizer plate during operation will also be reduced accordingly, which helps to extend the service life of the lead-free piezoelectric ceramic atomizer plate and improve its stability.

[0032] Preferably, the lead-free piezoelectric ceramic atomizing sheet 9 driving step further includes a filtering circuit sub-step, and the filtering circuit sub-step includes: The filter capacitor C12 is connected in parallel with the lead-free piezoelectric ceramic atomizer 9 to provide additional energy when the current of the lead-free piezoelectric ceramic atomizer 9 changes rapidly, so as to maintain voltage stability and help filter out higher frequency ripples. The filter capacitor C13 is connected in series with the lead-free piezoelectric ceramic atomizer 9. When the voltage rises, the filter capacitor C13 is charged, and when the voltage drops, the filter capacitor C13 is discharged. This charging and discharging process helps to smooth the output voltage.

[0033] Preferably, the method further includes a respiratory monitoring step, wherein the respiratory monitoring step includes an algorithm depth filtering sub-step, and the algorithm depth filtering sub-step includes: Preprocessing sub-step: Subtract the average value of the signal from the original respiratory signal. In order to eliminate the DC component (i.e. the offset of the signal), subtract the average value from the signal. This helps the filter better handle the dynamic changes of the signal and then retain the frequency range. The signal in is used as the preprocessed respiratory signal, where is the center frequency, is the quality factor, It is a complex frequency domain variable that uses a bandpass filter to remove irrelevant frequency components in the signal, retaining only the signal within a specific frequency range that contains useful information, which is beneficial for removing power supply interference or irrelevant high-frequency noise.

[0034] Time domain filtering sub-step: Calculate the sliding average of the signal to smooth the signal to obtain the output signal , the output signal As a first smoothing signal, reducing random noise, where is the preprocessed respiratory signal at the i-th time point before the current time point, is the order of the filter; specifically, in the implementation of the moving average filter, for each time point n, a window containing the current point and several previous points will be considered, and the values ​​of all points in this window will be calculated to obtain the filtering result at that time point; the time domain filtering sub-step also includes: calculating the weighted moving average of the signal to smooth the signal to obtain the output signal , the output signal As the second smoothing signal, is the weight coefficient, which is usually designed to decay exponentially over time. is the respiratory signal after the first smoothing of the signal at the i-th time point before the current time point. Unlike ordinary moving average, weighted moving average gives different weights to the signal values ​​at different time points, usually giving more weight to the most recent samples.

[0035] Frequency domain filtering sub-step: the time domain signal output by the time domain filtering Perform fast Fourier transform to obtain frequency domain signal ,in is the rotation factor, which maps the time domain signal to the frequency domain; in this expression, j represents the imaginary unit, which allows us to consider the phase information of the signal when calculating the spectrum of the time domain signal; this complex representation can capture the amplitude and phase of the signal at the same time, which is the key to analyzing periodic and oscillatory behavior; the frequency domain filtering also includes: obtaining the frequency domain signal after frequency domain filtering ,in is the transfer function of the frequency domain filter; Finally, the frequency domain signal is converted into a time domain signal , is the frequency domain signal, is the rotation factor; Adaptive filtering sub-steps: , is the learning rate, is the error signal, is the conjugate of the input signal. This formula is the least mean square (LMS) algorithm, which is an adaptive filtering algorithm used to find the filter coefficients by minimizing the mean square value of the error signal without knowing the desired signal.

[0036] Wavelet transform sub-step: Get the signal in the time-frequency domain through wavelet transform Wavelet coefficients at different scales a and different positions b ,in is the wavelet function, a is the scale parameter, b is the location parameter, is the input time domain signal, It is the complex conjugate of the wavelet function to analyze the signal; the signal is analyzed in the time-frequency domain by wavelet transform, which provides the time-frequency representation of the signal at different scales and positions, which enables us to identify and analyze local features in the signal, such as mutations, spikes or periodic components.

