TW201438379A - Electromotive force generation device and power generation module using the same - Google Patents
Electromotive force generation device and power generation module using the same Download PDFInfo
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Description
本發明係與發電模組有關，特別是關於一種藉由磁場移動使線圈產生感應電動勢之電動勢產生裝置，以及使用該電動勢產生裝置而發電的發電模組。 The present invention relates to a power generation module, and more particularly to an electromotive force generating device that generates an induced electromotive force by a magnetic field by moving a magnetic field, and a power generating module that generates power using the electromotive force generating device.
一般人在日常生活中都會使用到許多遙控器，例如電視機、冷氣機等等家電用品的遙控器、建築物大門的遙控器、汽車中控鎖的遙控器，或者Wii遊戲機的操控搖桿等等，該等遙控器通常都是藉由電池供電，所以很容易發生電池突然沒電卻無其他電池可更換的狀況，相當不方便。然而，前述該等遙控器都是會被使用者移動其位置的可動器具，有些還會被人們隨身攜帶而長時間隨人體晃動，甚至，遊戲機的操控搖桿更會被使用者刻意地劇烈搖晃。 Most people use many remote controls in their daily lives, such as remote controls for home appliances such as TVs, air conditioners, remote controls for building doors, remote controls for car-controlled locks, or joysticks for Wii consoles. Etc., these remote controllers are usually powered by batteries, so it is easy to cause the battery to suddenly lose power but no other batteries can be replaced, which is quite inconvenient. However, the aforementioned remote controllers are all movable devices that can be moved by the user, and some of them are carried by people and shake with the human body for a long time, and even the joystick of the game machine is deliberately severely degraded by the user. shake.
換言之，使用者在無意間已施予該等遙控器許多動能，若該些動能可在遙控器中轉換為電能，即可供應該遙控器所需用電，不但節省金錢與能源，更可避免突然沒電的狀況。甚至，大部分遙控器每次被使用的時間都很短，僅靠使用者在使用前將遙控器搖晃數秒以提供動能，其所轉換出的電能可能已足以提供遙控器該次用電，如此一來，該遙控器即不需使用任何電池。 In other words, the user has inadvertently applied a lot of kinetic energy to the remote controllers. If the kinetic energy can be converted into electric energy in the remote controller, the power required for the remote controller can be supplied, which not only saves money and energy, but also avoids Suddenly no electricity. Even most remote controls are used for a short period of time. The user can shake the remote control for a few seconds to provide kinetic energy before use. The converted power may be enough to provide the remote control for the power. In one case, the remote control does not require any battery.
本發明之主要目的在於提供一種電動勢產生裝置，以及 一種使用該電動勢產生裝置之發電模組，該電動勢產生裝置可在被移動或搖晃時產生感應電動勢，使得該發電模組發電，以節省金錢與能源，並可用以提升需使用電能之可動器具的便利性。 The main object of the present invention is to provide an electromotive force generating device, and A power generation module using the electromotive force generating device, the electromotive force generating device can generate an induced electromotive force when being moved or shaken, so that the power generation module generates electricity to save money and energy, and can be used to promote a movable device that needs to use electric energy. Convenience.
為達成上述目的，本發明所提供之電動勢產生裝置包含 有一殼件、至少一線圈單元、一第一固定磁性件、一第二固定磁性件，以及一可動磁性件。該殼件具有二相對之板體，以及一位於該二板體之間的容置空間。該線圈單元係固設於該殼件之一該板體。第一、第二固定磁性件係固定地設置於該容置空間，且第一、第二固定磁性件之磁性係相反。該可動磁性件之磁性係與該第一固定磁性件之磁性相反，該可動磁性件係設置於該容置空間，且該可動磁性件可在一接近該第二固定磁性件一側之第一位置與一接近該第二固定磁性件另一側之第二位置之間沿著該第一固定磁性件之一外周面移動，並可經過該線圈單元與另一該板體之間。 In order to achieve the above object, an electromotive force generating device provided by the present invention includes There is a shell member, at least one coil unit, a first fixed magnetic member, a second fixed magnetic member, and a movable magnetic member. The shell member has two opposite plates and an accommodating space between the two plates. The coil unit is fixed to one of the shell members. The first and second fixed magnetic members are fixedly disposed in the accommodating space, and the magnetic properties of the first and second fixed magnetic members are opposite. The magnetic property of the movable magnetic member is opposite to the magnetic property of the first fixed magnetic member, the movable magnetic member is disposed in the accommodating space, and the movable magnetic member is first on a side close to the second fixed magnetic member The position moves along an outer peripheral surface of one of the first fixed magnetic members and a second position near the other side of the second fixed magnetic member, and is possible to pass between the coil unit and the other of the plates.
