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JACIII Vol.25 No.4 pp. 489-497
doi: 10.20965/jaciii.2021.p0489
(2021)

Paper:

Behavior Estimation Based on Multiple Vibration Sensors for Elderly Monitoring Systems

Shuai Shao*, Naoyuki Kubota*, Kazutaka Hotta**, and Takuya Sawayama***

*Graduate School of Systems Design, Tokyo Metropolitan University
6-6 Asahigaoka, Hino, Tokyo 191-0065, Japan

**Kansai Electric Power Co., Inc.
3-11-20 Nakouji, Amagasaki, Hyogo 661-0974, Japan

***New Sensor Incorporated
1-24-3 Yuyamadai, Kawanishi, Hyogo 666-0137, Japan

Received:
September 8, 2020
Accepted:
May 24, 2021
Published:
July 20, 2021
Keywords:
sensor network, behavior estimation, time delay neural network, autocorrelation, elderly monitoring system
Abstract
Behavior Estimation Based on Multiple Vibration Sensors for Elderly Monitoring Systems

Autocorrelation graph of human actives

Aging has become a global social issue nowadays. We want to provide an elderly care system for older people who live alone. Based on the perspective of an informationally structured space (ISS), we have developed a monitoring system by using high-precision vibration sensors. In preliminary experiments, we observed that the autocorrelation coefficient reflected periodic human activities to a certain extent. Therefore, we propose a time delay neural network (TDNN) with autocorrelation as the input to analyze the vibration data. The system can estimate the current state of the elderly. When the system observes any abnormal situation of the elderly, the system can confirm by voice or notify the caregiver, if necessary. In the experiments, we compared the proposed method with traditional TDNNs using raw data as the input. The results demonstrated that proposed methods had performed well when using vibration sensors to measure user behaviors in the bathroom and living room.

Cite this article as:
Shuai Shao, Naoyuki Kubota, Kazutaka Hotta, and Takuya Sawayama, “Behavior Estimation Based on Multiple Vibration Sensors for Elderly Monitoring Systems,” J. Adv. Comput. Intell. Intell. Inform., Vol.25, No.4, pp. 489-497, 2021.
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Last updated on Oct. 25, 2021