[0037] Signal feature extraction sub-step: obtain the peak value of the time domain signal converted from the frequency domain signal after frequency domain filtering , to identify the beginning and end of the respiratory cycle and record the number of peaks, where and are all first-order differences of the signal; among them, the formula for converting the frequency domain signal into the time domain signal is , is the frequency domain signal, is the rotation factor. Then perform signal analysis and obtain the respiratory frequency by the number of signal peaks per unit time. Indicates that the value of the time domain signal at time n is greater than the threshold; Indicates that the first-order difference of the time domain signal at time n is greater than 0, which means that the signal is rising at time n; It means that the first-order difference of the signal at time n+1 is less than or equal to 0, which means that the signal no longer rises at time n+1, but may fall or be flat.

[0038] Preferably, the number of zero crossings of the time domain signal is obtained This means that each time the signal changes from positive to negative or vice versa (i.e., crosses zero), a count is made. In this embodiment, inhalation and exhalation can be considered as one positive signal and one negative signal. Signal analysis is then performed, and the respiratory rate is obtained by the number of zero crossings per unit time.

[0039] Signal analysis sub-step: obtain the respiratory frequency through the number of signal peaks per unit time, or obtain the respiratory frequency through the number of zero crossings per unit time.

[0040] Specifically, the respiratory monitoring step further includes a respiratory adjustment sub-step, and the respiratory adjustment sub-step includes: The breathing sensor 41 monitors and obtains the infant's breathing rate data in real time; The control unit receives the respiratory rate data and processes it through the respiratory monitoring step, and then compares the respiratory rate data with the preset parameters; When the respiratory rate is lower than the preset lower threshold (less than 30 times per minute), it is judged as bradypnea; When the respiratory rate is higher than the preset upper threshold (more than 60 times per minute), it is judged as tachypnea; When the respiratory rate is between the preset lower and upper thresholds (30-60 times per minute), it is judged as normal breathing; When breathing is normal, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to enable the lead-free piezoelectric ceramic atomizer 9 to work normally; the display screen 8 displays the current respiratory rate value in real time and shows the normal breathing state; the lead-free piezoelectric ceramic atomizer 9 adjusts according to the exhalation stage and the inhalation stage to achieve the maximum effect of atomization treatment, that is, the lead-free piezoelectric ceramic atomizer 9 stops working in the exhalation stage and works normally in the inhalation stage; When bradypnea occurs, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to suspend the operation of the lead-free piezoelectric ceramic atomizer 9; the display screen 8 displays a bradypnea alarm message; When the breathing is rapid, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to stop the lead-free piezoelectric ceramic atomizer 9 from working; and the display screen 8 displays a rapid breathing alarm message.

[0041] Preferably, Figure 15As shown, the method further includes a liquid medicine spray temperature control step, wherein the liquid medicine spray temperature control step includes: The temperature sensor 7 monitors the spray temperature of the liquid medicine in real time and transmits the collected temperature data to the control unit. Based on the received temperature data, the control unit adjusts the output power of the heating diaphragm 3 to maintain the temperature within the set range. The adjusted spray temperature of the liquid medicine is recorded in real time by the temperature sensor 7, forming a closed-loop control system. The system continuously adjusts the temperature through feedback to ensure that the spray temperature remains within the set range. The system provides a user interface that allows the operator to set the temperature setpoint and view real-time temperature data.

[0042] Preferably, the device also includes a data display and diagnosis step, which includes: displaying key data during the infant's nebulization process in real time via the display screen 8; and being able to monitor and display key data such as respiratory rate, liquid spray temperature, nebulization time, battery charge, operating mode, and usage status in real time. These data are dynamically displayed on the OLED screen in the form of charts or numbers, which not only makes it easier for guardians or medical staff to quickly understand the infant's condition, but also improves the accuracy and efficiency of data reading. In addition, the device also supports data recording and playback functions, which can store all data during the infant's nebulization treatment process for subsequent analysis and research by guardians or medical staff, helping to optimize treatment plans and provide valuable data support for clinical research.

