Abstract
The sleep is essential for maintaining the human health. Sometimes, sleep problems are caused of the drop of the work, the decrease of work efficiency, and drowsy driving with the diversification of the lifestyle. Therefore, it is necessary to focus on a sleep monitoring. In the case of monitoring sleep, PSG measurement is common as a measurement method of the sleep depth. However, this method has to attach many electrodes to subjects. So subjects feel constrained and it would be cause of heavy stress. Therefore, it is necessary to develop a new method that can measure the sleep state under the unconstraint and noncontact condition. In this study, we performed the sleep measurement experiments by the PSG measurement and electric wave sensor. The electric wave sensor could measure the body movement, the respiratory frequency and the respiratory amplitude. Finally we inspected whether we could estimate the sleep depths. The average of the body movement became small during the awakening degree decreases. The average of the respiratory frequency did not have a big difference in each sleep stage. The average of the respiratory amplitude became small as well as body movement.
