Apparatus and method for generating a vibrating gas stream

Abstract

The application relates to a device and a method for generating a vibrating airflow, comprising a valve body integrated base, a pressure reducing valve, a proportional valve, a first pressure sensor, a second pressure sensor and a main control board; the pressure reducing valve and the proportional valve are integrally installed on the valve body integrated base; the main control board is electrically connected with the electrical connection lines of the first pressure sensor, the second pressure sensor and the proportional valve; the main control board is internally provided with an analog-digital conversion channel, a digital-analog output channel, a timing module, a PID operation module and an alarm module; only a single proportional valve is adopted to simultaneously complete linear regulation of static pressure and periodic pulse oscillation gas production, and multiple electromagnetic valves are not needed to be combined; the timing module adopts a 400Hz-1kHz high-frequency interrupt as a time reference, the valve opening and closing time sequence is finely controlled, the oscillation frequency can be continuously and steplessly regulated in a wide interval of 0-300bpm, high-frequency clock eliminates oscillation period jitter, the interval between each valve opening and closing is uniform, the pulse airflow pressure difference is stable, airflow impact of fast and slow alternation does not occur, and the comfort of patients is improved.

Description

Technical Field

[0001] This invention relates to a structure for generating vibrating airflow, and more particularly to an apparatus and method for generating vibrating airflow. Background Technology

[0002] In complications arising from respiratory diseases or other illnesses, impaired airway ciliary function is highly likely, leading to thickened sputum that is difficult to cough up. This impaired ciliary function can also interfere with the cough reflex. Furthermore, the accumulation and retention of respiratory secretions provides opportunities for bacterial colonization in the airways and respiratory infections, resulting in infection, inflammatory responses, and damage to the airways and lung tissue. Therefore, prompt clearance of airway secretions is crucial for reducing the incidence of complications such as pneumonia. Most existing technologies achieve sputum expectoration and improve respiratory function by continuously delivering high-frequency oscillating gas.

[0003] Existing gas vibration devices generally utilize the reciprocating motion of piston pumps or other mechanical devices to drive gas oscillation. This design, through the coordination of mechanical mechanisms and electronic circuitry, and under the control of solenoid valves, achieves changes in the cross-sectional area of ​​the gas flow during its movement, ultimately resulting in changes in the gas flow pressure and velocity, thereby generating oscillating gas. Existing devices for generating pulse / vibrating airflow often employ piston-type oscillation mechanisms and alternating on / off multiple solenoid valves to achieve airflow fluctuations, which has the following drawbacks: Piston mechanical structures are large in size, wear out quickly, and have high maintenance costs. They also have a narrow oscillation frequency adjustment range and poor pressure linear control accuracy. Multi-channel solenoid valve combination schemes have complex control logic, large synchronization errors among multiple valves, and unstable airflow pulse pressure difference, making it impossible to achieve continuous stepless pressure regulation. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes an apparatus and method for generating vibrating airflow.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a device for generating vibrating airflow, including a valve body integrated base, a pressure reducing valve, a proportional valve, a first pressure sensor, a second pressure sensor, and a main control board; The pressure reducing valve and the proportional valve are integrated and installed on the valve body integrated base; the pressure reducing valve is provided with a pressure reducing valve inlet, a pressure adjusting knob, and a pressure reducing valve outlet. The pressure reducing valve inlet is used to connect to a high-pressure air source, the pressure adjusting knob is used to manually adjust the output pressure of the pressure reducing valve, and the pressure reducing valve outlet outputs a constant pressure airflow. The proportional valve is provided with a proportional valve inlet, an electrical connection line, and a proportional valve outlet; the proportional valve inlet is connected to the outlet of the pressure reducing valve; the electrical connection line is electrically connected to the main control board and receives the control current and on / off signal output by the main control board; the proportional valve outlet serves as the main outlet of the device to output vibrating airflow. The valve body integrated base has a first sensor interface and a second sensor interface; The first sensor interface connects the air path between the outlet of the pressure reducing valve and the inlet of the proportional valve. The first pressure sensor is installed on the first sensor interface to collect the air source pressure on the input side of the proportional valve. The second sensor interface connects the air path on the outlet side of the proportional valve. The second pressure sensor is installed on the second sensor interface to collect the airflow pressure output by the device. The main control board is electrically connected to the electrical connection lines of the first pressure sensor, the second pressure sensor, and the proportional valve, respectively; the main control board has built-in analog-to-digital conversion channel, digital-to-analog output channel, timing module, PID calculation module, and alarm module; The main control board outputs different currents through the digital-analog output channel to adjust the valve opening of the proportional valve to control the output airflow pressure / flow rate; the main control board periodically controls the power supply to the proportional valve through the timing module, and generates pulsed vibrating airflow by relying on the pressure difference generated by the opening and closing of the proportional valve.