本發明所提供之發電模組包含有一如前述之電動勢產 生裝置，以及一電路裝置，該電路裝置係與該電動勢產生裝置之線圈單元電性連接，且該電路裝置包含有一儲電元件。 The power generation module provided by the invention comprises an electromotive production as described above And a circuit device electrically connected to the coil unit of the electromotive force generating device, and the circuit device includes a storage element.
藉此，當該電動勢產生裝置被移動或搖晃時，該可動磁 性件會沿著該第一固定磁性件之外周面移動並可經過該線圈單元，而且，藉由該可動磁性件與該第二固定磁性件因磁性相同而相斥之特性，該第二固定磁性件可使該可動磁性件在該第一位置與該第二位置之間往復移動，使得通過該線圈裝置的磁通量不斷改變而產生感應電 動勢，進而使該線圈裝置產生電流並將電能儲存在該儲電元件。該發電模組可設置於一可動器具，例如遙控器等等，該可動器具可很容易地使該發電模組發電，且該發電模組產生之電能可用以提供該可動器具所需用電，以節省金錢與能源，並可避免該可動器具突然沒電，因而可提升其便利性。 Thereby, when the electromotive force generating device is moved or shaken, the movable magnetic The movable member moves along the outer peripheral surface of the first fixed magnetic member and can pass through the coil unit, and the second fixed portion is repelled by the same magnetic property of the movable magnetic member and the second fixed magnetic member. The magnetic member can reciprocate the movable magnetic member between the first position and the second position, so that the magnetic flux passing through the coil device is continuously changed to generate an induction current The momentum, in turn, causes the coil device to generate current and store electrical energy in the electrical storage element. The power generation module can be disposed on a movable device, such as a remote controller, etc., the movable device can easily generate power for the power generation module, and the power generated by the power generation module can be used to provide power for the movable device. In order to save money and energy, and to avoid the sudden loss of power of the movable device, the convenience can be improved.
有關本發明所提供之電動勢產生裝置及使用該電動勢 產生裝置之發電模組的詳細構造、特點、組裝或使用方式，將於後續的實施方式詳細說明中予以描述。然而，在本發明領域中具有通常知識者應能瞭解，該等詳細說明以及實施本發明所列舉的特定實施例，僅係用於說明本發明，並非用以限制本發明之專利申請範圍。 An electromotive force generating device provided by the present invention and using the same The detailed construction, features, assembly or use of the power generation module of the generating device will be described in the detailed description of the subsequent embodiments. However, it should be understood by those of ordinary skill in the art that the present invention is not limited by the scope of the invention.
