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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/99217完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蘇偉儁 | zh_TW |
| dc.contributor.advisor | Wei-Jiun Su | en |
| dc.contributor.author | 王重傑 | zh_TW |
| dc.contributor.author | Chong-Jie Wang | en |
| dc.date.accessioned | 2025-08-21T16:51:02Z | - |
| dc.date.available | 2025-08-22 | - |
| dc.date.copyright | 2025-08-21 | - |
| dc.date.issued | 2025 | - |
| dc.date.submitted | 2025-08-04 | - |
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Hunstig, T. Hemsel, and W. Sextro, "Frequency tuning of piezoelectric energy harvesters by magnetic force," Smart Materials and Structures, vol. 21, no. 3, p. 035019, 2012, doi: 10.1088/0964‑1726/21/3/035019. E. F. Crawley and E. H. Anderson, "Detailed models of piezoceramic actuation of beams," Journal of Intelligent Material Systems and Structures, vol. 1, no. 1, pp. 4-25, 1990, doi: 10.1177/1045389x9000100102. Y. Huang et al., "Enhanced piezoelectricity from highly polarizable oriented amorphous fractions in biaxially oriented poly (vinylidene fluoride) with pure β crystals," Nature Communications, vol. 12, no. 1, p. 675, 2021, doi: 10.1038/s41467‑020‑20662‑7. D. Shen, J.-H. Park, J. Ajitsaria, S.-Y. Choe, H. C. Wikle, and D.-J. Kim, "The design, fabrication and evaluation of a MEMS PZT cantilever with an integrated Si proof mass for vibration energy harvesting," Journal of Micromechanics and Microengineering, vol. 18, no. 5, p. 055017, 2008, doi: 10.1088/0960-1317/18/5/055017. F. M. Foong, C. K. Thein, and D. Yurchenko, "On mechanical damping of cantilever beam-based electromagnetic resonators," Mechanical Systems and Signal Processing, vol. 119, pp. 120-137, 2019, doi: 10.1016/j.ymssp.2018.09.023. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/99217 | - |
| dc.description.abstract | 傳統的懸臂式壓電能量採集器因為彎曲變形的緣故，使得壓電材料的應變分布不均，導致發電效率低下，且具有頻寬窄的問題。為了要解決這個問題，本研究提出一種基於懸臂梁結構並搭配非線性磁力，對PVDF壓電材料進行拉伸變形的採集器結構，壓電材料僅受到軸向拉伸，因此應變分布均勻，可以有效的提升採集器的輸出電壓。此外，本結構也可以利用兩磁鐵間距離來調整系統剛性，從而實現頻率諧調。理論模型基於尤拉梁理論、壓電本構方程式及Charge Model進行推導，由於PVDF的抗彎曲剛性遠小於整體系統的剛性，因此將其視為一個等效彈簧計算。研究也針對基於懸臂梁並結合磁力之拉伸式壓電能量採集器的各項參數進行驗證，探討不同參數對採集器性能的影響，最後與懸臂式採集器互相比較，相較於懸臂式採集器，本研究所提出的採集器在最大輸出電壓為懸臂式的4.86倍，頻寬為6.62倍，經過最佳阻抗匹配後，在2.8 MΩ外接阻抗下最佳輸出功率為2.53 mW。 | zh_TW |
| dc.description.abstract | Traditional cantilever beam piezoelectric energy harvesters face challenges with uneven strain distribution in the piezoelectric material due to bending deformation, leading to low power generation efficiency and narrow bandwidth issues. To address these problems, this study proposes an energy harvester structure based on a cantilever beam combined with nonlinear magnetic force to induce tensile deformation in PVDF piezoelectric materials. The piezoelectric material is subjected to only axial tension, resulting in uniform strain distribution, which significantly enhances the output voltage of the harvester. Additionally, the structure can adjust system stiffness by varying the distance between