Transport Infrastructure
Monitoring & Security
Continuous vibroacoustic monitoring of railways, metro lines, tunnels, highways, bridges, airfields, and S&T/telecom fiber corridors up to 65 km per arm (up to 130 km on two channels) with K-DAS (RKCP, Kazakhstan)
A single spare fiber in your existing telecom or S&T cable as a continuous sensor array along transport corridors
Mainline railways, metro tunnels, high-speed highways, bridges, and airport runways operate under continuous dynamic loads and require 24/7 operational safety and security oversight. Instrumenting hundreds of kilometers of track or roadway with discrete point sensors, cameras, and power distribution lines is prohibitively expensive and creates thousands of field failure points. The K-DAS distributed acoustic sensing system connects to a single spare ITU-T G.652 single-mode fiber inside an existing wayside telecom or signaling cable and turns every 1.6–10 meters of the corridor into a real-time vibroacoustic channel over distances up to 65 km per single arm (up to 130 km across two channels) from a single interrogator.
Engineered and manufactured in the Republic of Kazakhstan by Ksense LLP and listed in the official Register of Kazakhstani Commodity Producers (RKCP), K-DAS requires zero field power along the route. Because the wayside sensing element is a pure quartz glass dielectric, it is completely immune to severe electromagnetic interference from 25–27.5 kV AC overhead catenary lines, traction substations, rail return currents, and lightning strikes. A single system simultaneously tracks trains and road traffic, detects wheel flats and rolling stock defects in motion, protects S&T and backbone fiber cables against excavation and theft, and monitors geohazards at tunnel portals and bridge approaches.
- Spare G.652 Fiber
Without Track WorkConnects directly to one dark ITU-T G.652 fiber inside your existing wayside telecom or signaling cable with zero trenching, zero track possessions, and no dedicated specialty sensing cable. - Live Train & Wheel
Anomaly TrackingTracks train position, speed, and consist length continuously without blind spots while automatically flagging wheel flats, seized brakes, and dragging equipment in real time. - S&T & Telecom Line
Cut PreventionDetects excavators, HDD rigs, manual digging, manhole tampering, and cable theft attempts in the right-of-way before signaling or backbone communication lines are severed. - Immune to 27 kV AC
Traction & SurgeThe passive dielectric optical fiber in the wayside corridor is completely unaffected by 25–27.5 kV AC traction catenary fields, locomotive inrush currents, and lightning surges.
Cross-Cutting Infrastructure Protection and Continuity Across the Entire Corridor
S&T and Backbone Fiber Protection
A severed signaling, interlocking, and block (S&T) cable or backbone telecom line immediately halts train dispatching and corridor operations. Using the same wayside fiber, K-DAS guards cable troughs, ducts, and splice chambers along the route—detecting heavy excavators, directional drilling, manual digging, manhole intrusion, and copper/fiber theft attempts before cable damage occurs.
A severed signaling, interlocking, and block (S&T) cable or backbone telecom line immediately halts train dispatching and corridor operations. Using the same wayside fiber, K-DAS guards cable troughs, ducts, and splice chambers along the route—detecting heavy excavators, directional drilling, manual digging, manhole intrusion, and copper/fiber theft attempts before cable damage occurs.
Route, Tunnel & Bridge Geohazards
Long-distance rail and highway corridors in mountainous, piedmont, and waterlogged terrain face recurring rockfalls, landslides, debris flows, embankment washouts, and karst sinkholes. K-DAS registers the impact of falling rocks on the trackbed, abnormal ground movement, and shifts in the vibroacoustic response of tunnel linings and bridge piers—alerting dispatchers ahead of structural failure (learn more about geotechnical monitoring).
Long-distance rail and highway corridors in mountainous, piedmont, and waterlogged terrain face recurring rockfalls, landslides, debris flows, embankment washouts, and karst sinkholes. K-DAS registers the impact of falling rocks on the trackbed, abnormal ground movement, and shifts in the vibroacoustic response of tunnel linings and bridge piers—alerting dispatchers ahead of structural failure (learn more about geotechnical monitoring).
Railways, Metro Lines & Light Rail Networks
- Blind-Spot-Free Train Tracking: real-time head/tail coordinates, speed, direction, consist length, and immediate detection of uncoupled cars;
- In-Motion Wheelset Diagnostics: automatic isolation of periodic impact pulses from wheel flats, shelled treads, seized brakes, and dragging gear;
- Track & Turnout Condition: monitoring elevated impact dynamics at rail joints, frogs, and switches, plus early detection of ballast settlement;
- Corridor & Tunnel Security: detection of unauthorized entry into tunnels, ventilation shafts, and cross-passages, as well as rockfalls onto the track.
Highways, Bridges, Airfields & Waterway Crossings
- Highways & ITS Platforms: traffic speed and density estimation, automatic detection of congestion and tunnel incidents, and right-of-way work alerts;
- Bridges, Viaducts & Overpasses: vibroacoustic monitoring of heavy-haul vehicle loads, dynamic response of spans and piers, and under-bridge security;
- Airfields, Runways & Taxiways: tracking aircraft ground roll and support vehicles in low visibility, combined with airport perimeter protection;
- Ports & Submarine Fiber Crossings: protecting underwater cables against ship anchor drag, fishing trawls, and dredging, plus quay wall impact monitoring.
