TECHNICAL FIELD

The present invention relates to a posture determination apparatus.

BACKGROUND ART

Heretofore, there has been known an invention for determining the state of a user on a bed (patient). For example, the detection device disclosed in PTL 1 detects vibrations on a bed and extracts a heart beat vibration signal caused by heart beats of a biological subject. Then, the detection device presumes the posture of the biological subject on the bed based on the heart beat vibration signal extracted.

Meanwhile, the notification device disclosed in PTL 2 acquires the state of a user that includes at least one of: the posture of the user; and the position of the user on a bed or outside the bed. Then, the notification device gives notice according to the state of the user thus acquired.

CITATION LIST

Patent Literature

PTL 1: Japanese Patent Application Publication No. 2011-120667

PTL 2: Japanese Patent Application Publication No. 2016-192998

SUMMARY OF INVENTION

Technical Problem

The present invention provides a posture determination apparatus capable of determining the posture of a user appropriately from a waveform generated by vibrations of the user.

Solution to Problem

A posture determination apparatus of the present invention is characterized by including: at least two vibration sensors capable of detecting vibrations while the user is lying in bed; and a controller configured to calculate multiple waveforms from the multiple vibrations and determine the posture of the user while the user is lying in bed based on the characteristics of the multiple waveforms.

Advantageous Effects of Invention

According to the posture determination apparatus of the present invention, the posture of a user during lying in bed can be determined appropriately as one factor of the state of the user based on multiple waveforms calculated from vibrations.

