Fall detection device

Details Fall detection device Fall detection device

2008-07-08

2008-07-08

Chapman, John E (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Response to multiple sensing means or motion conditions

C360S075000

Reexamination Certificate

active

07395709

ABSTRACT:
A fall detection device is provided, which accomplishes a fall judgment on acceleration by a simple calculation and improves uniformity of effective threshold value for the acceleration judgment as to a direction of an applied acceleration vector. The fall detection device produces a fall detection signal when an absolute value of each axis component of an acceleration measured by a three-axis acceleration sensor is less than a first threshold value, and when a sum of the absolute values of the axis components of the acceleration is less than a second threshold value that is 1.5 times to twice the first threshold value.

REFERENCES:
patent: 5982573 (1999-11-01), Henze
patent: 2006/0152842 (2006-07-01), Pasolini et al.
patent: 2000-241442 (2000-09-01), None

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