The monitoring of an IRJ would allow targeted maintenance to be carried out, reducing the problems caused by its potential failures. The authors present the results of a test field investigation, that involved the installation of seven longitudinal displacement sensors that continuously record the gap value of insulated rail joints (IRJs). The monitoring of an IRJ would allow targeted maintenance to be carried out, reducing the problems caused by its potential failures. The studied monitoring system was installed in a station of the suburban railway line within the metropolitan city of Bologna (Italy). Analysis of low-and high-frequency recordings was performed. In particular, low-frequency acquisition was used to fit a statistical predictive model that detects a deviation from a standard behaviour and may evidence anomalies. For the high-frequency acquisitions (registered during train passage) some representative quantities, that can provide macroscopic indicators of loss of joint stiffness, were computed. Although gap measurement alone is not exhaustive for identifying all possible failure scenarios, the data acquired by these monitoring devices can represent a possible immediate monitoring solution, based on already available instrumentation, to provide user-friendly predictive analysis systems aiming at improving the railway maintenance.

对 IRJ 的监控将允许进行有针对性的维护，减少其潜在故障引起的问题。作者介绍了现场测试调查的结果，其中涉及安装七个纵向位移传感器，连续记录绝缘钢轨接头 (IRJ) 的间隙值。对 IRJ 的监控将允许进行有针对性的维护，减少其潜在故障引起的问题。所研究的监控系统安装在意大利博洛尼亚大都市内的郊区铁路线上的一个车站。对低频和高频录音进行了分析。特别是，低频采集用于拟合统计预测模型，该模型检测与标准行为的偏差并可能证明异常。对于高频采集（在火车通过期间记录），计算了一些代表性量，这些量可以提供关节刚度损失的宏观指标。虽然间隙测量本身并不能详尽地识别所有可能的故障情况，但这些监测设备获取的数据可以代表一种可能的即时监测解决方案，基于现有的仪器，提供用户友好的预测分析系统，旨在改善铁路维护。