TWI566511B - Piezoelectric generator - Google Patents
Piezoelectric generator Download PDFInfo
- Publication number
- TWI566511B TWI566511B TW104140624A TW104140624A TWI566511B TW I566511 B TWI566511 B TW I566511B TW 104140624 A TW104140624 A TW 104140624A TW 104140624 A TW104140624 A TW 104140624A TW I566511 B TWI566511 B TW I566511B
- Authority
- TW
- Taiwan
- Prior art keywords
- reed
- piezoelectric
- generator according
- piezoelectric generator
- piezoelectric element
- Prior art date
Links
- 235000014676 Phragmites communis Nutrition 0.000 claims description 103
- 239000000463 material Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002033 PVDF binder Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Description
本發明是有關於一種發電器，且特別是有關於一種壓電發電器。The present invention relates to a power generator, and more particularly to a piezoelectric generator.
壓電材料受到外加應力而產生應變的同時會產生電荷堆積的特性，因此能將機械能轉換成電能。但是，必需在所輸入的機械能有變化時才能產生電能輸出，因此壓電材料的能量轉換效率與外加機械能的大小及變化速度相關。就壓電材料應用於發電器而言，為了避免過多的機械能損耗而導致最終的能量轉換效率不佳，習知技術將機械能輸入裝置與壓電發電單元整合成單一單元，如美國專利申請案US 2010/244629 A1。請參照圖1，習知的壓電發電器50是在簧片52上貼有壓電元件54，使用者可以直接按壓簧片52來使壓電元件54變形並發電。壓電發電器50的結構簡單且無過多的機械能損失。但是，簧片52的兩側都固定在剛性的基座56上，因此簧片52的結構過於剛硬。當簧片52受到按壓時，微小的機械能將難以使兩側都固定在剛性的基座56上的簧片52產生較大的形變，也就無法產生較大的電能。Piezoelectric materials are subjected to external stress to generate strain while generating charge accumulation characteristics, thereby converting mechanical energy into electrical energy. However, it is necessary to generate electrical energy output when the input mechanical energy changes, so the energy conversion efficiency of the piezoelectric material is related to the magnitude and speed of the applied mechanical energy. In the case where a piezoelectric material is applied to a power generator, in order to avoid excessive mechanical energy loss, the final energy conversion efficiency is poor, and the conventional technology integrates the mechanical energy input device and the piezoelectric power generation unit into a single unit, such as a US patent application. Case US 2010/244629 A1. Referring to FIG. 1, a conventional piezoelectric generator 50 has a piezoelectric element 54 attached to a reed 52. The user can directly press the reed 52 to deform the piezoelectric element 54 and generate electricity. The piezoelectric generator 50 has a simple structure and no excessive mechanical energy loss. However, both sides of the reed 52 are fixed to the rigid base 56, so that the structure of the reed 52 is too rigid. When the reed 52 is pressed, the slight mechanical energy will make it difficult for the reed 52, which is fixed to the rigid base 56 on both sides, to undergo a large deformation, so that a large electric energy cannot be generated.
本發明提供一種壓電發電器，可解決習知技術的壓電發電器的發電量不足的問題。The present invention provides a piezoelectric generator which can solve the problem of insufficient power generation of a piezoelectric generator of the prior art.
本發明的壓電發電器包括基座、簧片以及壓電元件。基座具有一剛性部與一彈性部。剛性部的彈性小於彈性部的彈性。簧片具有相對的一第一表面與一第二表面以及相對的一第一側與一第二側。第一側固定於剛性部，第二側固定於彈性部。簧片呈弧形。壓電元件附著於簧片上並適於與簧片一起變形。簧片未受按壓時第一表面為凸面。簧片受按壓而使第一表面從凸面變成凹面時，使簧片復位的彈性恢復力會作用在簧片上。The piezoelectric generator of the present invention includes a susceptor, a reed, and a piezoelectric element. The base has a rigid portion and an elastic portion. The elasticity of the rigid portion is smaller than the elasticity of the elastic portion. The reed has a first surface and a second surface opposite to each other and a first side and a second side opposite to each other. The first side is fixed to the rigid portion, and the second side is fixed to the elastic portion. The reed is curved. The piezoelectric element is attached to the reed and adapted to deform together with the reed. The first surface is convex when the reed is not pressed. When the reed is pressed to change the first surface from the convex surface to the concave surface, the elastic restoring force for resetting the reed acts on the reed.
在本發明的一實施例中，簧片在靠近第一側的位置具有一曲率轉折線。In an embodiment of the invention, the reed has a curvature turning line at a position near the first side.