[0006] In a preferred embodiment of the present invention, after the pressure reducing valve is adjusted by the pressure regulating knob, the pressure reducing valve outlet outputs a constant airflow of 150 kPa at its rated stable pressure.

[0007] In a preferred embodiment of the present invention, the timing module generates a stable timing interrupt signal of 400 Hz to 1 kHz; a complete opening and closing cycle of the proportional valve is defined as 1 bpm, and the oscillation frequency adjustment range of the device is 0 to 300 bpm.

[0008] In a preferred embodiment of the present invention, the proportional valve outputs pressure in the range of 0-100 cmH2O.

[0009] In a preferred embodiment of the present invention, the PID calculation module receives the deviation value between the measured pressure of the second pressure sensor and the preset target pressure, calculates and outputs a compensation control current, and corrects the nonlinear output of the proportional valve by combining the flow-current characteristic curve of the proportional valve, while limiting the maximum output current to prevent the proportional valve from saturating and running out of control.

[0010] In a preferred embodiment of the present invention, the alarm module triggers an alarm under the following conditions: the first pressure sensor detects that the gas source pressure exceeds a preset safety threshold, the pressure sensor is disconnected and has no feedback signal, and the actual output pressure of the second pressure sensor continuously deviates from the set allowable range.

[0011] In a preferred embodiment of the present invention, the main control board is provided with two A / D analog-to-digital conversion channels, which respectively acquire the analog pressure electrical signals of the first pressure sensor and the second pressure sensor, and convert the acquired signals into actual pressure physical quantities after filtering and noise reduction processing.

[0012] The present invention also discloses a method for controlling the generation of vibrating airflow, comprising the following steps: S1. Gas source pressure stabilization pretreatment: High-pressure gas source is connected to the inlet of pressure reducing valve. Rotate the pressure regulating knob to adjust the output of pressure reducing valve to a constant 150kPa airflow, which is then delivered to the inlet of proportional valve. The first pressure sensor collects the output pressure of pressure reducing valve in real time. When the pressure exceeds the safe range, the main control board triggers the alarm module to alarm. S2. Parameter initialization: The main control board inputs the target output pressure and target oscillation frequency, initializes the PID calculation module, and adjusts the parameters and the proportional valve output current limit. S3, Dual-channel real-time pressure acquisition: The first pressure sensor continuously monitors the input air source pressure of the proportional valve, and the second pressure sensor acquires the output airflow pressure of the proportional valve outlet in real time, and transmits the two pressure analog signals to the main control board. S4, PID closed-loop correction opening: The main control board calculates the deviation between the target output pressure and the actual pressure measured by the second pressure sensor, runs the PID calculation module to output compensation current to drive the proportional valve, compensates for the nonlinear characteristics of the proportional valve's flow-current, and stabilizes the output airflow pressure. S5. Pulse vibration airflow generation: The timing module inside the main control board periodically controls the power supply to the proportional valve. The proportional valve opens when powered on and closes when powered off, and outputs pulse vibration airflow based on the opening and closing pressure difference. Adjust the interruption period of the timing module to continuously adjust the oscillation frequency from 0 to 300 bpm. S6. Fault Alarm Protection: The main control board can detect gas source overpressure, sensor disconnection, and output pressure instability in real time. When any fault condition is met, the alarm module will be activated to issue a warning and the proportional valve output will be limited.

[0013] In a preferred embodiment of the present invention, the target output pressure adjustment range in step S2 is 0-100cmH2O, and the output pressure is set to 15cmH2O under normal operating conditions.

