Daisy-chain Shape Wearable Health Monitoring System by Using Fuzzy Logic Heart-Rate Extraction

Abstract

Continuous human monitoring will be substantially useful to realize a high quality of life society. In the previous work, we fabricated a prototype system for monitoring an electrocardiograph, heart rate (HR), 3 axes human body acceleration and temperature for human body and human circumstances, simultaneously. These data are transmitted to the host PC and analyzed for the human activities or conditions recognitions. Above all a heart rate variability (HRV) that calculated from HR is extremely valuable for recognizing a mental or physical stress of human subjects. In this study, we demonstrate a fuzzy logic HR extraction algorithm on the daisy chain shaped wearable prototype device to realize an autonomous HRV monitoring system. On-board fuzzy logic algorithm not only reduces the communication traffic but also improves an accuracy of the HR extraction comparing to the simple threshold methods.

Keywords::

• Health Monitoring System
• Pastable Device
• Heart Rate Variability (HRV)
• Fuzzy Logic

Additional information

Notes on contributors

Takayuki Fujita

Takayuki Fujita received his PhD degrees from the Himeji Institute of Technology, Japan, in 2000. He is currently an associate professor in the Department of Electrical Engineering and Computer Sciences, University of Hyogo. His research topics are MEMS and energy harvesting devices.

Tomoya Tanaka

Tomoya Tanaka received his BE degrees from University of Hyogo, Japan, in 2011. He is currently pursuing his ME degree at University of Hyogo.

Koji Sonoda

Koji Sonoda received his ME degrees from University of Hyogo, Japan, in 2010. He is currently pursuing his PhD degree at University of Hyogo.

Manabu Nii

Manabu Nii received PhD from Osaka Prefecture University in 2001. Presently, he is working as Assistant Professor, Graduate School of Engineering, University of Hyogo. His research interests are Computational Intelligence.

Kensuke Kanda

Kensuke Kanda received his BE, ME and PhD degrees in mechanical engineering from Tokyo Metropolitan University, Japan, in 2000, 2003, and 2006, respectively. Since 2010, he has been an Assistant professor in the University of Hyogo.

Kohei Higuchi

Kohei Higuchi received his PhD degree from the University of Tokyo in 1978. He then joined Central Research Laboratories at NEC Corporation. He is currently a research manager at the Maenaka Human-Sensing Fusion Project of Japan Science and Technology Agency.

Kazusuke Maenaka

Kazusuke Maenaka received his PhD degrees from Toyohashi University of Technology, Japan, in 1990. Since 1993, he has been with the Department of Electronics of the Himeji Institute of Technology. By unification of universities in the Hyogo prefecture in April 2004, he joined University of Hyogo, where he is presently a professor. Since 2008, he has been the project leader of the Maenaka Human-Sensing Fusion Project.