Patent ID: 8676532

Claim:
A fall detection device configured to detect a fall on the basis of a signal outputted from an acceleration sensor, the fall detection device comprising: acceleration detection means that detects accelerations in three orthogonal axis directions; and fall start determination means that determines a steady time and accelerations in the three axis directions at the steady time by performing monitoring of an acceleration detected by the acceleration detection means, obtains an evaluation value with respect to the accelerations in the three axis directions detected by the acceleration detection means on the basis of an evaluation function, by which an evaluation value is increased as a difference increases between the acceleration at the determined steady time and an acceleration at a fall determination time in each of the three axis directions, and determines the start of a fall on the basis of whether the evaluation value exceeds a first predetermined threshold, wherein the steady time is a time just before a time when the absolute value of a differential value of an acceleration detected by the acceleration detection means exceeds a second predetermined threshold, and the fall determination time is a time just after a time when the absolute value of a differential value of an acceleration detected by the acceleration detection means falls below a third predetermined threshold.