[0014] In a preferred embodiment of the present invention, the timing module in step S5 uses a stable timing interrupt signal of 400Hz-1kHz to ensure that the opening and closing cycle interval of the proportional valve is uniform and the pulse airflow pressure difference is stable.

[0015] The beneficial effects of this invention are as follows: The integrated base of the valve body houses the pressure reducing valve, proportional valve, and two pressure measurement interfaces, eliminating the need for numerous external hoses and diverter connectors, resulting in a compact and small overall design. The absence of a piston reciprocating motion mechanical structure eliminates piston wear and jamming issues, leading to low long-term wear and significantly reducing maintenance costs and repair frequency. A single proportional valve can simultaneously achieve static pressure linear regulation and periodic pulse oscillation gas generation, eliminating the need for multiple solenoid valve combinations. This eliminates airflow turbulence and pulse pressure fluctuations caused by asynchronous switching of multiple valves, ensuring strong airflow oscillation consistency, simplifying the control program, and reducing the computational load on the main control board. The timing module uses a 400Hz-1kHz high-frequency interrupt as the time reference, finely controlling the valve opening and closing sequence, with the oscillation frequency continuously and steplessly adjustable across a wide range of 0-300 bpm. The high-frequency clock eliminates oscillation period jitter, ensuring uniform valve opening and closing intervals, stable pulse airflow pressure differences, and preventing sudden airflow shocks, thus improving patient comfort. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the connection structure of the pressure reducing valve and the proportional valve of the present invention; Figure 4 This is a schematic diagram of the pressure reducing valve structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the pressure reducing valve of the present invention; Figure 6 This is a schematic diagram of the proportional valve structure of the present invention; Figure 7 This is a schematic diagram illustrating the principle of the present invention; Figure 8 This is a flow-current characteristic curve of the proportional valve of the present invention; In the diagram: Pressure reducing valve 1; Pressure reducing valve inlet 101; Pressure adjusting knob 102; Pressure reducing valve outlet 103; Proportional valve 2; Proportional valve inlet 201; Electrical connection cable 202; Proportional valve outlet 203; Valve body integrated base 3; First sensor interface 301; Second sensor interface 302; Valve body inlet 303; Valve body outlet 304; Air passage 305; First pressure sensor 4; Second pressure sensor 5; Main control board 6. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] like Figures 1 to 8 The device shown is for generating vibrating airflow, including valve body integrated base 3, pressure reducing valve 1, proportional valve 2, first pressure sensor 4, second pressure sensor 5, and main control board 6; valve body integrated base 3 is the supporting base of this device, and adopts an integrated processing structure. The integrated base integrates valve installation, air transmission and pressure acquisition functions, reduces pipe joints, reduces the risk of air leakage, and simplifies the assembly and maintenance of the whole machine. The pressure reducing valve 1 and the proportional valve 2 are integrated and fixedly installed on the valve body integrated base 3, realizing compact integration of the air circuit, saving a large number of external air pipes, and reducing the overall size of the machine; the valve body integrated base 3 in this application is provided with a valve body air inlet 303, a valve body air outlet 304 and an air passage 305. The pressure reducing valve 1 is provided with a pressure reducing valve inlet 101, a pressure adjusting knob 102, and a pressure reducing valve outlet 103; The pressure reducing valve inlet 101 is used to connect to a high-pressure gas source and is the main gas input port of the entire device. In this application, the pressure reducing valve inlet 101 is connected to the valve body inlet 303, which is connected to the high-pressure gas source. The pressure regulating knob 102 is used to manually adjust the output pressure of the pressure reducing valve. The operator can rotate the knob 102 to adjust the internal spring preload and accurately control the stable output value. The pressure reducing valve outlet 103 outputs a constant pressure airflow. As a preferred embodiment, after the pressure reducing valve 1 is adjusted by the pressure regulating knob 102, the pressure reducing valve outlet 103 outputs a rated stable pressure of 150 kPa constant airflow. The constant airflow passes through the internal air passage 305 of the valve body integrated base 3 and directly connects to the proportional valve inlet 201. The function of the pressure reducing valve 1 is to eliminate external gas source pressure fluctuations and provide a stable and uniform pressure input gas source for the downstream proportional valve 2, avoiding gas source pressure fluctuations from interfering with the vibration airflow output accuracy.

