單晶片整合之感測器節點將扮演下一代無線感測器網路應用之關鍵，其節點之系統設計中，小尺寸、長壽命、並可提供足夠功率的能源器最為關鍵，傳統蓄電池在如此嚴苛的設計條件下已不敷使用。微型能源採集器可轉換週遭環境之能源為可供網路節點所用之電能，並且不受使用壽命的限制，提供無線感測器節點之能源器可靠之解決方案。本論文提出一微型靜電能源採集系統，其由靜電能源採集器結合超級電容作為儲存裝置系統，另一方面還可提供靜電能源採集器當作電壓來源，再由降壓轉換器及調節器將電提供給無線感測器使用，剩餘的電將儲存回儲存裝置，此一系統可以自行供給能量，產生能量，以此循環。

This study proposes a micro electrostatic energy harvesting system consists of electrostatic vibration energy harvester, DC-DC buck converter, energy storage element, regulator and accelerometer applicable to wireless sensor network nodes. The goal of this study is to combine vibration energy harvester with supercapacitor and charging circuitry, where the former is as power supply and storage device for self-sustainable, self-powered applications, and the latter is for providing the desired voltage or current. Simulations show that the electrostatic vibration energy harvester resonates at 105 Hz features a compact area of 9 mm2 generating 0.88 nJ per charge-constraint cycle and accordingly output power of 0.0924 μW. Simulation of electrostatic energy harvesting system is performed with an input voltage of 6.6V, resonant frequency 105 Hz, and a variable capacitor of 19 pF using charge-constrained conversion. The proposed electrostatic energy harvesting system of this study is able to apply to wireless sensor for residential and commercial buildings.

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