Fiber Optic Sensing Systems for Railways
HAWK's Praetorian fiber optic system is a real-time railway track monitoring system built for rail operators who can't afford blind spots. Using a single strand of fiber optic cable — often the same cable already running alongside the track — Praetorian delivers distributed acoustic sensing across up to 80km per interrogator, detecting rail deformation, cracks, intrusion, and track health as one continuous monitoring system. It can also detect the sound of locomotives, locate the train's position and speed, acting as a train detection system, and identify sound anomalies due to moderate track surface defects.
Principle of Operation
Using a combination of Rayleigh backscatter and time of flight, Praetorian fiber optic sensing for railways determines the presence, location, intensity, and frequency of vibrations along an optical fiber in real time.
Rayleigh backscatter responds to physical vibration imparted on the fiber by disturbances to the application. HAWK’s signal analysis software allows Praetorian to determine the most likely origin of the vibration quickly and report any nefarious signals to security personnel without notifying an intruder of their detection.
Applications
- Tunnel openings
- Tunnel access points
- Level crossings
- Heavy freight rail corridors
- Passenger rail corridors
- Siding yards
- Existing fiber optic communication infrastructure
- Buried or above-ground fiber installation
Industries
- Railway
Features
- Early Warning system for rail deformation monitoring
- Flat wheel detection of rolling stock
- Broken rail detection and prevention
- Washout (of ballast) detection
- Foreign objects on track (rock falls/mudslides, etc.)
- Real-time railway intrusion detection along the full length of the corridor
- Train location, speed, and count — functioning as a built-in train detection system
Praetorian fiber optic system is deployed across freight, passenger, and transit rail networks, giving railway operators, infrastructure owners, and rail network maintainers a single railway track monitoring system for both safety-critical events and day-to-day asset health. It's already protecting live rail corridors: India's NF Railway installed Praetorian along 70km of track for wildlife and intrusion detection, running incident-free since deployment.
Dimensions & Specifications
- 4RU 19" Rack Enclosure (190x600x490mm)
Contact Us to Learn More
Contact us today to learn more about our fiber optic sensing systems for railways. To request a quote for our Praetorian fiber optic sensing for railways or to learn more about other types of products we have to offer such as conveyor health monitoring systems, perimeter security and threat detection, pipeline monitoring and leak detection, and power cable monitoring, call now.
FAQs About Railway Track Monitoring
What is a railway track monitoring system?
A railway track monitoring system uses sensors — like fiber optic cable — to continuously check rail infrastructure for cracks, deformation, and intrusions. HAWK's Praetorian uses distributed acoustic sensing along existing fiber to detect issues in real time, alerting operators before failures or safety incidents occur.
How does fiber optic sensing detect rail defects?
Fiber optic sensing detects rail defects using Rayleigh backscatter: vibrations from cracks, breaks, or deformation disturb light traveling through the fiber. Praetorian's software analyzes these disturbances to pinpoint the defect's location, type, and severity along the track in real time.
Can fiber optic sensing detect intrusions on railway tracks?
Yes. Praetorian detects intrusion events — people, vehicles, animals, or debris — anywhere along a rail corridor using the vibration signature they create. It alerts security personnel with the exact location, without notifying the intruder, helping prevent collisions and unauthorized access.
How far can one fiber optic system monitor along a railway?
HAWK's Praetorian system monitors up to 80km (50 miles) of track per interrogator using a single fiber optic cable, often reusing existing railway communication fiber. This makes it a cost-effective alternative to installing sensors at fixed intervals along the corridor.
Does railway fiber optic monitoring require new cable installation?
No — Praetorian can operate over existing railway fiber optic communication infrastructure already running alongside the tracks, or new buried/above-ground fiber can be installed. This flexibility reduces deployment cost and time compared to traditional point-sensor systems.
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