Lung function test system based on pulse oscillation

Abstract

The invention relates to the technical field of lung function testing, in particular to a lung function testing system based on pulse oscillation. According to the designed system, efficient coordination and automatic control among the modules are achieved through the core function of the comprehensive control end, the whole process from signal generation to data processing and output display is highly integrated and automatic, particularly, in the aspect of data analysis, the spectrum analysis technology and a parameter calculation unit are introduced, and the data analysis efficiency is improved. Different components of respiratory impedance can be accurately separated and calculated, and key parameters are extracted, so that more detailed and accurate lung function evaluation is provided, the automation degree and data analysis of the system are remarkably improved, related technical requirements are met, and the system is suitable for large-scale popularization and application. The technical problem that an existing pulse oscillation lung function testing system still needs to be improved in the aspects of automation degree and data analysis is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pulmonary function testing, and particularly to a pulmonary function testing system based on impulse oscillation. Background Art

[0002] Currently, pulmonary function testing plays a crucial role in the diagnosis and evaluation of respiratory diseases. However, traditional pulmonary function testing methods, such as pulmonary ventilation examinations, often require the subject to cooperate in performing special actions such as forced breathing or breath-holding, which may be difficult for specific groups such as the elderly, children, and critically ill patients. In addition, the respiratory physiological indicators provided by traditional testing methods are relatively limited and it is difficult to meet the clinical need for in-depth understanding of the functional changes in respiratory diseases.

[0003] As a new detection method, impulse oscillation (IOS) pulmonary function measurement technology measures the change in the flow rate of the respiratory system in response to an externally applied pressure signal, thereby measuring the respiratory resistance, avoiding the requirement for subject cooperation, and providing rich indicators including total respiratory impedance, viscous resistance, elastic resistance, and inertial resistance.

[0004] However, the existing impulse oscillation pulmonary function testing systems still need to be improved in terms of automation and data analysis. Summary of the Invention

[0005] The purpose of the present invention is to provide a pulmonary function testing system based on impulse oscillation, aiming to solve the technical problem that the existing impulse oscillation pulmonary function testing systems still need to be improved in terms of automation and data analysis in the prior art.

[0006] To achieve the above purpose, a pulmonary function testing system based on impulse oscillation adopted by the present invention includes a signal generation module, a respiratory impedance measurement module, a data processing module, an output display module, and a comprehensive control terminal. The signal generation module includes a vibrator unit and a signal amplification unit. The respiratory impedance testing module includes a flow sensor unit and a pressure sensor unit. The data processing module includes a spectrum analysis unit and a parameter calculation unit. The output display module includes a display screen unit and a data communication unit. The signal generation module, the respiratory impedance measurement module, the data processing module, and the output display module are all connected to the comprehensive control terminal;

[0007] The vibrator unit is used as a signal source to generate an externally applied pressure signal mainly composed of vibration waves, and the signal amplification unit amplifies the generated externally applied pressure signal;

[0008] The flow sensor unit is used to measure the change in flow rate of the respiratory system in response to the pressure signal and to capture the change in respiratory airflow caused by the applied pressure signal. The pressure sensor unit measures the pressure change in the respiratory system and combines it with the data from the flow sensor unit to calculate the respiratory impedance.

[0009] The spectrum analysis unit uses computer spectrum analysis technology to perform spectrum analysis on the data collected by the flow sensor unit and the pressure sensor unit, and separates the respiratory impedance components at different frequencies. The parameter calculation unit calculates the total respiratory impedance, the sum of viscous resistance, elastic resistance and inertial resistance, and key parameters of the response frequency based on the results of the spectrum analysis;

[0010] The display screen unit displays the calculated parameters in an intuitive manner, and the data communication unit is used to export data or communicate with other devices;

[0011] The integrated control terminal serves as the core of the entire system and is responsible for coordinating the work of various modules and units. It receives signal instructions from the signal generation module, controls the acquisition operation of the respiratory impedance measurement module, receives and processes the calculation results of the data processing module, and finally displays the results on the output display module.

