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Emergency Condition Discrimination for Single People Using a CO2 Sensor and Body Detectors

Authors: Taiyo Matsumura, Kota Funabashi, Nobumichi Sakai, Takashi Ono


The purpose of this research is to construct a watching system that monitors human activity in a room and detects abnormalities at an early stage to prevent unattended deaths of people living alone. In this article, we propose a method whereby highly urgent abnormal conditions of a person are determined by changes in the concentration of CO2 generated from activity and respiration in a room. We also discussed the effects the amount of activity has on the determination. The results showed that this discrimination method is not dependent on the amount of activity and is effective in judging highly urgent abnormal conditions.

Keywords: Abnormal conditions, multiple sensors, people living alone, respiratory arrest, unattended death, watching system.

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[1] Statistics Bureau, Ministry of Internal Affairs and Communications, "Statistical Look at the Elderly in Japan (65 and Over)," Ministry of Internal Affairs and Communications, 2017, p. 1.
[2] Cabinet Office, "Annual Report on the Aging Society: 2011," Cabinet Office, 2011, pp. 177-186.
[3] Ministry of Health, Labour and Welfare, "Promotion Council for Creating Communities Where Elderlies Can Live Alone with Peace of Mind - Report-" Ministry of Health, Labours and Welfare, 2008, pp. 1-47.
[4] Cabinet Office, "Materials for preventing unattended deaths of victims," Cabinet Office, 2011, pp. 62-74.
[5] Ministry of Health, Labour and Welfare, "Overview of Initiatives for Preventing Unattended deaths," Ministry of Health, Labour and Welfare, 2013, pp.1-21.
[6] K. Kobayashi, and K. Goto, "Development, Present State and New Initiatives of the 'Elderly Person Watching System,'" Journal of Nagoya Gakuin University, Vol. 52, No. 4, 2016, pp. 23-38.
[7] K. Ito, T. Matsumura, H. Miura, and T. Ono, "Study of Discriminate Conditions of Living Alone in Multiple Sensors by using MDS," The 15th SICE System Integration Division Annual Conference, 3M3-3, 2014, pp. 2675-2676.
[8] I. Kamihira, T. Nakajima, T. Matsumura, H. Miura, and T. Ono, "Abnormality Detection of Persons Living Alone Using Daily Life Patterns Obtained from Sensors," WASET International Journal of Computer, Electrical, Automation, Control and Information Engineering, Vol. 7, No. 12, 2013, pp. 1545-1549.
[9] T. Matsumura, I. Kamihira, K. Ito, and T. Ono, "Proposal of the Anomaly Detection Method of Live-alone by LOF using Multiple Sensors," IEEJ Transactions on Fundamentals and Materials, Vol. 135, No. 12, 2015, pp. 749-755.
[10] N. Sakai, T. Matsumura, H. Miura, and T. Ono, "Detection of urgent abnormal condition of single person by CO2 sensor," Article Collection for the 2018 Annual Meeting of the Institute of Electrical Engineers of Japan, 1-057, 2018, p. 79.
[11] M. Cara, "Tentative classification of emergency situations," Planning and organization of emergency medical services, World Health Organization regional office for Europe, 35, 1981, pp. 21-28.
[12] K. Shinozaki, N. Kitamura, T. Hirano, A. Yoshida, and H. Hirasawa, "The analysis of pathophysiology and outcome of hanging", Journal of Japanese Association for Acute Medicine, No. 16, 2005, pp. 573-580.