Apparatus and method of sensing sleeping condition of user

A method of sensing a sleeping condition of a user, the method comprising:

• measuring a physiological signal of a user who is sleeping using a physiological signal measuring module;
• determining, using at least one processing device, whether or not a predetermined motion artifact is contained in the measured physiological signal, including extracting a low-frequency component signal from the measured physiological signal, calculating the maximum value and the minimum value of the extracted low-frequency component signal within a predetermined time interval, and determining that the motion artifact is contained in the measured physiological signal within the predetermined time interval when a difference between the maximum value and the minimum value is greater than a predetermined threshold value;
• determining that the user always goes into an awake state when the predetermined motion artifact is contained in the measured physiological signal;
• and
• predicting a next awake state based on a time interval of the determined awake state during a period of sleep,
• wherein the physiological signal is an electrocardiogram (ECG).

An apparatus for sensing a sleeping condition of a body, comprising:

• a physiological signal-detecting module configured to detect a physiological signal of a body using a physiological signal measuring module;
• a physiological signal-processing module configured to detect a predetermined motion artifact that identifies movement of the body from the detected physiological signal;
• and
• a determination module configured to determine whether the body has gone into an awake state based on the predetermined motion artifact being detected in the detected physiological signal,
• wherein a next awake state is predicted based on a time interval of the determined awake state during a period of sleep, and
• wherein the physiological signal is an electrocardiogram (ECG).