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土壤水分含量的及时动态监测对农业生产、生态建设和科学研究均具有重要意义。基于土壤介电特性的时域反射法用于土壤水分监测方法,因应用的便捷性受到广泛关注。计算模型的构建是实现仪器信号向土壤水分信号转换的关键,从TDR方法的理论依据和仪器概要两方面论述了计算模型的重要性。从信号转换的两个过程分析了计算模型的构建和发展,即:1)土壤介电常数的测量过程,2)介电常数转换为土壤水分含量的计算过程。并讨论了影响过程监测/计算精度的主要因素,旨在为土壤水分现场快速监测技术的研究提供一定借鉴。
Abstract:Timely and dynamic monitoring of soil moisture content is of great significance to agricultural production, ecological construction and scientific research. Therefore, time domain reflectometry based on soil dielectric properties has been widely used in soil moisture monitoring because of its convenience.The construction of the calculation model is the key to realizing the conversion of instrument signals to soil moisture signals. This paper discusses the importance of the calculation model from two aspects: the theoretical basis of the TDR method and the overview of the instrument. The construction and development of the calculation model are analyzed from the two processes of signal conversion: 1) the measurement process of soil dielectric constant; 2) the calculation process to converse the dielectric constant to soil moisture content. During these two processes, the main factors affecting the monitoring/calculation accuracy were analyzed to provide some reference for the research of soil moisture monitoring technology in the field.
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基本信息:
中图分类号:S152.7
引用信息:
[1]伊芹.时域反射法监测土壤水分含量计算模型研究[J].湖北师范大学学报(自然科学版),2025,45(04):54-60.
基金信息:
国家重点研发计划资助(“海洋环境安全保障与岛礁可持续发展”重点专项2021-01)