一种用于高速铁路转向架动态应变监测的集成无线系统。

FengLong Wang, Yating Yu, Zhiwen Luo, Lai Wei, Jing Zeng, Guiyun Tian
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引用次数: 0

摘要

转向架作为高速列车的关键承载部件,在长期运行过程中承受多向交变载荷,其动应变特性和结构完整性对运行安全至关重要。因此,对转向架进行实时动态应变监测对预测和预防高速列车事故至关重要。与传统的无损检测与评估(NDT&E)方法相比,射频识别(RFID)传感器由于其无线性能和成本效益更适合于结构健康监测(SHM)。在这里,我们提出了一种无线实时监测系统,该系统利用集成的RFID标签与微控制器和传感器模块,用于EEF转向架的实时动态应变监测。单片机将模拟信号转换为数字信号,增强了对环境干扰的抵抗能力。RFID标签无线传输数字信号到阅读器和主机。为了验证所设计系统的准确性和实时动态应变检测能力,在实验室环境和高速列车转向架现场进行了实验。实验结果验证了该系统在70 cm工作范围内的200 Hz动态应变检测能力。在600 ~ 1400 με范围内的实验室标定存在绝对误差
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An integrated wireless system for dynamic strain monitoring of Einel-rad-Einelfahrwerk bogies for high-speed rail transport.

As critical load-bearing components of high-speed trains, bogies endure multidirectional alternating loads during long-term operation, making their dynamic strain characteristics and structural integrity pivotal to operational safety. Therefore, real-time dynamic strain monitoring of bogies is essential for predicting and preventing high-speed train accidents. Compared to traditional Non-Destructive Testing and Evaluation (NDT&E) methods, Radio Frequency Identification (RFID) sensors are more suitable for Structural Health Monitoring (SHM) due to their wireless capabilities and cost-effectiveness. Here we propose a wireless real-time monitoring system that utilizes integrated RFID tags with microcontrollers and sensor modules for real-time dynamic strain monitoring of Einel-rad-Einelfahrwerk (EEF) bogies. The microcontroller converts analog signals into digital, enhancing environmental interference resistance. The RFID tags wirelessly transmit digital signals to readers and host computers. To verify accuracy and real-time dynamic strain detection capabilities of designed system, experiments were conducted in laboratory settings and on-site with high-speed train bogies. Experimental results validate the system's 200 Hz dynamic strain detection capability with a 70 cm operational range. Laboratory calibrations within 600-1400 με exhibited absolute errors <19.39 με (2.07%). On-site tests on bogies revealed absolute errors of 5.08 με (7.50%) for axle strain and 7.59 με (7.66%) for wheel hub lateral strain under operational conditions.

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