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系統識別號 U0026-1408201413123100
論文名稱(中文) 發展電場量測儀器進行地表大氣電場量測
論文名稱(英文) The Development of the Instrument Field Mill to Measure the Electric Field above Earth's Surface
校院名稱 成功大學
系所名稱(中) 太空與電漿科學研究所
系所名稱(英) Institute of Space and Plasma Sciences
學年度 102
學期 2
出版年 103
研究生(中文) 莊嘉文
研究生(英文) Chia-Wen Chuang
學號 LA6011027
學位類別 碩士
語文別 中文
論文頁數 62頁
口試委員 指導教授-陳炳志
口試委員-郭政靈
口試委員-許瑞榮
中文關鍵字 大氣電場  電場量測儀  擾動電場 
英文關鍵字 Atmospheric Electric Field  Electric Field Mill  Lightning  Thunderstorm  Precursor of earthquakes 
學科別分類
中文摘要 大氣電場在大域電路中扮演著極為重要的角色,從一般的晴天天氣到劇烈天氣,大氣電場可以有高達數個數量級的變化。因此,地表的電場量測可以做為閃電危害的預警之用。近年來的研究顯示,在岩石圈-大氣-電離層的耦合系統中,電場也扮演了重要的角色,因此地表電場量測方法的改進,對於上述問題,將可提供更多觀測上的證據。
電場量測儀其原理是藉由改變垂直電場的感測面積造成電極之感應電流變化量,以量測出電場強度。本論文的目標在於發展並自製電場量測儀,以低成本、低耗電量、小體積、不需要連接電腦、所需資源少以及容易架設做為設計目標。利用其高機動性,可望架設在偏遠地區,避免人為活動所造成的電場干擾,並逐步建構成為大範圍的即時電場監視網。
電場強度可由電極電壓訊號以及轉速訊號計算得知,因此需以適當機械結構與電路量測上述兩種訊號,並搭配中央處理器做後端數據紀錄與分析。在儀器校正方面,使用平板校正電場,在實驗室內進行此電場量測儀器之測試與校正。
量測訊號經分析後,其結果與理論相符合,也證明了此儀器可用於量測大氣電場。未來希望藉由實地量測,觀測到劇烈天氣下的擾動電場以及大氣電場之長期變化。
英文摘要 Atmospheric electric field plays an important role in the global circuit. It varies in several orders of magnitudes from the conditions of fair weather to thunderstorm or dust storm. The electric field at ground can act as an alert indicator of the possible damage caused by the severe weather. Recent studies show that the electric field also plays a significant role in the large-scale coupling between the lithosphere, atmosphere and ionosphere. Therefore, the measurement of the electric field above the ground becomes essential. In this study, we developed an instrument field mill which has the features of low cost, low power consumption, tiny size, no need to connect computers, and easy to set up, etc. With these features, we are able to construct a wide network by deploying sets of this instrument in some distant and remote sites to monitor the real-time change of the ground electric field for the studies in various research fields including the precursor of the earthquake. Finally, an outdoor experiment was conducted to show the practical measurement, and the results confirm that this field mill satisfies the requirement of the design goal.
論文目次 摘要 I
Abstract II
致謝 VI
目錄 VII
表目錄 X
圖目錄 XI
第一章 簡介 1
1.1 大域電路 1
1.2 大氣電場 2
1.2.1 晴天電場 5
1.2.2 擾動電場 7
1.3 擾動電場的成因 7
1.3.1 雷雨雲系統 8
1.3.2 地震前兆對於大氣電場之影響 10
1.4 研究動機 11
1.5 論文結構 12
第二章 靜電場量測儀介紹 13
2.1 靜電場量測方式 13
2.1.1 由電位差量測靜電場 13
2.1.2 由電流量測靜電場 14
2.2 電場量測儀原理 15
2.3 性能計算 19
第三章 結構與電路設計 21
3.1 機械結構 21
3.1.1 電場感應電極 22
3.1.2 馬達和扇葉 23
3.2 電場訊號電路設計 26
3.3 轉速訊號電路設計 34
3.4 中央處理器 36
3.5 GPS模組 38
第四章 訊號校正與戶外量測結果分析 40
4.1 校正環境 40
4.2 訊號處理 41
4.2.1 電場訊號 42
4.2.2 轉速訊號 48
4.3 儀器測試與校正 48
4.4 電場極性判斷 52
4.5 戶外量測結果 54
4.5.1 電場量測儀戶外架設 54
4.5.2 電場量測儀量測資料 55
第五章 結論與未來展望 57
5.1 結論 57
5.2 未來展望 58
參考文獻 59

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