SLEEP SUPPORT APPARATUS

摘要

A sleep support apparatus includes a pair of electrocardiographic electrodes that detect an electrocardiographic signal, a photoelectric pulse wave sensor that includes a light emitter and a light receiver and that detects a photoelectric pulse wave signal, peak detectors that respectively detect the peaks of the electrocardiographic signal and the photoelectric pulse wave signal, a pulse wave transit time clock that obtains a pulse wave transit time from a time difference between the peak of the photoelectric pulse wave signal and the peak of the electrocardiographic signal, a sleep state detector that determines that a user's body has not reached a state suitable for sleep when the pulse wave transit time is less than or equal to a certain threshold, and a forearm heater that increases a temperature of a forearm when it is determined the user's body has not reached a state suitable for sleep.

主权项

1. A sleep support apparatus comprising:
a pair of electrocardiographic electrodes that detect an electrocardiographic signal; a pulse wave sensor that detects a pulse wave signal; a peak detector that detects a peak of the electrocardiographic signal, detected by the pair of electrocardiographic electrodes, and of the pulse wave signal, detected by the pulse wave sensor; a pulse wave transit time computer that obtains a pulse wave transit time from a time difference between the peak of the pulse wave signal and the peak of the electrocardiographic signal, the peaks being detected by the peak detector; and a detector that determines that a user's body has not reached a state suitable for sleep when the pulse wave transit time obtained by the pulse wave transit time computer is less than or equal to a threshold value.