[0012] The parameter calculation unit includes an impedance calculation subunit, a component separation subunit and a key parameter extraction subunit, and the impedance calculation subunit, the component separation subunit and the key parameter extraction subunit are all connected to the integrated control terminal;

[0013] The impedance calculation subunit calculates the total impedance of the respiratory system based on the flow and pressure data;

[0014] The component separation subunit separates different impedance components of viscous resistance, elastic resistance and inertial resistance using the spectrum analysis result;

[0015] The key parameter extraction subunit extracts key parameters of total respiratory impedance, viscous resistance, X5 and response frequency from the impedance component.

[0016] Wherein, the display screen unit includes a graphic display subunit and a text display subunit, and both the graphic display subunit and the text display subunit are connected to the integrated control terminal;

[0017] The graphic display subunit is used to intuitively display the calculated parameters in the form of charts and curves;

[0018] The text display subunit is used to display parameter values and test result information in text form.

[0019] Among them, the data communication unit includes a wired communication subunit and a wireless communication subunit, and both the wired communication subunit and the wireless communication subunit are connected to the integrated control terminal;

[0020] The wired communication subunit is used for data transmission with other devices through wired interfaces such as USB and RS-232;

[0021] The wireless communication subunit is used to realize remote data transmission and sharing by using wireless technologies such as Bluetooth and Wi-Fi.

[0022] Among them, the integrated control terminal includes a central processor subunit, an instruction sending subunit, a data acquisition control subunit, and a result display control subunit;

[0023] The central processor subunit is responsible for receiving and processing signals and data from each module;

[0024] The instruction sending subunit is used to send instructions to the signal generation module to control it to generate specific external pressure signals;

[0025] The data acquisition control subunit is used to control the acquisition operation of the respiratory impedance measurement module;

[0026] The result display control subunit is used to control the calculation results of the data processing module to be displayed on the output display module in a specified manner.

[0027] Among them, the pulmonary function test system based on impulse oscillation further includes a calibration module, and the calibration module includes a zero-point calibration unit, a full-scale calibration unit, and an automatic calibration control unit. Both the zero-point calibration unit, the full-scale calibration unit, and the automatic calibration control unit are connected to the integrated control terminal;

[0028] The zero-point calibration unit is used to perform zero-point calibration on the flow sensor unit and the pressure sensor unit before the test starts;

[0029] The full-scale calibration unit is used to perform full-scale calibration on the flow sensor unit and the pressure sensor unit by applying known pressure and flow signals to the respiratory system;

[0030] The automatic calibration control unit is responsible for coordinating the operations of the zero-point calibration unit and the full-scale calibration unit, automatically executing the calibration process according to the preset calibration procedures and standards, and recording the calibration results for subsequent analysis and verification.

[0031] Among them, the lung function testing system based on impulse oscillation further includes a storage module, which includes an original data acquisition and storage unit, a processing result storage unit, and a data security protection unit. The original data acquisition and storage unit, the processing result storage unit, and the data security protection unit are all connected to the comprehensive control terminal;

[0032] The original data acquisition and storage unit is responsible for real-time acquisition and storage of the original data output by the flow sensor unit and the pressure sensor unit;

[0033] The processing result storage unit is used to store the data processed by the spectrum analysis unit and the parameter calculation unit;

[0034] The data security protection unit is used to ensure that the stored data is not accessed, tampered with, or lost without authorization, protecting patient privacy and the integrity of test results.

[0035] A lung function testing system based on impulse oscillation of the present invention includes a signal generation module, a respiratory impedance measurement module, a data processing module, an output display module, and a comprehensive control terminal. The signal generation module includes a vibrator unit and a signal amplification unit. The respiratory impedance test module includes a flow sensor unit and a pressure sensor unit. The data processing module includes a spectrum analysis unit and a parameter calculation unit. The output display module includes a display screen unit and a data communication unit. Through the core role of the comprehensive control terminal, the system realizes efficient coordination and automatic control among various modules. From signal generation to data processing and output display, the entire process is highly integrated and automated. Especially in data analysis, the system introduces spectrum analysis technology and a parameter calculation unit, which can accurately separate and calculate different components of respiratory impedance, extract key parameters, thereby providing a more detailed and accurate lung function assessment. Therefore, the system has significant improvements in both automation and data analysis, meeting the relevant technical requirements and effectively solving the technical problems that the existing impulse oscillation lung function testing systems still need to be improved in terms of automation and data analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] Figure 1 It is a schematic diagram of the principle of the lung function testing system based on impulse oscillation of the present invention.

