KR20190000950A - Vibration energy harvesting device capable of adjusting operating frequency - Google Patents

Abstract

Disclosed is a vibration energy harvesting device capable of adjusting an operating frequency. According to one embodiment of the present invention, the vibration energy harvesting device capable of adjusting an operating frequency comprises: a cylindrical housing in which an upper surface is opened and a coil wound along an inner circumferential surface thereof is disposed; a housing cover which is coupled to the upper surface of the housing and has an adjusting hole formed through in a vertical direction and an adjusting means disposed on an upper portion of the adjusting hole to be exposed to the outside; a first elastic body which is disposed on an upper portion of the housing and a second elastic body which is disposed on a lower portion of the housing so as to face the first elastic body; a first magnetic body which is disposed on a lower portion of the first elastic body and connected to the first elastic body to vibrate together, and a second magnetic body which is disposed on an upper portion of the second elastic body and connected to the second elastic body to vibrate together; and a third elastic body which is disposed to be in contact with the adjusting means and the first elastic body therebetween and pressurizes the first elastic body by an operation of the adjusting means.

Description

TECHNICAL FIELD [0001] The present invention relates to a vibration energy harvesting apparatus capable of adjusting an operating frequency,

An embodiment according to the concept of the present invention relates to a vibration energy harvesting apparatus, and more particularly, to a vibration energy harvesting apparatus capable of easily adjusting an operating frequency.

An energy harvesting device refers to a device for re-harvesting natural energy and converting it into electrical energy. In particular, a vibration energy harvesting device refers to a device that re-harvests the mechanical vibration energy consumed and converts it into electric energy.

On the other hand, as the mechanical vibration energy, vibration of each site occurring at a plant site such as a factory, a traffic site such as a railroad, a road, or a bridge is used.

Such mechanical vibrations are characterized in that they are vibrated at a certain frequency for each site, and the vibration energy harvesting apparatus using the vibrations is generally designed to have a resonance type. The vibration energy harvesting device designed as a resonant type is advantageous in maximizing the conversion efficiency by matching the mechanical impedance and the electrical impedance.

However, the vibration energy harvesting apparatus designed to have a resonance type has a problem that the conversion efficiency sharply drops when vibration of a frequency different from a predetermined frequency is applied.

SUMMARY OF THE INVENTION The present invention provides a vibration energy harvesting apparatus capable of easily adjusting an operating frequency of a vibration energy harvesting apparatus when the frequency of an external vibration is changed, .

A vibration energy harvesting apparatus capable of adjusting an operating frequency according to an embodiment of the present invention includes: a cylindrical housing having an open top surface and a coil wound around an inner circumferential surface thereof; a cylindrical housing coupled to an open top surface of the housing, A housing cover having an adjustment hole penetratingly formed in the upper and lower direction and an adjustment means disposed on one side exposed to the outside of the adjustment hole, a first elastic body disposed on an upper portion of the housing, and a lower elastic member disposed on the lower portion of the housing to face the first elastic body A second magnetic body disposed on the lower portion of the first elastic body and vibrating in conjunction with the first elastic body and a second magnetic body disposed on the second elastic body and vibrating in conjunction with the second elastic body, And a second elastic member disposed in contact with the adjusting means and the first elastic member, A third elastic body to pressure.

According to an embodiment of the present invention, the adjusting means is formed with an adjusting groove on the upper portion, a thread is formed on the inner peripheral surface of the adjusting hole and on the outer peripheral surface of the adjusting means, and the adjusting hole and the adjusting means are screwed.

According to the embodiment, the vibrational energy harvesting device capable of adjusting the operating frequency is configured such that the first elastic body and the second elastic body are pre-tensioned by the pressures applied from the upper portion of the housing to the lower portion thereof, .

According to an embodiment, the vibration energy harvesting device capable of adjusting the operating frequency includes first supporting means for connecting and supporting the first elastic body and the first magnetic body, and second supporting means for coupling and supporting the second elastic body and the second magnetic body Second supporting means, and third supporting means for connecting and supporting the first magnetic body and the second magnetic body.

