Experiments on floating wave-power generation using piezoelectric elements and pendulums in the water tank

In late years, the action for the environmental problem becomes more and more active in the world. The country like Japan, being surrounded by the sea, is rich in ocean energy. It is relatively easy to get wave energy among ocean renewable energies. The wave power generation device to collect wave energy has been studied in many countries of the world including Japan. There are a lot of electrical generating systems which use a turbine. But, the environment in ocean is different from that in land. Because the turbine is weak in ocean breeze, it is more difficult to maintain it. Therefore we proposed a new electrical generating system, which doesn´t use a turbine, using the piezoelectric element and pendulums.