[0038] Figure 2 It is a schematic diagram of the principle of the parameter calculation unit in the pulmonary function test system based on impulse oscillation of the present invention.

[0039] Figure 3 It is a schematic diagram of the principle of the display screen unit in the pulmonary function test system based on impulse oscillation of the present invention.

[0040] Figure 4 It is a schematic diagram of the principle of the data communication unit in the pulmonary function test system based on impulse oscillation of the present invention.

[0041] Figure 5 It is a schematic diagram of the principle of the integrated control terminal in the pulmonary function test system based on impulse oscillation of the present invention.

[0042] Figure 6 It is a schematic diagram of the principle of the calibration module in the pulmonary function test system based on impulse oscillation of the present invention.

[0043] Figure 7 It is a schematic diagram of the principle of the storage module in the pulmonary function test system based on impulse oscillation of the present invention.

[0044] Figure 8 It is a schematic diagram of the principle of the visualization module in the pulmonary function test system based on impulse oscillation of the present invention.

[0045] Figure 9 It is a schematic diagram of the principle of the fault detection module in the pulmonary function test system based on impulse oscillation of the present invention.

[0046] 1 - Signal generation module, 2 - Respiratory impedance measurement module, 3 - Data processing module, 4 - Output display module, 5 - Comprehensive control terminal, 6 - Vibrator unit, 7 - Signal amplification unit, 8 - Flow sensor unit, 9 - Pressure sensor unit, 10 - Spectrum analysis unit, 11 - Parameter calculation unit, 12 - Display screen unit, 13 - Data communication unit, 14 - Impedance calculation sub - unit, 15 - Component separation sub - unit, 16 - Key parameter extraction sub - unit, 17 - Graphic display sub - unit, 18 - Text display sub - unit, 19 - Wired communication sub - unit, 20 - Wireless communication sub - unit, 21 - Central processor sub - unit, 22 - Instruction sending sub - unit, 23 - Data acquisition control sub - unit, 24 - Result display control sub - unit, 25 - Calibration module, 26 - Zero - point calibration unit, 27 - Full - scale calibration unit, 28 - Automatic calibration control unit, 29 - Storage module, 30 - Raw data acquisition and storage unit, 31 - Processed result storage unit, 32 - Data security protection unit, 33 - Visualization module, 34 - Fault detection module, 35 - Three - dimensional visualization unit, 36 - Dynamic demonstration unit, 37 - Interactive interface unit, 38 - Sensor fault detection unit, 39 - Signal processing fault detection unit, 40 - System communication fault detection unit, 41 - Comprehensive fault alarm unit. Detailed implementation manners

[0047] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0048] Please refer to Figures 1 to 9 , the present invention provides a pulmonary function test system based on pulse oscillation, including a signal generation module 1, a respiratory impedance measurement module 2, a data processing module 3, an output display module 4 and a comprehensive control terminal 5. The signal generation module 1 includes a vibrator unit 6 and a signal amplification unit 7. The respiratory impedance test module includes a flow sensor unit 8 and a pressure sensor unit 9. The data processing module 3 includes a spectrum analysis unit 10 and a parameter calculation unit 11. The output display module 4 includes a display screen unit 12 and a data communication unit 13. The signal generation module 1, the respiratory impedance measurement module 2, the data processing module 3 and the output display module 4 are all connected to the comprehensive control terminal 5;

[0049] The vibrator unit 6 is used as a signal source to generate an external pressure signal mainly composed of vibration waves, and the signal amplification unit 7 amplifies the generated external pressure signal;

