以無人飛行載具(UAV)平台探討空氣污染物之垂直分佈特徵及搭載之氣膠儀器性能評估;Investigating the vertical distribution of air pollutants by UAV platform and performance evaluation of aerosol instruments

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/81791

Title:	以無人飛行載具(UAV)平台探討空氣污染物之垂直分佈特徵及搭載之氣膠儀器性能評估;Investigating the vertical distribution of air pollutants by UAV platform and performance evaluation of aerosol instruments
Authors:	黃柏竣;Huang, Po-Chun
Contributors:	環境工程研究所
Keywords:	地球輻射收支;大氣邊界層;無人飛行載具;環境量測;微型氣膠儀器;儀器性能評估;Atmospheric boundary layer;Unmanned aerial vehicle;Environmental aerosol;Minimize aerosol instrument
Date:	2019-06-18
Issue Date:	2019-09-03 17:02:19 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究選擇適合搭載於UAV的微型氣膠儀器(混和式冷凝微粒計數器、攜帶型光學微粒計數器、PM sensor、氣膠吸收光譜儀、微型平板電移動度分析儀)進行性能評估。考慮到UAV在飛行時，環境條件(溫度、相對濕度、壓力)的變化可能會對儀器量測造成影響，因此於實驗室中，設計不同環境參數和流量評估儀器性能，試圖獲得各條件下儀器的校正曲線。結果顯示大多數所選儀器的性能均會受環境條件、量測流量、環境濃度變化而影響。表明若UAV量測數據沒有以不同條件作為考量進行修正，則量測結果會有明顯誤差。並於2018年11月15日及12月6日，利用DJI 600Pro六軸旋翼機搭載經評估後的微型儀器於台北都會區進行環境量測。期間觀測到大氣處於穩定及不穩定兩種案例。結果顯示各項污染物濃度於高空均有明顯分層的情況，可能因為風向不同所導致。當大氣轉為不穩定狀態時，發現邊界層有向上發展的現象，各污染物開始在較高的高度出現。粒徑分佈及體積分佈的結果顯示大氣中粒徑140 nm的微粒於數量上占多數，但非PM2.5的主要貢獻來源。且有發現黑碳在高空中累積，透過黑碳的光吸收指數(absorption Ångström exponent, AAE)顯示在不同高度處的碳成分不同，表明其來源可能不同，也說明大氣整體在垂直方向上為非均勻的狀態。 ;This study presents the helicopter unmanned aerial vehicle (UAV) equipped with different sensors for investigating the vertical distribution of atmospheric aerosols. High temporal and spatial resolution measurements within the first 500 m of atmosphere are presented. Five minimized instruments, including Mixing condensation particle counter, Portable optical particle counter, PM sensor, Aethalometer, parallel-plate differential mobility analyzer, were tested. The performance is calibrated under different environmental conditions. Four flights were conducted on November 15, 2018, from 11:37 pm to 12:10 pm (GMT+8) and December 6, 2018, from 09:48 pm to 10:32 pm (GMT+8). The first two flights fly up to 200 m, and the other two are up to 500 m. The cabinet with aerosol instruments was mounted at the bottom of UAV. Vertical profiles of aerosol particle number concentration, particle size distribution, black carbon mass concentration, PM2.5 were shown.
Appears in Collections:	[Graduate Institute of Environmental Engineering ] Electronic Thesis & Dissertation

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