Wheelchair seating evaluation system ∼ Introduction of system functions ∼

A. Hanafusa, K. Ouki, K. Miyazaki, T. Komeda, T. Ikeda, N. Suzuki, A. Hattori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, a system for evaluating the wheelchair seating posture is introduced. The system consists of three subsystems: a seating posture changing system, a seating posture analysis system, and a propulsion analysis system. The seating posture changing system uses pneumatically controlled airbags installed in the wheelchair seat to change the posture of the patient and aims to generate a good posture heuristically. The seating posture analysis system uses seat sensors, video cameras, and whose analysis software to measure and analyze the current posture by seat sensors. One of the features of the analysis system is that the shape of the spine is estimated virtually, as the shape is one of the best indicators of a patient's posture. From the current seating posture, the propulsion analysis system estimates the posture, driving force, and muscular forces necessary to propel the wheelchair. Basic hardware and software for the pneumatically controlled functions have been developed for the posture changing system, and the displacements of the human body were measured by a 3D motion analysis system when four airbags were filled with air independently. A method to estimate the spinal shape by the finite element method (FEM) using beam elements has been developed for the seating posture analysis system. This method has a fast processing time and takes external forces into consideration. A method that can estimate the position of the neutral axis of the spine from markers placed on body surfaces was also developed. For the propulsion analysis system, propulsion motion and muscular forces of a subject in the wheelchair with a seat cushion or a back seat cushion were analyzed. Future work includes the development of the remaining functions, such as the overlay display function of the video camera images and sensor data, and the integration of the entire system.

Original languageEnglish
Title of host publication2012 9th France-Japan and 7th Europe-Asia Congress on Mechatronics, MECATRONICS 2012 / 13th International Workshop on Research and Education in Mechatronics, REM 2012
Pages307-312
Number of pages6
DOIs
Publication statusPublished - 2012 Dec 1
EventJoint 2012 9th France-Japan and 7th Europe-Asia Congress on Mechatronics, MECATRONICS 2012 and 13th International Workshop on Research and Education in Mechatronics, REM 2012 - Paris, France
Duration: 2012 Nov 212012 Nov 23

Publication series

Name2012 9th France-Japan and 7th Europe-Asia Congress on Mechatronics, MECATRONICS 2012 / 13th International Workshop on Research and Education in Mechatronics, REM 2012

Conference

ConferenceJoint 2012 9th France-Japan and 7th Europe-Asia Congress on Mechatronics, MECATRONICS 2012 and 13th International Workshop on Research and Education in Mechatronics, REM 2012
CountryFrance
CityParis
Period12/11/2112/11/23

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Education

Cite this

Hanafusa, A., Ouki, K., Miyazaki, K., Komeda, T., Ikeda, T., Suzuki, N., & Hattori, A. (2012). Wheelchair seating evaluation system ∼ Introduction of system functions ∼. In 2012 9th France-Japan and 7th Europe-Asia Congress on Mechatronics, MECATRONICS 2012 / 13th International Workshop on Research and Education in Mechatronics, REM 2012 (pp. 307-312). [6451025] (2012 9th France-Japan and 7th Europe-Asia Congress on Mechatronics, MECATRONICS 2012 / 13th International Workshop on Research and Education in Mechatronics, REM 2012). https://doi.org/10.1109/MECATRONICS.2012.6451025