| 摘要 |
PROBLEM TO BE SOLVED: To restrict damage caused by an increased amplitude of vibration at the time of strong wind without damaging a power generating performance at a normal wind speed region and to enable a stable efficient power generation to be attained by wind in a wide range of wind speed at a wind power generator for generating power through flexure deformation of a piezoelectric element accompanied by vibration of a power generating unit through wind.SOLUTION: A lower end part of a power generating unit 14 is connected to a slide fitting part 30 of a tension adjustment mechanism 20, the slide fitting part 30 is moved from the first position (ascending end) to the second position (descending end) by a lift force of a blade part 38 at the time of strong wind as the wind speed is increased, and the tensile strength of the power generating unit 14 is increased, so that the damage of the power generating unit 14 is restricted as the amplitude of vibration of the power generating unit 14 becomes excessive high at the time of strong wind. At another case except for the strong wind, the slide fitting part 30 is held at the first position and the tensile strength of the power generating unit 14 is low and it can be vibrated at a large amplitude, so that an efficient power generation can be carried out through a flexure deformation of the piezoelectric film.SELECTED DRAWING: Figure 2 |
