the present invention relates to the field of motion / movement sensors , detectors , and / or monitors , as well as other types of sensors . in particular , the present invention may provide , for example , a large pulsed output voltage in response to very low sensed movement or environment changes , such as , temperature , pressure , and energy . the present invention relates , for example , to other available sensors and may provide an output high enough to turn on related processing circuitry from an “ off ” state . the present invention relates , among other things , to sensing various events via , for example , axially poled homopolymer polyvinyladine fluoride or other piezoelectric materials .