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研究生:朱凱隆
論文名稱:壓電式噴墨印相頭內外流場特性之量測研究
論文名稱(外文):Experimental Study of Inside and Outside Flow Fields in PZT PrintHead
指導教授:劉通敏劉通敏引用關係
學位類別:碩士
校院名稱:國立清華大學
系所名稱:動力機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:107
中文關鍵詞:壓電式噴墨頭微質點影像測速技術
相關次數:
  • 被引用被引用:3
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  • 下載下載:55
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摘 要

噴墨印相技術已經被政府列為2008年之國家重點發展工業技術之一,其應用範圍相當廣泛,例如有機發光顯示器、無版印刷電路之應用與汽機車燃油霧化器等。本文旨在建構具微米解析能力之流場觀測系統與微粒影像測速系統,以定性與定量探討商用噴墨印相頭內、外流場之特性。所建構之定性與定量系統先經由熱氣泡式噴墨液柱變化過程與微直管流速度分佈積分流量獲得精度驗證。然後本文針對現今商用壓電式噴墨印表機所驅動之噴流墨柱與墨滴演化過程以定性化觀察與定量化特徵物理量,選擇壓電式噴墨印相技術,因其可噴印對溫度敏感的高分子墨水,而相關流場量測卻未見於公開文獻中。透過電子顯微鏡(SEM)解析商用噴墨印表頭內部微結構,利用半導體與微機電製造方式製作出矩形微直管、微縮管與微擴管微流道,採用微質點影像測速技術對其內部流場進行定性與定量之研究分析。直型微管道部分,透過管流速度分佈積分流量的方式,加以驗證系統的可信度;漸縮/漸擴微流道部分,探討三種不同入口/出口寬度比值與雷諾數變化對管內速度場的影響;並改變工作流體,以比重5﹪PEO高分子粉末與去離子水混合後之高分子溶液,探討管內流場之變化。數值模擬除先提供先期設計之外,其計算結果並與實驗結果相互驗證比對。相信本研究所獲得之實驗數據,以及所歸納出的相關資訊,應能提供未來自行設計與製作微噴墨印表頭之有用參考依據。
目 錄
摘要……………………………………………………………………..Ⅰ
致謝……………………………………………………………………..Ⅲ
目錄……………………………………………………………………..Ⅳ
表目錄…………………………………………………………………..Ⅷ
圖目錄…………………………………………………………………..Ⅸ
符號說明……………………………………………………………..ⅩⅣ
第一章 緒論…………………………………………………………1
1.1 研究動機……………………………………………………….1
1.2 文獻回顧……………………………………………………….4
1.2.1 噴墨技術數值與實驗流場觀測…………………………..4
1.2.2 微流道製作………………………………………………..5
1.2.3 質點影像測速技術………………………………………10
1.3 研究目的……………………………………………………12
第二章 微米解析流場觀測實驗系統與方法………………………14
2.1 熱氣泡/壓電式驅動噴墨印相技術………………………….14
2.2 實驗系統基本原理與觀念…………………………………..16
2.3 微米解析噴墨印相技術流場觀測系統……………………..17
2.3.1 精密定位系統……………………………………………17
2.3.2 訊號同步與控制系統……………………………………18
2.3.3 光學影像擷取系統………………………………………18
2.3.4 影像處理與分析…………………………………………19
2.4 研究模型與方法……………………………………………...19
第三章 微米解析質點影像測量速度場系統之建立…………………22
3.1 基本原理與觀念……………………………………………...22
3.2 微質點影像測速系統………………………………………22
3.2.1 光學系統…………………………………………………22
3.2.2 質點顆粒的選用…………………………………………23
3.2.3 影像擷取與同步控制系統………………………………26
3.2.4 影像處理與分析系統……………………………………28
3.3 不確定度分析……………………………………………….31
第四章 微流道系統之建立……………………………………………32
4.1 商用噴墨印表頭內部微結構重現…………………………...32
4.2 微流道製作…………………………………………………...34
4.2.1 玻璃基材微流道…………………………………………35
4.2.2 矽基材微流道模具………………………………………37
4.2.3 高分子材料PDMS微流道………………………………38
4.3 工作流體之選擇……………………………………………...39
4.4 精密注射泵浦循環系統……………………………………...39
第五章 微流道數值方法………………………………………………40
5.1 計算模型尺寸與格點分佈………………………………….40
5.2 基本假設…………………………………………………….41
5.3 統馭方程式………………………………………………….41
5.4 邊界條件與起始條件……………………………………….42
第六章 結果與討論……………………………………………………44
6.1 噴墨印相技術外流場定性觀測……………………………...44
6.1.1熱氣泡驅動外流場觀測………………………………….44
6.1.2壓電式驅動外流場觀測………………………………….45
6.2 不同微流元件內部流場之定性/定量量測分析……………47
6.2.1 直管速度分佈積分流量以驗證系統之可信度…………47
6.2.2 不同入-出口寬度比值之漸縮/漸擴微管道……………48
第七章 結論與未來建議………………………………………………52
7.1 結論………………………………………………………….52
7.2 貢獻………………………………………………………….53
7.3 未來建議…………………………………………………….53
參考文獻……………………………………………………………….55
表………………………………………………………………………..61
圖………………………………………………………………………..68
作者簡介………………………………………………………………107
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