在本發明的一實施例中，壓電元件位於第二側與曲率轉折線之間。簧片未受按壓時，簧片在第二側與曲率轉折線之間的部分的曲率半徑小於簧片在第一側與曲率轉折線之間的部分的曲率半徑。In an embodiment of the invention, the piezoelectric element is located between the second side and the curvature transition line. When the reed is not pressed, the radius of curvature of the portion of the reed between the second side and the curvature turning line is smaller than the radius of curvature of the portion of the reed between the first side and the curvature turning line.
在本發明的一實施例中，剛性部具有一水平部與一垂直部。第一側固定於水平部。彈性部位於垂直部。In an embodiment of the invention, the rigid portion has a horizontal portion and a vertical portion. The first side is fixed to the horizontal portion. The elastic portion is located at the vertical portion.
在本發明的一實施例中，剛性部為一L型板，彈性部為一垂直板，垂直板連接L型板。In an embodiment of the invention, the rigid portion is an L-shaped plate, the elastic portion is a vertical plate, and the vertical plate is connected to the L-shaped plate.
在本發明的一實施例中，簧片的材料為銅或不鏽鋼。In an embodiment of the invention, the material of the reed is copper or stainless steel.
在本發明的一實施例中，簧片呈矩形。In an embodiment of the invention, the reed is rectangular.
在本發明的一實施例中，第一側與第二側為短邊。In an embodiment of the invention, the first side and the second side are short sides.
在本發明的一實施例中，壓電元件為陶瓷壓電元件或聚氟化二乙烯(polyvinylidene fluoride, PVDF)壓電元件。In an embodiment of the invention, the piezoelectric element is a ceramic piezoelectric element or a polyvinylidene fluoride (PVDF) piezoelectric element.
在本發明的一實施例中，壓電元件附著於第一表面與第二表面至少其中之一。In an embodiment of the invention, the piezoelectric element is attached to at least one of the first surface and the second surface.
在本發明的一實施例中，壓電元件的厚度小於等於1 mm。In an embodiment of the invention, the thickness of the piezoelectric element is less than or equal to 1 mm.
在本發明的一實施例中，壓電元件的面積大於簧片的面積的一半。In an embodiment of the invention, the area of the piezoelectric element is greater than half the area of the reed.
在本發明的一實施例中，彈性部為彈簧、有機中空發泡體或感壓膠體(Pressure Sensitive Adhesive, PSA)。In an embodiment of the invention, the elastic portion is a spring, an organic hollow foam or a Pressure Sensitive Adhesive (PSA).
在本發明的一實施例中，壓電發電器更包括一緩衝件，配置於基座上，用以避免簧片受按壓時第二表面直接接觸基座。In an embodiment of the invention, the piezoelectric generator further includes a buffer member disposed on the base to prevent the second surface from directly contacting the base when the spring is pressed.
基於上述，在本發明的壓電發電器中，因為簧片的第二側固定於彈性部，所以較小的按壓力量就可以讓簧片產生較大的形變量，進而提高壓電元件所產生的電量。Based on the above, in the piezoelectric generator of the present invention, since the second side of the reed is fixed to the elastic portion, a small pressing force can cause a large deformation amount of the reed, thereby increasing the piezoelectric element. The amount of electricity.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。The above described features and advantages of the invention will be apparent from the following description.
圖2至圖6是本發明一實施例的壓電發電器的作動狀態的分解示意圖。請參照圖2，本實施例之壓電發電器100包括一基座110、一簧片120以及一壓電元件130。基座110具有一剛性部112與一彈性部114。剛性部112的彈性小於彈性部114的彈性。簧片120具有相對的一第一表面122與一第二表面124以及相對的一第一側126與一第二側128。第一側126固定於剛性部112，第二側128固定於彈性部114。簧片120呈弧形。壓電元件130附著於簧片120上並適於與簧片120一起變形。簧片120未受按壓時第一表面122為凸面。簧片120受按壓而使第一表面122從凸面變成凹面時，使簧片120復位的彈性恢復力會作用在簧片120上。2 to 6 are exploded perspective views showing an operation state of a piezoelectric power generator according to an embodiment of the present invention. Referring to FIG. 2, the piezoelectric generator 100 of the present embodiment includes a susceptor 110, a reed 120, and a piezoelectric element 130. The base 110 has a rigid portion 112 and an elastic portion 114. The elasticity of the rigid portion 112 is smaller than the elasticity of the elastic portion 114. The reed 120 has a first surface 122 and a second surface 124 opposite to each other and a first side 126 and a second side 128 opposite to each other. The first side 126 is fixed to the rigid portion 112 and the second side 128 is fixed to the elastic portion 114. The reed 120 is curved. The piezoelectric element 130 is attached to the reed 120 and adapted to be deformed together with the reed 120. The first surface 122 is convex when the reed 120 is not pressed. When the reed 120 is pressed to change the first surface 122 from the convex surface to the concave surface, the elastic restoring force for resetting the reed 120 acts on the reed 120.
