Self-frequency modulating piezoelectric flow energy capture device

Abstract

The invention relates to a self-frequency modulating piezoelectric flow energy capture device, and belongs to the field of river monitoring. A limiting frame is provided with a bottom plate and a limiting plate, wherein the bottom plate is arranged on the inner wall of a pipe; a spring plate is fixed on a plane segment, connected with the bottom plate, of the limiting plate; the spring plate is vertical to the central line of the pipe; a left half shell and a right half shell are arranged at a free end of the spring plate; a metal substrate is crimped between the end surfaces of the bottom walls of the left half shell and the right half shell; the metal substrate and piezoelectric wafers are spliced into a piezoelectric vibrator; a mass block is arranged at a free end of the piezoelectric vibrator; the piezoelectric vibrator is connected with a circuit board through a guide wire; left bosses are arranged on the front wall and the rear wall of the left half shell; right bosses are arranged on the front wall and the rear wall of the right half shell; the distance between two left bosses is equal to that between two right bosses and is greater than the width of each piezoelectric wafer and smaller than the width of the metal substrate; the left bosses and the right bosses are provided with arc limiting surfaces; and each limiting surface is tangent to the end surface of the bottom wall of the left half shell or the right half shell on which the limiting surface is located. The self-frequency modulating piezoelectric flow energy capture device has the characteristics and advantages that the flow rate adaptability is high, the effective band is wide, the reliability is high and the generating capacity is high.

Description

technical field [0001] The invention belongs to the technical field of river monitoring, and in particular relates to a self-frequency-regulating piezoelectric water flow energy harvester, 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 insufficient treatment of industrial waste water, soil erosion, improper use of pesticides and chemical fertilizers, etc., most rivers have been polluted to a certain extent. Nearly a quarter of the rivers or river sections cannot meet the basic requirements due to pollution. irrigation needs. 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 ...

AI Technical Summary

Problems solved by technology

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

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