10‧‧‧發電模組 10‧‧‧Power Module
20‧‧‧電動勢產生裝置 20‧‧‧Electrical potential generating device
30‧‧‧電路裝置 30‧‧‧Circuit devices
32‧‧‧整流電路 32‧‧‧Rectifier circuit
34‧‧‧儲電元件 34‧‧‧Power storage components
40‧‧‧殼件 40‧‧‧Shell
42‧‧‧板體 42‧‧‧ board
44‧‧‧側板 44‧‧‧ side panels
46‧‧‧容置空間 46‧‧‧ accommodating space
50‧‧‧線圈單元對 50‧‧‧ coil unit pair
52‧‧‧線圈單元 52‧‧‧ coil unit
522‧‧‧導體 522‧‧‧Conductor
524‧‧‧線圈繞組 524‧‧‧ coil winding
60‧‧‧第一固定磁性件 60‧‧‧First fixed magnetic parts
62‧‧‧外周面 62‧‧‧ outer perimeter
70‧‧‧第二固定磁性件 70‧‧‧Second fixed magnetic parts
80‧‧‧可動磁性件 80‧‧‧ movable magnetic parts
90‧‧‧電動勢產生裝置 90‧‧‧Electrical potential generating device
91‧‧‧第一線圈單元對 91‧‧‧First coil unit pair
912‧‧‧第一線圈單元 912‧‧‧First coil unit
92‧‧‧第二線圈單元對 92‧‧‧Second coil unit pair
922‧‧‧第二線圈單元 922‧‧‧second coil unit
93‧‧‧第三線圈單元對 93‧‧‧third coil unit pair
932‧‧‧第三線圈單元 932‧‧‧third coil unit
D1‧‧‧第一方向 D1‧‧‧ first direction
D2‧‧‧第二方向 D2‧‧‧ second direction
P1‧‧‧第一位置 P1‧‧‧ first position
P2‧‧‧第二位置 P2‧‧‧ second position
P3‧‧‧中間位置 P3‧‧‧ intermediate position
以下將藉由所列舉之實施例配合隨附之圖式，詳細說明本發明之技術內容及特徵，其中：第一圖為本發明一第一較佳實施例所提供之電動勢產生裝置的頂視示意圖，係顯示該電動勢產生裝置之一可動磁性件位於一中間位置之態樣；第二圖為一使用該電動勢產生裝置之發電模組的剖視示意圖；第三圖及第四圖為該電動勢產生裝置的剖視示意圖，係分別顯示該可動磁性件位於一第一位置與一第二位置之態樣；以及第五圖為本發明一第二較佳實施例所提供之電動勢產生裝置的頂視示意圖。 The technical content and features of the present invention will be described in detail below with reference to the accompanying drawings, in which: FIG. 1 is a top view of an electromotive force generating device according to a first preferred embodiment of the present invention. The schematic diagram shows a state in which the movable magnetic member of the electromotive force generating device is located at an intermediate position; the second figure is a schematic cross-sectional view of a power generating module using the electromotive force generating device; the third and fourth figures show the electromotive force A schematic cross-sectional view of the generating device respectively showing a state in which the movable magnetic member is located at a first position and a second position; and a fifth view showing the top of the electromotive force generating device provided by a second preferred embodiment of the present invention See the schematic.
申請人首先在此說明，在以下將要介紹之實施例以及圖 式中，相同之參考號碼，表示相同或類似之元件或其結構特徵。請先參閱第一圖至第四圖，本發明一第一較佳實施例所提供之發電模組10包含有一電動勢產生裝置20及一電路裝置30。該電動勢產生裝置20包含有一殼件40、一線圈單元對50、一第一固定磁性件60、一第二固定磁性件70，以及一可動磁性件80。 The applicant first explains here, the embodiments and figures to be described below. In the formula, the same reference numerals denote the same or similar elements or structural features thereof. Referring to the first to fourth figures, a power generating module 10 according to a first preferred embodiment of the present invention includes an electromotive force generating device 20 and a circuit device 30. The electromotive force generating device 20 includes a case member 40, a coil unit pair 50, a first fixed magnetic member 60, a second fixed magnetic member 70, and a movable magnetic member 80.
該殼件40可由鋁、塑鋼、壓克力等等不具鐵電性之材料 所製成。該殼件40具有二相對之圓形板體42、一連接該二板體42之環形側板44，以及一由該二板體42及該側板44所定義出之容置空間46。 The shell member 40 can be made of aluminum, plastic steel, acrylic, etc., which is not ferroelectric. Made. The housing member 40 has two opposite circular plates 42 , an annular side plate 44 connecting the two plates 42 , and an accommodating space 46 defined by the two plates 42 and the side plates 44 .
該線圈單元對50包含有二線圈單元52，各該線圈單元52 之結構與習用者相同，包含有一導體522，以及一纏繞於該導體522之線圈繞組524。該二線圈單元52係藉由環氧樹脂或合成樹脂等強力接著劑而分別固設於該二板體42，且該二線圈單元52係位於相對應之位置。 The coil unit pair 50 includes two coil units 52, each of the coil units 52. The structure is the same as that of the conventional one, including a conductor 522, and a coil winding 524 wound around the conductor 522. The two coil units 52 are respectively fixed to the two plates 42 by a strong adhesive such as epoxy resin or synthetic resin, and the two coil units 52 are located at corresponding positions.
