基于胸阻抗测量法的可穿戴无线呼吸监测系统设计OA

Objective To design a respiratory monitoring device based on thoracic impedance measurement method to meet the demand for accurate monitoring of respiratory function.Methods The respiratory measurement equipment was designed by using the thoracic impedance measurement method,and its host computer program was designed.The digital and analog resources within the CY8C5888 on-chip system were utilized by the hardware part fully to achieve chest impedance measurement on a single chip,and the external Bluetooth module were combined to realize wireless data transmission.The host computer software was developed by LabVIEW and could accept impedance data,filter the data,analyze the respiratory rate and monitor abnormal respiratory rates.Among them,the respiratory rate of the respiratory signal was measured by the dynamic differential threshold method,which could effectively adapt to signal changes and improve the accuracy and real-time performance of detection.Results The respiratory monitoring system was small in size and suitable for wearable measurement.The host computer interface could display the respiratory rate waveform.After actual verification by the human body,the average error between the measured respiratory rate and the actual respiratory rate was 3.54%.The error was generally maintained within an acceptable range and met the technical index requirements for respiratory rate in JJG 1163-2019 Verification Regulation for Multi-Parameter Monitor.It could measure and record breathing signals in real time and issue alarms for abnormal signals.Conclusion This device can effectively adapt to signal changes and improve the accuracy and real-time performance of detection.