This paper demonstrates a non-destructive method for measuring the moisture content of silage in wrapped round bales (WRBs) via microwave signals using a microstrip transmission line (MSTL) sensor and vector network analyzer under outdoor conditions. We analyzed the relationships between the amplitude changes (Δα) and phase shifts (Δφ) of the microwave-transmitted signals from the WRB surfaces without tearing their films. The press MSTL method was strongly suggested over the touch MSTL method for the non-destructive measurement of WRB qualities. We also obtained strongly negative and significant correlations between the slopes of the linear regression lines (Δφ–Δα ratios) and moisture contents for frequencies in the range of 3.6–6.2 GHz. Thus, in this frequency zone, the press MSTL method can be effectively used to determine the moisture content of silage in WRBs.

中文翻译：

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使用微带传输线传感器及其传输的微波无损检测包裹圆包中果园 (Dactylis glomerate L.) 青贮饲料中的水分含量

本文展示了一种在室外条件下使用微带传输线 (MSTL) 传感器和矢量网络分析仪通过微波信号测量缠绕圆包 (WRB) 中青贮饲料水分含量的非破坏性方法。我们分析了来自 WRB 表面的微波传输信号的幅度变化 (Δα) 和相移 (Δφ) 之间的关系，而不会撕裂它们的薄膜。对于 WRB 质量的非破坏性测量，强烈建议使用压机 MSTL 方法而不是触摸 MSTL 方法。我们还获得了线性回归线的斜率（Δφ-Δα 比率）与 3.6-6.2 GHz 频率范围内的水分含量之间的强烈负相关和显着相关性。因此，在这个频区，