| 摘要 |
PURPOSE: An accidental falling sensing device which is worn on a wrist, method thereof, and system thereof are provided to accurately sense falling by classifying accidental falling from a normal operation. CONSTITUTION: An accidental falling sensing system includes an accidental falling sensing device(100), an emergent call gateway, and an institution which copes with an emergent situation. The accidental falling sensing device is worn on a wrist. The accidental falling sensing device includes an acceleration sensor(110), a determination module(120), and a wireless communication module(130). The acceleration sensor senses acceleration information and slope information. The determination module includes a preprocessing unit, a norm calculating unit, an NHC(Norm Hit Crossing Count) calculating unit, and a determination unit. |
