Traditional energy sources are becoming increasingly depleted and environmental pollution problems are worsening. The development of new energy sources is urgent. With the development of low-power wireless sensors, the use of environmentally friendly renewable energy, such as solar power, wind power and wave power, to generate micropower supplies for powering sensor nodes, has attracted increasing attention from all walks of life. Compared with wind power and solar power technology, wave power generation technology has lagged behind for more than ten years. However, wave energy has unique advantages: the energy density of wave energy is high, 4 to 30 times that of wind energy. Compared to solar energy, wave energy is not affected by weather conditions. The foodion in wave energy is an electrical supply made from wave energy. It has many advantages for powering ocean detection nodes:
1. Wave energy is widely distributed and has huge reserves, and the energy can be obtained locally;
2. Wave power generation devices are less affected by marine conditions and climate. It is very important to study the use of wave energy to generate electricity and provide long-term energy to ocean wireless sensor nodes.
The interaction between the wind and the sea surface produces waves. Wave energy is one of the energy resources of water expressed as kinetic energy. In 1977, someone calculated waves with an average height of 1 meter and a period of 1 second in the world's oceans and estimated that the global power of wave energyages was about 70 billion kilowatts, of which about 2.5 billion kilowatts could be harnessed, which is similar to tidal power. There is so much energy in waves, such as converting the kinetic energy of waves into electrical energy, so that the stormy waves that cause disasters can serve humanity, which is an ideal that people have dreamed of since many years.
Sea water is affected by the sea wind and influences such as changes in atmospheric pressure cause it to leave its original equilibrium position and move towards top, bottom, front and back. This creates waves in the sea. A wave is a regular, periodic wave motion. As the waves move up to the shore, as the depth of the sea water becomes shallower and shallower, the up and down movement of the lower water is hindered. Under the action of the inertia of the object,the waves of sea water accumulate one after another. another, and the waves break more and more, and one wave is higher than the other. A wave. At the same time, as the water depth decreases, the resistance to movement of the lower water layer becomes greater and greater, so ultimately its movement speed is slower that the speed of movement of the upper layer due to. under the action of inertia, the highest point of the wave falls forward, falls on the beach, and becomes splashing waves.
The undulating sea is in motion without stopping. Over 1 square kilometer of sea surface, wave movement generates 200,000 kilowatts of energy per second. Therefore, wave energy is also a kind of ocean energy.