電容式土壤溼度感測器讀出電路之設計與系統實現

本論文利用電容式土壤溼度感測探棒，進行其特性研究，並設計出其讀出電路。而使用的待測目標土壤設定為有機農場所使用的泥炭土，並以此為量測之基準土壤，此土壤是水苔及其他植物在濕冷環境下經多年的緩慢分解後所剩的纖維質，特性為一但乾燥後其吸水困難，時間一久其透氣性欠佳。本研究之重點將藉由感測模組中土壤濕度的不同及其對應的電容，以讀出的頻率變化完成溼度的監測。另一方面，探棒的訊號讀出電路可藉由CC2530的模擬板上的LCD Panel 呈現出土壤溼度值。目前此電容式土壤溼度感測讀出電路已具完整之雛型，電路可將不同含水量之土壤濕度（0％~30％）讀出，而實驗對照組的部分則以DECAGON公司的土壤監測儀（PRO-CHECK）搭上EC5土壤溼度探棒讀出水分與土壤容積含水率（Volumetric Water Content，％）數據做為依據。

關鍵字

精緻農業；電容式土壤溼度感器測；無線感測網路；土壤容積含水率

並列摘要

In this paper, the use of capacitive sensing soil moisture probes, conduct its research characteristics, and design its readout circuit. The focus of this research will be different in soil moisture sensing module and its corresponding capacitor to read out the complete frequency monitor humidity. On the other hand, the probe signal readout circuitry may be LCD Panel CC2530 analog board showing soil moisture values. At present, this capacitive soil moisture sensing readout circuit has a complete prototype of the circuit may be different soil moisture and moisture content (0% to 30%) is read out, while the experimental control group and partly by the DECAGON company's soil monitoring meter (PRO-CHECK) catch EC5 soil moisture probe readout volume ratio of water and soil (Volumetric Water Content,%) data as a basis.

並列關鍵字

Quality agriculture ； capacitive sensors measure soil moisture ； wireless sensor network ； volume ratio of water and soil

參考文獻

[1]楊清富（2014）。土壤水分感測技術及應用。台南區農業專訊 87期

[3]Darold Wobschall and Deepak Lakshmanan,」 Wireless Soil Moisture Sensor Based on Fringing Capacitance」 , Sensor, 2005 IEEE, ISBN：0-7803-9056-3

[4]Izhal Abdul Halin, Wan Zuha Wan Hasan, and Suhaidi Shafie, 「Soil moisture sensor and read-out circuit topology for largr array deployment」, 2009 IEICE Electronics Express, Vol.6, NO17, 1234-1239

[6]陳德如（2013）,適用於品質農業之土壤含水率監控-以微控制器為基礎，中原大學，碩士論文

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電容式土壤溼度感測器讀出電路之設計與系統實現

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