CN210958201U - Vibration energy harvester - Google Patents

Abstract

The utility model provides a vibration energy collector, include: a collection assembly, the collection assembly comprising: the energy collecting pieces are cantilever beam structures, the lengths of the energy collecting pieces are equal, and the widths of the energy collecting pieces are sequentially increased; the clamping assembly is connected with the energy collecting pieces, and the clamping assembly fixes the energy collecting pieces. The utility model provides a vibration energy collector has improved energy collection efficiency and has realized the operating frequency band extension, further improves the electric energy of conversion, can realize the lasting power supply to microelectronic device.

Description

Vibration energy harvester

Technical Field

The utility model belongs to the technical field of little energy collection device, especially, relate to a vibration energy collector.

Background

The vibration energy harvester collects vibration energy, converts the vibration energy into electrical energy, and supplies power to the microelectronic device.

Because the vibration that takes place in the actual service environment is random, and current vibration energy collector is not high to the vibration collection efficiency not in its natural frequency range to the electric energy that leads to the conversion is less, can not carry out lasting power supply for microelectronic device.

SUMMERY OF THE UTILITY MODEL

To the technical problem that current vibration energy collector vibration collection efficiency is not high, the utility model provides a vibration energy collector can realize the frequency expansion to can collect the vibration of different frequencies, thereby improve energy collection efficiency, further improve the electric energy of conversion, realize the lasting power supply to microelectronic device. In order to achieve the above purpose, the utility model adopts the following technical scheme:

a vibrational energy harvester, comprising:

a collection assembly, the collection assembly comprising:

a plurality of energy collectors, the energy collectors being of equal length and increasing in width;

the clamping assembly is connected with the energy collecting pieces, and the clamping assembly fixes the energy collecting pieces.

Further, the energy harvesting device includes:

the substrate is provided with a protruding part, and the substrate is connected with the clamping assembly through the protruding part;

and the piezoelectric ceramics are connected to two sides of the substrate.

Further, the clamping assembly includes:

the first clamping piece is provided with a polygonal boss, the substrate is electrically connected with the first clamping piece, and the protruding part is in contact with the side face of the polygonal boss;

and the second clamping piece is in insulated connection with the first clamping piece, and is electrically connected with the piezoelectric ceramic.

Further, the clamping assembly further comprises:

the first connecting piece is connected with the first clamping piece;

and the second connecting piece is connected with the second clamping piece.

Compared with the prior art, the utility model discloses there is following beneficial effect at least:

the utility model provides a vibration energy collector is provided with a plurality of energy collecting pieces, and energy collecting piece is used for collecting vibration energy. The energy collecting pieces are arranged to be cantilever beam structures, the lengths of the energy collecting pieces are equal, and the widths of the energy collecting pieces are increased in sequence, so that the first-order natural frequency of the energy collecting pieces is increased in sequence. The energy collecting pieces with the sequentially increasing first-order natural frequencies can collect vibration energy with different frequencies, frequency expansion is achieved, and the problems that an existing vibration energy collector is low in energy collecting efficiency and narrow in frequency band are solved. The utility model provides a vibration energy collector has improved energy collection efficiency and has realized the operating frequency band extension, further improves the electric energy of conversion, can realize the lasting power supply to microelectronic device.

Drawings

Figure 1 is a schematic illustration of an explosive structure of a vibration energy harvester according to the present embodiment;

FIG. 2 is a schematic view of the energy collection member of FIG. 1;

figure 3 is a schematic diagram of the overall structure of the vibration energy harvester of figure 1.

The reference numerals are explained in detail:

1. a collection assembly; 11. an energy harvesting member; 111. a substrate; 1111. a projection; 112. piezoelectric ceramics; 2. a clamping assembly; 21. a first clamping member; 211. a polygonal boss; 22. a first connecting member; 23. a second clamping member; 24. a second connecting member.

Detailed Description

The technical solution in the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is obvious that the described embodiments are only some embodiments, not all embodiments, of the general solution of the present invention. All other embodiments, which can be derived by a person skilled in the art based on the general idea of the invention, fall within the scope of protection of the invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

To the technical problem that current vibration energy collector vibration collection efficiency is not high, the utility model provides a vibration energy collector can realize the frequency expansion to can collect the vibration of different frequencies, thereby improve energy collection efficiency, further improve the electric energy of conversion, realize the lasting power supply to microelectronic device. The technical solution of the present invention will be further explained with reference to the following embodiments.

A vibrational energy harvester, comprising:

collection assembly 1, collection assembly 1 includes:

the energy collecting pieces 11 are equal in length, and the widths of the energy collecting pieces 11 are gradually increased;

the clamping assembly 2, the clamping assembly 2 is connected with the energy collecting pieces 11, and the clamping assembly 2 fixes a plurality of energy collecting pieces 11.

The vibration energy harvester provided by the embodiment is provided with a plurality of energy harvesting parts 11, and the energy harvesting parts 11 are used for harvesting vibration energy. The lengths of the energy collecting pieces 11 are equal, the widths of the energy collecting pieces 11 are sequentially increased, so that the first-order natural frequency of the energy collecting pieces 11 is sequentially increased, the energy collecting pieces 11 are combined to form a working frequency band with continuously changed frequency, the collection of vibration energy with different frequencies is realized, the frequency expansion is realized, and the problems of low energy collecting efficiency and narrow frequency band of the conventional vibration energy collector are solved. The vibration energy collector provided by the embodiment improves the energy collection efficiency, further improves the converted electric energy, and can realize the durable power supply of the microelectronic equipment.