According to the embodiment, the vibrational energy harvesting device capable of adjusting the operating frequency is configured such that the first elastic body and the second elastic body are pre-tensioned by the pressures applied from the upper portion of the housing to the lower portion thereof, Wherein the first pressure includes a first pressure, a second pressure, and a third pressure, wherein the first pressure is a pressure applied to the first elastic body through the adjustment hole, the adjustment means, and the third elastic body, And each of the second pressure and the third pressure is a pressure applied to the second elastic body through the first supporting means, the second supporting means, and the third supporting means.

According to another aspect of the present invention, there is provided a vibration energy harvesting apparatus capable of adjusting an operating frequency, comprising: a cylindrical housing having a bottom opened and a coil wound around an inner circumferential surface thereof, A housing cover having an adjustment hole penetratingly formed in the upper and lower direction and an adjustment means disposed on one side exposed to the outside of the adjustment hole, a first elastic body disposed on an upper portion of the housing, and a lower elastic member disposed on the lower portion of the housing to face the first elastic body A second magnetic body disposed on the lower portion of the first elastic body and vibrating in conjunction with the first elastic body and a second magnetic body disposed on the second elastic body and vibrating in conjunction with the second elastic body, And a second elastic member disposed to abut between the adjusting means and the second elastic member, A third elastic member for pressing.

According to another embodiment of the present invention, there is provided a vibration energy harvesting apparatus capable of adjusting an operating frequency, comprising: a cylindrical housing having an upper and lower openings and a coil wound around an inner circumferential surface thereof; A housing cover having a first adjusting hole penetrating in the vertical direction and a first adjusting means disposed on one side exposed to the outside in the first adjusting hole, a housing cover fastened to the opened lower surface of the housing, A first elastic member disposed at an upper portion in the housing and a second elastic member disposed at a lower portion of the housing so as to face the first elastic member, A first magnetic body disposed at a lower portion of the first elastic body and vibrating in conjunction with the first elastic body, and a second magnetic body disposed at a lower portion of the first elastic body, A second magnetic body disposed on an upper portion of the adult body and vibrating in conjunction with the second elastic body, a second magnetic body arranged to contact between the first adjusting means and the first elastic body, And a fourth elastic body disposed to abut between the second adjusting means and the second elastic body and pressurizing the second elastic body by the operation of the second adjusting means.

The vibration energy harvesting device capable of adjusting the operating frequency according to an embodiment of the present invention can easily change the operating frequency so that the vibration energy harvesting device can operate on the resonance frequency, do.

The vibrational energy harvesting device capable of adjusting the operating frequency according to another embodiment of the present invention differs from the vibrational energy harvesting device in that the operating frequency of the vibrational energy harvesting device is wider by changing the pre- Adjustable in the range.

BRIEF DESCRIPTION OF THE DRAWINGS A brief description of each drawing is provided to more fully understand the drawings recited in the description of the invention.
1 is a perspective view of a vibration energy harvesting device capable of adjusting an operating frequency according to an embodiment of the present invention.
2 is a cross-sectional view of a vibration energy harvesting apparatus capable of adjusting the operating frequency according to an embodiment of the present invention.
FIG. 3 is a view for explaining a process of adjusting the operating frequency of a vibration energy harvesting apparatus capable of adjusting an operating frequency according to an embodiment of the present invention.
4 (a) and 4 (b) are a plan view and a bottom view, respectively, of a vibration energy harvesting apparatus capable of adjusting an operating frequency according to another embodiment of the present invention.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. Further, in order to clearly explain the present invention, parts not related to the description are omitted in the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals refer to like elements throughout the specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a vibration energy harvesting device capable of adjusting an operating frequency according to an embodiment of the present invention. 2 is a cross-sectional view of a vibration energy harvesting apparatus capable of adjusting the operating frequency according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a vibration energy harvesting apparatus capable of adjusting an operating frequency according to an embodiment of the present invention includes a housing 10, a housing cover 30, and a base 50.

The housing 10 can transmit external vibrations to the inside of the housing 10 and protect the components provided inside the housing 10 so that they can function perfectly.

