Strain measurement is one of the critical procedures in detecting failures and health monitoring for various structures in the field of civil engineering. This article demonstrates a smartphone-based cooperative strain measurement method called micro image strain sensing (MISS) for widespread and low-cost structural strain monitoring. The method relies on smartphones, the piston-type sensor with a microscope fitted on it, and the Android platform with cloud computing. The detailed principle of the MISS method and fabrication of the MISS sensor and the comparison of measurement accuracy with fiber Bragg grating sensor are presented. The results show that the error is within 10 με., which satisfies the engineering requirement, and the sensor exhibits high flexibility, high reliability, and high linearity. The work highlights the potential of widespread usage and public participation in smartphone-based strain measurement for the structural health monitoring of the next generation.

中文翻译：

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基于不同智能手机协同操作的应变测量

应变测量是土木工程领域各种结构失效检测和健康监测的关键程序之一。本文展示了一种基于智能手机的协同应变测量方法，称为显微图像应变传感 (MISS)，用于广泛且低成本的结构应变监测。该方法依赖于智能手机、装有显微镜的活塞式传感器以及具有云计算功能的 Android 平台。介绍了 MISS 方法的详细原理和 MISS 传感器的制造以及与光纤布拉格光栅传感器的测量精度比较。结果表明，误差在10με以内，满足工程要求，传感器具有高灵活性、高可靠性和高线性度。