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  • RailMapper
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RailMapper - Mobile Mapping System for Rails

Based on the world's most accurate mobile mapping system, StreetMapper, the new RailMapper system is applicable for clearance measurement, sign detection, new construction, refurbishment and monitoring of rails and tunnels.


IGI with its partners designed this new system and established a complete solution with related workflow. By using the unique modularity of IGI equipment, one mobile mapping system can be used for various tasks and applications. Using the very latest laser scanning technology, precision navigation and advanced data processing coupled with innovative system design, RailMapper delivers proven accuracies in the most challenging environments.


The system can be equipped with different types of laser scanners which differ in prescision and range. A typical solution comprises of 2 to 3 scanners to get the best possible results. In addition different kind of RGB and video cameras for integration are available. Also the DigiTHERM sensor is compliant to deliver digital thermal imagery.


RailMapper system installation on a tower railcar TVT-700
RailMapper system installation on a tower railcar TVT-700.
TERRAcontrol with SMU units
TERRAcontrol with SMU units

Precise Geo-Referencing - the heart of the system

The onboard navigation system includes a high end Global Navigation Satellite System (GNSS) receiver, a fibre optic gyro-based Inertial Measurement Unit (IMU) and the latest Direct Inertial Aiding Plus (DIA+) to assist in areas of poor GPS/GLONASS reception. RailMapper is the only system on the market to offer this level of precision navigation.

 

Based on IGI's Modular System Concept parts of the system can be exchanged into compliant land or air based systems. At the heart of nearly every precise system is its TERRAcontrol/AEROcontrol unit which can be used for terrestrial and airborne missions in order to be flexible and cost-saving. The photo to the right shows a TERRAcontrol unit. The small black Sensor Management Units (SMU) are interchangleable to other system solutions as StreetMapper or LiteMapper.

 

Please have a look at the Youtube video for an introduction:

Results of a survey of German Rail route no. 2651 and 3710. Installation on a tower railcar, TVT-700.

Deliverables

An inherent feature of LiDAR data is that it is acquired, processed and delivered in a digital format, making it very easy to work with and to create data products that meet a wide range of needs. Immediately after the survey the data is processed to provide point data with XYZ position and reflective intensity. Depending upon the customer's requirements, the data can be processed and analysed further:

  • Classification of laser data (for example ground, vegetation, buildings, wires)
  • Vectorisation of laser data
  • Measurement of objects
  • 3D-Visualizations of surveying area
  • Automatic track identification
  • Automatic data processing for clearance measurement profiles, EN 15273-1 compliant
  • Set-actual comparison of data sets
  • Collision tests and passing simulations
  • Semiautomatic modelling of power lines
Clearance measurements are used for the safe usage of railroads by normal trains and especially for oversize trains of enormous importance. Even small objects that protrude into narrowings or minimal displacement of railroads can cause great damage and costs. Possible slight rail movements or relocation of structures both require inspections and surveying. Interference with daily train travel may not result from surveying activities. A prerequisite is a surveying train with a minimum speed of 90 km/h or more, so that it can be used on high-speed tracks.

Ease of Use

RailMapper has dedicated control touch-screens that show status information and allows the data capture parameters to be adjusted. Operations that require a higher level of skill - such as GNSS processing - are undertaken post-mission using sophisticated software for processing the collected navigation data, laser survey measurements and camera, thermal or video images.

Specifications Laser Scanner

Laser Scanner VQ250T - highest precision up to 30m
Pulse Repetition Rate 300 kHz
Effective Measurement Rate 300 kHz
Min. Range 1.5 m
Max. Range (natural targets ρ ≥ 10%) 30 m
Accuracy 6 mm
Repeatability 4 mm
Scanning angle 360°
Scanning rate 100 scans/sec
Number of targets per pulse Unlimited
Angular resolution 0.009°
Angular accuracy 0.001°
Eye-safety Class 1 eye-safe
Beam divergence 0.3 mrad
Dimension (l x w x h) 376 x 192 x 218 mm
Weight 11 kg
Operating temperature -10°C to +40°C
Protection class IP64

 

Laser Scanner VQ250 - high precision up to 300m
Pulse Repetition Rate 300 kHz
Effective Measurement Rate 300 kHz
Min. Range 1.5 m
Max. Range (reflectivity ρ ≥ 80%) 200 - 500 m
Accuracy 10 mm
Repeatability 5 mm
Scanning angle 360°
Scanning rate 100 scans/sec
Number of targets per pulse Unlimited
Angular resolution 0.009°
Angular accuracy 0.001°
Eye-safety Class 1 eye-safe
Beam divergence 0.3 mrad
Dimension (l x w x h) 376 x 192 x 218 mm
Weight 11 kg
Operating temperature -10°C to +40°C
Protection class IP64

 

Laser Scanner VQ450 - densest point cloud up to 200m
Pulse Repetition Rate 550 kHz
Effective Measurement Rate 550 kHz
Min. Range 1.5 m
Max. Range (reflectivity ρ ≥ 80%) 200 - 800 m
Accuracy 8 mm
Repeatability 5 mm
Scanning angle 360°
Scanning rate 200 scans/sec
Number of targets per pulse Unlimited
Angular resolution 0.009°
Angular accuracy 0.001°
Eye-safety Class 1 eye-safe
Beam divergence 0.3 mrad
Dimension (l x w x h) 377 x 205.5 x 218 mm
Weight 12.5 kg
Operating temperature -10°C to +40°C
Protection class IP64

 

Average Point Density

Average Point Density (pts/m² @ 5m range)
  25 kph 30 kph 60 kph 80 kph 100 kph
Based on one VQ250
1375 860 573 430 344

 

Highlights

  • Rail survey with automatic clearance measurement (EN 15273-1 compliant)
  • Control of construction progress (set-actual comparison)
  • Sign detection & tunnel profile measurement
  • 3D-Visualizations of surveying area
  • Semiautomatic modelling of power lines
  • Collision tests and passing simulations
  • 360° Field of View
  • Up to 550 kHz effective measurement rate
  • 1,400,000 3D points per second whilst in motion
  • Up to 800 m scanning range
  • Optical Odometer to achieve best results
  • Graphical user interface with touch-screen
  • Precise Navigation using TerraControl with DIA+
  • Rapid mapping during traffic
  • Flexible deployment because part of IGI's Modular System Concept. Parts of the system can be reused in StreetMapper or LiteMapper installations.