Here, the external vibration may be a mechanical vibration having a predetermined frequency, and may be a vibration generated at an industrial plant site such as a factory, a traffic field such as a railway, a road, or a bridge. More specifically, the external vibration may have a frequency of 20 to 200 Hz, but the scope of the present invention is not limited thereto.

The housing 10 includes a coil 100, a first elastic body 110-1, a second elastic body 110-2, a first magnetic body 120-1, and a second magnetic body 120-2 And support means 130,140, 150 for supporting each of the component parts 100, 110-1, 110-2, 120-1, 120-2 inside the housing according to an embodiment .

Meanwhile, the housing 10 may have a cylindrical shape, but the scope of the present invention is not limited thereto.

In addition, the housing 10 may have a shape in which one of the upper surface and the lower surface is opened. However, for convenience of explanation, the housing 10 having the opened upper surface will be described. However, the scope of the present invention is not limited thereto.

The coil 100 is wound and arranged along the inner circumferential surface of the housing 10 and is wound around the coil 100 according to the vibration of the first magnetic body 120-1 and the second magnetic body 120-2, The induced electromotive force can be generated.

The first elastic body 110-1 and the second elastic body 110-2 may be disposed at the upper portion and the lower portion of the housing 10, respectively. The direction of the external vibration transmitted to the housing 10 can be switched in the vertical direction of the housing 10.

Each of the first elastic body 110-1 and the second elastic body 110-2 may be realized as a leaf spring having the same shape as the shape of the housing 10, The constants can be the same.

The first magnetic body 120-1 and the second magnetic body 120-2 oscillate with the first elastic body 110-1 and the second elastic body 110-2 in the vertical direction of the housing 10 So that an induced electromotive force can be generated in the coil 100.

The supporting means 130 connects and supports the first elastic body 110-1 and the first magnetic body 120-1 and connects and supports the second elastic body 110-2 and the second magnetic body 120-2. can do. The first elastic body 110-1 and the first magnetic body 120-1 can vibrate in cooperation with each other by the support means 130 and the second elastic body 110-2 and the second magnetic body 120-2 It can oscillate in conjunction.

The supporting means 140 may connect and support the first magnetic body 120-1 and the second magnetic body 120-2. The first magnetic body 120-1 and the second magnetic body 120-2 can vibrate in the same direction and at the same frequency while maintaining a predetermined separation distance by the support means 140. [

The support means 150 may connect and support the coil 100, the first elastic body 110-1 and the second elastic body 110-2. The coil 100 can be fixedly disposed on the inner peripheral surface of the housing 10 by the support means 150. [

The housing cover 30 is fastened to one opened surface of the housing 10 using the housing cover fastening means 160 and serves to accommodate the components contained in the housing 10 together with the housing 10 An adjusting hole 300 and an adjusting means 320. [

The adjustment hole 300 may be vertically formed at the center of the housing cover 30 and the adjustment means 320 may be disposed at one side exposed to the outside of the adjustment hole 300.

According to an embodiment, the adjusting means 320 may have an adjusting groove 340 at one end thereof and a thread may be formed at the inner peripheral surface of the adjusting hole 300 and the outer peripheral surface of the adjusting means 320. In this case, the adjusting means 320 can be screwed into the adjusting hole 300. The adjusting means 320 can be moved in the vertical direction of the housing cover 30 by using the adjusting groove 340 by the user of the vibration energy harvesting apparatus.

The third elastic body 360 may be arranged to contact between the regulating means 320 and the first elastic body 110-1 when the housing cover 30 is fastened to the upper surface of the housing 10.

The third elastic body 360 can be moved in the vertical direction of the housing cover 30 by the movement of the adjustment means 320 to press the first elastic body 110-1. According to an embodiment, the third elastic body 360 may be a coil spring. In this case, when the adjusting means 320 is screwed into the adjusting hole 300, the adjusting means 320 is fitted into the adjusting hole 300, and the adjusting means 320 is tightened by using the adjusting groove 340 . As the adjustment means 320 is tightened, the third elastic body 360 can be compressed and moved to press the first elastic body 110-1.

The base 50 can be fastened to the housing 10 using the base fastening means 500 and 520 and can be fastened to the installation site according to the purpose of use of the vibration energy harvesting device.

