Cited by 128Gait Recognition and AnalysisBalance, Gait, and Falls PreventionContext-Aware Activity Recognition Systems

Gait analysis using gravitational acceleration measured by wearable sensors

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Takeda, Ryo, Tadano, Shigeru, Todoh, Masahiro, Morikawa, Manabu, Nakayasu, Minoru, Yoshinari, Satoshi·2009·Journal of Biomechanics

Abstract

A novel method for measuring human gait posture using wearable sensor units is proposed. The sensor units consist of a tri-axial acceleration sensor and three gyro sensors aligned on three axes. The acceleration and angular velocity during walking were measured with seven sensor units worn on the abdomen and the lower limb segments (both thighs, shanks and feet). The three-dimensional positions of each joint are calculated from each segment length and joint angle. Joint angle can be estimated mechanically from the gravitational acceleration along the anterior axis of the segment. However, the acceleration data during walking includes three major components; translational acceleration, gravitational acceleration and external noise. Therefore, an optimization analysis was represented to separate only the gravitational acceleration from the acceleration data. Because the cyclic patterns of acceleration data can be found during constant walking, a FFT analysis was applied to obtain some characteristic frequencies in it. A pattern of gravitational acceleration was assumed using some parts of these characteristic frequencies. Every joint position was calculated from the pattern under the condition of physiological motion range of each joint. An optimized pattern of the gravitational acceleration was selected as a solution of an inverse problem. Gaits of three healthy volunteers were measured by walking for 20s on a flat floor. As a result, the acceleration data of every segment was measured simultaneously. The characteristic three-dimensional walking could be shown by the expression using a stick figure model. In addition, the trajectories of the knee joint in the horizontal plane could be checked by visual imaging on a PC. Therefore, this method provides important quantitive information for gait diagnosis.

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Crossref · 10.1016/j.jbiomech.2008.10.027

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Authors
Takeda, R., Tadano, S., Todoh, M., Morikawa, M., Nakayasu, M., & Yoshinari, S.
Affiliations
Hokkaido University (JP)
Corresponding author
Tadano, Shigeru
Venue
Journal of Biomechanics
Publisher
Elsevier BV
Published
2009-02
Volume
42
Issue
3
Pages
223-233
ISSN
0021-9290 (ISSN-L)
OpenAlex
W1968266030
Cited by
128
References
22
Citations by year
2026: 1 · 2025: 1 · 2024: 9 · 2023: 4 · 2022: 3 · 2021: 11 · 2020: 6 · 2019: 8 · 2018: 7 · 2017: 10 · 2016: 10 · 2015: 5 · 2014: 11 · 2013: 13 · 2012: 6
FWCI
5.81
Type
journal article
Language
en
Open access
Locations
  • Journal of Biomechanics (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion)
  • Hokkaido University Collection of Scholarly and Academic Papers (Hokkaido University) (submittedVersion)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Gait Recognition and Analysis
  • Health Sciences › Health Professions › Physical Therapy, Sports Therapy and Rehabilitation › Balance, Gait, and Falls Prevention
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
Keywords
gait analysis, gravitational acceleration, wearable sensors, triaxial accelerometer, gyroscope, joint angle estimation, inverse problems, walking
MeSH terms
Adult, Algorithms, Ankle Joint, Biomechanical Phenomena, Biomedical Engineering, Female, Gait, Humans, Knee Joint, Male, Motion

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