A Piezoelectric Energy Harvester Used in River Monitoring System

Abstract

The invention relates to a piezoelectric energy harvester used in a river monitoring system, belonging to the technical field of new energy. There are sub-beams at both ends of the main beam of the frame, and a cavity is provided on the outside of the sub-beam; the side beams of the side frame and the middle beam of the middle frame are installed on the side wall of the cavity close to the sub-beam, and are bonded by the base plate and the piezoelectric sheet. One end of the piezoelectric vibrator is crimped between the side beam and the middle beam, and the other end is equipped with a secondary magnet; one side of the side ear plates at both ends of the side beam and both sides of the middle ear plate at both ends of the middle beam are equipped with a shape-limiting On the surface, the distance between the side ear plates is equal to the distance between the middle ear plates and is wider than the piezoelectric sheet and narrower than the base plate; the side ears at both ends of the blunt body of the coupler are connected by a horizontal plate, and the horizontal plate is equipped with a leaf spring, and the other end of the leaf spring is fixed on the main beam Above; the outer sides of both ends of the blunt body are equipped with side arms embedded with main magnets, and the main magnets are symmetrically installed on the two side arms to form the same angle with the axis of the blunt body, and the main and auxiliary magnets attract each other; two baffles are installed on the sub-beam and its curved plates lean against each other, and the convex surface of the curved plates is close to the blunt body.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a piezoelectric energy harvester used in a river monitoring system, which is used to construct a self-powered river monitoring system. Background technique [0002] There are thousands of rivers all over the territory of our country. In recent years, due to inadequate treatment of industrial wastewater, soil erosion, and improper use of pesticides and fertilizers, some rivers have been polluted to a certain extent, unable to meet the needs of residents and farmland irrigation. In addition, due to the imperfect flood control facilities and lack of relevant flood control facilities for small and medium-sized rivers in some areas, there are dangers of embankment collapse or flooding when the flood season approaches, which directly threatens the lives and property safety of people along the coast. Therefore, river monitoring has been highly valued by relevant state de...

AI Technical Summary

Problems solved by technology

In recent years, due to insufficient treatment of industrial wastewater, soil erosion, and improper use of pesticides and fertilizers, some rivers have been polluted to a certain extent, unable to meet the needs of residents' lives and farmland irrigation.

In addition, due to the imperfect flood control facilities and lack of relevant flood control facilities for small and medium-sized rivers in some areas, there are dangers of embankment collapse or flooding when the flood season approaches, which directly threatens the lives and property safety of people along the coast.

Therefore, river monitoring has been highly valued by relevant state departments; at the same time, domestic experts and scholars have also proposed corresponding monitoring methods and means, including water quality monitoring technology for river water pollution, rainfall, water level and other natural disasters for flood control and mudslides. There are many monitoring technologies such as river water flow rate, as well as various micro energy harvesters that supply power to the monitoring system. However, the existing micro energy harvesters have certain problems in terms of reliability and flow rate adaptability, which seriously hampered its promotion

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