隨著無線感測器網路(Wireless Sensor Network ,WSN)技術越來越發達，獵能器技術的研發將使得WSN發展做一大躍進，而電源體積的微小化，將使得獵能器本身工作頻率提高與效能降低，因此我們將設計一低頻高磁能獵能器，並針對獵能器的適用性與發電效率做改進。首先，本論文設計低彈簧常數(Low-K)系統代替一般懸臂樑式結構研製低頻獵能器，用以解決獵能器工作頻率普遍偏高的問題；此外，為了有效的提高發電效率，本研究以磁路設計的方法，使空間中發散的磁通量往獵能器工作氣隙方向聚攏，使得線圈在高磁能環境下作動，以達到增強發電效率之目的。本論文利用模擬軟體分析磁場配置，採用磁極相對的方式包圍一線圈，使線圈得以沉浸在聚攏的磁力場之中，當外界振動時即牽動彈簧系統連結之線圈，切割磁力線即產生感應電流。由實驗結果顯示，在未附加任何導磁體時，系統在共振頻率13Hz有輸出電壓值 319 mV；當獵能模組加裝導磁結構時，其輸出電壓提升至852mV，發電功率為21.3mW，在相同試驗環境下，加裝導磁結構之獵能模組發電量約為傳統獵能結構之2.67倍。

In this thesis, a prototype low frequency electromagnetic harvester device is fabricated which is using concept of high magnetic power. This prototype device is established based on the design of low frequency structure, the magnetic field analysis, and magnetic circuit design. That will make the magnetic flux concentration into the gap from the magnetic field design. By the way, the electromagnetic harvest device is consisted of a copper coil of 11 mm thickness, two steel (SUS316) suspension springs with low-k coefficient and four commercially available neodymium iron boron (NdFeBN35) magnets of dimension 20 mm × 10 mm × 4 mm. The size of the electromagnetic harvest device is 25mm × 20mm × 6 mm. According to the Faraday's law, when an external force is exerted on the system, the spring has the relative motion to the inertia mass, the magnetic flux is changed and the current is induced. The experiment result reveals that when its resonant frequency is designed at 13 Hz, a voltage value of 319 mV and the average generator power is 7.975mW. After the magnetic circuit design, the output power increase about 267% than traditional electromagnetic harvester at the same resonant frequency.

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