The capacitive nondestructive technique uses a planar, two- or multi-terminal device to detect dielectric changes in its proximity. The technique has the advantages of being non-contact and requiring single-side access to the inspected test-piece. In this work, it is employed to determine the misalignment of ceramic tiles in two-dimensional array arrangements, as used for armored vehicles. Ceramic materials provide protection against projectile penetration in military and security applications. Tile assemblies are manufactured as protective add-on layers to armored vehicles. To provide effective protection, arrangements of rectangular or hexagonal tiles have to minimize potential misalignment, such as inter-tile gaps and out-of-plane mismatch. In this study, three planar capacitive probes with triangle-shaped terminals are used for the investigation of linear arrays of rectangular alumina tiles. Numerical simulations were employed to understand the probe's design parameters, as well as coupling aspects. It was found that the size of the capacitive probe and the separation between terminals provide a balance between spatial resolution, penetrability, and sensitivity to dielectric changes. Inter-tile gaps down to at least 0.5 mm, as well as out-of-plane tile misalignment as small as 0.25 mm were successfully discriminated.

电容性非破坏性技术使用平面的两端子或多端子设备来检测其附近的电介质变化。该技术的优点是非接触式，并且需要单面进入被检试件。在这项工作中，它被用来确定用于装甲车辆的二维阵列排列中瓷砖的未对准。陶瓷材料可防止军事和安全应用中的弹丸渗透。瓷砖组件被制造为装甲车辆的保护性附加层。为了提供有效的保护，矩形或六边形瓦片的布置必须使潜在的不对准（例如，砖间间隙和平面外不匹配）最小化。在这个研究中，三个带有三角形端子的平面电容式探头用于研究矩形氧化铝砖的线性阵列。使用数值模拟来了解探头的设计参数以及耦合方面。发现电容探针的尺寸和端子之间的间距在空间分辨率，穿透性和对介电变化的敏感性之间提供了平衡。瓷砖之间的间隙至少可低至0.5毫米，而面外瓷砖的未对准可低至0.25毫米。发现电容探针的尺寸和端子之间的间距在空间分辨率，穿透性和对介电变化的敏感性之间提供了平衡。瓷砖之间的缝隙至少可低至0.5毫米，而平面外瓷砖的未对准误差可小至0.25毫米。发现电容探针的尺寸和端子之间的间距在空间分辨率，穿透性和对介电变化的敏感性之间提供了平衡。瓷砖之间的缝隙至少可低至0.5毫米，而平面外瓷砖的未对准误差可小至0.25毫米。