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Walking Assistive Shoes for Visually Impaired Person Using Infrared Sensor and Pressure Sensor

적외선 센서와 압력센서를 이용한 시각장애인용 보행보조신발

  • 양창민 (전북대학교 헬스케어공학과) ;
  • 정지용 (전북대학교 바이오메디컬공학부) ;
  • 김정자 (전북대학교 바이오메디컬공학부)
  • Received : 2017.03.13
  • Accepted : 2017.05.10
  • Published : 2017.05.31

Abstract

The white cane, walking assistive device of visually impaired person, has disadvantages for acquiring the information by contacting obstacles directly and detecting low obstacle on the ground. Recently, new devices have been developing to solve these problems, but these were not widely used due to high price and appearance. Therefore, in this study, we developed two types of walking assistive shoes which were manufactured with infrared sensors, pressure sensors and vibrating motors. Two types of shoes were classified with single sensor (SS) and double sensor (DS) type according to the number of infrared sensor. To evaluate the effectiveness, we compared required time and number of collisions during walking with walking assistive shoes and white cane on obstacle area. As the results, required time was increased than white cane while number of collisions was decreased when walking with developed walking assistive shoes. In addition, required time and number of collisions was more reduced when using walking assistive device than white cane. Therefore, we suggests that developed walking assistive shoes can a great help to provide safe walking condition and reducing time to adapt new types of walking assistive shoes.

시각장애인의 보행보조도구인 흰 지팡이는 보행에 필요한 정보인 장애물의 유무를 직접 접촉해야만 인식할 수 있으며 지면의 낮은 장애물을 탐지하기 어렵다는 단점이 있다. 최근 이러한 문제들을 해결하기 위해 새로운 보행보조도구들이 개발되고 있지만 개발된 도구들의 외형과 높은 가격으로 인해 많이 사용되지 못하고 있다. 이에 본 논문에서는 적외선 센서와 압력 센서, 진동 모터를 사용하여 두 가지 유형의 보행보조신발을 제작하였다. 두 가지 유형의 보행보조신발은 장착된 적외선 센서의 개수에 따라 단일 센서 (SS)와 이중 센서 유형(DS)으로 분류하였다. 유효성 평가를 위해 장애물이 배치된 공간에서 보행 보조 신발과 흰 지팡이를 가지고 보행할 때 나타나는 보행 소요 시간과 충돌 횟수를 비교하였다. 실험 결과, 개발된 보행보조신발 사용 시 지팡이에 비해 소요시간이 증가하였으나 충돌 횟수는 감소하였다. 또한, 보행보조신발 사용 시 흰 지팡이에 비해 이동시간과 충돌횟수가 더욱 크게 감소하였다. 따라서 개발된 보행보조신발이 시각장애인의 안전한 보행 환경을 제공하고 새로운 형태의 보행보조도구에 적응하는 시간을 감소시키는데 큰 도움을 줄 수 있을 것으로 사료된다.

Keywords

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