수면 효율 연구에서 수면 사이클 또는 수면 단계에 대한 분석은 필수적이다. 본 논문은 라즈베리 파이를 기반으로 한 복합 센서를 통해 수면 모니터링을 할 수 있는 시스템을 제안한다. 생체 데이터, 움직임 데이터 및 수면환경 데이터를 통합적으로 분석하여 NREM/REM/WAKE 세 가지의 수면 단계로 분류할 수 있도록 했다. 비접촉식 센서 UWB와 두 손가락에만 부착하는 GSR 센서를 이용하여 피험자가 수면에 방해를 받지 않고 검사를 진행할 수 있다. 또한, 시간과 장소와 관계없이 진행할 수 있는 수면 모니터링 시스템이기 때문에, 피험자의 평소 수면 환경과 같은 조건에서 검사를 진행할 수 있었다.
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