基於非準直光源的濃度偵測器之設計與研究

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姓名

江國凱(Kuo-Kai Chiang) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

基於非準直光源的濃度偵測器之設計與研究
(Design and Research on Concentration Detector with a Non-collimated Light)

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至系統瀏覽論文 (2029-8-22以後開放)

摘要(中)

傳統非光學式氣體檢測器容易受到其他氣體干擾，限制了其在特定應用中的效能。光學式氣體檢測器因其高靈敏度、快速響應和專一性等優勢，逐漸成為市場關注的焦點。然而，光學氣體檢測器的高成本限制了其普及應用。為了解決這些問題，本研究設計並研發了一種基於非準直光源的濃度偵測系統。將非準直光路設計整合到光學濃度偵測系統的架構中，旨在降低成本的同時，保持其高靈敏度、快速響應和專一性等優點。我們計劃使用可見光系統，以墨水溶液作為可行性的研究樣本，評估這種新型設計的可行性和性能。
本研究使用ASAP光追跡軟體建構系統和光源的模型並模擬光路，透過實驗量測不同濃度樣本的光穿透率。透過模擬、數學擬合與斜率分析等方式對系統的部分參數進行簡化，找出光強度與濃度的關係式，並了解系統的可工作區和限制。實驗結果表明，在10-35ppm濃度範圍內，系統能穩定測量樣本濃度，且與實際濃度的殘差小於1ppm。通過這些結果，我們證實了非準直光源應用於濃度偵測的可行性，並提出了為了應用於實際環境氣體的檢測需要做的改變，以及提升系統性能的建議。

摘要(英)

Traditional non-optical gas detectors are often limited by their susceptibility to interference from other gases, affecting their performance in specific applications. Optical gas detectors, due to their high sensitivity, rapid response, and specificity, have gained attention in the market. However, their high costs have restricted widespread use. To address these issues, this study designs and develops a concentration detection system based on a non-collimated light source. By integrating a non-collimated optical path design into the architecture of the optical concentration detection system, we aim to reduce costs while maintaining high sensitivity and fast response. We plan to use a visible light system and ink solution as a feasibility study sample to evaluate the feasibility and performance of this new design.
We used ASAP ray-tracing software to model the system and the light source, simulating the optical path and measuring the light transmittance of samples with different concentrations. By simplifying system parameters through simulation, mathematical fitting, and slope analysis, we identified the relationship between light intensity and concentration, and explored the system′s working range and limitations. Experimental results show that the system can stably measure sample concentrations in the range of 10-35 ppm, with residuals less than 1 ppm from actual concentrations. These results confirm the feasibility of using non-collimated light sources for concentration detection, and we propose changes needed for real-world gas detection applications as well as suggestions for improving system performance.

關鍵字(中)

★ 濃度偵測器
★ 非準直光源
★ ASAP
★ 數學擬合

關鍵字(英)

★ concentration detector
★ non-collimated light
★ ASAP optical engineering software
★ mathematical fitting

論文目次

中文摘要 i
ABSTRACT ii
致謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
1 第一章緒論 1
1.1 研究動機 1
1.2 文獻回顧與探討 2
1.2.1 非光學式氣體偵測器 2
1.2.2 光學式氣體偵測器(Optical gas sensor) 4
1.3 論文架構 8
2 第二章實驗原理 9
2.1 比爾–朗伯定律(Beer–Lambert law) 9
2.2 腔體中光強度的數學建模與化簡 12
2.2.1 波長項的簡化 12
2.2.2 光程項的簡化 13
3 第三章系統架構與模擬流程 16
3.1 系統架構 16
3.2 樣本配置與藍墨水的吸收光譜量測 18
3.3 基於非準直光源的光路分布模擬流程與方法 23
3.3.1 切趾法建構光源模型及量測角度能量分布 26
3.3.2 樣本濃度與光強度的模擬資料點之擬合曲線 28
4 第四章模擬與實驗結果分析 32
4.1 不同樣本濃度下穿透率的量測實驗結果 32
4.2 擬合分析與等效光程計算 33
4.3 系統性能評估與改進方向 36
5 第五章結論與展望 42
參考文獻 44

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指導教授

陳思妤(Szu-Yu Chen)

審核日期

2024-8-22

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