Real-time fluid intake gesture recognition based on batteryless UHF RFID technology

Automatic fluid intake monitoring can be used to ensure adequate hydration in older people. In this study, a real-time fluid intake monitoring system based on the batteryless Ultra High Frequency Radio Frequency Identification (RFID) technology is proposed. The system is simple, unobtrusive, low cost and maintenance-free. Despite the noisy RFID data stream, we demonstrate the efficacy of using a batteryless RFID enabled fluid container to recognize individual instances of drinking (i.e. drinking episodes), in the presence of non-drinking gestures. We conducted experiments with 10 young and 5 older volunteers and achieved F-scores of 87% and 79% for recognizing drinking episodes, respectively.