two magnets, achieving frequency tuning. The theoretical model is derived based on Euler beam theory, piezoelectric constitutive equations, and the charge model. Since the bending stiffness of PVDF is much smaller than the overall system stiffness, it is treated as an equivalent spring in the calculations. The study validates the various parameters of the proposed tensile-mode piezoelectric energy harvester based on a cantilever beam with magnetic interaction, analyzing the impact of different parameters on the harvester's performance. Finally, the proposed harvester is compared to a conventional cantilever beam harvester. The results show that the maximum output voltage of the proposed harvester is 4.86 times that of the cantilever beam harvester, and the bandwidth is 6.62 times wider. After optimal resistance matching, the maximum output power under an external load resistor of 2.8 MΩ is 2.53 mW. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2025-08-21T16:51:02Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2025-08-21T16:51:02Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 論文口試委員會審定書 i
誌謝 ii 中文摘要 iii ABSTRACT iv 目次 v 圖次 vii 表次 xi 符號表 xii Chapter 1 緒論 1 1.1 前言 1 1.2 文獻回顧 1 1.3 研究動機及方法 8 1.4 論文架構 9 Chapter 2 壓電能量擷取理論 10 2.1 壓電效應 10 2.2 壓電本構方程式 12 Chapter 3 能量採集器理論模型 15 3.1 磁力模型 15 3.2 採集器之力學模型 17 3.2.1 質量塊受力分析 17 3.2.2 懸臂梁結構受力分析 18 3.2.3 運動方程式 23 3.3 採集器之電學模型 24 Chapter 4 實驗設計 27 4.1 原型設計 27 4.2 實驗設備 30 4.3 實驗流程 34 Chapter 5 結果驗證與討論 35 5.1 磁力模型驗證 36 5.2 模型驗證與參數對系統之影響 37 5.2.1 磁鐵間距與預拉力影響 37 5.2.2 懸臂梁厚度的影響 45 5.2.3 PVDF與懸臂梁固定端之間的距離 48 5.2.4 加速度的影響 54 5.2.5 末端質量的影響 58 5.3 與懸臂式比較之結果 62 5.4 系統功率與最佳阻抗 65 Chapter 6 結論與未來展望 67 6.1 結論 67 6.2 未來展望 68 參考文獻 69 附錄A 矩陣M係數 72 附錄B 懸臂梁應變能與撓度 73 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 非線性軟化效應 | zh_TW |
| dc.subject | 壓電能量採集器 | zh_TW |
| dc.subject | 磁力 | zh_TW |
| dc.subject | 懸臂梁 | zh_TW |
| dc.subject | 軸向拉伸 | zh_TW |
| dc.subject | axial stretching | en |
| dc.subject | cantilever beam | en |
| dc.subject | magnetic interaction | en |
| dc.subject | softening effect | en |
| dc.subject | Piezoelectric energy harvester | en |
| dc.title | 基於懸臂梁並結合磁力之拉伸式壓電能量採集器設計與分析 | zh_TW |
| dc.title | Design and Analysis of a Tensile-mode Piezoelectric Energy Harvester based on a Cantilever Beam with Magnetic Interaction | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 113-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 劉建豪;陳任之 | zh_TW |
| dc.contributor.oralexamcommittee | Chien-Hao Liu;Yum-Ji Chan | en |
| dc.subject.keyword | 壓電能量採集器,非線性軟化效應,軸向拉伸,懸臂梁,磁力, | zh_TW |
| dc.subject.keyword | Piezoelectric energy harvester,softening effect,axial stretching,cantilever beam,magnetic interaction, | en |
| dc.relation.page | 73 | - |
| dc.identifier.doi | 10.6342/NTU202503315 | - |
| dc.rights.note | 未授權 | - |
| dc.date.accepted | 2025-08-08 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 機械工程學系 | - |
| dc.date.embargo-lift | N/A | - |
| 顯示於系所單位： | 機械工程學系 | |
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