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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：智能手机对车载铁路轨道监控的传感能力：结构性能和几何降解评估

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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经营专用检测车辆来监测轨道（等方面）的几何质量，以检测违规行为，并确保符合具体规定的铁路线路的安全运行条件。不幸的是，这些检查干扰了正常的交通运行，特别是在具有强烈交通的网络中;通常每年仅进行几次;因此，不提供迅速识别危急情况。考虑到最近的智能手机传感能力的发展和成本降低，提交人提出了一种利用这些技术在维修培训中执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劣化的评估。在纵向水平的标准偏差和在11公里的铁路伸展时测量的乘客列车的标准偏差和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，了解乘客舒适，退化率和脱轨风险。它可以包括专用车辆轨道几何检测的一般目前实践的低成本和众所周心的补充，并有助于更早地检测跟踪故障，从而实现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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