Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Trunk Stabilization Measurements Using the Nintendo Wii

닌텐도 위를 활용한 흉부 흔들림의 자세 안정성 측정

  • Yang, Juyeong (PNS, Inc., R&D Center) ;
  • Yoo, Jaeha (Dept. of Electrical and Electronic Engineering, Institute for IT Convergence, Hankyong National University) ;
  • Kim, Dongyon (Dept. of Electrical and Electronic Engineering, Institute for IT Convergence, Hankyong National University) ;
  • Park, Junmo (Division of Computer Information Engineering, Dongseo University) ;
  • Kim, Soochan (Dept. of Electrical and Electronic Engineering, Institute for IT Convergence, Hankyong National University)
  • 양주영 (주식회사 피앤에스 기술연구소) ;
  • 유재하 (한경대학교 전기전자제어공학과, IT융합연구소) ;
  • 김동연 (한경대학교 전기전자제어공학과, IT융합연구소) ;
  • 박준모 (동서대학교 컴퓨터정보공학부) ;
  • 김수찬 (한경대학교 전기전자제어공학과, IT융합연구소)
  • Received : 2014.01.17
  • Accepted : 2014.06.27
  • Published : 2014.07.25
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Abstract

The CTSIB (Clinical Test of Sensory Integration on Balance) using high sensitive pressure sensors is normally used to assess the sense of balance in hospital. It takes an objective measurement of the amount of sway that occurs in the body trunk by observing the change in the center of pressure (CoP) on the foot at the upright posture. In this paper, we would like to propose method to easily measure trunk sway in home. Although the Wii balance board(WBB) is used for games, it can measures the center of pressure, which is highly correlated. The Wii remote controller(WRC) is inexpensive compared to the WBB, but it has problems with estimation of trunk sway because it can't measure pressure directly like WBB. We collected data from 10 normal subjects (5 males, 5 females) from two devices in order to compare the CoP from WBB and the center of mass (CoM) from WRC. The results of WRC and WBB was similar when the data were analyzed by the convex hull and ellipse area.

병원이나 검사실 등에 널리 이용되는 평형 기능 검사법은 고감도 압력센서를 이용한 균형감각조절임상검사(CTSIB, clinical test of sensory integration on balance)이다. 바로 선 자세에서 발바닥의 압력중심(center of pressure)의 변화를 관찰함으로써 흉부 흔들림을 객관적으로 측정한다. 본 논문에서는 가정에서도 손쉽게 흉부의 흔들림을 측정할 수 있는 방법을 제안하고자 한다. 위 밸런스보드(Wii balance board, WBB)는 게임기임에도 불구하고 흉부 흔들림과 상관관계가 높은 압력중심을 측정할 수 있기 때문에 기존의 임상용 제품과 유사한 결과를 보인다. 하지만 위 리모트 컨트롤러(Wii remote controller, WRC)는 WBB보다 저렴하고 손쉽게 구할 수 있음에도 불구하고 흉부 흔들림 분석에서는 압력 측정 방식이 아니기 때문에 기대만큼 활용되지 못하고 있다. 본 연구에서는 정상인 10명(남자:5명, 여자:5명)을 대상으로 WRC의 가속도 정보로부터 convex hull 혹은 ellipse area 분석법을 이용하여 WBB와 유사한 결과를 보였다.

Keywords

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