Piezoelectric power generation device based on excitation of fluidic micro oscillator

Abstract

The invention discloses a piezoelectric power generation device based on the excitation of a fluidic micro oscillator. The device comprises a housing, a bistable fluidic element, a first oscillation cavity, a second oscillation cavity and an output circuit, wherein the first and the second oscillation cavities are symmetrically distributed on the left side and the right side of the bistable fluidic element; diaphragm patches are respectively arranged on the first and the second oscillation cavities; piezoelectric patches are arranged on the diaphragm patches; and a gas inlet of the bistable fluidic element is communicated with a gas exhaust opening of pneumatic equipment. Due to a wall attaching effect of the bistable fluidic element, gas repeatedly circulates in the oscillation cavities on the two sides of the device to form oscillation gas, an oscillation gas flow in the oscillation cavities drives the diaphragm patches on cavity chambers to vibrate, and the vibration of the diaphragm patches drives the piezoelectric patches thereon to vibrate and deform to produce electric charge. By using the device, a waste gas energy resource can be converted into electric energy, power can be supplied to a wireless sensor, the trouble of battery replacement is saved and the energy source utilization efficiency is improved. The device has the advantages of simple structure, energy conservation and environmental friendliness, and is convenient to implement.

Description

Technical field [0001] The invention relates to a piezoelectric sheet vibration power generation device, in particular to a bistable jet micro-oscillator excited piezoelectric sheet vibration power generation device, belonging to the technical field of micro-small power generation equipment. Background technique [0002] At present, in the pneumatic industry, exhaust gas discharged from pneumatic components (cylinders, vacuum generators, etc.) is usually directly discharged into the atmosphere, causing a great waste of energy. At the same time, the power supply of wireless sensors in the industrial field is battery-powered, and the energy of the battery is limited, and frequent battery replacement is troublesome. Converting the exhaust gas energy discharged from the collected pneumatic components into the electric energy supplied by the wireless sensor can not only save the trouble of replacing the battery, but also provide energy efficiency. Summary of the invention [0003] The...

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Problems solved by technology

[0002] At present, in the pneumatic industry, the exhaust gas discharged from pneumatic components (cylinders, vacuum generators, etc.) is usually directly discharged into the atmosphere, resulting in a great waste of energy

At the same time, the power supply of wireless sensors in industrial sites is powered by batteries, and the energy of batteries is limited, so it is troublesome to replace batteries frequently

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