該等磁性件60、70、80分別為一圓餅狀之磁鐵，其中， 該可動磁性件80係與該第一固定磁性件60磁性相反，且與該第二固定磁性件70磁性相同；意即，當該磁性件60之磁極方向為S，磁性件70、80之磁極方向則為N，反之亦可。該等磁性件60、70、80係設置於該容置空間46，該二固定磁性件60、70係相鄰接，並與該二板體42固接而相對該殼件40固定不動，該可動磁性件80係吸附於該第一固定磁性件60之一外周面62。 The magnetic members 60, 70, 80 are respectively a round cake-shaped magnet, wherein The movable magnetic member 80 is magnetically opposite to the first fixed magnetic member 60 and magnetically identical to the second fixed magnetic member 70; that is, when the magnetic pole direction of the magnetic member 60 is S, the magnetic poles of the magnetic members 70 and 80 The direction is N, and vice versa. The magnetic members 60, 70, and 80 are disposed in the accommodating space 46. The two fixed magnetic members 60 and 70 are adjacent to each other, and are fixed to the second plate 42 and fixed relative to the case member 40. The movable magnetic member 80 is adsorbed to one outer peripheral surface 62 of the first fixed magnetic member 60.
該電路裝置30包含有一整流電路32及一儲電元件34，該 儲電元件34可為一電容或可重複充電之電池。各該線圈繞組524之二端 係與該電路裝置30電性連接。 The circuit device 30 includes a rectifier circuit 32 and a storage element 34. The electrical storage component 34 can be a capacitive or rechargeable battery. Two ends of each of the coil windings 524 It is electrically connected to the circuit device 30.
藉此，當該電動勢產生裝置20被移動或搖晃時，該可動 磁性件80可朝如第一圖所示之一第一方向D1或一第二方向D2沿著該第一固定磁性件60之外周面62移動。當該可動磁性件80朝第一方向D1移動至一接近該第二固定磁性件70一側之第一位置P1(如第三圖所示)時，受到該二磁性件70、80之磁斥力作用，該可動磁性件80會轉而朝第二方向D2移動。當該可動磁性件80朝第二方向D2移動至一接近該第二固定磁性件70另一側之第二位置P2(如第四圖所示)時，受到該二磁性件70、80之磁斥力作用，該可動磁性件80會轉而朝第一方向D1移動。當該可動磁性件80移動至一如第一圖所示之中間位置P3時，該第一固定磁性件60係位於該第二固定磁性件70與該可動磁性件80之間，且該可動磁性件80係位於該二線圈單元52之間。 Thereby, when the electromotive force generating device 20 is moved or shaken, the movable The magnetic member 80 is movable along the outer peripheral surface 62 of the first fixed magnetic member 60 in a first direction D1 or a second direction D2 as shown in the first figure. When the movable magnetic member 80 is moved in the first direction D1 to a first position P1 close to the side of the second fixed magnetic member 70 (as shown in the third figure), the magnetic repulsive force of the two magnetic members 70, 80 is received. Actuation, the movable magnetic member 80 will in turn move in the second direction D2. When the movable magnetic member 80 is moved in the second direction D2 to a second position P2 close to the other side of the second fixed magnetic member 70 (as shown in the fourth figure), the magnetic of the two magnetic members 70, 80 is received. With the repulsion, the movable magnetic member 80 is turned to move in the first direction D1. When the movable magnetic member 80 is moved to an intermediate position P3 as shown in the first figure, the first fixed magnetic member 60 is located between the second fixed magnetic member 70 and the movable magnetic member 80, and the movable magnetic A member 80 is located between the two coil units 52.
換言之，藉由該電動勢產生裝置20受到移動或搖晃，以 及該二磁性件70、80之磁斥力作用，該可動磁性件80可在該第一位置P1與該第二位置P2之間往復迴旋移動，且該可動磁性件80在移動時可經過該二線圈單元52之間。 In other words, by the electromotive force generating device 20 being moved or shaken, And the magnetic repulsion force of the two magnetic members 70, 80, the movable magnetic member 80 can reciprocally move between the first position P1 and the second position P2, and the movable magnetic member 80 can pass the two when moving Between the coil units 52.
