大氣電場在大域電路中扮演了一個很重要的腳色，隨著不同的高度大氣電場值也隨之改變。本篇論文將著重於地表垂直大氣電場量測，並觀察大氣電場與環境因素之關係，同時探討地震前兆是否會對於電場造成擾動。此外，本篇論文也將改裝商用的電場量測儀系統，目的為廣泛的架設電場量測儀並建構出大範圍之電場監視網。
本篇論文購買由Boltek 公司所製作的電場量測儀(EFM-100)，此電場量測儀為電流型電場量測儀，設計專為地表電場之量測。其原始之架構需搭配家用電以及電腦來進行數據分析與記錄，因此若要適用於本篇論文之目的，此系統需進行改裝。改裝的重點包含(1)電力系統更換：連接家用電改為太陽能電力系統、(2)處理器更換：將電腦更換為微處理器以降低功耗及體積、(3)資料傳輸介面：從有線之光纖傳輸轉換為4G 無線傳輸、(4)製作全新結構：在較為險惡的戶外環境下保護系統免於風、雨以及日照的破壞。改裝後的電場量測儀系統也放入本團隊設計的電場校正籠與原先之系統進行比較，並將校正數據代入之後的量測結果。
改裝前之系統進行了3 個月的長時間戶外觀測，其目的為驗證購買之儀器可在戶外長時間運作且觀測電場數值之變化，而觀測結果發現電場存在日週期性之變化，推測應為日照所造成。同時也有發現，劇烈的負電場變化主要發生於降雨期間。此次觀測期間發生0206 美濃地震，在地震發生前後，電場有非常態的變化，除去降雨之因素後推測應與地震前兆有關連，但仍需大量的觀測數據與以佐證。
改裝後之系統也分別進行了兩次為期5 天的觀測，目的為驗證新的電場量測儀系統是否能進行穩定且長時間的獨立運作。兩次實驗結果展現出太陽能電力系統能有效延長系統工作時間，電場量測儀也維持穩定的量測且以無線傳輸方式將資料上傳至雲端空間。

Atmospheric electric field plays an important role in the global circuit.In addition to the fair-weather electric field, atmospheric electric field also contains turbulent electric fields which caused by blizzards, sandstorms and volcanic eruptions. Therefore, the observation of the vertical electric field on the surface can be used as an alert indicator of natural disasters to reduce damage and loss. In recent studies, atmospheric electric field is important in the coupling model of the lithosphere-atmosphere-ionosphere system. We also hope to verify the relationship between the earthquake precursor and the electric field by measuring the vertical electric field near the earth’s surface.In order to get a preliminary understanding of the vertical electric field and test the performance of the instrument field mill, we set up the instrument outdoors for long-term measurement tests.It can be observed in the measurement results thatthe vertical electric field is closely related to
precipitation.After further analysis,it was found that the electric field has diurnal variation and interesting signals were observed during the Meinong earthquake (2016/02/06). To further explore the relationship between earthquake precursors and electric fields, it is necessary to select a remote fault zone for a long-term measurement. To make the instrument more suitable for this study, the instrument is modified, including a new microprocessor, a wireless transmission system and a stand-alone power system. The upgraded instrument completed five-day outdoor tests twice and the result confirms this instrument can satisfy the requirements of the design goal.

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