[0050] The flow sensor unit 8 is used to measure the flow rate change of the respiratory system in response to a pressure signal and capture the respiratory airflow changes caused by the applied pressure signal. The pressure sensor unit 9 measures the pressure changes within the respiratory system and, in combination with the data from the flow sensor unit 8, is jointly used to calculate the respiratory impedance;

[0051] The spectrum analysis unit 10 uses computer spectrum analysis technology to perform spectrum analysis on the data collected by the flow sensor unit 8 and the pressure sensor unit 9, and separates the respiratory impedance components at different frequencies. The parameter calculation unit 11 calculates key parameters such as the total respiratory impedance, the sum of viscous resistance, elastic resistance, and inertial resistance, and the response frequency based on the results of the spectrum analysis;

[0052] The display screen unit 12 displays the calculated parameters in an intuitive manner. The data communication unit 13 is used to export data or communicate with other devices;

[0053] The comprehensive control terminal 5 serves as the core of the entire system. The comprehensive control terminal 5 is responsible for coordinating the work of each module and unit. It receives signal instructions from the signal generation module 1, controls the acquisition operation of the respiratory impedance measurement module 2, receives and processes the calculation results of the data processing module 3, and finally displays the results on the output display module.

[0054] In this embodiment, an applied pressure signal mainly in the form of a vibration wave is generated by the vibrator unit 6, amplified by the signal amplification unit 7 and then acts on the respiratory system. The flow sensor unit 8 and the pressure sensor unit 9 are used to measure the flow rate and pressure changes of the respiratory system, and then calculate the respiratory impedance. The data processing module 3 performs spectrum analysis and parameter calculation on the collected data, and finally intuitively displays the test results through the output display module 4. The comprehensive control terminal 5 is responsible for coordinating the operation of the entire system.

[0055] Furthermore, the parameter calculation unit 11 includes an impedance calculation sub-unit 14, a component separation sub-unit 15, and a key parameter extraction sub-unit 16. The impedance calculation sub-unit 14, the component separation sub-unit 15, and the key parameter extraction sub-unit 16 are all connected to the comprehensive control terminal 5;

[0056] The impedance calculation sub-unit 14 calculates the total impedance of the respiratory system based on the flow rate and pressure data;

[0057] The component separation sub-unit 15 uses the results of the spectrum analysis to separate different impedance components of viscous resistance, elastic resistance, and inertial resistance;

[0058] The key parameter extraction subunit 16 extracts key parameters of total respiratory impedance, viscous resistance, X5, and response frequency from the impedance components.

[0059] In this embodiment, the impedance calculation subunit 14, the component separation subunit 15, and the key parameter extraction subunit 16 are respectively responsible for calculating the total impedance of the respiratory system, separating different impedance components, and extracting key parameters, so as to more accurately reflect the functional state of the respiratory system.

[0060] Further, the display screen unit 12 includes a graphic display subunit 17 and a text display subunit 18, and both the graphic display subunit 17 and the text display subunit 18 are connected to the comprehensive control terminal 5;

[0061] The graphic display subunit 17 is used to visually display the calculated parameters in the form of charts and curves;

[0062] The text display subunit 18 is used to display parameter values and test result information in text form.

[0063] In this embodiment, through the graphic display subunit 17 and the text display subunit 18, the calculated parameters can be visually displayed in the form of charts and curves respectively, and the parameter values and test result information can be displayed in text form, improving the readability and usability of the test results.

[0064] Further, the data communication unit 13 includes a wired communication subunit 19 and a wireless communication subunit 20, and both the wired communication subunit 19 and the wireless communication subunit 20 are connected to the comprehensive control terminal 5;

[0065] The wired communication subunit 19 is used to perform data transmission with other devices through wired interfaces such as USB and RS-232;

[0066] The wireless communication subunit 20 is used to realize remote data transmission and sharing by using wireless technologies such as Bluetooth and Wi-Fi.

[0067] In this embodiment, through the wired communication subunit 19 and the wireless communication subunit 20, data transmission with other devices can be realized respectively through wired interfaces such as USB and RS-232 and wireless technologies such as Bluetooth and Wi-Fi, improving the flexibility and convenience of data exchange.