27.5 kV AC EMI Immunity, Maintenance Windows & SCADA
- Immunity to 27.5 kV AC & Lightning: passive silica glass fiber is completely unaffected by catenary fields, locomotive inrush currents, and lightning surges;
- Scheduled Maintenance Windows: pre-scheduled alarm masking by time and chainage during planned track work while keeping the rest of the route active;
- Chainage & GIS Localization: time-frequency filtering separates normal traffic noise from threats, reporting kilometer post and GPS within 1.6–10 m;
- Open Dispatch, ITS & SCADA Integration: real-time event streaming via OPC UA, Modbus TCP, REST API, and SNMP (JSON / XML), plus dry-contact relays.
Site Survey & Field Pilot Trial (FAT / SAT) Workflow
To verify interrogation range, chainage localization accuracy, and acoustic classification performance on a specific railway section, tunnel, or highway corridor, K-DAS deployment follows a structured four-step engineering workflow:
- 1. Fiber Route Audit & OTDR CharacterizationReview of as-built cable documentation (direct burial, S&T concrete trough, conduit, or tunnel wall mount), OTDR trace analysis of a spare single-mode fiber from the signaling interlocking room or telecom node, and optical loss budget verification (up to 15–22 dB).
- 2. 19" Rack Installation at Interlocking or Telecom RoomMounting the K-DAS optical interrogator and industrial processing server into a standard 19" telecom rack (3U+2U) and patching into the designated dark fiber—requiring zero track possessions and zero excavation along the corridor.
- 3. Chainage Calibration & Live Traffic Signature ProfilingMapping optical fiber distance to railway kilometer posts, switches, portals, and bridge piers, recording baseline vibroacoustic signatures of passing trains or road traffic, and executing controlled right-of-way intrusion and excavation tests.
- 4. Maintenance Window Scheduling & Dispatch/SCADA IntegrationConfiguring scheduled work-zone alarm masking rules and verifying real-time event and train-track streaming into railway dispatching, highway ITS, or SCADA platforms via OPC UA, Modbus TCP, REST API, or SNMP.
Cooperation Formats for Transport Operators & Engineering Institutes
For Rail, Highway & Port Operators
Pre-project OTDR audits of existing wayside telecom and S&T fiber cables, on-site field pilot trials on active railway sections, tunnels, and bridges, supply of K-DAS systems with verified domestic manufacturer status in the Register of Kazakhstani Commodity Producers (RKCP), installation supervision, commissioning, and lifecycle support.
Pre-project OTDR audits of existing wayside telecom and S&T fiber cables, on-site field pilot trials on active railway sections, tunnels, and bridges, supply of K-DAS systems with verified domestic manufacturer status in the Register of Kazakhstani Commodity Producers (RKCP), installation supervision, commissioning, and lifecycle support.
For Engineering Institutes & EPCs
Preparation of technical specifications, optical patch-panel connection diagrams, and optical power budget calculations for signaling (S&T), telecom, ITS, and structural health monitoring (SHM) design packages during construction or modernization of railways, tunnels, bridges, highways, and airfields.
Preparation of technical specifications, optical patch-panel connection diagrams, and optical power budget calculations for signaling (S&T), telecom, ITS, and structural health monitoring (SHM) design packages during construction or modernization of railways, tunnels, bridges, highways, and airfields.
Request a Field Pilot Trial Program, Questionnaire, or K-DAS Datasheet
Contact the Ksense LLP engineering team for a pre-project assessment of your wayside fiber route, system configuration, and pilot trial program for your transport infrastructure facility.
Frequently Asked Questions (FAQ)
Answers to key engineering questions on deploying K-DAS across railways, highways, tunnels, and utility crossings
Yes. For train tracking, wheelset diagnostics, S&T/telecom cable cut prevention, and geohazard monitoring, K-DAS connects to a single spare ITU-T G.652 (or G.655 / G.657) single-mode fiber inside an existing telecom or signaling cable laid in the right-of-way, concrete trough, or tunnel. No trenching, ballast disturbance, or track possessions are required for installation.
No. The wayside sensing element is a pure silica glass optical fiber that is a complete dielectric with zero conductive parts along the corridor. System operation is completely unaffected by 25–27.5 kV AC overhead catenary fields, locomotive traction inrush currents, stray rail return currents, and lightning strikes, while the optical interrogator resides inside a protected interlocking room or telecom shelter.
As a train moves along the rail, a wheelset with a wheel flat, shelled tread, or seized brake generates periodic impact pulses at the wheel rotation frequency, which propagate through the rails and ballast into the wayside optical cable. K-DAS time-frequency algorithms isolate these periodic impact signatures from normal train rolling noise, bind them to the specific train consist, and alert the dispatcher.
K-DAS software includes scheduled maintenance window management by time and kilometer post (chainage). Dispatchers can pre-define the time window and exact chainage limits of planned track tamping, grinding, or roadwork. On that designated segment, alarms from maintenance machinery and crews are selectively masked, while the rest of the 65 km / 130 km (2×65 km) corridor remains under full active surveillance.
K-DAS systems are engineered and serially manufactured by Ksense LLP (BIN 221040043764) in Uralsk, Republic of Kazakhstan. Domestic manufacturer status is officially confirmed by inclusion in the Register of Kazakhstani Commodity Producers (RKCP) on the state portal e-ondiris.gov.kz.