A Fluid Vibration Energy Harvesting Device Based on Piezoelectric Material

Abstract

The invention discloses a piezoelectric material based fluid vibration energy collection apparatus. The fluid vibration energy collection apparatus comprises a first container and a second container, wherein the first container and the second container are cuboids or cylinders; the second container is sleeved by the first container; multiple transduction circuits arranged on a PCB are arranged between the first container and the second container; the upper and lower end planes between the first container and a second container are sealed; multiple sockets are formed in the inner side of the second container; one ends of piezoelectric transduction sheets are fixed in the sockets while the other ends of the piezoelectric transduction sheets extend to the center of the second container; the piezoelectric transduction sheets comprise piezoelectric ceramics and substrates; the piezoelectric ceramics are connected with the positive ends of the corresponding transduction circuits through wire-outlet circuits; the substrates are connected with the negative ends of the corresponding transduction circuits through the wire-outlet circuits; the number of the transduction circuits is equal to that of the piezoelectric transduction sheets, and the transduction circuits are in one-to-one correspondence connection with the piezoelectric transduction sheets. According to the apparatus, the broadband is realized and the energy collection effect is improved due to different lengths, shape structures and position relations of the piezoelectric transduction sheets.

Description

technical field [0001] The invention belongs to the field of vibration energy collection, and in particular relates to a fluid vibration energy collection device based on piezoelectric materials. Background technique [0002] The phenomenon that piezoelectric materials can generate electric charges under the action of external force has been discovered for decades, but limited by the ability of piezoelectric materials to generate electricity, this part of the electric charge is collected and stored as a power source for driving micro-power appliances. There has been very little. In recent years, the use of highly integrated low-power electronic components and radio frequency technology has provided a prerequisite for the application of piezoelectric energy harvesting technology. In addition, the power consumption of sensors, microprocessors and radio frequency devices has been continuously reduced, and the energy budget of the system has gradually become balanced. Micro-env...

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Problems solved by technology

In 2011, Ma Huaan of Shanghai Jiaotong University and others designed a piezoelectric vibration energy emission and acquisition device based on environmental energy acquisition, which can broaden the 5Hz working frequency band, but still adopts the form of a cantilever beam. When the direction of environmental vibration is different from the vibration direction of the cantilever arm, Dramatically reduced deformation and limited range of use

[0009] The working principle of the piezoelectric device is to use the piezoelectric material to generate an electric field when it is deformed by external mechanical action to form an internal stress; in the prior art, there is a problem of single vibration frequency in the field of vibration energy collection of piezoelectric transducers , which leads to poor output power effect of the piezoelectric transducer when the vibration frequency in the environment is not easy to reach the natural frequency

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