油液污濁度檢測器之設計與改良

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姓名

陳奕里(Yi-Li Chen) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

油液污濁度檢測器之設計與改良

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至系統瀏覽論文 ( 永不開放)

摘要(中)

本研究成功建立電容式油液污濁度感測系統，具有結構簡單、直流電壓輸出、即時量測等優點，利用電容特性量測不同濃度的常見加工物質及加工低碳鋼時加工油的污濁度變化，當感測器元件浸入加工油時，會改變感測器內的介電質，接著透過電路設計轉換成直流電壓訊號並透過濾波器優化輸出訊號，可即時量測當下加工油污濁程度。藉此探討放電加工油中污濁粒子對其介電常數之影響，並利用理論計算與討論粒子濃度與加工油介電常數變化之關係。

摘要(英)

In this paper, a sensing system based on the capacitive principle to detect particle concentration in the machining oil is presented, which has the advantages of simple structure, DC voltage output, and real-time detection. Different concentration of common particles from machining and the turbidity of machining oil when machining low-carbon steel can be measured by utilizing the characteristics of capacitive sensor. When the capacitive sensor is immersed in the machining oil, the dielectric in the sensor will be changed, and the converted output of DC voltage signal will be filtered through the circuit design. Hence, we can measure the degree of turbidity of the machining oil instantly. To compare the theoretical value and experimental value, the relationship between the concentration of particle and the measurement of machining oil is discussed.

關鍵字(中)

★ 污濁度
★ 感測器

關鍵字(英)

★ turbidity
★ sensor

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 v
圖目錄 viii
表目錄 xi
第一章緒論 1
1.1 前言 1
1.2 動機 1
1.3 油液污濁度檢測技術 2
1.3.1 淤積法 2
1.3.2 光測法 3
1.3.3 電測法 4
第二章基礎理論 7
2.1 電容感測原理 7
2.2 介電常數 9
2.3 指數型混合公式 10
2.4 金屬介電常數 12
2.4.1 等效介質理論 13
2.4.2 德汝德模型 17
第三章量測電路 22
3.1 交流橋式電路 22
3.2 差動放大器 23
3.3 電路校正 25
第四章元件設計 30
4.1 感測元件之設計 30
4.2 電路板成品之設計 30
4.3 電路與感測元件之整合 31
第五章實驗架設 32
5.1 污濁度量測系統 32
5.2 放電加工常見介質之介紹 34
5.2.1 放電加工油 34
5.2.2 碳黑顆粒 34
5.2.3 鐵顆粒 35
第六章實驗結果與討論 36
6.1 碳黑顆粒量測 36
6.2 鐵顆粒量測 37
6.3 放電加工油污濁度量測 39
6.4 不同種類碳鋼之量測 41
6.5 放電加工機台上機量測 42
6.6 混合量測與分析 43
6.7 指數型混合模型分析 47
第七章結論與未來展望 50
7.1 結論 50
7.2 未來展望 50
參考文獻 51

參考文獻

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指導教授

陳世叡(Shih-Jui Chen)

審核日期

2018-11-28

推文