Respiratory Rate Real-time Monitoring System with FBGs

In order to monitor respiratory rate in real-time and have good portability, a respiratory rate monitoring system based on fiber optic sensing was designed. According to the testing requirements, the overall composition structure of the system was designed, which is divided into fiber optic sensing module and data processing module. The design basis for the system composition was provided, and the fiber optic sensor and processing module were designed based on respiratory characteristics. The fiber optic sensor is encapsulated in a flexible silicone sheet and then fixed onto a T-shirt. The selection of fixed positions is based on the level of respiratory sensitivity. A power module design for portable structures was provided, and a conversion module from sensor data to respiratory rate was built. Ultimately, the monitoring system will be integrated into a portable device. The experiment collected actual human BCG signals with noise interference and completed the inversion calculation of respiratory rate, with an accuracy better than ± 1bpm. It verifies the feasibility of this system.