Cha, Youngsu Kim, Hojoon Kim, Doik 2024-01-19T23:31:52Z 2024-01-19T23:31:52Z 2021-09-03 2018-02 1424-8220 https://pubs.kist.re.kr/handle/201004/121739 Most motion recognition research has required tight-fitting suits for precise sensing. However, tight-suit systems have difficulty adapting to real applications, because people normally wear loose clothes. In this paper, we propose a gait recognition system with flexible piezoelectric sensors in loose clothing. The gait recognition system does not directly sense lower-body angles. It does, however, detect the transition between standing and walking. Specifically, we use the signals from the flexible sensors attached to the knee and hip parts on loose pants. We detect the periodic motion component using the discrete time Fourier series from the signal during walking. We adapt the gait detection method to a real-time patient motion and posture monitoring system. In the monitoring system, the gait recognition operates well. Finally, we test the gait recognition system with 10 subjects, for which the proposed system successfully detects walking with a success rate over 93%. English MDPI ACCELEROMETERS MOVEMENT RANGE Flexible Piezoelectric Sensor-Based Gait Recognition Article 10.3390/s18020468 1 SENSORS, v.18, no.2 SENSORS 18 2 scie scopus 000427544000151 2-s2.0-85041528362 Chemistry, Analytical Engineering, Electrical & Electronic Instruments & Instrumentation Chemistry Engineering Instruments & Instrumentation Article ACCELEROMETERS MOVEMENT RANGE flexible sensor gait recognition piezoelectric material wearable