In this paper, a new structural damage detection approach is proposed, based on monitoring of the magnetic field intensity variations using smartphones. Experimental and numerical studies are conducted on steel plates to verify the efficiency of the proposed approach. Various damage scenarios are introduced to the steel plates. Then, a smartphone magnetometer sensor is deployed to measure the changes of the magnetic flux due to damage progression. The experimental and numerical results agree well with each other. Based on the results, the magnetic field intensity increases as the damage progresses. Furthermore, the damage detection accuracy declines as the distance of the smartphone increases from the steel plate surface. The proposed method can be considered as a promising, cost-effective and crowdsourcing sensing platform empowered by citizens for structural health monitoring of civil infrastructure systems.

中文翻译：

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基于智能手机磁场强度测量的新型结构健康监测方法

在本文中，基于使用智能手机监测磁场强度变化，提出了一种新的结构损伤检测方法。对钢板进行了实验和数值研究，以验证所提出方法的效率。对钢板引入了各种损坏情况。然后，部署智能手机磁力计传感器来测量由于损坏进展引起的磁通量变化。实验和数值结果相互吻合。根据结果​​，磁场强度随着损伤的进展而增加。此外，随着智能手机与钢板表面的距离增加，损坏检测精度下降。所提出的方法可以被认为是一种有前途的，