Note: Eddy current displacement sensors independent of target conductivity.
Note: Eddy current displacement sensors independent of target conductivity.
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注意：涡流位移传感器与目标电导率无关。
DOI：
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发表时间：
2015
影响因子：
1.6
通讯作者：
Zhihua Feng
中科院分区：
文献类型：
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作者：
Hongbo Wang;Wei Li;Zhihua Feng
涡流传感器（ECS）广泛用于非接触式位移测量。在本文中，使用复杂图像方法分析了由目标电导率引起的ECS的定量误差。不同目标的ECS的响应曲线（L-x）相似，并且可以通过将曲线在x方向上移动√2δ/2来重叠。有限元分析和实验均与理论分析吻合良好，这表明高精度ECS由目标电导率引起的测量误差可以完全消除，无需校准即可精确测量不同材料。
Eddy current sensors (ECSs) are widely used for non-contact displacement measurement. In this note, the quantitative error of an ECS caused by target conductivity was analyzed using a complex image method. The response curves (L-x) of the ECS with different targets were similar and could be overlapped by shifting the curves on x direction with √2δ/2. Both finite element analysis and experiments match well with the theoretical analysis, which indicates that the measured error of high precision ECSs caused by target conductivity can be completely eliminated, and the ECSs can measure different materials precisely without calibration.