[0068] Further, the comprehensive control terminal 5 includes a central processor subunit 21, an instruction sending subunit 22, a data acquisition control subunit 23, and a result display control subunit 24;

[0069] The central processing unit subunit 21 is responsible for receiving and processing signals and data from each module;

[0070] The instruction sending subunit 22 is used to send instructions to the signal generating module 1 to control it to generate specific external pressure signals;

[0071] The data acquisition control subunit 23 is used to control the acquisition operation of the respiratory impedance measurement module 2;

[0072] The result display control subunit 24 is used to control the calculation results of the data processing module 3 to be displayed on the output display module 4 in a specified manner.

[0073] In this embodiment, through the central processing unit subunit 21, the instruction sending subunit 22, the data acquisition control subunit 23, and the result display control subunit 24, they are respectively responsible for receiving and processing signals, sending instructions, controlling data acquisition, and displaying results, thereby ensuring the coordinated operation and high efficiency of the system.

[0074] Furthermore, the impulse oscillation-based pulmonary function test system further includes a calibration module 25. The calibration module 25 includes a zero calibration unit 26, a full-scale calibration unit 27, and an automatic calibration control unit 28. The zero calibration unit 26, the full-scale calibration unit 27, and the automatic calibration control unit 28 are all connected to the integrated control terminal 5;

[0075] The zero calibration unit 26 is used to perform zero calibration on the flow sensor unit 8 and the pressure sensor unit 9 before the test starts;

[0076] The full-scale calibration unit 27 is used to perform full-scale calibration on the flow sensor unit 8 and the pressure sensor unit 9 by applying known pressure and flow signals to the respiratory system;

[0077] The automatic calibration control unit 28 is responsible for coordinating the operations of the zero calibration unit 26 and the full-scale calibration unit 27, automatically executing the calibration process according to the preset calibration procedures and standards, and recording the calibration results for subsequent analysis and verification.

[0078] In this embodiment, through the zero calibration unit 26, the full-scale calibration unit 27, and the automatic calibration control unit 28, zero calibration and full-scale calibration can be performed on the flow sensor unit 8 and the pressure sensor unit 9 before the test starts to ensure the accuracy and consistency of the test results. The automatic calibration control unit 28 is responsible for coordinating the calibration process and recording the calibration results, improving the automation degree and calibration efficiency of the system.

[0079] Further, the impulse oscillation-based pulmonary function testing system further includes a storage module 29, which includes an original data acquisition and storage unit 30, a processing result storage unit 31, and a data security protection unit 32. The original data acquisition and storage unit 30, the processing result storage unit 31, and the data security protection unit 32 are all connected to the comprehensive control terminal 5;

[0080] The original data acquisition and storage unit 30 is responsible for real-time acquisition and storage of the original data output by the flow sensor unit 8 and the pressure sensor unit 9;

[0081] The processing result storage unit 31 is used to store the data processed by the spectrum analysis unit 10 and the parameter calculation unit 11;

[0082] The data security protection unit 32 is used to ensure that the stored data is not accessed, tampered with, or lost without authorization, protecting patient privacy and the integrity of test results.

[0083] In this embodiment, by adding the storage module 29, real-time acquisition, storage, and protection of test data are achieved, improving data security and traceability.

[0084] Further, the impulse oscillation-based pulmonary function testing system further includes a visualization module 33 and a fault detection module 34. The visualization module 33 and the fault detection module 34 are both connected to the comprehensive control terminal 5.

[0085] Further, the visualization module 33 includes a three-dimensional visualization unit 35, a dynamic demonstration unit 36, and an interactive interface unit 37. The three-dimensional visualization unit 35, the dynamic demonstration unit 36, and the interactive interface unit 37 are all connected to the comprehensive control terminal 5;

[0086] The three-dimensional visualization unit 35 is used to display parameters such as impedance, flow rate, and pressure of the respiratory system in the form of three-dimensional graphics using three-dimensional graphics technology;

[0087] The dynamic demonstration unit 36 is used to display the real-time data during the test in the form of animations or dynamic charts;

[0088] The interactive interface unit 37 is used to provide a user-friendly interactive interface, allowing doctors to interact with the system through input devices such as mice and keyboards.

