Cha, Youngsu Nam, Kihyuk Kim, Doik 2024-01-20T02:03:01Z 2024-01-20T02:03:01Z 2021-09-01 2017-03 1424-8220 https://pubs.kist.re.kr/handle/201004/123032 Monitoring patients using vision cameras can cause privacy intrusion problems. In this paper, we propose a patient position monitoring system based on a patient cloth with unobtrusive sensors. We use flexible sensors based on polyvinylidene fluoride, which is a flexible piezoelectric material. The flexible sensors are inserted into parts close to the knee and hip of the loose patient cloth. We measure electrical signals from the sensors caused by the piezoelectric effect when the knee and hip in the cloth are bent. The measured sensor outputs are transferred to a computer via Bluetooth. We use a custom-made program to detect the position of the patient through a rule-based algorithm and the sensor outputs. The detectable postures are based on six human motions in and around a bed. The proposed system can detect the patient positions with a success rate over 88 percent for three patients. English MDPI POLYVINYLIDENE FLUORIDE MOTION Patient Posture Monitoring System Based on Flexible Sensors Article 10.3390/s17030584 1 SENSORS, v.17, no.3 SENSORS 17 3 scie scopus 000398818700157 2-s2.0-85016164724 Chemistry, Analytical Engineering, Electrical & Electronic Instruments & Instrumentation Chemistry Engineering Instruments & Instrumentation Article POLYVINYLIDENE FLUORIDE MOTION flexible sensor patient cloth piezoelectric material real-time monitoring