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Railway/Urban Rail Transit Safety Monitoring Application

Railways and rail transit are among the most important infrastructure in the country. Real-time monitoring of track health conditions is an effective guarantee for the safe operation of railway systems. Traditional electrical sensors have limitations such as poor anti-electromagnetic interference ability, limited signal transmission distance, and high costs for building sensor networks. Distributed optical fiber acoustic sensing systems integrate sensing and transmission functions, with multiple sensing units integrated on a single fiber optic cable. A single fiber optic cable can achieve long-distance, high-sensitivity, and distributed acoustic sensing detection. This technology has great application prospects in the field of railway health condition monitoring.

Perimeter Security (Third-Party Intrusion) Monitoring for Railway/Metro Lines
  1. Fence Status
    • Monitoring fence conditions on both sides of railway/metro lines
  2. Illegal Intrusion Detection
    • Monitoring illegal intrusions (theft, vandalism, etc.) on both sides of railway lines
    • Lateral distance monitoring from intrusion point to optical cable:
      • Theft within 5 meters
      • Vehicles within 10 meters
      • Digging within 20 meters
  3. Illegal Activities in Railway Safety Protection Zones
    • Monitoring illegal excavation activities
e地铁隧道入侵探测

Figure 1: Intrusion Detection in Hangzhou Subway Tunnel

2. Foreign Object Intrusion Monitoring
3. Train Operation Status Monitoring
4. Wheel-Rail Coordination Monitoring
5. Linear Karst Subgrade Health Monitoring

6. Structural Health Monitoring of Railway/Metro Tunnels:

  • On-site Environment

    On-site Environment

  • Velocity Imaging

    Velocity Imaging

  • Tunnel Wall Monitoring and Surrounding Stratum Detection

    Tunnel Wall Monitoring and Surrounding Stratum Detection

Figure 2: Dayun North Station Tunnel of Shenzhen Metro Line 21

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