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首页> 美国卫生研究院文献>SAGE Choice >Reconstruction of an informative railway wheel defect signal fromwheel–rail contact signals measured by multiple wayside sensors
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Reconstruction of an informative railway wheel defect signal fromwheel–rail contact signals measured by multiple wayside sensors

机译：重建信息丰富的铁路车轮缺陷信号多个路边传感器测量的轮轨接触信号

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摘要

Wheel impact load detectors are widespread railway systems used for measuring the wheel–rail contact force. They usually measure the rail strain and convert it to force in order to detect high impact forces and corresponding detrimental wheels. The measured strain signal can also be used to identify the defect type and its severity. The strain sensors have a limited effective zone that leads to partial observation from the wheels. Therefore, wheel impact load detectors exploit multiple sensors to collect samples from different portions of the wheels. The discrete measurement by multiple sensors provides the magnitude of the force; however, it does not provide the much richer variation pattern of the contact force signal. Therefore, this paper proposes a fusion method to associate the collected samples to their positions over the wheel circumferential coordinate. This process reconstructs an informative signal from the discrete samples collected by multiple sensors. To validate the proposed method, the multiple sensors have been simulated by an ad hoc multibody dynamic software (VI-Rail), and the outputs have been fed to the fusion model. The reconstructed signal represents the contact force and consequently the wheel defect. The obtained results demonstrate considerable similarity between thecontact force and the reconstructed defect signal that can be used for furtherdefect identification.
机译：车轮冲击载荷检测器是广泛的铁路系统，用于测量轮轨接触力。他们通常测量钢轨应变并将其转换为力，以便检测高冲击力和相应的有害车轮。测得的应变信号也可用于识别缺陷类型及其严重性。应变传感器的有效区域有限，导致无法部分观察车轮。因此，车轮冲击载荷检测器利用多个传感器从车轮的不同部分收集样品。多个传感器的离散测量提供了力的大小；但是，它不能提供更丰富的接触力信号变化模式。因此，本文提出了一种融合方法，将采集的样本与其在轮周坐标上的位置相关联。该过程从多个传感器收集的离散样本中重建信息信号。为了验证所提出的方法，已使用ad hoc多体动态软件（VI-Rail）对多个传感器进行了仿真，并将输出馈入了融合模型。重建的信号代表接触力，因此代表车轮缺陷。获得的结果表明接触力和重建的缺陷信号，可用于进一步缺陷识别。

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