A new sensing technique for detecting micro-cracks is proposed using the grid-type circuit. The location of micro damage can be estimated based on the tendency of resistance change ratio. The construction of a well-defined grid circuit is important to reliably measure the resistances for micro-scale crack detection. Therefore, the electrohydrodynamic (EHD) inkjet printing technology is applied to build the uniform grid-type circuit. A comparison analysis with respect to the resolution of the grid pattern is conducted to estimate more accurately the location of cracks on the grid-type sensor constructed by the EHD technique. In this work, the 10⨯10 and 20⨯20 grid circuits are considered on an identical surface. By measuring the resistance variations between the two endpoints on every grid with respect to each direction, the location of cracks is estimated by a simple algorithm. Finally, the micro-crack point can be detected using the proposed sensing approach. The proposed mechanism shows the ability to accurately detect the location of cracks.

提出了一种利用网格型电路检测微裂纹的新的传感技术。可以基于电阻变化率的趋势来估计微损伤的位置。定义明确的网格电路的结构对于可靠地测量微尺度裂纹检测的电阻很重要。因此，采用电液动力学（EHD）喷墨打印技术来构建均匀的网格型电路。进行了关于网格图案的分辨率的比较分析，以更准确地估计由EHD技术构造的网格型传感器上的裂纹位置。在这项工作中，将10×10和20×20的网格电路视为在同一表面上。通过测量每个网格上两个端点相对于每个方向的电阻变化，裂纹的位置通过简单的算法估算。最后，可以使用所提出的感测方法来检测微裂纹点。所提出的机制显示了准确检测裂纹位置的能力。