由於簧片120的第二側128固定於較容易產生形變的彈性部114，因此當簧片120受按壓而變形的時候，簧片120可輕易產生較大的變形量。連帶地，隨著簧片120一起變形的壓電元件130也會將變形時的機械能的變化轉換為電能。相較於習知技術的簧片的兩側都被固定在剛性的基座上，本實施例的簧片120可在受到相同按壓力量的條件下獲得較大的變形量。在本實施例的簧片120受按壓而使第一表面122從凸面變成凹面之後，一旦施加的外力移除，簧片120的彈性恢復力使簧片120迅速地復位，也就是第一表面122從凹面恢復為凸面。甚至，因為彈性部114對於簧片120的拘束較小，第一表面122有可能在凹面與凸面之間來回變換數次後才穩定地恢復為凸面，而在這期間壓電元件130都可將機械能的變化轉換為電能。Since the second side 128 of the reed 120 is fixed to the elastic portion 114 which is more susceptible to deformation, the reed 120 can easily generate a large amount of deformation when the reed 120 is deformed by being pressed. Incidentally, the piezoelectric element 130 that is deformed together with the reed 120 also converts the change in mechanical energy at the time of deformation into electric energy. Compared with the conventional technology, the both sides of the reed are fixed on the rigid base, and the reed 120 of the present embodiment can obtain a large amount of deformation under the same pressing force. After the reed 120 of the present embodiment is pressed to change the first surface 122 from the convex surface to the concave surface, once the applied external force is removed, the elastic restoring force of the reed 120 causes the reed 120 to be rapidly reset, that is, the first surface 122. Reverts from a concave surface to a convex surface. Even, because the constraint of the elastic portion 114 to the reed 120 is small, the first surface 122 may be stably returned to the convex surface after being changed back and forth between the concave surface and the convex surface several times, and during this period, the piezoelectric element 130 may be The change in mechanical energy is converted into electrical energy.
以下參照圖式說明本實施例之壓電發電器100的作動狀態變化。請參照圖2，首先，壓電發電器100處於未受力的狀態。接著在簧片120受按壓時，簧片120將會產生變形，其中第一表面122會從凸面逐漸變成平面，如圖3。然後簧片120持續受按壓而變形，第一表面122從平面變成凹面，如圖4。在此，基座110的形狀是被設計為允許簧片120在最大彈性形變時也不會碰觸到基座110，或是被設計為限制簧片120不得超出最大彈性形變範圍，以避免簧片120產生永久變形而不會復位。之後，移除按壓簧片120力量，彈性恢復力會作用在簧片120上而使簧片120開始迅速復位，第一表面122從凹面變成平面，而壓電元件130也同時產生電能，如圖5。接著，簧片120繼續復位，第一表面122從平面變成凸面，而壓電元件130也繼續產生電能，如圖6。The change in the operating state of the piezoelectric generator 100 of the present embodiment will be described below with reference to the drawings. Referring to FIG. 2, first, the piezoelectric generator 100 is in an unstressed state. Then, when the reed 120 is pressed, the reed 120 will be deformed, wherein the first surface 122 will gradually change from convex to flat, as shown in FIG. The reed 120 is then continuously deformed by pressing, and the first surface 122 changes from a plane to a concave surface, as shown in FIG. Here, the shape of the base 110 is designed to allow the reed 120 to not touch the base 110 during maximum elastic deformation, or is designed to limit the reed 120 from exceeding the maximum elastic deformation range to avoid springs. Sheet 120 produces permanent deformation without resetting. Thereafter, the force of the pressing reed 120 is removed, the elastic restoring force acts on the reed 120 to cause the reed 120 to begin to be rapidly reset, the first surface 122 changes from a concave surface to a flat surface, and the piezoelectric element 130 simultaneously generates electric energy, as shown in the figure. 5. Next, the reed 120 continues to reset, the first surface 122 becomes convex from the plane, and the piezoelectric element 130 continues to generate electrical energy, as shown in FIG.