[0020] The proportional valve 2 is provided with a proportional valve inlet 201, an electrical connection line 202, and a proportional valve outlet 203. The proportional valve inlet 201 is connected to the pressure reducing valve outlet 103 through an air passage 305. The proportional valve inlet 201 receives a 150kPa regulated air source output from the pressure reducing valve outlet 103. The electrical connection line 202 is electrically connected to the main control board 6 and receives the control current and on / off signals output by the main control board 6. The proportional valve outlet 203 serves as the main outlet of the device to output vibrating airflow. More specifically, the proportional valve outlet 203 is connected to the valve body outlet 304, and the vibrating airflow is output through the valve body outlet 304. A first sensor interface 301 and a second sensor interface 302 are provided on the valve body integrated base 3. The first sensor interface 301 is connected to the upstream pressure-stabilizing air path between the pressure reducing valve outlet 103 and the proportional valve inlet 201. A first pressure sensor 4 is installed on the first sensor interface 301 to collect the air source pressure on the input side of the proportional valve. The second sensor interface 302 is connected to the air path on the proportional valve outlet 203 side. A second pressure sensor 5 is installed on the second sensor interface 302 to collect the real-time pressure of the final output vibrating airflow. The output pressure range collected by the second pressure sensor 5 in this application is 0-100 cmH2O, and the normal operating output pressure of the device is 15 cmH2O. The main control board 6 is electrically connected to the first pressure sensor 4, the second pressure sensor 5, and the proportional valve 2 via electrical connection lines 202. The main control board 6 has built-in analog-to-digital conversion channels, digital-to-analog output channels, timing modules, PID calculation modules, and alarm modules. The independent functions of each module are as follows: The main control board 6 outputs a continuously adjustable analog control current to the proportional valve 2 through the digital-analog output channel. By changing the current magnitude, the valve opening of the proportional valve is linearly adjusted, achieving continuous stepless adjustment of the output airflow pressure from 0 to 100 cmH2O. Simultaneously, it incorporates a built-in current upper limit limiting logic to prevent excessive output current from causing saturation and uncontrolled operation of the proportional valve.

[0021] The main control board 6 periodically controls the power supply to the proportional valve through a timing module, generating pulsed oscillating airflow based on the pressure difference produced by the opening and closing of the proportional valve. It stably outputs a 400Hz-1kHz high-frequency timing interrupt signal, precisely dividing the time axis with a high-frequency subdivision clock to ensure a highly uniform time interval between each opening and closing of the proportional valve. Based on the high-frequency interrupt, frequency division processing is performed to achieve a continuously adjustable oscillation frequency of 0-300bpm. The industry defines a complete "open + close" cycle of the proportional valve as 1bpm, 0bpm represents the valve remaining open without oscillating airflow output, and 300bpm is the maximum oscillation frequency of this device. The high-frequency reference eliminates the periodic jitter caused by low-frequency control, making the pulsed airflow pressure difference stable and the oscillation rhythm uniform, thus improving the consistency of clinical use.

[0022] The PID calculation module receives the actual output pressure collected by the second pressure sensor 5 and calculates the difference between it and the user-preset target pressure to obtain the pressure deviation. Based on the deviation, it runs the PID closed-loop algorithm to dynamically output compensation control current and specifically correct the nonlinearity defect of the proportional valve's own flow-current. At the same time, it limits the maximum output current in real time to avoid the valve port from being fully open and saturated, thereby achieving high-precision constant control of the output pressure.

[0023] The alarm module reads the signals and circuit status of the first pressure sensor 4 and the second pressure sensor in real time. When any of the following fault conditions are met, an audible and visual / signal alarm is activated, and the proportional valve output is locked simultaneously to achieve dual protection for the equipment and the gas user: 1. The first pressure sensor 4 monitors the upstream gas source pressure, which exceeds the preset safety threshold; 2. Any pressure sensor is disconnected or has no effective feedback electrical signal; 3. The measured output pressure of the second pressure sensor 5 continuously deviates from the set allowable range, and the airflow output becomes unstable.

