Patent ID: 8436731

Claim:
A mobile personal alarm system for monitoring a hand-carried object having an X-axis, a Y-axis and a Z-axis, comprising: a MEMS gyroscope adapted to detect angular rotation of the object around at least one of the X, Y and Z-axes; a controller operable to determine a change in the angular rotation of the object around at least one of the X, Y and Z-axes based on the detection of the angular rotation by said MEMS gyroscope, said controller being operable to make multiple measurements of changes in the angular rotation of the object, each subsequent measurement being compared to a previous measurement to determine the change in the angular rotation of the object, said controller being operable in a first mode to activate said alarm after the change in angular rotation of said object has been determined, said controller being operable in a second mode to delay transmitting the signal with said alarm for a predetermined period of time, said controller being operable in a third mode to suspend determining change in angular rotation for a predetermined period of time; and an alarm adapted to transmit a signal upon the change in the angular rotation of the object as determined by said controller, said controller activating said alarm when the change determined by said controller exceeds a pre-determined threshold.