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웨어러블 기기를 이용한 실시간 상황인식에서의 잡음제거

Noise Reduction in Real-time Context Aware using Wearable Device

  • 김태호 (충북대학교 전기전자정보컴퓨터학부 데이터베이스/바이오인포매틱스연구실) ;
  • 서동혁 (단국대학교 디스플레이공학과) ;
  • 윤신숙 (남서울대학교 전자공학과) ;
  • 류근호 (충북대학교 전기전자정보컴퓨터학부 데이터베이스/바이오인포매틱스연구실)
  • Kim, Tae Ho (Database/Bioinformatics Lab, School of Electrical & Computer Engineering, Chungbuk National University) ;
  • Suh, Dong Hyeok (Department of Display Engineering, Dankook University) ;
  • Yoon, Shin Sook (Department of Electronic, Namseoul University) ;
  • Ryu, Keun Ho (Database/Bioinformatics Lab, School of Electrical & Computer Engineering, Chungbuk National University)
  • 투고 : 2018.09.06
  • 심사 : 2018.09.27
  • 발행 : 2018.09.30

초록

사물인터넷 기술을 활용하는 연구가 활발하게 진행되고 있다. 사물인터넷을 활용하는 스마트 웨어러블 기기의 상황인식 기능을 향상시키기 위하여 센서부의 이벤트 데이터에 대한 잡음 제거방안을 제안하였다. 본 연구에서는 저역필터를 이용함으로써 비정상적으로 측정된 값에 대한 감쇠를 유도하고 센서의 이벤트 데이터를 이용한 상황 인지에서 유익을 얻을 수 있었다. 스마트 폰과 스마트워치에 기본 내장되어 있는 3축 가속도 센서가 감지하여 보고한 이벤트 데이터를 활용하여 검증한 결과 비정상적으로 과도하게 측정되어 입수된 잡음 값에 대한 값에 대한 감쇠처리를 실행할 수 있었다. 이와 같이 잡음이 제거된 값의 패턴을 분석함으로서 실시간 상황인식에 필요한 다양한 패턴 자료를 얻을 수 있었다.

Recently, many researches related to IoT (Internet of Things) have been actively conducted. In order to improve the context aware function of smart wearable devices using the IoT, we proposed a noise reduction method for the event data of the sensor part. In thisstudy, the adoption of the low - pass filter induces the attenuation of the abnormally measured value, and the benefit was obtained from the situation recognition using the event data of the sensor. As a result, we have validated attenuation for abnormal or excessive noise using event data detected and reported by 3-axis acceleration sensors on some devices, such as smartphones and smart watches. In addition, various pattern data necessary for real - time context aware were obtained through noise pattern analysis.

키워드

참고문헌

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