In this study, we investigated an annular flexible eddy current array sensor for quantitative monitoring of cracks in ferromagnetic steels under varying loads and temperatures. First, the sensor was designed to monitor the length of cracks in ferromagnetic materials. Using numerical simulations, the effects of permeability, lift-off distance, and conductivity on the response of the sensor were studied. Simulation results showed that when the rate of increase in conductivity and the decrease in permeability were the same, it had the same effect on the trans-impedance response of the sensor. Based on this relation, a new sensor with a reference channel was proposed. At the same time, a new signal, Δ P , for ferromagnetic materials was defined to improve sensitivity to the cracks and to remove the influence of temperature variations. Then, simulated crack-monitoring experiments were carried out to verify the sensitivity of the new sensor. The results showed that the sensitivit...

中文翻译：

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环形柔性涡流阵列（A-FECA）传感器，用于定量监测在变化的载荷和温度下铁磁钢中的裂纹

在这项研究中，我们研究了一种环形柔性涡流阵列传感器，用于定量监测在变化的载荷和温度下铁磁钢中的裂纹。首先，该传感器被设计为监视铁磁材料中裂纹的长度。使用数值模拟，研究了磁导率，剥离距离和电导率对传感器响应的影响。仿真结果表明，当电导率的增加速率和磁导率的降低速率相同时，它对传感器的跨阻抗响应具有相同的影响。基于这种关系，提出了一种具有参考通道的新型传感器。同时，为铁磁材料定义了一个新信号ΔP，以提高对裂纹的敏感性并消除温度变化的影响。然后，进行了模拟裂纹监测实验，以验证新传感器的灵敏度。结果表明，敏感性...