研究生: |
鄭名勝 Ming-Sheng Cheng |
---|---|
論文名稱: |
自動排風控制運用於大型戶外LED看板之熱管理 Automatic fan control applied on the thermal management of large-scale outdoor LED signage |
指導教授: |
林顯群
Sheam-Chyun Lin |
口試委員: |
林榮慶
黃緒哲 林顯群 |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2023 |
畢業學年度: | 111 |
語文別: | 中文 |
論文頁數: | 85 |
中文關鍵詞: | Python程式 、Modbus 、matplotlib 、軸流扇 、LED看板系統 |
外文關鍵詞: | Python, Modbus, matplotlib, axial fan, LED signage system |
相關次數: | 點閱:172 下載:6 |
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中文摘要
LED應用蓬勃發展使得戶外大型電子看板的需求與日俱增,然而市面上對於LED散熱的解決方案非常少,傳統方式都只採用冷氣機或風扇24小時運轉來達到散熱,既沒有效率也缺監控系統來確認散熱的效果;本研究對大型戶外LED看板設計從LED原理開始檢視,包含系統設計、方案挑選、散熱規劃、程式撰寫、資料蒐集到圖表繪製後,再依應用現場選取最好的解決方案來達到節能效果。本研究中以Python程式撰寫,透過介面讀取每個LED箱體的狀態,以及Modbus協定控制風扇之運轉或關閉,並蒐集箱體運作溫度統計出LED電子看板的每日溫度變化;另一方面透過環境亮度偵測來判斷風扇的啟閉需求,透過matplotlib圖表驗證初期的散熱方案是否符合實際數據,亦可藉資料整理及時發現LED箱體的異常狀態,而得以減少維修成本確保LED電子看板之正常運作。綜合而言,本研究成功地建構一套自動監測與控制的LED電子看板系統,可透過分析溫度變化來調整風扇的啟閉,現場實驗結果顯示所減少風扇運作時間可降低60%電力消耗以達到節能的效果,同時能及時提供維護資訊,值得一提者,未來此系統亦可應用於大型電子設備的散熱分析上。
Abstract
The booming of LED application leds the increasing demand for large outdoor signage. However, there are only few LED heat-dissipation solutions for this market. Usually, air conditioners or fans are adopted to operate continuously for dissipating heat, which is neither efficiency nor effective. This work focuses on the outdoor LED signage starting from examining LED principle, system design, solution selection, planning of heat dissipation requirements, program coding, data collection, and chart drawing. Then, the appropriate solution is selected according to the status of site to achieve the cooling effect under the energy-saving consideration. Furthermore, this study implements the LED control method incoportated with the Python codes to read the status from each LED cabinet through the communication interface such as RS-232 and Modbus. Thereafter, the operating temperatures from each LED cabine are analyzed to decide the fan’s on/off operation. Also, it is found that the on/off criteria of the exhausting fans can be judged through the ambient brightness detection. Additionally, the matplotlib drawings of daily temperature changes of LED signage have verified that the initial thermal/flow CFD result is roughly correlated with the actual ourcome. Moreover, the abnormal state of LED cabinet can be identified through the temperature plots easily. It saves the maintenance cost and ensure the operation of LED signage. In conclusion, this study successfully constructed a set of LED signage system with automatic monitoring and control functions, which can instantaneously adjust the fan operation by analyzing the daily temperature changes. The on-site experiment results show that the reduced fan operating time results in 60% reduction of power consumption as the energy-saving effect. Besides, the maintenance information can be provided in a timely manner for ensuring the continuous operation. It is worth mentioning that this system can also be used on thermal analysis of large electronic equipments.
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