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Sensors 2017, 17(3), 584;

Patient Posture Monitoring System Based on Flexible Sensors

Center for Robotics Research, Korea Institute of Science and Technology, Seoul 02792, Korea
Department of Mechanical Engineering, Hanyang University, Seoul 04763, Korea
Author to whom correspondence should be addressed.
Academic Editors: Hyun-Joong Chung and Tae-il Kim
Received: 9 February 2017 / Revised: 9 March 2017 / Accepted: 10 March 2017 / Published: 13 March 2017
(This article belongs to the Special Issue Flexible Electronics and Sensors)
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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. View Full-Text
Keywords: flexible sensor; patient cloth; piezoelectric material; real-time monitoring flexible sensor; patient cloth; piezoelectric material; real-time monitoring

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Cha, Y.; Nam, K.; Kim, D. Patient Posture Monitoring System Based on Flexible Sensors. Sensors 2017, 17, 584.

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