Unobtrusive Support System for Prevention of Dangerous Health Conditions in Wheelchair Users

Figure 2

PRT detection algorithm. (a), (b), and tilt angle obtained with the accelerometer (c) allow capturing daily pressure relieving patterns. Vertical lines marked with “X” and “O” indicate the PRT detected. Arrows on the FSR sensors mark the beginning and end of the wheelchair occupancy.

(a)

(b)

(c)