Miniature power generating device based on piezoelectric crystal frequency converting mechanism

A frequency conversion, piezoelectric crystal technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the existence of electromagnetic interference, low output voltage, high frequency and other problems, to achieve the effect of reliable operation, high output voltage and high energy density

Inactive Publication Date: 2012-06-27
SHANGHAI JIAO TONG UNIV
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  • Application Information

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Problems solved by technology

[0004] Through the retrieval of prior art documents, it is found that the Chinese patent authorization announcement number CN 2505614Y discloses a vibration power generation device based on electromagnetic conversion. This device directly uses the vibration of nature to generate power. In order to obtain higher power generation efficiency, it is necessary to use the necessary frequency conversion mechanism to increase the frequency. In addition, the power generation device based on electromagnetic conversion has disadvantages such as low output voltage, poor compatibility, and electromagnetic interference.

Method used

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  • Miniature power generating device based on piezoelectric crystal frequency converting mechanism
  • Miniature power generating device based on piezoelectric crystal frequency converting mechanism
  • Miniature power generating device based on piezoelectric crystal frequency converting mechanism

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Embodiment 1

[0023] Such as figure 1 , figure 2 and image 3 As shown, this embodiment includes: a base body 1, a frequency conversion mechanism 2 and a set of power generation mechanisms 3, wherein: the frequency conversion mechanism 2 is fixedly arranged on the top of the base body 1, and the power generation mechanism 3 is fixedly arranged inside the base body 1 and connected to the base body 1 In contact with each other, the frequency conversion mechanism 2 and the power generation mechanism 3 are parallel to each other.

[0024] The base 1 is a rectangular structure without a top, made of aluminum material, wherein the bottom surface is a square, the side length is 3 mm, the height is 1.75 mm, and the base body thickness is 200 microns;

[0025] Such as figure 1 and figure 2 As shown, the frequency conversion mechanism 2 includes: four upper planar springs 4, an upper surface permanent magnet 5, a permanent magnet support platform 6 and a lower surface permanent magnet 7, wherei...

Embodiment 2

[0037] Such as Figure 4a and 4b As shown, this embodiment includes: a base body 1, a frequency conversion mechanism 2 and 4 sets of power generating mechanisms 3 with the same structure, wherein: the frequency conversion mechanism 2 is fixedly arranged on the top of the base body 1, and the four sets of power generation mechanisms 3 are fixedly arranged on the top of the base body 1 The four inner sides are in contact with the substrate 1, and the frequency conversion mechanism 2 and the power generation mechanism 3 are parallel to each other.

[0038] The 4 sets of generating mechanisms 3 in this embodiment are the same as those in Embodiment 1, and all include: a soft magnetic metal layer 8, a piezoelectric material 9, a metal electrode 10, and an elastic support layer 11, wherein: one end of the elastic support layer 11 is fixedly arranged Inside the base body 1, the upper surface of the other end of the elastic support layer 11 is provided with a soft magnetic metal laye...

Embodiment 3

[0040] Such as Figure 5a and Figure 5b As shown, this embodiment includes: a base body 1, a frequency conversion mechanism 2 and a set of power generation mechanisms 3, wherein: the frequency conversion mechanism 2 is fixedly arranged on the top of the base body 1, and four sets of power generation mechanisms 3 are fixedly arranged inside the base body 1. The sides are in contact with the substrate 1, and the frequency conversion mechanism 2 and the power generation mechanism 3 are parallel to each other.

[0041] Such as Figure 5b As shown, the power generating mechanism 3 in this embodiment includes: a soft magnetic metal layer 8, a piezoelectric material 9, a metal electrode 10, and an elastic support layer 11, wherein: the elastic support layer 11 is a swastika structure, and the end of the elastic support layer 11 Fixedly arranged inside the base body 1, the upper surface of the center of the elastic support layer 11 is provided with a soft magnetic metal layer 8, the ...

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Abstract

The invention relates to a miniature power generating device based on a piezoelectric crystal frequency converting mechanism in the technical field of microelectromechanics, which comprises a base body, a frequency converting mechanism and one group or multiple groups of power generating mechanisms, wherein the frequency converting mechanism is fixedly arranged at the top of the base body; the power generating mechanisms are fixedly arranged in the base body and are in contact with the base body; and the frequency converting mechanism is parallel to the power generating mechanisms. The invention generates power by the piezoelectric effect of a piezoelectric material; compared with a power generating device in an electromagnetic way, the invention has the obvious advantages of high output voltage, energy density and adaptability, reliable working, and the like.

Description

technical field [0001] The invention relates to a power generating device in the field of micro-electromechanical technology, in particular to a micro power generating device based on a piezoelectric crystal frequency conversion mechanism. Background technique [0002] In recent years, with the continuous development of integrated circuit technology and micro / nano electromechanical system (MEMS / NEMS) technology, the application of wireless sensor network nodes and portable microelectronic products has become more and more extensive. At present, the power supply of micro devices mainly depends on Chemical batteries, there is an obvious disadvantage of using micro-chemical batteries for power supply, that is, the total energy of the batteries is limited and the service life is short. However, as the size of the nodes decreases and the number of uses increases rapidly, it becomes very difficult to replace a large number of exhausted batteries. MEMS Due to the advantages of smal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
Inventor 张卫平秦奎陈文元吴校生崔峰刘武
Owner SHANGHAI JIAO TONG UNIV
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