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Piezoelectric beam and capacitor combined type bidirectional energy collection device with bistable feature

A bistable, piezoelectric beam technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of collecting multi-directional and multi-form vibrations at the same time Problems such as energy collection, low energy conversion rate, and narrow frequency range of energy collection, etc., to achieve the effect of novel structure, improved energy conversion rate, and small size

Active Publication Date: 2017-07-21
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a piezoelectric beam and capacitor composite bidirectional energy collector with bistable characteristics to solve the problems existing in current MEMS energy harvesters that it is difficult to collect multi-directional and multi-form vibration energy at the same time, and the energy The problem of narrow collection frequency domain and low energy conversion rate is to collect the energy of acoustic vibration and solid vibration at the same time, broaden the frequency domain of energy collection, and improve the efficiency of energy conversion

Method used

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  • Piezoelectric beam and capacitor combined type bidirectional energy collection device with bistable feature
  • Piezoelectric beam and capacitor combined type bidirectional energy collection device with bistable feature
  • Piezoelectric beam and capacitor combined type bidirectional energy collection device with bistable feature

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Embodiment Construction

[0024] Such as figure 1 As shown, the outer end of the piezoelectric energy collection unit 1 is fixedly connected to the substrate 6, the outer end of the piezoelectric energy collection unit 2 is fixedly connected to the substrate 6, and the piezoelectric energy collection unit 1 and the piezoelectric energy collection unit 2 are fixedly connected. The inner ends of the two are connected to the current collecting device 5, the current collecting device 5 is not in contact with the substrate 6, and is in a floating state, and the electrostatic energy collection unit 1 3 and the electrostatic energy collection unit 2 4 are symmetrically fixed on both sides of the substrate 6 respectively.

[0025] Such as figure 2 As shown, the structure of the piezoelectric energy harvesting unit 1 and the piezoelectric energy harvesting unit 2 is exactly the same, wherein the middle of the bistable beam 101 is fixedly connected with a mass 102, and the outer end of the bistable beam 101 is ...

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Abstract

The invention relates to a piezoelectric beam and capacitor combined type bidirectional energy collection device with a bistable feature and belongs to the field of micro electromechanical systems and energy technology. An outer end of a piezoelectric energy acquisition unit 1 is fixedly connected with a base body. An outer end of a piezoelectric energy acquisition unit 2 is fixedly connected with the base body. The inner end of the piezoelectric energy acquisition unit 1 and the inner end of the piezoelectric energy acquisition unit 2 are connected with an electricity collection device which is not in contact with the base body and in a floating state. A static electricity energy acquisition unit 1 and a static electricity energy acquisition unit 2 are symmetrically fixed on two sides of the base body. The energy collection device is advantaged by novel structure, quite small size and capability of achieving a superposition and amplification effect on output energy. Each piezoelectric energy acquisition unit consists of a bistable state beam, an electricity collection device and a bistable state beam series connection structure, so frequency domain of acquisition energy is extended. An electret thin film is connected with the base body through spandex filaments with high elasticity, so energy conversion area of the electret thin film can be increased and energy conversion rate is improved.

Description

technical field [0001] The invention relates to the technical fields of micro-electromechanical systems and energy sources, in particular to a piezoelectric beam-capacitance composite bidirectional energy collector with bistable characteristics. Background technique [0002] MEMS is one of the important research fields in the 21st century, and it is widely used in various fields such as biology, medical treatment, military affairs, and communication. At present, the problem of short power supply life in energy technology needs to be solved urgently. Compared with traditional chemical batteries, microelectronic devices overcome the problems of large volume, short life, and easy pollution of the environment. At the same time, it has the characteristics of low energy consumption. Spontaneous power supply using ambient vibration offers the possibility. [0003] There are three forms of energy conversion using environmental vibration to generate electricity: electromagnetic, ele...

Claims

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Application Information

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IPC IPC(8): H02N2/18
CPCH02N2/186
Inventor 王东方刘畅杨旭傅宇鹏
Owner JILIN UNIV
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