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Self-adaptive wide-band fluid energy harvesting device

An energy harvester and self-adaptive technology, applied in the direction of current collectors, piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, etc., can solve the problem of narrow frequency locking range and limited fluid flow energy collection efficiency , low output power and other issues, to achieve the effect of realizing broadband energy harvesting, improving environmental adaptability, and increasing flexibility

Active Publication Date: 2017-09-05
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, previous studies have found that when using vortex-induced vibration energy harvesting, the output power is low and the frequency locking range is narrow, which limits the efficiency of fluid flow energy harvesting to some extent.

Method used

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  • Self-adaptive wide-band fluid energy harvesting device
  • Self-adaptive wide-band fluid energy harvesting device
  • Self-adaptive wide-band fluid energy harvesting device

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] The structure diagram of the self-adaptive broadband fluid energy harvester provided by the present invention is as follows: figure 1 As shown, the energy harvester includes a base 10, a support rod 6, an energy harvesting mechanism, a wind vane 9 and a rectification storage circuit.

[0027] The base 10 is provided with a bearing 1, the bearing 1 is a ball bearing, the outer ring of the bearing 1 is fixedly connected with the base 10, the support rod 6 is a round rod, the lower end of the support rod 6 is connected with the inner ring of the bearing 1, and the lower end of the support rod 6 is connected with the bearing 1. There is an interference fit between the inner rings, and the wind vane 9 is welded on the upper end of the support rod 6 .

[0028] Multiple energy-capturing mechanisms can be provided sequentially from top to bottom along the length of t...

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Abstract

The invention discloses a self-adaptive wide-band fluid energy harvesting device. The device is characterized in that the device comprises a base, a supporting rod, an energy harvesting mechanism and a rectification storage circuit, wherein the lower end of the supporting rod is movably connected to the base to make the supporting rod rotate along with the wind; one or more energy harvesting mechanisms are arranged, each energy harvesting mechanism comprise a cantilever beam, a piezoelectric bimorph and a light cylinder, one end of each cantilever beam is fixed to the supporting rod, the top of each piezoelectric bimorph is fixed to the other end of the corresponding cantilever beam, and the bottom of each piezoelectric bimorph is fixed to the center of the top of the corresponding light cylinder. The energy harvesting device is simple in structure; since the energy harvesting device interferes with the influence of the cylinders on a flow field, the energy harvesting device can obviously improve the vibration amplitude and frequency locking range of each light cylinder, and accordingly more effective power can be outputted.

Description

technical field [0001] The invention relates to the technical field of new energy and energy supply of microelectronic devices, in particular to an adaptive broadband fluid energy harvester. Background technique [0002] At present, new microelectronic products are widely used in engineering, such as micro-robots, biosensors, health monitors, etc., and they require power as low as a few microwatts during normal operation. Therefore, this provides an opportunity for the development of small energy capture technology. [0003] Fluid flow is widely distributed in nature and contains huge energy, such as ocean currents and rivers. In addition, the wind in the atmosphere is also a typical fluid motion, which can induce the so-called flow-induced vibration of the structure. The traditional method is mainly to convert fluid flow into usable electrical energy through turbines or blades, and the conversion mechanism is electromagnetic energy capture. However, in order to obtain co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18H02J7/34
CPCH02J7/345H02N2/185
Inventor 代胡亮张岚斌王琳
Owner HUAZHONG UNIV OF SCI & TECH
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