Invention Grant
US09299052B2 Device movement detection when powered down 有权
断电时设备运动检测

Device movement detection when powered down
Abstract:
Systems and methods detect a power supply device of an apparatus being disconnected from an external AC power source and control a DC power storage element of the apparatus to supply power to a processor and directional force sensor of the apparatus. Such systems and methods record directional force measurements output by the directional force sensor and a measure of time output by a clock device of the apparatus while the processor detects that the power supply is disconnected from the external AC power source to store directions, magnitudes, and time durations of the directional force measurements in a non-transitory computer-readable storage medium of the apparatus. These systems and methods calculate and output a path of movement of the apparatus that occurred while the apparatus was disconnected from the external AC power source based on the directions, magnitudes, and time durations of the directional force measurements using the processor.
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