圖7是圖2的壓電發電器發電時所產生的電壓與時間曲線圖。圖8是圖1的壓電發電器發電時所產生的電壓與時間曲線圖。以圖2的壓電發電器100與圖1的壓電發電器50進行實驗。從壓電單元130的正中央位置施加最大不超過5N的力量，以推拉力計的凸點直接按壓壓電單元130的正中央位置，力量讀值從0N開始至5N後停止並立刻移除推拉力計。採用圖2的架構的實施例及採用圖1的架構的對照例的樣品尺寸為，簧片的長度為8.5 cm，寬為4 cm，厚度為0.01 cm，材料為黃銅。壓電單元為壓電陶瓷薄片，長度為7.5 cm，寬為4 cm，厚度為0.01 cm。圖2的架構的實施例中，將原本為平板狀的簧片彎折後固定於L型基座。基座的剛性部的材料為壓克力，厚度達0.5 cm。以示波器直接連結壓電單元的正負兩極而不接其他負載，量測其電壓與時間關係圖。圖7顯示本實施例的電壓輸出波型主要有兩個循環，第一個循環的電壓半峰值最大約為12V，而第二個循環的電壓半峰值明顯較第一個循環的電壓峰值為高，為23V。反觀圖8的對照例的電壓與時間關係圖，僅出現一個上下波的循環，對照例的電壓半波峰值在5N最大力量作用下僅8V。此一比較結果顯示，由於兩端皆為剛性的固定端的對照例的簧片的剛性過強，5N這樣的微小力量無法使對照例的簧片產生大幅度的變形，以致電壓峰值明顯偏低。實施例的簧片則是一端固定於剛性部，一端連結於彈性部。在5N的力量作用下，簧片可以產生最大變形量，致使簧片上的壓電單元亦能有最大的變形量，從而得到很大的電壓輸出。Fig. 7 is a graph showing voltage versus time generated when the piezoelectric generator of Fig. 2 generates electricity. Fig. 8 is a graph showing voltage versus time generated when the piezoelectric generator of Fig. 1 generates electricity. Experiments were performed with the piezoelectric generator 100 of Fig. 2 and the piezoelectric generator 50 of Fig. 1. Applying a force of no more than 5N from the center position of the piezoelectric unit 130, the bump of the force gauge directly presses the center position of the piezoelectric unit 130, and the force reading starts from 0N to 5N and then stops and immediately removes the push-pull. Force meter. The sample size using the embodiment of the architecture of Fig. 2 and the comparative example using the architecture of Fig. 1 is that the reed has a length of 8.5 cm, a width of 4 cm, a thickness of 0.01 cm, and a material of brass. The piezoelectric unit is a piezoelectric ceramic sheet having a length of 7.5 cm, a width of 4 cm and a thickness of 0.01 cm. In the embodiment of the structure of Fig. 2, the reed which is originally a flat plate is bent and fixed to the L-shaped base. The rigid part of the base is made of acrylic and has a thickness of 0.5 cm. The oscilloscope directly connects the positive and negative poles of the piezoelectric unit without connecting other loads, and measures the voltage versus time graph. Figure 7 shows that the voltage output waveform of this embodiment has two main cycles. The voltage half-peak of the first cycle is about 12V at the maximum, and the voltage half-peak of the second cycle is significantly higher than the voltage peak of the first cycle. , is 23V. In contrast, the voltage versus time diagram of the comparative example of Fig. 8 shows only one cycle of up and down waves, and the voltage half-wave peak of the comparative example is only 8V under the action of 5N maximum force. As a result of the comparison, the reeds of the comparative example in which the rigid ends were rigid at both ends were too strong, and the small force such as 5N could not cause the reed of the comparative example to be largely deformed, so that the voltage peak was remarkably low. In the reed of the embodiment, one end is fixed to the rigid portion, and one end is coupled to the elastic portion. Under the force of 5N, the reed can produce the maximum amount of deformation, so that the piezoelectric unit on the reed can also have the largest amount of deformation, thereby obtaining a large voltage output.