[0043] In the lead-free piezoelectric ceramic atomization monitoring method for infants, by tracking the frequency sub-step, it can be ensured that the driving signal matches the natural frequency of the atomizer, so that the lead-free piezoelectric ceramic atomizer 9 can automatically adapt to environmental changes, such as water temperature, water viscosity and other factors, and always maintain the best atomization effect; by the impedance matching sub-step, it is ensured that the circuit is coordinated with the impedance characteristics of the lead-free piezoelectric ceramic atomizer 9; by the filtering circuit sub-step, the working stability and efficiency of the lead-free piezoelectric ceramic atomizer 9 are improved; by the breathing monitoring step, the original breathing signal is subjected to algorithmic deep filtering processing to extract useful signal characteristics. The system can detect the signs of infant breathing, identify the exhalation and inhalation stages, calculate the respiratory rate, and monitor these data in real time. If the breathing is normal, the control unit will control the atomization drive circuit to atomize normally. If abnormal breathing is detected, such as rapid or slow breathing, the protection mechanism will be triggered to suspend the atomization treatment, thereby achieving feedback on the infant's respiratory rate and ensuring the effectiveness of atomization. The temperature control technology of the liquid medicine spray can effectively avoid irritation to the infant's nasal cavity caused by inappropriate liquid medicine spray temperature. The data display and diagnosis technology can provide doctors with valuable diagnostic information, which is conducive to the precise treatment of diseases.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A lead-free piezoelectric ceramic atomization monitoring device for infants, characterized by: The invention comprises a main unit (4), a medicine cup (2), an atomizing mask (1) and an adjustable elastic band (5), wherein the main unit (4) is detachably mounted below the medicine cup (2), the main unit (4) is connected to the medicine cup (2) via a buckle (24), the main unit (4) and the medicine cup (2) are both connected to the front side of the atomizing mask (1), and the adjustable elastic band (5) is connected to the atomizing mask (1); The host (4) is provided with a driver, which is installed inside the host (4), and the driver includes a control unit and a lead-free piezoelectric ceramic atomizer drive module; the lead-free piezoelectric ceramic atomizer drive module includes an NPN MOS tube Q1, a current limiting resistor R1, a current sampling resistor R4, an inductor L2, a capacitor C4, a filter capacitor C12 and a filter capacitor C13; The PWM output terminal of the control unit is electrically connected to the G pole of the NPN MOS tube Q1 through the current limiting resistor R1, the D pole of the NPN MOS tube Q1 is electrically connected to the negative pole of the lead-free piezoelectric ceramic atomizing plate (9), and the S pole of the NPN MOS tube Q1 is grounded through the current sampling resistor R4; the S pole of the NPN MOS tube Q1 is also electrically connected to the current collection terminal ADC of the control unit; The positive electrode of the lead-free piezoelectric ceramic atomizing sheet (9) is connected to one end of the filter capacitor C13 and the filter capacitor C12 respectively, the other end of the filter capacitor C12 is connected to the negative electrode of the lead-free piezoelectric ceramic atomizing sheet (9), the other end of the filter capacitor C13 is electrically connected to one end of the inductor L2, the other end of the inductor L2 is electrically connected to the power supply through the three-pin inductor L1, the other end of the inductor L2 is also electrically connected to one end of the capacitor C4, and the other end of the capacitor C4 is grounded; The host (4) is further provided with a respiratory sensor (41) and a display screen (8). The respiratory sensor (41) is installed at an opening at the rear of the host (4) to collect respiratory signals. The control unit processes the signals and displays real-time data via a display screen (8) located on the outer wall of the host (4). A mask breathing hole (12) is provided on the front side of the atomizing mask (1), and the mask breathing hole (12) faces the respiratory sensor (41). The signal output end of the respiratory sensor (41) is electrically connected to the signal collection end HX-SENSOR of the control unit.