[0089] In this embodiment, the internal state and parameter changes of the respiratory system can be more intuitively displayed through the three-dimensional visualization unit 35, which helps doctors make more accurate diagnoses and analyses. The dynamic demonstration unit 36 can dynamically display the testing process to help doctors better understand the respiratory function status of patients. The interactive interface unit 37 improves the usability and flexibility of the system, facilitating doctors to operate and analyze according to their own needs.

[0090] Furthermore, the fault detection module 34 includes a sensor fault detection unit 38, a signal processing fault detection unit 39, a system communication fault detection unit 40, and an integrated fault alarm unit 41. The sensor fault detection unit 38, the signal processing fault detection unit 39, the system communication fault detection unit 40, and the integrated fault alarm unit 41 are all connected to the integrated control terminal 5;

[0091] The sensor fault detection unit 38 is used to monitor the working states of the flow sensor unit 8 and the pressure sensor unit 9 in real time;

[0092] The signal processing fault detection unit 39 is used to monitor the signal processing processes in the signal generation module 1 and the data processing module 3;

[0093] The system communication fault detection unit 40 is used to monitor the working state of the data communication unit 13;

[0094] The integrated fault alarm unit 41 is used to send an alarm signal to the user when any fault is detected.

[0095] In this embodiment, the sensor fault detection unit 38 can timely detect sensor faults, avoiding errors in test results and damage to the system; the signal processing fault detection unit 39 can ensure the accuracy and stability of the signal processing process, improving the reliability of test results; the system communication fault detection unit 40 can timely detect communication faults, ensuring the integrity of data and the remote communication ability of the system; the integrated fault alarm unit 41 can remind the user to timely handle faults, avoiding the expansion of faults and errors in test results.

[0096] In the present invention, the subject can breathe spontaneously without the need to cooperate with special actions such as forced breathing or breath holding. The testing process is more physiological; and it has a wide range of applications, especially suitable for subjects who cannot complete traditional pulmonary function examinations such as pulmonary ventilation examinations, such as the elderly, children, and critically ill patients, etc. At the same time, it can provide rich respiratory physiological indicators such as viscous resistance, elastic resistance, and inertial resistance, enabling a deeper understanding of the functional changes of respiratory diseases. Factors such as the degree of subject cooperation have little influence, the results have good repeatability, and can more stably reflect the dynamic characteristics of the patient's respiratory physiology.

[0097] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A pulmonary function testing system based on impulse oscillation, characterized in that it includes a signal generation module, a respiratory impedance measurement module, a data processing module, an output display module and an integrated control terminal. The signal generation module includes a vibrator unit and a signal amplification unit. The respiratory impedance test module includes a flow sensor unit and a pressure sensor unit. The data processing module includes a spectrum analysis unit and a parameter calculation unit. The output display module includes a display screen unit and a data communication unit. The signal generation module, the respiratory impedance measurement module, the data processing module and the output display module are all connected to the integrated control terminal; The vibrator unit is used as a signal source to generate an external pressure signal mainly composed of vibration waves, and the signal amplification unit amplifies the generated external pressure signal; The flow sensor unit is used to measure the change in the flow rate of the respiratory system in response to the pressure signal, and capture the change in the respiratory airflow caused by the external pressure signal. The pressure sensor unit measures the pressure change in the respiratory system and, combined with the data of the flow sensor unit, is jointly used to calculate the respiratory impedance; The spectrum analysis unit uses computer spectrum analysis technology to perform spectrum analysis on the data collected by the flow sensor unit and the pressure sensor unit, and separates the respiratory impedance components at different frequencies. The parameter calculation unit calculates the key parameters of the total respiratory impedance, viscous resistance, elastic resistance, the sum of inertial resistance and response frequency based on the results of the spectrum analysis; The display screen unit displays the calculated parameters in an intuitive manner, and the data communication unit is used to export data or communicate with other devices; The integrated control terminal serves as the core of the entire system. The integrated control terminal is responsible for coordinating the work of each module and unit. It receives the signal instructions from the signal generation module, controls the acquisition operation of the respiratory impedance measurement module, receives and processes the calculation results of the data processing module, and finally displays the results on the output display module.

