munition impacts the target ground or another object the munition 39 s deceleration profile can be measured from the piezoelectric element output voltage during the impact period and peak deceleration level impact duration impact force and total impulse can then be calculated as previously described using the processor 208 this information can then be used to determine if a relatively hard or soft target has been hit noting that the softer the impacted target the longer would be the duration of impact peak impact deceleration force the opposite will be true for harder impacted targets this information is very important since it can be used by the fuzing system to make a decision as to the most effective settings it is worth noting at this point that the hard or soft target detection and decision making in fact all the aforementioned detection and decision making processes are expected to be made nearly instantly by the power source electrical energy collection and regulation electronics or the fuzing electronics by employing for example threshold detecting switches to set appropriate flags once a munition has landed and is not detonated whether due to faulty fuzing or other components or properly made decision against detonation the piezoelectric based power generation unit 100 will stop generating electrical energy once its initial vibratory motion at the time of impact has died out the electrical power harvesting electronics and or the fuzing electronics can utilize this event if followed by target impact to initiate detonation time out circuitry for example the power source and or fuzing electronics can be equipped with a time out circuit that would disable.