Patent ID: 9159213
Filing Date: 2015-10-13
Classification: G08B

Abstract:
1. A motion detection method, comprising the steps of: detecting accelerations ax, ay, az of an object under test along x-axis, y-axis, and z-axis, respectively, as soon as the object under test undergoes a motion at a first point in time; calculating absolute values |ax|, |ay|, |az| of the accelerations ax, ay, az, respectively, and defining the calculated absolute values |ax|, |ay|, |az| as a1, a2, a3, respectively, in a decreasing order; substituting a1, a2, a3 into an algorithm of a first signal strength and a second signal strength to calculate the first signal strength and the second signal strength; and determining that the object under test has undergone a fall motion when none of the first signal strength and the second signal strength is less than 2.5 g, wherein g denotes gravitational acceleration.