Low power false positive tolerant event detector for seismic sensors

Abstract

A 12nW sub-threshold event detector with false positive detection has been designed to operate in conjunction with a classifier for an unattended seismic surveillance sensor. 45nW consumed in presence of events. Power is greatly conserved by using the event detector (which never sleeps) to wake up a power consuming microcontroller which performs the classification of the event. The low power seismic sensor has an added circuit to suppress false positives. The proposed work helps alleviate maintenance costs and increases the life time of the sensors. Such ideas can be implemented in other devices where battery life is of crucial importance.