Many output formats are possible, depending on the requirements of the railway maintenance staff. In particular, the following parameters can be calculated and presented in a variety of ways:

• Vertical Profile
• Horizontal Alignment
• Gauge
• Crosslevel
• Curvature
• Twist

The track information is presented graphically in track record charts while faults are presented in exception reports.

Also, a Track Quality Index is calculated which is based on the standard deviation of several of the track parameters. This can be used to gain statistical information about the track condition and can be monitored over time. These normalised track condition reports allow management to assess the state of the track and the effectiveness of track maintenance without the need to interpret numerical data.

System Features

• High Speed Operation (Up to 200km/hr)
• Proven Inertial Measurement Principles
• Non-Contact Instrumentation Techniques
• Robust, High Technology Transducers
• Single Plane of Measurement for all parameters
• Minimal Demand on Vehicle Type and Construction
• Compact Signal Processing Unit which incorporates both analogue and digital signal conditioning techniques
• On-board Technical Computer which provides system control, operator displays, data recording and reporting in real time
• Optional measurement of additional track parameters including Rail Corrugations, Cant Deficiency, Gradient, Versine, Ride Index, Cyclic Top
• Optional Post-Run analysis software tailor made to suit the customers needs, providing long term trending of Track Condition and indications of the effectiveness of track maintenance

Example of the user friendly screen layout (Click to enlarge)

Large sections of railway can easily be recorded and the information stored by the system, with parameters calculated both in real time and in post processing activities. (Photo courtesy of Robe River Iron Associates, 2000)