NDLI: Power spectral analysis of walking stability using personal navigation system

Content Provider	IEEE Xplore Digital Library
Author	Tsuruoka, M. Yasuoka, Y. Shibasaki, R. Tianen Chen Akutsu, O. Tanaka, M. Tsuruoka, Y. Murai, S.
Copyright Year	1999
Description	Author affiliation: Inst. of Ind. Sci., Tokyo Univ., Japan (Tsuruoka, M.)
Abstract	This study presents a new developed simple and cordless personal navigation system (PNS). The PNS is a synchronized system consisting of a gyro and magnetic compass sensors, and connected to a small wearable personal computer (WPC) of a wrist watch type. Nickel-hydrogen rechargeable batteries are supplied as the electrical power of both sensors. While walking, the WPC is worn like a wrist watch, the small sensors are fixed to a person's back near the center of body gravity, and batteries are inserted into a person's waist pouch. When a switch is turned on, the serial time count, three relative angles, i.e., roll, pitch and yaw, meterage and absolute direction of the person's back are recorded at 30 cps. They are also displayed on a liquid crystal display on the WPC. In this study, persons who have suffered a pelvic fracture, a foot fracture, or lumbar disk herniation, and normal persons were selected as subjects. In the case of persons who had experienced orthopedic damage, it was observed that the power spectrum density of the three angles and direction of back fluctuation were wavy. In the case of normal persons, it was observed that their power spectrum density was approximately close to 1/f/sup 3/ (f: frequency) fluctuation. This study provides useful information for medical rehabilitation and physical fitness in daily movement.
Starting Page	101
Ending Page	106
File Size	381423
Page Count	6
File Format	PDF
ISBN	0780357310
ISSN	1062922X
DOI	10.1109/ICSMC.1999.814059
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-10-12
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spectral analysis Legged locomotion Stability analysis Magnetic sensors Wearable sensors Back Wrist Watches Batteries Switches
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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