A passive monitoring technique for switch rails will be very attractive because it does not require extra excitations and can realize large area monitoring. However, complex wheel-rail interactions and sparse sensors will affect the accuracy of local damage identification. In contrast, an active monitoring technique has high local damage quantification ability but has low efficiency for large area monitoring. This study firstly presents a combination of piezoceramic material Lead zirconate titanate (PZT) wafers with accelerometers to configure a multifunctional sensor array that brings together active and passive monitoring mechanisms. The multifunctional sensor arrays are produced in a flexible form, which are adapted to complex geometry and are easy to install. In complementary passive monitoring, each sub area’s health state between 2 accelerometers is represented by reconstructing transfer functions, which are calculated from rail vibrations. The reconstructed transfer funct...

中文翻译：

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基于被动和主动感应的基于多功能柔性传感器阵列的开关轨损坏监测

开关轨的无源监视技术将非常有吸引力，因为它不需要额外的激励，并且可以实现大面积监视。但是，复杂的轮轨相互作用和稀疏传感器将影响局部损伤识别的准确性。相反，主动监测技术具有较高的局部破坏量化能力，但对大面积监测却效率较低。这项研究首先介绍了压电陶瓷材料锆钛酸铅（PZT）晶片与加速度计的组合，以配置将主动和被动监视机制结合在一起的多功能传感器阵列。多功能传感器阵列以灵活的形式生产，适用于复杂的几何形状且易于安装。在互补的被动监控中，2个加速度计之间每个子区域的健康状态由重构传递函数表示，该传递函数是根据轨道振动计算得出的。重建的转移功能...