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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李允中 | |
dc.contributor.author | Chun-Chien Chang | en |
dc.contributor.author | 張竣傑 | zh_TW |
dc.date.accessioned | 2021-06-08T06:07:54Z | - |
dc.date.copyright | 2007-07-20 | |
dc.date.issued | 2007 | |
dc.date.submitted | 2007-07-18 | |
dc.identifier.citation | 1. 王振裕。1993。微電腦控制農產品重量選別機秤量系統之設計與研究。碩士論文。臺北:台灣大學農業機械工程學系研究所。
2. 沈德欽。1989。農產品重量選別裝置與微電腦系統之研究。碩士論文。臺北:台灣大學農業機械工程學系研究所。 3. 金衡模。1992。微處理機控制農產品重量選別機之設計研究。碩士論文。臺北:台灣大學農業機械工程學系研究所。 4. 張哲維。2007。重量選別機量測系統動態分析。碩士論文。臺北:台灣大學生物產業機電工程學系研究所。 5. 盧明智,黃敏祥。2004。OP Amp應用+實驗模擬。台北。全華科技圖書股份有限公司。 6. Halimic M. and W. Balachandran.1995.Kalman Filter for Dynamic Weighing System. Proceedings of the IEEE International Symposium. Vol(38):786-791. 7. Halimic M.,W. Balachandran and Y. Enab.1996.Fuzzy Logic Estimator for Dynamic Weighing System. IEEE Transactions on Instrumentation and Measurement. Vol(3): 2123-2129. 8. Halimic M., W. Balachandran. and F. Cecelja. 2003. Enhanced Adaptive Network Fuzzy Inference System in Checkweighing Systems Performance Improvement. IMTC '03-Instrumentation and Measurement Technology Conference, Vol(2):1094-1097. 9. Halimic M., W. Balachandran, M. Hodzic and F. Cecelja. 2003. Performance Improvement of Dynamic Weighing Systems Using Linear Quadratic Gaussian Controller. IMTC 2003 - Instrumentation and Measurement Technology Conference. Vol(2):1537-1540. 10. Jafaripanah M., M.A. Bashir, and N. M. White.2005.Application of Analog Adaptive Filters for Dynamic Sensor Compensation.IEEE Transactions on Instrumentation and Measurement.Vol(54):245-251. 11. Maier R., and S.Gunther.1989.Integrated Digital Control and Filtering for an Electrodynamically Compensated Weighing Cell. IEEE Transactions on Instrumentation and Measurement. Vol(38):998-1003. 12. Shu W.Q.1993. Dynamic Weighing Under Nonzero Initial Conditions. IEEE Transactions on Instrumentation and Measurement. Vol(42):806-811. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/25290 | - |
dc.description.abstract | 蔬果重量分級機是蔬果集貨包裝場中最常見的機器。雖然應用荷重元等電子式重量秤重商品很多,但在台灣電子式的蔬果重量分級機仍很少見。因重量分級機機構原件的運動與機台之振動嚴重影響到重量動態量測精準度。本論文中,在裝置荷重元為重量感測器的蔬果重量選別機進行動態量測。量測所得訊號作快速傅立葉轉換,識別出實際重量訊號分佈於1Hz∼15Hz;而機台振動雜訊分佈於30Hz附近。研究中使用以下兩種方法以改善動態量測誤差。首先,使用電路模擬軟體Multisim模擬並設計雙T電橋帶拒濾波器,其濾波截止頻率為30Hz,利用電阻電容與運算放大器等原件實現雙T電橋帶拒濾波器再裝置於動態量測系統進行實驗。實驗結果發現,高品質因數(Q=0.65)帶拒濾波器有最佳的量測誤差改善結果,其動態量測誤差可改善至±5%以內。第二種方法是利用Simulink模式設計反摺機濾波器。在Simulink環境下模擬並實現動態量測輸出訊號經反摺積濾波器的濾波結果。利用數位低通濾波器將輸出訊號作平滑化處理以過濾輸出訊號中的高頻雜訊,再將平滑化後的訊號輸入至反摺積濾波器作濾波處理。濾波結果發現,反摺積濾波器可將動態量測誤差改善至±2%的動態量測誤差,此性能可以滿足商用蔬果重量分級機的需求。 | zh_TW |
dc.description.abstract | Weighting sorter is one of the most popular machinery found in produce packers. Although load cell has been commercially applied in weight measurement for a long time, but in Taiwan it is still limited to be used in produce weighting sorter. Noise occurred by movement of mechanical elements and vibration of frame of the sorter greatly interference the weight measurement accuracy. In the thesis, by the use fast Fourier transform for the dynamic measurement