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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 舒貽忠 | |
dc.contributor.author | YEN-JEN CHEN | en |
dc.contributor.author | 陳彥禎 | zh_TW |
dc.date.accessioned | 2021-06-16T09:34:52Z | - |
dc.date.available | 2017-02-17 | |
dc.date.copyright | 2017-02-17 | |
dc.date.issued | 2017 | |
dc.date.submitted | 2017-02-13 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/59723 | - |
dc.description.abstract | 本文利用理論分析及實驗驗證,將混合陣列式系統應用於壓電振動能量擷取之特性進行深入研究及探討。
原始壓電能量擷取器始終存在兩個缺點,第一為低功率面積密度、第二為偏離共振頻時輸出大幅降低。前者由於設備尺寸限制而難以突破,後者需使用複雜的頻率協調技術才能加以改善。有鑑於此,本研究團隊致力於開發陣列式壓電系統,試圖有效提升系統功率及其頻寬。 傳統的陣列式系統(全串聯或全並聯系統)雖然於許多方面都有所提升,但我們發現,傳統陣列式系統,有效功率增幅與頻寬均勻擴增,兩種效果無法同時存在。其主因為傳統/單一的陣列配置具有峰值集中現象,系統的峰值被集中於壓電片最大或最小共振頻附近,此現象導致頻寬無法於所需範圍內均勻分布,進而使得有效頻寬變得狹窄。有鑑於此,我們有個新的想法,若我們能結合不同的單一陣列,並利用開關適時切換其組合,進而達到在所需範圍內,每個組合峰值皆能均勻分布,有助於在有效功率增幅同時均勻擴增頻寬,經過一番努力後,混合陣列式系統油然而生。 本文首先利用等效阻抗法導出系統搭配標準電路之解析解。接著找出系統最佳配置方式,探討系統最佳阻抗並做出阻抗搭配結論。最後利用四根強耦合振子進行實驗驗證,並利用實驗數據,探討系統功率增幅及其寬頻效果;除了實驗結果與理論相當吻合外,混合陣列式系統於四根振子下,功率增幅為單根振子的3.4倍,寬頻效果為傳統陣列式系統的5.7倍;最重要的是,混合陣列式系統完全改善傳統陣列式缺點,達到有效功率增幅與均勻擴增頻寬同時存在的效果。 重要的是,混合陣列式系統完全改善傳統陣列式缺點,達到有效功率增幅與均勻擴增頻寬同時存在的效果。 | zh_TW |
dc.description.abstract | The thesis aims to experimentally investigate the mixed type of array of piezoelectric oscillators used for energy harvesting. There are two inherent drawbacks for energy harvesting based on the use of a single piezoelectric oscillator. The first one is the low power area density and the second is the pronounced power reduction at off-resonance. The former is hard to be improved due to limitations in the size of devices and the latter requires sophisticated techniques of frequency tuning. This motivated the research group led by Professor Shu to develop arrays of piezoelectric energy harvesters for power boosting and bandwidth improvement. While this approach has enjoyed great success in many aspects, it is found that power enhancement and bandwidth enlargement cannot be achieved simultaneously in a single array configuration. This is because the peaks of harvested power are not uniform within the frequency range of interest. As a result, the effective bandwidth is shortened. To resolve it, an idea is to develop an array system which is able to switch the connection from parallel to series and vice versa. Thus, it is expected that both harvested power and bandwidth can be further improved.
The present thesis first proposed the use of equivalent load impedance to derive the analytic estimate of harvested power for the mixed parallel/series connection of piezoelectric oscillators. Secondly, the optimal array configurations and the optimal load impedance are discussed. Finally, the experimental validation is carried out based on the use of 4 different strongly coupled piezoelectric oscillators. The results are found to be in good agreement with the theory. In addition, the peak power of the array of mixed type is roughly 3.4 times higher than that based on the use of a single oscillator. The bandwidth of the mixed array is also improved up to 5.7 times wider than that using a single array configuration. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T09:34:52Z (GMT). No. of bitstreams: 1 ntu-106-R03543050-1.pdf: 6517328 bytes, checksum: 60bd243da684ee68890bc43ee22d60d9 (MD5) Previous issue date: 2017 | en |
dc.description.tableofcontents | 誌謝 i
中文摘要 ii ABSTRACT iii CONTENTS iv LIST OF FIGURES vii LIST OF TABLES x Chapter 1 緒論 1 1.1 研究動機 1 1.2 文獻回顧 2 1.3 論文架構 8 Chapter 2 壓電理論 9 2.1 壓電效應 9 2.2 壓電懸臂梁數學模型 10 2.2.1 雙層極性相反之壓電懸臂梁(雙層串聯) 10 2.2.2 雙層極性相同之壓電懸臂梁(雙層並聯) 17 2.3 壓電懸臂梁等效電路模型 20 Chapter 3 混合陣列式壓電系統之數學模型推導 23 3.1 CASE A :( 1st // 2nd //…//mth )+(m+1)th +…+ nth 24 3.1.1 CASE A搭載標準電路之數學模型 24 3.2 CASE B : 1st // 2nd //…//[mth +(m+1)th +…+ nth] 33 3.2.1 CASE B搭載標準電路之數學模型 33 Chapter 4 混合陣列式壓電系統特性探討 42 4.1 適當的系統組成方式 42 4.2 最佳組抗探討 46 4.2.1 系統於中弱力電耦合下之最佳阻抗探討 47 4.2.2 系統於強力電耦合下之最佳阻抗探討 50 4.3 系統最佳配置 55 4.3.1 CASE A和CASE B特性比較 55 4.3.2 新配置CASE A+B 55 4.3.3 新配置CASE A+B使用時機 59 Chapter 5 實驗驗證與分析討論 65 5.1 實驗架構與流程 65 5.1.1 夾具設計 65 5.1.2 調頻之質量塊設計 67 5.1.3 實驗流程 68 5.2 實驗儀器 69 5.3 實驗結果與討論 71 5.3.1 QA 實驗結果 72 5.3.2 KA 實驗結果 77 5.3.3 功率增幅與寬頻效果 81 Chapter 6 結論與未來展望 84 6.1 結論 84 6.2 未來展望 87 附錄A CASE A:(1st // 2nd)+3rd 搭載標準電路 88 附錄B CASE B:1st // (2nd+3rd) 搭載標準電路 94 附錄C 混合陣列式系統於不同固定阻抗下輸出比較 100 附錄D 實驗用之Labview系統介紹 101 REFERENCE 103 | |
dc.language.iso | zh-TW | |
dc.title | 混合陣列式壓電振子應用於能量擷取之實驗驗證 | zh_TW |
dc.title | An Experimental Investigation of Mixed Type of Array
of Piezoelectric Oscillators used for Energy Harvesting | en |
dc.type | Thesis | |
dc.date.schoolyear | 105-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 陳瑞琳,蘇偉?,張家銘 | |
dc.subject.keyword | 串並聯混合壓電振動能量擷取系統,陣列式壓電能量擷取系統,寬頻,功率增幅,等效阻抗法, | zh_TW |
dc.subject.keyword | Mixed parallel-series connection of piezoelectric oscillators,Array of piezoelectric energy harvesting,Wideband,power boosting,Equivalent of load impedance, | en |
dc.relation.page | 110 | |
dc.identifier.doi | 10.6342/NTU201700563 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2017-02-13 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 應用力學研究所 | zh_TW |
顯示於系所單位: | 應用力學研究所 |
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