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Collision type piezoelectric vibration energy collection device

An energy harvesting, piezoelectric vibration technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, piezoelectric/electrostrictive/magnetostrictive device, etc., can solve the tuning method Difficult to efficiently collect impact energy, unstable vibration structure, etc.

Active Publication Date: 2012-12-05
TSINGHUA UNIV
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Problems solved by technology

In addition, for working environments with high impact energy, a single tuning method is difficult to efficiently collect impact energy and may lead to instability of the vibrating structure

Method used

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  • Collision type piezoelectric vibration energy collection device
  • Collision type piezoelectric vibration energy collection device
  • Collision type piezoelectric vibration energy collection device

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Embodiment Construction

[0015] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following descriptions are only examples and not intended to limit the scope of the invention and its application.

[0016] figure 2 The arrangement of a preferred embodiment of the invention is shown. figure 2 Among them, the supporting substrate 2 and the piezoelectric layer 1 are fixed on the vibrating block 4 through the spacer 3, and the contact structure 5 is a block structure fixed on the middle part of the upper and lower bottom surfaces of the vibrating block 4. The vibrating block 4 and the contact structure 5 are not fixedly connected. The mode is closed in the device, and the shell of the device is the fixed block 6. Such as figure 2 As shown in , the vibration direction of the vibration block is consistent with the vibration direction of the external vibration source, and the collision occurs between the block str...

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Abstract

The invention relates to a collision type piezoelectric vibration energy collection device which belongs to the technical field of piezoelectric material energy conversion and collection devices. The device comprises a supporting substrate (2), a gasket (3), a vibration block (4), a fixing block (6), and the like, wherein the supporting substrate (2) is fixed on the gasket (3); the gasket (3) is fixed on the vibration block (4); the vibration block (4) generates relative motions with the fixing block under the action of environmental vibrations or impacts and collides with the fixing block (6), and after colliding, the supporting substrate drives a piezoelectric layer to vibrate with the natural vibration frequency of the supporting substrate; the supporting substrate is made of a piezoelectric material or the piezoelectric layer (1) is fixed on the supporting substrate; and a mass block (7) is arranged on the supporting substrate. The device can effectively collect low-frequency and high-intensity impact energy, thereby solving the problems of difficult matching, low energy conversion efficiency, and the like of environmental natural vibration frequency and vibration structure resonance frequency. The device is suitable for low-frequency, high impact energy and non-continuous vibration environment and can be applied to sensors or other low power consumption systems for power supplying.

Description

technical field [0001] The invention relates to a collision-type piezoelectric vibration energy collection device, which is a collision-type piezoelectric vibration energy collection device suitable for low-frequency, high-impact energy, and discontinuous vibration environments, and belongs to the technical field of piezoelectric material energy conversion and collection devices . Background technique [0002] Sensors are widely used in various fields of production and life, such as mechanical instrument detection, building environment monitoring, wireless communication networks, next-generation portable multimedia equipment, implanted medical devices, etc., and gradually present the characteristics of miniaturization, integration, and embeddedness. In some application environments, due to the inconvenience of replacement or the limitation of space and quantity, the general battery power supply / charging method cannot be used, making energy supply a prominent bottleneck in se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/00H02N2/18
Inventor 伍晓明杨轶卜灵林建辉刘理天任天令
Owner TSINGHUA UNIV
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