Hereinafter, with reference to FIG. 3, a specific operation and effect of a vibration energy harvesting apparatus capable of adjusting an operating frequency according to an embodiment of the present invention will be described in more detail.

FIG. 3 is a view for explaining a process of adjusting the operating frequency of a vibration energy harvesting apparatus capable of adjusting an operating frequency according to an embodiment of the present invention.

First, a vibration energy harvesting apparatus capable of adjusting the operating frequency according to an embodiment of the present invention is configured such that by the pressures (i.e., a, b, and c) applied from the top to the bottom of the housing 10, The first elastic body 110-1 and the second elastic body 110-2 are pre-tensioned.

Here, the pressures (i.e., a, b, and c) can be divided into a first pressure (a), a second pressure (b), and a third pressure (c).

The first pressure a may be a pressure applied to the first elastic body 110-1a through the adjusting groove 340, the adjusting means 320, and the third elastic body 360. [ The first elastic body 110-1a can be changed to be bent in a downward direction of the housing 10 by a first pressure (a) (110-1b).

The second pressure a and the third pressure c may be pressures applied to the second elastic body 110-2a through the support means 130 and 140. [ The second elastic body 110-2a can be changed to be bent in the lower direction of the housing 10 by the second pressure a and the third pressure c.

On the other hand, when the first elastic body 110-1 and the second elastic body 110-2 are pre-tensioned by the pressures (i.e., a, b, and c) The restoring force of the first elastic body 110-1 and the second elastic body 110-2 may be changed.

As the restoring force of each of the first elastic body 110-1 and the second elastic body 110-2 is changed, the first magnetic body 1101 vibrates in cooperation with the first elastic body 110-1 and the second elastic body 110-2, The vibration frequencies of the first magnetic body 120-1 and the second magnetic body 120-2 can also be changed.

That is, the vibration energy harvesting apparatus capable of adjusting the operating frequency according to an embodiment of the present invention is capable of adjusting the operating frequency of the first magnetic body 120-1 and the second magnetic body 120-1 even when an external vibration different from a predetermined frequency is applied. 120-2 so as to adjust the operating frequency of the vibrating energy harvesting device and to enable the vibrating energy harvesting device to operate on the resonant frequency.

Therefore, the vibrational energy harvesting apparatus capable of adjusting the operating frequency according to an embodiment of the present invention can easily change the operating frequency so that the vibrational energy harvesting apparatus can operate at the resonant frequency, thereby maximizing the conversion efficiency It has the effect of being able to.

4 (a) and 4 (b) are a plan view and a bottom view, respectively, of a vibration energy harvesting apparatus capable of adjusting an operating frequency according to another embodiment of the present invention.

However, in the vibration energy harvesting apparatus shown in Figs. 1 to 3, 4 (a) and 4 (b), each component having the same member number has the same structure and performs the same function. Therefore, detailed description of each constitution having the same reference numeral is omitted. Hereinafter, the vibration energy harvesting apparatus shown in Figs. 1 to 3 and the apparatus shown in Figs. 4 (a) and 4 (b) The emphasis is placed on the differences between vibrational energy harvesting devices.

4 (a) and 4 (b), a vibration energy harvesting device capable of adjusting the operating frequency according to another embodiment of the present invention includes not only the housing cover 30, but also the base 50, (560) having an adjustment hole (540) and an adjustment flaw (580).

In addition, a fourth elastic body (not shown) may be disposed between the adjusting means 560 and the second elastic body 110-2.

The fourth elastic body (not shown) can be moved in the vertical direction of the housing cover 30 by the movement of the adjustment means 560 to press the second elastic body 110-2.

Each of the first elastic body 110-1 and the second elastic body 110-2 may be realized as a leaf spring having the same shape as the shape of the housing 10, Constants can be different from each other. That is, the pre-tension degree of each of the first elastic body 110-1 and the second elastic body 110-2 may be varied to adjust the operating frequency of the vibration energy harvesting apparatus in a wider range .