如此一來，通過各該線圈單元52的磁通量不斷改變而產 生感應電動勢，使得各該線圈單元52產生電流並將電能儲存在該儲電元件34。該發電模組10可為一單純用以發電之器具；或者，該發電模組10可設置於一可動器具(圖中未示)，例如遙控器等等，該可動器具被使用者攜帶在身上或被使用時可很容易地使該電動勢產生裝置20受到移動或搖晃，進而使該發電模組10發電，且該發電模組10產生之電 能可用以提供該可動器具所需用電，以節省金錢與能源，並可避免該可動器具突然沒電，因而可提升其便利性。 As a result, the magnetic flux of each of the coil units 52 is continuously changed. The electromotive force is induced such that each of the coil units 52 generates a current and stores the electric energy in the electric storage element 34. The power generating module 10 can be a device for generating electricity. Alternatively, the power generating module 10 can be disposed on a movable device (not shown), such as a remote controller, etc., and the movable device is carried by the user. Or when the device is used, the electromotive force generating device 20 can be easily moved or shaken, so that the power generating module 10 generates electricity, and the power generated by the power generating module 10 is generated. It can be used to provide the power required for the movable device to save money and energy, and can avoid the sudden loss of power of the movable device, thereby improving the convenience.
在前述實施例中，該可動磁性件80之厚度係小於該第一 固定磁性件60之厚度(如第二圖所示)，因此該可動磁性件80係呈懸空狀態而不與該殼件20接觸，藉此，該可動磁性件80所受摩擦力小，而且該可動磁性件80又與該第二固定磁性件70相斥而不會相互碰撞，因此，該可動磁性件80移動速度快且噪音小。 In the foregoing embodiment, the thickness of the movable magnetic member 80 is smaller than the first The thickness of the magnetic member 60 is fixed (as shown in the second figure), so that the movable magnetic member 80 is in a suspended state without being in contact with the case member 20, whereby the movable magnetic member 80 is subjected to a small friction force, and the The movable magnetic member 80 is repelled with the second fixed magnetic member 70 without colliding with each other. Therefore, the movable magnetic member 80 has a high moving speed and low noise.
請參閱第五圖，本發明一第二較佳實施例所提供之電動 勢產生裝置90與前述該電動勢產生裝置20之差異在於，該電動勢產生裝置90設有較多線圈單元。詳而言之，該電動勢產生裝置90之殼件40固設有與前述實施例之線圈單元對50相同之一第一線圈單元對91、一第二線圈單元對92及一第三線圈單元對93，該第一線圈單元對91包含有分別設於該殼件40之二圓形板體42的二第一線圈單元912，該第二線圈單元對92包含有分別設於該二板體42的二第二線圈單元922，該第三線圈單元對93包含有分別設於該二板體42的二第三線圈單元932，該可動磁性件80位於如第一實施例所述之第一位置P1、第二位置P2及中間位置P3時，係分別位於該二第一線圈單元912之間、該二第二線圈單元922之間及該二第三線圈單元832之間。藉此，該可動磁性件80移動時可經過該等線圈單元912、922、932，使得該等線圈單元912、922、932皆產生感應電動勢而產生較多電能。 Please refer to the fifth figure, which is provided by a second preferred embodiment of the present invention. The potential generating device 90 differs from the aforementioned electromotive force generating device 20 in that the electromotive force generating device 90 is provided with a plurality of coil units. In detail, the housing member 40 of the electromotive force generating device 90 is fixed with a first coil unit pair 91, a second coil unit pair 92 and a third coil unit pair which are identical to the coil unit pair 50 of the previous embodiment. The first coil unit pair 91 includes two first coil units 912 respectively disposed on the two circular plates 42 of the shell member 40. The second coil unit pairs 92 are respectively disposed on the two plates 42. The second coil unit 922 includes the second coil unit 932 respectively disposed on the two plates 42. The movable magnetic member 80 is located at the first position as described in the first embodiment. P1, the second position P2 and the intermediate position P3 are respectively located between the two first coil units 912, between the two second coil units 922 and between the two third coil units 832. Thereby, the movable magnetic member 80 can pass through the coil units 912, 922, and 932 when moving, so that the coil units 912, 922, and 932 generate an induced electromotive force to generate more electric energy.
