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首页> 外文期刊>IEEE sensors journal >Water Detection Using Bi-Wires as Sensing Elements: Comparison Between Capacimetry-Based and Time-of-Flight-Based Techniques
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Water Detection Using Bi-Wires as Sensing Elements: Comparison Between Capacimetry-Based and Time-of-Flight-Based Techniques

机译：使用双线作为传感元件进行水检测：基于电容分析和基于飞行时间技术的比较

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摘要

It is known that bi-wires can be employed as passive distributed sensing elements (SEs), to accurately locate water infiltrations in soil, concrete materials, and so on, using the standard time-domain reflectometry instrumentation and proper signal processing. This paper examines the possibility of using the same kind of SEs with simpler techniques and cheaper hardware, in order to trigger an alert in the case of water infiltrations. Two techniques are examined: the first measures the SE capacitance, and the second measures the time-of-flight of electromagnetic waves in the SE. The performance of the techniques is comparatively evaluated, in terms of sensitivity to the presence of water and the influence of temperature variations. The capacitance-based technique is found to be more sensitive to the presence of water, but also more prone to the influence of temperature, as long as the temperature variations are of modest entity (below 10 °C). For higher temperature variations, the capacimetric method appears to be advantageous. The results of this paper are useful to practically implement the monitoring of water leaks in a large set of buried pipes, water infiltrations in a large concrete structure, and so on.
机译：众所周知，可以使用标准时域反射仪和适当的信号处理，将双线用作无源分布式传感元件（SE），以准确定位土壤，混凝土材料等中的水分渗透。本文研究了使用更简单的技术和更便宜的硬件使用相同类型的SE的可能性，以便在水渗入时触发警报。研究了两种技术：第一种测量SE电容，第二种测量SE中电磁波的飞行时间。根据对水的敏感性和温度变化的影响，比较了该技术的性能。发现基于电容的技术对水的存在更为敏感，但只要温度变化不大（低于10°C），也更容易受到温度的影响。对于更高的温度变化，电容法似乎是有利的。本文的结果对于在实践中实施大型埋管渗漏，大型混凝土结构中的渗水等的监测非常有用。

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