基于灵敏度增强的多端口网络的润滑油水分检测传感器

IF 4.5 1区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2024-12-11 DOI:10.1109/TMTT.2024.3492186

Kai Wan;Jie Huang;Xingchuan Liu;Shuyan Zhu

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引用次数: 0

摘要

本文提出了一种集成了干扰电路的多端口网络微波传感器，用于检测润滑油中的水分，以提高相敏性。首先，开发了一种基于复合右/左手（CRLH）传输线（TLs）的传感元件，以携带以传输相位变化为特征的水分含量信息。然后，将差分配置的两个基于CRLH tls的传感元件集成到干扰电路中，研究干扰电路中混合耦合器的耦合系数，分析参考支路和传感支路之间的功率分配比，从而获得输出相敏增强。然后，通过多端口电路将干扰电路的输出相位转换成功率读数，分析它们之间的对应关系，并利用它们来估算润滑油中的水分含量。最后，开发了一个基于labview的实时测量系统，用于表征体积分数为0.2% ~ 15%的润滑油中的水分含量。测量结果表明，与基于CRLH tls的传感元件本身相比，相灵敏度从1.03°/(v%)提高到3.82°/(v%)。理论分析和实验结果验证了基于多端口网络拓扑结构的灵敏度增强方案。

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Sensitivity-Enhanced Multiport-Network-Based Sensor for Moisture Detection in Lubricant Oil

In this article, a multiport-network-based microwave sensor integrated with an interference circuit is proposed to detect the moisture content in lubricant oil for the purpose of phase-sensitivity enhancement. First, a composite right-/left-handed (CRLH) transmission lines (TLs)-based sensing element is developed to carry moisture content information characterized by a change in the transmission phase. Then, two CRLH TLs-based sensing elements in the differential configuration are integrated into an interference circuit, and the coupling coefficients of the hybrid coupler in the interference circuit are investigated to analyze the power distribution ratio between the reference and sensing branches and obtain an output phase-sensitivity enhancement. Subsequently, the output phase from the interference circuit is translated into power readings through the multiport circuit, and then the corresponding relationship between them is analyzed and utilized to estimate the moisture content in lubricant oil. Finally, a LabVIEW-based real-time measurement system is developed to characterize the moisture content in lubricant oil with the volume fraction from 0.2% to 15%. The measured results exhibit an improvement in phase sensitivity from 1.03°/(v%) to 3.82°/(v%) compared to the CRLH TLs-based sensing elements itself. Both theoretical analysis and experimental results validate the sensitivity enhancement scheme by use of a multiport-network-based topological structure.

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来源期刊

IEEE Transactions on Microwave Theory and Techniques 工程技术-工程：电子与电气

CiteScore

8.60

自引率

18.60%

发文量

486

审稿时长

6 months

期刊介绍： The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.