2. The pulmonary function testing system based on impulse oscillation according to claim 1, characterized in that the parameter calculation unit includes an impedance calculation sub-unit, a component separation sub-unit and a key parameter extraction sub-unit. The impedance calculation sub-unit, the component separation sub-unit and the key parameter extraction sub-unit are all connected to the integrated control terminal; The impedance calculation sub-unit calculates the total impedance of the respiratory system based on the flow and pressure data; The component separation sub-unit separates the different impedance components of viscous resistance, elastic resistance and inertial resistance by using the spectrum analysis results; The key parameter extraction sub-unit extracts the key parameters of the total respiratory impedance, viscous resistance, X5 and response frequency from the impedance components.

3. The pulmonary function testing system based on impulse oscillation according to claim 2, characterized in that the display screen unit includes a graphic display sub-unit and a text display sub-unit. The graphic display sub-unit and the text display sub-unit are all connected to the integrated control terminal; The graphic display sub-unit is used to intuitively display the calculated parameters in the form of charts and curves; The text display subunit is used to display the parameter values and test result information in text form.

4. The impulse oscillation-based pulmonary function testing system according to claim 3, characterized in that the data communication unit includes a wired communication subunit and a wireless communication subunit, and both the wired communication subunit and the wireless communication subunit are connected to the integrated control terminal; the wired communication subunit is used to perform data transmission with other devices through wired interfaces such as USB and RS-232; the wireless communication subunit is used to realize remote data transmission and sharing by using wireless technologies such as Bluetooth and Wi-Fi.

5. The impulse oscillation-based pulmonary function testing system according to claim 4, characterized in that the integrated control terminal includes a central processor subunit, an instruction sending subunit, a data acquisition control subunit, and a result display control subunit; the central processor subunit is used to be responsible for receiving and processing signals and data from each module; the instruction sending subunit is used to send instructions to the signal generation module to control it to generate specific external pressure signals; the data acquisition control subunit is used to control the acquisition operation of the respiratory impedance measurement module; the result display control subunit is used to control the calculation results of the data processing module to be displayed on the output display module in a specified manner.

6. The impulse oscillation-based pulmonary function testing system according to claim 5, characterized in that the impulse oscillation-based pulmonary function testing system further includes a calibration module, and the calibration module includes a zero-point calibration unit, a full-scale calibration unit, and an automatic calibration control unit. The zero-point calibration unit, the full-scale calibration unit, and the automatic calibration control unit are all connected to the integrated control terminal; the zero-point calibration unit is used to perform zero-point calibration on the flow sensor unit and the pressure sensor unit before the test starts; the full-scale calibration unit is used to perform full-scale calibration on the flow sensor unit and the pressure sensor unit by applying known pressure and flow signals to the respiratory system; the automatic calibration control unit is responsible for coordinating the operations of the zero-point calibration unit and the full-scale calibration unit, automatically executing the calibration process according to the preset calibration procedures and standards, and recording the calibration results for subsequent analysis and verification.

7. The impulse oscillation-based pulmonary function testing system according to claim 6, characterized in that the impulse oscillation-based pulmonary function testing system further includes a storage module, and the storage module includes a raw data acquisition and storage unit, a processing result storage unit, and a data security protection unit. The raw data acquisition and storage unit, the processing result storage unit, and the data security protection unit are all connected to the integrated control terminal; the raw data acquisition and storage unit is used to be responsible for real-time acquisition and storage of the raw data output by the flow sensor unit and the pressure sensor unit; the processing result storage unit is used to store the data processed by the spectrum analysis unit and the parameter calculation unit; The data security protection unit is used to ensure that the stored data is not accessed, tampered with or lost without authorization, protecting patient privacy and the integrity of test results.

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