Bed Position Classification by a Neural Network and Bayesian Network Using Noninvasive Sensors for Fall Prevention

Figure 4

Correlation between signals and positions, where the first bold line is the signal of the piezoelectric sensor on the left, the second bold line is the signal of the piezoelectric sensor on the right, the solid line is the signal of pressure on the left, and the dashed line is the signal of pressure on the right.

(a) Off-bed

(b) Sitting

(c) Lying center

(d) Lying left

(e) Lying right