Patent ID: 8072122

Claim:
A self-powered impulse detecting system comprising: a signal transmitter; an energy storage component electrically communicating with the signal transmitter; and an energy harvester comprising: a top plate having a top surface and a bottom surface, the top plate configured to receive a stress impulse by an external object on its top surface; a bottom plate positioned opposite to the top plate and leaving room in between the bottom plate and the top plate; an elastic element positioned in between the top plate and the bottom plate, the elastic element is configured to reduce overall damping of the energy harvester; a bendable substrate attached at a first end to the bottom surface of the top plate, the bendable substrate is configured to bend freely; a piezoelectric element positioned on the bendable substrate; a deadweight cooperating with the bendable substrate; and a stopper positioned at a second end of the bendable substrate, the stopper configured to cause the bendable substrate to collide with the stopper when the bendable substrate bends towards the stopper; wherein collisions between the bendable substrate, the top plate and the stopper cause the bendable substrate to bend along with the piezoelectric element to generate electricity, such that the electricity generated by the energy harvester powers the signal transmitter through the energy storage component to transmit a signal.