2. The lead-free piezoelectric ceramic atomization monitoring device for infants according to claim 1, characterized in that: A medicine cup cover (22) is provided on the top of the medicine cup (2), and is opened through the medicine cup cover (22) to put in the medicine liquid; a capacity scale (23) is provided on one side of the medicine cup (2) to display the volume of the medicine liquid at the capacity scale (23); the temperature sensor (7) and the heating diaphragm (3) are both built into the inner wall of the nozzle (21) of the medicine cup (2); a lead-free piezoelectric ceramic atomizer (9) is installed in the medicine cup (2), and a waterproof sealing ring (91) is installed on the outer ring of the lead-free piezoelectric ceramic atomizer (9); The temperature sensor (7), the heating diaphragm (3) and the lead-free piezoelectric ceramic atomizer (9) are all connected to the host (4) through the POGOPIN spring pin (42); the positive and negative electrodes of the lead-free piezoelectric ceramic atomizer (9) are electrically connected to the P+ and P- terminals of the host (4); the signal output terminal of the temperature sensor (7) is electrically connected to the signal acquisition terminal WD-SENSOR of the control unit; and the enable input terminal of the heating diaphragm (3) is electrically connected to the enable output terminal DRM-EN of the control unit.

3. The lead-free piezoelectric ceramic atomization monitoring device for infants according to claim 1, characterized in that: The atomizing mask (1) and the adjustable elastic band (5) are both made of soft silicone skin-friendly material. The mask nozzle hole (11) of the atomizing mask (1) is connected to the nozzle (21) of the medicine cup (2), and the mask band hole (13) of the atomizing mask (1) is connected to the adjustable elastic band (5); the adjustable elastic band (5) is provided with a band adjustment buckle (51) for adjusting the length, and the band fixing hole (521) of the adjustable elastic band (5) is connected to the mask band hole (13) of the atomizing mask (1).

4. A method for monitoring infants using lead-free piezoelectric ceramic atomization, using the lead-free piezoelectric ceramic atomization monitoring device for infants according to claim 1, characterized in that: The method includes a lead-free piezoelectric ceramic atomizing sheet driving step, wherein the lead-free piezoelectric ceramic atomizing sheet driving step includes a frequency tracking sub-step, and the frequency tracking sub-step includes: The control unit of the infant lead-free piezoelectric ceramic atomization monitoring device outputs a PWM signal, and the PWM signal drives the NPN MOS tube Q1; An upper limit frequency and a lower limit frequency are preset by the control unit; The current of the lead-free piezoelectric ceramic atomizer (9) when operating at different frequencies is collected through an analog-to-digital converter; Summarize the current values ​​collected at each frequency and calculate the average value of the current at each frequency; By comparing the average values ​​of the current at different frequencies, the optimal resonance frequency of the lead-free piezoelectric ceramic atomizer (9) is confirmed.

5. The lead-free piezoelectric ceramic atomization monitoring method for infants according to claim 4, characterized in that: The lead-free piezoelectric ceramic atomizer driving step further includes an impedance matching sub-step, and the impedance matching sub-step includes: The inductance value of the inductor L2 and the capacitance value of the capacitor C4 in the lead-free piezoelectric ceramic atomizer plate driving module are adjusted so that the circuit corresponding to the lead-free piezoelectric ceramic atomizer plate driving module presents pure resistance at the resonant frequency of the lead-free piezoelectric ceramic atomizer plate (9).

6. The lead-free piezoelectric ceramic atomization monitoring method for infants according to claim 5, characterized in that: The lead-free piezoelectric ceramic atomizer driving step further includes a filter circuit sub-step, and the filter circuit sub-step includes: In the filter capacitor C12 and the filter capacitor C13 of the lead-free piezoelectric ceramic atomizer plate driving module, the filter capacitor C12 is connected in parallel with the lead-free piezoelectric ceramic atomizer plate (9). When the current of the lead-free piezoelectric ceramic atomizer plate (9) changes rapidly, additional energy is provided through the filter capacitor C12 to maintain voltage stability, thereby filtering out higher frequency ripples; the filter capacitor C13 is connected in series with the lead-free piezoelectric ceramic atomizer plate (9). When the voltage rises, the filter capacitor C13 is charged, and when the voltage drops, the filter capacitor C13 is discharged. The output voltage is smoothed through the charging and discharging process.

