| 摘要 |
The present invention provides a non-power source type monitor device installed in a place where a non-power source system needs to be used or a place preferably suitable for the non-power source system, in which a quantity generated energy not lower than several ten times as much as an output of electric current obtained by usual piezoelectric power generating device using steel balls can be assuredly obtained by striking a piezoelectric ceramics element once. A piezoelectric power generating device is formed commonly with capable of automatically repeatedly striking the piezoelectric ceramics element so that a quantity of generated energy of a practical level can be assuredly ensured as a power source of such type monitor device.
|
