It is important to measure the operating voltage of a cell sealed in a photovoltaic module as well as well‐known faults such as abnormal hot spots observed by thermography or a dark part in electroluminescence distribution on the module for detecting a fault module. This paper proposes a method that radiating modulated light toward a cell and extracting the synchronized signal from the module output by phase detector can estimate the operating voltage quantitatively by using a standard line predicted by shading the module partially.

中文翻译：

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建议使用调制光来估计模块中太阳能电池电压的非接触式估计的标准线的过程

测量密封在光伏模块中的电池的工作电压以及众所周知的故障（例如，通过热像仪观察到的异常热点或模块上电致发光分布中的暗部）对于检测故障模块非常重要。本文提出了一种方法，该方法向模块发射调制光并从相位检测器输出的模块中提取同步信号，可以使用部分遮蔽模块所预测的标准线来定量估计工作电压。