Journal cover Journal topic
Journal of Sensors and Sensor Systems An open-access peer-reviewed journal
J. Sens. Sens. Syst., 2, 27-34, 2013
https://doi.org/10.5194/jsss-2-27-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Regular research article
30 Apr 2013
Prediction of bed-leaving behaviors using piezoelectric non-restraining sensors
H. Madokoro, N. Shimoi, and K. Sato Faculty of Systems Science and Technology, Akita Prefectural University, 84-4 Tsuchiya Aza Ebinokuchi, Yurihonjo City, Akita, 015-0055, Japan
Abstract. This paper presents a sensor system to predict behavior patterns that occur when patients leave their beds. We originally developed plate-shaped sensors using piezoelectric elements. Existing sensors such as clip sensors and mat sensors require restraint of patients. Moreover, these sensors present privacy problems. The features of our sensors are that they require no power supply or patient restraint. We evaluated our system using a basic experiment to predict seven behavior patterns. We obtained a result of predicted behavior patterns related to bed-leaving using only six sensors installed under a bed. Especially, our system can correctly detect behavior patterns of lateral sitting, which is a position that occurs when a patient tries to leave from the bed, and terminal sitting, which is the position immediately before bed-leaving. They were discerned from other behavior patterns.

Citation: Madokoro, H., Shimoi, N., and Sato, K.: Prediction of bed-leaving behaviors using piezoelectric non-restraining sensors, J. Sens. Sens. Syst., 2, 27-34, https://doi.org/10.5194/jsss-2-27-2013, 2013.
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