Wearable sleep apnea detection device based on PVDF novel sensor

Purpose: Sleep Apnea Hypopnea Syndrome (SAHS) is a high incidence but little known functional disorder including central apnea sleep apnea syndrome and obstructive apnea sleep apnea hypopnea syndrome, its onset is often difficult to detect. If real-time sleep breathing monitoring can be carried out at home for patients, and an alarm can be issued when they have apnea to attract the attention of people around them, the tragedy can be prevented to the greatest extent. In order to realize real-time breathing monitoring at home, a wearable sleep breathing monitoring device was developed. Through the form of a belt embedded with dual sensors, continuous monitoring of sleep breathing signals can be achieved through normal wearing. Design signal regulation circuit charge conversion, filtering, amplification and other functions. The hardware circuit uses STM32 single chip microcomputer as the core controller to realize the signal analog-to-digital conversion. At the same time, the upper computer is designed by using LabVIEW software to realize the function of real-time display, storage and playback of signal waveform. An alarm is triggered when the breathing rate is abnormal or when the breathing is stopped for more than 10 seconds, and the host computer also has a function such as indicating the success of wearing.