Patient Posture Monitoring System Based on Flexible Sensors.
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. Theﬂexiblesensorsareinsertedintopartsclosetothekneeandhipoftheloosepatientcloth. 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.
Center for Robotics Research, Korea Institute of Science and Technology, Seoul 02792, Korea. givemong@kist.re.kr.
Youngsu
Y
Cha
Center for Robotics Research, Korea Institute of Science and Technology, Seoul 02792, Korea. todream623@naver.com.|Department of Mechanical Engineering, Hanyang University, Seoul 04763, Korea. todream623@naver.com.
Kihyuk
K
Nam
Center for Robotics Research, Korea Institute of Science and Technology, Seoul 02792, Korea. doikkim@kist.re.kr.
Doik
D
Kim
D000465:Algorithms; D006801:Humans; D008991:Monitoring, Physiologic; D009038:Motion; D011187:Posture
patient cloth; piezoelectric material; real-time monitoring; ﬂexible sensor