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研究生:張誌峰
研究生(外文):Chang, Chi-Fong
論文名稱:高功率LED車頭燈之設計
論文名稱(外文):Design of High Power LED Headlight for Motor Vehicles
指導教授:謝忠祐 博士蔡國銘 博士
指導教授(外文):Dr. Hsieh, Chung-YuDr.Tsai, Kuo-Ming
學位類別:碩士
校院名稱:國立勤益科技大學
系所名稱:機械工程系
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:2011
畢業學年度:99
語文別:中文
論文頁數:80
中文關鍵詞:TIRLED汽車頭燈鏡片設計照度光型
外文關鍵詞:Total Internal ReflectionLED vehicles headlightLens designIlluminanceLight pattern
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本研究主要為新式LED汽車頭燈之設計與製作。研究中使用ZEMAX設計LED照明用之全反射(Total Internal Reflection, TIR)透鏡,並使用LightTools分析LED的光路與照度分佈等光學性質,探討不同的TIR結構設計對光通量、照度之影響,並優化TIR透鏡的曲面設計。以優化設計之尺寸製作模具及射出成型實驗,由模擬結果顯示加入TIR透鏡後可使LED的最大照度提升25.5倍,平均照度提升4倍;而由實驗結果可知最大照度在加入TIR透鏡後也有提升16倍以上。在使用LED陣列並搭配TIR透鏡組裝成汽車頭燈,依據聯合國歐洲經濟執委會(United Nations Economic Commission for Europe, ECE) R112規範進行量測其照度分佈與光型。光型方面,在TIR透鏡前方放置光型片與聚焦透鏡,並調整聚焦透鏡與TIR透鏡之間距後,可符合規範之25 m接收面左半部水平,右半部上揚15°之近光燈光型,而遠光燈則需移除光型片與聚焦透鏡方能達到規範之照度;照度方面,由結果可知近光燈之照度在接收面中心點右側750 mm,下方375 mm處略低於規範為0.13 Lux,在接收面中心點左側1500 mm,上方250 mm點的照度高於規範值為0.25 Lux,而其他量測點均符合法規。另外,遠光燈在接收面中心點的照度為30.8 Lux,較規範值低1.2 Lux,其他量測點則均符合規範。
In this study a novel LED vehicles headlight was designed and fabricated; a commercial software packages, ZEMAX, was used to design the TIR (Total Internal Reflection) lens for the LED light-wares, and LightTools was used to implement optical simulations such as ray-tracing and illuminance patterns of the LED module to investigate the effect of different TIR lens designs on the luminous flux and illuminance of the lighting and to optimize the surface of the TIR lens. The optimized model was used to fabricate optical molds to implement injection molding experiments; the comparison between empirical and simulation results revealed that the maximum illuminance was increased by 25.5 times and the average illuminance was increased by 4 times; the experimental result further indicated that after adding TIR lens the maximum illuminance was increased by 16 times or higher. For the LED-array headlight with TIR lens, the illuminance and light pattern measurements conformed the United Nations Economic Commission for Europe, ECE, R112 Specifications. The light pattern at a reception plane 25m from the light source for passing beam with focusing lenses at the TIR lenses conformed to the specs where the lighting boundary is horizontal at the left half of plane and a 15° slope upward at the right half of plane. For driving beam, the collimating plate and the focusing lenses must be removed to produce the desired light pattern The measurement data for the illuminance of the passing beam met the standard specs except for a point 750 mm to the right of the center and 375 mm down the center of the reception plane where a low 0.13 Lux was found, and a point 1500 mm to the left of the center and 375 mm up the center of the reception plane where a higher 0.25 Lux was found. The measurement data for the illuminance of the high-lights met the standard specs except for the point at the center of the reception plane where the illuminance was 30.8 Lux, lower than the standard by 1.2 Lux.
摘要
ABSTRACT
目錄 I
圖目錄 III
表目錄 VII
符號索引 VIII
第一章 緒論 1
1-1 前言 1
1-2 研究動機 3
1-3 研究流程 3
1-4 文獻回顧 6
1-5 本文架構 9
第二章 理論基礎 10
2-1 斯涅爾定律(Snell’s law) 10
2-2 光度學單位 11
2-3 蒙地卡羅光跡追蹤(Monte-Carlo ray tracing) 15
2-4 斯派羅準則(Sparrow criterion) 16
2-5 汽車頭燈近光燈法規 19
2-6 汽車頭燈遠光燈法規 20
第三章 研究規劃 22
3-1 TIR透鏡設計 22
3-2 測量設備 32
3-3 研究材料 38
第四章 結果與討論 39
4-1 單顆LED光學性質模擬分析 39
4-2 TIR透鏡各階段之光通量分析 40
4-3 TIR透鏡各階段之照度分析 42
4-4 單顆LED含夾具之光學性質分析 49
4-5 TIR透鏡變形模擬分析 49
4-6 三顆LED陣列含TIR透鏡之驗證 54
4-7 光型模擬結果 56
4-8 近光燈在25 m處之結果 61
4-9 遠光燈在25 m之結果 65
第五章 結論 72
參考文獻 73
附錄 78


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