圖9是圖2的壓電發電器發電時經穩壓後的電力輸出時間曲線圖。圖10是圖1的壓電發電器發電時經穩壓後的電力輸出時間曲線圖。與圖7及圖8的實驗架構基本相同，但圖9及圖10的壓電單元先連接一個整流穩壓電路後再連接示波器，其中整流穩壓電路的等效負載將近2KΩ。整流穩壓電路固定為輸出5V的直流電。圖9的結果顯示本實施例的壓電發電器所輸出的電壓在經過整流穩壓電路後可以持續輸出5V的直流電將近0.1秒，此一輸出特性足以供應許多實際生活中所需的電源供應，例如LED指示或RF無線訊號發送等。反觀圖10的對照例的電壓輸出不到0.01秒就衰落下來，難以應用在實際生活中。Fig. 9 is a graph showing the power output time after the piezoelectric generator of Fig. 2 is regulated. Fig. 10 is a graph showing the power output time after the piezoelectric generator of Fig. 1 is stabilized during power generation. The experimental structure is basically the same as that of FIG. 7 and FIG. 8 , but the piezoelectric unit of FIG. 9 and FIG. 10 is first connected to a rectifying and stabilizing circuit, and then connected to the oscilloscope, wherein the equivalent load of the rectifying and stabilizing circuit is nearly 2 KΩ. The rectifier voltage regulator circuit is fixed to output 5V DC power. The result of FIG. 9 shows that the voltage outputted by the piezoelectric generator of the present embodiment can continuously output 5 V of direct current for nearly 0.1 second after passing through the rectifying and stabilizing circuit, and this output characteristic is sufficient to supply a plurality of power supplies required in real life. For example, LED indication or RF wireless signal transmission. On the other hand, the voltage output of the comparative example of Fig. 10 fading in less than 0.01 second, and it is difficult to apply it in real life.
以下說明本發明的其他可選擇性技術方案，但本發明不侷限於此。Other alternative technical solutions of the present invention are described below, but the present invention is not limited thereto.
請參照圖2，本實施例中，簧片120被固定在基座110上時，弧形的簧片120可能已經是受力而被彎曲的狀態，也就是被施加有預應力，因此儲存有彈性位能。如此，有助於簧片120在被按壓後迅速復位。但是，也可以將簧片120設計為被固定在基座110上時處於未受力的狀態，也就是將簧片120取下而不受力的狀態時簧片120也呈現相同的弧形。此外，基座110的剛性部112具有一水平部112A與一垂直部112B，也就是剛性部112大致上呈L型。簧片120的第一側126固定於剛性部112的水平部112A。彈性部114位於剛性部112的垂直部112B。本實施例的彈性部114可以是彈簧、有機中空發泡體、感壓膠體或是由其他適當的彈性材料所構成。剛性部112的材料例如是壓克力或其他適當的剛性材料。簧片120的材料可以是銅、不鏽鋼或其他具有較大的彈性恢復力的材料。壓電元件130為陶瓷壓電元件、聚氟化二乙烯(polyvinylidene fluoride, PVDF)壓電元件或其他適當的壓電元件。本實施例的壓電元件130同時附著於第一表面122與第二表面124，具有增加輸出的電能的作用。壓電元件130的厚度例如小於等於1 mm，以避免造成簧片120不易變形。Referring to FIG. 2, in the embodiment, when the reed 120 is fixed on the base 110, the curved reed 120 may have been bent by being forced, that is, prestressed, so stored Elastic potential energy. As such, it helps the reed 120 to be quickly reset after being pressed. However, it is also possible to design the reed 120 to be in an unstressed state when it is fixed to the base 110, that is, the reed 120 also exhibits the same arc shape when the reed 120 is removed without being subjected to a force. Further, the rigid portion 112 of the base 110 has a horizontal portion 112A and a vertical portion 112B, that is, the rigid portion 112 is substantially L-shaped. The first side 126 of the reed 120 is secured to the horizontal portion 112A of the rigid portion 112. The elastic portion 114 is located at the vertical portion 112B of the rigid portion 112. The elastic portion 114 of this embodiment may be a spring, an organic hollow foam, a pressure sensitive colloid or other suitable elastic material. The material of the rigid portion 112 is, for example, acrylic or other suitable rigid material. The material of the reed 120 may be copper, stainless steel or other material having a large elastic restoring force. The piezoelectric element 130 is a ceramic piezoelectric element, a polyvinylidene fluoride (PVDF) piezoelectric element, or other suitable piezoelectric element. The piezoelectric element 130 of the present embodiment is simultaneously attached to the first surface 122 and the second surface 124, and has an effect of increasing the output electrical energy. The thickness of the piezoelectric element 130 is, for example, 1 mm or less to avoid causing the reed 120 to be less deformed.
請再參照圖4，本實施例的壓電發電器100可更包括一緩衝件140，配置於基座110上，用以避免簧片120受按壓時第二表面124直接接觸基座110而受損。此外，緩衝件140也有助於簧片120在受按壓而變形後復位。Referring to FIG. 4 again, the piezoelectric generator 100 of the present embodiment may further include a buffering member 140 disposed on the base 110 to prevent the second surface 124 from directly contacting the base 110 when the reed 120 is pressed. damage. In addition, the cushioning member 140 also helps the reed 120 to be reset after being pressed and deformed.
