Non-Invasive Optical Fiber Sensing Vital Signs Monitoring Based on Envelope Extraction BCG Data Processing

An envelope-extraction-based ballistocardiography (BCG) data processing method is proposed with a non-invasive optical fiber sensor in this paper. The accuracy of heart rate calculation value can reach 1.28 ± 0.59 bpm (Mean Absolute Error ± Standard Deviation, MAE ± SD) for one minute of measured data. This designed system can identify human body status and analyze Heart Rate Variability (HRV).