7. The lead-free piezoelectric ceramic atomization monitoring method for infants according to claim 6, characterized in that: The method further includes a respiratory monitoring step, wherein the respiratory monitoring step includes an algorithm depth filtering sub-step, and the algorithm depth filtering sub-step includes: Preprocessing sub-step: subtract the average value of the signal from the original respiratory signal to eliminate the DC component in the signal; Use a bandpass filter to remove irrelevant frequency components from the signal and retain the frequency range containing useful information Internal signal; is the center frequency, is the quality factor, is a complex frequency domain variable; Time domain filtering sub-step: smooth the signal by calculating the sliding average of the signal through the moving average filter to obtain the output signal ; is the preprocessed respiratory signal at the i-th time point before the current time point, is the order of the filter; The signal is smoothed by calculating the sliding average of the signal through the weighted moving average filter to obtain the output signal ,in is the weight coefficient; Frequency domain filtering sub-step: Convert the time domain signal into the frequency domain signal through fast Fourier transform ,in is the rotation factor; Apply filters in the frequency domain to remove unwanted frequency components and retain the frequency domain signal after frequency domain filtering ,in is the transfer function of the frequency domain filter; Finally, the frequency domain signal is converted into a time domain signal , is the frequency domain signal, is the rotation factor; Adaptive filtering sub-step: Use the least mean square algorithm to obtain the filter weight coefficient by minimizing the mean square value of the error signal , is the learning rate, is the error signal, is the conjugate of the input signal; Wavelet transform sub-step: Get the signal in the time-frequency domain through wavelet transform Wavelet coefficients at different scales a and different positions b ,in is the wavelet function, a is the scale parameter, b is the location parameter, is the input time domain signal, is the complex conjugate of the wavelet function; Signal feature extraction sub-step: identifying the peak of the signal , to identify the beginning and end of the respiratory cycle, obtain the exhalation phase and the inspiration phase, and record the number of peaks, where and are the first-order differences of the signals; Count the number of zero crossings of a signal ; Signal analysis sub-step: obtain the respiratory frequency through the number of signal peaks per unit time, or obtain the respiratory frequency through the number of zero crossings per unit time.

8. The lead-free piezoelectric ceramic atomization monitoring method for infants according to claim 7, characterized in that: The respiratory monitoring step further includes a respiratory adjustment sub-step, wherein the respiratory adjustment sub-step includes: The respiratory sensor (41) monitors and obtains the infant's respiratory rate data in real time; The control unit receives the respiratory rate data and processes it through the respiratory monitoring step, and then compares the respiratory rate data with the preset parameters; When the respiratory rate is lower than the preset lower threshold, it is judged as bradypnea; When the respiratory rate is higher than the preset upper threshold, it is judged as tachypnea; When the respiratory rate is between the preset lower and upper thresholds, it is judged as normal breathing; When breathing is normal, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to enable the lead-free piezoelectric ceramic atomizer (9) to work normally; the display screen (8) displays the current breathing frequency value in real time and shows the normal breathing state; the lead-free piezoelectric ceramic atomizer (9) is adjusted according to the exhalation stage and the inhalation stage; When bradypnea occurs, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to suspend the operation of the lead-free piezoelectric ceramic atomizer (9); and a bradypnea alarm message is displayed on the display screen (8); When the breathing is rapid, the control unit sends a signal to the lead-free piezoelectric ceramic atomizer drive module to suspend the operation of the lead-free piezoelectric ceramic atomizer (9); and the display screen (8) displays a rapid breathing alarm message.

9. The lead-free piezoelectric ceramic atomization monitoring method for infants according to claim 8, characterized in that: The step of controlling the temperature of the liquid medicine spray is further included, and the step of controlling the temperature of the liquid medicine spray comprises: The temperature of the liquid spray is monitored in real time by a temperature sensor (7), and the collected temperature data is transmitted to a control unit; the control unit adjusts the output power of the heating diaphragm (3) according to the received temperature data, so that the temperature is stabilized within a set range.

10. The lead-free piezoelectric ceramic atomization monitoring method for infants according to claim 9, characterized in that: The method also includes a data display and diagnosis step, wherein the data display and diagnosis step includes: Display key data of the baby's atomization process in real time via a display screen (8); Key data are dynamically displayed on the display screen (8) in the form of graphs or numbers; Key data are stored synchronously in the storage area of ​​the control unit; Key data is used by guardians or medical staff for subsequent analysis and diagnosis.

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