Innovative optical fiber technique for soil moisture monitoring based on light intensity variation

IF 5.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-07-07 DOI:10.1007/s11440-025-02696-7

Depu Hu, De’an Sun, Qianhao Yue, Shoji Kato, Byeong-Su Kim

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引用次数: 0

Abstract

This study investigates the application of plastic optical fiber (POF) technology in geological engineering, especially for monitoring soil moisture at real-time during water infiltration. Characterized by high sensitivity and stability, POF sensors offer a new solution to accurate measurement of in-situ water contents at specific points in soils. In this study, a series of tests were first performed using a POF sensor to measure changes in light intensity with changes in the saturation degree of three types of soils with various densities. Moreover, soil column infiltration tests were conducted to simulate practical scenarios. As a result, it was confirmed that the change in light intensity detected by the POF sensor is linearly related to soil moisture. Additionally, it was found that the performance of the POF sensor allows for more detailed measurements at specific points than the widely used ECH2O EC5 soil moisture sensor. These features make the POF technology particularly useful for monitoring micro-changes in soil moisture, which are important for early landslide prediction. This study also presents significant potential for integrating the POF sensors into field applications, providing a reliable tool for disaster prevention and infrastructure safety.

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基于光强变化的土壤水分监测创新光纤技术

研究了塑料光纤（POF）技术在地质工程中的应用，特别是在水入渗过程中对土壤水分的实时监测。POF传感器具有高灵敏度和高稳定性的特点，为精确测量土壤中特定点的原位含水量提供了新的解决方案。本研究首先利用POF传感器进行了一系列试验，测量了三种不同密度土壤的光强随饱和度变化的变化。此外，还进行了土柱入渗试验，模拟实际场景。结果表明，POF传感器检测到的光强变化与土壤湿度呈线性相关。此外，研究发现，与广泛使用的ECH2O EC5土壤湿度传感器相比，POF传感器的性能允许在特定点进行更详细的测量。这些特点使得POF技术特别适用于监测土壤湿度的微小变化，这对早期滑坡预测很重要。该研究还显示了将POF传感器集成到现场应用中的巨大潜力，为灾害预防和基础设施安全提供了可靠的工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.