Abstract
In this study, the authors propose a method to estimate the position on an air bed by internal pressure change. The pressure of a bed varies by the position because the contact area between body and bed changes. The experimental system uses a commercially available air bed and a gauge pressure sensor. The figure shows measured pressure change according to the position. From this result, prone or supine position and lateral position are easily discriminated from the pressure difference. Furthermore, sitting position and fall from a bed were clearly detected. But prone or supine position and left or right lateral position can't be discriminated in principle.
