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首页> 外文期刊>Advances in civil engineering >Smartphone's Sensing Capabilities for On-Board Railway Track Monitoring: Structural Performance and Geometrical Degradation Assessment
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Smartphone's Sensing Capabilities for On-Board Railway Track Monitoring: Structural Performance and Geometrical Degradation Assessment

机译：用于车载铁路轨道监控的智能手机传感功能：结构性能和几何退化评估

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摘要

Railway infrastructure managers run dedicated inspection vehicles to monitor the geometric quality of the track (among other aspects) to detect irregularities and ensure safe running conditions of railway lines, in accordance with specific regulations. Unfortunately, these inspections disturb the normal traffic operation, especially in networks with intense traffic; are generally carried out only a few times per year; and, consequently, do not provide prompt identification of critical situations. Considering the recent developments and cost reduction in sensing capabilities of smartphones, the authors present an approach to use these technologies to perform constant acceleration measurements inside in-service trains to complement the assessment of the structural performance and geometrical degradation of the tracks. Cross-correlation values above 0.85 were obtained between the standard deviations of the longitudinal level and the experimental vertical accelerations measured on-board a passenger train on an 11-km railway stretch. The results showed that the approach can be used to identify critical situations that affect the performance of the track, regarding passenger comfort, degradation rates, and risk of derailment. It may comprise a low-cost and crowdsourced complement to the general current practice of track geometric inspection by dedicated vehicles and contribute to an earlier detection of track malfunctions, consequently, to a more efficient maintenance planning and infrastructure management.
机译：铁路基础设施管理人员根据特定法规，运行专用的检查车辆来监控轨道的几何质量（以及其他方面），以发现不规则之处并确保铁路线的安全运行状况。不幸的是，这些检查扰乱了正常的流量运行，尤其是在流量很大的网络中。通常每年仅进行几次；因此，不提供紧急情况的快速识别。考虑到智能手机感应功能的最新发展和成本降低，作者提出了一种使用这些技术在服务列车内进行恒定加速度测量的方法，以补充对轨道的结构性能和几何退化的评估。在纵向水平的标准偏差与在11公里铁路段上的旅客列车上测得的实验垂直加速度之间获得了高于0.85的互相关值。结果表明，该方法可用于识别影响轨道性能的关键情况，如乘客舒适度，降级率和脱轨风险。它可以包括低成本和众包的补充，以补充当前专用车辆进行轨道几何检查的一般常规做法，并有助于更早地发现轨道故障，从而有助于更有效的维护计划和基础设施管理。

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  • 来源
    《Advances in civil engineering》 |2019年第3期|1729153.1-1729153.13|共13页
  • 作者

    Paixao Andre; Fortunato Eduardo; Calcada Rui;

  • 作者单位

    Natl Lab Civil Engn LNEC, Transportat Dept, P-1700066 Lisbon, Portugal|Univ Porto, Fac Engn FEUP, CONSTRUCT LESE, P-4200465 Porto, Portugal;

    Natl Lab Civil Engn LNEC, Transportat Dept, P-1700066 Lisbon, Portugal;

    Univ Porto, Fac Engn FEUP, CONSTRUCT LESE, P-4200465 Porto, Portugal;

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