An array piezoelectric-electromagnetic energy harvester based on fluid excitation

Abstract

The invention discloses an array type piezoelectric-electromagnetic energy harvester based on fluid excitation, which is used as a power generation device for directly collecting water energy; it consists of a casing, a piezoelectric vibrator, a rectangular magnet, a circular magnet, an electromagnetic coil, and a casing Composed of end cover, connecting rod, driving fan and fixed base plate; using water flow to drive the fan to drive it to rotate, thereby driving the base to rotate, the circle on the bottom surface of the stepped shaft is inscribed with the circle on the bottom surface of the base to form a crank linkage mechanism with the connecting rod When the circular magnet moves as a piston in the casing, the circular magnet will cut the magnetic induction line with the electromagnetic coil in the casing to generate electromagnetic power; when the circular magnet is close to the rectangular magnet, it will produce magnetic coupling to deform the piezoelectric vibrator. Charges are generated on its surface; piezoelectric-electromagnetic power generation mode is achieved; piezoelectric power generation and electromagnetic power generation are carried out simultaneously, and the voltage generated by energy capture can reach the maximum in a short time.

Description

technical field [0001] An array type piezoelectric-electromagnetic energy harvester based on fluid excitation, in particular to a piezoelectric energy harvester capable of collecting water energy, and belongs to the technical field of fluid flow-induced vibration energy harvesting. Background technique [0002] The Yangtze River is the largest river in my country. In history, there have been many catastrophic floods in the Yangtze River area. In recent years, the ecology has been severely damaged, blindly reclaiming land from lakes, and unreasonable water conservancy construction have negative ecological effects on rivers that cannot be ignored. In addition, because the current flood control facilities for small and medium-sized rivers in many areas are not perfect, or even do not have any flood control facilities, when the flood season comes, it may cause dangers such as embankment failure or flooding, directly threatening the lives and property safety of people along the c...

AI Technical Summary

Problems solved by technology

Although some of the monitoring methods proposed at present are relatively mature in technology, they have not been popularized and applied in a large area. One of the main reasons is that the power supply problem of the monitoring system has not been well resolved.

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