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Autonomous smart sensor nodes for global and local damage detection of prestressed concrete bridges based on accelerations and impedance measurements

机译：自主智能传感器节点，用于基于加速度和阻抗测量的预应力混凝土桥梁整体和局部损伤检测

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摘要

This study presents the design of autonomous smart sensor nodes for damage monitoring of tendons and girders in prestressed concrete (PSC) bridges. To achieve the objective, the following approaches are implemented. Firstly, acceleration-based and impedance-based smart sensor nodes are designed for global and local structural health monitoring (SHM). Secondly, global and local SHM methods which are suitable for damage monitoring of tendons and girders in PSC bridges are selected to alarm damage occurrence, to locate damage and to estimate severity of damage. Thirdly, an autonomous SHM scheme is designed for PSC bridges by implementing the selected SHM methods. Operation logics of the SHM methods are programmed based on the concept of the decentralized sensor network. Finally, the performance of the proposed system is experimentally evaluated for a lab-scaled PSC girder model for which a set of damage scenarios are experimentally monitored by the developed smart sensor nodes.
机译：这项研究提出了用于监测预应力混凝土（PSC）桥梁中的筋和大梁损伤的自主智能传感器节点的设计。为了实现该目的，实施以下方法。首先，基于加速度和基于阻抗的智能传感器节点被设计用于全局和局部结构健康监测（SHM）。其次，选择适用于PSC桥梁中的腱和大梁损伤监测的全局和局部SHM方法，以警告损伤发生，定位损伤并估计损伤的严重性。第三，通过实现所选的SHM方法，为PSC桥设计了自主SHM方案。 SHM方法的操作逻辑基于分散式传感器网络的概念进行编程。最后，针对实验室规模的PSC梁模型，对所提出系统的性能进行了实验评估，为此，通过开发的智能传感器节点对一组损坏情况进行了实验监视。

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