Point machines are essential to track components in railway assets that are used to operate turnouts. Conventional railway point machines (RPMs) lack continuous monitoring and feedback mechanisms, making them susceptible to malfunctions in harsh operating environments. Such failures can lead to misalignments, obstructed switching, and potentially catastrophic incidents like train collisions. This paper proposes a closed-loop technical approach to enhance the precision and safety of RPMs. The proposed closed-loop system integrates a high-resolution magnetic rotary encoder (AS5600) into the RPMs to continuously measure its actual angular position during rotation. This positional feedback is utilized in a control loop along with predefined conditions to ensure the RPMs accurately reach the desired position (normal or reverse track) for the issued command. Real-time monitoring and feedback enable precise tracking of the RPMs rotation, detection of angular misalignments, and synchronization with railway signaling to prevent unsafe conditions. Experimental results demonstrate the system's capability to pinpoint faults, reduce misalignment errors to 0.02%, and integrate RPMs operation with appropriate signaling on the main and loop lines. The proposed closed-loop solution can modernize RPMs, improving railway safety, and efficiency by prioritizing continuous monitoring and control.

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An Improved Railway Point Machine Control Mechanism for Enhancing Safety and Reliability of Rail Networks

  • Saiful Islam,
  • Abdullah Al Mamun,
  • Nazmul Islam Nahin,
  • Shuvra Prokash Biswas,
  • Rabiul Islam,
  • Rabindra Nath Shaw

摘要

Point machines are essential to track components in railway assets that are used to operate turnouts. Conventional railway point machines (RPMs) lack continuous monitoring and feedback mechanisms, making them susceptible to malfunctions in harsh operating environments. Such failures can lead to misalignments, obstructed switching, and potentially catastrophic incidents like train collisions. This paper proposes a closed-loop technical approach to enhance the precision and safety of RPMs. The proposed closed-loop system integrates a high-resolution magnetic rotary encoder (AS5600) into the RPMs to continuously measure its actual angular position during rotation. This positional feedback is utilized in a control loop along with predefined conditions to ensure the RPMs accurately reach the desired position (normal or reverse track) for the issued command. Real-time monitoring and feedback enable precise tracking of the RPMs rotation, detection of angular misalignments, and synchronization with railway signaling to prevent unsafe conditions. Experimental results demonstrate the system's capability to pinpoint faults, reduce misalignment errors to 0.02%, and integrate RPMs operation with appropriate signaling on the main and loop lines. The proposed closed-loop solution can modernize RPMs, improving railway safety, and efficiency by prioritizing continuous monitoring and control.