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Housing
30: Housing cover
50: Base
300: Adjusting hole
320:
340: adjusting groove
360: housing cover fastening means
500: Base fixing means

Claims (7)

A cylindrical housing in which an upper surface is opened and a coil wound around the inner peripheral surface is disposed;
A housing cover coupled to an open top surface of the housing and having adjusting holes formed in the upper and lower directions and adjusting means disposed on one side exposed to the outside of the adjusting holes;
A first elastic body disposed in an upper portion of the housing and a second elastic body disposed in a lower portion of the housing so as to face the first elastic body;
A first magnetic body disposed at a lower portion of the first elastic body and vibrating in conjunction with the first elastic body, and a second magnetic body disposed at an upper portion of the second elastic body and vibrating in conjunction with the second elastic body; And
And a third elastic body disposed in contact with the adjustment means and the first elastic body and pressing the first elastic body by the operation of the adjustment means. [3] The apparatus of claim 1, wherein the adjusting means comprises:
A thread is formed on the inner circumferential surface of the adjusting hole and on the outer circumferential surface of the adjusting means,
Wherein the adjustment hole and the adjustment means are threaded, wherein the operating frequency can be adjusted. The vibration energy harvesting apparatus according to claim 1, wherein the vibration energy harvesting apparatus capable of adjusting the operating frequency comprises:
Wherein the operating frequency is adjustable such that each of the first elastic body and the second elastic body is in a pre-tensioned state by the pressures applied from the upper portion to the lower portion of the housing. The vibration energy harvesting apparatus according to claim 1, wherein the vibration energy harvesting apparatus capable of adjusting the operating frequency comprises:
First supporting means for connecting and supporting the first elastic body and the first magnetic body;
Second supporting means for connecting and supporting the second elastic body and the second magnetic body; And
Further comprising third supporting means for connecting and supporting the first magnetic body and the second magnetic body. 5. The vibration energy harvesting apparatus according to claim 4,
The first elastic body and the second elastic body are pre-tensioned by pressures applied from the upper portion to the lower portion of the housing,
Said pressures comprising a first pressure, a second pressure, and a third pressure,
Wherein the first pressure is a pressure applied to the first elastic body through the adjustment hole, the adjustment means, and the third elastic body,
Wherein the second pressure and the third pressure are pressures applied to the second elastic body through the first support means, the second support means, and the third support means, the vibrational energy harvesting Device. A cylindrical housing whose lower surface is open and in which a coil wound around the inner peripheral surface is disposed;
A housing cover fastened to an open bottom surface of the housing and having adjustment holes formed in the upper and lower directions and adjusting means disposed on one side exposed to the outside of the adjustment holes;
A first elastic body disposed in an upper portion of the housing and a second elastic body disposed in a lower portion of the housing so as to face the first elastic body;
A first magnetic body disposed at a lower portion of the first elastic body and vibrating in conjunction with the first elastic body, and a second magnetic body disposed at an upper portion of the second elastic body and vibrating in conjunction with the second elastic body; And
And a third elastic body disposed in contact with the adjusting means and the second elastic body and pressing the second elastic body by the operation of the adjusting means. A cylindrical housing in which upper and lower surfaces are opened, and a coil wound around the inner peripheral surface is disposed;
A housing cover coupled to an open top surface of the housing and including first adjustment holes formed in a vertical direction and first adjustment means disposed on one side exposed to the outside of the first adjustment holes;
A base coupled to the open bottom surface of the housing and having a second adjusting hole formed in a vertical direction and a second adjusting means disposed on one side exposed to the outside of the second adjusting hole;
A first elastic body disposed in an upper portion of the housing and a second elastic body disposed in a lower portion of the housing so as to face the first elastic body;
A first magnetic body disposed at a lower portion of the first elastic body and vibrating in conjunction with the first elastic body, and a second magnetic body disposed at an upper portion of the second elastic body and vibrating in conjunction with the second elastic body;
A third elastic body disposed to be in contact with the first adjusting means and the first elastic body and pressing the first elastic body by the operation of the first adjusting means; And
And a fourth elastic body disposed to be in contact with the second adjusting means and the second elastic body for pressing the second elastic body by the action of the second adjusting means, Device.

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