signals of the load cell in a commercial sorter were identified as weighting signals distributed from 1 to 15Hz and the vibration noise mainly around 30Hz. Two methods were then implied to reduce the vibration noise in order to decrease the dynamic measurement error. First, a commercial software Multisim was used to simulate and design Twin-T band reject filters with cut-off frequency at 30Hz, filters were then realized through RC and Op-Amps circuits and were examined in dynamic measurements. The high quality Twin-T band reject filter with Q=0.65 gave the best results, the dynamic measurement error were lowered to ±5%. The second approach was to design a deconvolution filter using Simulink schema. Based on the dynamic response of the measurement system a deconvolution filter was simulated and materialize in the Simulink environment. The dynamic measurement signals were first digitally smoothed to eliminate high frequency noise and then processed with the deconvolution filter. With these process the dynamic measurement error were lowered to ±2 %, that is fairly acceptable in the commercial measurement for a produce weighting sorter. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T06:07:54Z (GMT). No. of bitstreams: 1 ntu-96-R93631025-1.pdf: 771535 bytes, checksum: 43b45afdd520710eae2e49c947ec2a9c (MD5) Previous issue date: 2007 | en |
dc.description.tableofcontents | 誌謝 i
摘要 ii ABSTRACT iii 目錄 v 圖目錄 viii 表目錄 xi 符號說明 xii 第一章 前言與研究目的 1 1.1 前言 1 1.2 研究目的 2 第二章 文獻探討 3 2.1 水果重量選別機 3 2.2 傳統濾波器(Conventional Filter) 3 2.3 有限脈衝響應濾波器 4 2.4 反摺積濾波器(Deconvolution Filter) 5 2.4.1 類比自適應濾波器(Analog Adaptive Filter) 6 2.4.2 數位反摺積濾波器(Digital Deconcvolution Filter) 9 2.5 Kalman 濾波器 10 2.6 模式估測的濾波方法 12 2.7 自適應反摺積估測 13 2.8 智慧型濾波器 14 2.8.1 模糊邏輯估測器 14 2.8.2 類神經網路 15 2.8.3 模糊類神經網路 15 2.9 結合位置控制與濾波器 16 第三章 材料與方法 18 3.1 實驗設備 18 3.2電子式重量選別機重量動態量測試驗 21 3.3重量選別機量測系統改善 23 3.4分析用訊號的擷取與分析 23 3.5雙T電橋帶拒濾波器之設計、模擬與實驗 24 3.6反摺積濾波器之設計與模擬 29 第四章 結果與討論 32 4.1系統分析 32 4.1.1初步試驗 32 4.1.2動態量測訊號與秤重主頻率分析 37 4.1.3靜態量測的輸出電壓 37 4.1.4動態量測輸出訊號與機構振動主頻率分析 40 4.2雙T電橋帶拒濾波器設計與模擬 41 4.2.1低品質因數帶拒濾波器電路模擬 42 4.2.2高品質因數帶拒濾波器電路模擬 44 4.2.3帶拒濾波器實測結果與分析 45 4.2.4穩態訊號 46 4.3反摺積濾波器之模擬與動態量測 52 4.3.1平滑化處理 52 4.3.2重量選別機之荷重元參數 53 4.3.3 Simulink模擬動態量測輸出訊號與濾波結果 54 4.3.4反摺積濾波器應用於動態量測系統 57 4.3.5反摺積濾波器方法動態量測系統性能分析 58 4.4機構改良、雙T電橋濾波器與反摺積濾波器等方法之性能比較 63 4.4.1雙T電橋帶拒濾波器與反摺積濾波器方法性能比較 63 4.4.2機構改良方法與反摺積濾波器方法之性能比較 65 第五章 結論與建議 68 參考文獻 69 附錄 71 | |
dc.language.iso | zh-TW | |
dc.title | 重量選別機重量量測系統性能之改良 | zh_TW |
dc.title | Performance Improvement of Weighing System for a Weighing Sorter | en |
dc.type | Thesis | |
dc.date.schoolyear | 95-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 謝志誠,江昭皚 | |
dc.subject.keyword | 重量分級機,雙T電橋帶拒濾波器,反摺積濾波器,動態量測誤差, | zh_TW |
dc.subject.keyword | weighing sorter,Twin-T band reject filter,deconvolution filter,dynamic measurement error, | en |
dc.relation.page | 74 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2007-07-19 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 生物產業機電工程學研究所 | zh_TW |
顯示於系所單位: | 生物機電工程學系 |
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