Body Posture Measurement Based on Textile UHF-RFID Technology

With the development of the healthcare field, multi-application textile tags are worth exploring. In this paper, three types of body postures are tested by a proposed textile UHF-RFID tag, including monitoring a bent knee, a bent elbow and bent back. The RSSI-angle fitting curves on the bent knee and elbow conform to quadratic function models whereas the fitting curve on the back conforms to an exponential function. Through the experimental measurements, the proposed textile UHF-RFID tag is proved to have the feasibility of monitoring the bending level of the three types of body postures by the correspondence between the RSSI and bending angles.