Piezoelectric power generation device based on the transmission of vibration energy by closed fluid

Abstract

The invention provides a piezoelectric power generator based on the transmission of vibration energy by a closed fluid. The power generator comprises an excitation end, a power generation end and a closed conduit filled with a fluid medium (liquid or gas) connecting the excitation end and the power generation end, wherein an external power supply is led in from the electrode on the excitation endto serve as excitation, a piezoelectric vibrator vibrates under the effect of the external excitation and transmits the vibration energy to the fluid medium in a closed structure, and the fluid mediumtransmits the vibration energy to the connected power generation end. The device adopts the abovementioned structure, so that the power generation vibrator accepts the kinetic energy transmitted by the fluid medium to drive a piezoelectric plate to vibrate for generating power, so that mechanical energy is converted into electric energy, and the electric energy can be led out from a power generation lead hole, and can be used for further powering the different types of loads. According to the piezoelectric power generator provided by the invention, the piezoelectric power generation mode based on the transmission of the vibration energy by the closed fluid is used, the excitation is additionally utilized to generate forced vibration via the piezoelectric vibrator, the environmental weak uncertain vibration is not used, the vibration source is stable, and the power supply is safe and reliable.

Description

technical field [0001] The invention relates to the field of power generation, in particular to a piezoelectric power generation device that transmits vibration energy based on a closed fluid. Background technique [0002] In order to adapt to special working environments such as high temperature, high pressure, high insulation, radioactivity, and high toxicity, modern equipment widely adopts airtight metal structures, and sensors and microcontrollers are often installed inside the airtight metal structures to monitor internal conditions. To ensure that these sensors and microcontrollers continue to function properly, there must be a way to power them. [0003] The traditional wired power supply method allows electric energy to be transmitted at high power, long distances, and on a large scale through transmission lines, but there are problems such as long power supply lines and many nodes, while wireless power supply technology has the advantage that power transmission is n...

AI Technical Summary

Problems solved by technology

Ultrasonic wireless power transmission technology uses piezoelectric structures to collect vibration energy in the natural environment and convert it into electric power generation. There is no electromagnetic interference problem, and it is suitable for occasions with high requirements on the electromagnetic environment. The disadvantage is that the environmental vibration is weak and unstable, and the power supply is reliable. sex is difficult to guarantee

[0005] It can be seen that although the wireless power supply method has the advantage of not being limited by space, it has disadvantages such as electromagnetic interference, power supply stability and reliability being easily affected by the environment to varying degrees.

[0006] For the power supply of sensors and microcontrollers installed inside the closed metal structure, under the condition of satisfying power (generally low power), safe and reliable power supply, anti-electromagnetic interference, high temperature resistance, high voltage, and high insulation should be preferred. The power supply method adapts to radioactive, highly toxic and other environments, and the wireless power supply method is not easy to realize

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