Analysis of the Transformation of Mechanical Impact Energy to Electric Energy Using Piezoelectric Vibrator Umeda, Mikio ; Nakamura, Kentaro ; Ueha, Sadayuki Abstract Publication: Japanese Journal of Applied Physics Pub Date: May 1996 DOI: 10.1143/JJAP.35.3267 Bibcode: 1996JaJAP..35.3267U