PROBLEM TO BE SOLVED: To provide a sleep state determining device capable of determining the sleep state of a person with high accuracy in spite of no restraints.SOLUTION: The sleep state determining device includes body motion amount computing means for computing the time-series waveform data of the amount of body motion based on data obtained by detecting the body motion of a subject 5 during sleep by a video camera 2 body motion extracting means for extracting large body motion continuously made for a predetermined time or longer from the computed time-series waveform data of the body motion, and eliminating body motion in a body motion restrained section where the large body motion is restrained and determining means for computing the stillness duration (t) of the large body motion every body motion restrained section to extract the time intervals of the large body motion, and determining which of multiple stages of sleep depth the sleep state of the subject is classified in, based on the time intervals of the large body motion and the body motion amount of the large body motion.COPYRIGHT: (C)2012,JPO&INPIT【課題】人の睡眠状態を無拘束ながらも高精度で判定することができる睡眠状態判定装置を提供する。【解決手段】ビデオカメラ2により、被験者5の睡眠時の体動を検出して得られるデータに基づき、体動量の時系列波形データを算出する体動量算出手段と、算出した前記体動量の時系列波形データから、継続して所定時間以上行われる大きな体動を抽出するとともに、この大きな体動が抑制されている体動抑制区間の体動を除去する体動抽出手段と、前記体動抑制区間ごとに前記大きな体動の静止持続時間tを算出して前記大きな体動の時間間隔を抽出し、前記大きな体動の時間間隔および前記大きな体動の体動量に基づいて、被験者の睡眠状態が複数段階の睡眠深度のいずれかに分類されるのかを判定する判定手段とを備える。【選択図】図1