[0024] The main control board is equipped with two A / D analog-to-digital conversion channels, which respectively acquire the analog pressure electrical signals from the first pressure sensor 4 and the second pressure sensor 5, converting the continuous analog voltage output by the sensors into digital signals that the main control board can recognize. It has a built-in digital filtering algorithm to eliminate signal noise caused by air pressure fluctuations and electromagnetic interference from the circuit, improve the accuracy of pressure acquisition, and accurately convert it into physical pressure values ​​such as kPa and cmH2O.

[0025] The steady-state pressure regulation mode of this device: the main control board 6 outputs a continuously varying current to adjust the flow cross-sectional area of ​​the proportional valve orifice, achieving linearly adjustable output pressure of 0-100cmH2O, with a stable output of 15cmH2O under normal clinical conditions; the oscillating gas generation mode of this device: the timing module of the main control board periodically outputs on / off signals to control the proportional valve to cyclically open and close; one opening and closing of the valve forms a complete action cycle, defined as 1 bpm; relying on the alternating pressure difference before and after the valve opening and closing, a pulsed, periodic oscillating airflow is generated.

[0026] The present invention also discloses a method for controlling the generation of vibrating airflow, comprising the following steps: S1. Gas source pressure stabilization pretreatment: An external high-pressure gas source is connected to the pressure reducing valve inlet 101 through the valve body inlet 303. Rotating the pressure regulating knob 102 adjusts the pressure reducing valve outlet 103 to output a constant 150kPa airflow. The airflow is sent to the proportional valve inlet 201 through the internal air passage 305 of the valve body integrated base 3. The first pressure sensor 4 collects the pressure on the output side of the pressure reducing valve in real time. When the pressure exceeds the safe range, the main control board 6 directly activates the alarm module for early warning. S2. Parameter initialization: The target output pressure and target oscillation frequency are entered into the main control board 6. The PID calculation module is initialized, and the proportional, integral and derivative parameters are adjusted. At the same time, the maximum output current limit of the proportional valve is set to avoid valve saturation. The target output pressure adjustment range is 0-100cmH2O. The output pressure is set to 15cmH2O under normal working conditions. S3, Dual-channel real-time pressure acquisition: The first pressure sensor 4 continuously monitors the input air source pressure of the proportional valve 2, and the second pressure sensor 5 acquires the output airflow pressure of the proportional valve 2 in real time. The two pressure analog signals are transmitted to the two A / D analog-to-digital conversion channels of the main control board and converted into digital pressure data after filtering and noise reduction. S4, PID closed-loop correction opening: The main control board 6 calculates the deviation between the measured pressure of the second pressure sensor 5 and the preset target pressure. The PID calculation module outputs a compensation control current based on the deviation, which drives the proportional valve 2 to fine-tune the valve opening through the digital-analog output channel, compensating for the nonlinear characteristics of the proportional valve's flow-current, and stabilizing the output airflow base pressure. S5. Generation of pulsed vibration airflow: The timing module of the main control board 6 uses a stable interruption of 400Hz-1kHz as the timing reference and periodically sends on / off control signals to the proportional valve 2; the proportional valve opens when energized and closes when de-energized, and outputs pulsed vibration airflow based on the opening and closing pressure difference; a single complete opening and closing cycle is measured as 1 bpm; by modifying the frequency division period of the timing module, the oscillation frequency can be continuously and steplessly adjusted in the range of 0-300 bpm; the proportional valve alternately opens and closes to form a periodic pressure difference change, continuously outputting pulsed vibration airflow, and the vibration airflow is output after passing through the proportional valve outlet 203 and the valve body outlet 304; S6. Fault Alarm Protection: The main control board 6 determines three types of fault conditions in real time: gas source overpressure, sensor disconnection, and continuous instability of output pressure. When any fault is triggered, the alarm module starts to issue a warning. At the same time, the main control board 6 limits the output of the proportional valve 2 and cuts off the oscillating airflow to prevent the fault from expanding and damaging the equipment or affecting clinical use.

