Self-powered device for river monitoring system

Abstract

The invention relates to a self-powered device for a river monitoring system and belongs to the technical field of power generation. An end part of a shell body is provided with an end cap, an inner side of a bottom wall of the shell body is provided with a limiting magnet, an outer side is provided with four ear plates, end parts of the four ear plates are connected via crossbeams in a pairwise manner, piezoelectric vibrators and an excitation reed are mounted on a boss of the en cap, and gaskets are connected in a pressed manner between fixed ends of the excitation reed and between fixed ends of two adjacent piezoelectric vibrators; the piezoelectric vibrators are formed by bonding substrates and piezoelectric wafers, butting blocks are mounted on free ends of the piezoelectric vibrators and are butted against the excitation reed, and a free end of the excitation reed is provided with a mass block and an excited magnet; two ends of a pin shaft are respectively fixed on two parallel crossbeams which are parallel to each other; a balance spring, a blunt body and a limiting spring orderly sleeves the pin shaft from bottom to top; an excitation magnet is arranged on the blunt body. Advantages of the device disclosed in the invention are that an energy harvester is a 3 degrees of freedom system, an inherent frequency of each subsystem is easy to adjust, the energy harvester is wide in frequency band, the piezoelectric vibrators are not in contact with fluid, the piezoelectric wafers are only under compressive stress, and high reliability can be realized.

Description

technical field [0001] The invention belongs to the technical field of power generation, and in particular relates to a self-powered device for a river monitoring system, which provides energy for the river monitoring system. Background technique [0002] There are thousands of rivers all over the territory of our country. In recent years, due to insufficient treatment of industrial wastewater, soil erosion, and improper use of pesticides and fertilizers, most rivers have been polluted to a certain extent. Nearly 1 / 4 of the rivers or river sections cannot meet basic irrigation due to pollution. need. 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 coast. Therefore, river monitoring has been h...

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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