A 3-DOF knee joint angle measurement system with inertial and magnetic sensors

Author

Tomaru, Akitomo ; Kobashi, Syoji ; Tsumori, Y. ; Yoshiya, Shinichi ; Kuramoto, Kei ; Imawaki, Seturo ; Hata, Yutaka

Author_Institution

Grad. Sch. of Eng., Univ. of Hyogo, Himeji, Japan

fYear

2010

fDate

10-13 Oct. 2010

Firstpage

1261

Lastpage

1266

Abstract

Quantitative diagnosis of the knee joint dynamics is required to decrease the inner- and intra-observer variability. This paper proposes a noninvasive, unconstrained and free field of measurement system of 3 degree-of-freedom knee joint angles. The proposed system employs a compound sensor of inertial and magnetic sensors. Based on a rigid-body link model, the proposed method enables a measurement system. The experimental results showed that the proposed method estimated the flexion of knee joint angle with a mean displacement of 1.3 deg.

Keywords

biomagnetism; biosensors; magnetic sensors; patient diagnosis; 3-degree-of -freedom knee joint angle measurement system; compound sensor; inertial sensors; innerobserver variability; intraobserver variability; knee joint dynamics; magnetic sensors; mean displacement; quantitative diagnosis; rigid-body link model; Grood´s definition; acceleration vector; angular velocity vector; inertial and magnetic sensor; quaternion; rigid-body link model; terretial magnetic vector;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems Man and Cybernetics (SMC), 2010 IEEE International Conference on

Conference_Location

Istanbul

ISSN

1062-922X

Print_ISBN

978-1-4244-6586-6

Type

conf

DOI

10.1109/ICSMC.2010.5642420

Filename

5642420