[0027] Compared with existing piston-type oscillation devices and multi-channel solenoid valve oscillation airflow devices, this invention has the following advantages: The valve body integrates the pressure reducing valve, proportional valve, and two pressure measurement interfaces into a single base, eliminating the need for numerous external hoses and diverter connectors, resulting in a compact and small overall design. The absence of a piston reciprocating mechanical structure eliminates piston wear and jamming issues, leading to low long-term wear and significantly reducing maintenance costs and repair frequency. A single proportional valve can simultaneously achieve static pressure linear regulation and periodic pulse oscillation gas generation, eliminating the need for multiple solenoid valve combinations. It avoids airflow turbulence and pulse pressure fluctuations caused by asynchronous switching of multiple valves, resulting in strong airflow oscillation consistency, simplified control program, and reduced computational load on the main control board. The front-end pressure reducing valve outputs a 150kPa stable gas source, isolating external gas source pressure fluctuations from interference; the downstream second pressure sensor, in conjunction with the PID closed-loop algorithm, corrects the nonlinear output of the proportional valve in real time, and the output pressure is continuously and linearly adjustable from 0 to 100cmH2O. The pressure fluctuation is small during long-term operation, meeting the clinical stable gas supply needs for sputum expectoration. The timing module uses a 400Hz-1kHz high-frequency interrupt as the time reference to finely control the valve opening and closing sequence. The oscillation frequency can be continuously and steplessly adjusted in a wide range of 0-300bpm. The high-frequency clock eliminates the jitter of the oscillation cycle, ensuring uniform intervals between each valve opening and closing, and stable pulse airflow pressure difference. It also prevents sudden airflow shocks, improving patient comfort. The system features a triple fault detection logic, including upstream gas source pressure monitoring, output pressure instability monitoring, and sensor disconnection detection. When a fault occurs, it simultaneously implements dual protection of alarm and output lockout, which can effectively prevent damage to valves or irritation to the patient's airway caused by high pressure impact, no feedback control failure, abnormal airflow, etc., resulting in a higher level of equipment safety. The output pressure and oscillation frequency are independently adjustable: low pressure and low frequency oscillation are suitable for clearing airway secretions in mild cases; high pressure and high frequency oscillation are suitable for deep expectoration of viscous sputum; the 0 bpm mode can be switched to constant and stable airflow output, making it suitable for both dynamic expectoration and routine ventilation, thus broadening the applicability of the device.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A device for generating vibrating airflow, characterized in that, Includes valve body integrated base (3), pressure reducing valve (1), proportional valve (2), first pressure sensor (4), second pressure sensor (5), and main control board (6); The pressure reducing valve (1) and the proportional valve (2) are integrated and installed on the valve body integrated base (3); the pressure reducing valve (1) is provided with a pressure reducing valve inlet (101), a pressure adjusting knob (102), and a pressure reducing valve outlet (103). The pressure reducing valve inlet (101) is used to connect to a high-pressure gas source, the pressure adjusting knob (102) is used to manually adjust the output pressure of the pressure reducing valve, and the pressure reducing valve outlet (103) outputs a constant pressure airflow. The proportional valve (2) is provided with a proportional valve inlet (201), an electrical connection line (202), and a proportional valve outlet (203); the proportional valve inlet (201) is connected to the pressure reducing valve outlet (103) in the air passage; the electrical connection line (202) is electrically connected to the main control board (6) and receives the control current and on / off signal output by the main control board (6); the proportional valve outlet (203) serves as the main outlet of the device to output vibrating airflow; The valve body integrated base (3) has a first sensor interface (301) and a second sensor interface (302). The first sensor interface (301) connects the air path between the outlet (103) of the pressure reducing valve and the inlet (201) of the proportional valve. The first pressure sensor (4) is installed on the first sensor interface (301) to collect the air source pressure on the input side of the proportional valve. The second sensor interface (302) connects the air path on the outlet (203) side of the proportional valve. The second pressure sensor (5) is installed on the second sensor interface (302) to collect the airflow pressure output by the device. The main control board (6) is electrically connected to the electrical connection lines (202) of the first pressure sensor (4), the second pressure sensor (5), and the proportional valve (2); the main control board (6) has built-in analog-to-digital conversion channel, digital-to-analog output channel, timing module, PID calculation module, and alarm module; The main control board (6) outputs different currents through the digital-analog output channel to adjust the valve opening of the proportional valve to control the output airflow pressure / flow rate; the main control board (6) periodically controls the power supply to the proportional valve through the timing module, and generates pulsed vibration airflow by relying on the pressure difference generated by the opening and closing of the proportional valve.