圖11是圖2的壓電發電器的上視示意圖。請參照圖2與圖11，本實施例的簧片120在靠近第一側126的位置具有一曲率轉折線L10。換言之，簧片120在第二側128與曲率轉折線L10之間的部分的曲率半徑不同於簧片120在第一側126與曲率轉折線L10之間的部分的曲率半徑。簧片120未受按壓時，簧片120在第二側128與曲率轉折線L10之間的部分的曲率半徑例如是小於簧片120在第一側126與曲率轉折線L10之間的部分的曲率半徑。簧片120在第一側126與曲率轉折線L10之間的部分具有在簧片120變形後提供較大的彈性恢復力的作用。此外，簧片120在靠近第二側128的位置也可以具有一曲率轉折線（未標示）。本實施例的壓電元件130位於第二側128與曲率轉折線L10之間。而簧片120在第二側128與曲率轉折線L10之間的部分的面積大於簧片120在第一側126與曲率轉折線L10之間的部分的面積。壓電元件130的面積例如大於簧片120的面積的一半。壓電元件130的面積越大，理論上輸出的電能也會越大。本實施例的簧片120大致上呈矩形，而第一側126與第二側128為短邊，如此有助於簧片120獲得較大的變形量。Figure 11 is a top plan view of the piezoelectric generator of Figure 2 . Referring to FIG. 2 and FIG. 11, the reed 120 of the present embodiment has a curvature turning line L10 at a position close to the first side 126. In other words, the radius of curvature of the portion of the reed 120 between the second side 128 and the curvature turning line L10 is different from the radius of curvature of the portion of the reed 120 between the first side 126 and the curvature turning line L10. When the reed 120 is not pressed, the radius of curvature of the portion of the reed 120 between the second side 128 and the curvature turning line L10 is, for example, less than the curvature of the portion of the reed 120 between the first side 126 and the curvature turning line L10. radius. The portion of the reed 120 between the first side 126 and the curvature turning line L10 has the effect of providing a greater elastic restoring force after the reed 120 is deformed. Additionally, the reed 120 may also have a curvature transition line (not labeled) adjacent the second side 128. The piezoelectric element 130 of the present embodiment is located between the second side 128 and the curvature turning line L10. The area of the portion of the reed 120 between the second side 128 and the curvature transition line L10 is greater than the area of the portion of the reed 120 between the first side 126 and the curvature transition line L10. The area of the piezoelectric element 130 is, for example, greater than half the area of the reed 120. The larger the area of the piezoelectric element 130, the larger the theoretically outputted electrical energy. The reed 120 of the present embodiment is substantially rectangular, and the first side 126 and the second side 128 are short sides, which helps the reed 120 to obtain a large amount of deformation.
圖12是本發明另一實施例之壓電發電器的示意圖。請參照圖12，本實施例的壓電發電器300與圖2的壓電發電器100相似，在此僅說明差異處。本實施例的基座310的剛性部312為L型板，彈性部314為一垂直板，垂直板連接L型板。基座310可以是一體成型的。簧片120的第一側126固定於剛性部312，第二側128固定於彈性部314。當然，本發明的基座的形狀還可以做其他適當變化，只要能提供簧片足夠的變形空間即可。本實施例的壓電元件330僅附著於簧片120的第一表面122。本實施例的壓電發電器300依舊可以達成輸出較大電能的目的。Figure 12 is a schematic view of a piezoelectric generator according to another embodiment of the present invention. Referring to Fig. 12, the piezoelectric generator 300 of the present embodiment is similar to the piezoelectric generator 100 of Fig. 2, and only differences will be described herein. The rigid portion 312 of the susceptor 310 of the present embodiment is an L-shaped plate, the elastic portion 314 is a vertical plate, and the vertical plate is connected to the L-shaped plate. The base 310 can be integrally formed. The first side 126 of the reed 120 is secured to the rigid portion 312 and the second side 128 is secured to the resilient portion 314. Of course, the shape of the susceptor of the present invention can be other suitable changes as long as it provides sufficient deformation space for the reed. The piezoelectric element 330 of the present embodiment is attached only to the first surface 122 of the reed 120. The piezoelectric generator 300 of the present embodiment can still achieve the purpose of outputting a large amount of electric energy.
