The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Walking Assistance Device for Prevention of Accidents of Visually Impaired People

시각장애인의 사고예방을 위한 다기능 보행 보조 장치

  • 심재만 (남서울대학교 전자공학과) ;
  • 이형욱 (남서울대학교 전자공학과) ;
  • 신주용 (남서울대학교 전자공학과) ;
  • 김기원 (남서울대학교 전자공학과) ;
  • 한영오 (남서울대학교 전자공학과)
  • Received : 2019.09.30
  • Accepted : 2019.12.15
  • Published : 2019.12.31
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Abstract

In this paper, an auxiliary device was implemented to help blind people more safely from obstacles or risk factors while walking. The ultrasonic sensors detect obstacles in the front, so that the noise gap and the vibration intensity of the buzzer can be heard differently by distance and angle, and so the situation can be perceived by pedestrians. When the ambient light becomes darker than the light intensity set using the CdS resistance value of the light sensor, the LED automatically turns on, makes it easier for pedestrians to recognize the position of the auxiliary device through buzzer if the pedestrian misses the aid using the gyro sensor's slope. Moreover, the location and situation of the blind were transmitted to the caregiver to check safety and behavior using GPS and Bluetooth.

본 논문에서는 시각장애인들이 보행 시 장애물이나 위험요소로부터 보다 안전하게 보행 할 수 있도록 보조장치를 구현하였다. 초음파 센서를 통해 전방에 있는 장애물을 감지하여 거리별, 각도별로 부저의 소리의 간격과 진동의 세기를 다르게 울리도록 했으며 그에 따라 보행자가 상황을 인지할 수 있게 설계하였다. 조도 센서의 CdS 저항값을 이용해 설정해놓은 빛의 밝기보다 주변이 어두워 졌을 시 LED가 자동 점등 되어 주변 보행자들이 시각장애인을 쉽게 인식할 수 있게 하였으며, 또한 자이로 센서의 기울기를 이용해 보행자가 보조 장치를 놓쳤을 시 부저를 통하여 보조 장치의 위치를 인식할 수 있게 하였다. 그리고 GPS와 블루투스를 이용하여 시각장애인의 위치 및 상황을 보호자에게 전송하여 안전보행을 확인할 수 있게 구현하였다.

Keywords

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