Cantilever beam negative-stiffness piezoelectric vibration energy collector
A piezoelectric vibration and cantilever beam technology, which is applied to piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of low energy harvesting efficiency and narrow operating frequency range , It is difficult to meet the use requirements and other problems
Inactive Publication Date: 2018-05-11
HUAZHONG UNIV OF SCI & TECH
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Harvesting vibration energy will have a very wide range of applications in wireless networks, embedded systems, and low-energy devices. However, traditional linear energy harvesters have a narrow operating frequency range and low energy harvesting efficiency, which is difficult to meet some occasions. Use requirements under
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0026] refer to Figure 1 ~ Figure 3 , a cantilever beam type negative stiffness piezoelectric vibration energy harvesting device, comprising a base 2, a vertical base 1, a magnet fixing base 5, a piezoelectric sheet clamping block 3, a magnet fixing block 6, a piezoelectric sheet 4 and a magnet group, of which,
[0027] Both the vertical support 1 and the magnet fixed support 5 are installed ...
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The invention belongs to the field of energy collection equipment and discloses a cantilever beam negative-stiffness piezoelectric vibration energy collector, which comprises a base, a vertical base,a magnet fixation base, a piezoelectric slice clamping block, a magnet fixation block, a piezoelectric slice and a magnet group. The magnet group comprises a magnet A and a magnet B. The magnet A andthe magnet B are arranged up and down on the magnet fixation base. The magnet A is mounted on the magnet fixation base; one end of the piezoelectric slice is fixedly arranged on the magnet A; and theother end of the piezoelectric slice is fixedly arranged on the piezoelectric slice clamping block. The magnet B is mounted on the magnet fixation block; the magnet fixation block is arranged on the magnet fixation base; and the opposite sides of the magnet A and the magnet B are opposite magnetic poles. The energy collector can obtain very high energy under a micro-vibration environment, and thusenergy harvesting efficiency is improved. By adjusting relative distance between the magnets, the energy harvesting efficiency and the range of working frequency can be adjusted.
Description
technical field [0001] The invention belongs to the field of energy harvesting equipment, and more specifically relates to a cantilever beam type negative stiffness piezoelectric vibration energy harvesting device. Background technique [0002] With the development of sensor network hardware, methods to embed the network into various aeronautical, civil and mechanical infrastructures are economically and technologically possible. But the concept of "embedded" sensing doesn't quite work in situations where the system requires cables to access traditional power sources or batteries that need to be replaced from time to time. Hence the need to harvest and store energy to make these embedded systems as automated as possible. Although solar energy and wind energy are already mature technologies for energy harvesting on a large scale, the development of energy harvesting in small-scale, low-energy, embedded sensing systems is still in the development stage. [0003] Therefore, b...
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IPC IPC(8): H02N2/18
CPCH02N2/186
Inventor 沈文爱黄之昊朱宏平袁涌胡宇航罗辉
Owner HUAZHONG UNIV OF SCI & TECH