綜上所述，在本發明的壓電發電器中，採用了具有彈性部的基座，且簧片的其中一側固定於彈性部，所以只需要較小的按壓力量就可以讓簧片產生較大的形變量，且變形持續的時間也較長。因此，壓電元件所產生的電量較大，且持續時間較長，能夠真正被應用在生活中。As described above, in the piezoelectric generator of the present invention, the pedestal having the elastic portion is employed, and one side of the reed is fixed to the elastic portion, so that only a small pressing force is required to cause the reed to be produced. Larger shape variables, and the deformation lasts longer. Therefore, the piezoelectric element generates a large amount of electricity and has a long duration, and can be truly applied in life.
雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.
50‧‧‧習知的壓電發電器
52‧‧‧簧片
54‧‧‧壓電元件
56‧‧‧基座
100、300‧‧‧壓電發電器
110、310‧‧‧基座
112、312‧‧‧剛性部
112A‧‧‧水平部
112B‧‧‧垂直部
114、314‧‧‧彈性部
120‧‧‧簧片
122‧‧‧第一表面
124‧‧‧第二表面50‧‧‧known piezoelectric generators
52‧‧‧Reed
54‧‧‧Piezoelectric components
56‧‧‧Base
100, 300‧‧‧ piezoelectric generator
110, 310‧‧‧ Pedestal
112, 312‧‧‧Rigid Department
112A‧‧‧Horizontal
112B‧‧‧Vertical
114, 314‧‧‧Flexible Department
120‧‧‧Reed
122‧‧‧ first surface
124‧‧‧ second surface
126‧‧‧第一側 126‧‧‧ first side
128‧‧‧第二側 128‧‧‧ second side
130、330‧‧‧壓電元件 130, 330‧‧‧ Piezoelectric components
140‧‧‧緩衝件 140‧‧‧ cushioning parts
L10‧‧‧曲率轉折線 L10‧‧‧ curvature turning line
圖1是習知技術的壓電發電器的示意圖。 圖2至圖6是本發明一實施例的壓電發電器的作動狀態的分解示意圖。 圖7是圖2的壓電發電器發電時所產生的電壓與時間曲線圖。 圖8是圖1的壓電發電器發電時所產生的電壓與時間曲線圖。 圖9是圖2的壓電發電器發電時經穩壓後的電力輸出時間曲線圖。 圖10是圖1的壓電發電器發電時經穩壓後的電力輸出時間曲線圖。 圖11是圖2的壓電發電器的上視示意圖。 圖12是本發明另一實施例之壓電發電器的示意圖。1 is a schematic view of a piezoelectric generator of the prior art. 2 to 6 are exploded perspective views showing an operation state of a piezoelectric power generator according to an embodiment of the present invention. Fig. 7 is a graph showing voltage versus time generated when the piezoelectric generator of Fig. 2 generates electricity. Fig. 8 is a graph showing voltage versus time generated when the piezoelectric generator of Fig. 1 generates electricity. Fig. 9 is a graph showing the power output time after the piezoelectric generator of Fig. 2 is regulated. Fig. 10 is a graph showing the power output time after the piezoelectric generator of Fig. 1 is stabilized during power generation. Figure 11 is a top plan view of the piezoelectric generator of Figure 2 . Figure 12 is a schematic view of a piezoelectric generator according to another embodiment of the present invention.
100‧‧‧壓電發電器 100‧‧‧ Piezoelectric Generator
110‧‧‧基座 110‧‧‧Base
112‧‧‧剛性部 112‧‧‧Rigid Department
112A‧‧‧水平部 112A‧‧‧Horizontal
112B‧‧‧垂直部 112B‧‧‧Vertical
114‧‧‧彈性部 114‧‧‧Flexible Department
120‧‧‧簧片 120‧‧‧Reed
122‧‧‧第一表面 122‧‧‧ first surface
124‧‧‧第二表面 124‧‧‧ second surface
126‧‧‧第一側 126‧‧‧ first side
128‧‧‧第二側 128‧‧‧ second side
130‧‧‧壓電元件 130‧‧‧Piezoelectric components
L10‧‧‧曲率轉折線 L10‧‧‧ curvature turning line
Claims (13)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104140624A TWI566511B (en) | 2015-12-03 | 2015-12-03 | Piezoelectric generator |
| CN201510974633.7A CN106849748B (en) | 2015-12-03 | 2015-12-23 | Piezoelectric generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104140624A TWI566511B (en) | 2015-12-03 | 2015-12-03 | Piezoelectric generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TWI566511B true TWI566511B (en) | 2017-01-11 |
| TW201722058A TW201722058A (en) | 2017-06-16 |
Family
ID=58407981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW104140624A TWI566511B (en) | 2015-12-03 | 2015-12-03 | Piezoelectric generator |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106849748B (en) |
| TW (1) | TWI566511B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110403294A (en) * | 2019-07-10 | 2019-11-05 | 北京三垣科技有限公司 | A kind of intelligent shoe and its sales platform and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100244629A1 (en) * | 2009-03-31 | 2010-09-30 | Ceratec Corporation | Piezoelectric Generator |
| CN202713190U (en) * | 2012-08-27 | 2013-01-30 | 杭州电子科技大学 | Piezoelectric/electromagnetic combined-type micro energy device |