Specifically, referring to fig. 1 to 3, the vibration energy harvester provided in the present embodiment includes a harvesting assembly 1 and a clamping assembly 2.

The harvesting assembly 1 is used to harvest vibrational energy. The collection assembly 1 comprises a plurality of energy harvesting members 11. The energy harvesting member 11 is the primary vibrational energy harvesting element. The energy collecting piece 11 is a cantilever beam structure, so that the sensing capability of the vibration energy can be improved, the stress deformation of the energy collecting element is improved, and the conversion efficiency of the vibration energy is improved. The energy harvesting element 11 includes a substrate 111 and a piezoelectric ceramic 112. The substrate 111 provides a supporting and fixing function, and the substrate 111 is provided with a protrusion 1111, and the protrusion 1111 is used for being connected with the clamping assembly 2. The piezoelectric ceramics 112 are connected to two sides of the substrate 111, and when the substrate 111 collects vibration energy, the substrate 111 is bent, so that the piezoelectric ceramics 112 is deformed to generate electric energy.

The collecting assembly 1 provided by the embodiment includes a plurality of energy collecting members 11, and as described above, the plurality of energy collecting members 11 are configured as cantilever beam structures with equal lengths and sequentially increasing widths, so that the first-order natural frequencies of the plurality of energy collecting members 11 sequentially increase, and the plurality of energy collecting members 11 are combined to form a working frequency band with continuously changing frequencies, thereby realizing collection of vibration energy of different frequencies and realizing frequency expansion. The problems of low energy collection efficiency and narrow frequency band of the conventional vibration energy collector are solved. Meanwhile, the plurality of energy collecting pieces 11 are arranged in a circumferential array, so that the collecting assembly 1 can collect vibration energy in the whole space, and the energy collecting efficiency is improved.

The clamping assembly 2 is used for fixing the collecting assembly 1, and meanwhile, the clamping assembly 2 also plays a role in connecting the interface. Specifically, the clamping assembly 2 includes a first clamping member 21, a first connecting member 22, a second clamping member 23, and a second connecting member 24. The first clamp 21 is electrically connected to the substrate 111, and the first clamp 21 is not in contact with the piezoelectric ceramic 112. The first clamping member 21 is provided with polygonal bosses 211, the shape of the polygonal bosses 211 is determined by the number of the substrates 111, and the convex parts 1111 of the substrates 111 are contacted with the side edges of the polygonal bosses 211, so that the first clamping member 21 is electrically connected with the substrates 111. The first clamping member 21 is also connected with a first connecting member 22 as a connecting interface of the vibration energy collector provided in the present embodiment. The second clamping piece 23 is connected with the first clamping piece 21 in an insulated mode, the second clamping piece 23 is electrically connected with the piezoelectric ceramic 112, and the second clamping piece 23 is electrically connected with the piezoelectric ceramic 112. Similar to the first clamping member 21, a second connecting member 24 is connected to the second clamping member 23 as a connecting interface of the vibration energy harvester provided in the present embodiment.

In order to understand the technical solution of the present invention, the energy collecting process of the present embodiment is further described.

The vibration energy collector provided by the embodiment comprises a plurality of cantilever beam structures, an energy collecting part 11 with inherent first-order frequency gradually changing, a working frequency band with continuously changing frequency formed in a circumferential array arrangement mode, a piezoelectric ceramic 112 for converting vibration energy with different frequencies in an environmental space into electric energy, and an external circuit connected with the electric energy on the piezoelectric ceramic 112 through a second clamping part 23 and a second connecting part 24; the substrate 111 is connected to an external circuit through the first clamp 21 and the first connector 22, thereby achieving the transfer of electric energy.

Claims (4)

1. A vibrational energy harvester, comprising:

a collection assembly, the collection assembly comprising:

the energy collecting pieces are of cantilever beam structures, the lengths of the energy collecting pieces are equal, and the widths of the energy collecting pieces are sequentially increased;

the clamping assembly is connected with the energy collecting pieces and fixes a plurality of energy collecting pieces;

a plurality of said energy harvesting members are arranged in a circumferential array.

2. A vibration energy harvester according to claim 1 wherein the energy harvester comprises:

the substrate is provided with a protruding part, and the substrate is connected with the clamping assembly through the protruding part;

and the piezoelectric ceramics are connected to two sides of the substrate.

3. A vibration energy harvester according to claim 2 wherein the clamp assembly comprises:

the first clamping piece is provided with a polygonal boss, the substrate is electrically connected with the first clamping piece, and the protruding part is in contact with the side face of the polygonal boss;

and the second clamping piece is in insulated connection with the first clamping piece, and is electrically connected with the piezoelectric ceramic.

4. A vibration energy harvester according to claim 3 wherein the clamp assembly further comprises:

the first connecting piece is connected with the first clamping piece;

and the second connecting piece is connected with the second clamping piece.

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