事實上，本發明所提供之電動勢產生裝置之線圈單元的 數量並無限制，且不一定要兩兩相對應，各線圈單元之位置亦不限定 在該第一、二位置P1、P2或中間位置P3，只要該可動磁性件80移動時可經過各該線圈單元與一該板體42之間即可，亦即，各線圈單元之位置係對應至該可動磁性件80移動之路徑。 In fact, the coil unit of the electromotive force generating device provided by the present invention There is no limit to the quantity, and it does not have to correspond to each other. The position of each coil unit is not limited. In the first and second positions P1, P2 or the intermediate position P3, as long as the movable magnetic member 80 moves, it can pass between each of the coil units and a plate 42, that is, the position of each coil unit corresponds to The path to which the movable magnetic member 80 moves.
最後，必須再次說明，本發明於前揭實施例中所揭露的構成元件，僅為舉例說明，並非用來限制本案之範圍，其他等效元件的替代或變化，亦應為本案之申請專利範圍所涵蓋。 Finally, it is to be noted that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention, and alternative or variations of other equivalent elements should also be the scope of the patent application of the present application. Covered.
20‧‧‧電動勢產生裝置 20‧‧‧Electrical potential generating device
40‧‧‧殼件 40‧‧‧Shell
42‧‧‧板體 42‧‧‧ board
50‧‧‧線圈單元對 50‧‧‧ coil unit pair
52‧‧‧線圈單元 52‧‧‧ coil unit
60‧‧‧第一固定磁性件 60‧‧‧First fixed magnetic parts
62‧‧‧外周面 62‧‧‧ outer perimeter
70‧‧‧第二固定磁性件 70‧‧‧Second fixed magnetic parts
80‧‧‧可動磁性件 80‧‧‧ movable magnetic parts
D1‧‧‧第一方向 D1‧‧‧ first direction
D2‧‧‧第二方向 D2‧‧‧ second direction
P3‧‧‧中間位置 P3‧‧‧ intermediate position
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| TW103119841A TW201438379A (en) | 2012-06-13 | 2012-06-13 | Electromotive force generation device and power generation module using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| TW103119841A TW201438379A (en) | 2012-06-13 | 2012-06-13 | Electromotive force generation device and power generation module using the same |
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| Publication Number | Publication Date |
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| TW201438379A true TW201438379A (en) | 2014-10-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846642A (en) * | 2016-04-19 | 2016-08-10 | 中北大学 | Magnet array planar rotation type energy harvester |
| CN106059182A (en) * | 2016-06-28 | 2016-10-26 | 薛鉴哲 | Coaxial eccentric wheel set rotary electromagnetic generator |
| CN114400858A (en) * | 2022-01-18 | 2022-04-26 | 郑州大学 | Magnetic rotation and swing collision type electromagnetic vibration energy capturing device |
| CN114400859A (en) * | 2022-01-18 | 2022-04-26 | 郑州大学 | Magnetic rotation pendulum type multistable electromagnetic vibration energy capturing device |
| CN114400860A (en) * | 2022-01-18 | 2022-04-26 | 郑州大学 | Magnetic rotation and swing collision type nonlinear electromagnetic vibration energy capturing device |
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2012
- 2012-06-13 TW TW103119841A patent/TW201438379A/en unknown
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846642A (en) * | 2016-04-19 | 2016-08-10 | 中北大学 | Magnet array planar rotation type energy harvester |
| CN105846642B (en) * | 2016-04-19 | 2019-05-10 | 中北大学 | Magnet array Plane Rotation formula energy collecting device |
| CN106059182A (en) * | 2016-06-28 | 2016-10-26 | 薛鉴哲 | Coaxial eccentric wheel set rotary electromagnetic generator |
| CN114400858A (en) * | 2022-01-18 | 2022-04-26 | 郑州大学 | Magnetic rotation and swing collision type electromagnetic vibration energy capturing device |
| CN114400859A (en) * | 2022-01-18 | 2022-04-26 | 郑州大学 | Magnetic rotation pendulum type multistable electromagnetic vibration energy capturing device |
| CN114400860A (en) * | 2022-01-18 | 2022-04-26 | 郑州大学 | Magnetic rotation and swing collision type nonlinear electromagnetic vibration energy capturing device |
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