The Non-destructive testing methods are important for the detection of material degradation in aerospace structures. However, it is difficult to monitor structural damages caused by aerodynamic loads, shocks and fatigue during the flight of the aircraft in real time. Therefore, conventional non-destructive inspections are usually performed at periodic maintenance checks. This paper proposes a development of a new sensing mechanism for the real-time monitoring of microscopic damage based on electrohydrodynamic (EHD) technology. Piezoelectric grid sensors were made with Ag inks and PZT/PVDF inks. The piezoelectric effect was used to observe and estimate changes in structures. The sensor formed a layered grid structure by printing uniform piezoelectric lines in the horizontal and vertical directions. The manufactured grid sensor can detect the damages of the structure through changes in resistance, and the damaged vicinity was estimated using the intersections of the resistance changes of piezoelectric lines. The proposed mechanism was found to be a powerful methodology for real-time monitoring the microscopic damages and damage evolution of structures.

无损检测方法对于检测航空航天结构中的材料降解非常重要。然而，难以实时监测在飞机飞行期间由空气动力负荷，冲击和疲劳引起的结构损坏。因此，通常在定期维护检查时执行常规的非破坏性检查。本文提出了一种基于电液动力学（EHD）技术的，用于微观损伤实时监测的新型传感机制。压电栅格传感器由Ag墨水和PZT / PVDF墨水制成。压电效应用于观察和估计结构的变化。该传感器通过在水平和垂直方向上打印均匀的压电线而形成了分层的网格结构。所制造的栅格传感器可以通过电阻的变化来检测结构的损坏，并且使用压电线的电阻变化的交点来估计损坏的附近。发现所提出的机制是用于实时监测微观损伤和结构损伤演变的强大方法。