| 摘要 |
PROBLEM TO BE SOLVED: To provide a power generation unit capable of efficiency generating electric power in a vibration source which frequency of vibration is relatively low.SOLUTION: Vibration of a vibration source SV makes an excitation device 70 to resonate, and a mass member 71 periodically collides to a holding member 60 of an electric power generation element 10. Free vibration is generated in the electric power generation element 10, and the electric power is efficiency generated. That is, resonate frequency of the electric power generation element 10 is set to a value higher than the resonate frequency of the excitation device 70, and therefore, the electric power can be generated in a state where an electric power generation voltage of the electric power generation element 10 is ensured. Thus, the vibration source SV of which the vibration is generated in relatively low frequency can efficiency generate the electric power. |