| CN203968013U (en) * | 2014-08-06 | 2014-11-26 | 苏州科技学院 | Deng deformation cantilever lever piezo-electric generating assembly |
| CN104662684A (en) * | 2012-09-25 | 2015-05-27 | 裴祥喆 | Piezoelectric element for power generation and power generation device using same |
| CN204376766U (en) * | 2015-01-07 | 2015-06-03 | 浙江师范大学 | A kind of microminiature environmental protection remote controller |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005036728A2 (en) * | 2003-07-30 | 2005-04-21 | The Boeing Company | Strain energy shuttle apparatus and method for vibration energy harvesting |
| KR100930458B1 (en) * | 2007-11-12 | 2009-12-08 | 숭실대학교산학협력단 | Portable Generator Using Piezofilm |
| CN201252497Y (en) * | 2008-09-12 | 2009-06-03 | 吉林大学 | Piezoelectric self-powered low power consumption remote controller |
| CN203243249U (en) * | 2013-03-13 | 2013-10-16 | 苏州市职业大学 | Piezoelectric type capturing device of human walking energy |
-
2015
- 2015-12-03 TW TW104140624A patent/TWI566511B/en active
- 2015-12-23 CN CN201510974633.7A patent/CN106849748B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100244629A1 (en) * | 2009-03-31 | 2010-09-30 | Ceratec Corporation | Piezoelectric Generator |
| CN202713190U (en) * | 2012-08-27 | 2013-01-30 | 杭州电子科技大学 | Piezoelectric/electromagnetic combined-type micro energy device |
| CN104662684A (en) * | 2012-09-25 | 2015-05-27 | 裴祥喆 | Piezoelectric element for power generation and power generation device using same |
| CN203968013U (en) * | 2014-08-06 | 2014-11-26 | 苏州科技学院 | Deng deformation cantilever lever piezo-electric generating assembly |
| CN204376766U (en) * | 2015-01-07 | 2015-06-03 | 浙江师范大学 | A kind of microminiature environmental protection remote controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106849748B (en) | 2019-04-05 |
| TW201722058A (en) | 2017-06-16 |
| CN106849748A (en) | 2017-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107332469B (en) | A kind of piezoelectric type hospital call signal generator | |
| KR101715926B1 (en) | Vibrator and electronic device including the same | |
| US9117999B2 (en) | Piezoelectric vibration module | |
| TWI439039B (en) | Piezoelectric power generator module | |
| KR20120071767A (en) | Piezo power generator for emergency power feeding | |
| CN101764531B (en) | Multi-operation mode piezoelectric generator and power generation method thereof | |
| EP2485287A3 (en) | Bistable piezoelectric generator | |
| US20160156284A1 (en) | Power generating device | |
| KR20120093149A (en) | Mountable arm smart material actuator and energy harvesting apparatus | |
| TWI566511B (en) | Piezoelectric generator | |
| TW201635691A (en) | Piezoelectric energy harvester | |
| JP2018023214A (en) | Vibration power generator | |
| KR20150004491A (en) | Piezoelectric power generator | |
| WO2022006692A1 (en) | Self-generating device | |
| KR101061591B1 (en) | Energy harvester | |
| RU136937U1 (en) | PIEZOELECTRIC GENERATOR | |
| JP6489237B2 (en) | Piezoelectric generator | |
| Ali et al. | Investigation of hybrid energy harvesting circuits using piezoelectric and electromagnetic mechanisms | |
| US20180026554A1 (en) | Piezoelectric generator, pushbutton, radio module and method for producing a piezoelectric generator | |
| RU2623445C1 (en) | Piezoelectric cantilever-type converter of mechanical energy into electrical energy | |
| CN209982464U (en) | Key with piezoelectric induction | |
| JP6539797B1 (en) | Power generator for portable terminal | |
| KR101513202B1 (en) | Wave-force generation structure using piezoelectric element | |
| CN202586807U (en) | Key type piezoelectric switch power generation device | |
| KR101146564B1 (en) | Dielectric elastomer generation unit, independent generating apparatus for attaching at joint and independent generating apparatus for attaching at weight thing having the same |