Piezoelectric generating apparatus

H - Electricity – 02 – N

Patent

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H02N 2/18 (2006.01) H01L 41/113 (2006.01)

Patent

CA 2391142

A structure comprises a piezoelectric ceramics plate (1) formed by two plate- shaped piezoelectric ceramics elements (1a, 1b) which are layered and joined to each other with inverse polarization, in which electricity is generated by beating one or both surface of the piezoelectric ceramics plate with a hard beater (4) thereby exciting flexural vibration in the piezoelectric plate. The structure preferably is supported by a cushion member (3, 11) and carries a protector plate (2). Therefore, an excellent generating efficiency is obtained.

Une structure comporte une plaque céramique piézo-électrique (1) formée par deux éléments céramiques piézo-électriques (1a, 1b) en forme de plaque qui sont disposés en couche et assemblés l'un à l'autre avec une polarisation inverse. On génère de l'électricité dans cette structure en frappant l'une des surfaces, ou les deux surfaces, de la plaque céramique piézo-électrique avec un dispositif dur (4) conçu pour frapper la plaque de manière à engendrer une vibration de flexion dans la plaque piézo-électrique. Cette structure est de préférence supporté par un élément coussin (3, 11) et porte une plaque de protection (2). On obtient ainsi un excellent rendement de génération électrique.

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