吉首大学学报（自然科学版）2025，Vol.46Issue(2)：31-38,8.DOI:10.13438/j.cnki.jdzk.2025.02.004
一种小型多频FOT呼吸阻抗测量系统的设计与实现
Design and Implementation of a Small Multi-Frequency FOT Respiratory Impedance Measurement System
摘要
Abstract
Based on the forced oscillation principle,a small-scale forced oscillation pulmonary function measurement system with multi-frequency compound mode is designed.Sine signals of four different frequencies(5,10,15,20 Hz)are superimposed as forced oscillation excitation sources,and the superim-posed excitation source signals are output to the loudspeaker through the power amplifier circuit by the STM32F407 processor,generating oscillating airflow to act on the human respiratory system.The flow and pressure signals collected by flow sensor and pressure sensor are processed by variational mode de-composition algorithm to extract pure forced oscillation signals effectively.The experimental verification of airflow resistance measurement and adult repeatability respiratory impedance measurement shows that the system is stable and reliable,and can accurately obtain human respiratory impedance parameters,which is suitable for early detection and evaluation of clinical respiratory diseases.关键词
强迫振荡呼吸阻抗测量系统/STM32F407/变分模态分解/呼吸阻抗测量Key words
forced oscillatory pulmonary function measurement system/STM32F407/variational mode de-composition/respiratory impedance measurement分类
机械工程引用本文复制引用
兰鸿,王兴凡,罗翔,李曙..一种小型多频FOT呼吸阻抗测量系统的设计与实现[J].吉首大学学报（自然科学版）,2025,46(2):31-38,8.基金项目
湖南省自然科学基金资助项目(2022JJ30474) （2022JJ30474）
