The Duo Plus sleep monitor uses imported PVDF sensors based on the BCG monitoring principle. It monitors vibration signals caused by body movements, chest expansion and contraction, and heart pumping. The sensors convert these signals into electrical signals, which are then processed through amplification, filtering, and algorithmic analysis to detect heart rate, breathing, body movement, snoring, and other data. This data is then uploaded to the user’s phone and server via WiFi or 4G cellular networks. It also utilizes a proprietary flexible piezoresistive sensor to detect bed occupancy, significantly improving the stability of sleep status determination and enabling data separation between left and right users.