Implementation of wide range soil moisture profile probe by coplanar plate capacitor on film substrate
Implementation of wide range soil moisture profile probe by coplanar plate capacitor on film substrate
复制标题
薄膜基底上共面板电容器实现宽范围土壤湿度剖面探测
DOI：
10.1109/icsens.2015.7370633
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
K. Nishioka
中科院分区：
文献类型：
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作者：
Yasutomo Shirahama;Ryo Shigeta;Y. Kawahara;T. Asami;Yuki Kojima;K. Nishioka
在本文中，我们提出了一个合适的电极设计的电容传感器的低成本土壤水分剖面探头。该探针可以以相当低的成本实现，因为它只需要PET膜上的单面导电图案。虽然叉指电容器（IDC）通常用于共面电容传感器，因为它可以以足够的精度感测更宽的区域，特别是对于轮廓探针，但是优选更窄的感测区域，以便观察每个深度上的电容。共面平板电容器（CPC）由于其单间隙设计可以集中在每个剖面水平上的土壤水分，因此我们得出结论CPC应该适用于剖面探头。我们确认CPC与IDC相比具有几乎相同甚至更好的性能。除此之外，CPC还有一个优点，即与IDC相比，它具有较厚的保护涂层，灵敏度降低较少。
In this paper, we present a suitable electrode design for capacitive sensor for low-cost soil moisture profile probes. The probe can be implemented in quite low cost because it only requires single-side conductive patterns on PET film. Although inter-digital capacitor (IDC) is commonly used for coplanar capacitive sensor since it can sense wider area with sufficient accuracy, particularly for profile probe, narrower sensing area is preferred in order to observe capacitance on each depth. Coplanar plate capacitor (CPC) can focus on soil moisture on each profile level thanks to its single gap design so we conclude the CPC should be suitable for profile probes. We confirmed that CPC has almost identical or even better performance compared to IDC. In addition to that, CPC has an advantage that it has less sensitivity degradation with thick protective coating than IDC.