A small-sized piezoelectric power generation device is provided which can generate electric power even with vibrations at low frequencies. The mold structure includes a core mold portion and a cavity mold portion mating with the core mold portion. Each sensor is defined as an active or an inactive sensor based upon the application requirement. The electronic controller is programmed to apply a first set of voltages to the electrodes to constrain a motion of ions propagating along the axis in a radial direction relative to the axis, and apply a second set of voltages to the electrodes to accelerate the ions out of the pulsing region through the one or more apertures.