Activity Sensing Using Piezoelectric Sensors for Ultra Low Power Operation of Devices with Significant Inactivity Time

摘要

A system and method for reducing power consumption in an inactive device. Based upon inputs received from one or more sensors, a processor in a device determines that the device has not moved or has been inactive for a predetermined period. One or more components of the device are placed in an inactive state or in a sleep mode when the device has been inactive for the predetermined period. The inactive state or sleep mode requires less power consumption by the components than an active mode of operation. A piezoelectric sensor in the device is used to detect movement. The piezoelectric sensor provides an input signal to the processor upon detecting movement of the device. The one or more components are placed in the active mode in response to the input signal.