2. The device for generating vibrating airflow according to claim 1, characterized in that, After the pressure reducing valve (1) is adjusted by the pressure regulating knob (102), the pressure reducing valve outlet (103) outputs a constant airflow of 150 kPa at its rated stable pressure.

3. The device for generating vibrating airflow according to claim 1, characterized in that, The timing module generates a stable timing interrupt signal from 400 Hz to 1 kHz; a complete opening and closing cycle of the proportional valve is defined as 1 bpm, and the oscillation frequency adjustment range of this device is 0-300 bpm.

4. The device for generating vibrating airflow according to claim 1, characterized in that, The proportional valve (2) has an output pressure range of 0-100 cmH2O.

5. The device for generating vibrating airflow according to claim 1, characterized in that, The PID calculation module receives the deviation between the measured pressure from the second pressure sensor (5) and the preset target pressure, calculates and outputs the compensation control current, and corrects the nonlinear output of the proportional valve by combining the flow-current characteristic curve of the proportional valve, while limiting the maximum output current to prevent the proportional valve from saturating and running out of control.

6. The device for generating vibrating airflow according to claim 1, characterized in that, The alarm module triggers an alarm under the following conditions: the first pressure sensor (4) detects that the gas source pressure exceeds the preset safety threshold, the pressure sensor is disconnected and there is no feedback signal, and the second pressure sensor (5) measures that the output pressure continuously deviates from the set allowable range.

7. The device for generating vibrating airflow according to claim 1, characterized in that, The main control board (6) is equipped with two A / D analog-to-digital conversion channels, which respectively collect the analog pressure electrical signals of the first pressure sensor (4) and the second pressure sensor (5), and convert the collected signals into actual pressure physical quantities after filtering and noise reduction.

8. A method for controlling the generation of vibrating airflow, characterized in that, An apparatus for generating vibrating airflow according to any one of claims 1-7, comprising the following steps: S1. Gas source pressure stabilization pretreatment: The high-pressure gas source is connected to the inlet of the pressure reducing valve (101). The pressure regulating knob (102) is rotated to adjust the outlet of the pressure reducing valve (103) to output a constant 150kPa airflow to the inlet of the proportional valve (201). The first pressure sensor (4) collects the pressure on the output side of the pressure reducing valve in real time. When the pressure exceeds the safe range, the main control board (6) triggers the alarm module to alarm. S2, Parameter initialization: The main control board (6) inputs the target output pressure and target oscillation frequency, initializes the PID calculation module, and adjusts the parameters and the proportional valve output current limit; S3. Dual-channel pressure real-time acquisition: The first pressure sensor (4) continuously monitors the input air source pressure of the proportional valve, and the second pressure sensor (5) collects the output airflow pressure of the proportional valve outlet in real time and transmits the two pressure analog signals to the main control board (6). S4, PID closed-loop correction opening: The main control board (6) calculates the deviation between the target output pressure and the measured pressure of the second pressure sensor (5), runs the PID calculation module to output compensation current to drive the proportional valve (2), compensates for the nonlinear characteristics of the proportional valve flow-current, and stabilizes the output airflow pressure; S5, Pulse vibration airflow generation: The timing module inside the main control board (6) periodically controls the power supply to the proportional valve (2). The proportional valve (2) opens when powered on and closes when powered off, relying on the opening and closing pressure difference to output pulse vibration airflow; adjust the interruption period of the timing module to continuously adjust the oscillation frequency from 0 to 300 bpm. S6, Fault Alarm Protection: The main control board (6) judges the gas source overpressure, sensor disconnection and output pressure instability faults in real time. When any fault condition is met, the alarm module is activated to warn and the proportional valve output is restricted.

9. The apparatus for generating vibrating airflow according to claim 7, characterized in that, In step S2, the target output pressure adjustment range is 0-100cmH2O, and the output pressure is set to 15cmH2O under normal operating conditions.

10. The apparatus for generating vibrating airflow according to claim 7, characterized in that, In step S5, the timing module uses a stable timing interrupt signal of 400Hz-1kHz to ensure that the opening and closing cycle interval of the proportional valve is uniform and the pulse airflow pressure difference is stable.

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